Add Inventory system with Inventory, InventorySlot, and StatModifierItem classes; update character attributes to include level and experience

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Assets/Scripts/Inventory.meta

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Assets/Scripts/Inventory/Inventory.cs

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+using System.Collections.Generic;
+using Sirenix.Serialization;
+using UnityEngine;
+
+namespace Inventory
+{
+    public class Inventory : MonoBehaviour
+    {
+        [OdinSerialize, SerializeField] private List<InventorySlot> weaponSlots = new();
+        [OdinSerialize, SerializeField] private List<InventorySlot> itemSlots = new();
+        
+        public IReadOnlyList<InventorySlot> WeaponSlots => weaponSlots.AsReadOnly();
+        public IReadOnlyList<InventorySlot> ItemSlots => itemSlots.AsReadOnly();
+        
+        public void AddWeapon(WeaponItem weaponItem)
+        {
+            foreach (var slot in weaponSlots)
+            {
+                if (slot.item == weaponItem) return;
+            }
+            
+            weaponSlots.Add(new InventorySlot { item = weaponItem, quantity = 1 });
+        }
+        
+        public void AddItem(ScriptableObject item)
+        {
+            foreach (var slot in itemSlots)
+            {
+                if (slot.item != item) continue;
+                
+                slot.quantity++;
+                return;
+            }
+            
+            itemSlots.Add(new InventorySlot { item = item, quantity = 1 });
+        }
+        
+        public void RemoveWeapon(WeaponItem weaponItem)
+        {
+            for (var i = 0; i < weaponSlots.Count; i++)
+            {
+                if (weaponSlots[i].item != weaponItem) continue;
+                
+                if (--weaponSlots[i].quantity <= 0)
+                {
+                    weaponSlots.RemoveAt(i);
+                }
+                return;
+            }
+        }
+        
+        public void RemoveItem(ScriptableObject item)
+        {
+            for (var i = 0; i < itemSlots.Count; i++)
+            {
+                if (itemSlots[i].item != item) continue;
+                
+                if (--itemSlots[i].quantity <= 0)
+                {
+                    itemSlots.RemoveAt(i);
+                }
+                return;
+            }
+        }
+    }
+}

Assets/Scripts/Inventory/Inventory.cs.meta

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Assets/Scripts/Inventory/InventorySlot.cs

@@ -0,0 +1,13 @@
+using System;
+using Sirenix.Serialization;
+using UnityEngine;
+
+namespace Inventory
+{
+    [Serializable]
+    public class InventorySlot
+    {
+        [OdinSerialize] public ScriptableObject item;
+        [OdinSerialize] public int quantity;
+    }
+}

Assets/Scripts/Inventory/InventorySlot.cs.meta

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Assets/Scripts/Inventory/StatModifierItem.cs

@@ -0,0 +1,19 @@
+using System.Collections.Generic;
+using Interfaces;
+using Sirenix.OdinInspector;
+using Sirenix.Serialization;
+using UnityEngine;
+
+namespace Inventory
+{
+    [CreateAssetMenu(menuName = "Game/Item/StatModifierItem")]
+    public class StatModifierItem : SerializedScriptableObject
+    {
+        public string itemName;
+        [TextArea] public string description;
+        public Sprite icon;
+        
+        public List<IStatModifier> cures = new();
+        public List<IStatModifier> curses = new();
+    }
+}

Assets/Scripts/Inventory/StatModifierItem.cs.meta

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+timeCreated: 1752268788

Assets/Scripts/Inventory/WeaponItem.cs

@@ -0,0 +1,14 @@
+using Sirenix.Serialization;
+using UnityEngine;
+
+namespace Inventory
+{
+    [CreateAssetMenu(menuName = "Game/Item/WeaponItem")]
+    public class WeaponItem : ScriptableObject
+    {
+        [OdinSerialize] public string weaponName;
+        [OdinSerialize, TextArea] public string description;
+        [OdinSerialize] public GameObject prefab;
+        [OdinSerialize] public Sprite icon;
+    }
+}

Assets/Scripts/Inventory/WeaponItem.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: efa44a330e8343c08e3af638d466c118
+timeCreated: 1752268856

Assets/Scripts/Modifiers/PercentStatModifier.cs

@@ -1,25 +1,27 @@
+using System;
 using Data;
 using Interfaces;
 
 namespace Modifiers
 {
+    [Serializable]
     public class PercentStatModifier : IStatModifier
     {
         private float lastAppliedAmount;
 
-        public Stat Stat { get; set; }
+        public Stat stat;
-        public float Percent { get; set; }
+        public float percent;
-        public string Description => $"{Stat} +{Percent * 100}%";
+        public string Description => $"{stat} +{percent * 100}%";
 
         public void Apply(CharacterAttributes attributes)
         {
             var baseValue = GetBaseValue<float>(attributes);
-            lastAppliedAmount = baseValue * Percent;
+            lastAppliedAmount = baseValue * percent;
             
             var flatModifier = new FlatStatModifier
             {
                 value = lastAppliedAmount,
-                stat = Stat
+                stat = stat
             };
             
             flatModifier.Apply(attributes);
@@ -30,7 +32,7 @@ namespace Modifiers
             var flatModifier = new FlatStatModifier
             {
                 value = -lastAppliedAmount,
-                stat = Stat
+                stat = stat
             };
             
             flatModifier.Apply(attributes);
@@ -38,7 +40,7 @@ namespace Modifiers
 
         private T GetBaseValue<T>(CharacterAttributes attributes)
         {
-            return Stat switch
+            return stat switch
             {
                 Stat.Health => (T)(object)attributes.Health,
                 Stat.MaxHealth => (T)(object)attributes.MaxHealth,

