/// <summary>
/// Removes the media file.
/// </summary>
public async Task RemoveAsync(RemoveMediaRequestVM vm, ClaimsPrincipal principal)
{
var media = await _db.Media
.Include(x => x.Tags)
.GetAsync(x => x.Id == vm.Id && x.IsDeleted == false, "Медиа-файл не найден");
var prevState = await RequestUpdateAsync(vm.Id);
var changeset = await GetChangesetAsync(prevState, null, vm.Id, principal, null);
_db.Changes.Add(changeset);
if (vm.RemoveFile)
{
var user = await _userMgr.GetUserAsync(principal, "Пользователь не найден");
var canRemove = await _userMgr.IsInRoleAsync(user, nameof(UserRole.Admin));
if (canRemove)
{
foreach (var size in new [] { MediaSize.Original, MediaSize.Large, MediaSize.Medium }) // sic! leaving the .sm thumb
{
File.Delete(_env.GetMediaPath(media, size));
}
}
}
media.IsDeleted = true;
await ClearCacheAsync(media);
}
/// <summary>
/// Checks if the changeset can be reverted.
/// </summary>
private bool CanRevert(Changeset chg)
{
var chgType = GetChangeType(chg);
if (chgType == ChangesetType.Created || chgType == ChangesetType.Restored)
{
return(false);
}
if (chg.EditedMedia != null)
{
// if the file has been removed completely, revert is impossible
var file = _env.GetMediaPath(chg.EditedMedia);
return(File.Exists(file));
}
return(true);
}
