Basic implementation of character emblems

src/main/java/emu/nebula/GameConstants.java

@@ -22,6 +22,10 @@ public class GameConstants {
     public static final int MAX_ENERGY = 240;
     public static final int ENERGY_REGEN_TIME = 360; // Seconds
     
+    public static final int CHARACTER_MAX_GEMS_PER_SLOT = 4;
+    public static final int CHARACTER_MAX_GEM_PRESETS = 3;
+    public static final int CHARACTER_MAX_GEM_SLOTS = 3;
+    
     public static final int MAX_FORMATIONS = 5;
     public static final int MAX_SHOWCASE_IDS = 5;
     

src/main/java/emu/nebula/data/GameData.java

@@ -28,6 +28,12 @@ public class GameData {
     @Getter private static DataTable<TalentGroupDef> TalentGroupDataTable = new DataTable<>();
     @Getter private static DataTable<TalentDef> TalentDataTable = new DataTable<>();
     
+    @Getter private static DataTable<CharGemDef> CharGemDataTable = new DataTable<>();
+    @Getter private static DataTable<CharGemSlotControlDef> CharGemSlotControlDataTable = new DataTable<>();
+    @Getter private static DataTable<CharGemAttrGroupDef> CharGemAttrGroupDataTable = new DataTable<>();
+    @Getter private static DataTable<CharGemAttrTypeDef> CharGemAttrTypeDataTable = new DataTable<>();
+    @Getter private static DataTable<CharGemAttrValueDef> CharGemAttrValueDataTable = new DataTable<>();
+    
     @Getter private static DataTable<ChatDef> ChatDataTable = new DataTable<>();
     
     // Discs

src/main/java/emu/nebula/data/resources/CharGemAttrGroupDef.java

@@ -0,0 +1,79 @@
+package emu.nebula.data.resources;
+
+import java.util.List;
+
+import emu.nebula.data.BaseDef;
+import emu.nebula.data.GameData;
+import emu.nebula.data.ResourceType;
+import emu.nebula.data.ResourceType.LoadPriority;
+import emu.nebula.util.JsonUtils;
+import emu.nebula.util.WeightedList;
+import it.unimi.dsi.fastutil.ints.IntList;
+import it.unimi.dsi.fastutil.ints.IntOpenHashSet;
+import it.unimi.dsi.fastutil.objects.ObjectArrayList;
+import lombok.Getter;
+
+@Getter
+@ResourceType(name = "CharGemAttrGroup.json", loadPriority = LoadPriority.HIGH)
+public class CharGemAttrGroupDef extends BaseDef {
+    private int GroupId;
+    private int GroupType;
+    private int Weight;
+    private String UniqueAttrNumWeight;
+    
+    private transient WeightedList<Integer> uniqueAttrNum;
+    private transient List<CharGemAttrTypeDef> attributeTypes;
+    
+    @Override
+    public int getId() {
+        return GroupId;
+    }
+    
+    public int getRandomUniqueAttrNum() {
+        if (this.uniqueAttrNum == null) {
+            return 0;
+        }
+        
+        return this.uniqueAttrNum.next();
+    }
+    
+    public CharGemAttrTypeDef getRandomAttributeType(IntList list) {
+        // Setup blacklist to prevent the same attribute from showing up twice
+        var blacklist = new IntOpenHashSet();
+        
+        for (int id : list) {
+            var value = GameData.getCharGemAttrValueDataTable().get(id);
+            if (value == null) continue;
+            
+            int blacklistId = value.getTypeId();
+            blacklist.add(blacklistId);
+        }
+        
+        // Create random generator
+        var random = new WeightedList<CharGemAttrTypeDef>();
+        
+        for (var type : this.getAttributeTypes()) {
+            if (blacklist.contains(type.getId())) {
+                continue;
+            }
+            
+            random.add(100, type);
+        }
+        
+        return random.next();
+    }
+    
+    @Override
+    public void onLoad() {
+        this.uniqueAttrNum = new WeightedList<>();
+        this.attributeTypes = new ObjectArrayList<>();
+        
+        if (this.UniqueAttrNumWeight != null) {
+            var json = JsonUtils.decodeMap(this.UniqueAttrNumWeight, Integer.class, Integer.class);
+            
+            for (var entry : json.entrySet()) {
+                this.uniqueAttrNum.add(entry.getValue(), entry.getKey());
+            }
+        }
+    }
+}

