Adds POM relocations

Makes sure to unregister and refund on the sign edit event, as the sign might be registered as a paid sign already.
Updates Spigot
Updates Vault repository

HEADER

@@ -0,0 +1,15 @@
+PaidSigns - A sign payment plugin for Spigot
+Copyright (C) 2022 Kristian Knarvik (EpicKnarvik97)
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.

Jenkinsfile

@@ -0,0 +1,33 @@
+pipeline {
+    agent any
+    tools {
+        jdk 'JDK17'
+    }
+    stages {
+        stage('Build') {
+            steps {
+                echo 'Building...'
+                sh 'mvn clean & mvn validate & mvn compile'
+            }
+        }
+        stage('Test') {
+            steps {
+                echo 'Testing...'
+                sh 'mvn test'
+            }
+        }
+        stage('Verify') {
+            steps {
+                echo 'Verifying...'
+                sh 'mvn verify -Dmaven.test.skip=true'
+            }
+        }
+        stage('Deploy') {
+             steps {
+                echo 'Deploying...'
+                sh 'mvn deploy -Dmaven.install.skip=true -Dmaven.test.skip=true'
+                archiveArtifacts artifacts: '**/target/*.jar', fingerprint: true
+            }
+        }
+    }
+}

LICENSE

@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
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+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

README.md

@@ -1,12 +1,187 @@
 # Paid signs
 
 The paid-signs plugin is a plugin that lets you add costs for creating plugin signs. This allows restricting usage of
-signs such as CraftBook's gate/lift and other signs while still allowing every player to use the signs.
+signs such as CraftBook's gate/lift and other signs while still allowing every player to create the signs.
+
+Note: OP players, and players with the '*' permission will have the `paidsigns.paymentexempt` permission and will not
+see any payment messages. For testing, you'll need to un-set the `paidsigns.paymentexempt` permission.
 
 ## Limitations
 
 As this plugin only listens to sign change events, there are some limitations:
 
-1. The plugin is not aware of whether the creation of a sign is successful
+1. The plugin is not aware of whether the creation of a sign is successful. Setting the appropriate permission might
-2. It is assumed that any protection plugins run before this plugin, but it's not guaranteed
+   help, but it's not guaranteed
-3. Plugins changing the lines on signs when successful might create confusion and mismatches
+2. It is assumed that any protection plugins run before this plugin checks a sign, but it's not guaranteed
+3. Plugins changing the lines on signs when successful might create confusion and mismatches if changes happen before
+   this plugin checks a sign
+
+## FAQ
+
+### A player placed down a sign, but some plugin broke it afterwards. What do I do?
+
+There are three ways this can be solved:
+
+1. Make the player (or anyone else) place an empty sign in the same location and break it again. The player should be
+   refunded as long as refunds are enabled.
+2. Reload PaidSigns. The player should be refunded as long as refunds are enabled.
+3. Restart the server. The player should be refunded as long as refunds are enabled. Never place a new paid sign in the
+   same location in this situation, as the old sign will be overwritten, and the ability to refund the player
+   automatically will be lost.
+
+### Players have to pay for signs, even if the plugin sign isn't created
+
+This is a known limitation of this plugin. As long as this plugin is agnostic to the plugin signs it's used for, it
+cannot really know if a plugin sign has been created. The best you can do is finding the permission required for the
+plugin sign and specifying it when creating the paid sign. It can be assumed that the player is able to create the
+plugin sign, if the player has the correct permission.
+
+### How can this plugin be used to enhance a server?
+
+This plugin is known to be helpful with two tasks:
+
+1. Allow normal players to create plugin signs, such as CraftBook's elevator signs, but at a cost. This can be done by
+   simply specifying the exact text required for the plugin sign in the paid sign conditions.
+2. Add a swearing jar/swearing filter to the server. This can be done with a paid sign matching ANY condition, where the
+   list of swear words is given as a regEx. The same regEx should be added for each of the four sign lines.
+
+## Custom parser
+
+Before anything else, it's important to note that as an experiment, I used a custom command-parser for this plugin. This
+means that sign names can contain spaces, as long as the name is in quotes. In most cases, this actually works fine,
+even though it differs a lot from the default behavior, but if you tab-complete the first word in the name first, and
+then try to tab-complete the rest, tab-completion will fill in the second world with the entire name, which is
+unfortunate. That's really just how tab-completion works, and not something I think I can do anything with.
+
+## Commands
+
+An argument marked by "<>" is required to execute the command. An argument marked by "[]" is optional. For empty
+arguments, such as no paid sign permission, you should use empty quotes ("").
+
+| Command                                              | Arguments                                                                                               | Permission       | Description                                                               |
+|------------------------------------------------------|---------------------------------------------------------------------------------------------------------|------------------|---------------------------------------------------------------------------|
+| /paidsigns                                           |                                                                                                         | paidsigns.info   | Used to display in-game information about all other commands              |
+| [/addpaidsign](#addpaidsign)                         | \<name> \<cost> \[permission] \[ignore case] \[ignore color] \[match any condition]                     | paidsigns.manage | Used to add a new paid sign                                               |
+| [/addpaidsigncondition](#addpaidsigncondition)       | \<name (of a paid sign)> \<line number> \<string to match> \[executeRegEx] \[ignoreCase] \[ignoreColor] | paidsigns.manage | Used to add a condition to a paid sign                                    |
+| [/listpaidsigns](#listpaidsigns)                     | \[name (of a paid sign)] \[line number]                                                                 | paidsigns.manage | Used to list registered paid signs or a registered paid sign's conditions |
+| [/editpaidsign](#editpaidsign)                       | \<sign name> \<property>/\<line number> \[new value]/\<property> \[new value]                           | paidsigns.manage | Used to modify a registered paid sign or one of its conditions            |
+| [/removepaidsigncondition](#removepaidsigncondition) | \<name (of a paid sign)> \<line number>                                                                 | paidsigns.manage | Used to remove a condition from a registered paid sign                    |
+| [/removepaidsign](#removepaidsign)                   | \<name (of a paid sign)>                                                                                | paidsigns.manage | Used to remove a registered paid sign                                     |
+| /reload                                              |                                                                                                         | paidsigns.reload | Used to reload the configuration file                                     |
+
+## Command explanation
+
+### /addpaidsign
+
+This command adds a new paid sign that does nothing until a condition is added.
+
+`/addpaidsign <name> <cost> [permission] [ignore case] [ignore color] [match any condition]`
+
+| Argument            | Usage                                                                                                                                                                                                                    |
+|---------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| name                | A recognizable name only used to differentiate between registered paid signs                                                                                                                                             |
+| cost                | The cost a player needs to pay to create any sign matching the paid sign                                                                                                                                                 |
+| permission          | If the paid sign is used to represent a plugin sign, the permission should be the permission necessary for creating the plugin sign. This is used to decide if the plugin sign was created, or if the player was denied. |
+| ignore case         | Whether any conditions of the paid sign should ignore case by default, when matching against text (default uses the config file value).                                                                                  |
+| ignore color        | Whether any condition of the paid sign should ignore color by default, when matching against text (default uses the config file value).                                                                                  |
+| match any condition | Whether to trigger a paid sign match if a single one of the sign's conditions is true. This is mainly useful if several lines may contain the match string, or if trying to match a word.                                |
+
+### /addpaidsigncondition
+
+This adds a condition to a paid sign which is used to decide if a sign created by a player matches the paid sign. Adding
+a paid sign condition to a line that already has one will replace the previous condition.
+
+`/addpaidsigncondition <name (of a paid sign)> <line number> <string to match> [executeRegEx] [ignoreCase] [ignoreColor]`
+
+| Argument        | Usage                                                                                                               |
+|-----------------|---------------------------------------------------------------------------------------------------------------------|
+| name            | The name of the paid sign to add the condition to                                                                   |
+| line number     | The line on the sign (1-4) to search for any matches                                                                |
+| string to match | The string or regular expression to look for on a sign                                                              |
+| executeRegEx    | Whether to use a regular expression match instead of looking for the exact string                                   |
+| ignoreCase      | Whether this condition should ignore case when trying to match the string (default uses the "parent" sign's value)  |
+| ignoreColor     | Whether this condition should ignore color when trying to match the string (default uses the "parent" sign's value) |
+
+### /listpaidsigns
+
+This lists registered paid signs and paid sign conditions. No arguments will print a list of paid signs
+
+`/listpaidsigns [page number]/[name (of a paid sign)] [line number]`
+
+| Argument    | Usage                                                                           |
+|-------------|---------------------------------------------------------------------------------|
+| page number | Paid signs are listed 7 at a time, so the page number is used to see the next 7 |
+| name        | The name of the paid sign to see information about                              |
+| line number | The line number of the condition to see information about                       |
+
+### /editpaidsign
+
+This command changes a property of a paid sign or a paid sign condition
+
+`/editpaidsign <sign name> <property>/<line number> [new value]/<property> [new value]`
+
+| Argument               | Usage                                                                                                                                                                                                           |
+|------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| name                   | The name of the paid sign to edit                                                                                                                                                                               |
+| property / line number | The property to edit for the sign (name, cost, permission, ignoreCase, ignoreColor, matchAnyCondition), or the line of the condition to edit                                                                    |
+| new value / property   | The new property value if a property was specified in the second argument, or a condition property (stringToMatch, executeRegEx, ignoreCase, ignoreColor) if a line number was specified in the second argument |
+| new value              | The new property value of the condition property specified in the third argument                                                                                                                                |
+
+### /removepaidsigncondition
+
+Removes a paid sign condition from a sign
+
+`/removepaidsigncondition <name (of a paid sign)> <line number>`
+
+| Argument    | Usage                                                  |
+|-------------|--------------------------------------------------------|
+| name        | The name of the paid sign to remove the condition from |
+| line number | The line the condition is associated with              |
+
+### /removepaidsign
+
+Removes a registered paid sign
+
+`/removepaidsign <name (of a paid sign)>`
+
+| Argument | Usage                               |
+|----------|-------------------------------------|
+| name     | The name of the paid sign to remove |
+
+## Permissions
+
+| Node                      | Description                                          |
+|---------------------------|------------------------------------------------------|
+| paidsigns.*               | Grants all paid signs permissions                    |
+| --paidsigns.manage        | Grants the permission to add/remove a paid sign      |
+| --paidsigns.reload        | Grants the permissions to reload the plugin          |
+| --paidsigns.paymentexempt | Makes this player exempt from the cost of paid signs |
+
+## Configuration options
+
+| Option           | Description                                                                                                                                                                                                                                                                             |
+|------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| language         | The language to use for all messages displayed to players. Currently, only "en" is valid.                                                                                                                                                                                               |
+| ignoreCase       | Whether to ignore the case (lowercase/uppercase) of the paid sign text. The option can be set on a per-sign basis, but this value is used if not specified. The correct value depends on whether the plugin signs it should match are case-sensitive or not.                            |
+| ignoreColor      | Whether to ignore any color or formatting applied to the text when trying to match a paid sign's text. The option can be set on a per-sign basis, but this value is used if not specified. The correct value depends on whether the plugin signs it should match allow coloring or not. |
+| refundsEnabled   | Whether to enable refunds to the sign creator when a sign detected as a paid sign is broken (payment will always go to the original creator)                                                                                                                                            |
+| refundPercentage | The percentage of the paid sign cost to refund (0-100)                                                                                                                                                                                                                                  |
+| refundAlways     | Whether to refund when signs that players have paid for are broken by anything. This includes tnt, creepers, pistons and similar                                                                                                                                                        |
+
+## Language customization
+
+All strings, even time units, are customizable. If you place a strings.yml file in the plugin folder, it will take
+priority over built-in languages. If you want to change strings, look
+at [PaidSigns/src/main/resources/strings.yml](https://git.knarcraft.net/EpicKnarvik97/PaidSigns/src/branch/master/src/main/resources/strings.yml)
+for the proper keys. All strings have the format: ENUM: "Displayed string". The enum must be identical as it defines
+which string you have changed. All strings belonging to a language are beneath the language code and indented with two
+spaces.
+
+The easiest way to add a new language is to copy an existing language and paste it into your custom strings.yml and
+change strings as necessary. If you don't include all strings, the remaining will use the built-in English translation.
+Remember to change the language code to whichever you use for your custom language.
+
+## License
+
+PaidSigns is licensed under the GNU Public License Version 3.0. This includes every source and resource file. See the
+HEADER file for a more detailed license description.

pom.xml

@@ -6,17 +6,17 @@
 
     <groupId>net.knarcraft</groupId>
     <artifactId>paidsigns</artifactId>
-    <version>1.0-SNAPSHOT</version>
+    <version>1.0.4-SNAPSHOT</version>
     <packaging>jar</packaging>
 
     <name>Paid Signs</name>
 
     <description>Add costs for creating plugin signs</description>
     <properties>
-        <java.version>17</java.version>
+        <java.version>16</java.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>
-    <url>https://git.knarcraft.net</url>
+    <url>https://git.knarcraft.net/EpicKnarvik97/PaidSigns</url>
 
     <build>
         <plugins>
@@ -25,14 +25,14 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.8.1</version>
                 <configuration>
-                    <source>16</source>
+                    <source>${java.version}</source>
-                    <target>16</target>
+                    <target>${java.version}</target>
                 </configuration>
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-shade-plugin</artifactId>
-                <version>3.2.4</version>
+                <version>3.3.0</version>
                 <executions>
                     <execution>
                         <phase>package</phase>
@@ -41,6 +41,36 @@
                         </goals>
                         <configuration>
                             <createDependencyReducedPom>false</createDependencyReducedPom>
+                            <relocations>
+                                <relocation>
+                                    <pattern>net.knarcraft.knarlib</pattern>
+                                    <shadedPattern>net.knarcraft.paidsigns.lib.knarlib</shadedPattern>
+                                </relocation>
+                                <relocation>
+                                    <pattern>org.jetbrains.annotations</pattern>
+                                    <shadedPattern>net.knarcraft.paidsigns.lib.annotations</shadedPattern>
+                                </relocation>
+                            </relocations>
+                            <filters>
+                                <filter>
+                                    <artifact>net.knarcraft:knarlib</artifact>
+                                    <includes>
+                                        <include>net/knarcraft/knarlib/**</include>
+                                    </includes>
+                                </filter>
+                                <filter>
+                                    <artifact>org.jetbrains:annotations</artifact>
+                                    <includes>
+                                        <include>org/jetbrains/annotations/**</include>
+                                    </includes>
+                                </filter>
+                                <filter>
+                                    <excludes>
+                                        <exclude>*.MF</exclude>
+                                        <exclude>*.yml</exclude>
+                                    </excludes>
+                                </filter>
+                            </filters>
                         </configuration>
                     </execution>
                 </executions>
@@ -55,6 +85,10 @@
     </build>
 
     <repositories>
+        <repository>
+            <id>knarcraft-repo</id>
+            <url>https://git.knarcraft.net/api/packages/EpicKnarvik97/maven</url>
+        </repository>
         <repository>
             <id>spigotmc-repo</id>
             <url>https://hub.spigotmc.org/nexus/content/repositories/snapshots/</url>
@@ -64,28 +98,44 @@
             <url>https://oss.sonatype.org/content/groups/public/</url>
         </repository>
         <repository>
-            <id>vault-repo</id>
+            <id>jitpack.io</id>
-            <url>http://nexus.hc.to/content/repositories/pub_releases</url>
+            <url>https://jitpack.io</url>
         </repository>
     </repositories>
+    <distributionManagement>
+        <repository>
+            <id>knarcraft-repo</id>
+            <url>https://git.knarcraft.net/api/packages/EpicKnarvik97/maven</url>
+        </repository>
+        <snapshotRepository>
+            <id>knarcraft-repo</id>
+            <url>https://git.knarcraft.net/api/packages/EpicKnarvik97/maven</url>
+        </snapshotRepository>
+    </distributionManagement>
 
     <dependencies>
         <dependency>
             <groupId>org.spigotmc</groupId>
             <artifactId>spigot-api</artifactId>
-            <version>1.18.1-R0.1-SNAPSHOT</version>
+            <version>1.20.1-R0.1-SNAPSHOT</version>
             <scope>provided</scope>
         </dependency>
         <dependency>
-            <groupId>net.milkbowl.vault</groupId>
+            <groupId>com.github.MilkBowl</groupId>
             <artifactId>VaultAPI</artifactId>
-            <version>1.7</version>
+            <version>1.7.1</version>
             <scope>provided</scope>
         </dependency>
         <dependency>
             <groupId>org.jetbrains</groupId>
             <artifactId>annotations</artifactId>
-            <version>22.0.0</version>
+            <version>24.0.1</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>net.knarcraft</groupId>
+            <artifactId>knarlib</artifactId>
+            <version>1.1</version>
             <scope>compile</scope>
         </dependency>
     </dependencies>

src/main/java/net/knarcraft/paidsigns/PaidSigns.java

@@ -1,15 +1,31 @@
 package net.knarcraft.paidsigns;
 
+import net.knarcraft.knarlib.formatting.StringFormatter;
+import net.knarcraft.knarlib.formatting.Translator;
+import net.knarcraft.knarlib.util.UpdateChecker;
 import net.knarcraft.paidsigns.command.AddCommand;
+import net.knarcraft.paidsigns.command.AddConditionCommand;
+import net.knarcraft.paidsigns.command.AddConditionTabCompleter;
 import net.knarcraft.paidsigns.command.AddTabCompleter;
+import net.knarcraft.paidsigns.command.EditCommand;
+import net.knarcraft.paidsigns.command.EditTabCompleter;
+import net.knarcraft.paidsigns.command.ListCommand;
+import net.knarcraft.paidsigns.command.ListTabCompleter;
+import net.knarcraft.paidsigns.command.PaidSignsTabCommand;
 import net.knarcraft.paidsigns.command.ReloadTabCommand;
-import net.knarcraft.paidsigns.command.RemoveCommand;
+import net.knarcraft.paidsigns.command.RemoveConditionCommand;
-import net.knarcraft.paidsigns.command.RemoveTabCompleter;
+import net.knarcraft.paidsigns.command.RemoveConditionTabCompleter;
+import net.knarcraft.paidsigns.command.RemoveTabCommand;
+import net.knarcraft.paidsigns.formatting.PaidSignsTranslatableMessage;
+import net.knarcraft.paidsigns.listener.SignBreakListener;
 import net.knarcraft.paidsigns.listener.SignListener;
 import net.knarcraft.paidsigns.manager.EconomyManager;
 import net.knarcraft.paidsigns.manager.PaidSignManager;
+import net.knarcraft.paidsigns.manager.TrackedSignManager;
 import net.milkbowl.vault.economy.Economy;
+import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.PluginCommand;
+import org.bukkit.command.TabCompleter;
 import org.bukkit.command.TabExecutor;
 import org.bukkit.configuration.file.FileConfiguration;
 import org.bukkit.plugin.PluginManager;
@@ -23,9 +39,15 @@ import org.bukkit.plugin.java.JavaPlugin;
 public final class PaidSigns extends JavaPlugin {
 
     private static PaidSigns paidSigns;
+    private static Translator translator;
+    private static StringFormatter stringFormatter;
     private PaidSignManager signManager;
+    private String language;
     private boolean ignoreCase;
     private boolean ignoreColor;
+    private boolean refundsEnabled;
+    private short refundPercentage;
+    private boolean refundAlways;
 
     /**
      * Instantiates a new paid signs object
@@ -44,16 +66,46 @@ public final class PaidSigns extends JavaPlugin {
         return paidSigns;
     }
 
