public async Task <ResponseMessage> SongClollectionDeleted([FromBody] SongCollectionRequest request)
{
// 日志输出：请求体
Console.WriteLine("WS------ Request: \r\n" + JsonUtil.ToJson(request));
// 创建响应体
ResponseMessage response = new ResponseMessage();
// 模型验证
if (!Util.ModelValidCheck(ModelState, response))
{
return(response);
}
try
{
// 业务处理
await Manager.CollectionSongCancel(response, request, default(CancellationToken));
}
catch (Exception e)
{
response.Code = ResponseDefine.ServiceError;
response.Message += "\r\n" + e.Message;
// 日志输出：服务器错误
Console.WriteLine("WS------ ServiceError: \r\n" + e);
}
// 日志输出：响应体
Console.WriteLine("WS------ Response: \r\n" + response != null ? JsonUtil.ToJson(response) : "");
return(response);
}
/// <summary>
/// 取消收藏歌曲
/// </summary>
/// <param name="response"></param>
/// <param name="request"></param>
/// <param name="cancellationToken"></param>
public async Task CollectionSongCancel([Required] ResponseMessage response, [Required] SongCollectionRequest request, CancellationToken cancellationToken = default(CancellationToken))
{
// Check arguments.
if (request.User == null || request.User.Id == null)
{
Def.Response.Wrap(response, Def.Response.BadRequsetCode, "请求体未包含系统用户信息，用户未登陆不能进行收藏歌曲操作");
return;
}
if (request.SongId == null)
{
Def.Response.Wrap(response, Def.Response.BadRequsetCode, "取消歌曲收藏，其ID不能为空");
return;
}
// Check whether user exist.
var user = TheUsers.ById(request.User.Id).SingleOrDefault();
if (user == null)
{
Def.Response.Wrap(response, Def.Response.NotFoundCode, Def.User.NotFoundMsg);
return;
}
// Check song exist.
var songs = TheSongs.ById(request.SongId);
if (songs.Count() == 0)
{
Def.Response.Wrap(response, Def.Response.BadRequsetCode, "你所取消收藏的歌曲不存在");
return;
}
// Check play list exist.
var playListId = TheUsers.FindPlayListIdByType(request.User.Id, Def.PlayList.Type.Collection).SingleOrDefault();
if (playListId == null)
{
Def.Response.Wrap(response, Def.Response.NotFoundCode, "收藏歌单未找到，可能的原因是创建账号时没有默认创建收藏歌单！");
return;
}
// Check the correlation between songs and songs.
var playListSong = _RelPlayListSongStore.ById(request.User.Id, playListId, request.SongId).SingleOrDefault();
if (playListSong == null)
{
Def.Response.Append(response, "你所取消收藏的歌曲不在你的收藏歌单中！"); // 修改ResponseMessage方法，添加追加函数？
return;
}
else
{
await _RelPlayListSongStore.Delete(request.User.Id, playListSong, cancellationToken);
response.Append("歌曲取消收藏成功！");
}
}
/// <summary>
/// 用户收藏歌曲，通过UserId在UserPlayList中找到RecommendPlayList，在PlayListSong中添加记录，需要对SongId进行有效性验证
/// </summary>
/// <param name="userId">用户ID</param>
/// <param name="songId">歌曲ID</param>
public async Task CollectionSongAsync([Required] ResponseMessage response, [Required] SongCollectionRequest request, CancellationToken cancellationToken = default(CancellationToken))
{
if (request.User == null || request.User.Id == null)
{
response.Code = ResponseDefine.BadRequset;
response.Message += "\r\n" + "请求体未包含系统用户信息，用户未登陆不能进行收藏歌曲操作";
return;
}
// 判断用户是否存在
//var user = await TheUsers.ReadAsync(a => a.Where(b => b.Id == request.User.Id), cancellationToken);
var user = TheUsers.ById(request.User.Id).SingleOrDefault();
if (user == null)
{
response.Code = ResponseDefine.NotFound;
response.Message += "\r\n" + Def.User.NotFoundMsg;
return;
}
// 找到PlayListId
var RecommendPlayListId = await _RelUserPlayListStore.ReadAsync(a => a.Where(b => b.UserId == request.User.Id && b.Type == Def.PlayList.Type.Recommend).Select(c => c.PlayListId), cancellationToken);
// 找不到歌单
if (RecommendPlayListId == null)
{
response.Code = ResponseDefine.NotFound;
response.Message += "\r\n" + Def.PlayList.NotFoundMsg;
return;
}
// 判断是否已经收藏
var playListSong = _RelPlayListSongStore.BySongId(user.Id, request.SongId).SingleOrDefault();
if (playListSong == null)
{
// 判断歌曲是否存在
await _RelPlayListSongStore.Create(user.Id, RecommendPlayListId, request.SongId, cancellationToken);
}
else
{
response.Code = ResponseDefine.PostRepeat;
}
}
public Task <List <Song> > Handle(SongCollectionRequest collectionRequest, CancellationToken cancellationToken)
{
var songs = _songRepository.Get();
return(Task.FromResult(_objectMapper.Map <List <Song> >(songs)));
}
