public static void DeleteFileByMetadata(FileMetadata metadata, CerebelloEntitiesAccessFilterWrapper db, IBlobStorageManager storage)
{
// deleting dependent files
var relatedFiles = db.FileMetadatas.Where(f => f.RelatedFileMetadataId == metadata.Id).ToList();
foreach (var relatedFile in relatedFiles)
{
DeleteFileByMetadata(relatedFile, db, storage);
}
// deleting file metadata and storage entries
storage.DeleteFileFromStorage(metadata.ContainerName, metadata.BlobName);
db.FileMetadatas.DeleteObject(metadata);
}
/// <summary>
/// Create a new FileMetadata object.
/// </summary>
/// <param name="id">Initial value of the Id property.</param>
/// <param name="containerName">Initial value of the ContainerName property.</param>
/// <param name="createdOn">Initial value of the CreatedOn property.</param>
/// <param name="practiceId">Initial value of the PracticeId property.</param>
/// <param name="sourceFileName">Initial value of the SourceFileName property.</param>
/// <param name="blobName">Initial value of the BlobName property.</param>
public static FileMetadata CreateFileMetadata(global::System.Int32 id, global::System.String containerName, global::System.DateTime createdOn, global::System.Int32 practiceId, global::System.String sourceFileName, global::System.String blobName)
{
FileMetadata fileMetadata = new FileMetadata();
fileMetadata.Id = id;
fileMetadata.ContainerName = containerName;
fileMetadata.CreatedOn = createdOn;
fileMetadata.PracticeId = practiceId;
fileMetadata.SourceFileName = sourceFileName;
fileMetadata.BlobName = blobName;
return fileMetadata;
}
/// <summary>
/// Deprecated Method for adding a new object to the FileMetadatas EntitySet. Consider using the .Add method of the associated ObjectSet<T> property instead.
/// </summary>
public void AddToFileMetadatas(FileMetadata fileMetadata)
{
base.AddObject("FileMetadatas", fileMetadata);
}
/// <summary>
/// Creates an action result with a thumbnail image of a file in the storage.
/// </summary>
/// <param name="originalMetadata">Metadata of the original image file.</param>
/// <param name="storage">The storage service used to store files.</param>
/// <param name="dateTimeService">Date time service used to get current date and time.</param>
/// <param name="maxWidth">Maximum width of the thumbnail image.</param>
/// <param name="maxHeight">Maximum height of the thumbnail image.</param>
/// <param name="useCache">Whether to use a cached thumbnail or not.</param>
/// <returns>The ActionResult containing the thumbnail image.</returns>
protected ActionResult GetOrCreateThumb(
FileMetadata originalMetadata,
IBlobStorageManager storage,
IDateTimeService dateTimeService,
int maxWidth,
int maxHeight,
bool useCache = true)
{
if (originalMetadata == null)
throw new ArgumentNullException("originalMetadata");
if (originalMetadata.OwnerUserId == this.DbUser.Id)
{
var fileNamePrefix = Path.GetDirectoryName(originalMetadata.BlobName) + "\\";
var normalFileName = StringHelper.NormalizeFileName(originalMetadata.SourceFileName);
var thumbName = string.Format(
"{0}\\{1}file-{2}-thumb-{4}x{5}-{3}",
originalMetadata.ContainerName,
fileNamePrefix,
originalMetadata.Id,
normalFileName,
maxWidth,
maxHeight);
var fileName = string.Format("{0}\\{1}", originalMetadata.ContainerName, originalMetadata.BlobName);
int originalMetadataId = originalMetadata.Id;
var metadataProvider = new DbFileMetadataProvider(this.db, dateTimeService, this.DbUser.PracticeId);
var thumbResult = ImageHelper.TryGetOrCreateThumb(
originalMetadataId,
maxWidth,
maxHeight,
fileName,
thumbName,
useCache,
storage,
metadataProvider);
switch (thumbResult.Status)
{
case CreateThumbStatus.Ok: return this.File(thumbResult.Data, thumbResult.ContentType);
case CreateThumbStatus.SourceFileNotFound: return new StatusCodeResult(HttpStatusCode.NotFound);
case CreateThumbStatus.SourceIsNotImage: return this.Redirect(this.Url.Content("~/Content/Images/App/FileIcons/generic-outline.png"));
case CreateThumbStatus.SourceImageTooLarge: return this.Redirect(this.Url.Content("~/Content/Images/App/FileIcons/generic-outline.png"));
default: throw new NotImplementedException();
}
}
return new StatusCodeResult(HttpStatusCode.NotFound);
}
private FileMetadata Create(
string containerName,
string sourceFileName,
string blobName,
int? relatedMetadataId,
string relationType,
DateTime? expirationDate,
int? ownerUserId,
string tag = null)
{
var md = new FileMetadata
{
CreatedOn = this.dateTimeService.UtcNow,
PracticeId = this.practiceId,
ContainerName = containerName,
SourceFileName = sourceFileName,
ExpirationDate = expirationDate,
BlobName = blobName,
RelatedFileMetadataId = relatedMetadataId,
RelationType = relationType,
OwnerUserId = ownerUserId,
Tag = tag,
};
this.actionsToSave.Enqueue(() => this.db.FileMetadatas.AddObject(md));
return md;
}