+    /**
+     * Gets the translator to use for this plugin
+     *
+     * @return <p>The translator to use for this plugin</p>
+     */
+    public static Translator getTranslator() {
+        return translator;
+    }
+
+    /**
+     * Gets the string formatter to use for this plugin
+     *
+     * @return <p>The string formatter to use for this plugin</p>
+     */
+    public static StringFormatter getStringFormatter() {
+        return stringFormatter;
+    }
+
     @Override
     public void onEnable() {
         setupVault();
-        signManager = new PaidSignManager(PaidSignManager.loadSigns());
         loadConfig();
 
+        //Initialize translator
+        translator = new Translator();
+        translator.registerMessageCategory(PaidSignsTranslatableMessage.BOOLEAN_TRUE);
+        translator.loadLanguages(this.getDataFolder(), "en", language);
+        stringFormatter = new StringFormatter(this.getDescription().getPrefix(), translator);
+
+        signManager = new PaidSignManager(PaidSignManager.loadSigns());
+        TrackedSignManager.loadTrackedSigns();
+
         PluginManager pluginManager = getServer().getPluginManager();
         pluginManager.registerEvents(new SignListener(), this);
+        pluginManager.registerEvents(new SignBreakListener(), this);
 
         registerCommands();
+
+        UpdateChecker.checkForUpdate(this, "https://api.spigotmc.org/legacy/update.php?resource=105842",
+                () -> this.getDescription().getVersion(), null);
     }
 
     @Override
@@ -66,7 +118,9 @@ public final class PaidSigns extends JavaPlugin {
     public void reload() {
         this.reloadConfig();
         loadConfig();
+        translator.loadLanguages(this.getDataFolder(), "en", language);
         signManager = new PaidSignManager(PaidSignManager.loadSigns());
+        TrackedSignManager.loadTrackedSigns();
     }
 
     /**
@@ -96,27 +150,69 @@ public final class PaidSigns extends JavaPlugin {
         return this.ignoreColor;
     }
 
+    /**
+     * Checks whether refunds are currently enabled
+     *
+     * @return <p>Whether refunds are currently enabled</p>
+     */
+    public boolean areRefundsEnabled() {
+        return this.refundsEnabled;
+    }
+
+    /**
+     * Gets the percentage of the initial cost to refund the sign creator
+     *
+     * @return <p>The percentage of the cost to refund</p>
+     */
+    public short getRefundPercentage() {
+        if (this.refundPercentage < 0) {
+            return 0;
+        } else if (refundPercentage > 100) {
+            return 100;
+        }
+        return this.refundPercentage;
+    }
+
+    /**
+     * Gets whether refunds should always happen, even if signs are not broken by players
+     *
+     * @return <p>True if refunds should always happen</p>
+     */
+    public boolean refundAlways() {
+        return this.refundAlways;
+    }
+
     /**
      * Registers the commands used by this plugin
      */
     private void registerCommands() {
-        PluginCommand addCommand = this.getCommand("addPaidSign");
+        TabExecutor paidSignsExecutor = new PaidSignsTabCommand();
-        if (addCommand != null) {
+        registerCommand("paidSigns", paidSignsExecutor, paidSignsExecutor);
-            addCommand.setExecutor(new AddCommand());
+        registerCommand("addPaidSign", new AddCommand(), new AddTabCompleter());
-            addCommand.setTabCompleter(new AddTabCompleter());
+        registerCommand("listPaidSigns", new ListCommand(), new ListTabCompleter());
-        }
+        registerCommand("addPaidSignCondition", new AddConditionCommand(), new AddConditionTabCompleter());
+        registerCommand("removePaidSignCondition", new RemoveConditionCommand(),
+                new RemoveConditionTabCompleter());
+        registerCommand("editPaidSign", new EditCommand(), new EditTabCompleter());
 
-        PluginCommand removeCommand = this.getCommand("removePaidSign");
+        TabExecutor removeTabExecutor = new RemoveTabCommand();
-        if (removeCommand != null) {
+        registerCommand("removePaidSign", removeTabExecutor, removeTabExecutor);
-            removeCommand.setExecutor(new RemoveCommand());
-            removeCommand.setTabCompleter(new RemoveTabCompleter());
-        }
-
-        PluginCommand reloadCommand = this.getCommand("reload");
-        if (reloadCommand != null) {
         TabExecutor reloadTabExecutor = new ReloadTabCommand();
-            reloadCommand.setExecutor(reloadTabExecutor);
+        registerCommand("reload", reloadTabExecutor, reloadTabExecutor);
-            reloadCommand.setTabCompleter(reloadTabExecutor);
+    }
+
+    /**
+     * Registers a command if possible
+     *
+     * @param command         <p>The command to register</p>
+     * @param commandExecutor <p>The command executor for executing the command</p>
+     * @param tabCompleter    <p>The tab completer for tab-completing the command</p>
+     */
+    private void registerCommand(String command, CommandExecutor commandExecutor, TabCompleter tabCompleter) {
+        PluginCommand pluginCommand = this.getCommand(command);
+        if (pluginCommand != null) {
+            pluginCommand.setExecutor(commandExecutor);
+            pluginCommand.setTabCompleter(tabCompleter);
         }
     }
 
@@ -127,8 +223,13 @@ public final class PaidSigns extends JavaPlugin {
         FileConfiguration config = this.getConfig();
         config.options().copyDefaults(true);
         this.saveDefaultConfig();
+        this.saveConfig();
+        language = config.getString("language", "en");
         ignoreCase = config.getBoolean("ignoreCase", true);
         ignoreColor = config.getBoolean("ignoreColor", false);
+        refundsEnabled = config.getBoolean("refundsEnabled", true);
+        refundPercentage = (short) config.getInt("refundPercentage", 100);
+        refundAlways = config.getBoolean("refundAlways", false);
     }
 
     /**
@@ -140,7 +241,7 @@ public final class PaidSigns extends JavaPlugin {
         if (economyProvider != null) {
             EconomyManager.initialize(economyProvider.getProvider());
         } else {
-            throw new IllegalStateException("[PaidSigns] Error: Vault could not be loaded");
+            throw new IllegalStateException("Error: Vault could not be loaded");
         }
     }
 

src/main/java/net/knarcraft/paidsigns/command/AddCommand.java

@@ -2,73 +2,86 @@ package net.knarcraft.paidsigns.command;
 
 import net.knarcraft.paidsigns.PaidSigns;
 import net.knarcraft.paidsigns.container.PaidSign;
+import net.knarcraft.paidsigns.formatting.PaidSignsTranslatableMessage;
 import net.knarcraft.paidsigns.manager.PaidSignManager;
 import net.knarcraft.paidsigns.property.OptionState;
-import net.knarcraft.paidsigns.utility.Tokenizer;
 import org.bukkit.command.Command;
-import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.jetbrains.annotations.NotNull;
 
 import java.io.IOException;
-import java.util.Arrays;
-import java.util.List;
-import java.util.logging.Level;
-import java.util.logging.Logger;
 
 /**
  * A representation of the command for adding a new paid sign
  */
-public class AddCommand implements CommandExecutor {
+public class AddCommand extends TokenizedCommand {
 
     @Override
     public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label,
                              @NotNull String[] args) {
-        if (args.length < 3) {
+        super.onCommand(sender, command, label, args);
+        if (argumentSize < 2) {
             return false;
         }
-        PaidSignManager manager = PaidSigns.getInstance().getSignManager();
-        List<String> arguments = Tokenizer.tokenize(String.join(" ", args));
 
-        String id = arguments.get(0);
+        String signName = arguments.get(0).trim();
-        short line;
         double cost;
         try {
-            line = (short) (Short.parseShort(arguments.get(1)) - 1);
+            cost = Double.parseDouble(arguments.get(1));
-            cost = Double.parseDouble(arguments.get(2));
         } catch (NumberFormatException exception) {
-            sender.sendMessage("You provided an invalid number");
+            PaidSigns.getStringFormatter().displayErrorMessage(sender, PaidSignsTranslatableMessage.ERROR_INVALID_NUMBER);
             return false;
         }
+        String permission = "";
+        if (argumentSize > 2) {
+            permission = arguments.get(2);
+        }
         OptionState ignoreCase = OptionState.DEFAULT;
         OptionState ignoreColor = OptionState.DEFAULT;
-        if (arguments.size() > 3) {
+        if (argumentSize > 3) {
             ignoreCase = OptionState.fromString(arguments.get(3));
         }
-        if (arguments.size() > 4) {
+        if (argumentSize > 4) {
             ignoreColor = OptionState.fromString(arguments.get(4));
         }
-
+        boolean matchAnyCondition = false;
-        try {
+        if (argumentSize > 5) {
-            PaidSign sign = new PaidSign(id, line, cost, ignoreCase, ignoreColor);
+            matchAnyCondition = Boolean.parseBoolean(arguments.get(5));
-            for (PaidSign similarSign : manager.getPaidSigns(sign.getCleanId(), sign.getLineIndex())) {
-                if (sign.matches(similarSign)) {
-                    sender.sendMessage("A paid sign with the same id and line already exists");
-                    return false;
         }
+
+        return createPaidSign(sender, signName, cost, permission, ignoreCase, ignoreColor, matchAnyCondition);
+    }
+
+    /**
+     * Creates a new paid sign with the given user input
+     *
+     * @param sender            <p>The command sender that called the add command</p>
+     * @param signName          <p>The name of the new paid sign</p>
+     * @param cost              <p>The cost of the new paid sign</p>
+     * @param permission        <p>The permission required for creating the sign represented by the paid sign</p>
+     * @param ignoreCase        <p>Whether to ignore case for the paid sign's conditions</p>
+     * @param ignoreColor       <p>Whether to ignore color for the paid sign's conditions</p>
+     * @param matchAnyCondition <p>Whether to treat any matching condition as a sign match</p>
+     * @return <p>True if the paid sign was successfully created and registered</p>
+     */
+    private boolean createPaidSign(CommandSender sender, String signName, double cost, String permission,
+                                   OptionState ignoreCase, OptionState ignoreColor, boolean matchAnyCondition) {
+        PaidSignManager manager = PaidSigns.getInstance().getSignManager();
+        try {
+            PaidSign sign = new PaidSign(signName, cost, permission, ignoreCase, ignoreColor, matchAnyCondition);
+            if (manager.getPaidSign(signName) != null) {
+                PaidSigns.getStringFormatter().displayErrorMessage(sender, PaidSignsTranslatableMessage.ERROR_NAME_DUPLICATE);
+                return false;
             }
             manager.addPaidSign(sign);
-            sender.sendMessage("Successfully added new paid sign");
+            PaidSigns.getStringFormatter().displaySuccessMessage(sender, PaidSignsTranslatableMessage.SUCCESS_ADDED_PAID_SIGN);
             return true;
         } catch (IOException e) {
-            Logger logger = PaidSigns.getInstance().getLogger();
+            PaidSigns.getStringFormatter().displayErrorMessage(sender, PaidSignsTranslatableMessage.ERROR_EXCEPTION_OCCURRED);
-            logger.log(Level.SEVERE, "Exception encountered while trying to write " +
-                    "to the data file");
-            logger.log(Level.SEVERE, Arrays.toString(e.getStackTrace()));
-            sender.sendMessage("An exception occurred. Please notify the server administrator or check the server log.");
             return false;
         } catch (IllegalArgumentException e) {
-            sender.sendMessage("Invalid input: " + e.getMessage());
+            PaidSigns.getStringFormatter().displayErrorMessage(sender, PaidSigns.getStringFormatter().replacePlaceholder(
+                    PaidSignsTranslatableMessage.ERROR_INVALID_INPUT, "{input}", e.getMessage()));
         }
         return false;
     }

src/main/java/net/knarcraft/paidsigns/command/AddConditionCommand.java

@@ -0,0 +1,89 @@
+package net.knarcraft.paidsigns.command;
+
+import net.knarcraft.paidsigns.PaidSigns;
+import net.knarcraft.paidsigns.container.PaidSign;
+import net.knarcraft.paidsigns.formatting.PaidSignsTranslatableMessage;
+import net.knarcraft.paidsigns.manager.PaidSignManager;
+import net.knarcraft.paidsigns.property.OptionState;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
+
+import java.io.IOException;
+
+/**
+ * A representation of the command for adding a new match condition for a sign
+ */
+public class AddConditionCommand extends TokenizedCommand {
+
+    @Override
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label,
+                             @NotNull String[] args) {
+        super.onCommand(sender, command, label, args);
+        if (argumentSize < 3) {
+            return false;
+        }
+
+        String name = arguments.get(0);
+        short lineNumber;
+        try {
+            lineNumber = (short) (Short.parseShort(arguments.get(1)) - 1);
+            if (lineNumber < 0 || lineNumber > 3) {
+                PaidSigns.getStringFormatter().displayErrorMessage(sender, PaidSignsTranslatableMessage.ERROR_INVALID_NUMBER);
+                return false;
+            }
+        } catch (NumberFormatException exception) {
+            PaidSigns.getStringFormatter().displayErrorMessage(sender, PaidSignsTranslatableMessage.ERROR_INVALID_NUMBER);
+            return false;
+        }
+        String stringToMatch = arguments.get(2);
+        boolean executeRegEx = false;
+        if (argumentSize > 3) {
+            executeRegEx = Boolean.parseBoolean(arguments.get(3));
+            if (executeRegEx && isRegExInvalid(sender, stringToMatch)) {
+                return false;
+            }
+        }
+        OptionState ignoreCase = OptionState.DEFAULT;
+        if (argumentSize > 4) {
+            ignoreCase = OptionState.getFromBoolean(Boolean.parseBoolean(arguments.get(4)));
+        }
+        OptionState ignoreColor = OptionState.DEFAULT;
+        if (argumentSize > 5) {
+            ignoreColor = OptionState.getFromBoolean(Boolean.parseBoolean(arguments.get(5)));
+        }
+        return addCondition(name, lineNumber, stringToMatch, executeRegEx, ignoreCase, ignoreColor, sender);
+    }
+
+    /**
+     * Uses the given input to add a paid sign condition
+     *
+     * @param name          <p>The name of the paid sign to add the condition to</p>
+     * @param lineNumber    <p>The sign line the condition should check</p>
+     * @param stringToMatch <p>The string to look for on created signs</p>
+     * @param executeRegEx  <p>Whether to treat the match string as a regular expression</p>
+     * @param ignoreCase    <p>Whether to ignore case when matching</p>
+     * @param ignoreColor   <p>Whether to ignore color when matching</p>
+     * @param sender        <p>The command sender to notify when finished</p>
+     * @return <p>True if the condition was successfully added</p>
+     */
+    private boolean addCondition(String name, short lineNumber, String stringToMatch, boolean executeRegEx,
+                                 OptionState ignoreCase, OptionState ignoreColor, CommandSender sender) {
+        PaidSignManager signManager = PaidSigns.getInstance().getSignManager();
+        PaidSign sign = signManager.getPaidSign(name);
+        if (sign == null) {
+            PaidSigns.getStringFormatter().displayErrorMessage(sender, PaidSignsTranslatableMessage.ERROR_PAID_SIGN_NOT_FOUND);
+            return false;
+        }
+        sign.addCondition(lineNumber, stringToMatch, executeRegEx, ignoreCase, ignoreColor);
+        try {
+            signManager.saveSigns();
+        } catch (IOException e) {
+            PaidSigns.getStringFormatter().displayErrorMessage(sender, PaidSignsTranslatableMessage.ERROR_EXCEPTION_OCCURRED);
+            return false;
+        }
+        PaidSigns.getStringFormatter().displaySuccessMessage(sender, PaidSignsTranslatableMessage.SUCCESS_ADDED_PAID_SIGN_CONDITION);
+        return true;
+    }
+
+}

src/main/java/net/knarcraft/paidsigns/command/AddConditionTabCompleter.java

@@ -0,0 +1,57 @@
+package net.knarcraft.paidsigns.command;
+
+import net.knarcraft.knarlib.util.TabCompletionHelper;
+import net.knarcraft.paidsigns.utility.PaidSignsTabCompleteHelper;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * The tab completer for the add paid sign condition command
+ */
+public class AddConditionTabCompleter extends TokenizedTabCompleter {
+
+    private List<String> lineIndices;
+    private List<String> stringsToMatch;
+    private List<String> booleans;
+    private List<String> optionStates;
+
+    @Nullable
+    @Override
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias,
+                                      @NotNull String[] args) {
+        super.onTabComplete(sender, command, alias, args);
+        if (lineIndices == null) {
+            initializeValues();
+        }
+        if (argumentSize == 1) {
+            return TabCompletionHelper.filterMatchingStartsWith(PaidSignsTabCompleteHelper.getPaidSignNames(), arguments.get(0));
+        } else if (argumentSize == 2) {
+            return TabCompletionHelper.filterMatchingStartsWith(this.lineIndices, arguments.get(1));
+        } else if (argumentSize == 3) {
+            return TabCompletionHelper.filterMatchingStartsWith(stringsToMatch, arguments.get(2));
+        } else if (argumentSize == 4) {
+            return TabCompletionHelper.filterMatchingStartsWith(booleans, arguments.get(3));
+        } else if (argumentSize == 5) {
+            return TabCompletionHelper.filterMatchingStartsWith(optionStates, arguments.get(4));
+        } else if (argumentSize == 6) {
+            return TabCompletionHelper.filterMatchingStartsWith(optionStates, arguments.get(5));
+        }
+        return new ArrayList<>();
+    }
+
+    /**
+     * Initializes the values available for tab completion
+     */
+    private void initializeValues() {
+        lineIndices = PaidSignsTabCompleteHelper.getSignLines();
+        stringsToMatch = PaidSignsTabCompleteHelper.getExampleConditionStrings();
+        booleans = PaidSignsTabCompleteHelper.getBooleans();
+        optionStates = PaidSignsTabCompleteHelper.getOptionStates();
+    }
+
+}

src/main/java/net/knarcraft/paidsigns/command/AddTabCompleter.java

@@ -1,9 +1,9 @@
 package net.knarcraft.paidsigns.command;
 
-import net.knarcraft.paidsigns.utility.Tokenizer;
+import net.knarcraft.knarlib.util.TabCompletionHelper;
+import net.knarcraft.paidsigns.utility.PaidSignsTabCompleteHelper;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
-import org.bukkit.command.TabCompleter;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -13,30 +13,34 @@ import java.util.List;
 /**
  * The tab completer for the add paid sign command
  */
-public class AddTabCompleter implements TabCompleter {
+public class AddTabCompleter extends TokenizedTabCompleter {
 
-    private static List<String> ids;
+    private static List<String> names;
-    private static List<String> lines;
     private static List<String> costs;
     private static List<String> options;
+    private static List<String> booleans;
 
     @Nullable
     @Override
     public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias,
                                       @NotNull String[] args) {
-        if (ids == null) {
+        super.onTabComplete(sender, command, alias, args);
+        if (names == null) {
             initializeValues();
         }
-        List<String> arguments = Tokenizer.tokenize(String.join(" ", args));
 
