/// <summary>
/// 获取权限列表
/// </summary>
/// <returns></returns>
public virtual IEnumerable <string> GetPrivileges()
{
// 注册查看权限
foreach (var privilege in ViewPrivileges)
{
yield return(privilege);
}
// 允许添加或编辑数据时注册编辑权限
if (!string.IsNullOrEmpty(AddUrl) || !string.IsNullOrEmpty(EditUrl))
{
foreach (var privilege in EditPrivileges)
{
yield return(privilege);
}
}
// 允许批量操作数据时注册删除权限
if (!string.IsNullOrEmpty(BatchUrl))
{
// 可回收时注册删除权限
if (RecyclableTrait.For <TData>().IsRecyclable)
{
foreach (var privilege in DeletePrivileges)
{
yield return(privilege);
}
}
// 注册永久删除权限
foreach (var privilege in DeleteForeverPrivilege)
{
yield return(privilege);
}
}
}
/// <summary>
/// 按回收站状态过滤数据
/// </summary>
/// <typeparam name="TData">数据类型</typeparam>
/// <param name="query">查询对象</param>
/// <param name="request">搜索请求</param>
public static IQueryable <TData> FilterByRecycleBin <TData>(
this IQueryable <TData> query, AjaxTableSearchRequest request)
{
var deleted = request.Conditions.GetOrDefault <bool>("Deleted");
var propertyName = RecyclableTrait.For <TData>().PropertyName;
return(query.Where(
ExpressionUtils.MakeMemberEqualiventExpression <TData>(propertyName, deleted)));
}
/// <summary>
/// 初始化
/// </summary>
public CrudPageBuilder()
{
IncludeCss = new List <string>();
IncludeJs = new List <string>();
ExtraTemplateArguments = new Dictionary <string, object>();
BatchActions = new Dictionary <string, Func <IActionResult> >();
BatchActions["delete_forever"] = BatchActionForDeleteForever;
if (RecyclableTrait.For <TData>().IsRecyclable)
{
BatchActions["delete"] = BatchActionForDelete;
BatchActions["recover"] = BatchActionForRecover;
}
}
/// <summary>
/// 获取选项列表
/// </summary>
/// <returns></returns>
public IEnumerable <ListItem> GetItems()
{
var databaseManager = Application.Ioc.Resolve <DatabaseManager>();
var propertyName = RecyclableTrait.For <TData>().PropertyName;
var expression = ExpressionUtils.MakeMemberEqualiventExpression <TData>(propertyName, false);
using (var context = databaseManager.CreateContext()) {
foreach (var data in context.Query <TData>().Where(expression))
{
yield return(new ListItem(data.ToString(), EntityTrait.GetPrimaryKey(data).ToString()));
}
}
}
/// <summary>
/// 获取指定Id的单个对象，找不到或标记已删除时返回null
/// </summary>
/// <param name="id">数据Id</param>
/// <returns></returns>
public virtual TData GetByIdWhereNotDeleted(object id)
{
// 判断类型是否可回收
var entityTrait = EntityTrait.For <TData>();
var recyclableTrait = RecyclableTrait.For <TData>();
if (!recyclableTrait.IsRecyclable)
{
throw new ArgumentException(string.Format("entity {0} not recyclable", typeof(TData).Name));
}
// 构建表达式 (data => data.Id == id && !data.Deleted)
var dataParam = Expression.Parameter(typeof(TData), "data");
var body = Expression.AndAlso(
Expression.Equal(
Expression.Property(dataParam, entityTrait.PrimaryKey),
Expression.Constant(id.ConvertOrDefault(entityTrait.PrimaryKeyType, null))),
Expression.Not(Expression.Property(dataParam, recyclableTrait.PropertyName)));
return(Get(Expression.Lambda <Func <TData, bool> >(body, dataParam)));
}
/// <summary>
/// 对增删查改页面使用的搜索栏构建器进行标准的设置
/// 添加以下菜单项
/// - 回收站（如果数据支持回收）
/// - 添加菜单（如果添加Url不是空）
/// 添加以下按钮
/// - 添加按钮（如果添加Url不是空）
/// </summary>
/// <typeparam name="TBuilder">后台应用类型</typeparam>
/// <param name="searchBar">搜索栏构建器</param>
/// <param name="keywordPlaceHolder">关键词的预留文本，传入后会自动翻译，可传入原文</param>
public static void StandardSetupForCrudPage <TBuilder>(
this AjaxTableSearchBarBuilder searchBar, string keywordPlaceHolder)
where TBuilder : class, ICrudPageBuilder, new()
