Updates README and version to 0.9.2.4

README.md

@@ -294,6 +294,7 @@ while the per-gate costs re defined in the .gate files. To define a certain cost
 
 ```
 language - The language to use (Included languages: en, de, es, fr, hu, it, nb-no, nl, nn-no, pt-br, ru)
+adminUpdateAlert - Whether to alert admins about an available update when joining the server
 folders:
   portalFolder - The folder your portal databases are saved in
   gateFolder - The folder containing your .gate files
@@ -389,6 +390,12 @@ portalInfoServer=Server: %server%
 
 # Changes
 
+#### \[Version 0.9.2.4] EpicKnarvik97 fork
+
+- Adds update checking, which will display a notice in the console when updates are available
+- Adds an alert about an available update when an admin joins the server
+- Adds the adminUpdateAlert config option to allow the admin notices to be turned off
+
 #### \[Version 0.9.2.3] EpicKnarvik97 fork
 
 - Fixes a typo which caused both colors to change into the highlightSignColor

pom.xml

@@ -4,7 +4,7 @@
 
     <groupId>net.knarcraft</groupId>
     <artifactId>Stargate</artifactId>
-    <version>0.9.2.3</version>
+    <version>0.9.2.4</version>
 
     <licenses>
         <license>

src/main/java/net/knarcraft/stargate/Stargate.java

@@ -21,6 +21,7 @@ import net.knarcraft.stargate.portal.PortalRegistry;
 import net.knarcraft.stargate.thread.BlockChangeThread;
 import net.knarcraft.stargate.thread.ChunkUnloadThread;
 import net.knarcraft.stargate.thread.StarGateThread;
+import net.knarcraft.stargate.utility.UpdateChecker;
 import org.bukkit.Server;
 import org.bukkit.command.PluginCommand;
 import org.bukkit.configuration.file.FileConfiguration;
@@ -55,6 +56,8 @@ public class Stargate extends JavaPlugin {
     private static PluginManager pluginManager;
     private static StargateConfig stargateConfig;
 
+    private static String updateAvailable = null;
+
     /**
      * Empty constructor necessary for Spigot
      */
@@ -74,6 +77,26 @@ public class Stargate extends JavaPlugin {
         super(loader, descriptionFile, dataFolder, file);
     }
 
+    /**
+     * Stores information about an available update
+     *
+     * <p>If a non-null version is given, joining admins will be alerted about the new update.</p>
+     *
+     * @param version <p>The version of the new update available</p>
+     */
+    public static void setUpdateAvailable(String version) {
+        updateAvailable = version;
+    }
+
+    /**
+     * Gets information about an available update
+     *
+     * @return <p>The version number if an update is available. Null otherwise</p>
+     */
+    public static String getUpdateAvailable() {
+        return updateAvailable;
+    }
+
     /**
      * Gets an instance of this plugin
      *
@@ -334,6 +357,9 @@ public class Stargate extends JavaPlugin {
         runThreads();
 
         this.registerCommands();
+
+        //Check for any available updates
+        UpdateChecker.checkForUpdate();
     }
 
     /**

src/main/java/net/knarcraft/stargate/config/ConfigOption.java

@@ -147,7 +147,12 @@ public enum ConfigOption {
     /**
      * Whether to enable debug output for debugging permissions
      */
-    PERMISSION_DEBUG("debugging.permissionDebug", "Whether to enable permission debugging output", false);
+    PERMISSION_DEBUG("debugging.permissionDebug", "Whether to enable permission debugging output", false),
+
+    /**
+     * Whether to alert admins about new updates
+     */
+    ADMIN_UPDATE_ALERT("adminUpdateAlert", "Whether to alert admins about new plugin updates", true);
 
 
     private final String configNode;

src/main/java/net/knarcraft/stargate/config/StargateConfig.java

@@ -319,6 +319,15 @@ public final class StargateConfig {
         }
     }
 
+    /**
+     * Gets whether admins should be alerted about new plugin updates
+     *
+     * @return <p>Whether admins should be alerted about new updates</p>
+     */
+    public boolean alertAdminsAboutUpdates() {
+        return (boolean) configOptions.get(ConfigOption.ADMIN_UPDATE_ALERT);
+    }
+
     /**
      * Loads all config values
      */

src/main/java/net/knarcraft/stargate/listener/PlayerEventListener.java

@@ -13,6 +13,7 @@ import net.knarcraft.stargate.utility.BungeeHelper;
 import net.knarcraft.stargate.utility.MaterialHelper;
 import net.knarcraft.stargate.utility.PermissionHelper;
 import net.knarcraft.stargate.utility.UUIDMigrationHelper;
+import net.knarcraft.stargate.utility.UpdateChecker;
 import org.bukkit.ChatColor;
 import org.bukkit.GameMode;
 import org.bukkit.block.Block;
@@ -48,14 +49,22 @@ public class PlayerEventListener implements Listener {
      */
     @EventHandler
     public void onPlayerJoin(PlayerJoinEvent event) {
+        Player player = event.getPlayer();
         //Migrate player name to UUID if necessary
-        UUIDMigrationHelper.migrateUUID(event.getPlayer());
+        UUIDMigrationHelper.migrateUUID(player);
+
+        //Notify joining admins about the available update
+        String availableUpdate = Stargate.getUpdateAvailable();
+        if (availableUpdate != null && Stargate.getStargateConfig().alertAdminsAboutUpdates() &&