-        if (arguments.size() < 1) {
+        if (argumentSize == 1) {
-            return ids;
+            return TabCompletionHelper.filterMatchingStartsWith(names, arguments.get(0));
-        } else if (arguments.size() < 2) {
+        } else if (argumentSize == 2) {
-            return lines;
+            return TabCompletionHelper.filterMatchingStartsWith(costs, arguments.get(1));
-        } else if (arguments.size() < 3) {
+        } else if (argumentSize == 3) {
-            return costs;
+            return PaidSignsTabCompleteHelper.tabCompletePermission(arguments.get(arguments.size() - 1));
-        } else if (arguments.size() < 5) {
+        } else if (argumentSize == 4) {
-            return options;
+            return TabCompletionHelper.filterMatchingStartsWith(options, arguments.get(3));
+        } else if (argumentSize == 5) {
+            return TabCompletionHelper.filterMatchingStartsWith(options, arguments.get(4));
+        } else if (argumentSize == 6) {
+            return TabCompletionHelper.filterMatchingStartsWith(booleans, arguments.get(5));
         }
         return new ArrayList<>();
     }
@@ -45,27 +49,10 @@ public class AddTabCompleter implements TabCompleter {
      * Initializes the values available for tab completion
      */
     private static void initializeValues() {
-        ids = new ArrayList<>();
+        names = PaidSignsTabCompleteHelper.getExamplePaidSignNames();
-        ids.add("[Gate]");
+        costs = PaidSignsTabCompleteHelper.getCosts();
-        ids.add("\"[Lift Up]\"");
+        options = PaidSignsTabCompleteHelper.getOptionStates();
-        ids.add("\"[Lift Down]\"");
+        booleans = PaidSignsTabCompleteHelper.getBooleans();
-
-        lines = new ArrayList<>();
-        lines.add("1");
-        lines.add("2");
-        lines.add("3");
-        lines.add("4");
-
-        costs = new ArrayList<>();
-        costs.add("1");
-        costs.add("5");
-        costs.add("10");
-        costs.add("15");
-
-        options = new ArrayList<>();
-        options.add("default");
-        options.add("true");
-        options.add("false");
     }
 
 }

src/main/java/net/knarcraft/paidsigns/command/EditCommand.java

@@ -0,0 +1,182 @@
+package net.knarcraft.paidsigns.command;
+
+import net.knarcraft.paidsigns.PaidSigns;
+import net.knarcraft.paidsigns.container.PaidSign;
+import net.knarcraft.paidsigns.container.PaidSignCondition;
+import net.knarcraft.paidsigns.formatting.PaidSignsTranslatableMessage;
+import net.knarcraft.paidsigns.manager.PaidSignManager;
+import net.knarcraft.paidsigns.property.OptionState;
+import net.knarcraft.paidsigns.property.PaidSignConditionProperty;
+import net.knarcraft.paidsigns.property.PaidSignProperty;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
+
+import java.io.IOException;
+import java.util.Map;
+
+/**
+ * A representation of the command for editing a new paid sign
+ */
+public class EditCommand extends TokenizedCommand {
+
+    @Override
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label,
+                             @NotNull String[] args) {
+        super.onCommand(sender, command, label, args);
+        if (argumentSize < 3) {
+            return false;
+        }
+
+        PaidSign sign = PaidSigns.getInstance().getSignManager().getPaidSign(arguments.get(0));
+        if (sign == null) {
+            PaidSigns.getStringFormatter().displayErrorMessage(sender, PaidSignsTranslatableMessage.ERROR_PAID_SIGN_NOT_FOUND);
+            return false;
+        }
+
+        try {
+            try {
+                //First, assume a condition is changed
+                return parseGivenConditionLine(sign, sender);
+            } catch (NumberFormatException exception) {
+                //Fall back to assume a sign is changed
+                return parseGivenProperty(sign, sender);
+            }
+        } catch (IOException e) {
+            PaidSigns.getStringFormatter().displayErrorMessage(sender, PaidSignsTranslatableMessage.ERROR_EXCEPTION_OCCURRED);
+            return false;
+        }
+    }
+
+    /**
+     * Parses the given condition line and the rest of the input
+     *
+     * @param sign   <p>The paid sign the user is trying to edit</p>
+     * @param sender <p>The command sender to notify of any errors</p>
+     * @return <p>True if the command was executed successfully</p>
+     * @throws NumberFormatException <p>If the given argument is not a number</p>
+     */
+    private boolean parseGivenConditionLine(@NotNull PaidSign sign,
+                                            @NotNull CommandSender sender) throws NumberFormatException {
+        short signLine = (short) (Short.parseShort(arguments.get(1)) - 1);
+        if (signLine < 0 || signLine > 3 || sign.getConditions().get(signLine) == null) {
+            PaidSigns.getStringFormatter().displayErrorMessage(sender, PaidSignsTranslatableMessage.ERROR_NO_SUCH_CONDITION);
+            return false;
+        }
+        if (argumentSize < 4) {
+            return false;
+        }
+
+        PaidSignConditionProperty conditionProperty = PaidSignConditionProperty.getFromString(arguments.get(2));
+        if (conditionProperty == null) {
+            PaidSigns.getStringFormatter().displayErrorMessage(sender, PaidSignsTranslatableMessage.ERROR_PROPERTY_NOT_RECOGNIZED);
+            return false;
+        }
+        String value = arguments.get(3);
+        return updateConditionProperty(sender, sign, signLine, conditionProperty, value);
+    }
+
+    /**
+     * Parses the given paid sign property and the rest of the input
+     *
+     * @param sign   <p>The paid sign the user is trying to edit</p>
+     * @param sender <p>The command sender to notify of any errors</p>
+     * @return <p>True if the command was executed successfully</p>
+     * @throws IOException <p>If unable to remove or save the sign</p>
+     */
+    private boolean parseGivenProperty(@NotNull PaidSign sign,
+                                       @NotNull CommandSender sender) throws IOException {
+        PaidSignProperty property = PaidSignProperty.getFromString(arguments.get(1));
+        if (property == null) {
+            PaidSigns.getStringFormatter().displayErrorMessage(sender, PaidSignsTranslatableMessage.ERROR_PROPERTY_NOT_RECOGNIZED);
+            return false;
+        }
+        String value = arguments.get(2);
+        try {
+            updateProperty(sender, sign, property, value);
+            return true;
+        } catch (NumberFormatException exception) {
+            PaidSigns.getStringFormatter().displayErrorMessage(sender, PaidSignsTranslatableMessage.ERROR_INVALID_NUMBER);
+            return false;
+        }
+    }
+
+    /**
+     * Updates a property for a paid sign
+     *
+     * @param sender   <p>The command sender to notify of any errors or success</p>
+     * @param sign     <p>The sign to be updated</p>
+     * @param property <p>The property to update</p>
+     * @param newValue <p>The new value of the property</p>
+     * @throws IOException <p>If unable to remove or save the sign</p>
+     */
+    private void updateProperty(CommandSender sender, PaidSign sign, PaidSignProperty property,
+                                String newValue) throws IOException {
+        String signName = property == PaidSignProperty.NAME ? newValue : sign.getName();
+        OptionState ignoreCase = property == PaidSignProperty.IGNORE_CASE ? OptionState.fromString(newValue) :
+                OptionState.getFromBoolean(sign.getIgnoreCase());
+        OptionState ignoreColor = property == PaidSignProperty.IGNORE_COLOR ? OptionState.fromString(newValue) :
+                OptionState.getFromBoolean(sign.getIgnoreColor());
+        boolean matchAnyCondition = property == PaidSignProperty.MATCH_ANY_CONDITION ? Boolean.parseBoolean(newValue) :
+                sign.matchAnyCondition();
+        double cost = property == PaidSignProperty.COST ? Double.parseDouble(newValue) : sign.getCost();
+        String permission = property == PaidSignProperty.PERMISSION ? newValue : sign.getPermission();
+        Map<Short, PaidSignCondition> conditions = sign.getConditions();
+
+        PaidSignManager manager = PaidSigns.getInstance().getSignManager();
+        PaidSign updatedSign = new PaidSign(signName, cost, permission, ignoreCase, ignoreColor, matchAnyCondition);
+        for (short line : conditions.keySet()) {
+            PaidSignCondition condition = conditions.get(line);
+            updatedSign.addCondition(line, condition.stringToMatch(), condition.executeRegex(),
+                    OptionState.getFromBoolean(condition.ignoreCase()),
+                    OptionState.getFromBoolean(condition.ignoreColor()));
+        }
+        manager.removePaidSign(sign.getName());
+        manager.addPaidSign(updatedSign);
+
+        PaidSigns.getStringFormatter().displaySuccessMessage(sender, PaidSignsTranslatableMessage.SUCCESS_UPDATED_PAID_SIGN);
+    }
+
+    /**
+     * Updates a property of a condition of a paid sign
+     *
+     * @param sender         <p>The command sender to notify of any errors or success</p>
+     * @param sign           <p>The sign the condition belongs to</p>
+     * @param conditionIndex <p>The line index that identifies the sign condition</p>
+     * @param property       <p>The condition property to update</p>
+     * @param newValue       <p>The new value of the property</p>
+     * @return <p>True if the property was successfully changed</p>
+     */
+    private boolean updateConditionProperty(CommandSender sender, PaidSign sign, short conditionIndex,
+                                            PaidSignConditionProperty property, String newValue) {
+        PaidSignCondition condition = sign.getConditions().get(conditionIndex);
+        String stringToMatch = property == PaidSignConditionProperty.STRING_TO_MATCH ? newValue :
+                condition.stringToMatch();
+        boolean executeRegEx = property == PaidSignConditionProperty.EXECUTE_REG_EX ? Boolean.parseBoolean(newValue) :
+                condition.executeRegex();
+        boolean ignoreCase = property == PaidSignConditionProperty.IGNORE_CASE ? OptionState.getBooleanValue(
+                OptionState.fromString(newValue), sign.getIgnoreCase()) : condition.ignoreCase();
+        boolean ignoreColor = property == PaidSignConditionProperty.IGNORE_COLOR ? OptionState.getBooleanValue(
+                OptionState.fromString(newValue), sign.getIgnoreColor()) : condition.ignoreColor();
+
+        //Make sure to test the regular expression in case anything changed
+        if (executeRegEx && isRegExInvalid(sender, stringToMatch)) {
+            return false;
+        }
+
+        sign.addCondition(conditionIndex, stringToMatch, executeRegEx, OptionState.getFromBoolean(ignoreCase),
+                OptionState.getFromBoolean(ignoreColor));
+
+        try {
+            PaidSigns.getInstance().getSignManager().saveSigns();
+        } catch (IOException e) {
+            PaidSigns.getStringFormatter().displayErrorMessage(sender, PaidSignsTranslatableMessage.ERROR_EXCEPTION_OCCURRED);
+            return false;
+        }
+
+        PaidSigns.getStringFormatter().displaySuccessMessage(sender, PaidSignsTranslatableMessage.SUCCESS_UPDATED_PAID_SIGN_CONDITION);
+        return true;
+    }
+
+}
+

src/main/java/net/knarcraft/paidsigns/command/EditTabCompleter.java

@@ -0,0 +1,177 @@
+package net.knarcraft.paidsigns.command;
+
+import net.knarcraft.knarlib.util.TabCompletionHelper;
+import net.knarcraft.paidsigns.PaidSigns;
+import net.knarcraft.paidsigns.container.PaidSign;
+import net.knarcraft.paidsigns.property.PaidSignConditionProperty;
+import net.knarcraft.paidsigns.property.PaidSignProperty;
+import net.knarcraft.paidsigns.utility.PaidSignsTabCompleteHelper;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * The tab completer for the edit paid sign command
+ */
+public class EditTabCompleter extends TokenizedTabCompleter {
+
+    private static Map<PaidSignProperty, List<String>> propertyExampleValues;
+    private static Map<PaidSignConditionProperty, List<String>> conditionPropertyExampleValues;
+
+    @Nullable
+    @Override
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label,
+                                      @NotNull String[] args) {
+        super.onTabComplete(sender, command, label, args);
+        if (propertyExampleValues == null) {
+            initializePropertyExampleValues();
+            initializeConditionPropertyExampleValues();
+        }
+
+        if (argumentSize == 1) {
+            return TabCompletionHelper.filterMatchingStartsWith(PaidSignsTabCompleteHelper.getPaidSignNames(), arguments.get(0));
+        } else if (argumentSize >= 2) {
+            PaidSign sign = PaidSigns.getInstance().getSignManager().getPaidSign(arguments.get(0));
+            if (sign != null) {
+                return tabCompleteForSign(sign);
+            }
+        }
+        return new ArrayList<>();
+    }
+
+    /**
+     * Returns tab completions for the given, non-null sign
+     *
+     * @param sign <p>The sign to tab complete for</p>
+     * @return <p>The tab complete options to give to users</p>
+     */
+    private List<String> tabCompleteForSign(@NotNull PaidSign sign) {
+        if (argumentSize == 2) {
+            List<String> conditions = getAvailableSignConditions(sign);
+            conditions.addAll(getPaidSignProperties());
+            return TabCompletionHelper.filterMatchingStartsWith(conditions, arguments.get(1));
+        } else if (argumentSize >= 3) {
+            try {
+                return tabCompleteSignLine(sign);
+            } catch (NumberFormatException exception) {
+                if (argumentSize == 3) {
+                    return tabCompleteProperty();
+                }
+            }
+        }
+        return new ArrayList<>();
+    }
+
+    /**
+     * Returns tab completions for the selected sign line
+     *
+     * @param sign <p>The paid sign the line belongs to</p>
+     * @return <p>The tab complete options to give to users</p>
+     */
+    private List<String> tabCompleteSignLine(@NotNull PaidSign sign) {
+        short signLine = (short) (Short.parseShort(arguments.get(1)) - 1);
+        //Refuse to autocomplete if invalid input is given
+        if (signLine < 0 || signLine > 3 || sign.getConditions().get(signLine) == null) {
+            return new ArrayList<>();
+        } else if (argumentSize == 3) {
+            return TabCompletionHelper.filterMatchingStartsWith(getPaidSignConditionProperties(), arguments.get(2));
+        } else if (argumentSize == 4) {
+            PaidSignConditionProperty property = PaidSignConditionProperty.getFromString(arguments.get(2));
+            if (property != null) {
+                return TabCompletionHelper.filterMatchingStartsWith(conditionPropertyExampleValues.get(property),
+                        arguments.get(3));
+            }
+        }
+        return new ArrayList<>();
+    }
+
+    /**
+     * Returns tab completions for the selected property
+     *
+     * @return <p>The tab complete options to give to users</p>
+     */
+    private List<String> tabCompleteProperty() {
+        PaidSignProperty paidSignProperty = PaidSignProperty.getFromString(arguments.get(1));
+        if (paidSignProperty != null) {
+            if (paidSignProperty == PaidSignProperty.PERMISSION) {
+                return PaidSignsTabCompleteHelper.tabCompletePermission(arguments.get(2));
+            } else {
+                return TabCompletionHelper.filterMatchingStartsWith(propertyExampleValues.get(paidSignProperty),
+                        arguments.get(2));
+            }
+        } else {
+            return new ArrayList<>();
+        }
+    }
+
+    /**
+     * Gets all paid sign condition properties
+     *
+     * @return <p>All paid sign condition properties</p>
+     */
+    private List<String> getPaidSignConditionProperties() {
+        List<String> properties = new ArrayList<>();
+        for (PaidSignConditionProperty property : PaidSignConditionProperty.values()) {
+            properties.add(property.getStringRepresentation());
+        }
+        return properties;
+    }
+
+    /**
+     * Gets all paid sign properties
+     *
+     * @return <p>All paid sign properties</p>
+     */
+    private List<String> getPaidSignProperties() {
+        List<String> properties = new ArrayList<>();
+        for (PaidSignProperty property : PaidSignProperty.values()) {
+            properties.add(property.getStringRepresentation());
+        }
+        return properties;
+    }
+
+    /**
+     * Gets all sign conditions available for the given sign
+     *
+     * @param sign <p>The sign to get available sign conditions for</p>
+     * @return <p>The available sign conditions</p>
+     */
+    private List<String> getAvailableSignConditions(PaidSign sign) {
+        List<String> availableConditions = new ArrayList<>();
+        for (Short signLine : sign.getConditions().keySet()) {
+            availableConditions.add(String.valueOf(signLine + 1));
+        }
+        return availableConditions;
+    }
+
+    /**
+     * Initializes the map for paid sign property example tab completions
+     */
+    private void initializePropertyExampleValues() {
+        propertyExampleValues = new HashMap<>();
+        propertyExampleValues.put(PaidSignProperty.COST, PaidSignsTabCompleteHelper.getCosts());
+        propertyExampleValues.put(PaidSignProperty.NAME, PaidSignsTabCompleteHelper.getPaidSignNames());
+        propertyExampleValues.put(PaidSignProperty.IGNORE_CASE, PaidSignsTabCompleteHelper.getOptionStates());
+        propertyExampleValues.put(PaidSignProperty.IGNORE_COLOR, PaidSignsTabCompleteHelper.getOptionStates());
+        propertyExampleValues.put(PaidSignProperty.MATCH_ANY_CONDITION, PaidSignsTabCompleteHelper.getBooleans());
+    }
+
+    /**
+     * Initializes the map for paid sign condition property example tab completions
+     */
+    private void initializeConditionPropertyExampleValues() {
+        conditionPropertyExampleValues = new HashMap<>();
+        conditionPropertyExampleValues.put(PaidSignConditionProperty.STRING_TO_MATCH,
+                PaidSignsTabCompleteHelper.getExampleConditionStrings());
+        conditionPropertyExampleValues.put(PaidSignConditionProperty.IGNORE_COLOR, PaidSignsTabCompleteHelper.getOptionStates());
+        conditionPropertyExampleValues.put(PaidSignConditionProperty.IGNORE_CASE, PaidSignsTabCompleteHelper.getOptionStates());
+        conditionPropertyExampleValues.put(PaidSignConditionProperty.EXECUTE_REG_EX, PaidSignsTabCompleteHelper.getBooleans());
+    }
+
+}

