Merge remote-tracking branch 'origin/master'

# Conflicts:
#	src/main/java/net/Indyuce/mmocore/MMOCore.java
#	src/main/java/net/Indyuce/mmocore/api/player/PlayerData.java
#	src/main/java/net/Indyuce/mmocore/manager/data/mysql/MySQLPlayerDataManager.java

pom.xml

@@ -15,20 +15,6 @@
 		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 	</properties>
 
-	<distributionManagement>
-		<repository>
-			<id>nexus</id>
-			<name>Lumine Releases</name>
-			<url>https://mvn.lumine.io/repository/maven-releases/</url>
-		</repository>
-		<snapshotRepository>
-			<id>nexus</id>
-			<name>Lumine Snapshots</name>
-			<url>https://mvn.lumine.io/repository/maven-snapshots/</url>
-		</snapshotRepository>
-
-	</distributionManagement>
-
 	<build>
 		<finalName>${project.name}-${project.version}</finalName>
 		<resources>
@@ -81,13 +67,13 @@
 	<repositories>
 
 		<repository>
-			<id>lumine</id>
+			<id>nexus</id>
-			<url>https://mvn.lumine.io/repository/maven/</url>
+			<url>https://mvn.lumine.io/repository/maven-public/</url>
 		</repository>
 
 		<repository>
-			<id>placeholderapi</id>
+			<id>phoenix</id>
-			<url>https://repo.extendedclip.com/content/repositories/placeholderapi/</url>
+			<url>http://la-grange-evasion.pro.dns-orange.fr:8081/repository/maven-public/</url>
 		</repository>
 
 		<repository>
@@ -160,8 +146,8 @@
 
 		<dependency>
 			<groupId>me.clip</groupId>
-			<artifactId>placeholderapi</artifactId>
+			<artifactId>PlaceholderAPI</artifactId>
-			<version>2.9.2</version>
+			<version>2.11.1</version>
 			<scope>provided</scope>
 		</dependency>
 
@@ -182,7 +168,7 @@
 		<dependency>
 			<groupId>net.citizensnpcs</groupId>
 			<artifactId>Citizens</artifactId>
-			<version>2.0.25</version>
+			<version>2.0.30-b2571</version>
             <scope>provided</scope>
 		</dependency>
 

src/main/java/net/Indyuce/mmocore/MMOCore.java

@@ -27,7 +27,6 @@ import net.Indyuce.mmocore.comp.vault.VaultEconomy;
 import net.Indyuce.mmocore.comp.vault.VaultMMOLoader;
 import net.Indyuce.mmocore.guild.provided.Guild;
 import net.Indyuce.mmocore.listener.*;
-import net.Indyuce.mmocore.listener.bungee.GetMMOCorePlayerListener;
 import net.Indyuce.mmocore.listener.event.PlayerPressKeyListener;
 import net.Indyuce.mmocore.listener.option.*;
 import net.Indyuce.mmocore.listener.profession.FishingListener;
@@ -52,7 +51,6 @@ import org.bukkit.command.CommandMap;
 import org.bukkit.configuration.file.FileConfiguration;
 import org.bukkit.scheduler.BukkitRunnable;
 import org.jetbrains.annotations.NotNull;
-import org.spigotmc.SpigotConfig;
 
 import java.io.File;
 import java.lang.reflect.Field;
@@ -99,6 +97,8 @@ public class MMOCore extends LuminePlugin {
 	// Modules
 	@NotNull
 	public PartyModule partyModule;
+	@NotNull
+	public GuildModule guildModule;
 
     public boolean shouldDebugSQL = false;
     public boolean hasBungee=false;
@@ -255,6 +255,16 @@ public class MMOCore extends LuminePlugin {
             partyModule = new MMOCorePartyModule();
         }
 
+		// Load guild module
+		try {
+			String pluginName = UtilityMethods.enumName(getConfig().getString("guild-plugin"));
+			GuildModuleType moduleType = GuildModuleType.valueOf(pluginName);
+			Validate.isTrue(moduleType.isValid(), "Plugin '" + moduleType.name() + "' is not installed");
+			guildModule = moduleType.provideModule();
+		} catch (RuntimeException exception) {
+			getLogger().log(Level.WARNING, "Could not initialize guild module: " + exception.getMessage());
+			guildModule = new MMOCoreGuildModule();
+		}
 
 		// Skill casting
 		try {
@@ -392,7 +402,7 @@ public class MMOCore extends LuminePlugin {
 	 * Called either when the server starts when initializing the manager for
 	 * the first time, or when issuing a plugin reload; in that case, stuff
 	 * like listeners must all be cleared before.
-     * <p>
+	 *
 	 * Also see {@link MMOCoreManager}
 	 *
 	 * @param clearBefore True when issuing a plugin reload
@@ -462,7 +472,7 @@ public class MMOCore extends LuminePlugin {
 	}
 
 	public static void sqlDebug(String s) {
-        if (!MMOCore.plugin.shouldDebugSQL) return;
+		if(!MMOCore.plugin.shouldDebugSQL) return;
 		MMOCore.plugin.getLogger().warning("- [SQL Debug] " + s);
 	}
 }

src/main/java/net/Indyuce/mmocore/api/PlayerActionBar.java

@@ -49,7 +49,7 @@ public class PlayerActionBar extends BukkitRunnable {
                                 .replace("{stellium}", digit.format(data.getStellium()))
                                 .replace("{max_stellium}", StatInfo.valueOf("MAX_STELLIUM").format(data.getStats().getStat("MAX_STELLIUM")))
                                 .replace("{class}", data.getProfess().getName())
-                                .replace("{xp}", "" + data.getExperience())
+                                .replace("{xp}", MythicLib.plugin.getMMOConfig().decimal.format(data.getExperience()))
                                 .replace("{armor}", StatInfo.valueOf("ARMOR").format(data.getPlayer().getAttribute(Attribute.GENERIC_ARMOR).getValue()))
                                 .replace("{level}", "" + data.getLevel())
                                 .replace("{name}", data.getPlayer().getDisplayName())))));

src/main/java/net/Indyuce/mmocore/api/event/PlayerLevelUpEvent.java

@@ -4,11 +4,12 @@ import org.bukkit.event.HandlerList;
 
 import net.Indyuce.mmocore.experience.Profession;
 import net.Indyuce.mmocore.api.player.PlayerData;
+import org.jetbrains.annotations.Nullable;
 
 public class PlayerLevelUpEvent extends PlayerDataEvent {
 	private static final HandlerList handlers = new HandlerList();
 
-	// if null, this is main level
+	// If null, this is main level
 	private final Profession profession;
 	private final int oldLevel, newLevel;
 
@@ -36,6 +37,7 @@ public class PlayerLevelUpEvent extends PlayerDataEvent {
 		return profession != null;
 	}
 
+	@Nullable
 	public Profession getProfession() {
 		return profession;
 	}

src/main/java/net/Indyuce/mmocore/api/player/PlayerData.java

@@ -1,6 +1,5 @@
 package net.Indyuce.mmocore.api.player;
 
