Add PlaceholderAPI support (Addresses #106)

Author: RednedEpic

pom.xml

@@ -4,7 +4,7 @@
     <groupId>mc.alk</groupId>
     <artifactId>BattleArena</artifactId>
     <packaging>jar</packaging>
-    <version>3.9.13.2</version>
+    <version>3.9.13.3</version>
     <name>BattleArena</name>
     <url>https://github.com/BattlePlugins/BattleArena</url>
     <properties>
@@ -53,6 +53,10 @@
             <id>codemc-repo</id>
             <url>https://repo.codemc.org/repository/maven-public</url>
         </repository>
+        <repository>
+            <id>placeholderapi-repo</id>
+            <url>http://repo.extendedclip.com/content/repositories/placeholderapi/</url>
+        </repository>
     </repositories>
     <dependencies>
         <!--
@@ -184,6 +188,12 @@
             <version>1.14.1</version>
             <scope>provided</scope>
         </dependency>
+        <dependency>
+            <groupId>me.clip</groupId>
+            <artifactId>placeholderapi</artifactId>
+            <version>2.9.2</version>
+            <scope>provided</scope>
+        </dependency>
         <dependency>
             <groupId>com.sk89q</groupId>
             <artifactId>worldedit</artifactId>

src/java/mc/alk/arena/competition/match/Match.java

@@ -1621,6 +1621,10 @@ public MatchResult getResult() {
         return matchResult;
     }
 
+    public Countdown getMatchCountdown() {
+        return matchCountdown;
+    }
+
     public Set<ArenaTeam> getVictors() {
         return matchResult.getVictors();
     }

src/java/mc/alk/arena/listeners/BAPluginListener.java

@@ -16,6 +16,7 @@
 import mc.alk.arena.controllers.plugins.WorldGuardController;
 import mc.alk.arena.objects.messaging.AnnouncementOptions;
 import mc.alk.arena.objects.messaging.plugins.HerochatPlugin;
+import mc.alk.arena.plugins.BAPlaceholderExtension;
 import mc.alk.arena.plugins.combattag.TagsOff;
 import mc.alk.arena.plugins.combattag.TagsOn;
 import mc.alk.arena.util.Log;
@@ -41,6 +42,7 @@ public class BAPluginListener implements Listener {
 
     @EventHandler
     public void onPluginEnable(PluginEnableEvent event) {
+        // TODO: Clean this up
         if (event.getPlugin().getName().equalsIgnoreCase("BattleTracker")) {
             loadBattleTracker();
         } else if (event.getPlugin().getName().equalsIgnoreCase("CombatTag")) {
@@ -67,6 +69,8 @@ public void onPluginEnable(PluginEnableEvent event) {
             loadMultiverseCore();
         } else if (event.getPlugin().getName().equalsIgnoreCase("Multiverse-Inventories")) {
             loadMultiverseInventory();
+        } else if (event.getPlugin().getName().equalsIgnoreCase("PlaceholderAPI")) {
+            loadPlaceholderAPI();
         } else if (event.getPlugin().getName().equalsIgnoreCase("PylamoRestorationSystem")) {
             loadPylamoRestoration();
         } else if (event.getPlugin().getName().equalsIgnoreCase("TagAPI")) {
@@ -98,6 +102,7 @@ public void loadAll() {
         loadMultiInv();
         loadMultiverseCore();
         loadMultiverseInventory();
+        loadPlaceholderAPI();
         loadPylamoRestoration();
         loadTagAPI();
         loadWorldEdit();
@@ -249,6 +254,14 @@ public void loadMultiverseInventory() {
         }
     }
 
+    public void loadPlaceholderAPI() {
+        Plugin plugin = Bukkit.getPluginManager().getPlugin("PlaceholderAPI");
+        if (plugin != null) {
+            new BAPlaceholderExtension().register();
+            Log.info(BattleArena.getPluginName() + " PlaceholderAPI detected. Implementing placeholder hook.");
+        }
+    }
+
     public void loadPylamoRestoration() {
         if (!PylamoController.enabled()) {
             Plugin plugin = Bukkit.getPluginManager().getPlugin("PylamoRestorationSystem");

src/java/mc/alk/arena/plugins/BAPlaceholderExtension.java

@@ -0,0 +1,88 @@
+package mc.alk.arena.plugins;
+
+import mc.alk.arena.BattleArena;
+import mc.alk.arena.competition.Competition;
+import mc.alk.arena.competition.match.Match;
+import mc.alk.arena.objects.ArenaPlayer;
+import mc.alk.arena.util.MessageUtil;
+import me.clip.placeholderapi.expansion.PlaceholderExpansion;
+import org.bukkit.entity.Player;
+
+/**
+ * Placeholder expansion for PlaceholderAPI
+ *
+ * @author Redned
+ */
+public class BAPlaceholderExtension extends PlaceholderExpansion {
+
+    @Override
+    public String getIdentifier() {
+        return "BA";
+    }
+
+    @Override
+    public String getAuthor() {
+        return "BattlePlugins";
+    }
+
+    @Override
+    public String getVersion() {
+        return BattleArena.getSelf().getDescription().getVersion();
+    }
+
+    @Override
+    public String onPlaceholderRequest(Player player, String params) {
+        if (player == null || !player.isOnline())
+            return "";
+
+        ArenaPlayer arenaPlayer = BattleArena.toArenaPlayer(player);
+        if (arenaPlayer == null)
+            return "";
+
+        if (arenaPlayer.getCompetition() == null)
+            return "";
+
+        Competition competition = arenaPlayer.getCompetition();
+        switch (params) {
+            case "active_game":
+                return competition.getParams().getName();
+            case "active_game_prefix":
+                return competition.getParams().getPrefix();
+            case "active_game_players":
+                return String.valueOf(competition.getPlayers().size());
+            case "active_game_teams":
+                return String.valueOf(competition.getTeams().size());
+            case "active_game_team":
+                return MessageUtil.decolorChat(competition.getTeam(arenaPlayer).getScoreboardDisplayName());
+            case "active_game_team_color":
+                return competition.getTeam(arenaPlayer).getTeamChatColor().toString();
+            case "active_game_lives_left":
+                return String.valueOf(arenaPlayer.getMetaData().getLivesLeft());
+            case "active_game_time_left":
+                if (arenaPlayer.getCompetition() instanceof Match) {
+                    Match match = (Match) competition;
+                    return String.valueOf((int) (match.getMatchCountdown().getTimeRemaining() / 1000));
+                }
+                break;
+            case "active_game_players_left":
+                if (arenaPlayer.getCompetition() instanceof Match) {
+                    Match match = (Match) competition;
+                    return String.valueOf(match.getAlivePlayers().size());
+                }
+                break;
+            case "active_game_teams_left":
+                if (arenaPlayer.getCompetition() instanceof Match) {
+                    Match match = (Match) arenaPlayer.getCompetition();
+                    return String.valueOf(match.getAliveTeams().size());
+                }
+                break;
+            case "active_game_arena":
+                if (arenaPlayer.getCompetition() instanceof Match) {
+                    Match match = (Match) arenaPlayer.getCompetition();
+                    return match.getArena().getName();
+                }
+                break;
+        }
+        return null;
+    }
+}