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using System;
using System.Collections.Generic;
using System.Reflection;
using System.Text;
using System.Text.RegularExpressions;
using UnityEngine;
using UnityEditor;
namespace NaughtyAttributes.Editor
{
public class CodeGenerator : UnityEditor.Editor
{
private static readonly string GENERATED_CODE_TARGET_FOLDER =
(Application.dataPath.Replace("Assets", string.Empty) + AssetDatabase.GUIDToAssetPath(AssetDatabase.FindAssets("CodeGenerator")[0]))
.Replace("CodeGenerator.cs", string.Empty)
.Replace("/", "\\");
private static readonly string CLASS_NAME_PLACEHOLDER = "__classname__";
private static readonly string ENTRIES_PLACEHOLDER = "__entries__";
private static readonly string META_ENTRY_FORMAT = "metasByAttributeType[typeof({0})] = new {1}();" + Environment.NewLine;
private static readonly string DRAWER_ENTRY_FORMAT = "drawersByAttributeType[typeof({0})] = new {1}();" + Environment.NewLine;
private static readonly string GROUPER_ENTRY_FORMAT = "groupersByAttributeType[typeof({0})] = new {1}();" + Environment.NewLine;
private static readonly string VALIDATOR_ENTRY_FORMAT = "validatorsByAttributeType[typeof({0})] = new {1}();" + Environment.NewLine;
private static readonly string DRAW_CONDITION_ENTRY_FORMAT = "drawConditionsByAttributeType[typeof({0})] = new {1}();" + Environment.NewLine;
//[UnityEditor.Callbacks.DidReloadScripts]
[MenuItem("Tools/NaughtyAttributes/Update Attributes Database")]
private static void GenerateCode()
{
GenerateScript<PropertyMeta, PropertyMetaAttribute>("PropertyMetaDatabase", "PropertyMetaDatabaseTemplate", META_ENTRY_FORMAT);
GenerateScript<PropertyDrawer, PropertyDrawerAttribute>("PropertyDrawerDatabase", "PropertyDrawerDatabaseTemplate", DRAWER_ENTRY_FORMAT);
GenerateScript<PropertyGrouper, PropertyGrouperAttribute>("PropertyGrouperDatabase", "PropertyGrouperDatabaseTemplate", GROUPER_ENTRY_FORMAT);
GenerateScript<PropertyValidator, PropertyValidatorAttribute>("PropertyValidatorDatabase", "PropertyValidatorDatabaseTemplate", VALIDATOR_ENTRY_FORMAT);
GenerateScript<PropertyDrawCondition, PropertyDrawConditionAttribute>("PropertyDrawConditionDatabase", "PropertyDrawConditionDatabaseTemplate", DRAW_CONDITION_ENTRY_FORMAT);
GenerateScript<FieldDrawer, FieldDrawerAttribute>("FieldDrawerDatabase", "FieldDrawerDatabaseTemplate", DRAWER_ENTRY_FORMAT);
GenerateScript<MethodDrawer, MethodDrawerAttribute>("MethodDrawerDatabase", "MethodDrawerDatabaseTemplate", DRAWER_ENTRY_FORMAT);
GenerateScript<NativePropertyDrawer, NativePropertyDrawerAttribute>("NativePropertyDrawerDatabase", "NativePropertyDrawerDbTemplate", DRAWER_ENTRY_FORMAT);
AssetDatabase.Refresh();
}
private static void GenerateScript<TClass, TAttribute>(string scriptName, string templateName, string entryFormat)
where TAttribute : IAttribute
{
string[] templateAssets = AssetDatabase.FindAssets(templateName);
if (templateAssets.Length == 0)
{
return;
}
string templateGUID = templateAssets[0];
string templateRelativePath = AssetDatabase.GUIDToAssetPath(templateGUID);
string templateFormat = (AssetDatabase.LoadAssetAtPath(templateRelativePath, typeof(TextAsset)) as TextAsset).ToString();
//string templateFullPath = (Application.dataPath.Replace("Assets", string.Empty) + templateRelativePath).Replace("/", "\\");
//string templateFormat = IOUtility.ReadFromFile(templateFullPath);
StringBuilder entriesBuilder = new StringBuilder();
List<Type> subTypes = GetAllSubTypes(typeof(TClass));
foreach (var subType in subTypes)
{
IAttribute[] attributes = (IAttribute[])subType.GetCustomAttributes(typeof(TAttribute), true);
if (attributes.Length > 0)
{
entriesBuilder.AppendFormat(entryFormat, attributes[0].TargetAttributeType.Name, subType.Name);
}
}
string scriptContent = templateFormat
.Replace(CLASS_NAME_PLACEHOLDER, scriptName)
.Replace(ENTRIES_PLACEHOLDER, entriesBuilder.ToString());
scriptContent = Regex.Replace(scriptContent, @"\r\n|\n\r|\r|\n", Environment.NewLine); // Normalize line endings
string scriptPath = GENERATED_CODE_TARGET_FOLDER + scriptName + ".cs";
IOUtility.WriteToFile(scriptPath, scriptContent);
}
private static List<Type> GetAllSubTypes(Type baseClass)
{
var result = new List<Type>();
Assembly[] assemblies = AppDomain.CurrentDomain.GetAssemblies();
foreach (var assemly in assemblies)
{
Type[] types = assemly.GetTypes();
foreach (var type in types)
{
if (type.IsSubclassOf(baseClass))
{
result.Add(type);
}
}
}
return result;
}
}
}