Fixed /skills not working when a class has too many slots configured

MMOCore-API/src/main/java/net/Indyuce/mmocore/api/player/PlayerData.java

@@ -1220,7 +1220,7 @@ public class PlayerData extends SynchronizedDataHolder implements OfflinePlayerD
      */
     public void bindSkill(int slot, @NotNull ClassSkill skill) {
         Validate.notNull(skill, "Skill cannot be null");
-        if (slot < 0) return;
+        if (slot <= 0) return;
 
         // Unbinds the previous skill (important for passive skills)
         unbindSkill(slot);

MMOCore-API/src/main/java/net/Indyuce/mmocore/api/player/profess/PlayerClass.java

@@ -32,6 +32,7 @@ import net.Indyuce.mmocore.skill.RegisteredSkill;
 import net.Indyuce.mmocore.skill.binding.SkillSlot;
 import net.Indyuce.mmocore.skill.cast.ComboMap;
 import net.Indyuce.mmocore.skilltree.tree.SkillTree;
+import net.Indyuce.mmocore.util.ConfigUtils;
 import net.md_5.bungee.api.ChatColor;
 import org.bukkit.Location;
 import org.bukkit.Material;
@@ -66,7 +67,7 @@ public class PlayerClass extends PostLoadObject implements ExperienceObject {
     @Nullable
     private final CastingParticle castParticle;
 
-    private final Map<Integer, SkillSlot> skillSlots = new HashMap<>();
+    private final List<SkillSlot> skillSlots = new ArrayList<>();
     private final List<SkillTree> skillTrees = new ArrayList<>();
     private final List<PassiveSkill> classScripts = new LinkedList();
     private final Map<String, LinearValue> stats = new HashMap<>();
@@ -174,15 +175,13 @@ public class PlayerClass extends PostLoadObject implements ExperienceObject {
                 }
 
         // Skill slots
-        for (int i = 1; i < MMOCore.plugin.configManager.maxSkillSlots + 1; i++)
+        if (config.isConfigurationSection("skill-slots"))
-            try {
+            ConfigUtils.iterateConfigSectionList(
-                if (config.contains("skill-slots." + i))
+                    config.getConfigurationSection("skill-slots"),
-                    skillSlots.put(i, new SkillSlot(config.getConfigurationSection("skill-slots." + i)));
+                    skillSlots,
-                else
+                    SkillSlot::new,
-                    skillSlots.put(i, new SkillSlot(i, 0, "true", "&eSkill Slot " + MMOCoreUtils.intToRoman(i), new ArrayList<>(), false, true, new ArrayList<>()));
+                    index -> new SkillSlot(index, 0, "true", "&eUnconfigured Skill Slot " + MMOCoreUtils.intToRoman(index), new ArrayList<>(), false, true, new ArrayList<>()),
-            } catch (RuntimeException exception) {
+                    (key, exception) -> MMOCore.plugin.getLogger().log(Level.WARNING, "Could not load skill slot '" + key + "' from class '" + getId() + "': " + exception.getMessage()));
-                MMOCore.plugin.getLogger().log(Level.WARNING, "Could not load skill slot '" + String.valueOf(i) + "' from class '" + getId() + "': " + exception.getMessage());
-            }
 
         // Class skills
         for (RegisteredSkill registered : MMOCore.plugin.skillManager.getAll()) {
@@ -426,19 +425,21 @@ public class PlayerClass extends PostLoadObject implements ExperienceObject {
     }
 
     public boolean hasSlot(int slot) {
-        return skillSlots.containsKey(slot);
+        return 1 <= slot && slot <= skillSlots.size();
     }
 
     public List<SkillTree> getSkillTrees() {
         return skillTrees;
     }
 
+    @Nullable
     public SkillSlot getSkillSlot(int slot) {
-        return skillSlots.get(slot);
+        return hasSlot(slot) ? skillSlots.get(slot - 1) : null;
     }
 
-    public Collection<SkillSlot> getSlots() {
+    @NotNull
-        return skillSlots.values();
+    public List<SkillSlot> getSlots() {
+        return skillSlots;
     }
 
     @NotNull

MMOCore-API/src/main/java/net/Indyuce/mmocore/api/quest/trigger/UnlockSlotTrigger.java

@@ -19,7 +19,7 @@ public class UnlockSlotTrigger extends Trigger implements Removable {
         }catch(NumberFormatException e){
             throw new IllegalArgumentException("The slot should be a number");
         }
-        Validate.isTrue(slot > 0 && slot <= MMOCore.plugin.configManager.maxSkillSlots, "The slot should be between 1 and " + MMOCore.plugin.configManager.maxSkillSlots);
+        Validate.isTrue(slot > 0, "Slot number must be positive");
     }
 
     @Override

MMOCore-API/src/main/java/net/Indyuce/mmocore/command/rpg/admin/SlotCommandTreeNode.java

@@ -53,10 +53,6 @@ public class SlotCommandTreeNode extends CommandTreeNode {
                 sender.sendMessage(ChatColor.RED + "The slot can't be negative.");
                 return CommandResult.FAILURE;
             }
-            if (slot > MMOCore.plugin.configManager.maxSkillSlots) {
-                sender.sendMessage(ChatColor.RED + "The slot can't be higher than " + MMOCore.plugin.configManager.maxSkillSlots + ".");
-                return CommandResult.FAILURE;
-            }
             SkillSlot skillSlot = playerData.getProfess().getSkillSlot(slot);
             if(skillSlot.isUnlockedByDefault()){
                 sender.sendMessage(ChatColor.RED + "You can't lock a skill that is unlocked by default.");