-import com.google.gson.JsonObject;
 import io.lumine.mythic.lib.api.player.MMOPlayerData;
 import io.lumine.mythic.lib.player.TemporaryPlayerData;
 import io.lumine.mythic.lib.player.cooldown.CooldownMap;
@@ -29,7 +28,6 @@ import net.Indyuce.mmocore.experience.droptable.ExperienceItem;
 import net.Indyuce.mmocore.experience.droptable.ExperienceTable;
 import net.Indyuce.mmocore.guild.provided.Guild;
 import net.Indyuce.mmocore.loot.chest.particle.SmallParticleEffect;
-import net.Indyuce.mmocore.manager.data.mysql.MySQLTableEditor;
 import net.Indyuce.mmocore.party.AbstractParty;
 import net.Indyuce.mmocore.party.provided.Party;
 import net.Indyuce.mmocore.player.Unlockable;
@@ -52,7 +50,6 @@ import org.jetbrains.annotations.NotNull;
 import javax.annotation.Nullable;
 import java.util.*;
 import java.util.logging.Level;
-import java.util.stream.Collectors;
 
 
 public class PlayerData extends OfflinePlayerData implements Closable, ExperienceTableClaimer {
@@ -601,18 +598,19 @@ public class PlayerData extends OfflinePlayerData implements Closable, Experienc
             return;
         }
 
-        value = MMOCore.plugin.boosterManager.calculateExp(null, value);
-        value *= 1 + getStats().getStat("ADDITIONAL_EXPERIENCE") / 100;
-
         // Splitting exp through party members
-        AbstractParty party = getParty();
+        AbstractParty party;
-        if (splitExp && party != null) {
+        if (splitExp && (party = getParty()) != null) {
-            List<PlayerData> onlineMembers = getParty().getOnlineMembers();
+            List<PlayerData> onlineMembers = party.getOnlineMembers();
             value /= onlineMembers.size();
             for (PlayerData member : onlineMembers)
-                member.giveExperience(value, EXPSource.PARTY_SHARING, null, false);
+                if (!equals(member))
+                    member.giveExperience(value, source, null, false);
         }
 
+        // Apply buffs AFTER splitting exp
+        value *= (1 + getStats().getStat("ADDITIONAL_EXPERIENCE") / 100) * MMOCore.plugin.boosterManager.getMultiplier(null);
+
         PlayerExperienceGainEvent event = new PlayerExperienceGainEvent(this, value, source);
         Bukkit.getPluginManager().callEvent(event);
         if (event.isCancelled())
@@ -620,7 +618,7 @@ public class PlayerData extends OfflinePlayerData implements Closable, Experienc
 
         // Experience hologram
         if (hologramLocation != null && isOnline())
-            MMOCoreUtils.displayIndicator(hologramLocation, MMOCore.plugin.configManager.getSimpleMessage("exp-hologram", "exp", String.valueOf(event.getExperience())).message());
+            MMOCoreUtils.displayIndicator(hologramLocation, MMOCore.plugin.configManager.getSimpleMessage("exp-hologram", "exp", MythicLib.plugin.getMMOConfig().decimal.format(event.getExperience())).message());
 
         experience = Math.max(0, experience + event.getExperience());
 

src/main/java/net/Indyuce/mmocore/command/rpg/admin/ExperienceCommandTreeNode.java

@@ -1,5 +1,6 @@
 package net.Indyuce.mmocore.command.rpg.admin;
 
+import io.lumine.mythic.lib.MythicLib;
 import io.lumine.mythic.lib.command.api.CommandTreeNode;
 import io.lumine.mythic.lib.command.api.Parameter;
 import net.Indyuce.mmocore.MMOCore;
@@ -23,9 +24,9 @@ public class ExperienceCommandTreeNode extends CommandTreeNode {
 
 		addChild(new ActionCommandTreeNode(this, "set", PlayerData::setExperience, PlayerProfessions::setExperience));
 		addChild(new ActionCommandTreeNode(this, "give", (data, value) -> data.giveExperience(value, EXPSource.COMMAND), (professions, profession,
-				value) -> professions.giveExperience(profession, value, EXPSource.COMMAND, professions.getPlayerData().getPlayer().getLocation())));
+				value) -> professions.giveExperience(profession, value, EXPSource.COMMAND)));
 		addChild(new ActionCommandTreeNode(this, "take", (data, value) -> data.giveExperience(-value, EXPSource.COMMAND), (professions, profession,
-				value) -> professions.giveExperience(profession, -value, EXPSource.COMMAND, professions.getPlayerData().getPlayer().getLocation())));
+				value) -> professions.giveExperience(profession, -value, EXPSource.COMMAND)));
 	}
 
 	public static class ActionCommandTreeNode extends CommandTreeNode {
@@ -68,7 +69,7 @@ public class ExperienceCommandTreeNode extends CommandTreeNode {
 			if (args[4].equalsIgnoreCase("main")) {
 				main.accept(data, amount);
 				CommandVerbose.verbose(sender, CommandVerbose.CommandType.EXPERIENCE, ChatColor.GOLD + player.getName() + ChatColor.YELLOW
-						+ " now has " + ChatColor.GOLD + data.getExperience() + ChatColor.YELLOW + " EXP.");
+						+ " now has " + ChatColor.GOLD + MythicLib.plugin.getMMOConfig().decimal.format(data.getExperience()) + ChatColor.YELLOW + " EXP.");
 				return CommandResult.SUCCESS;
 			}
 

src/main/java/net/Indyuce/mmocore/command/rpg/admin/InfoCommandTreeNode.java

@@ -1,5 +1,6 @@
 package net.Indyuce.mmocore.command.rpg.admin;
 
+import io.lumine.mythic.lib.MythicLib;
 import org.bukkit.Bukkit;
 import org.bukkit.ChatColor;
 import org.bukkit.command.CommandSender;
@@ -33,7 +34,7 @@ public class InfoCommandTreeNode extends CommandTreeNode {
 		sender.sendMessage(ChatColor.YELLOW + "----------------------------------------------------");
 		sender.sendMessage(ChatColor.YELLOW + "Class: " + ChatColor.GOLD + playerData.getProfess().getName());
 		sender.sendMessage(ChatColor.YELLOW + "Level: " + ChatColor.GOLD + playerData.getLevel());
-		sender.sendMessage(ChatColor.YELLOW + "Experience: " + ChatColor.GOLD + playerData.getExperience() + ChatColor.YELLOW + " / " + ChatColor.GOLD
+		sender.sendMessage(ChatColor.YELLOW + "Experience: " + ChatColor.GOLD + MythicLib.plugin.getMMOConfig().decimal.format(playerData.getExperience()) + ChatColor.YELLOW + " / " + ChatColor.GOLD
 				+ playerData.getLevelUpExperience());
 		sender.sendMessage(ChatColor.YELLOW + "Class Points: " + ChatColor.GOLD + playerData.getClassPoints());
 		sender.sendMessage(ChatColor.YELLOW + "Quests: " + ChatColor.GOLD + playerData.getQuestData().getFinishedQuests().size() + ChatColor.YELLOW

