Add support for dedicated potion effect node in classes.

This makes it a little less awkward to add potion effects to a class, giving them their own node instead of having to "share" with the items node.

src/main/java/com/garbagemule/MobArena/ArenaClass.java

@@ -28,6 +28,7 @@ public class ArenaClass
     private Thing helmet, chestplate, leggings, boots, offhand;
     private List<Thing> armor;
     private List<Thing> items;
+    private List<Thing> effects;
     private Map<String,Boolean> perms;
     private Map<String,Boolean> lobbyperms;
     private boolean unbreakableWeapons, unbreakableArmor;
@@ -44,6 +45,7 @@ public class ArenaClass
         
         this.items = new ArrayList<>();
         this.armor = new ArrayList<>(4);
+        this.effects = new ArrayList<>();
         this.perms = new HashMap<>();
         this.lobbyperms = new HashMap<>();
 
@@ -137,6 +139,10 @@ public class ArenaClass
         this.armor = armor;
     }
 
+    public void setEffects(List<Thing> effects) {
+        this.effects = effects;
+    }
+    
     public boolean hasPermission(Player p) {
         String perm = "mobarena.classes." + configName;
         return !p.isPermissionSet(perm) || p.hasPermission(perm);
@@ -165,6 +171,9 @@ public class ArenaClass
         if (leggings   != null) leggings.giveTo(p);
         if (boots      != null) boots.giveTo(p);
         if (offhand    != null) offhand.giveTo(p);
+
+        // Potion effects
+        effects.forEach(thing -> thing.giveTo(p));
     }
     
     /**

src/main/java/com/garbagemule/MobArena/ArenaMasterImpl.java

@@ -331,6 +331,9 @@ public class ArenaMasterImpl implements ArenaMaster
         // Load armor
         loadClassArmor(section, arenaClass);
 
+        // Load potion effects
+        loadClassPotionEffects(section, arenaClass);
+
         // Per-class permissions
         loadClassPermissions(arenaClass, section);
         loadClassLobbyPermissions(arenaClass, section);
@@ -403,6 +406,24 @@ public class ArenaMasterImpl implements ArenaMaster
         setter.accept(thing);
     }
 
+    private void loadClassPotionEffects(ConfigurationSection section, ArenaClass arenaClass) {
+        List<String> effects = section.getStringList("effects");
+        if (effects == null || effects.isEmpty()) {
+            String value = section.getString("effects", "");
+            effects = Arrays.asList(value.split(","));
+        }
+
+        // Prepend "effect:" for the potion effect thing parser
+        List<Thing> things = effects.stream()
+            .map(String::trim)
+            .map(s -> "effect:" + s)
+            .map(plugin.getThingManager()::parse)
+            .filter(Objects::nonNull)
+            .collect(Collectors.toList());
+
+        arenaClass.setEffects(things);
+    }
+
     private void loadClassPermissions(ArenaClass arenaClass, ConfigurationSection section) {
         List<String> perms = section.getStringList("permissions");
         if (perms.isEmpty()) return;