{
var app = new TBuilder();
searchBar.KeywordPlaceHolder = new T(keywordPlaceHolder);
var addDividerOnce = new Lazy <Action>(
() => { searchBar.MenuItems.AddDivider(); return(() => { }); });
if (RecyclableTrait.For(app.DataType).IsRecyclable)
{
addDividerOnce.Value();
searchBar.MenuItems.AddRecycleBin();
}
if (!string.IsNullOrEmpty(app.AddUrl))
{
addDividerOnce.Value();
searchBar.MenuItems.AddAddActionForCrudPage <TBuilder>();
searchBar.BeforeItems.AddAddActionForCrudPage <TBuilder>();
}
}
/// <summary>
/// 批量恢复
/// 返回恢复的数量
/// </summary>
/// <param name="ids">Id列表</param>
/// <returns></returns>
public virtual long BatchRecover(IEnumerable <object> ids)
{
var databaseManager = Application.Ioc.Resolve <DatabaseManager>();
var propertyName = RecyclableTrait.For <TData>().PropertyName;
var setter = ReflectionUtils.MakeSetter <TData, bool>(propertyName);
var trait = EntityTrait.For <TData>();
long count = 0;
foreach (var id in ids)
{
var data = Context.Get(
ExpressionUtils.MakeMemberEqualiventExpression <TData>(
trait.PrimaryKey,
id.ConvertOrDefault(trait.PrimaryKeyType, null)));
if (data != null)
{
Context.Save(ref data, d => setter(d, false));
++count;
}
}
return(count);
}
/// <summary>
/// 添加删除相关的按钮
/// 如果数据类型可以回收，则添加批量删除或批量恢复和永久删除
/// 如果数据类型不可以回收，则添加批量永久删除
/// </summary>
/// <param name="column">Id列</param>
/// <param name="request">搜索请求</param>
/// <param name="dataType">数据类型</param>
/// <param name="typeName">类型名称</param>
/// <param name="batchUrl">批量操作使用的Url</param>
public static void AddDeleteActions(
this AjaxTableIdColumn column, AjaxTableSearchRequest request,
Type dataType, string typeName, string batchUrl)
{
// 判断需要添加哪些操作
bool addBatchDelete = false;
bool addBatchRecover = false;
bool addBatchDeleteForever = false;
if (RecyclableTrait.For(dataType).IsRecyclable)
{
var deleted = request.Conditions.GetOrDefault <bool>("Deleted");
addBatchDelete = !deleted;
addBatchRecover = deleted;
addBatchDeleteForever = deleted;
}
else
{
addBatchDeleteForever = true;
}
// 添加批量删除
typeName = new T(typeName);
var entityTrait = EntityTrait.For(dataType);
if (addBatchDelete)
{
column.AddConfirmActionForMultiChecked(
new T("Batch Delete"),
"fa fa-recycle",
string.Format(new T("Please select {0} to delete"), typeName),
new T("Batch Delete"),
ScriptStrings.ConfirmMessageTemplateForMultiSelected(
string.Format(new T("Sure to delete following {0}?"), typeName), "ToString"),
ScriptStrings.PostConfirmedActionForMultiSelected(
entityTrait.PrimaryKey, batchUrl + "?action=delete"),
new { type = "type-danger" });
}
// 添加批量恢复
if (addBatchRecover)
{
column.AddConfirmActionForMultiChecked(
new T("Batch Recover"),
"fa fa-history",
string.Format(new T("Please select {0} to recover"), typeName),
new T("Batch Recover"),
ScriptStrings.ConfirmMessageTemplateForMultiSelected(
string.Format(new T("Sure to recover following {0}?"), typeName), "ToString"),
ScriptStrings.PostConfirmedActionForMultiSelected(
entityTrait.PrimaryKey, batchUrl + "?action=recover"));
}
// 添加批量永久删除
if (addBatchDeleteForever)
{
column.AddConfirmActionForMultiChecked(
new T("Batch Delete Forever"),
"fa fa-remove",
string.Format(new T("Please select {0} to delete"), typeName),
new T("Batch Delete Forever"),
ScriptStrings.ConfirmMessageTemplateForMultiSelected(
string.Format(new T("Sure to delete following {0} forever?"), typeName), "ToString"),
ScriptStrings.PostConfirmedActionForMultiSelected(
entityTrait.PrimaryKey, batchUrl + "?action=delete_forever"),
new { type = "type-danger" });
}
}