src/main/java/emu/nebula/data/resources/CharGemAttrTypeDef.java

@@ -0,0 +1,39 @@
+package emu.nebula.data.resources;
+
+import emu.nebula.data.BaseDef;
+import emu.nebula.data.GameData;
+import emu.nebula.data.ResourceType;
+import emu.nebula.util.WeightedList;
+import lombok.Getter;
+
+@Getter
+@ResourceType(name = "CharGemAttrType.json")
+public class CharGemAttrTypeDef extends BaseDef {
+    private int Id;
+    private int GroupId;
+    
+    private transient WeightedList<CharGemAttrValueDef> values;
+    
+    @Override
+    public int getId() {
+        return Id;
+    }
+    
+    public CharGemAttrValueDef getRandomValueData() {
+        return this.getValues().next();
+    }
+    
+    public int getRandomValue() {
+        return this.getRandomValueData().getId();
+    }
+    
+    @Override
+    public void onLoad() {
+        this.values = new WeightedList<>();
+        
+        var data = GameData.getCharGemAttrGroupDataTable().get(this.GroupId);
+        if (data != null) {
+            data.getAttributeTypes().add(this);
+        }
+    }
+}

src/main/java/emu/nebula/data/resources/CharGemAttrValueDef.java

@@ -0,0 +1,31 @@
+package emu.nebula.data.resources;
+
+import emu.nebula.data.BaseDef;
+import emu.nebula.data.GameData;
+import emu.nebula.data.ResourceType;
+import emu.nebula.data.ResourceType.LoadPriority;
+import lombok.Getter;
+
+@Getter
+@ResourceType(name = "CharGemAttrValue.json", loadPriority = LoadPriority.LOW)
+public class CharGemAttrValueDef extends BaseDef {
+    private int Id;
+    private int TypeId;
+    private int AttrType;
+    private int AttrTypeFirstSubtype;
+    private int AttrTypeSecondSubtype;
+    private int Rarity;
+    
+    @Override
+    public int getId() {
+        return Id;
+    }
+    
+    @Override
+    public void onLoad() {
+        var data = GameData.getCharGemAttrTypeDataTable().get(this.TypeId);
+        if (data != null) {
+            data.getValues().add(this.getRarity(), this);
+        }
+    }
+}

src/main/java/emu/nebula/data/resources/CharGemDef.java

@@ -0,0 +1,24 @@
+package emu.nebula.data.resources;
+
+import emu.nebula.data.BaseDef;
+import emu.nebula.data.GameData;
+import emu.nebula.data.ResourceType;
+import lombok.Getter;
+
+@Getter
+@ResourceType(name = "CharGem.json")
+public class CharGemDef extends BaseDef {
+    private int Id;
+    private int GenerateCostTid;
+    private int RefreshCostTid;
+    private int Type;
+    
+    @Override
+    public int getId() {
+        return Id;
+    }
+    
+    public CharGemSlotControlDef getControlData() {
+        return GameData.getCharGemSlotControlDataTable().get(this.Type);
+    }
+}