src/main/java/net/knarcraft/paidsigns/command/ListCommand.java

@@ -0,0 +1,179 @@
+package net.knarcraft.paidsigns.command;
+
+import net.knarcraft.knarlib.formatting.StringFormatter;
+import net.knarcraft.paidsigns.PaidSigns;
+import net.knarcraft.paidsigns.container.PaidSign;
+import net.knarcraft.paidsigns.container.PaidSignCondition;
+import net.knarcraft.paidsigns.formatting.PaidSignsTranslatableMessage;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import static net.knarcraft.knarlib.formatting.StringFormatter.replacePlaceholder;
+import static net.knarcraft.knarlib.formatting.StringFormatter.replacePlaceholders;
+
+/**
+ * A representation of the command for listing information about paid signs
+ */
+public class ListCommand extends TokenizedCommand {
+
+    @Override
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label,
+                             @NotNull String[] args) {
+        super.onCommand(sender, command, label, args);
+        if (argumentSize < 1) {
+            displaySigns(sender, 0);
+            return true;
+        } else if (argumentSize < 3) {
+            try {
+                int pageNumber = Integer.parseInt(arguments.get(0)) - 1;
+                displaySigns(sender, pageNumber);
+                return true;
+            } catch (NumberFormatException exception) {
+                return parsePaidSignSelection(sender);
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Displays all available signs
+     *
+     * @param sender     <p>The command sender to display the signs to</p>
+     * @param pageNumber <p>The page of the sign list to display</p>
+     */
+    private void displaySigns(CommandSender sender, int pageNumber) {
+        StringBuilder signs = new StringBuilder();
+        Set<String> signNames = PaidSigns.getInstance().getSignManager().getAllPaidSigns().keySet();
+        List<String> signNameList = new ArrayList<>(signNames);
+        Collections.sort(signNameList);
+        String infoFormat = PaidSigns.getTranslator().getTranslatedMessage(PaidSignsTranslatableMessage.PAID_SIGNS_INFO_FORMAT);
+
+        //Display up to 10 signs per page
+        int signsPerPage = 7;
+        int alreadyDisplayed = pageNumber * signsPerPage;
+        for (int signIndex = alreadyDisplayed; signIndex < alreadyDisplayed + signsPerPage; signIndex++) {
+            if (signIndex >= signNameList.size()) {
+                break;
+            }
+            String signName = signNameList.get(signIndex);
+            signs.append(replacePlaceholder(infoFormat, "{name}", signName));
+        }
+
+        //Display that another page exists, if necessary
+        boolean hasNextPage = alreadyDisplayed + signsPerPage < signNameList.size();
+        String nextPagePrompt = "";
+        if (hasNextPage) {
+            nextPagePrompt = replacePlaceholder(PaidSigns.getTranslator().getTranslatedMessage(
+                    PaidSignsTranslatableMessage.PAID_SIGNS_NEXT_PROMPT), "{nextPage}", String.valueOf((pageNumber + 2)));
+        }
+
+        sender.sendMessage(StringFormatter.replacePlaceholders(PaidSigns.getTranslator().getTranslatedMessage(
+                        PaidSignsTranslatableMessage.PAID_SIGNS_INFO), new String[]{"{signs}", "{nextPagePrompt}"},
+                new String[]{signs.toString(), nextPagePrompt}));
+    }
+
+    /**
+     * Parses the given input and displays the wanted paid-sign information
+     *
+     * @param sender <p>The command sender to display the information to</p>
+     * @return <p>True if successful. False if the input contained errors</p>
+     */
+    private boolean parsePaidSignSelection(CommandSender sender) {
+        PaidSign paidSign = PaidSigns.getInstance().getSignManager().getPaidSign(arguments.get(0));
+        if (paidSign == null) {
+            PaidSigns.getStringFormatter().displayErrorMessage(sender,
+                    PaidSignsTranslatableMessage.ERROR_PAID_SIGN_NOT_FOUND);
+            return false;
+        }
+        if (argumentSize < 2) {
+            displayPaidSign(sender, paidSign);
+        } else {
+            short lineNumber;
+            try {
+                lineNumber = (short) (Short.parseShort(arguments.get(1)) - 1);
+                if (lineNumber < 0 || lineNumber > 3) {
+                    PaidSigns.getStringFormatter().displayErrorMessage(sender,
+                            PaidSignsTranslatableMessage.ERROR_INVALID_NUMBER);
+                    return false;
+                }
+            } catch (NumberFormatException exception) {
+                PaidSigns.getStringFormatter().displayErrorMessage(sender,
+                        PaidSignsTranslatableMessage.ERROR_INVALID_NUMBER);
+                return false;
+            }
+            if (!paidSign.getConditions().containsKey(lineNumber)) {
+                PaidSigns.getStringFormatter().displayErrorMessage(sender,
+                        PaidSigns.getStringFormatter().replacePlaceholder(
+                                PaidSignsTranslatableMessage.ERROR_NO_SUCH_CONDITION, "{line}",
+                                String.valueOf(lineNumber)));
+                return false;
+            }
+            PaidSignCondition condition = paidSign.getConditions().get(lineNumber);
+            displayPaidSignCondition(sender, paidSign.getName(), lineNumber, condition);
+        }
+        return true;
+    }
+
+    /**
+     * Displays information about a paid sign condition
+     *
+     * @param sender    <p>The command sender to display the information to</p>
+     * @param signName  <p>The name of the sign to display the condition for</p>
+     * @param signLine  <p>The line the condition is for</p>
+     * @param condition <p>The condition to display information about</p>
+     */
+    private void displayPaidSignCondition(CommandSender sender, String signName, short signLine,
+                                          PaidSignCondition condition) {
+        sender.sendMessage(PaidSigns.getStringFormatter().replacePlaceholders(
+                PaidSignsTranslatableMessage.PAID_SIGN_CONDITION_INFO, new String[]{"{name}", "{line}", "{match}",
+                        "{regex}", "{case}", "{color}"}, new String[]{signName, String.valueOf(signLine + 1),
+                        condition.stringToMatch(), translateBoolean(condition.executeRegex()),
+                        translateBoolean(condition.ignoreCase()), translateBoolean(condition.ignoreColor())}));
+    }
+
+    /**
+     * Displays information about a paid sign
+     *
+     * @param sender   <p>The command sender to display the information to</p>
+     * @param paidSign <p>The paid sign to display information about</p>
+     */
+    private void displayPaidSign(CommandSender sender, PaidSign paidSign) {
+        Map<Short, PaidSignCondition> signConditions = paidSign.getConditions();
+        StringBuilder conditions = new StringBuilder();
+        for (short lineIndex : signConditions.keySet()) {
+            String format = PaidSigns.getTranslator().getTranslatedMessage(
+                    PaidSignsTranslatableMessage.PAID_SIGN_INFO_CONDITION_FORMAT);
+            conditions.append(StringFormatter.replacePlaceholders(format, new String[]{"{line}", "{condition}"},
+                    new String[]{String.valueOf((lineIndex + 1)), signConditions.get(lineIndex).stringToMatch()}));
+        }
+
+        sender.sendMessage(replacePlaceholders(PaidSigns.getTranslator().getTranslatedMessage(
+                PaidSignsTranslatableMessage.PAID_SIGN_INFO), new String[]{"{name}", "{cost}", "{permission}", "{case}",
+                "{color}", "{any}", "{conditions}"}, new String[]{paidSign.getName(), String.valueOf(paidSign.getCost()),
+                paidSign.getPermission(), translateBoolean(paidSign.getIgnoreCase()),
+                translateBoolean(paidSign.getIgnoreColor()), translateBoolean(paidSign.matchAnyCondition()),
+                conditions.toString()}));
+    }
+
+    /**
+     * Translates the given boolean value
+     *
+     * @param booleanValue <p>The boolean value to translate</p>
+     * @return <p>The translation of the boolean value</p>
+     */
+    public static String translateBoolean(boolean booleanValue) {
+        if (booleanValue) {
+            return PaidSigns.getTranslator().getTranslatedMessage(PaidSignsTranslatableMessage.BOOLEAN_TRUE);
+        } else {
+            return PaidSigns.getTranslator().getTranslatedMessage(PaidSignsTranslatableMessage.BOOLEAN_FALSE);
+        }
+    }
+
+}

src/main/java/net/knarcraft/paidsigns/command/ListTabCompleter.java

@@ -0,0 +1,40 @@
+package net.knarcraft.paidsigns.command;
+
+import net.knarcraft.knarlib.util.TabCompletionHelper;
+import net.knarcraft.paidsigns.PaidSigns;
+import net.knarcraft.paidsigns.container.PaidSign;
+import net.knarcraft.paidsigns.utility.PaidSignsTabCompleteHelper;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * The tab completer for the list paid signs command
+ */
+public class ListTabCompleter extends TokenizedTabCompleter {
+
+    @Nullable
+    @Override
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias,
+                                      @NotNull String[] args) {
+        super.onTabComplete(sender, command, alias, args);
+        if (argumentSize == 1) {
+            return TabCompletionHelper.filterMatchingStartsWith(PaidSignsTabCompleteHelper.getPaidSignNames(), arguments.get(0));
+        } else if (argumentSize == 2) {
+            PaidSign sign = PaidSigns.getInstance().getSignManager().getPaidSign(arguments.get(0));
+            if (sign != null) {
+                List<String> availableConditions = new ArrayList<>();
+                for (Short signLine : sign.getConditions().keySet()) {
+                    availableConditions.add(String.valueOf(signLine + 1));
+                }
+                return TabCompletionHelper.filterMatchingStartsWith(availableConditions, arguments.get(1));
+            }
+        }
+        return new ArrayList<>();
+    }
+
+}

src/main/java/net/knarcraft/paidsigns/command/PaidSignsTabCommand.java

@@ -0,0 +1,81 @@
+package net.knarcraft.paidsigns.command;
+
+import net.knarcraft.paidsigns.PaidSigns;
+import org.bukkit.ChatColor;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.bukkit.command.PluginCommand;
+import org.bukkit.command.TabExecutor;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class PaidSignsTabCommand implements TabExecutor {
+
+    private static final ChatColor successColor = ChatColor.GREEN;
+    private static final ChatColor commandColor = ChatColor.YELLOW;
+
+    @Override
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, @NotNull String[] args) {
+        sender.sendMessage(commandColor + "[] denote optional parameters");
+        sender.sendMessage(commandColor + "<> denote required parameters");
+        sender.sendMessage(commandColor + "{} denote required permission");
+        sender.sendMessage(commandColor + "In some cases, commands with required parameters can be called with no parameters");
+        if (sender instanceof Player) {
+            showPlayerCommands(sender);
+        }
+        return true;
+    }
+
+    /**
+     * Shows all commands available to the sending player
+     *
+     * @param sender <p>The player which sent the command</p>
+     */
+    private void showPlayerCommands(CommandSender sender) {
+        sender.sendMessage(commandColor + "Commands:");
+
+        showCommandInfo("addPaidSign", sender);
+        showCommandInfo("addPaidSignCondition", sender);
+        showCommandInfo("listPaidSigns", sender);
+        showCommandInfo("editPaidSign", sender);
+        showCommandInfo("removePaidSignCondition", sender);
+        showCommandInfo("removePaidSign", sender);
+        showCommandInfo("reload", sender);
+    }
+
+    /**
+     * Shows information about the given command
+     *
+     * @param command <p>The command to get information about</p>
+     * @param sender  <p>The sender asking to see command info</p>
+     */
+    private void showCommandInfo(String command, CommandSender sender) {
+        PluginCommand pluginCommand = PaidSigns.getInstance().getCommand(command);
+        if (pluginCommand != null) {
+            String permission = pluginCommand.getPermission();
+            if (permission == null || sender.hasPermission(permission)) {
+                String commandInfo = "\n" + commandColor + pluginCommand.getUsage().replace("<command>",
+                        pluginCommand.getName()) + ": " + successColor + pluginCommand.getDescription();
+                if (sender.hasPermission("paidsigns.admin")) {
+                    if (permission == null) {
+                        permission = "None";
+                    }
+                    commandInfo += commandColor + " {" + permission + "}";
+                }
+                sender.sendMessage(commandInfo);
+            }
+        }
+    }
+
+    @Nullable
+    @Override
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label,
+                                      @NotNull String[] args) {
+        return new ArrayList<>();
+    }
+
+}

src/main/java/net/knarcraft/paidsigns/command/ReloadTabCommand.java

@@ -1,6 +1,7 @@
 package net.knarcraft.paidsigns.command;
 
 import net.knarcraft.paidsigns.PaidSigns;
+import net.knarcraft.paidsigns.formatting.PaidSignsTranslatableMessage;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
@@ -18,7 +19,8 @@ public class ReloadTabCommand implements TabExecutor {
     public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label,
                              @NotNull String[] args) {
         PaidSigns.getInstance().reload();
-        return false;
+        PaidSigns.getStringFormatter().displaySuccessMessage(sender, PaidSignsTranslatableMessage.SUCCESS_RELOADED);
+        return true;
     }
 
     @Override

src/main/java/net/knarcraft/paidsigns/command/RemoveCommand.java

@@ -1,55 +0,0 @@
-package net.knarcraft.paidsigns.command;
-
-import net.knarcraft.paidsigns.PaidSigns;
-import net.knarcraft.paidsigns.utility.Tokenizer;
-import org.apache.commons.lang.ArrayUtils;
-import org.bukkit.command.Command;
-import org.bukkit.command.CommandExecutor;
-import org.bukkit.command.CommandSender;
-import org.jetbrains.annotations.NotNull;
-
-import java.io.IOException;
-import java.util.Arrays;
-import java.util.List;
-import java.util.logging.Level;
-import java.util.logging.Logger;
-
-/**
- * A representation of the command for removing a paid sign
- */
-public class RemoveCommand implements CommandExecutor {
-
-    @Override
-    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label,
-                             @NotNull String[] args) {
-        if (args.length < 1) {
-            return false;
-        }
-        List<String> arguments = Tokenizer.tokenize(String.join(" ", args));
-        String[] input = arguments.get(0).split("\\|");
-        short line;
-        try {
-            line = (short) (Short.parseShort(input[0]) - 1);
-        } catch (NumberFormatException exception) {
-            sender.sendMessage("Invalid line number given");
-            return false;
-        }
-        String id = String.join("|", (String[]) ArrayUtils.remove(input, 0));
-        try {
-            if (PaidSigns.getInstance().getSignManager().removePaidSign(id, line)) {
-                sender.sendMessage("Successfully removed paid sign");
-            } else {
-                sender.sendMessage("No matching paid sign was found");
-            }
-            return true;
-        } catch (IOException e) {
-            Logger logger = PaidSigns.getInstance().getLogger();
-            logger.log(Level.SEVERE, "Exception encountered while trying to write " +
-                    "to the data file");
-            logger.log(Level.SEVERE, Arrays.toString(e.getStackTrace()));
-            sender.sendMessage("An exception occurred. Please notify the server administrator or check the server log.");
-        }
-        return false;
-    }
-
-}

src/main/java/net/knarcraft/paidsigns/command/RemoveConditionCommand.java

@@ -0,0 +1,64 @@
+package net.knarcraft.paidsigns.command;
+
+import net.knarcraft.paidsigns.PaidSigns;
+import net.knarcraft.paidsigns.container.PaidSign;
+import net.knarcraft.paidsigns.formatting.PaidSignsTranslatableMessage;
+import net.knarcraft.paidsigns.manager.PaidSignManager;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
+
+import java.io.IOException;
+
+/**
+ * A representation of the command for removing a condition from a sign
+ */
+public class RemoveConditionCommand extends TokenizedCommand {
+
+    @Override
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label,
+                             @NotNull String[] args) {
+        super.onCommand(sender, command, label, args);
+        if (argumentSize < 2) {
+            return false;
+        }
+
+        String name = arguments.get(0);
+        short lineNumber;
+        try {
+            lineNumber = (short) (Short.parseShort(arguments.get(1)) - 1);
+            if (lineNumber < 0 || lineNumber > 3) {
+                PaidSigns.getStringFormatter().displayErrorMessage(sender, PaidSignsTranslatableMessage.ERROR_INVALID_NUMBER);
+                return false;
+            }
+        } catch (NumberFormatException exception) {
+            PaidSigns.getStringFormatter().displayErrorMessage(sender, PaidSignsTranslatableMessage.ERROR_INVALID_NUMBER);
+            return false;
+        }
+        PaidSignManager signManager = PaidSigns.getInstance().getSignManager();
+        PaidSign sign = signManager.getPaidSign(name);
+        if (sign == null) {
+            PaidSigns.getStringFormatter().displayErrorMessage(sender,
+                    PaidSignsTranslatableMessage.ERROR_PAID_SIGN_NOT_FOUND);
+            return false;
+        }
+
+        if (!sign.getConditions().containsKey(lineNumber)) {
+            PaidSigns.getStringFormatter().displayErrorMessage(sender, PaidSigns.getStringFormatter().replacePlaceholder(
+                    PaidSignsTranslatableMessage.ERROR_NO_SUCH_CONDITION, "{line}",
+                    String.valueOf((lineNumber + 1))));
+            return false;
+        }
+
+        sign.removeCondition(lineNumber);
+        try {
+            signManager.saveSigns();
+        } catch (IOException e) {
+            PaidSigns.getStringFormatter().displayErrorMessage(sender, PaidSignsTranslatableMessage.ERROR_EXCEPTION_OCCURRED);
+            return false;
+        }
+        PaidSigns.getStringFormatter().displaySuccessMessage(sender, PaidSignsTranslatableMessage.SUCCESS_REMOVED_CONDITION);
+        return true;
+    }
+
+}

src/main/java/net/knarcraft/paidsigns/command/RemoveConditionTabCompleter.java

@@ -0,0 +1,53 @@
+package net.knarcraft.paidsigns.command;
+
+import net.knarcraft.knarlib.util.TabCompletionHelper;
+import net.knarcraft.paidsigns.PaidSigns;
+import net.knarcraft.paidsigns.container.PaidSign;
+import net.knarcraft.paidsigns.utility.PaidSignsTabCompleteHelper;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * The tab completer for the remove paid sign condition command
+ */
+public class RemoveConditionTabCompleter extends TokenizedTabCompleter {
+
+    private List<String> lineIndices;
+
+    @Nullable
+    @Override
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias,
+                                      @NotNull String[] args) {
+        super.onTabComplete(sender, command, alias, args);
+        if (lineIndices == null) {
+            initializeValues();
+        }
+
+        if (argumentSize == 1) {
+            return TabCompletionHelper.filterMatchingStartsWith(PaidSignsTabCompleteHelper.getPaidSignNames(), arguments.get(0));
+        } else if (argumentSize == 2) {
+            PaidSign sign = PaidSigns.getInstance().getSignManager().getPaidSign(arguments.get(0));
+            if (sign != null) {
+                List<String> availableConditions = new ArrayList<>();
+                for (Short signLine : sign.getConditions().keySet()) {
+                    availableConditions.add(String.valueOf(signLine + 1));
+                }
+                return TabCompletionHelper.filterMatchingStartsWith(availableConditions, arguments.get(1));
+            }
+        }
+        return new ArrayList<>();
+    }
+
+    /**
+     * Initializes the values available for tab completion
+     */
+    private void initializeValues() {
+        lineIndices = PaidSignsTabCompleteHelper.getSignLines();
+    }
+
+}

src/main/java/net/knarcraft/paidsigns/command/RemoveTabCommand.java

@@ -0,0 +1,61 @@
+package net.knarcraft.paidsigns.command;
+
+import net.knarcraft.paidsigns.PaidSigns;
+import net.knarcraft.paidsigns.formatting.PaidSignsTranslatableMessage;
+import net.knarcraft.paidsigns.utility.PaidSignsTabCompleteHelper;
+import net.knarcraft.paidsigns.utility.Tokenizer;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.bukkit.command.TabExecutor;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * A representation of the command for removing a paid sign
+ */
+public class RemoveTabCommand implements TabExecutor {
+
+    @Override
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label,
+                             @NotNull String[] args) {
+        List<String> arguments = Tokenizer.tokenize(String.join(" ", args));
+        if (arguments.size() < 1) {
+            return false;
+        }
+        String name = arguments.get(0);
+
+        try {
+            if (PaidSigns.getInstance().getSignManager().removePaidSign(name)) {
+                PaidSigns.getStringFormatter().displaySuccessMessage(sender,
+                        PaidSignsTranslatableMessage.SUCCESS_REMOVED_PAID_SIGN);
+            } else {
+                PaidSigns.getStringFormatter().displaySuccessMessage(sender,
+                        PaidSignsTranslatableMessage.ERROR_PAID_SIGN_NOT_FOUND);
+            }
+            return true;
+        } catch (IOException e) {
+            PaidSigns.getStringFormatter().displayErrorMessage(sender,
+                    PaidSignsTranslatableMessage.ERROR_EXCEPTION_OCCURRED);
+        }
+        return false;
+    }
+
+    @Nullable
+    @Override
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias,
+                                      @NotNull String[] args) {
+        List<String> arguments = Tokenizer.tokenize(String.join(" ", args));
+        int argumentSize = args[args.length - 1].isEmpty() ? arguments.size() : arguments.size() - 1;
+
+        if (argumentSize < 1) {
+            return PaidSignsTabCompleteHelper.getPaidSignNames();
+        } else {
+            return new ArrayList<>();
+        }
+    }
+
+}