src/main/java/net/Indyuce/mmocore/comp/placeholder/RPGPlaceholders.java

@@ -128,7 +128,7 @@ public class RPGPlaceholders extends PlaceholderExpansion {
 					.valueOf(playerData.getCollectionSkills().getLevel(identifier.substring(11).replace(" ", "-").replace("_", "-").toLowerCase()));
 
 		else if (identifier.equals("experience"))
-			return String.valueOf(playerData.getExperience());
+			return MythicLib.plugin.getMMOConfig().decimal.format(playerData.getExperience());
 
 		else if (identifier.equals("next_level"))
 			return String.valueOf(playerData.getLevelUpExperience());
@@ -226,9 +226,9 @@ public class RPGPlaceholders extends PlaceholderExpansion {
 			else if (placeholder.equalsIgnoreCase("leader"))
 				return Bukkit.getOfflinePlayer(playerData.getGuild().getOwner()).getName();
 			else if (placeholder.equalsIgnoreCase("members"))
-				return "" + playerData.getGuild().getMembers().count();
+				return String.valueOf(playerData.getGuild().countMembers());
 			else if (placeholder.equalsIgnoreCase("online_members"))
-				return "" + playerData.getGuild().getMembers().countOnline();
+				return String.valueOf(playerData.getGuild().countOnlineMembers());
 		}
 
 		return null;

src/main/java/net/Indyuce/mmocore/experience/EXPSource.java

@@ -19,7 +19,10 @@ public enum EXPSource {
 
     /**
      * When party members share exp
+     *
+     * @deprecated Not used anymore
      */
+    @Deprecated
     PARTY_SHARING,
 
     /**

src/main/java/net/Indyuce/mmocore/experience/PlayerProfessions.java

@@ -13,6 +13,7 @@ import net.Indyuce.mmocore.api.event.PlayerLevelUpEvent;
 import net.Indyuce.mmocore.api.player.PlayerData;
 import net.Indyuce.mmocore.api.util.MMOCoreUtils;
 import net.Indyuce.mmocore.loot.chest.particle.SmallParticleEffect;
+import net.Indyuce.mmocore.party.AbstractParty;
 import org.apache.commons.lang.Validate;
 import org.bukkit.Bukkit;
 import org.bukkit.ChatColor;
@@ -22,6 +23,7 @@ import org.bukkit.configuration.ConfigurationSection;
 
 import javax.annotation.Nullable;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
 
@@ -147,15 +149,15 @@ public class PlayerProfessions {
         giveExperience(profession, total, source);
     }
 
-    public void giveExperience(Profession profession, double value, EXPSource source) {
-        giveExperience(profession, value, source, null);
-    }
-
     public boolean hasReachedMaxLevel(Profession profession) {
         return profession.hasMaxLevel() && getLevel(profession) >= profession.getMaxLevel();
     }
 
-    public void giveExperience(Profession profession, double value, EXPSource source, @Nullable Location hologramLocation) {
+    public void giveExperience(Profession profession, double value, EXPSource source) {
+        giveExperience(profession, value, source, null, true);
+    }
+
+    public void giveExperience(Profession profession, double value, EXPSource source, @Nullable Location hologramLocation, boolean splitExp) {
         Validate.isTrue(playerData.isOnline(), "Cannot give experience to offline player");
         if (value <= 0)
             return;
@@ -165,23 +167,31 @@ public class PlayerProfessions {
             return;
         }
 
-        value = MMOCore.plugin.boosterManager.calculateExp(profession, value);
+        // Splitting exp through party members
+        AbstractParty party;
+        if (splitExp && (party = playerData.getParty()) != null) {
+            List<PlayerData> onlineMembers = party.getOnlineMembers();
+            value /= onlineMembers.size();
+            for (PlayerData member : onlineMembers)
+                if (!member.equals(playerData))
+                    member.getCollectionSkills().giveExperience(profession, value, source, null, false);
+        }
 
-        // Adds functionality for additional experience per profession.
+        // Apply buffs AFTER splitting exp
-        value *= 1 + playerData.getStats().getInstance("ADDITIONAL_EXPERIENCE_" + UtilityMethods.enumName(profession.getId())).getTotal() / 100;
+        value *= (1 + playerData.getStats().getStat("ADDITIONAL_EXPERIENCE_" + UtilityMethods.enumName(profession.getId())) / 100) * MMOCore.plugin.boosterManager.getMultiplier(profession);
-
-        // Display hologram
-        if (hologramLocation != null)
-            MMOCoreUtils.displayIndicator(hologramLocation.add(.5, 1.5, .5), MMOCore.plugin.configManager.getSimpleMessage("exp-hologram", "exp", "" + value).message());
 
         PlayerExperienceGainEvent event = new PlayerExperienceGainEvent(playerData, profession, value, source);
         Bukkit.getPluginManager().callEvent(event);
         if (event.isCancelled())
             return;
 
+        // Display hologram
+        if (hologramLocation != null)
+            MMOCoreUtils.displayIndicator(hologramLocation.add(.5, 1.5, .5), MMOCore.plugin.configManager.getSimpleMessage("exp-hologram", "exp", MythicLib.plugin.getMMOConfig().decimal.format(event.getExperience())).message());
+
         exp.put(profession.getId(), Math.max(0, exp.getOrDefault(profession.getId(), 0.) + event.getExperience()));
         int level, oldLevel = getLevel(profession);
-        double needed,exp;
+        double needed, exp;
 
         /*
          * Loop for exp overload when leveling up, will continue

src/main/java/net/Indyuce/mmocore/experience/Profession.java

@@ -127,7 +127,7 @@ public class Profession extends PostLoadObject implements ExperienceObject {
     public void giveExperience(PlayerData playerData, double experience, @Nullable Location hologramLocation, EXPSource source) {
         hologramLocation = !getOption(Profession.ProfessionOption.EXP_HOLOGRAMS) ? null
                 : hologramLocation;
-        playerData.getCollectionSkills().giveExperience(this, experience, EXPSource.SOURCE, hologramLocation);
+        playerData.getCollectionSkills().giveExperience(this, experience, EXPSource.SOURCE, hologramLocation, true);
     }
 
     @Override

src/main/java/net/Indyuce/mmocore/experience/dispenser/ExperienceDispenser.java

@@ -11,6 +11,8 @@ import org.jetbrains.annotations.Nullable;
  * Used to differenciate between the main class experience and
  * experience given in a specific profession. Also being used to
  * monitor EXP holograms.
+ *
+ * @deprecated Merged with {@link net.Indyuce.mmocore.experience.ExperienceObject}
  */
 @Deprecated
 public interface ExperienceDispenser {

src/main/java/net/Indyuce/mmocore/gui/PlayerStats.java

@@ -1,5 +1,6 @@
 package net.Indyuce.mmocore.gui;
 
