/// <summary>
/// 按照发布顺序获取帖子列表
/// </summary>
/// <param name="pager"></param>
/// <returns></returns>
public async Task <Posts_Result> GetPostsAsync(Paginator pager)
{
using ATXDbContext db = new ATXDbContext();
pager.TotalRows = await db.Posts.CountAsync(p => p.State == (int)ShareEnum.State.Enabled);
List <Posts_Result.PostItem> list = await db.Posts.AsNoTracking()
.Where(p => p.State == (int)ShareEnum.State.Enabled)
.Include(p => p.File)
.Skip(pager.GetSkip())
.Take(pager.Rows)
.OrderByDescending(p => p.CreateDate)
.Select(o => new Posts_Result.PostItem
{
Id = o.Id,
Author = o.Author,
Description = o.Description,
SourceFilePath = o.File.Path,
ThumbnailPath = o.File.Thumbnail,
PublishDateTime = o.CreateDate.ToString("yyyy-MM-dd"),
Likes = o.Likes
})
.ToListAsync();
Posts_Result result = new Posts_Result
{
List = list
};
return(result);
}
/// <summary>
/// 今日的访问记录增加一
/// </summary>
public static async Task TodayVisitRecordIncreaseAsync()
{
DateTimeOffset todayStart, todayEnd;
(todayStart, todayEnd) = DateTimeOffset.Now.GetStartAndEnd();
using ATXDbContext db = new ATXDbContext();
DB.Tables.Record recordModel = await db.Records
.Where(r => r.CreateDate >= todayStart && r.CreateDate <= todayEnd)
.FirstOrDefaultAsync();
if (recordModel is null)
{
recordModel = new DB.Tables.Record
{
VisitCount = 1
};
_ = db.Records.Add(recordModel);
}
else
{
recordModel.VisitCount++;
}
_ = await db.SaveChangesAsync();
}
public async Task <Posts_Result> GetPostsAsync(Paginator pager)
{
/*
* 随机获取帖子
* 分页获取
* index: 当前页码
* rows: 每页行数
*/
using ATXDbContext db = new ATXDbContext();
pager.TotalRows = await db.Posts.CountAsync(p => p.State == (int)ShareEnum.State.Enabled);
List <Posts_Result.PostItem> list = await db.Posts
.FromSqlRaw($"SELECT * FROM POSTS WHERE STATE = {(int)ShareEnum.State.Enabled} ORDER BY RAND() LIMIT {pager.Rows}")
.Select(o => new Posts_Result.PostItem
{
Id = o.Id,
Author = o.Author,
Description = o.Description,
Type = o.File.Type,
SourceFilePath = o.File.Path,
ThumbnailPath = o.File.Thumbnail,
PublishDateTime = o.CreateDate.ToString("yyyy-MM-dd"),
Likes = o.Likes
})
.ToListAsync();
//List<Posts_Result.PostItem> list = await db.Posts.AsNoTracking()
// .Where(p => p.State == (int)ShareEnum.State.Enabled)
// .OrderBy(p => Guid.NewGuid())
// .Take(pager.Rows)
// .Select(o => new Posts_Result.PostItem
// {
// Id = o.Id,
// Author = o.Author,
// Description = o.Description,
// Type = o.File.Type,
// SourceFilePath = o.File.Path,
// ThumbnailPath = o.File.Thumbnail,
// PublishDateTime = o.CreateDate.ToString("yyyy-MM-dd"),
// Likes = o.Likes
// })
// .ToListAsync();
Posts_Result result = new Posts_Result
{
List = list
};
return(result);
}
public async Task <bool> Like(int id)
{
using ATXDbContext db = new ATXDbContext();
DB.Tables.Post model = await db.Posts.FirstOrDefaultAsync(p => p.Id == id);
if (model is null)
{
return(false);
}
model.Likes++;
int suc = await db.SaveChangesAsync();
return(suc == 1);
}
/// <summary>
/// 发布新帖
/// </summary>
/// <param name="model"></param>
/// <returns></returns>
public async Task <(bool, string)> PulishNewPostAsync(Models.NewPostInfo model)
{
bool suc = true;
string msg = "";
/*
* 先保存文件
* 会保存在数据库的 Files 表
* 返回的 fileId 为保存的 ID
*/
Files.File file = new Files.File();
if (model.File is null)
{
return(false, "需要上传文件");
}
int fileId = await file.SaveFileToDBAsync(model.File);
if (fileId == Files.File.NOT_FILES)
{
return(false, "文件上传失败");
}
using ATXDbContext db = new ATXDbContext();
DB.Tables.Post newPost = new DB.Tables.Post
{
Author = model.Author,
Description = model.Description,
FileId = fileId
};
db.Posts.Add(newPost);
// 添加今天的一条发布记录
await Records.Records.TodayPulishRecordIncreaseAsync();
if (await db.SaveChangesAsync() == 1)
{
return(suc, msg);
}
return(false, "发布失败");
}