src/main/java/net/knarcraft/paidsigns/command/RemoveTabCompleter.java

@@ -1,31 +0,0 @@
-package net.knarcraft.paidsigns.command;
-
-import net.knarcraft.paidsigns.PaidSigns;
-import net.knarcraft.paidsigns.container.PaidSign;
-import org.bukkit.command.Command;
-import org.bukkit.command.CommandSender;
-import org.bukkit.command.TabCompleter;
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
-
-import java.util.ArrayList;
-import java.util.List;
-
-/**
- * The tab completer for the remove command
- */
-public class RemoveTabCompleter implements TabCompleter {
-
-    @Nullable
-    @Override
-    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias,
-                                      @NotNull String[] args) {
-        List<PaidSign> allPaidSigns = PaidSigns.getInstance().getSignManager().getAllPaidSigns();
-        List<String> signIds = new ArrayList<>();
-        for (PaidSign sign : allPaidSigns) {
-            signIds.add("\"" + (sign.getLineIndex() + 1) + "|" + sign.getId() + "\"");
-        }
-        return signIds;
-    }
-
-}

src/main/java/net/knarcraft/paidsigns/command/TokenizedCommand.java

@@ -0,0 +1,48 @@
+package net.knarcraft.paidsigns.command;
+
+import net.knarcraft.paidsigns.PaidSigns;
+import net.knarcraft.paidsigns.formatting.PaidSignsTranslatableMessage;
+import net.knarcraft.paidsigns.utility.Tokenizer;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandExecutor;
+import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.List;
+import java.util.regex.Pattern;
+import java.util.regex.PatternSyntaxException;
+
+/**
+ * A command executor with tokenized arguments
+ */
+public class TokenizedCommand implements CommandExecutor {
+
+    protected List<String> arguments;
+    protected int argumentSize;
+
+    @Override
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, @NotNull String[] args) {
+        arguments = Tokenizer.tokenize(String.join(" ", args));
+        argumentSize = arguments.size();
+        return true;
+    }
+
+    /**
+     * Tests whether the given regular expression is valid
+     *
+     * @param sender            <p>The command sender to notify if the regular expression is invalid</p>
+     * @param regularExpression <p>The regular expression to test</p>
+     * @return <p>True if the regular expression is invalid</p>
+     */
+    protected boolean isRegExInvalid(CommandSender sender, String regularExpression) {
+        try {
+            Pattern.compile(regularExpression);
+            return false;
+        } catch (PatternSyntaxException exception) {
+            PaidSigns.getStringFormatter().displayErrorMessage(sender,
+                    PaidSignsTranslatableMessage.ERROR_INVALID_REGULAR_EXPRESSION);
+            return true;
+        }
+    }
+
+}

src/main/java/net/knarcraft/paidsigns/command/TokenizedTabCompleter.java

@@ -0,0 +1,36 @@
+package net.knarcraft.paidsigns.command;
+
+import net.knarcraft.paidsigns.utility.Tokenizer;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.bukkit.command.TabCompleter;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.List;
+
+/**
+ * A tab completer with tokenized arguments
+ */
+public class TokenizedTabCompleter implements TabCompleter {
+
+    protected List<String> arguments;
+    protected int argumentSize;
+
+    @Nullable
+    @Override
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias,
+                                      @NotNull String[] args) {
+        arguments = Tokenizer.tokenize(String.join(" ", args));
+        if (args.length == 0) {
+            argumentSize = 0;
+        } else {
+            if (args[args.length - 1].isEmpty()) {
+                arguments.add("");
+            }
+            argumentSize = arguments.size();
+        }
+        return null;
+    }
+
+}

src/main/java/net/knarcraft/paidsigns/container/PaidSign.java

@@ -2,58 +2,59 @@ package net.knarcraft.paidsigns.container;
 
 import net.knarcraft.paidsigns.PaidSigns;
 import net.knarcraft.paidsigns.property.OptionState;
-import net.knarcraft.paidsigns.utility.ColorHelper;
+
-import net.md_5.bungee.api.ChatColor;
+import java.util.HashMap;
+import java.util.Map;
 
 /**
  * A representation of a paid sign
  */
 public class PaidSign {
 
-    private final String id;
+    private final String name;
-    private final String cleanId;
-    private final short lineIndex;
     private final double cost;
+    private final String permission;
     private final OptionState ignoreCase;
     private final OptionState ignoreColor;
+    private final boolean matchAnyCondition;
+    private final Map<Short, PaidSignCondition> conditions = new HashMap<>();
 
     /**
      * Instantiates a new paid sign
      *
-     * @param id          <p>The string that identifies this type of paid sign</p>
+     * @param name              <p>A recognizable, unique, name used to identify this paid sign</p>
-     * @param lineIndex   <p>The line the id has to be on to trigger payment</p>
      * @param cost              <p>The cost of creating this paid sign</p>
+     * @param permission        <p>The permission required to create the sign this paid sign matches</p>
      * @param ignoreCase        <p>Whether to ignore case when looking for this permission sign</p>
      * @param ignoreColor       <p>Whether to ignore color when looking for this permission sign</p>
+     * @param matchAnyCondition <p>Whether to treat a match for any condition as a sign match</p>
      */
-    public PaidSign(String id, short lineIndex, double cost, OptionState ignoreCase, OptionState ignoreColor) {
+    public PaidSign(String name, double cost, String permission, OptionState ignoreCase, OptionState ignoreColor,
-        if (id == null || id.trim().isBlank()) {
+                    boolean matchAnyCondition) {
-            throw new IllegalArgumentException("Id cannot be empty");
+        if (name == null || name.trim().isBlank()) {
+            throw new IllegalArgumentException("Name cannot be empty");
         }
         if (cost <= 0) {
             throw new IllegalArgumentException("Cost must be larger than 0");
         }
-        if (lineIndex < 0 || lineIndex > 3) {
-            throw new IllegalArgumentException("Sign line must be between 0 and 3");
-        }
         if (ignoreCase == null || ignoreColor == null) {
             throw new IllegalArgumentException("Ignore case and ignore color options cannot be null");
         }
-        this.id = id;
+        this.name = name;
-        this.lineIndex = lineIndex;
         this.cost = cost;
+        this.permission = permission;
         this.ignoreCase = ignoreCase;
         this.ignoreColor = ignoreColor;
-        this.cleanId = getCleanString(id);
+        this.matchAnyCondition = matchAnyCondition;
     }
 
     /**
-     * Gets the id string of this paid sign
+     * Gets the name identifying this paid sign
      *
-     * @return <p>The id string of this paid sign</p>
+     * @return <p>The name identifying this paid sign</p>
      */
-    public String getId() {
+    public String getName() {
-        return id;
+        return name;
     }
 
     /**
@@ -66,66 +67,21 @@ public class PaidSign {
     }
 
     /**
-     * Gets the line on the sign the id must be on to trigger payment
+     * Gets the permission required by a player to create the sign this paid sign matches
      *
-     * @return <p>The sign line to search for the id</p>
+     * @return <p>The permission required by a player to create the sign this paid sign matches</p>
      */
-    public short getLineIndex() {
+    public String getPermission() {
-        return lineIndex;
+        return this.permission;
     }
 
     /**
-     * Gets the clean id of this paid sign
+     * Gets all conditions registered for this paid sign
      *
-     * @return <p>The clean id of this paid sign</p>
+     * @return <p>All conditions registered for this paid sign</p>
      */
-    public String getCleanId() {
+    public Map<Short, PaidSignCondition> getConditions() {
-        return cleanId;
+        return new HashMap<>(this.conditions);
-    }
-
-    /**
-     * Gets the "clean" version of the given string
-     *
-     * <p>The "cleaning" removes color codes and lower-cases the string.</p>
-     *
-     * @param string <p>The string to clean</p>
-     * @return <p>The cleaned string</p>
-     */
-    public static String getCleanString(String string) {
-        return ChatColor.stripColor(ColorHelper.translateAllColorCodes(string.toLowerCase()));
-    }
-
-    /**
-     * Checks whether this paid sign matches the given line
-     *
-     * @param lineNumber <p>The line number of the given line</p>
-     * @param line       <p>The line to compare against this paid sign's id</p>
-     * @return <p>True if the line matches this sign</p>
-     */
-    public boolean matches(short lineNumber, String line) {
-        if (lineNumber != this.lineIndex) {
-            return false;
-        }
-        String idCopy = id;
-        if (getIgnoreCase()) {
-            idCopy = idCopy.toLowerCase();
-            line = line.toLowerCase();
-        }
-        if (getIgnoreColor()) {
-            idCopy = ColorHelper.stripColorCodes(idCopy);
-            line = ColorHelper.stripColorCodes(line);
-        }
-        return idCopy.equals(line);
-    }
-
-    /**
-     * Checks whether this paid sign matches another paid sign
-     *
-     * @param paidSign <p>The other paid sign to compare to</p>
-     * @return <p>True if the signs match</p>
-     */
-    public boolean matches(PaidSign paidSign) {
-        return matches(paidSign.lineIndex, paidSign.id);
     }
 
     /**
@@ -134,11 +90,7 @@ public class PaidSign {
      * @return <p>Whether the text case should be ignored for this paid sign</p>
      */
     public boolean getIgnoreCase() {
-        if (this.ignoreCase == OptionState.DEFAULT) {
+        return OptionState.getBooleanValue(this.ignoreCase, PaidSigns.getInstance().ignoreCase());
-            return PaidSigns.getInstance().ignoreCase();
-        } else {
-            return OptionState.getBooleanValue(this.ignoreCase);
-        }
     }
 
     /**
@@ -147,11 +99,73 @@ public class PaidSign {
      * @return <p>Whether the text color should be ignored for this paid sign</p>
      */
     public boolean getIgnoreColor() {
-        if (this.ignoreColor == OptionState.DEFAULT) {
+        return OptionState.getBooleanValue(this.ignoreColor, PaidSigns.getInstance().ignoreColor());
-            return PaidSigns.getInstance().ignoreColor();
-        } else {
-            return OptionState.getBooleanValue(this.ignoreColor);
     }
+
+    /**
+     * Gets whether to treat a match for any condition as a sign match
+     *
+     * @return <p>Whether to treat a match for any condition as a sign match</p>
+     */
+    public boolean matchAnyCondition() {
+        return this.matchAnyCondition;
+    }
+
+    /**
+     * Checks whether this paid sign matches the given set of sign lines
+     *
+     * @param lines <p>The sign lines to test against</p>
+     * @return <p>True if this paid sign matches the given lines</p>
+     */
+    public boolean matches(String[] lines) {
+        //Make sure a paid sign without a condition never matches anything
+        if (this.conditions.isEmpty()) {
+            return false;
+        }
+        boolean matchAny = matchAnyCondition();
+        boolean success = !matchAny;
+        for (short i = 0; i < 4; i++) {
+            PaidSignCondition condition = this.conditions.get(i);
+            if (condition != null) {
+                boolean conditionMatches = condition.test(lines[i]);
+                if (matchAny) {
+                    success |= conditionMatches;
+                } else {
+                    success &= conditionMatches;
+                }
+
+            }
+        }
+        return success;
+    }
+
+    /**
+     * Adds a condition to this paid sign
+     *
+     * @param line          <p>The line on the sign the matched text must be on</p>
+     * @param stringToMatch <p>The string that should be matched for the new condition to be true</p>
+     * @param executeRegex  <p>Whether to execute the string as RegEx</p>
+     * @param ignoreCase    <p>Whether to ignore case when matching against the condition</p>
+     * @param ignoreColor   <p>Whether to ignore color when matching against the condition</p>
+     */
+    public void addCondition(short line, String stringToMatch, boolean executeRegex, OptionState ignoreCase,
+                             OptionState ignoreColor) {
+        if (line < 0 || line > 3) {
+            throw new IllegalArgumentException("Invalid sign line given for new paid sign condition");
+        }
+        boolean ignoreCaseBoolean = OptionState.getBooleanValue(ignoreCase, this.getIgnoreCase());
+        boolean ignoreColorBoolean = OptionState.getBooleanValue(ignoreColor, this.getIgnoreColor());
+        this.conditions.put(line, new PaidSignCondition(stringToMatch, executeRegex, ignoreCaseBoolean,
+                ignoreColorBoolean));
+    }
+
+    /**
+     * Removes a condition from this paid sign
+     *
+     * @param line <p>The sign line the condition belongs to</p>
+     */
+    public void removeCondition(short line) {
+        this.conditions.remove(line);
     }
 
 }

src/main/java/net/knarcraft/paidsigns/container/PaidSignCondition.java

@@ -0,0 +1,47 @@
+package net.knarcraft.paidsigns.container;
+
+import net.knarcraft.knarlib.property.ColorConversion;
+import net.knarcraft.knarlib.util.ColorHelper;
+
+/**
+ * A condition for deciding if a paid sign matches a sign line
+ *
+ * @param stringToMatch <p>The string/regular expression the line has to match to fulfill this condition</p>
+ * @param executeRegex  <p>Whether to execute the match string as a regular expression</p>
+ * @param ignoreCase    <p>Whether to ignore uppercase/lowercase when comparing against this condition</p>
+ * @param ignoreColor   <p>Whether to ignore color codes when comparing against this condition</p>
+ */
+public record PaidSignCondition(String stringToMatch, boolean executeRegex, boolean ignoreCase,
+                                boolean ignoreColor) {
+
+    /**
+     * Tests whether the given line matches this condition
+     *
+     * @param line <p>The sign line to test</p>
+     * @return <p>True if this condition matches the given line</p>
+     */
+    public boolean test(String line) {
+        String stringToMatch = this.stringToMatch;
+        //Strip color codes if they shouldn't matter
+        if (this.ignoreColor) {
+            stringToMatch = ColorHelper.stripColorCodes(stringToMatch, ColorConversion.NORMAL);
+            line = ColorHelper.stripColorCodes(line, ColorConversion.NORMAL);
+        }
+        if (this.executeRegex) {
+            //Match using RegEx
+            if (this.ignoreCase) {
+                return line.matches("(?i)" + stringToMatch);
+            } else {
+                return line.matches(stringToMatch);
+            }
+        } else {
+            //Match regularly
+            if (this.ignoreCase) {
+                return stringToMatch.equalsIgnoreCase(line);
+            } else {
+                return stringToMatch.equals(line);
+            }
+        }
+    }
+
+}

src/main/java/net/knarcraft/paidsigns/container/PaidSignConditionMatch.java

@@ -0,0 +1,19 @@
+package net.knarcraft.paidsigns.container;
+
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * A container class for number of condition matches for a paid sign
+ *
+ * @param paidSign         <p>The paid sign this class keeps track of matches for</p>
+ * @param conditionMatches <p>The number of conditions matched for the paid sign</p>
+ */
+public record PaidSignConditionMatch(PaidSign paidSign,
+                                     int conditionMatches) implements Comparable<PaidSignConditionMatch> {
+
+    @Override
+    public int compareTo(@NotNull PaidSignConditionMatch other) {
+        return Integer.compare(this.conditionMatches, other.conditionMatches);
+    }
+
+}

src/main/java/net/knarcraft/paidsigns/container/TrackedSign.java

@@ -0,0 +1,45 @@
+package net.knarcraft.paidsigns.container;
+
+import org.bukkit.block.sign.Side;
+
+import java.util.UUID;
+
+/**
+ * A representation of a sign placed by a player that matched a paid sign
+ *
+ * @param playerId  <p>The unique id of the player that created the sign</p>
+ * @param frontCost <p>The cost the player paid for creating the front of the sign</p>
+ * @param backCost  <p>The cost the player paid for creating the back of the sign</p>
+ */
+public record TrackedSign(UUID playerId, double frontCost, double backCost) {
+
+    /**
+     * Gets an instance of a tracked sign
+     *
+     * @param playerId <p>The unique id of the player that created the sign</p>
+     * @param side     <p>The side the player paid for</p>
+     * @param cost     <p>The cost the player paid for creating the side of the sign</p>
+     * @return <p>A tracked sign instance</p>
+     */
+    public static TrackedSign getInstance(UUID playerId, Side side, double cost) {
+        if (side == Side.FRONT) {
+            return new TrackedSign(playerId, cost, 0);
+        } else {
+            return new TrackedSign(playerId, 0, cost);
+        }
+    }
+
+    /**
+     * Gets the cost paid for the given side
+     *
+     * @param side <p>The side to check the cost for</p>
+     * @return <p>The cost the player paid</p>
+     */
+    public double getCost(Side side) {
+        return switch (side) {
+            case FRONT -> frontCost;
+            case BACK -> backCost;
+        };
+    }
+
+}

src/main/java/net/knarcraft/paidsigns/formatting/PaidSignsTranslatableMessage.java