+import io.lumine.mythic.lib.MythicLib;
 import io.lumine.mythic.lib.UtilityMethods;
 import io.lumine.mythic.lib.api.stat.modifier.StatModifier;
 import io.lumine.mythic.lib.version.VersionMaterial;
@@ -243,7 +244,7 @@ public class PlayerStats extends EditableInventory {
 				bar.append(j == chars ? "" + ChatColor.WHITE + ChatColor.BOLD : "").append("|");
 
 			holders.register("percent", decimal.format(ratio * 100));
-			holders.register("exp", "" + data.getExperience());
+			holders.register("exp", MythicLib.plugin.getMMOConfig().decimal.format(data.getExperience()));
 			holders.register("level", "" + data.getLevel());
 			holders.register("class_points", "" + data.getClassPoints());
 			holders.register("skill_points", "" + data.getSkillPoints());

src/main/java/net/Indyuce/mmocore/gui/social/guild/EditableGuildAdmin.java

@@ -1,7 +1,5 @@
 package net.Indyuce.mmocore.gui.social.guild;
 
-import io.lumine.mythic.lib.api.item.ItemTag;
-import io.lumine.mythic.lib.api.item.NBTItem;
 import net.Indyuce.mmocore.MMOCore;
 import net.Indyuce.mmocore.api.player.PlayerData;
 import net.Indyuce.mmocore.api.util.input.PlayerInput.InputType;
@@ -25,6 +23,7 @@ import org.bukkit.inventory.meta.ItemMeta;
 import org.bukkit.inventory.meta.SkullMeta;
 import org.bukkit.persistence.PersistentDataType;
 
+import java.util.List;
 import java.util.UUID;
 
 public class EditableGuildAdmin extends EditableInventory {
@@ -43,7 +42,7 @@ public class EditableGuildAdmin extends EditableInventory {
 		return new GuildViewInventory(data, this);
 	}
 
-	public static class MemberDisplayItem extends InventoryItem {
+	public static class MemberDisplayItem extends InventoryItem<GuildViewInventory> {
 		public MemberDisplayItem(MemberItem memberItem, ConfigurationSection config) {
 			super(memberItem, config);
 		}
@@ -54,8 +53,8 @@ public class EditableGuildAdmin extends EditableInventory {
 		}
 
 		@Override
-		public Placeholders getPlaceholders(GeneratedInventory inv, int n) {
+		public Placeholders getPlaceholders(GuildViewInventory inv, int n) {
-			PlayerData member = PlayerData.get(inv.getPlayerData().getGuild().getMembers().get(n));
+			PlayerData member = PlayerData.get(inv.members.get(n));
 
 			Placeholders holders = new Placeholders();
 
@@ -68,8 +67,8 @@ public class EditableGuildAdmin extends EditableInventory {
 		}
 
 		@Override
-		public ItemStack display(GeneratedInventory inv, int n) {
+		public ItemStack display(GuildViewInventory inv, int n) {
-			UUID uuid = inv.getPlayerData().getGuild().getMembers().get(n);
+			UUID uuid = inv.members.get(n);
 			OfflinePlayer offlinePlayer = Bukkit.getOfflinePlayer(uuid);
 
 			ItemStack disp = super.display(inv, n);
@@ -87,7 +86,7 @@ public class EditableGuildAdmin extends EditableInventory {
 		}
 	}
 
-	public static class MemberItem extends SimplePlaceholderItem {
+	public static class MemberItem extends SimplePlaceholderItem<GuildViewInventory> {
 		private final InventoryItem empty;
 		private final MemberDisplayItem member;
 
@@ -102,8 +101,8 @@ public class EditableGuildAdmin extends EditableInventory {
 		}
 
 		@Override
-		public ItemStack display(GeneratedInventory inv, int n) {
+		public ItemStack display(GuildViewInventory inv, int n) {
-			return inv.getPlayerData().getGuild().getMembers().count() > n ? member.display(inv, n) : empty.display(inv, n);
+			return inv.getPlayerData().getGuild().countMembers() > n ? member.display(inv, n) : empty.display(inv, n);
 		}
 
 		@Override
@@ -115,15 +114,23 @@ public class EditableGuildAdmin extends EditableInventory {
 	public class GuildViewInventory extends GeneratedInventory {
 		private final int max;
 
+		private List<UUID> members;
+
 		public GuildViewInventory(PlayerData playerData, EditableInventory editable) {
 			super(playerData, editable);
 
 			max = editable.getByFunction("member").getSlots().size();
 		}
 
+		@Override
+		public void open() {
+			members = playerData.getGuild().listMembers();
+			super.open();
+		}
+
 		@Override
 		public String calculateName() {
-			return getName().replace("{max}", "" + max).replace("{players}", "" + getPlayerData().getGuild().getMembers().count());
+			return getName().replace("{max}", "" + max).replace("{players}", "" + getPlayerData().getGuild().countMembers());
 		}
 
 		@Override
@@ -138,7 +145,7 @@ public class EditableGuildAdmin extends EditableInventory {
 
 			if (item.getFunction().equals("invite")) {
 
-				if (playerData.getGuild().getMembers().count() >= max) {
+				if (playerData.getGuild().countMembers() >= max) {
 					MMOCore.plugin.configManager.getSimpleMessage("guild-is-full").send(player);
 					player.playSound(player.getLocation(), Sound.ENTITY_VILLAGER_NO, 1, 1);
 					return;
@@ -162,7 +169,7 @@ public class EditableGuildAdmin extends EditableInventory {
 					}
 
 					PlayerData targetData = PlayerData.get(target);
-					if (playerData.getGuild().getMembers().has(target.getUniqueId())) {
+					if (playerData.getGuild().hasMember(target.getUniqueId())) {
 						MMOCore.plugin.configManager.getSimpleMessage("already-in-guild", "player", target.getName()).send(player);
 						player.playSound(player.getLocation(), Sound.ENTITY_VILLAGER_NO, 1, 1);
 						open();

src/main/java/net/Indyuce/mmocore/gui/social/guild/EditableGuildView.java

@@ -21,6 +21,7 @@ import org.bukkit.inventory.meta.ItemMeta;
 import org.bukkit.inventory.meta.SkullMeta;
 import org.bukkit.persistence.PersistentDataType;
 
+import java.util.List;
 import java.util.UUID;
 
 public class EditableGuildView extends EditableInventory {
@@ -35,7 +36,7 @@ public class EditableGuildView extends EditableInventory {
 		return function.equals("member") ? new MemberItem(config) : (function.equals("next") || function.equals("previous") || function.equals("disband") || function.equals("invite")) ? new ConditionalItem(function, config) : new SimplePlaceholderItem(config);
 	}
 
-	public static class MemberDisplayItem extends InventoryItem {
+	public static class MemberDisplayItem extends InventoryItem<GuildViewInventory> {
 		public MemberDisplayItem(MemberItem memberItem, ConfigurationSection config) {
 			super(memberItem, config);
 		}
@@ -46,8 +47,8 @@ public class EditableGuildView extends EditableInventory {
 		}
 
 		@Override
-		public Placeholders getPlaceholders(GeneratedInventory inv, int n) {
+		public Placeholders getPlaceholders(GuildViewInventory inv, int n) {
-			UUID uuid = inv.getPlayerData().getGuild().getMembers().get(n);
+			UUID uuid = inv.members.get(n);
 			Placeholders holders = new Placeholders();
 			/*
 			 * Will never be null since a players name will always be recorded
@@ -64,8 +65,8 @@ public class EditableGuildView extends EditableInventory {
 		}
 