+                player.hasPermission("stargate.admin")) {
+            String updateMessage = UpdateChecker.getUpdateAvailableString(availableUpdate, Stargate.getPluginVersion());
+            Stargate.getMessageSender().sendErrorMessage(player, updateMessage);
+        }
 
         if (!Stargate.getGateConfig().enableBungee()) {
             return;
         }
 
-        Player player = event.getPlayer();
         //Check if the player is waiting to be teleported to a stargate
         String destination = BungeeHelper.removeFromQueue(player.getUniqueId());
         if (destination == null) {

src/main/java/net/knarcraft/stargate/utility/UpdateChecker.java

@@ -0,0 +1,87 @@
+package net.knarcraft.stargate.utility;
+
+import net.knarcraft.stargate.Stargate;
+import org.bukkit.scheduler.BukkitScheduler;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+import java.util.logging.Level;
+
+/**
+ * The update checker is responsible for looking for new updates
+ */
+public final class UpdateChecker {
+
+    private final static String APIResourceURL = "https://api.spigotmc.org/legacy/update.php?resource=97784";
+    private final static String updateNotice = "A new update is available: %s (You are still on %s)";
+
+    private UpdateChecker() {
+
+    }
+
+    /**
+     * Checks if there's a new update available, and alerts the user if necessary
+     */
+    public static void checkForUpdate() {
+        BukkitScheduler scheduler = Stargate.getInstance().getServer().getScheduler();
+        scheduler.runTaskAsynchronously(Stargate.getInstance(), UpdateChecker::queryAPI);
+    }
+
+    /**
+     * Queries the spigot API to check for a newer version, and informs the user
+     */
+    private static void queryAPI() {
+        try {
+            InputStream inputStream = new URL(APIResourceURL).openStream();
+            BufferedReader reader = FileHelper.getBufferedReaderFromInputStream(inputStream);
+            //There should only be one line of output
+            String newVersion = reader.readLine();
+            reader.close();
+
+            String oldVersion = Stargate.getPluginVersion();
+            //If there is a newer version, notify the user
+            if (isVersionHigher(oldVersion, newVersion)) {
+                Stargate.getConsoleLogger().log(Level.INFO, Stargate.getBackupString("prefix") +
+                        getUpdateAvailableString(newVersion, oldVersion));
+                Stargate.setUpdateAvailable(newVersion);
+            }
+        } catch (IOException e) {
+            Stargate.debug("UpdateChecker", "Unable to get newest version.");
+        }
+    }
+
+    /**
+     * Gets the string to display to a user to alert about a new update
+     *
+     * @param newVersion <p>The new available plugin version</p>
+     * @param oldVersion <p>The old (current) plugin version</p>
+     * @return <p>The string to display</p>
+     */
+    public static String getUpdateAvailableString(String newVersion, String oldVersion) {
+        return String.format(updateNotice, newVersion, oldVersion);
+    }
+
+    /**
+     * Decides whether one version number is higher than another
+     *
+     * @param oldVersion <p>The old version to check</p>
+     * @param newVersion <p>The new version to check</p>
+     * @return <p>True if the new version is higher than the old one</p>
+     */
+    public static boolean isVersionHigher(String oldVersion, String newVersion) {
+        String[] oldVersionParts = oldVersion.split("\\.");
+        String[] newVersionParts = newVersion.split("\\.");
+        int versionLength = Math.max(oldVersionParts.length, newVersionParts.length);
+        for (int i = 0; i < versionLength; i++) {
+            int oldVersionNumber = oldVersionParts.length > i ? Integer.parseInt(oldVersionParts[i]) : 0;
+            int newVersionNumber = newVersionParts.length > i ? Integer.parseInt(newVersionParts[i]) : 0;
+            if (newVersionNumber != oldVersionNumber) {
+                return newVersionNumber > oldVersionNumber;
+            }
+        }
+        return false;
+    }
+
+}

src/main/resources/config.yml

@@ -18,6 +18,7 @@
 # mainSignColor - The color used for drawing signs (Default: BLACK).
 # highlightSignColor - The color used for sign markings (Default: WHITE)
 # verifyPortals - Whether all the non-sign blocks are checked to match the gate layout when a stargate is loaded.
+# adminUpdateAlert - Whether to alert admins about new plugin updates
 # I------------I-------------I #
 # stargate economy options #
 # I------------I-------------I #
@@ -36,6 +37,7 @@
 # permissionDebug - This will output any and all Permissions checks to console, used for permissions debugging (Requires debug: true)
 
 language: en
+adminUpdateAlert: true
 folders:
   portalFolder: plugins/Stargate/portals/
   gateFolder: plugins/Stargate/gates/

src/main/resources/plugin.yml

@@ -1,6 +1,6 @@
 name: Stargate
 main: net.knarcraft.stargate.Stargate
-version: 0.9.2.3
+version: 0.9.2.4
 description: Stargate mod for Bukkit Revived
 author: EpicKnarvik97
 authors: [ Drakia, PseudoKnight, EpicKnarvik97 ]