@@ -0,0 +1,145 @@
+package net.knarcraft.paidsigns.formatting;
+
+import net.knarcraft.knarlib.formatting.TranslatableMessage;
+
+/**
+ * An enum representing all translatable messages
+ */
+public enum PaidSignsTranslatableMessage implements TranslatableMessage {
+
+    /**
+     * The message to display when a paid sign is successfully added
+     */
+    SUCCESS_ADDED_PAID_SIGN,
+
+    /**
+     * The message to display when a paid sign condition is successfully added
+     */
+    SUCCESS_ADDED_PAID_SIGN_CONDITION,
+
+    /**
+     * The message to display when a paid sign is successfully updated
+     */
+    SUCCESS_UPDATED_PAID_SIGN,
+
+    /**
+     * The message to display when a paid sign condition is successfully updated
+     */
+    SUCCESS_UPDATED_PAID_SIGN_CONDITION,
+
+    /**
+     * The message to display when a paid sign has been successfully removed
+     */
+    SUCCESS_REMOVED_PAID_SIGN,
+
+    /**
+     * The message to display when a paid sign condition has been successfully removed
+     */
+    SUCCESS_REMOVED_CONDITION,
+
+    /**
+     * The message to display after the plugin has been reloaded
+     */
+    SUCCESS_RELOADED,
+
+    /**
+     * The message to display when a player has been charged for creating a paid sign
+     */
+    SUCCESS_PAID_FOR_SIGN,
+
+    /**
+     * The message to display when a player has been refunded for breaking a sign
+     */
+    SUCCESS_REFUNDED,
+
+    /**
+     * The info text used to display all paid signs
+     */
+    PAID_SIGNS_INFO,
+
+    /**
+     * The format used for displaying a paid sign's name
+     */
+    PAID_SIGNS_INFO_FORMAT,
+
+    /**
+     * The prompt displayed when the paid sign list has more items
+     */
+    PAID_SIGNS_NEXT_PROMPT,
+
+    /**
+     * The info text used to display information about a paid sign
+     */
+    PAID_SIGN_INFO,
+
+    /**
+     * The info text used to display information about a paid sign condition
+     */
+    PAID_SIGN_CONDITION_INFO,
+
+    /**
+     * The format used for displaying one of a paid sign's conditions
+     */
+    PAID_SIGN_INFO_CONDITION_FORMAT,
+
+    /**
+     * The message to display for a true boolean value
+     */
+    BOOLEAN_TRUE,
+
+    /**
+     * The message to display for a false boolean value
+     */
+    BOOLEAN_FALSE,
+
+    /**
+     * The error to display when a command argument contains an invalid number
+     */
+    ERROR_INVALID_NUMBER,
+
+    /**
+     * The error to display if a paid sign name duplicate is encountered
+     */
+    ERROR_NAME_DUPLICATE,
+
+    /**
+     * The error to display if a severe exception occurs
+     */
+    ERROR_EXCEPTION_OCCURRED,
+
+    /**
+     * The error to display if some input is invalid
+     */
+    ERROR_INVALID_INPUT,
+
+    /**
+     * The error to display if a specified paid sign is not found
+     */
+    ERROR_PAID_SIGN_NOT_FOUND,
+
+    /**
+     * The error to display if a paid sign condition is specified, but does not exist
+     */
+    ERROR_NO_SUCH_CONDITION,
+
+    /**
+     * The error to display if a player cannot pay for a sign matching a paid sign
+     */
+    ERROR_CANNOT_AFFORD,
+
+    /**
+     * The error to display if an invalid regular expression is provided
+     */
+    ERROR_INVALID_REGULAR_EXPRESSION,
+
+    /**
+     * The error to display if an invalid property is given to the edit command
+     */
+    ERROR_PROPERTY_NOT_RECOGNIZED,
+    ;
+
+    @Override
+    public TranslatableMessage[] getAllMessages() {
+        return PaidSignsTranslatableMessage.values();
+    }
+}

src/main/java/net/knarcraft/paidsigns/listener/SignBreakListener.java

@@ -0,0 +1,103 @@
+package net.knarcraft.paidsigns.listener;
+
+import net.knarcraft.paidsigns.PaidSigns;
+import net.knarcraft.paidsigns.manager.TrackedSignManager;
+import net.knarcraft.paidsigns.utility.SignHelper;
+import org.bukkit.block.Block;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.block.BlockBreakEvent;
+import org.bukkit.event.block.BlockExplodeEvent;
+import org.bukkit.event.block.BlockPistonExtendEvent;
+import org.bukkit.event.block.BlockPistonRetractEvent;
+import org.bukkit.event.entity.EntityChangeBlockEvent;
+import org.bukkit.event.entity.EntityExplodeEvent;
+
+import java.io.IOException;
+import java.util.List;
+
+/**
+ * A listener that listens for any tracked signs being broken
+ */
+public class SignBreakListener implements Listener {
+
+    @EventHandler(priority = EventPriority.MONITOR)
+    public void onBlockBreak(BlockBreakEvent event) {
+        if (event.isCancelled()) {
+            return;
+        }
+        removeTrackedSign(event.getBlock(), true);
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR)
+    public void onExplosion(BlockExplodeEvent event) {
+        if (event.isCancelled()) {
+            return;
+        }
+        removeTrackedSigns(event.blockList());
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR)
+    public void onEntityExplosion(EntityExplodeEvent event) {
+        if (event.isCancelled()) {
+            return;
+        }
+        removeTrackedSigns(event.blockList());
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR)
+    public void onPistonPush(BlockPistonExtendEvent event) {
+        if (event.isCancelled()) {
+            return;
+        }
+        removeTrackedSigns(event.getBlocks());
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR)
+    public void onPistonPull(BlockPistonRetractEvent event) {
+        if (event.isCancelled()) {
+            return;
+        }
+        removeTrackedSigns(event.getBlocks());
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR)
+    public void onEntityBlockChange(EntityChangeBlockEvent event) {
+        if (event.isCancelled()) {
+            return;
+        }
+        if (event.getEntity() instanceof Player) {
+            return;
+        }
+        removeTrackedSign(event.getBlock(), PaidSigns.getInstance().refundAlways());
+    }
+
+    /**
+     * Removes all tracked signs from the given blocks
+     *
+     * @param blocks <p>The blocks to search for tracked signs</p>
+     */
+    private void removeTrackedSigns(List<Block> blocks) {
+        for (Block block : blocks) {
+            removeTrackedSign(block, PaidSigns.getInstance().refundAlways());
+        }
+    }
+
+    /**
+     * Tries to remove any tracked sign at the given block
+     *
+     * @param block  <p>The block that might be a sign</p>
+     * @param refund <p>Whether to perform a refund after un-tracking the sign</p>
+     */
+    private void removeTrackedSign(Block block, boolean refund) {
+        if (SignHelper.isSign(block)) {
+            try {
+                TrackedSignManager.removeTrackedSign(block.getLocation(), refund, false);
+            } catch (IOException ignored) {
+            }
+        }
+    }
+
+}

src/main/java/net/knarcraft/paidsigns/listener/SignListener.java

@@ -1,69 +1,185 @@
 package net.knarcraft.paidsigns.listener;
 
+import net.knarcraft.knarlib.formatting.TranslatableMessage;
 import net.knarcraft.paidsigns.PaidSigns;
 import net.knarcraft.paidsigns.container.PaidSign;
+import net.knarcraft.paidsigns.container.PaidSignConditionMatch;
+import net.knarcraft.paidsigns.formatting.PaidSignsTranslatableMessage;
 import net.knarcraft.paidsigns.manager.EconomyManager;
-import net.knarcraft.paidsigns.manager.PaidSignManager;
+import net.knarcraft.paidsigns.manager.TrackedSignManager;
+import net.knarcraft.paidsigns.utility.SignHelper;
+import org.bukkit.Bukkit;
+import org.bukkit.Location;
+import org.bukkit.block.Block;
 import org.bukkit.entity.Player;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.EventPriority;
 import org.bukkit.event.Listener;
 import org.bukkit.event.block.SignChangeEvent;
 
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
+import java.util.Map;
+import java.util.logging.Level;
 
 /**
  * A listener for listening to registered paid signs
  */
 public class SignListener implements Listener {
 
-    @EventHandler(priority = EventPriority.MONITOR)
+    @EventHandler(priority = EventPriority.LOW)
     public void onSignChange(SignChangeEvent event) {
         if (event.isCancelled() || event.getPlayer().hasPermission("paidsigns.paymentexempt")) {
             return;
         }
 
-        String[] lines = event.getLines();
+        // As signs can be edited now, this event might be triggered on an already registered sign, so unregister
-        PaidSignManager signManager = PaidSigns.getInstance().getSignManager();
+        if (SignHelper.isSign(event.getBlock())) {
-        for (short lineIndex = 0; lineIndex < lines.length; lineIndex++) {
+            try {
-            //Get all "weak" matches (any paid sign with a clean id matching the clean line)
+                TrackedSignManager.removeTrackedSign(event.getBlock().getLocation(), true, false,
-            List<PaidSign> matchingSigns = signManager.getPaidSigns(PaidSign.getCleanString(lines[lineIndex]), lineIndex);
+                        event.getSide());
-            if (matchingSigns.isEmpty()) {
+            } catch (IOException ignored) {
-                continue;
             }
-            if (testMatchingSigns(lineIndex, lines[lineIndex], matchingSigns, event)) {
+        }
+
+        String[] lines = event.getLines();
+        Map<String, PaidSign> allPaidSigns = PaidSigns.getInstance().getSignManager().getAllPaidSigns();
+
+        //Generate the sorted list of the number of paid sign conditions matched for every paid sign
+        List<PaidSignConditionMatch> allConditionMatches = new ArrayList<>();
+        for (PaidSign paidSign : allPaidSigns.values()) {
+            calculateConditionMatches(paidSign, lines, allConditionMatches);
+        }
+        allConditionMatches.sort(Collections.reverseOrder());
+
+        //Make the player pay for the paid sign
+        PaidSign mostExpensive = getMatchingSign(allConditionMatches);
+        if (mostExpensive != null) {
+            performPaidSignCheck(mostExpensive, event);
+        }
+    }
+
+    /**
+     * Gets the most specific paid sign match
+     *
+     * <p>This method chooses the most specific match, if any. If two matches have the same number of matched
+     * conditions, it will choose the most expensive one.</p>
+     *
+     * @param allConditionMatches <p>A sorted list of all paid sign condition matches</p>
+     * @return <p>The best matching paid sign, or null if no paid sign matches</p>
+     */
+    private PaidSign getMatchingSign(List<PaidSignConditionMatch> allConditionMatches) {
+        PaidSign mostExpensive = null;
+        int bestMatch = 1;
+        for (PaidSignConditionMatch paidSignConditionMatch : allConditionMatches) {
+            int conditionMatches = paidSignConditionMatch.conditionMatches();
+            /* Stop if there is no matching paid signs. Also stop if a paid sign is encountered with fewer conditions 
+            matching */
+            if (conditionMatches >= bestMatch) {
+                PaidSign paidSign = paidSignConditionMatch.paidSign();
+                //Choose the most expensive paid sign between those with the same number of matched conditions
+                if (mostExpensive == null || paidSign.getCost() > mostExpensive.getCost()) {
+                    mostExpensive = paidSign;
+                    bestMatch = conditionMatches;
+                }
+            } else {
+                break;
+            }
+        }
+        return mostExpensive;
+    }
+
+    /**
+     * Calculates the number of conditions matching for the given paid sign
+     *
+     * <p>This calculates the number of matches, allowing the most specific paid sign to be chosen</p>
+     *
+     * @param paidSign            <p>The paid sign to calculate matches for</p>
+     * @param lines               <p>The lines of a sign</p>
+     * @param allConditionMatches <p>The number of conditions matched</p>
+     */
+    private void calculateConditionMatches(PaidSign paidSign, String[] lines, List<PaidSignConditionMatch> allConditionMatches) {
+        if (paidSign.matches(lines)) {
+            if (paidSign.matchAnyCondition()) {
+                //For any match, it can only be assumed one lines matches
+                allConditionMatches.add(new PaidSignConditionMatch(paidSign, 1));
+            } else {
+                //For a normal match, the number of conditions is equal to the number of matches
+                allConditionMatches.add(new PaidSignConditionMatch(paidSign, paidSign.getConditions().size()));
+            }
+        } else {
+            allConditionMatches.add(new PaidSignConditionMatch(paidSign, 0));
+        }
+    }
+
+    /**
+     * Performs necessary checks and performs the paid sign transaction
+     *
+     * @param paidSign <p>The paid sign to test against the sign lines</p>
+     * @param event    <p>The triggered sign change event to cancel if necessary</p>
+     */
+    private void performPaidSignCheck(PaidSign paidSign, SignChangeEvent event) {
+        Player player = event.getPlayer();
+        String permission = paidSign.getPermission();
+        //If a match is found, but the player is missing the permission, assume no plugin sign was created
+        if (permission != null && !permission.trim().isEmpty() && !player.hasPermission(permission)) {
             return;
         }
+
+        performPaidSignTransaction(paidSign, player, event);
+        Location signLocation = event.getBlock().getLocation();
+
+        if (!event.isCancelled()) {
+            //Immediately refund if a plugin destroyed the sign within 5 ticks of the creation
+            Bukkit.getScheduler().scheduleSyncDelayedTask(PaidSigns.getInstance(), () -> {
+                Block block = signLocation.getBlock();
+                if (!SignHelper.isSign(block)) {
+                    try {
+                        TrackedSignManager.removeTrackedSign(block.getLocation(), true, true);
+                    } catch (IOException e) {
+                        PaidSigns.getInstance().getLogger().log(Level.WARNING, String.format("Unable to save changes " +
+                                "about removed tracked sign at %s", block.getLocation()));
+                    }
+                }
+            }, 5);
+        }
+    }
+
+    /**
+     * Performs the transaction to pay for the paid sign
+     *
+     * @param paidSign <p>The paid sign a match has been found for</p>
+     * @param player   <p>The player that created the sign</p>
+     * @param event    <p>The sign change event that caused the sign to be created</p>
+     */
+    private void performPaidSignTransaction(PaidSign paidSign, Player player, SignChangeEvent event) {
+        double cost = paidSign.getCost();
+        boolean canAfford = EconomyManager.canAfford(player, cost);
+        if (!canAfford) {
+            PaidSigns.getStringFormatter().displayErrorMessage(player, replaceCost(cost, PaidSignsTranslatableMessage.ERROR_CANNOT_AFFORD));
+            event.setCancelled(true);
+        } else {
+            EconomyManager.withdraw(player, cost);
+            PaidSigns.getStringFormatter().displaySuccessMessage(player, replaceCost(cost, PaidSignsTranslatableMessage.SUCCESS_PAID_FOR_SIGN));
+            try {
+                TrackedSignManager.addTrackedSign(event.getBlock().getLocation(), player.getUniqueId(), cost, event.getSide());
+            } catch (IOException ignored) {
+            }
         }
     }
 
     /**
-     * Tests all weak matches of paid signs to check if a strong match is found
+     * Replaces cost and unit placeholders in the given message
      *
-     * @param lineIndex     <p>The index of the currently managed line</p>
+     * @param cost    <p>The cost to insert</p>
-     * @param line          <p>The text on the currently managed line</p>
+     * @param message <p>The original message to replace the cost placeholder for</p>
-     * @param matchingSigns <p>The signs that weakly match the </p>
+     * @return <p>The message with the cost instead of the cost placeholder</p>
-     * @param event         <p>The triggered sign change event</p>
-     * @return <p>True if a match was found and thw work is finished</p>
      */
-    private boolean testMatchingSigns(short lineIndex, String line, List<PaidSign> matchingSigns, SignChangeEvent event) {
+    private String replaceCost(double cost, TranslatableMessage message) {
-        for (PaidSign paidSign : matchingSigns) {
+        return PaidSigns.getStringFormatter().replacePlaceholder(message,
-            if (paidSign.matches(lineIndex, line)) {
+                "{cost}", EconomyManager.format(cost));
-                Player player = event.getPlayer();
-                double cost = paidSign.getCost();
-                boolean canAfford = EconomyManager.canAfford(player, cost);
-                if (!canAfford) {
-                    player.sendMessage("[PaidSigns] You cannot afford to create this sign");
-                    event.setCancelled(true);
-                } else {
-                    String unit = EconomyManager.getCurrency(cost != 1);
-                    player.sendMessage(String.format("[PaidSigns] You paid %.2f %s to create the sign", cost, unit));
-                    EconomyManager.withdraw(player, cost);
-                }
-                return true;
-            }
-        }
-        return false;
     }
 
 }

src/main/java/net/knarcraft/paidsigns/manager/EconomyManager.java

@@ -2,7 +2,6 @@ package net.knarcraft.paidsigns.manager;
 
 import net.milkbowl.vault.economy.Economy;
 import org.bukkit.OfflinePlayer;
-import org.bukkit.entity.Player;
 
 /**
  * A manager that performs all Economy tasks
@@ -36,17 +35,13 @@ public final class EconomyManager {
     }
 
     /**
-     * Gets the name of the used currency
+     * Formats the given amount of currency according to the economy plugin's format
      *
-     * @param plural <p>Whether to get the plural name or the singular name</p>
+     * @param amount <p>The amount of currency to format</p>
-     * @return <p>The name of the used currency</p>
+     * @return <p>The formatted string</p>
      */
-    public static String getCurrency(boolean plural) {
+    public static String format(double amount) {
-        if (plural) {
+        return economy.format(amount);
-            return economy.currencyNamePlural();
-        } else {
-            return economy.currencyNameSingular();
-        }
     }
 
     /**
@@ -55,8 +50,18 @@ public final class EconomyManager {
      * @param player <p>The player to withdraw money from</p>
      * @param cost   <p>The amount of money to withdraw</p>
      */
-    public static void withdraw(Player player, double cost) {
+    public static void withdraw(OfflinePlayer player, double cost) {
         economy.withdrawPlayer(player, cost);
     }
 
+    /**
+     * Deposits a given sum into the given player's account
+     *
+     * @param player <p>The player to deposit money to</p>
+     * @param sum    <p>The amount of money to deposit</p>
+     */
+    public static void deposit(OfflinePlayer player, double sum) {
+        economy.depositPlayer(player, sum);
+    }
+
 }

src/main/java/net/knarcraft/paidsigns/manager/PaidSignManager.java

@@ -2,32 +2,33 @@ package net.knarcraft.paidsigns.manager;
 
 import net.knarcraft.paidsigns.PaidSigns;
 import net.knarcraft.paidsigns.container.PaidSign;
+import net.knarcraft.paidsigns.container.PaidSignCondition;
 import net.knarcraft.paidsigns.property.OptionState;
 import org.bukkit.configuration.ConfigurationSection;
 import org.bukkit.configuration.file.YamlConfiguration;
 
 import java.io.File;
 import java.io.IOException;
-import java.util.ArrayList;
+import java.util.Arrays;
-import java.util.List;
+import java.util.HashMap;
-import java.util.function.Predicate;
+import java.util.Map;
 import java.util.logging.Level;
+import java.util.logging.Logger;
 
 /**
  * A manager that keeps track of all registered paid signs
  */
 public final class PaidSignManager {
 
-    private final List<PaidSign> paidSigns;
+    private final Map<String, PaidSign> paidSigns;
     private static final File signsFile = new File(PaidSigns.getInstance().getDataFolder(), "data.yml");
-    private static final String signLineIdSeparator = "-,_,-";
 
     /**
      * Instantiate a new paid sign manager
      *
      * @param paidSigns <p>The paid signs this manager should manage</p>
      */
-    public PaidSignManager(List<PaidSign> paidSigns) {
+    public PaidSignManager(Map<String, PaidSign> paidSigns) {
         this.paidSigns = paidSigns;
     }
 
@@ -38,36 +39,35 @@ public final class PaidSignManager {
      * @throws IOException <p>If unable to write to the signs file</p>
      */
     public void addPaidSign(PaidSign paidSign) throws IOException {
-        this.paidSigns.add(paidSign);
+        this.paidSigns.put(paidSign.getName(), paidSign);
-        saveSigns(this.paidSigns);
+        saveSigns();
     }
 
     /**
      * Removes a paid sign from this paid sign manager
      *
-     * @param id   <p>The identifier for the paid sign to remove</p>
+     * @param name <p>The name of the paid sign to remove</p>
-     * @param line <p>The line the identifier has to match to be valid</p>
      * @return <p>True if a sign was removed</p>
      * @throws IOException <p>If unable to write to the signs file</p>
      */
-    public boolean removePaidSign(String id, short line) throws IOException {
+    public boolean removePaidSign(String name) throws IOException {
-        boolean removed = this.paidSigns.removeIf((sign) -> sign.getId().equals(id) && sign.getLineIndex() == line);
+        boolean removed = this.paidSigns.remove(name) != null;
         if (!removed) {
             return false;
-        }
+        } else {
-        saveSigns(this.paidSigns);
+            saveSigns();
             return true;
         }
+    }
 
     /**
-     * Gets the paid signs that match the given properties
+     * Gets the paid sign with the given name
      *
-     * @param cleanId <p>The clean id to search for</p>
+     * @param name <p>The paid sign with the given name</p>
-     * @param line    <p>The line number to search for</p>
+     * @return <p>The paid sign with the given name, or null if it does not exist</p>
-     * @return <p>The paid signs that matched the given properties</p>
      */
-    public List<PaidSign> getPaidSigns(String cleanId, short line) {
+    public PaidSign getPaidSign(String name) {
-        return filterPaidSigns(filterPaidSigns(paidSigns, line), cleanId);
+        return paidSigns.get(name);
     }
 
     /**
@@ -75,19 +75,8 @@ public final class PaidSignManager {
      *
      * @return <p>All registered paid signs</p>
      */
-    public List<PaidSign> getAllPaidSigns() {
+    public Map<String, PaidSign> getAllPaidSigns() {
-        return new ArrayList<>(paidSigns);
+        return new HashMap<>(paidSigns);
-    }
-
-    /**
-     * Filters a list of paid signs to match the given line number
-     *
-     * @param paidSigns <p>The list of paid signs to start with</p>
-     * @param line      <p>The line number to filter by</p>
-     * @return <p>The filtered list of paid signs</p>
-     */
-    private static List<PaidSign> filterPaidSigns(List<PaidSign> paidSigns, short line) {
-        return filterPaidSigns(paidSigns, (paidSign) -> paidSign.getLineIndex() == line);
     }
 