src/main/java/emu/nebula/data/resources/CharGemSlotControlDef.java

@@ -0,0 +1,78 @@
+package emu.nebula.data.resources;
+
+import emu.nebula.data.BaseDef;
+import emu.nebula.data.GameData;
+import emu.nebula.data.ResourceType;
+import emu.nebula.util.WeightedList;
+import it.unimi.dsi.fastutil.ints.IntArrayList;
+import it.unimi.dsi.fastutil.ints.IntList;
+import lombok.Getter;
+
+@Getter
+@ResourceType(name = "CharGemSlotControl.json")
+public class CharGemSlotControlDef extends BaseDef {
+    private int Id;
+    private int Position;
+    private int MaxAlterNum;
+    private int UnlockLevel;
+    
+    private int GeneratenCostQty;
+    private int RefreshCostQty;
+    
+    private int UniqueAttrGroupProb;
+    private int UniqueAttrGroupId;
+    private int GuaranteeCount;
+    
+    private int[] AttrGroupId;
+    
+    private int LockableNum;
+    private int LockItemTid;
+    private int LockItemQty;
+    
+    @Override
+    public int getId() {
+        return Id;
+    }
+    
+    public IntList generateAttributes() {
+        // Generate list of attributes
+        var list = new IntArrayList();
+        
+        // Add unique attributes
+        if (this.UniqueAttrGroupId > 0) {
+            var group = GameData.getCharGemAttrGroupDataTable().get(this.UniqueAttrGroupId);
+            int num = group.getRandomUniqueAttrNum();
+            
+            for (int i = 0; i < num; i++) {
+                var attributeType = group.getRandomAttributeType(list);
+                list.add(attributeType.getRandomValue());
+            }
+            
+            if (list.size() >= 4) {
+                return list;
+            }
+        }
+        
+        // Get random attributes
+        var random = new WeightedList<CharGemAttrGroupDef>();
+        
+        for (var groupId : this.AttrGroupId) {
+            var group = GameData.getCharGemAttrGroupDataTable().get(groupId);
+            if (group == null || group.getWeight() == 0) {
+                continue;
+            }
+            
+            random.add(group.getWeight(), group);
+        }
+        
+        // Add up to 4 attributes
+        while (list.size() < 4) {
+            var group = random.next();
+            var attributeType = group.getRandomAttributeType(list);
+            list.add(attributeType.getRandomValue());
+        }
+        
+        // Complete
+        return list;
+    }
+}

src/main/java/emu/nebula/data/resources/CharacterDef.java

@@ -3,6 +3,7 @@ package emu.nebula.data.resources;
 import java.util.List;
 
 import emu.nebula.data.BaseDef;
+import emu.nebula.data.GameData;
 import emu.nebula.data.ResourceType;
 import it.unimi.dsi.fastutil.objects.ObjectArrayList;
 import lombok.Getter;
@@ -24,6 +25,8 @@ public class CharacterDef extends BaseDef {
     private int FragmentsId;
     private int TransformQty;
     
+    private int[] GemSlots;
+    
     private transient List<ChatDef> chats;
     
     @Override
@@ -39,6 +42,11 @@ public class CharacterDef extends BaseDef {
         return this.SkillsUpgradeGroup[index];
     }
     
+    public CharGemDef getCharGemData(int slotId) {
+        int id = this.GemSlots[slotId - 1];
+        return GameData.getCharGemDataTable().get(id);
+    }
+    
     @Override
     public void onLoad() {
         this.chats = new ObjectArrayList<>();

src/main/java/emu/nebula/game/character/Character.java

@@ -1,5 +1,8 @@
 package emu.nebula.game.character;
 
+import java.util.ArrayList;
+import java.util.List;
+
 import org.bson.Document;
 import org.bson.types.Binary;
 import org.bson.types.ObjectId;
@@ -7,6 +10,7 @@ import org.bson.types.ObjectId;
 import dev.morphia.annotations.Entity;
 import dev.morphia.annotations.Id;
 import dev.morphia.annotations.Indexed;
+import dev.morphia.annotations.PostLoad;
 import dev.morphia.annotations.PreLoad;
 import emu.nebula.GameConstants;
 import emu.nebula.Nebula;
@@ -49,9 +53,14 @@ public class Character implements GameDatabaseObject {
     private int skin;
     private int[] skills;
     private Bitset talents;
-    private CharacterContact contact;
     private long createTime;
     
+    private int gemPresetIndex;
+    private List<CharacterGemPreset> gemPresets;
+    private CharacterGemSlot[] gemSlots;
+    
+    private CharacterContact contact;
+    
     @Deprecated // Morphia only!
     public Character() {
         
@@ -66,12 +75,13 @@ public class Character implements GameDatabaseObject {
         this.playerUid = player.getUid();
         this.charId = data.getId();
         this.data = data;
-        this.createTime = Nebula.getCurrentTime();
         
         this.level = 1;
         this.skin = data.getDefaultSkinId();
         this.skills = new int[] {1, 1, 1, 1, 1};
         this.talents = new Bitset();
+        this.createTime = Nebula.getCurrentTime();
+        
         this.contact = new CharacterContact(this);
     }
     
