using Yw;
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using Yw.Entity;
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namespace IStation.DAL
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{
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/// <summary>
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/// 数据库访问基类
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/// </summary>
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/// <typeparam name="T">实体类类型</typeparam>
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public partial class BaseDAL<T> where T : BaseEntity, new()
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{
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/// <summary>
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/// 连接配置
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/// </summary>
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public virtual string FileName
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{
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get
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{
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return default;
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}
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}
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#region Protected
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/// <summary>
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/// 保存文件
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/// </summary>
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protected void SaveObjectFile<obj>(string fileName, obj t)
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{
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var str = JsonHelper.Object2FormatJson(t);
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File.WriteAllText(fileName, str);
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}
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/// <summary>
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/// 查询文件
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/// </summary>
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protected obj GetFileObject<obj>(string fileName)
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{
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if (!File.Exists(fileName))
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return default;
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var str = File.ReadAllText(fileName);
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if (string.IsNullOrEmpty(str))
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return default;
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return JsonHelper.Json2Object<obj>(str);
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}
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#endregion
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#region Get
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/// <summary>
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/// 获取全部
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/// </summary>
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public virtual List<T> GetAll()
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{
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var list = GetFileObject<List<T>>(FileName);
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return list;
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}
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/// <summary>
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/// 获取指定ID对象
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/// </summary>
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public virtual T GetByID(long id)
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{
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if (id < 1)
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return default;
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var list = GetFileObject<List<T>>(FileName);
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if (list == null || list.Count < 1)
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return default;
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return list.Find(t => t.ID == id);
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}
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/// <summary>
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/// 获取指定ID对象列表
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/// </summary>
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/// <returns></returns>
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public virtual List<T> GetByIds(List<long> ids)
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{
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if (ids == null || ids.Count < 1)
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return default;
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var list = GetFileObject<List<T>>(FileName);
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if (list == null || list.Count < 1)
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return default;
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return list.Where(t => ids.Contains(t.ID)).ToList();
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}
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#endregion
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#region Insert
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/// <summary>
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/// 插入
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/// </summary>
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public virtual long Insert(T entity)
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{
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if (entity == null)
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return default;
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if (entity.ID <= 0)
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{
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entity.ID = Yw.YitIdHelper.NextId();
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}
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var list = GetFileObject<List<T>>(FileName);
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if (list == null)
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list = new List<T>();
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list.Add(entity);
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SaveObjectFile(FileName, list);
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return entity.ID;
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}
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/// <summary>
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/// 批量插入
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/// </summary>
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public virtual bool Inserts(List<T> entities)
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{
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if (entities == null || entities.Count < 1)
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return default;
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var list = GetFileObject<List<T>>(FileName);
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if (list == null)
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list = new List<T>();
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entities.ForEach(x =>
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{
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if (x.ID <= 0)
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{
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x.ID = Yw.YitIdHelper.NextId();
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}
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});
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list.AddRange(entities);
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SaveObjectFile(FileName, list);
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return true;
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}
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/// <summary>
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/// 插入并返回
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/// </summary>
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public virtual List<long> InsertsR(List<T> entities)
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{
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if (entities == null || entities.Count < 1)
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return default;
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var list = GetFileObject<List<T>>(FileName);
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if (list == null)
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list = new List<T>();
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entities.ForEach(x =>
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{
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if (x.ID <= 0)
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{
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x.ID = Yw.YitIdHelper.NextId();
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}
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});
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list.AddRange(entities);
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SaveObjectFile(FileName, list);
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return entities.Select(x => x.ID).ToList();
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}
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#endregion
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#region Update
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/// <summary>
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/// 更新
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/// </summary>
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public virtual bool Update(T entity)
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{
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if (entity == null)
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return default;
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var list = GetFileObject<List<T>>(FileName);
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if (list == null || list.Count < 1)
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return default;
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var src = list.Find(x => x.ID == entity.ID);
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if (src == null)
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return default;
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entity.Map(src);
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SaveObjectFile(FileName, list);
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return true;
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}
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/// <summary>
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/// 批量更新
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/// </summary>
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public virtual bool Updates(List<T> entities)
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{
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if (entities == null || entities.Count < 1)
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return default;
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var list = GetFileObject<List<T>>(FileName);
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if (list == null || list.Count < 1)
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return default;
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foreach (var entity in entities)
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{
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var src = list.Find(x => x.ID == entity.ID);
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if (src == null)
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return default;
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entity.Map(src);
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}
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SaveObjectFile(FileName, list);
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return true;
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}
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#endregion
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#region Exist
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/// <summary>
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/// 是否存在对象
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/// </summary>
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public virtual bool Exist(long id)
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{
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if (id < 1)
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return default;
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var list = GetFileObject<List<T>>(FileName);
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if (list == null || list.Count < 1)
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return default;
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return list.Exists(x => x.ID == id);
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}
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#endregion
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#region Delete
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/// <summary>
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/// 删除
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/// </summary>
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public virtual bool Delete(T entity)
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{
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if (entity == null)
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return default;
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if (entity.ID < 1)
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return default;
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var list = GetFileObject<List<T>>(FileName);
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if (list == null || list.Count < 1)
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return false;
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var src = list.Find(t => t.ID == entity.ID);
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if (src == null)
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return false;
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list.Remove(src);
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if (list.Count < 1)
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File.Delete(FileName);
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else
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SaveObjectFile(FileName, list);
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return true;
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}
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/// <summary>
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/// 批量删除
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/// </summary>
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public virtual bool Deletes(List<T> entities)
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{
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if (entities == null || entities.Count < 1)
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return default;
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if (entities.Exists(x => x.ID < 1))
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return default;
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var list = GetFileObject<List<T>>(FileName);
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if (list == null || list.Count < 1)
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return false;
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var ids = entities.Select(x => x.ID);
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list.RemoveAll(x => ids.Contains(x.ID));
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if (list.Count < 1)
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File.Delete(FileName);
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else
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SaveObjectFile(FileName, list);
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return true;
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}
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/// <summary>
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/// 通过ID删除
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/// </summary>
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public virtual bool DeleteByID(long id)
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{
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if (id < 1)
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return default;
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var list = GetFileObject<List<T>>(FileName);
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if (list == null || list.Count < 1)
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return false;
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var src = list.Find(t => t.ID == id);
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if (src == null)
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return false;
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list.Remove(src);
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if (list.Count < 1)
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File.Delete(FileName);
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else
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SaveObjectFile(FileName, list);
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return true;
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}
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/// <summary>
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/// 通过ID列表删除
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/// </summary>
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public virtual bool DeleteByIds(List<long> ids)
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{
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if (ids == null || ids.Count < 1)
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return default;
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var list = GetFileObject<List<T>>(FileName);
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list.RemoveAll(x => ids.Contains(x.ID));
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if (list.Count < 1)
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File.Delete(FileName);
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else
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SaveObjectFile(FileName, list);
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return true;
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}
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/// <summary>
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/// 删除所有对象
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/// </summary>
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public virtual bool DeleteAll()
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{
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File.Delete(FileName);
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return true;
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}
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#endregion
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#region Cover
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/// <summary>
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/// 覆盖
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/// </summary>
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public virtual bool Covers(List<T> entities)
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{
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if (entities == null || entities.Count() < 1)
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return default;
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foreach (var entity in entities)
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{
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if (entity.ID < 1)
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entity.ID = Yw.YitIdHelper.NextId();
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}
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SaveObjectFile(FileName, entities);
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return true;
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}
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#endregion
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}
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}
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