     /**
@@ -95,66 +84,105 @@ public final class PaidSignManager {
      *
      * @return <p>The loaded paid signs</p>
      */
-    public static List<PaidSign> loadSigns() {
+    public static Map<String, PaidSign> loadSigns() {
         YamlConfiguration configuration = YamlConfiguration.loadConfiguration(signsFile);
         ConfigurationSection signSection = configuration.getConfigurationSection("paidSigns");
         if (signSection == null) {
-            PaidSigns.getInstance().getLogger().log(Level.WARNING, "Signs section not found in data.yml");
+            PaidSigns.getInstance().getLogger().log(Level.INFO, "Signs section not found in data.yml");
-            return new ArrayList<>();
+            return new HashMap<>();
         }
 
-        List<PaidSign> paidSigns = new ArrayList<>();
+        Map<String, PaidSign> paidSigns = new HashMap<>();
-        for (String combinedId : signSection.getKeys(false)) {
+        for (String name : signSection.getKeys(false)) {
-            String[] idParts = combinedId.split(signLineIdSeparator);
+            double cost = signSection.getDouble(name + ".cost");
-            short lineNumber = Short.parseShort(idParts[0]);
+            String permission = signSection.getString(name + ".permission");
-            String id = idParts[1];
+            OptionState ignoreCase = OptionState.getFromBoolean(signSection.getBoolean(name + ".ignoreCase"));
-            double cost = signSection.getDouble(combinedId + ".cost");
+            OptionState ignoreColor = OptionState.getFromBoolean(signSection.getBoolean(name + ".ignoreColor"));
-            OptionState ignoreCase = OptionState.getFromBoolean(signSection.getBoolean(combinedId + ".ignoreCase"));
+            boolean matchAnyCondition = signSection.getBoolean(name + ".matchAnyCondition");
-            OptionState ignoreColor = OptionState.getFromBoolean(signSection.getBoolean(combinedId + ".ignoreColor"));
+            PaidSign sign = new PaidSign(name, cost, permission, ignoreCase, ignoreColor, matchAnyCondition);
-            paidSigns.add(new PaidSign(id, lineNumber, cost, ignoreCase, ignoreColor));
+            loadConditions(signSection, sign);
+            paidSigns.put(name, sign);
         }
         return paidSigns;
     }
 
+    /**
+     * Saves all signs registered to this paid sign manager
+     *
+     * @throws IOException <p>If unable to write to the signs file</p>
+     */
+    public void saveSigns() throws IOException {
+        saveSigns(this.paidSigns);
+    }
+
     /**
      * Saves the given paid signs to the signs file
      *
      * @param signs <p>The signs to save</p>
      * @throws IOException <p>If unable to write to the signs file</p>
      */
-    public static void saveSigns(List<PaidSign> signs) throws IOException {
+    public static void saveSigns(Map<String, PaidSign> signs) throws IOException {
+        try {
             YamlConfiguration configuration = YamlConfiguration.loadConfiguration(signsFile);
             ConfigurationSection signSection = configuration.createSection("paidSigns");
 
-        for (PaidSign sign : signs) {
+            for (PaidSign sign : signs.values()) {
-            String signId = sign.getLineIndex() + signLineIdSeparator + sign.getId();
+                saveSign(signSection, sign);
-            signSection.set(signId + ".cost", sign.getCost());
-            signSection.set(signId + ".ignoreCase", sign.getIgnoreCase());
-            signSection.set(signId + ".ignoreColor", sign.getIgnoreColor());
             }
             configuration.save(signsFile);
+        } catch (IOException exception) {
+            Logger logger = PaidSigns.getInstance().getLogger();
+            logger.log(Level.SEVERE, "Exception encountered while trying to write " +
+                    "to the data file");
+            logger.log(Level.SEVERE, Arrays.toString(exception.getStackTrace()));
+            throw exception;
+        }
     }
 
     /**
-     * Filters a list of paid signs to match the given clean id
+     * Saves the given sign to the given configuration section
      *
-     * @param paidSigns <p>The list of paid signs to start with</p>
+     * @param signSection <p>The configuration section to save the sign to</p>
-     * @param cleanId   <p>The clean id to filter by</p>
+     * @param sign        <p>The sign to save</p>
-     * @return <p>The filtered list of paid signs</p>
      */
-    private static List<PaidSign> filterPaidSigns(List<PaidSign> paidSigns, String cleanId) {
+    private static void saveSign(ConfigurationSection signSection, PaidSign sign) {
-        return filterPaidSigns(paidSigns, (paidSign) -> paidSign.getCleanId().equals(cleanId));
+        String name = sign.getName();
+        signSection.set(name + ".cost", sign.getCost());
+        signSection.set(name + ".permission", sign.getPermission());
+        signSection.set(name + ".ignoreCase", sign.getIgnoreCase());
+        signSection.set(name + ".ignoreColor", sign.getIgnoreColor());
+        signSection.set(name + ".matchAnyCondition", sign.matchAnyCondition());
+        ConfigurationSection conditionsSection = signSection.createSection(name + ".conditions");
+        Map<Short, PaidSignCondition> signConditions = sign.getConditions();
+        for (short lineIndex : signConditions.keySet()) {
+            PaidSignCondition condition = signConditions.get(lineIndex);
+            conditionsSection.set(lineIndex + ".stringToMatch", condition.stringToMatch());
+            conditionsSection.set(lineIndex + ".executeRegEx", condition.executeRegex());
+            conditionsSection.set(lineIndex + ".ignoreCase", condition.ignoreCase());
+            conditionsSection.set(lineIndex + ".ignoreColor", condition.ignoreColor());
+        }
     }
 
     /**
-     * Filters a list of paid signs using the given predicate
+     * Loads any saved paid sign conditions and applies them to the given sign
      *
-     * @param paidSigns <p>The list of paid signs to start with</p>
+     * @param signSection <p>The configuration section containing sign information</p>
-     * @param predicate <p>The predicate used to filter paid signs</p>
+     * @param sign        <p>The sign to load conditions for</p>
-     * @return <p>The filtered list of paid signs</p>
      */
-    private static List<PaidSign> filterPaidSigns(List<PaidSign> paidSigns, Predicate<PaidSign> predicate) {
+    private static void loadConditions(ConfigurationSection signSection, PaidSign sign) {
-        return new ArrayList<>(paidSigns).stream().filter(predicate).toList();
+        ConfigurationSection conditionSection = signSection.getConfigurationSection(sign.getName() + ".conditions");
+        if (conditionSection != null) {
+            for (String lineIndex : conditionSection.getKeys(false)) {
+                short lineNumber = Short.parseShort(lineIndex);
+                String stringToMatch = conditionSection.getString(lineIndex + ".stringToMatch");
+                boolean executeRegEx = conditionSection.getBoolean(lineIndex + ".executeRegEx");
+                boolean ignoreConditionCase = conditionSection.getBoolean(lineIndex + ".ignoreCase");
+                boolean ignoreConditionColor = conditionSection.getBoolean(lineIndex + ".ignoreColor");
+                sign.addCondition(lineNumber, stringToMatch, executeRegEx,
+                        OptionState.getFromBoolean(ignoreConditionCase),
+                        OptionState.getFromBoolean(ignoreConditionColor));
+            }
+        }
     }
 
 }

src/main/java/net/knarcraft/paidsigns/manager/TrackedSignManager.java

@@ -0,0 +1,260 @@
+package net.knarcraft.paidsigns.manager;
+
+import net.knarcraft.paidsigns.PaidSigns;
+import net.knarcraft.paidsigns.container.TrackedSign;
+import net.knarcraft.paidsigns.formatting.PaidSignsTranslatableMessage;
+import net.knarcraft.paidsigns.utility.SignHelper;
+import org.bukkit.Bukkit;
+import org.bukkit.Location;
+import org.bukkit.OfflinePlayer;
+import org.bukkit.block.sign.Side;
+import org.bukkit.configuration.ConfigurationSection;
+import org.bukkit.configuration.file.YamlConfiguration;
+import org.bukkit.entity.Player;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Objects;
+import java.util.UUID;
+import java.util.logging.Level;
+
+/**
+ * A manager for keeping track of plugin-signs created by players
+ */
+public final class TrackedSignManager {
+
+    private static Map<Location, TrackedSign> trackedSigns = new HashMap<>();
+    private static final File signsFile = new File(PaidSigns.getInstance().getDataFolder(), "data.yml");
+
+    private TrackedSignManager() {
+
+    }
+
+    /**
+     * Adds a tracked sign to the manager
+     *
+     * @param signLocation <p>The location the sign was created at</p>
+     * @param playerId     <p>The unique id of the player that created the sign</p>
+     * @param cost         <p>The cost the player paid</p>
+     * @param side         <p>The side of the sign the player paid for</p>
+     * @throws IOException <p>If unable to save the tracked signs</p>
+     */
+    public static void addTrackedSign(Location signLocation, UUID playerId, double cost, Side side) throws IOException {
+        if (trackedSigns.containsKey(signLocation)) {
+            // If there is already a tracked sign, overwrite it, while updating only the correct cost
+            TrackedSign oldSign = trackedSigns.get(signLocation);
+            if (side == Side.FRONT) {
+                trackedSigns.put(signLocation, new TrackedSign(playerId, cost, oldSign.backCost()));
+            } else {
+                trackedSigns.put(signLocation, new TrackedSign(playerId, oldSign.frontCost(), cost));
+            }
+        } else {
+            trackedSigns.put(signLocation, TrackedSign.getInstance(playerId, side, cost));
+        }
+        saveTrackedSigns();
+    }
+
+    /**
+     * Removes a tracked sign from the manager
+     *
+     * @param signLocation <p>The location the sign was removed from</p>
+     * @param refund       <p>Whether to perform a refund after un-tracking the sign</p>
+     * @param forceRefund  <p>Whether to force a refund, even if refunding is disabled</p>
+     * @param side         <p>The side of the sign to un-track</p>
+     * @throws IOException <p>If unable to save the tracked signs</p>
+     */
+    public static void removeTrackedSign(Location signLocation, boolean refund, boolean forceRefund,
+                                         Side side) throws IOException {
+        if (!trackedSigns.containsKey(signLocation)) {
+            return;
+        }
+        TrackedSign trackedSign = trackedSigns.get(signLocation);
+
+        Side oppositeSide = getOppositeSide(side);
+        double oppositeCost = trackedSign.getCost(oppositeSide);
+        boolean isInUse = oppositeCost > 0;
+
+        if (!isInUse) {
+            trackedSigns.remove(signLocation);
+        } else {
+            // If the opposite side has a cost, create a new sign with only that cost
+            trackedSigns.put(signLocation, TrackedSign.getInstance(trackedSign.playerId(), oppositeSide, oppositeCost));
+        }
+
+        saveTrackedSigns();
+        if (trackedSign.getCost(side) > 0) {
+            refund(trackedSign, refund, forceRefund, side);
+        }
+    }
+
+    /**
+     * Gets the opposite sign side of the given side
+     *
+     * @param side <p>The side to get the opposite of</p>
+     * @return <p>The opposite sign side</p>
+     */
+    private static Side getOppositeSide(Side side) {
+        if (side == Side.FRONT) {
+            return Side.BACK;
+        } else {
+            return Side.FRONT;
+        }
+    }
+
+    /**
+     * Removes a tracked sign from the manager
+     *
+     * @param signLocation <p>The location the sign was removed from</p>
+     * @param refund       <p>Whether to perform a refund after un-tracking the sign</p>
+     * @param forceRefund  <p>Whether to force a refund, even if refunding is disabled</p>
+     * @throws IOException <p>If unable to save the tracked signs</p>
+     */
+    public static void removeTrackedSign(Location signLocation, boolean refund, boolean forceRefund) throws IOException {
+        if (!trackedSigns.containsKey(signLocation)) {
+            return;
+        }
+        TrackedSign trackedSign = trackedSigns.get(signLocation);
+        trackedSigns.remove(signLocation);
+        saveTrackedSigns();
+        refundBothSides(trackedSign, refund, forceRefund);
+    }
+
+    /**
+     * Loads all tracked signs from the data file
+     */
+    public static void loadTrackedSigns() {
+        YamlConfiguration configuration = YamlConfiguration.loadConfiguration(signsFile);
+        ConfigurationSection signSection = configuration.getConfigurationSection("trackedSigns");
+        trackedSigns = new HashMap<>();
+
+        if (signSection == null) {
+            PaidSigns.getInstance().getLogger().log(Level.INFO, "Tracked signs section not found in data.yml");
+            return;
+        }
+
+        for (String key : signSection.getKeys(false)) {
+            loadSign(signSection, key);
+        }
+
+        //Save tracked signs in case some were invalidated after loading
+        try {
+            TrackedSignManager.saveTrackedSigns();
+        } catch (IOException e) {
+            PaidSigns.getInstance().getLogger().log(Level.WARNING, "Unable to save tracked signs");
+        }
+    }
+
+    /**
+     * Loads a sign from the save file
+     *
+     * @param signSection <p>The configuration section containing signs</p>
+     * @param key         <p>The sign key which is also the sign's location</p>
+     */
+    private static void loadSign(ConfigurationSection signSection, String key) {
+        String[] locationParts = key.split(",");
+        Location signLocation;
+        try {
+            signLocation = new Location(Bukkit.getWorld(UUID.fromString(locationParts[0])),
+                    Double.parseDouble(locationParts[1]), Double.parseDouble(locationParts[2]),
+                    Double.parseDouble(locationParts[3]));
+        } catch (NumberFormatException exception) {
+            PaidSigns.getInstance().getLogger().log(Level.SEVERE, "Unable to load tracked sign " + key + ": " +
+                    exception.getMessage());
+            return;
+        }
+
+        double frontCost;
+        double backCost = 0;
+        if (signSection.contains(key + ".cost")) {
+            // Migrate from single side cost to two side cost
+            frontCost = signSection.getDouble(key + ".cost");
+            signSection.set(key + ".cost", null);
+        } else {
+            frontCost = signSection.getDouble(key + ".frontCost");
+        }
+        if (signSection.contains(key + ".backCost")) {
+            backCost = signSection.getDouble(key + ".backCost");
+        }
+        UUID playerId = UUID.fromString(Objects.requireNonNull(signSection.getString(key + ".playerId")));
+        TrackedSign trackedSign = new TrackedSign(playerId, frontCost, backCost);
+
+        //Prevent destroyed signs from being tracked indefinitely
+        if (!SignHelper.isSign(signLocation.getBlock())) {
+            Bukkit.getScheduler().scheduleSyncDelayedTask(PaidSigns.getInstance(), () -> {
+                PaidSigns.getInstance().getLogger().log(Level.WARNING, "The sign at " + signLocation +
+                        " no longer exists. Removing from sign tracker. Refunding the player.");
+                refundBothSides(trackedSign, true, false);
+            }, 100);
+            return;
+        }
+
+        trackedSigns.put(signLocation, trackedSign);
+    }
+
+    /**
+     * Saves the managed tracked signs to the data file
+     *
+     * @throws IOException <p>If unable to write to the data file</p>
+     */
+    public static void saveTrackedSigns() throws IOException {
+        YamlConfiguration configuration = YamlConfiguration.loadConfiguration(signsFile);
+        ConfigurationSection signSection = configuration.createSection("trackedSigns");
+
+        for (Location signLocation : trackedSigns.keySet()) {
+            TrackedSign sign = trackedSigns.get(signLocation);
+            String locationString = Objects.requireNonNull(signLocation.getWorld()).getUID() + "," +
+                    signLocation.getBlockX() + "," + signLocation.getBlockY() + "," + signLocation.getBlockZ();
+            signSection.set(locationString + ".frontCost", sign.frontCost());
+            signSection.set(locationString + ".backCost", sign.backCost());
+            signSection.set(locationString + ".playerId", sign.playerId().toString());
+        }
+        configuration.save(signsFile);
+    }
+
+    /**
+     * Refunds the player for the sign if refunds are enabled and refund is set to true
+     *
+     * @param trackedSign <p>The tracked sign to refund for</p>
+     * @param refund      <p>Whether to actually refund</p>
+     * @param forceRefund <p>Whether to force a refund, even if refunding is disabled</p>
+     */
+    private static void refund(TrackedSign trackedSign, boolean refund, boolean forceRefund, Side signSide) {
+        if ((!PaidSigns.getInstance().areRefundsEnabled() || !refund) && !forceRefund) {
+            return;
+        }
+        double cost = trackedSign.getCost(signSide);
+        OfflinePlayer offlinePlayer = Bukkit.getOfflinePlayer(trackedSign.playerId());
+        double refundSum;
+        if (forceRefund) {
+            //In the case where a refund is forced, the normal refund rate should not apply
+            refundSum = cost;
+        } else {
+            refundSum = cost / 100 * PaidSigns.getInstance().getRefundPercentage();
+        }
+        EconomyManager.deposit(offlinePlayer, refundSum);
+        if (offlinePlayer instanceof Player player) {
+            PaidSigns.getStringFormatter().displaySuccessMessage(player,
+                    PaidSigns.getStringFormatter().replacePlaceholder(PaidSignsTranslatableMessage.SUCCESS_REFUNDED,
+                            "{cost}", EconomyManager.format(refundSum)));
+        }
+    }
+
+    /**
+     * Refunds the costs for both sides of a paid sign
+     *
+     * @param trackedSign <p>The tracked sign to refund for</p>
+     * @param refund      <p>Whether to perform a refund after un-tracking the sign</p>
+     * @param forceRefund <p>Whether to force a refund, even if refunding is disabled</p>
+     */
+    private static void refundBothSides(TrackedSign trackedSign, boolean refund, boolean forceRefund) {
+        if (trackedSign.frontCost() > 0) {
+            refund(trackedSign, refund, forceRefund, Side.FRONT);
+        }
+        if (trackedSign.backCost() > 0) {
+            refund(trackedSign, refund, forceRefund, Side.BACK);
+        }
+    }
+
+}

src/main/java/net/knarcraft/paidsigns/property/OptionState.java

@@ -24,13 +24,14 @@ public enum OptionState {
      * Gets the boolean value of the given option state if it's boolean compatible
      *
      * @param optionState  <p>The option state to get the boolean from</p>
-     * @return <p>The boolean value, or an illegal argument exception if called on DEFAULT</p>
+     * @param defaultValue <p>The default value to use if the option state is DEFAULT</p>
+     * @return <p>The boolean value</p>
      */
-    public static boolean getBooleanValue(OptionState optionState) {
+    public static boolean getBooleanValue(OptionState optionState, boolean defaultValue) {
         return switch (optionState) {
             case TRUE -> true;
             case FALSE -> false;
-            case DEFAULT -> throw new IllegalArgumentException("No boolean value available for DEFAULT");
+            case DEFAULT -> defaultValue;
         };
     }
 