@@ -352,6 +362,152 @@ public class Character implements GameDatabaseObject {
         return true;
     }
     
+    // Gems
+    
+    public boolean hasGemPreset(int index) {
+        return index >= 0 && index < this.getGemPresets().size();
+    }
+    
+    public CharacterGemPreset getCurrentGemPreset() {
+        return this.getGemPreset(this.getGemPresetIndex());
+    }
+    
+    public CharacterGemPreset getGemPreset(int presetIndex) {
+        while (this.getGemPresetIndex() >= this.getGemPresets().size()) {
+            this.getGemPresets().add(new CharacterGemPreset(this));
+        }
+        
+        return this.getGemPresets().get(presetIndex);
+    }
+    
+    public boolean setCurrentGemPreset(int index) {
+        // Sanity check
+        if (index < 0 || index >= GameConstants.CHARACTER_MAX_GEM_PRESETS) {
+            return false;
+        }
+        
+        // Set current preset and save to database
+        this.gemPresetIndex = index;
+        this.save();
+        
+        // Success
+        return true;
+    }
+    
+    public CharacterGem getGem(CharacterGemPreset preset, int slotId) {
+        // Get gem index
+        int gemIndex = preset.getGemIndex(slotId - 1);
+        
+        if (gemIndex <= 0) {
+            return null;
+        }
+        
+        // Get gem slot
+        var slot = this.getGemSlot(slotId);
+        
+        if (slot == null) {
+            return null;
+        }
+        
+        // Get gem from the slot using preset index
+        return slot.getGem(gemIndex);
+    }
+    
+    public boolean equipGem(int presetIndex, int slotId, int gemIndex) {
+        // Sanity check
+        if (presetIndex < 0 || presetIndex >= GameConstants.CHARACTER_MAX_GEM_PRESETS) {
+            return false;
+        }
+        
+        // Get preset
+        var preset = this.getGemPreset(presetIndex);
+        
+        // Set gem index in preset
+        boolean success = preset.setGemIndex(slotId, gemIndex);
+        
+        // Save if successful
+        if (success) {
+            this.save();
+        }
+        
+        return success;
+    }
+    
+    public boolean hasGemSlot(int slotId) {
+        // Calculate index from slot id
+        int index = slotId - 1;
+        
+        // Sanity check
+        if (index < 0 || index >= this.getGemSlots().length) {
+            return false;
+        }
+        
+        return this.gemSlots[index] != null;
+    }
+    
+    public CharacterGemSlot getGemSlot(int slotId) {
+        // Calculate index from slot id
+        int index = slotId - 1;
+        
+        // Sanity check
+        if (index < 0 || index >= this.getGemSlots().length) {
+            return null;
+        }
+        
+        // Create gem slot object if it doesnt exist
+        if (this.gemSlots[index] == null) {
+            this.gemSlots[index] = new CharacterGemSlot(slotId);
+        }
+        
+        return this.gemSlots[index];
+    }
+
+    public synchronized PlayerChangeInfo generateGem(int slotId) {
+        // Get gem slot
+        var slot = this.getGemSlot(slotId);
+        if (slot == null) {
+            return null;
+        }
+        
+        // Skip if slot is full
+        if (slot.isFull()) {
+            return null;
+        }
+        
+        // Get gem data
+        var gemData = this.getData().getCharGemData(slotId);
+        var gemControl = gemData.getControlData();
+        
+        // Check character level
+        if (this.getLevel() < gemControl.getUnlockLevel()) {
+            return null;
+        }
+        
+        // Make sure the player has the materials to craft the emblem
+        if (!getPlayer().getInventory().hasItem(gemData.getGenerateCostTid(), gemControl.getGeneratenCostQty())) {
+            return null;
+        }
+        
+        // Generate attributes and create gem
+        var attributes = gemControl.generateAttributes();
+        var gem = new CharacterGem(attributes);
+        
+        // Add gem to slot
+        slot.getGems().add(gem);
+        
+        // Save to database
+        this.save();
+        
+        // Consume materials
+        var change = getPlayer().getInventory().removeItem(gemData.getGenerateCostTid(), gemControl.getGeneratenCostQty());
+        
+        // Set change info extra info
+        change.setExtraData(gem);
+        
+        // Success
+        return change;
+    }
+    
     // Proto
     