Assets/Scripts/Systems/CharacterModifierManager.cs

@@ -1,6 +1,7 @@
 using System.Collections.Generic;
 using Data;
 using Interfaces;
+using KBCore.Refs;
 using Sirenix.Serialization;
 using UnityEngine;
 
@@ -10,7 +11,7 @@ namespace Systems
     {
         [OdinSerialize] private List<IStatModifier> activeModifiers = new();
         
-        [SerializeField] private Character character;
+        [SerializeField, Self] private Character character;
         
         public void EquipItem(IStatModifier modifier)
         {

Assets/Scripts/Systems/CharacterWeaponsManager.cs

@@ -1,4 +1,6 @@
 using System.Collections.Generic;
+using Data;
+using KBCore.Refs;
 using Sirenix.Serialization;
 using UnityEngine;
 using Weapons;
@@ -8,5 +10,57 @@ namespace Systems
     public class CharacterWeaponsManager : MonoBehaviour
     {
         [OdinSerialize] private List<Weapon> equippedWeapons = new();
+        
+        [SerializeField] private IReadOnlyList<Weapon> EquippedWeapons => equippedWeapons.AsReadOnly();
+        [SerializeField, Self] private Character character;
+
+        public Weapon EquipWeapon(GameObject weaponPrefab)
+        {
+            var weaponObject = Instantiate(weaponPrefab, transform);
+            if (weaponObject.TryGetComponent(out Weapon weapon))
+            {
+                weapon.character = character;
+                equippedWeapons.Add(weapon);
+                weapon.enabled = true;
+                return weapon;
+            }
+
+            Destroy(weaponObject);
+            return null;
+        }
+        
+        public void UnequipWeapon(Weapon weapon, bool destroy = true)
+        {
+            if (!equippedWeapons.Remove(weapon)) return;
+            weapon.enabled = false;
+
+            if (!destroy) return;
+            Destroy(weapon.gameObject);
+        }
+        
+        public void DisableAllWeapons()
+        {
+            foreach (var weapon in equippedWeapons)
+            {
+                weapon.enabled = false;
+            }
+        }
+        
+        public void EnableAllWeapons()
+        {
+            foreach (var weapon in equippedWeapons)
+            {
+                weapon.enabled = true;
+            }
+        }
+        
+        public void ClearWeapons()
+        {
+            foreach (var weapon in equippedWeapons)
+            {
+                Destroy(weapon.gameObject);
+            }
+            equippedWeapons.Clear();
+        }
     }
 }

Assets/Scripts/Systems/InventoryManager.cs

@@ -0,0 +1,86 @@
+using System;
+using System.Linq;
+using Inventory;
+using KBCore.Refs;
+using UnityEngine;
+using Weapons;
+
+namespace Systems
+{
+    public class InventoryManager : MonoBehaviour
+    {
+        [SerializeField, Self] private Inventory.Inventory inventory;
+        [SerializeField, Self] private CharacterModifierManager characterModifierManager;
+        [SerializeField, Self] private CharacterWeaponsManager characterWeaponsManager;
+
+        private void Start()
+        {
+            if (inventory == null)
+            {
+                Debug.LogError("Inventory is not assigned in InventoryManager.");
+                return;
+            }
+
+            if (characterModifierManager == null)
+            {
+                Debug.LogError("CharacterModifierManager is not assigned in InventoryManager.");
+                return;
+            }
+
+            if (characterWeaponsManager == null)
+            {
+                Debug.LogError("CharacterWeaponsManager is not assigned in InventoryManager.");
+                return;
+            }
+
+            EquipAllItems();
+            EquipAllWeapons();
+        }
+
+        public void EquipItem(StatModifierItem item)
+        {
+            inventory.AddItem(item);
+            foreach (var cure in item.cures) characterModifierManager.EquipItem(cure);
+            foreach (var curse in item.curses) characterModifierManager.EquipItem(curse);
+        }
+
+        public void UnequipItem(StatModifierItem item)
+        {
+            if (inventory.ItemSlots.All(slot => slot.item != item)) return;
+            inventory.RemoveItem(item);
+            
+            foreach (var cure in item.cures) characterModifierManager.UnequipItem(cure);
+            foreach (var curse in item.curses) characterModifierManager.UnequipItem(curse);
+        }
+
+        public void EquipWeapon(WeaponItem weaponItem)
+        {
+            inventory.AddWeapon(weaponItem);
+            characterWeaponsManager.EquipWeapon(weaponItem.prefab);
+        }
+        
+        public void UnequipWeapon(WeaponItem weaponItem)
+        {
+            if (inventory.WeaponSlots.All(slot => slot.item != weaponItem)) return;
+            inventory.RemoveWeapon(weaponItem);
+            weaponItem.prefab.TryGetComponent(out Weapon weapon);
+            characterWeaponsManager.UnequipWeapon(weapon);
+        }
+        
+        private void EquipAllWeapons()
+        {
+            foreach (var slot in inventory.WeaponSlots)
+            {
+               EquipWeapon(slot.item as WeaponItem);
+            }
+        }
+        
+        private void EquipAllItems()
+        {
+            foreach (var slot in inventory.ItemSlots)
+            {
+                EquipItem(slot.item as StatModifierItem);
+            }
+        }
+    }
+}

Assets/Scripts/Systems/InventoryManager.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 57782f9b469d49ab9f4ad6c6e1ddf844
+timeCreated: 1752269055

Assets/Scripts/Weapons/Weapon.cs

@@ -11,8 +11,8 @@ namespace Weapons
     {
         private float timer;
         
-        [SerializeField] protected Character character;
         [OdinSerialize, InlineProperty] public WeaponStats weaponStats = new();
+        public Character character;
 
         private void Update()
         {