src/main/java/net/knarcraft/paidsigns/property/PaidSignConditionProperty.java

@@ -0,0 +1,63 @@
+package net.knarcraft.paidsigns.property;
+
+/**
+ * A representation of a paid sign condition's editable properties
+ */
+public enum PaidSignConditionProperty {
+
+    /**
+     * The string used to trigger the paid sign condition
+     */
+    STRING_TO_MATCH("stringToMatch"),
+
+    /**
+     * Whether to execute the match string as a regular expression
+     */
+    EXECUTE_REG_EX("executeRegEx"),
+
+    /**
+     * Whether to ignore case for the sign condition
+     */
+    IGNORE_CASE("ignoreCase"),
+
+    /**
+     * Whether to ignore color for the sign condition
+     */
+    IGNORE_COLOR("ignoreColor");
+
+    private final String stringRepresentation;
+
+    /**
+     * Instantiates a new paid sign condition property
+     *
+     * @param stringRepresentation <p>The string representation of the paid sign condition property</p>
+     */
+    PaidSignConditionProperty(String stringRepresentation) {
+        this.stringRepresentation = stringRepresentation;
+    }
+
+    /**
+     * Gets the string representation of this paid sign condition property
+     *
+     * @return <p>The string representation of this paid sign condition property</p>
+     */
+    public String getStringRepresentation() {
+        return this.stringRepresentation;
+    }
+
+    /**
+     * Gets the paid sign property matching the given string
+     *
+     * @param propertyString <p>The string representing a paid sign condition property</p>
+     * @return <p>The matching paid sign condition property, or null if no such property exists</p>
+     */
+    public static PaidSignConditionProperty getFromString(String propertyString) {
+        for (PaidSignConditionProperty paidSignProperty : PaidSignConditionProperty.values()) {
+            if (paidSignProperty.getStringRepresentation().equalsIgnoreCase(propertyString)) {
+                return paidSignProperty;
+            }
+        }
+        return null;
+    }
+
+}

src/main/java/net/knarcraft/paidsigns/property/PaidSignProperty.java

@@ -0,0 +1,73 @@
+package net.knarcraft.paidsigns.property;
+
+/**
+ * A representation of a paid sign's editable properties
+ */
+public enum PaidSignProperty {
+
+    /**
+     * The name of a paid sign
+     */
+    NAME("name"),
+
+    /**
+     * The cost of creating a sign matching the paid sign
+     */
+    COST("cost"),
+
+    /**
+     * The permission required to create the plugin sign matching the paid sign
+     */
+    PERMISSION("permission"),
+
+    /**
+     * Whether to ignore case for any sign conditions added to the sign
+     */
+    IGNORE_CASE("ignoreCase"),
+
+    /**
+     * Whether to ignore color for any sign conditions added to the sign
+     */
+    IGNORE_COLOR("ignoreColor"),
+
+    /**
+     * Whether to treat a single condition match as a full match
+     */
+    MATCH_ANY_CONDITION("matchAnyCondition");
+
+    private final String stringRepresentation;
+
+    /**
+     * Instantiates a new paid sign property
+     *
+     * @param stringRepresentation <p>The string representation of the paid sign property</p>
+     */
+    PaidSignProperty(String stringRepresentation) {
+        this.stringRepresentation = stringRepresentation;
+    }
+
+    /**
+     * Gets the string representation of this paid sign property
+     *
+     * @return <p>The string representation of this paid sign property</p>
+     */
+    public String getStringRepresentation() {
+        return this.stringRepresentation;
+    }
+
+    /**
+     * Gets the paid sign property matching the given string
+     *
+     * @param propertyString <p>The string representing a paid sign property</p>
+     * @return <p>The matching paid sign property, or null if no such property exists</p>
+     */
+    public static PaidSignProperty getFromString(String propertyString) {
+        for (PaidSignProperty paidSignProperty : PaidSignProperty.values()) {
+            if (paidSignProperty.getStringRepresentation().equalsIgnoreCase(propertyString)) {
+                return paidSignProperty;
+            }
+        }
+        return null;
+    }
+
+}

src/main/java/net/knarcraft/paidsigns/utility/ColorHelper.java

@@ -1,43 +0,0 @@
-package net.knarcraft.paidsigns.utility;
-
-import net.md_5.bungee.api.ChatColor;
-
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-
-/**
- * A helper class for dealing with colors
- */
-public final class ColorHelper {
-
-    private ColorHelper() {
-
-    }
-
-    /**
-     * Strips all color codes from the given message
-     *
-     * @param message <p>The message to strip color codes from</p>
-     * @return <p>The message without color codes</p>
-     */
-    public static String stripColorCodes(String message) {
-        return ChatColor.stripColor(translateAllColorCodes(message));
-    }
-
-    /**
-     * Translates all found color codes to formatting in a string
-     *
-     * @param message <p>The string to search for color codes</p>
-     * @return <p>The message with color codes translated</p>
-     */
-    public static String translateAllColorCodes(String message) {
-        message = ChatColor.translateAlternateColorCodes('&', message);
-        Pattern pattern = Pattern.compile("(#[a-fA-F0-9]{6})");
-        Matcher matcher = pattern.matcher(message);
-        while (matcher.find()) {
-            message = message.replace(matcher.group(), "" + ChatColor.of(matcher.group()));
-        }
-        return message;
-    }
-
-}

src/main/java/net/knarcraft/paidsigns/utility/PaidSignsTabCompleteHelper.java

@@ -0,0 +1,178 @@
+package net.knarcraft.paidsigns.utility;
+
+import net.knarcraft.knarlib.util.TabCompletionHelper;
+import net.knarcraft.paidsigns.PaidSigns;
+import org.bukkit.Bukkit;
+import org.bukkit.permissions.Permission;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.StringJoiner;
+
+/**
+ * A helper class for providing common tab complete options
+ */
+public final class PaidSignsTabCompleteHelper {
+
+    private static List<String> plugins;
+    private static Map<String, List<String>> permissions;
+
+    private PaidSignsTabCompleteHelper() {
+
+    }
+
+    /**
+     * Gets the available boolean values for tab completion
+     *
+     * @return <p>The available boolean values</p>
+     */
+    public static List<String> getBooleans() {
+        List<String> booleans = new ArrayList<>();
+        booleans.add("true");
+        booleans.add("false");
+        return booleans;
+    }
+
+    /**
+     * Gets the available option states for tab completion
+     *
+     * @return <p>The available option states</p>
+     */
+    public static List<String> getOptionStates() {
+        List<String> optionStates = getBooleans();
+        optionStates.add("default");
+        return optionStates;
+    }
+
+    /**
+     * Gets the names of all registered paid signs
+     *
+     * @return <p>The names of all registered paid signs</p>
+     */
+    public static List<String> getPaidSignNames() {
+        Set<String> paidSignNames = PaidSigns.getInstance().getSignManager().getAllPaidSigns().keySet();
+        List<String> quotedNames = new ArrayList<>(paidSignNames.size());
+        for (String paidSignName : paidSignNames) {
+            quotedNames.add("\"" + paidSignName + "\"");
+        }
+        return quotedNames;
+    }
+
+    /**
+     * Gets all the choices for lines on a sign
+     *
+     * @return <p>All the line indices of a sign</p>
+     */
+    public static List<String> getSignLines() {
+        List<String> lines = new ArrayList<>();
+        for (int i = 1; i < 5; i++) {
+            lines.add(String.valueOf(i));
+        }
+        return lines;
+    }
+
+    /**
+     * Gets some valid costs as example values
+     *
+     * @return <p>Some valid costs</p>
+     */
+    public static List<String> getCosts() {
+        List<String> costs = new ArrayList<>();
+        costs.add("1");
+        costs.add("5");
+        costs.add("10");
+        costs.add("15");
+        return costs;
+    }
+
+    /**
+     * Gets some example paid sign names for auto-completion
+     *
+     * @return <p>Some example paid sign names</p>
+     */
+    public static List<String> getExamplePaidSignNames() {
+        List<String> names = new ArrayList<>();
+        names.add("sign1");
+        names.add("\"lift up sign\"");
+        names.add("\"lift down sign\"");
+        return names;
+    }
+
+    /**
+     * Gets some example condition matching strings for tab completion
+     *
+     * @return <p>Some example "stringToMatch" values</p>
+     */
+    public static List<String> getExampleConditionStrings() {
+        List<String> conditionStrings = new ArrayList<>();
+        conditionStrings.add("[Gate]");
+        conditionStrings.add("\"[Lift Up]\"");
+        conditionStrings.add("\"[Lift Down]\"");
+        return conditionStrings;
+    }
+
+    /**
+     * Gets the tab complete value for the permission typed
+     *
+     * @param typedNode <p>The full permission node typed by the player</p>
+     * @return <p>All known valid auto-complete options</p>
+     */
+    public static List<String> tabCompletePermission(String typedNode) {
+        if (plugins == null) {
+            loadAvailablePermissions();
+        }
+        List<String> output;
+        if (typedNode.contains(".")) {
+            List<String> matchingPermissions = permissions.get(typedNode.substring(0, typedNode.lastIndexOf(".")));
+            if (matchingPermissions == null) {
+                output = new ArrayList<>();
+            } else {
+                //Filter by the typed text
+                output = TabCompletionHelper.filterMatchingStartsWith(matchingPermissions, typedNode);
+            }
+        } else {
+            output = plugins;
+        }
+
+        //Add previous permissions in the comma-separated lists as a prefix
+        return output;
+    }
+
+    /**
+     * Loads all permissions available from bukkit plugins
+     */
+    private static void loadAvailablePermissions() {
+        plugins = new ArrayList<>();
+        permissions = new HashMap<>();
+
+        for (Permission permission : Bukkit.getPluginManager().getPermissions()) {
+            loadPermission(permission.getName());
+        }
+    }
+
+    /**
+     * Loads a given permission into the proper lists and maps
+     *
+     * @param permissionName <p>The permission to load</p>
+     */
+    private static void loadPermission(String permissionName) {
+        String[] permissionParts = permissionName.split("\\.");
+        if (permissionParts.length == 1 && !plugins.contains(permissionParts[0])) {
+            plugins.add(permissionParts[0]);
+        } else if (permissionParts.length > 1) {
+            StringJoiner pathJoiner = new StringJoiner(".");
+            for (int j = 0; j < permissionParts.length - 1; j++) {
+                pathJoiner.add(permissionParts[j]);
+            }
+            String path = pathJoiner.toString();
+            List<String> permissionList = permissions.computeIfAbsent(path, k -> new ArrayList<>());
+            permissionList.add(permissionName);
+
+            loadPermission(path);
+        }
+    }
+
+}

src/main/java/net/knarcraft/paidsigns/utility/SignHelper.java

@@ -0,0 +1,25 @@
+package net.knarcraft.paidsigns.utility;
+
+import org.bukkit.block.Block;
+import org.bukkit.block.Sign;
+
+/**
+ * A helper class for dealing with signs
+ */
+public final class SignHelper {
+
+    private SignHelper() {
+
+    }
+
+    /**
+     * Checks whether the given block is a sign
+     *
+     * @param block <p>The block to check</p>
+     * @return <p>True if the block is a sign</p>
+     */
+    public static boolean isSign(Block block) {
+        return block.getState() instanceof Sign;
+    }
+
+}

src/main/java/net/knarcraft/paidsigns/utility/Tokenizer.java

@@ -6,15 +6,30 @@ import java.util.List;
 /**
  * A tokenizer for being able to support quotes in commands
  */
-public class Tokenizer {
+public final class Tokenizer {
+
+    private Tokenizer() {
+
+    }
 
     /**
      * Tokenizes a string
      *
-     * @param input <p>A string.</p>
+     * @param input <p>A string</p>
-     * @return <p>A list of tokens.</p>
+     * @return <p>A list of tokens</p>
      */
     public static List<String> tokenize(String input) {
+        return tokenize(input, true);
+    }
+
+    /**
+     * Tokenizes a string
+     *
+     * @param input            <p>A string</p>
+     * @param allowEmptyQuotes <p>Whether to treat "" as a token</p>
+     * @return <p>A list of tokens</p>
+     */
+    public static List<String> tokenize(String input, boolean allowEmptyQuotes) {
         List<String> tokens = new ArrayList<>();
         boolean startedQuote = false;
         StringBuilder currentToken = new StringBuilder();
@@ -29,7 +44,7 @@ public class Tokenizer {
                 case '"':
                     if (startedQuote) {
                         //This quote signifies the end of the argument
-                        if (isNotEmpty(currentToken)) {
+                        if (allowEmptyQuotes || isNotEmpty(currentToken)) {
                             tokens.add(currentToken.toString());
                             currentToken = new StringBuilder();
                         }

src/main/resources/config.yml

@@ -1,8 +1,23 @@
+# The currently enabled language. More languages can be added to the language file
+language: en
+
 # Whether to ignore the case (lowercase/uppercase) of the paid sign text. The option can be set on a per-sign basis, but
-# this value is used if not specified. The correct value depends on whether the plugin signs it should match are case-sensitive or not.
+# this value is used if not specified. The correct value depends on whether the plugin signs it should match are
+# case-sensitive or not.
 ignoreCase: true
 
 # Whether to ignore any color or formatting applied to the text when trying to match a paid sign's text. The option can
 # be set on a per-sign basis, but this value is used if not specified. The correct value depends on whether the plugin
 # signs it should match allow coloring or not.
 ignoreColor: false
+
+# Whether to enable refunds to the sign creator when a sign detected as a paid sign is broken (payment will always go
+# to the original creator)
+refundsEnabled: true
+
+# The percentage of the paid sign cost to refund (0-100)
+refundPercentage: 100
+
+# Whether to refund when signs that players have paid for are broken by anything. This includes tnt, creepers, pistons
+# and similar
+refundAlways: false

src/main/resources/plugin.yml

@@ -1,35 +1,78 @@
 name: PaidSigns
 version: '${project.version}'
 main: net.knarcraft.paidsigns.PaidSigns
-api-version: 1.18
+api-version: '1.20'
 prefix: PaidSigns
 depend: [ Vault ]
 authors: [ EpicKnarvik97 ]
 description: Add costs for creating plugin signs
-website: https://git.knarcraft.net
+website: https://git.knarcraft.net/EpicKnarvik97/PaidSigns
 commands:
+  paidsigns:
+    description: Displays information about paid signs commands
+    usage: /<command>
+    permission: paidsigns.info
   addpaidsign:
+    aliases:
+      - aps
     description: Used to add a new paid sign
-    usage: /<command> <id (the text to look for)> <line> <cost> [ignore case] [ignore color]
+    usage: /<command> <name> <cost> [permission] [ignore case] [ignore color] [match any condition]
-    permission: paidsigns.add
+    permission: paidsigns.manage
+  addpaidsigncondition:
+    aliases:
+      - apsc
+    description: Used to add a new match condition for a paid sign
+    usage: /<command> <name (of a paid sign)> <line number> <string to match> [executeRegEx] [ignoreCase] [ignoreColor]
+    permission: paidsigns.manage
+  listpaidsigns:
+    aliases:
+      - lps
+    description: Lists all previously added paid signs
+    usage: /<command> [sign name] [line number]
+    permission: paidsigns.manage
+  editpaidsign:
+    aliases:
+      - eps
+    description: Edits a property of a paid sign or a paid sign condition
+    usage: /<command> <sign name> <property>/<line number> [new value]/<property> [new value]
+    permission: paidsigns.manage
+  removepaidsigncondition:
+    aliases:
+      - rpsc
+    description: Used to remove a match condition from a paid sign
+    usage: /<command> <name (of a paid sign)> <line number>
+    permission: paidsigns.manage
   removepaidsign:
+    aliases:
+      - rps
     description: Used to remove a paid sign
-    usage: /<command> <id (the text to look for)> <line>
+    usage: /<command> <name (of a paid sign)>
-    permission: paidsigns.remove
+    permission: paidsigns.manage
   reload:
+    aliases:
+      - r
     description: Reloads paid signs from disk
     usage: /<command>
-    permision: paidsigns.reload
+    permission: paidsigns.reload
 permissions:
   paidsigns.*:
+    description: Alias to paidsigns.admin
+    default: false
+    children:
+      paidsigns.admin: true
+  paidsigns.admin:
     description: Grants all paid signs permissions
     default: op
     children:
-      paidsigns.create: true
+      paidsigns.info: true
       paidsigns.paymentexempt: true
+      paidsigns.manage: true
       paidsigns.reload: true
-  paidsigns.add:
+  paidsigns.info:
-    description: Grants the permission to add/remove a paid sign
+    description: Grants the permission to see command info
+    default: false
+  paidsigns.manage:
+    description: Grants the permission to add/remove/edit a paid sign
     default: false
   paidsigns.reload:
     description: Grants the permissions to reload the plugin

src/main/resources/strings.yml

@@ -0,0 +1,51 @@
+en:
+  SUCCESS_ADDED_PAID_SIGN: "&bSuccessfully added new paid sign"
+  SUCCESS_ADDED_PAID_SIGN_CONDITION: "&bSuccessfully added new paid sign condition"
+  SUCCESS_UPDATED_PAID_SIGN: "&bSuccessfully updated the paid sign property"
+  SUCCESS_UPDATED_PAID_SIGN_CONDITION: "&bSuccessfully updated the paid sign condition property"
+  SUCCESS_REMOVED_PAID_SIGN: "&bSuccessfully removed paid sign"
+  SUCCESS_REMOVED_CONDITION: "&bSuccessfully removed paid sign condition"
+  SUCCESS_RELOADED: "&bSuccessfully reloaded configuration"
+  SUCCESS_PAID_FOR_SIGN: "&bYou paid &3{cost} &bto create the sign"
+  SUCCESS_REFUNDED: "&bYou were refunded &3{cost} &bfor your broken sign"
+  PAID_SIGNS_INFO: |
+    &f---&3Paid signs&f---
+    {signs}{nextPagePrompt}
+    &f-----------
+  PAID_SIGNS_INFO_FORMAT: |
+    &f| &b{name}
+  PAID_SIGNS_NEXT_PROMPT: |
+    &f| &3Use /lps {nextPage} to see more
+  PAID_SIGN_INFO: |
+    &f---&3Paid sign&f---
+    &f| &bName: &3{name}
+    &f| &bCost: &3{cost}
+    &f| &bPermission: &3{permission}
+    &f| &bIgnore case: &3{case}
+    &f| &bIgnore color: &3{color}
+    &f| &bMatch any condition: &3{any}
+    &f| &bSign conditions:
+    &3{conditions}
+    &f---------------
+  PAID_SIGN_INFO_CONDITION_FORMAT: |
+    &f|  &b{line}: &3{condition}
+  PAID_SIGN_CONDITION_INFO: |
+    &f---&3Paid sign condition&f---
+    &f| &bPaid sign name: &3{name}
+    &f| &bCondition line: &3{line}
+    &f| &bMatch string: &3{match}
+    &f| &bExecute RegEx: &3{regex}
+    &f| &bIgnore case: &3{case}
+    &f| &bIgnore color: &3{color}
+    &f---------------
+  BOOLEAN_TRUE: "&2true"
+  BOOLEAN_FALSE: "&4false"
+  ERROR_INVALID_NUMBER: "&bYou provided an invalid number"
+  ERROR_NAME_DUPLICATE: "&bA paid sign with the same name already exists"
+  ERROR_EXCEPTION_OCCURRED: "&bAn exception occurred. Please notify the server administrator or check the server log."
+  ERROR_INVALID_INPUT: "&bInvalid input: {input}"
+  ERROR_PAID_SIGN_NOT_FOUND: "&bNo such paid sign exists"
+  ERROR_NO_SUCH_CONDITION: "&bThe paid sign you specified has no condition for line {line}"
+  ERROR_CANNOT_AFFORD: "&bYou cannot afford to create this sign. The cost is {cost}"
+  ERROR_INVALID_REGULAR_EXPRESSION: "&bThe provided regular expression is invalid"
+  ERROR_PROPERTY_NOT_RECOGNIZED: "&bThe property you tried to change was not recognized"