     public Char toProto() {
@@ -363,24 +519,36 @@ public class Character implements GameDatabaseObject {
                 .setTalentNodes(this.getTalents().toByteArray())
                 .addAllSkillLvs(this.getSkills())
                 .setCreateTime(this.getCreateTime());
-        
+
+        // Encode gem presets
         var gemPresets = proto.getMutableCharGemPresets()
-            .getMutableCharGemPresets();
+                .setInUsePresetIndex(this.getGemPresetIndex())
+                .getMutableCharGemPresets();
         
-        for (int i = 0; i < 3; i++) {
-            var preset = CharGemPreset.newInstance()
-                    .addAllSlotGem(-1, -1, -1);
+        for (int i = 0; i < GameConstants.CHARACTER_MAX_GEM_PRESETS; i++) {
+            CharGemPreset info = null;
+                    
+            if (this.hasGemPreset(i)) {
+                info = getGemPresets().get(i).toProto();
+            } else {
+                info = CharGemPreset.newInstance()
+                        .addAllSlotGem(-1, -1, -1);
+            }
             
-            gemPresets.add(preset);
+            gemPresets.add(info);
         }
         
-        for (int i = 1; i <= 3; i++) {
-            var slot = CharGemSlot.newInstance()
-                    .setId(i);
-            
-            proto.addCharGemSlots(slot);
+        // Encode gems
+        for (int i = 1; i <= GameConstants.CHARACTER_MAX_GEM_SLOTS; i++) {
+            if (this.hasGemSlot(i)) {
+                var slot = this.getGemSlot(i);
+                proto.addCharGemSlots(slot.toProto());
+            } else {
+                proto.addCharGemSlots(CharGemSlot.newInstance().setId(i));
+            }
         }
         
+        // Affinity quests
         proto.getMutableAffinityQuests();
         
         return proto;
@@ -394,12 +562,21 @@ public class Character implements GameDatabaseObject {
                 .setTalentNodes(this.getTalents().toByteArray())
                 .addAllSkillLvs(this.getSkills());
         
-        for (int i = 1; i <= 3; i++) {
-            var slot = StarTowerCharGem.newInstance()
-                    .setSlotId(i)
-                    .addAllAttributes(new int[] {0, 0, 0, 0});
+        // Encode gems
+        var preset = this.getCurrentGemPreset();
+        
+        for (int i = 1; i <= preset.getLength(); i++) {
+            var gem = this.getGem(preset, i);
+            var info = StarTowerCharGem.newInstance()
+                    .setSlotId(i);
             
-            proto.addGems(slot);
+            if (gem != null) {
+                info.addAllAttributes(gem.getAttributes());
+            } else {
+                info.addAllAttributes(new int[] {0, 0, 0, 0});
+            }
+            
+            proto.addGems(info);
         }
         
         return proto;
@@ -408,11 +585,24 @@ public class Character implements GameDatabaseObject {
     // Database fix
     
     @PreLoad
-    public void onLoad(Document doc) {
+    public void preLoad(Document doc) {
         var talents = doc.get("talents");
         if (talents != null && talents.getClass() == Binary.class) {
             doc.remove("talents");
             this.talents = new Bitset();
         }
     }
+    
+    @PostLoad
+    public void postLoad() {
+        if (this.gemSlots == null) {
+            // Create gem slots array if it didn't exist
+            this.gemSlots = new CharacterGemSlot[GameConstants.CHARACTER_MAX_GEM_SLOTS];
+        }
+        
+        if (this.gemPresets == null) {
+            // Create gem presets list if it didn't exist
+            this.gemPresets = new ArrayList<>();
+        }
+    }
 }