 		@Override
-		public ItemStack display(GeneratedInventory inv, int n) {
+		public ItemStack display(GuildViewInventory inv, int n) {
-			UUID uuid = inv.getPlayerData().getGuild().getMembers().get(n);
+			UUID uuid = inv.members.get(n);
 
 			ItemStack disp = super.display(inv, n);
 			ItemMeta meta = disp.getItemMeta();
@@ -99,7 +100,7 @@ public class EditableGuildView extends EditableInventory {
 		@Override
 		public ItemStack display(GuildViewInventory inv, int n) {
 			int index = n * inv.getPage();
-			return inv.getPlayerData().getGuild().getMembers().count() > index ? member.display(inv, index) : empty.display(inv, index);
+			return inv.getPlayerData().getGuild().countMembers() > index ? member.display(inv, index) : empty.display(inv, index);
 		}
 
 		@Override
@@ -120,7 +121,7 @@ public class EditableGuildView extends EditableInventory {
 		public ItemStack display(GuildViewInventory inv, int n) {
 
 			if (function.equals("next"))
-				if (inv.getPage() == (inv.getPlayerData().getGuild().getMembers().count() + 20)
+				if (inv.getPage() == (inv.getPlayerData().getGuild().countMembers() + 20)
 						/ inv.getByFunction("member").getSlots().size())
 					return null;
 			if (function.equals("previous") && inv.getPage() == 1)
@@ -136,19 +137,26 @@ public class EditableGuildView extends EditableInventory {
 	}
 
 	public class GuildViewInventory extends GeneratedInventory {
-		private int page = 1;
 		private final int maxpages;
 
+		private int page = 1;
+		private List<UUID> members;
+
 		public GuildViewInventory(PlayerData playerData, EditableInventory editable) {
 			super(playerData, editable);
 
-			maxpages = (playerData.getGuild().getMembers().count() + 20)
+			maxpages = (playerData.getGuild().countMembers() + 20) / editable.getByFunction("member").getSlots().size();
-					/ editable.getByFunction("member").getSlots().size();
+		}
+
+		@Override
+		public void open() {
+			members = playerData.getGuild().listMembers();
+			super.open();
 		}
 
 		@Override
 		public String calculateName() {
-			return getName().replace("{online_players}", "" + getPlayerData().getGuild().getMembers().countOnline()).replace("{page}", "" + page).replace("{maxpages}", "" + maxpages).replace("{players}", "" + getPlayerData().getGuild().getMembers().count()).replace("{tag}", getPlayerData().getGuild().getTag()).replace("{name}", getPlayerData().getGuild().getName());
+			return getName().replace("{online_players}", "" + getPlayerData().getGuild().countOnlineMembers()).replace("{page}", "" + page).replace("{maxpages}", "" + maxpages).replace("{players}", String.valueOf(getPlayerData().getGuild().countMembers())).replace("{tag}", getPlayerData().getGuild().getTag()).replace("{name}", getPlayerData().getGuild().getName());
 		}
 
 		@Override
@@ -209,7 +217,7 @@ public class EditableGuildView extends EditableInventory {
 					}
 
 					PlayerData targetData = PlayerData.get(target);
-					if (playerData.getGuild().getMembers().has(targetData.getUniqueId())) {
+					if (playerData.getGuild().hasMember(targetData.getUniqueId())) {
 						MMOCore.plugin.configManager.getSimpleMessage("already-in-guild", "player", target.getName()).send(player);
 						player.playSound(player.getLocation(), Sound.ENTITY_VILLAGER_NO, 1, 1);
 						open();

src/main/java/net/Indyuce/mmocore/gui/social/party/EditablePartyView.java

@@ -172,6 +172,13 @@ public class EditablePartyView extends EditableInventory {
                         return;
                     }
 
+                    if (Math.abs(targetData.getLevel() - party.getLevel()) > MMOCore.plugin.configManager.maxPartyLevelDifference) {
+                        MMOCore.plugin.configManager.getSimpleMessage("high-level-difference", "player", target.getName()).send(player);
+                        player.playSound(player.getLocation(), Sound.ENTITY_VILLAGER_NO, 1, 1);
+                        open();
+                        return;
+                    }
+
                     party.sendInvite(playerData, targetData);
                     MMOCore.plugin.configManager.getSimpleMessage("sent-party-invite", "player", target.getName()).send(player);
                     player.playSound(player.getLocation(), Sound.ENTITY_EXPERIENCE_ORB_PICKUP, 1, 1);

src/main/java/net/Indyuce/mmocore/guild/AbstractGuild.java

@@ -1,4 +1,11 @@
 package net.Indyuce.mmocore.guild;
 
+import org.bukkit.entity.Player;
+
 public interface AbstractGuild {
+
+    /**
+     * @return If given player is in that party
+     */
+    boolean hasMember(Player player);
 }

src/main/java/net/Indyuce/mmocore/guild/GuildModuleType.java

@@ -1,7 +1,7 @@
 package net.Indyuce.mmocore.guild;
 
-import net.Indyuce.mmocore.guild.compat.FactionsGuildModule;
 import net.Indyuce.mmocore.guild.compat.GuildsGuildModule;
+import net.Indyuce.mmocore.guild.compat.KingdomsXGuildModule;
 import net.Indyuce.mmocore.guild.compat.UltimateClansGuildModule;
 import net.Indyuce.mmocore.guild.provided.MMOCoreGuildModule;
 import org.bukkit.Bukkit;
@@ -9,9 +9,10 @@ import org.bukkit.Bukkit;
 import javax.inject.Provider;
 
 public enum GuildModuleType {
-    FACTIONS("Factions", FactionsGuildModule::new),
+    // Useless since MythicLib already supports FactionBridge
+    // FACTIONS("Factions", FactionsGuildModule::new),
     GUILDS("Guilds", GuildsGuildModule::new),
-    KINGDOMSX("Guilds", GuildsGuildModule::new),
+    KINGDOMSX("KingdomsX", KingdomsXGuildModule::new),
     MMOCORE("MMOCore", MMOCoreGuildModule::new),
     ULTIMATE_CLANS("UltimateClans", UltimateClansGuildModule::new),
     ;

src/main/java/net/Indyuce/mmocore/guild/compat/FactionsGuildModule.java

@@ -6,13 +6,20 @@ import com.massivecraft.factions.Faction;
 import net.Indyuce.mmocore.api.player.PlayerData;
 import net.Indyuce.mmocore.guild.AbstractGuild;
 import net.Indyuce.mmocore.guild.GuildModule;
+import org.apache.commons.lang.NotImplementedException;
+import org.bukkit.entity.Player;
 import org.jetbrains.annotations.NotNull;
 
+import java.util.Objects;
+
 public class FactionsGuildModule implements GuildModule {
 
     @Override
     public AbstractGuild getGuild(PlayerData playerData) {
         FPlayer fPlayer = FPlayers.getInstance().getByPlayer(playerData.getPlayer());
+        if (fPlayer == null)
+            return null;
+
         return fPlayer.hasFaction() ? new CustomGuild(fPlayer.getFaction()) : null;
     }
 
