using SqlSugar;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Reflection;
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using System.Text;
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using System.Threading.Tasks;
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namespace WIDESEA_Core.Helper
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{
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public static class ObjectExtension
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{
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/// <summary>
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/// 将字典列表转换为指定类型的对象列表
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/// </summary>
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/// <typeparam name="T">目标对象类型</typeparam>
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/// <param name="dicList">源字典列表</param>
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/// <returns>转换后的对象列表</returns>
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public static List<T> DicToIEnumerable<T>(this List<Dictionary<string, object>> dicList)
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{
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List<T> list = new List<T>();
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foreach (Dictionary<string, object> dic in dicList)
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{
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list.Add(dic.DicToModel<T>());
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}
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return list;
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}
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/// <summary>
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/// 将字典转换为指定类型的模型对象
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/// </summary>
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/// <typeparam name="T">目标模型类型</typeparam>
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/// <param name="dic">包含属性值的字典</param>
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/// <returns>转换后的模型对象</returns>
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/// <remarks>
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/// 1. 支持通过属性名、首字母大写或小写的属性名从字典中查找值
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/// 2. 处理了SugarColumn特性的特殊逻辑：主键/自增字段跳过，非空字段校验
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/// 3. 自动进行类型转换
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/// </remarks>
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/// <exception cref="Exception">当非空字段值为null或空时抛出异常</exception>
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public static T DicToModel<T>(this Dictionary<string, object> dic)
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{
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T model = Activator.CreateInstance<T>();
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PropertyInfo[] propertyInfos = typeof(T).GetProperties(BindingFlags.GetProperty | BindingFlags.Public | BindingFlags.Instance);
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foreach (var property in propertyInfos)
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{
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object? value = null;
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if (!dic.TryGetValue(property.Name, out value))
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{
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if (!dic.TryGetValue(property.Name.FirstLetterToUpper(), out value))
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{
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if (!dic.TryGetValue(property.Name.FirstLetterToLower(), out value))
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{
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continue;
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}
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}
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}
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SugarColumn? sugarColumn = property.GetCustomAttribute<SugarColumn>();
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if (sugarColumn != null)
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{
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if ((value == null || value.Equals("")))
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{
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if (sugarColumn.IsIdentity || sugarColumn.IsPrimaryKey)
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continue;
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else if (sugarColumn.IsNullable)
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{
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property.SetValue(model, value);
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}
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else
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{
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throw new Exception($"The value of {property.Name} is null or empty, but it is not allowed to be null or empty.");
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}
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}
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else
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{
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property.SetValue(model, value.ChangeType(property.PropertyType));
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}
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if (sugarColumn.IsIdentity || sugarColumn.IsPrimaryKey)
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continue;
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}
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if (value != null && sugarColumn != null && !sugarColumn.IsNullable)
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property.SetValue(model, value.ChangeType(property.PropertyType));
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}
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return model;
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}
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}
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}
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