src/main/java/emu/nebula/game/character/CharacterGem.java

@@ -0,0 +1,39 @@
+package emu.nebula.game.character;
+
+import dev.morphia.annotations.Entity;
+import emu.nebula.proto.Public.CharGem;
+import it.unimi.dsi.fastutil.ints.IntList;
+import lombok.Getter;
+
+@Getter
+@Entity(useDiscriminator = false)
+public class CharacterGem {
+    private boolean locked;
+    private int[] attributes;
+    private int[] alterAttributes;
+    
+    @Deprecated // Morphia only
+    public CharacterGem() {
+        
+    }
+    
+    public CharacterGem(IntList attributes) {
+        this.attributes = attributes.toIntArray();
+        this.alterAttributes = new int[4];
+    }
+    
+    public void setLocked(boolean locked) {
+        this.locked = locked;
+    }
+    
+    // Proto
+    
+    public CharGem toProto() {
+        var proto = CharGem.newInstance()
+            .setLock(this.isLocked())
+            .addAllAttributes(this.getAttributes())
+            .addAllAlterAttributes(this.getAlterAttributes());
+        
+        return proto;
+    }
+}

src/main/java/emu/nebula/game/character/CharacterGemPreset.java

@@ -0,0 +1,58 @@
+package emu.nebula.game.character;
+
+import dev.morphia.annotations.Entity;
+import emu.nebula.proto.Public.CharGemPreset;
+import lombok.Getter;
+
+@Getter
+@Entity(useDiscriminator = false)
+public class CharacterGemPreset {
+    private String name;
+    private int[] gems;
+    
+    @Deprecated // Morphia only
+    public CharacterGemPreset() {
+        
+    }
+    
+    public CharacterGemPreset(Character character) {
+        this.gems = new int[] {-1, -1, -1};
+    }
+    
+    public int getLength() {
+        return this.getGems().length;
+    }
+    
+    public int getGemIndex(int slotIndex) {
+        if (slotIndex < 0 || slotIndex >= this.getLength()) {
+            return -1;
+        }
+        
+        return this.getGems()[slotIndex];
+    }
+
+    public boolean setGemIndex(int slotId, int gemIndex) {
+        int slotIndex = slotId - 1;
+        
+        if (slotIndex < 0 || slotIndex >= this.getLength()) {
+            return false;
+        }
+        
+        this.getGems()[slotIndex] = gemIndex;
+        
+        return true;
+    }
+    
+    // Proto
+    
+    public CharGemPreset toProto() {
+        var proto = CharGemPreset.newInstance()
+                .addAllSlotGem(this.getGems());
+        
+        if (this.getName() != null) {
+            proto.setName(this.getName());
+        }
+        
+        return proto;
+    }
+}

src/main/java/emu/nebula/game/character/CharacterGemSlot.java

@@ -0,0 +1,51 @@
+package emu.nebula.game.character;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import dev.morphia.annotations.Entity;
+import emu.nebula.GameConstants;
+import emu.nebula.proto.Public.CharGemSlot;
+import lombok.Getter;
+
+@Getter
+@Entity(useDiscriminator = false)
+public class CharacterGemSlot {
+    private int id;
+    private List<CharacterGem> gems;
+    
+    @Deprecated // Morphia only
+    public CharacterGemSlot() {
+        
+    }
+    
+    public CharacterGemSlot(int id) {
+        this.id = id;
+        this.gems = new ArrayList<>();
+    }
+
+    public CharacterGem getGem(int gemId) {
+        if (gemId < 0 || gemId >= this.getGems().size()) {
+            return null;
+        }
+        
+        return this.getGems().get(gemId);
+    }
+    
+    public boolean isFull() {
+        return getGems().size() >= GameConstants.CHARACTER_MAX_GEMS_PER_SLOT;
+    }
+    
+    // Proto
+    
+    public CharGemSlot toProto() {
+        var proto = CharGemSlot.newInstance()
+            .setId(this.getId());
+        
+        for (var gem : this.getGems()) {
+            proto.addAlterGems(gem.toProto());
+        }
+        
+        return proto;
+    }
+}

