Add PlaceholderAPI integration

pom.xml

@@ -111,6 +111,12 @@
             <version>2.1.2</version>
             <scope>provided</scope>
         </dependency>
+        <dependency>
+            <groupId>me.clip</groupId>
+            <artifactId>placeholderapi</artifactId>
+            <version>2.9.2</version>
+            <scope>provided</scope>
+        </dependency>
     </dependencies>
     <repositories>
         <repository>
@@ -136,6 +142,10 @@
             <id>filoghost-repo</id>
             <url>https://ci.filoghost.me/plugin/repository/everything/</url>
         </repository>
+        <repository>
+            <id>placeholderapi</id>
+            <url>http://repo.extendedclip.com/content/repositories/placeholderapi/</url>
+        </repository>
         <repository>
             <id>dre-repo</id>
             <url>http://erethon.de/repo/</url>

src/main/java/de/erethon/dungeonsxl/DungeonsXL.java

@@ -47,12 +47,14 @@ import de.erethon.dungeonsxl.sign.DSignTypeCache;
 import de.erethon.dungeonsxl.sign.SignScriptCache;
 import de.erethon.dungeonsxl.trigger.TriggerListener;
 import de.erethon.dungeonsxl.trigger.TriggerTypeCache;
+import de.erethon.dungeonsxl.util.PlaceholderUtil;
 import de.erethon.dungeonsxl.world.DWorldCache;
 import java.io.File;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
 import java.util.concurrent.CopyOnWriteArrayList;
+import me.clip.placeholderapi.PlaceholderAPI;
 import org.bukkit.Bukkit;
 import org.bukkit.event.HandlerList;
 import org.bukkit.inventory.Inventory;
@@ -122,6 +124,9 @@ public class DungeonsXL extends DREPlugin {
         createCaches();
         initCaches();
         loadData();
+        if (manager.isPluginEnabled("PlaceholderAPI")) {
+            PlaceholderAPI.registerPlaceholderHook("dxl", new PlaceholderUtil(this, "dxl"));
+        }
     }
 
     @Override

src/main/java/de/erethon/dungeonsxl/player/DGamePlayer.java

@@ -130,9 +130,7 @@ public class DGamePlayer extends DInstancePlayer {
         return name;
     }
 
-    /**
-     * @return the DGroup of this player
-     */
+    @Override
     public DGroup getDGroup() {
         if (dGroup == null) {
             dGroup = DGroup.getByPlayer(player);

src/main/java/de/erethon/dungeonsxl/player/DGlobalPlayer.java

@@ -142,6 +142,13 @@ public class DGlobalPlayer implements PlayerWrapper {
         this.breakMode = breakMode;
     }
 
+    /**
+     * @return the DGroup of this player
+     */
+    public DGroup getDGroup() {
+        return DGroup.getByPlayer(player);
+    }
+
     /**
      * @return if the player is in group chat
      */

src/main/java/de/erethon/dungeonsxl/util/PlaceholderUtil.java

@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 2012-2019 Frank Baumann
+ *
+ * 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/>.
+ */
+package de.erethon.dungeonsxl.util;
+
+import de.erethon.dungeonsxl.DungeonsXL;
+import de.erethon.dungeonsxl.game.Game;
+import de.erethon.dungeonsxl.player.DGroup;
+import de.erethon.dungeonsxl.player.DPlayerCache;
+import de.erethon.dungeonsxl.world.DGameWorld;
+import me.clip.placeholderapi.expansion.PlaceholderExpansion;
+import org.bukkit.entity.Player;
+
+/**
+ * @author Daniel Saukel
+ */
+public class PlaceholderUtil extends PlaceholderExpansion {
+
+    private DungeonsXL plugin;
+    private DPlayerCache dPlayers;
+
+    private String identifier;
+
+    public PlaceholderUtil(DungeonsXL plugin, String identifier) {
+        this.plugin = plugin;
+        dPlayers = plugin.getDPlayerCache();
+        this.identifier = identifier;
+    }
+
+    @Override
+    public String getAuthor() {
+        return plugin.getDescription().getAuthors().toString();
+    }
+
+    @Override
+    public String getIdentifier() {
+        return identifier;
+    }
+
+    @Override
+    public String getRequiredPlugin() {
+        return plugin.getName();
+    }
+
+    @Override
+    public String getVersion() {
+        return plugin.getDescription().getVersion();
+    }
+
+    @Override
+    public String onPlaceholderRequest(Player player, String identifier) {
+        if (player == null) {
+            return "";
+        }
+        DGroup group = dPlayers.getByPlayer(player).getDGroup();
+
+        switch (identifier) {
+            case "group_members":
+                return group != null ? group.getPlayers().getNames().toString().substring(1, group.getPlayers().getNames().toString().length() - 2) : "";
+            case "group_name":
+                return group != null ? group.getName() : "";
+            case "group_name_raw":
+                return group != null ? group.getRawName() : "";
+            case "group_player_count":
+                return group != null ? String.valueOf(group.getPlayers().size()) : "";
+            case "game_player_count":
+                Game game = Game.getByPlayer(player);
+                return game != null ? String.valueOf(game.getPlayers().size()) : "";
+            case "floor_player_count":
+                DGameWorld gameWorld = group.getGameWorld();
+                return gameWorld != null ? String.valueOf(gameWorld.getPlayers().size()) : "";
+            case "dungeon_name":
+                return group != null ? group.getDungeonName() : "";
+            case "global_dungeon_count":
+                return String.valueOf(plugin.getDungeonCache().getDungeons().size());
+            case "global_floor_count":
+                return String.valueOf(plugin.getDWorldCache().getResources().size());
+            case "global_instance_count":
+                return String.valueOf(plugin.getDWorldCache().getInstances().size());
+            default:
+                return null;
+        }
+    }
+
+}

src/main/resources/plugin.yml

@@ -4,7 +4,7 @@ version: ${project.version}${buildNo}
 authors: [Frank Baumann, Milan Albrecht, Tobias Schmitz, Daniel Saukel]
 description: ${project.description}
 website: ${project.url}
-softdepend: [CommandsXL, ItemsXL, Vault, Citizens, CustomMobs, InsaneMobs, MythicMobs, HolographicDisplays, LWC]
+softdepend: [CommandsXL, ItemsXL, Vault, Citizens, CustomMobs, InsaneMobs, MythicMobs, HolographicDisplays, LWC, PlaceholderAPI]
 commands:
   dungeonsxl:
     description: Reference command for DungeonsXL.