MMOCore-API/src/main/java/net/Indyuce/mmocore/gui/SkillList.java

@@ -213,8 +213,8 @@ public class SkillList extends EditableInventory {
 
         @Override
         public ItemStack display(SkillViewerInventory inv, int n) {
-            final @NotNull SkillSlot skillSlot = inv.getPlayerData().getProfess().getSkillSlot(n + 1);
+            final @Nullable SkillSlot skillSlot = inv.getPlayerData().getProfess().getSkillSlot(n + 1);
-            if (!inv.getPlayerData().hasUnlocked(skillSlot))
+            if (skillSlot == null || !inv.getPlayerData().hasUnlocked(skillSlot))
                 return new ItemStack(Material.AIR);
 
             final @Nullable ClassSkill boundSkill = inv.getPlayerData().getBoundSkill(n + 1);

MMOCore-API/src/main/java/net/Indyuce/mmocore/manager/ConfigManager.java

@@ -34,7 +34,7 @@ public class ConfigManager {
     public long combatLogTimer, lootChestExpireTime, lootChestPlayerCooldown, globalSkillCooldown;
     public double lootChestsChanceWeight, dropItemsChanceWeight, fishingDropsChanceWeight, partyMaxExpSplitRange, pvpModeToggleOnCooldown, pvpModeToggleOffCooldown, pvpModeCombatCooldown,
             pvpModeCombatTimeout, pvpModeInvulnerabilityTimeRegionChange, pvpModeInvulnerabilityTimeCommand, pvpModeRegionEnterCooldown, pvpModeRegionLeaveCooldown;
-    public int maxPartyLevelDifference, maxPartyPlayers, maxSkillSlots, minCombatLevel, maxCombatLevelDifference, skillTreeScrollStepX, skillTreeScrollStepY;
+    public int maxPartyLevelDifference, maxPartyPlayers, minCombatLevel, maxCombatLevelDifference, skillTreeScrollStepX, skillTreeScrollStepY;
     public final List<EntityDamageEvent.DamageCause> combatLogDamageCauses = new ArrayList<>();
 
     private final FileConfiguration messages;
@@ -160,7 +160,6 @@ public class ConfigManager {
         canCreativeCast = MMOCore.plugin.getConfig().getBoolean("can-creative-cast");
         cobbleGeneratorXP = MMOCore.plugin.getConfig().getBoolean("should-cobblestone-generators-give-exp");
         saveDefaultClassInfo = MMOCore.plugin.getConfig().getBoolean("save-default-class-info");
-        maxSkillSlots = MMOCore.plugin.getConfig().getInt("max-skill-slots");
         overrideVanillaExp = MMOCore.plugin.getConfig().getBoolean("override-vanilla-exp");
     }
 

MMOCore-API/src/main/java/net/Indyuce/mmocore/util/ConfigUtils.java

@@ -0,0 +1,42 @@
+package net.Indyuce.mmocore.util;
+
+import net.Indyuce.mmocore.MMOCore;
+import org.apache.commons.lang.Validate;
+import org.bukkit.configuration.ConfigurationSection;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.List;
+import java.util.function.BiConsumer;
+import java.util.function.Function;
+import java.util.logging.Level;
+
+public class ConfigUtils {
+
+    public static <T> void iterateConfigSectionList(@NotNull ConfigurationSection config,
+                                                    @NotNull List<T> list,
+                                                    @NotNull Function<ConfigurationSection, T> subconfigHandler,
+                                                    @NotNull Function<Integer, T> fill,
+                                                    @NotNull BiConsumer<String, RuntimeException> errorHandler) {
+        int expectedOrdinal = 1;
+
+        for (String key : config.getKeys(false))
+            try {
+                final int index = Integer.parseInt(key);
+                final ConfigurationSection subconfig = config.getConfigurationSection(key);
+                Validate.notNull(subconfig, "Not a configuration section");
+                MMOCore.plugin.getLogger().log(Level.INFO, "Received " + index);
+
+                // Replace
+                if (index < expectedOrdinal) list.set(index, subconfigHandler.apply(subconfig));
+                else {
+                    while (expectedOrdinal < index)
+                        list.add(fill.apply(expectedOrdinal++));
+                    list.add(subconfigHandler.apply(subconfig));
+                    expectedOrdinal++;
+                }
+
+            } catch (RuntimeException exception) {
+                errorHandler.accept(key, exception);
+            }
+    }
+}

MMOCore-Dist/src/main/resources/config.yml

@@ -229,9 +229,6 @@ death-exp-loss:
   # Percentage of current EXP you lose when dying.
   percent: 30
 
-# Maximum number of skill slots. This means that you cannot unlock more than X skill slots.
-max-skill-slots: 8
-
 # When set to true, passive skills must be bound in order to take effect.
 # When set to false, unlocked skills will take effect right away.
 # This is only the default behavior for skills but can be overridden by specifying true/false to