src/main/java/emu/nebula/server/handlers/HandlerCharGemEquipGemReq.java

@@ -0,0 +1,35 @@
+package emu.nebula.server.handlers;
+
+import emu.nebula.net.NetHandler;
+import emu.nebula.net.NetMsgId;
+import emu.nebula.proto.CharGemEquipGem.CharGemEquipGemReq;
+import emu.nebula.net.HandlerId;
+import emu.nebula.net.GameSession;
+
+@HandlerId(NetMsgId.char_gem_equip_gem_req)
+public class HandlerCharGemEquipGemReq extends NetHandler {
+
+    @Override
+    public byte[] handle(GameSession session, byte[] message) throws Exception {
+        // Parse request
+        var req = CharGemEquipGemReq.parseFrom(message);
+        
+        // Get character
+        var character = session.getPlayer().getCharacters().getCharacterById(req.getCharId());
+        
+        if (character == null) {
+            return session.encodeMsg(NetMsgId.char_gem_equip_gem_failed_ack);
+        }
+        
+        // Equip gem
+        boolean success = character.equipGem(req.getPresetId(), req.getSlotId(), req.getGemIndex());
+        
+        if (success == false) {
+            return session.encodeMsg(NetMsgId.char_gem_equip_gem_failed_ack);
+        }
+        
+        // Encode and send
+        return session.encodeMsg(NetMsgId.char_gem_equip_gem_succeed_ack);
+    }
+
+}

src/main/java/emu/nebula/server/handlers/HandlerCharGemGenerateReq.java

@@ -0,0 +1,43 @@
+package emu.nebula.server.handlers;
+
+import emu.nebula.net.NetHandler;
+import emu.nebula.net.NetMsgId;
+import emu.nebula.proto.CharGemGenerate.CharGemGenerateReq;
+import emu.nebula.proto.CharGemGenerate.CharGemGenerateResp;
+import emu.nebula.net.HandlerId;
+import emu.nebula.game.character.CharacterGem;
+import emu.nebula.net.GameSession;
+
+@HandlerId(NetMsgId.char_gem_generate_req)
+public class HandlerCharGemGenerateReq extends NetHandler {
+
+    @Override
+    public byte[] handle(GameSession session, byte[] message) throws Exception {
+        // Parse request
+        var req = CharGemGenerateReq.parseFrom(message);
+        
+        // Get character
+        var character = session.getPlayer().getCharacters().getCharacterById(req.getCharId());
+        if (character == null) {
+            return session.encodeMsg(NetMsgId.char_gem_generate_failed_ack);
+        }
+        
+        // Generate gem
+        var change = character.generateGem(req.getSlotId());
+        
+        if (change == null) {
+            return session.encodeMsg(NetMsgId.char_gem_generate_failed_ack);
+        }
+        
+        var gem = (CharacterGem) change.getExtraData();
+        
+        // Build response
+        var rsp = CharGemGenerateResp.newInstance()
+                .setChangeInfo(change.toProto())
+                .setCharGem(gem.toProto());
+        
+        // Encode and send
+        return session.encodeMsg(NetMsgId.char_gem_generate_succeed_ack, rsp);
+    }
+
+}

src/main/java/emu/nebula/server/handlers/HandlerCharGemUsePresetReq.java

@@ -0,0 +1,35 @@
+package emu.nebula.server.handlers;
+
+import emu.nebula.net.NetHandler;
+import emu.nebula.net.NetMsgId;
+import emu.nebula.proto.CharGemUsePreset.CharGemUsePresetReq;
+import emu.nebula.net.HandlerId;
+import emu.nebula.net.GameSession;
+
+@HandlerId(NetMsgId.char_gem_use_preset_req)
+public class HandlerCharGemUsePresetReq extends NetHandler {
+
+    @Override
+    public byte[] handle(GameSession session, byte[] message) throws Exception {
+        // Parse request
+        var req = CharGemUsePresetReq.parseFrom(message);
+        
+        // Get character
+        var character = session.getPlayer().getCharacters().getCharacterById(req.getCharId());
+        
+        if (character == null) {
+            return session.encodeMsg(NetMsgId.char_gem_use_preset_failed_ack);
+        }
+        
+        // Use preset
+        boolean success = character.setCurrentGemPreset(req.getPresetId());
+        
+        if (success == false) {
+            return session.encodeMsg(NetMsgId.char_gem_use_preset_failed_ack);
+        }
+        
+        // Encode and send
+        return session.encodeMsg(NetMsgId.char_gem_use_preset_succeed_ack);
+    }
+
+}