@@ -22,7 +29,12 @@ public class FactionsGuildModule implements GuildModule {
         private final Faction faction;
 
         CustomGuild(Faction faction) {
-            this.faction = faction;
+            this.faction = Objects.requireNonNull(faction);
+        }
+
+        @Override
+        public boolean hasMember(Player player) {
+            throw new NotImplementedException();
         }
     }
 }

src/main/java/net/Indyuce/mmocore/guild/compat/GuildsGuildModule.java

@@ -5,8 +5,11 @@ import me.glaremasters.guilds.guild.Guild;
 import net.Indyuce.mmocore.api.player.PlayerData;
 import net.Indyuce.mmocore.guild.AbstractGuild;
 import net.Indyuce.mmocore.guild.GuildModule;
+import org.bukkit.entity.Player;
 import org.jetbrains.annotations.NotNull;
 
+import java.util.Objects;
+
 public class GuildsGuildModule implements GuildModule {
 
     @Override
@@ -21,7 +24,12 @@ public class GuildsGuildModule implements GuildModule {
         private final Guild guild;
 
         CustomGuild(Guild guild) {
-            this.guild = guild;
+            this.guild = Objects.requireNonNull(guild);
+        }
+
+        @Override
+        public boolean hasMember(Player player) {
+            return guild.getMember(player.getUniqueId()) != null;
         }
     }
 }

src/main/java/net/Indyuce/mmocore/guild/compat/KingdomsXGuildModule.java

@@ -3,18 +3,23 @@ package net.Indyuce.mmocore.guild.compat;
 import net.Indyuce.mmocore.api.player.PlayerData;
 import net.Indyuce.mmocore.guild.AbstractGuild;
 import net.Indyuce.mmocore.guild.GuildModule;
+import org.bukkit.entity.Player;
 import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
 import org.kingdoms.constants.kingdom.Kingdom;
 import org.kingdoms.constants.player.KingdomPlayer;
 import org.kingdoms.main.Kingdoms;
 
+import java.util.Objects;
+
 public class KingdomsXGuildModule implements GuildModule {
 
     @Override
     public AbstractGuild getGuild(PlayerData playerData) {
         KingdomPlayer kPlayer = Kingdoms.get().getDataHandlers().getKingdomPlayerManager().getData(playerData.getUniqueId());
-        Kingdom kingdom = kPlayer == null ? null : kPlayer.getKingdom();
+        if (kPlayer == null)
+            return null;
+
+        Kingdom kingdom = kPlayer.getKingdom();
         return kingdom == null ? null : new CustomGuild(kingdom);
     }
 
@@ -24,7 +29,12 @@ public class KingdomsXGuildModule implements GuildModule {
         private final Kingdom kingdom;
 
         CustomGuild(Kingdom kingdom) {
-            this.kingdom = kingdom;
+            this.kingdom = Objects.requireNonNull(kingdom);
+        }
+
+        @Override
+        public boolean hasMember(Player player) {
+            return kingdom.isMember(player);
         }
     }
 }

src/main/java/net/Indyuce/mmocore/guild/compat/UltimateClansGuildModule.java

@@ -6,8 +6,11 @@ import net.Indyuce.mmocore.api.player.PlayerData;
 import net.Indyuce.mmocore.guild.AbstractGuild;
 import net.Indyuce.mmocore.guild.GuildModule;
 import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
 import org.jetbrains.annotations.NotNull;
 
+import java.util.Objects;
+
 public class UltimateClansGuildModule implements GuildModule {
     private static final UClans API = (UClans) Bukkit.getPluginManager().getPlugin("UltimateCLans");
 
@@ -22,7 +25,13 @@ public class UltimateClansGuildModule implements GuildModule {
         private final ClanData clan;
 
         CustomGuild(ClanData clan) {
-            this.clan = clan;
+            this.clan = Objects.requireNonNull(clan);
+        }
+
+        @Override
+        public boolean hasMember(Player player) {
+            // List implementation. Pretty bad
+            return clan.getMembers().contains(player);
         }
     }
 }

src/main/java/net/Indyuce/mmocore/guild/provided/Guild.java

@@ -1,29 +1,25 @@
 package net.Indyuce.mmocore.guild.provided;
 
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.UUID;
-import java.util.function.Consumer;
-
-import net.Indyuce.mmocore.guild.AbstractGuild;
-import org.bukkit.Bukkit;
-import org.bukkit.entity.Player;
-
 import net.Indyuce.mmocore.MMOCore;
 import net.Indyuce.mmocore.api.ConfigMessage;
 import net.Indyuce.mmocore.api.player.PlayerData;
 import net.Indyuce.mmocore.api.player.social.Request;
 import net.Indyuce.mmocore.gui.api.PluginInventory;
 import net.Indyuce.mmocore.gui.social.guild.EditableGuildView.GuildViewInventory;
+import net.Indyuce.mmocore.guild.AbstractGuild;
 import net.Indyuce.mmocore.manager.InventoryManager;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+
+import java.util.*;
+import java.util.function.Consumer;
 
 public class Guild implements AbstractGuild {
-	private final GuildMembers members = new GuildMembers();
     private final Map<UUID, Long> invites = new HashMap<>();
     private final String guildId, guildName, guildTag;
 
+    private final Set<UUID> members = new HashSet<>();
+
     /**
      * Owner changes when the old owner leaves guild
      */
@@ -52,10 +48,6 @@ public class Guild implements AbstractGuild {
         return guildTag;
     }
 
-	public GuildMembers getMembers() {
-		return members;
-	}
-
     public long getLastInvite(Player player) {
         return invites.containsKey(player.getUniqueId()) ? invites.get(player.getUniqueId()) : 0;
     }
@@ -64,8 +56,9 @@ public class Guild implements AbstractGuild {
         invites.remove(player.getUniqueId());
     }
 
-	public void removeMember(UUID uuid)
+    public void removeMember(UUID uuid) {
-	{ removeMember(uuid, false); }
+        removeMember(uuid, false);
+    }
 
     // Disband boolean is to prevent co-modification exception when disbanding a guild
     public void removeMember(UUID uuid, boolean disband) {
@@ -73,24 +66,23 @@ public class Guild implements AbstractGuild {
         if (data != null && data.isOnline() && data.getPlayer().getOpenInventory() != null && data.getPlayer().getOpenInventory().getTopInventory().getHolder() instanceof GuildViewInventory)
             InventoryManager.GUILD_CREATION.newInventory(data).open();
 
-		if(!disband) members.remove(uuid);
+        if (!disband)
-		if(data != null) data.setGuild(null);
+            members.remove(uuid);
+        if (data != null)
+            data.setGuild(null);
         reopenInventories();
 
-		//if(!disband) {
+        // Disband the guild if no member left
-
+        if (members.size() < 1) {
-			// disband the guild if no member left
-			if (members.count() < 1) {
             MMOCore.plugin.dataProvider.getGuildManager().unregisterGuild(this);
             return;
         }
 
