/// <summary>
/// 初始化类<see cref="MediaDirectory"/>。
/// </summary>
/// <param name="directory">存储文件夹。</param>
/// <param name="mfdb">数据库操作接口。</param>
/// <param name="sfdb">数据库操作接口。</param>
public MediaDirectory(IStorageDirectory directory, IDbContext <MediaFile> mfdb, IDbContext <StoredFile> sfdb)
{
_directory = directory;
_mfdb = mfdb;
_sfdb = sfdb;
//媒体文件夹。
_media = directory.GetPhysicalPath("media");
//缩略图文件夹
_thumbs = directory.GetPhysicalPath("media/thumbs");
}
/// <summary>
/// 清除已经删除的物理文件。
/// </summary>
/// <returns>返回删除任务。</returns>
public async Task ClearDeletedPhysicalFilesAsync()
{
var files = await _sfdb.AsQueryable()
.WithNolock()
.LeftJoin <MediaFile>((s, m) => s.FileId == m.FileId)
.Where <MediaFile>(x => x.Id == null)
.Select()
.AsEnumerableAsync();
foreach (var file in files)
{
var info = new FileInfo(_directory.GetPhysicalPath(file.Path));
if (info.Exists)
{//删除物理文件
if (info.Extension.IsPicture())
{
foreach (var current in info.Directory.GetFiles())
{
if (current.Name.StartsWith(file.FileId + ".", StringComparison.OrdinalIgnoreCase))
{
current.Delete();
}
}
}
else
{
info.Delete();
}
}
//删除数据库
await _sfdb.DeleteAsync(file.FileId);
}
}
/// <summary>
/// 初始化类<see cref="FileStorageCache"/>。
/// </summary>
/// <param name="cache">缓存接口。</param>
/// <param name="root">存储文件夹。</param>
/// <param name="db">缓存数据库操作接口。</param>
public FileStorageCache(IMemoryCache cache, IStorageDirectory root, IDbContext <StorageCache> db)
{
_cache = cache;
_db = db;
_cacheRoot = root.GetPhysicalPath("caches");
if (!Directory.Exists(_cacheRoot))
{
Directory.CreateDirectory(_cacheRoot);
}
}
/// <summary>
/// 上传用户头像。
/// </summary>
/// <param name="userId">用户Id。</param>
/// <param name="file">当前用户实例。</param>
/// <returns>返回上传任务。</returns>
public async Task <string> UploadAsync(int userId, IFormFile file)
{
var tempFile = await _storageDirectory.SaveToTempAsync(file);
tempFile = tempFile.Resize(Size, Size);
//上传头像新文件，把老文件删除
var path = _storageDirectory.GetPhysicalPath($"avatars/{userId}/");
if (Directory.Exists(path))
{
Directory.Delete(path, true);
}
path = Path.Combine(path, "default.png").MakeDirectory();
tempFile.MoveTo(path);
return($"/s-avatars/{userId}.png");
}
public EpubManager(IStorageDirectory storageDirectory)
{
_storageDirectory = storageDirectory;
_epubDirectory = storageDirectory.GetPhysicalPath("epub").MakeDirectory();
}