Removes some redundancy between tab completers

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

@@ -1,10 +1,8 @@
 package net.knarcraft.paidsigns.command;
 
 import net.knarcraft.paidsigns.utility.TabCompleteHelper;
-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;
 
@@ -14,7 +12,7 @@ import java.util.List;
 /**
  * The tab completer for the add paid sign condition command
  */
-public class AddConditionTabCompleter implements TabCompleter {
+public class AddConditionTabCompleter extends TokenizedTabCompleter {
 
     private List<String> lineIndices;
     private List<String> stringsToMatch;
@@ -25,12 +23,10 @@ public class AddConditionTabCompleter implements TabCompleter {
     @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();
         }
-
-        List<String> arguments = Tokenizer.tokenize(String.join(" ", args));
-        int argumentSize = args[args.length - 1].isEmpty() ? arguments.size() : arguments.size() - 1;
         if (argumentSize < 1) {
             return TabCompleteHelper.getPaidSignNames();
         } else if (argumentSize < 2) {

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

@@ -1,11 +1,9 @@
 package net.knarcraft.paidsigns.command;
 
 import net.knarcraft.paidsigns.utility.TabCompleteHelper;
-import net.knarcraft.paidsigns.utility.Tokenizer;
 import org.bukkit.Bukkit;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
-import org.bukkit.command.TabCompleter;
 import org.bukkit.permissions.Permission;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -19,7 +17,7 @@ import java.util.StringJoiner;
 /**
  * The tab completer for the add paid sign command
  */
-public class AddTabCompleter implements TabCompleter {
+public class AddTabCompleter extends TokenizedTabCompleter {
 
     private static List<String> names;
     private static List<String> costs;
@@ -31,12 +29,11 @@ public class AddTabCompleter implements TabCompleter {
     @Override
     public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias,
                                       @NotNull String[] args) {
+        super.onTabComplete(sender, command, alias, args);
         if (names == null) {
             initializeValues();
             loadAvailablePermissions();
         }
-        List<String> arguments = Tokenizer.tokenize(String.join(" ", args));
-        int argumentSize = args[args.length - 1].isEmpty() ? arguments.size() : arguments.size() - 1;
 
         if (argumentSize < 1) {
             return names;

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

@@ -1,10 +1,8 @@
 package net.knarcraft.paidsigns.command;
 
 import net.knarcraft.paidsigns.utility.TabCompleteHelper;
-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;
 
@@ -14,7 +12,7 @@ import java.util.List;
 /**
  * The tab completer for the remove paid sign condition command
  */
-public class RemoveConditionTabCompleter implements TabCompleter {
+public class RemoveConditionTabCompleter extends TokenizedTabCompleter {
 
     private List<String> lineIndices;
 
@@ -22,11 +20,10 @@ public class RemoveConditionTabCompleter implements TabCompleter {
     @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();
         }
-        List<String> arguments = Tokenizer.tokenize(String.join(" ", args));
-        int argumentSize = args[args.length - 1].isEmpty() ? arguments.size() : arguments.size() - 1;
 
         if (argumentSize < 1) {
             return TabCompleteHelper.getPaidSignNames();

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

@@ -0,0 +1,28 @@
+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));
+        argumentSize = args[args.length - 1].isEmpty() ? arguments.size() : arguments.size() - 1;
+        return null;
+    }
+
+}