-			// transfer ownership
+        // Transfer ownership
         if (owner.equals(uuid)) {
-				owner = members.get(0);
+            owner = members.stream().findAny().get();
             MMOCore.plugin.configManager.getSimpleMessage("transfer-guild-ownership").send(Bukkit.getPlayer(owner));
         }
-		//}
     }
 
     public void addMember(UUID uuid) {
@@ -109,7 +101,7 @@ public class Guild implements AbstractGuild {
     }
 
     public void reopenInventories() {
-		for (UUID uuid : members.members) {
+        for (UUID uuid : members) {
             PlayerData member = PlayerData.get(uuid);
             if (member != null && member.isOnline() && member.getPlayer().getOpenInventory() != null && member.getPlayer().getOpenInventory().getTopInventory().getHolder() instanceof GuildViewInventory)
                 ((PluginInventory) member.getPlayer().getOpenInventory().getTopInventory().getHolder()).open();
@@ -123,42 +115,34 @@ public class Guild implements AbstractGuild {
         MMOCore.plugin.requestManager.registerRequest(request);
     }
 
-	public static class GuildMembers {
+    @Override
-		private final List<UUID> members = new ArrayList<>();
+    public boolean hasMember(Player player) {
-
+        return hasMember(player.getUniqueId());
-		public UUID get(int count) {
-			return members.get(count);
     }
 
-		public boolean has(UUID player) {
+    public boolean hasMember(UUID player) {
         return members.contains(player);
     }
 
-		public void add(UUID player) {
+    public List<UUID> listMembers() {
-			members.add(player);
+        return new ArrayList<>(members);
     }
 
-		public void remove(UUID player) {
+    public void forEachMember(Consumer<? super UUID> action) {
-			members.remove(player);
-		}
-
-		public void forEach(Consumer<? super UUID> action) {
         members.forEach(action);
     }
 
-		public int countOnline() {
+    public int countOnlineMembers() {
         int online = 0;
 
-			for(UUID member : members)
+        for (UUID member : members)
-				if(Bukkit.getOfflinePlayer(member).isOnline())
+            if (Bukkit.getOfflinePlayer(member).isOnline())
-					online += 1;
+                online++;
 
         return online;
     }
 
-		public int count()
+    public int countMembers() {
-		{ return members.size(); }
+        return members.size();
-		public void clear()
-		{ members.clear(); }
     }
 }

src/main/java/net/Indyuce/mmocore/guild/provided/GuildInvite.java

@@ -27,7 +27,7 @@ public class GuildInvite extends Request {
     @Override
     public void whenAccepted() {
         guild.removeLastInvite(getCreator().getPlayer());
-        guild.getMembers().forEach(member -> {
+        guild.forEachMember(member -> {
                     if (Bukkit.getPlayer(member) != null) {
                         MMOCore.plugin.configManager.getSimpleMessage("guild-joined-other", "player",
                                 getTarget().getPlayer().getName()).send(Bukkit.getPlayer(member));

src/main/java/net/Indyuce/mmocore/listener/GuildListener.java

@@ -32,7 +32,7 @@ public class GuildListener implements Listener {
 			GuildChatEvent called = new GuildChatEvent(data, format.message());
 			Bukkit.getPluginManager().callEvent(called);
 			if (!called.isCancelled())
-				data.getGuild().getMembers().forEach(member -> {
+				data.getGuild().forEachMember(member -> {
 					Player p = Bukkit.getPlayer(member);
 					if (p != null)
 						format.send(p);

src/main/java/net/Indyuce/mmocore/listener/profession/FishingListener.java

@@ -197,7 +197,7 @@ public class FishingListener implements Listener {
                 location.getWorld().spawnParticle(Particle.FIREWORKS_SPARK, location, 0, 4 * (RANDOM.nextDouble() - .5), RANDOM.nextDouble() + 1, 4 * (RANDOM.nextDouble() - .5), .08);
 
             if (MMOCore.plugin.fishingManager.hasLinkedProfession())
-                playerData.getCollectionSkills().giveExperience(MMOCore.plugin.fishingManager.getLinkedProfession(), experienceDropped, EXPSource.FISHING, location);
+                playerData.getCollectionSkills().giveExperience(MMOCore.plugin.fishingManager.getLinkedProfession(), experienceDropped, EXPSource.FISHING, location, true);
         }
     }
 }

src/main/java/net/Indyuce/mmocore/manager/ConfigManager.java

@@ -23,11 +23,12 @@ import java.util.logging.Level;
 public class ConfigManager {
     public final CommandVerbose commandVerbose = new CommandVerbose();
 
-    public boolean overrideVanillaExp, canCreativeCast, cobbleGeneratorXP, saveDefaultClassInfo;
+    public boolean overrideVanillaExp, canCreativeCast, cobbleGeneratorXP, saveDefaultClassInfo, attributesAsClassInfo;
     public String partyChatPrefix, noSkillBoundPlaceholder;
     public ChatColor staminaFull, staminaHalf, staminaEmpty;
     public long combatLogTimer, lootChestExpireTime, lootChestPlayerCooldown, globalSkillCooldown;
     public double lootChestsChanceWeight;
+    public int maxPartyLevelDifference;
 
     private final FileConfiguration messages;
     private final boolean chatInput;
@@ -99,6 +100,7 @@ public class ConfigManager {
         globalSkillCooldown = MMOCore.plugin.getConfig().getLong("global-skill-cooldown") * 50;
         noSkillBoundPlaceholder = getSimpleMessage("no-skill-placeholder").message();
         lootChestsChanceWeight = MMOCore.plugin.getConfig().getDouble("chance-stat-weight.loot-chests");
+        maxPartyLevelDifference = MMOCore.plugin.getConfig().getInt("party.max-level-difference");
 
         staminaFull = getColorOrDefault("stamina-whole", ChatColor.GREEN);
         staminaHalf = getColorOrDefault("stamina-half", ChatColor.DARK_GREEN);

src/main/java/net/Indyuce/mmocore/manager/MMOLoadManager.java

@@ -41,6 +41,7 @@ public class MMOLoadManager {
 		return load(Objective.class, config, loader -> loader.loadObjective(config, section));
 	}
 
+	@Deprecated
 	public ExperienceSource<?> loadExperienceSource(MMOLineConfig config, ExperienceDispenser dispenser) {
 		return load(ExperienceSource.class, config, loader -> loader.loadExperienceSource(config, dispenser));
 	}

src/main/java/net/Indyuce/mmocore/manager/data/GuildDataManager.java

@@ -33,7 +33,7 @@ public abstract class GuildDataManager {
 	}
 
 	public void unregisterGuild(Guild guild) {
-		guild.getMembers().forEach(member -> guild.removeMember(member, true));
+		guild.forEachMember(member -> guild.removeMember(member, true));
 		// guild.getMembers().clear();
 		guilds.remove(guild.getId());
 		delete(guild);

src/main/java/net/Indyuce/mmocore/manager/data/yaml/YAMLGuildDataManager.java

@@ -22,7 +22,7 @@ public class YAMLGuildDataManager extends GuildDataManager {
 		config.getConfig().set("owner", guild.getOwner().toString());
 
