100 lines
2.9 KiB
C#
100 lines
2.9 KiB
C#
using System;
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using System.IO;
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using System.Linq;
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using System.Reflection;
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using UnityEditorInternal;
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using UnityEngine;
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// ReSharper disable AssignNullToNotNullAttribute
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namespace NBC
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{
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public class ScriptableObjectSingleton<T> : ScriptableObject where T : ScriptableObject
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{
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private static T _instance;
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public static T Instance
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{
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get
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{
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if (_instance == null)
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{
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_instance = Load();
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}
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return _instance;
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}
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}
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private static T Load()
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{
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var scriptableObjectPath = GetScriptableObjectPath();
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if (string.IsNullOrEmpty(scriptableObjectPath))
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{
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return null;
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}
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var loadSerializedFileAndForget = InternalEditorUtility.LoadSerializedFileAndForget(scriptableObjectPath);
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if (loadSerializedFileAndForget.Length <= 0)
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{
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return CreateInstance<T>();
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}
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return loadSerializedFileAndForget[0] as T;
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}
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public static void Save(bool saveAsText = true)
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{
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if (_instance == null)
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{
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Debug.LogError("Cannot save ScriptableObjectSingleton: no instance!");
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return;
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}
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var scriptableObjectPath = GetScriptableObjectPath();
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if (string.IsNullOrEmpty(scriptableObjectPath))
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{
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return;
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}
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var directoryName = Path.GetDirectoryName(scriptableObjectPath);
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if (!Directory.Exists(directoryName))
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{
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Directory.CreateDirectory(directoryName);
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}
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UnityEngine.Object[] obj = { _instance };
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InternalEditorUtility.SaveToSerializedFileAndForget(obj, scriptableObjectPath, saveAsText);
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}
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private static string GetScriptableObjectPath()
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{
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var scriptableObjectPathAttribute = typeof(T).GetCustomAttribute(typeof(ScriptableObjectPathAttribute)) as ScriptableObjectPathAttribute;
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return scriptableObjectPathAttribute?.ScriptableObjectPath;
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}
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}
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[AttributeUsage(AttributeTargets.Class, Inherited = false)]
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public class ScriptableObjectPathAttribute : Attribute
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{
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internal readonly string ScriptableObjectPath;
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public ScriptableObjectPathAttribute(string scriptableObjectPath)
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{
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if (string.IsNullOrEmpty(scriptableObjectPath))
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{
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throw new ArgumentException("Invalid relative path (it is empty)");
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}
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if (scriptableObjectPath[0] == '/')
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{
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scriptableObjectPath = scriptableObjectPath.Substring(1);
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}
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ScriptableObjectPath = scriptableObjectPath;
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}
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}
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} |