 		List<String> memberList = new ArrayList<>();
-		guild.getMembers().forEach(uuid -> memberList.add(uuid.toString()));
+		guild.forEachMember(uuid -> memberList.add(uuid.toString()));
 		config.getConfig().set("members", memberList);
 
 		config.save();

src/main/java/net/Indyuce/mmocore/manager/data/yaml/YAMLPlayerDataManager.java

@@ -47,7 +47,7 @@ public class YAMLPlayerDataManager extends PlayerDataManager {
 
 		if (config.contains("guild")) {
 			Guild guild = provider.getGuildManager().getGuild(config.getString("guild"));
-			data.setGuild(guild.getMembers().has(data.getUniqueId()) ? guild : null);
+			data.setGuild(guild.hasMember(data.getUniqueId()) ? guild : null);
 		}
 		if (config.contains("attribute"))
 			data.getAttributes().load(config.getConfigurationSection("attribute"));

src/main/java/net/Indyuce/mmocore/manager/social/BoosterManager.java

@@ -2,6 +2,7 @@ package net.Indyuce.mmocore.manager.social;
 
 import net.Indyuce.mmocore.experience.Booster;
 import net.Indyuce.mmocore.experience.Profession;
+import org.jetbrains.annotations.Nullable;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -48,7 +49,7 @@ public class BoosterManager {
 	/**
 	 * @return Sums all current experience boosters values
 	 */
-	public double getMultiplier(Profession profession) {
+	public double getMultiplier(@Nullable Profession profession) {
 		double d = 1;
 
 		for (Booster booster : map)
@@ -58,10 +59,6 @@ public class BoosterManager {
 		return d;
 	}
 
-	public double calculateExp(Profession profession, double exp) {
-		return (exp * getMultiplier(profession));
-	}
-
 	/**
 	 * @return Collection of currently registered boosters. Some of them can be
 	 *         expired but are not unregistered yet!

src/main/java/net/Indyuce/mmocore/party/MMOCoreTargetRestriction.java

@@ -4,6 +4,7 @@ import io.lumine.mythic.lib.comp.target.InteractionType;
 import io.lumine.mythic.lib.comp.target.TargetRestriction;
 import net.Indyuce.mmocore.MMOCore;
 import net.Indyuce.mmocore.api.player.PlayerData;
+import net.Indyuce.mmocore.guild.AbstractGuild;
 import org.bukkit.entity.LivingEntity;
 import org.bukkit.entity.Player;
 
@@ -11,11 +12,21 @@ public class MMOCoreTargetRestriction implements TargetRestriction {
 
     @Override
     public boolean canTarget(Player player, LivingEntity livingEntity, InteractionType interactionType) {
-        if (!interactionType.isOffense() || !(livingEntity instanceof Player) || livingEntity.hasMetadata("NPC"))
+        if (!interactionType.isOffense() || !(livingEntity instanceof Player))
             return true;
 
-        AbstractParty party = MMOCore.plugin.partyModule.getParty(PlayerData.get(player));
+        PlayerData data = PlayerData.get(player);
-        // TODO check for guild
+
-        return party == null || !party.hasMember((Player) livingEntity);
+        // Check for party
+        AbstractParty party = MMOCore.plugin.partyModule.getParty(data);
+        if (party != null && party.hasMember((Player) livingEntity))
+            return false;
+
+        // Check for guild
+        AbstractGuild guild = MMOCore.plugin.guildModule.getGuild(data);
+        if (guild != null && guild.hasMember((Player) livingEntity))
+            return false;
+
+        return true;
     }
 }

src/main/java/net/Indyuce/mmocore/party/provided/Party.java

@@ -9,6 +9,7 @@ import net.Indyuce.mmocore.gui.social.party.EditablePartyView.PartyViewInventory
 import net.Indyuce.mmocore.manager.InventoryManager;
 import net.Indyuce.mmocore.party.AbstractParty;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.*;
 import java.util.function.Consumer;
@@ -25,13 +26,21 @@ public class Party implements AbstractParty {
     /**
      * Owner has to change when previous owner leaves party
      */
+    @NotNull
     private PlayerData owner;
 
+    /**
+     * If the difference between a player level and the party
+     * level is too high then players cannot join the party.
+     */
+    private final int partyLevel;
+
     private final MMOCorePartyModule module;
 
     public Party(MMOCorePartyModule module, PlayerData owner) {
         this.owner = owner;
         this.module = module;
+        this.partyLevel = owner.getLevel();
 
         addMember(owner);
     }
@@ -59,6 +68,10 @@ public class Party implements AbstractParty {
         return online;
     }
 
+    public int getLevel() {
+        return partyLevel;
+    }
+
     @Override
     public int countMembers() {
         return members.size();

src/main/resources/config.yml

@@ -59,14 +59,22 @@ protect-custom-mine: false
 # - mcmmo
 party-plugin: mmocore
 
-## Edit the plugin handling parties here.
+# Edit the plugin handling parties here.
-## Supported values (just copy and paste):
+# Supported values (just copy and paste):
-## - mmocore
+# - mmocore
-## - beauty_quest
+# - beauty_quest
-## - quest_creator
+# - quest_creator
-## - quests
+# - quests
 quest-plugin: mmocore
 
+# Edit the plugin handling guilds here.
+# Supported values (just copy and paste):
+# - mmocore
+# - guilds
+# - kingdomsx
+# - ultimate_clans
+guild-plugin: mmocore
+
 # MythicLib introduces a CHANCE stat that is used in
 # several different systems in MMOCore. By changing these
 # weights you can define how much the Chance stat impacts
@@ -135,10 +143,21 @@ party:
   # to talk in the party chat.
   chat-prefix: '@'
 
-  # The max players that can be in
+  # The max amount of players in a party
-  # any given party. Between 2-8.
+  # Has to be higher than 2
   max-players: 8
 
+  # If the difference between a player's level and the
+  # initial party owner's level is higher that this
+  # value, then that player can't join the party.
+  #
+  # This prevents low level players from joining
+  # high level players and earning tons of EXP.
+  #
+  # Set to the max level possible if you want to disable
+  # that feature.
+  max-level-difference: 3
+
 # Redirects vanilla experience obtained to MMOCore
 # class experience. You can define the % of the vanilla
 # experience that is being transfered as MMOCore exp.
@@ -206,6 +225,11 @@ resource-bar-colors:
   stamina-half: 'DARK_GREEN'
   stamina-empty: 'WHITE'
 
+# When set to true, attributes are saved and
+# reset when a player changes their class.
+# Not implemented yet.
+# attributes-as-class-info: true
+
 # Whether or not the admin commands should display
 # the result of the command when ran.
 # For Example: "Players Level is now 10."

src/main/resources/default/messages.yml

@@ -118,6 +118,7 @@ party-joined-other: '&6{player}&e joined your party!'
 transfer-party-ownership: '&eYou were transfered the party ownership.'
 kick-from-party: '&eYou successfully kicked &6{player}&e.'
 party-invite-cooldown: '&cPlease wait {cooldown} before inviting {player}.'
+high-level-difference: '&cYou cannot invite {player} as the level difference is too high.'
 
 # Guilds
 guild-chat: '&a[{tag}] {player}: {message}'