/// <summary>
/// Creates a generic upload.
/// </summary>
/// <param name="model">The upload to create.</param>
/// <param name="unitOfWork">Unit of work.</param>
/// <returns>Upload populated with newly allocated upload identifier.</returns>
private Upload CreateUpload(CreateUploadModel model, IUnitOfWork unitOfWork)
{
// Validate create upload model
_uploadValidator.ValidateCreateUpload(model);
// Construct upload object
DateTime now = DateTime.UtcNow;
Upload upload = new Upload
{
TenantId = model.TenantId,
Created = now,
Updated = now,
Name = model.Name.Trim(),
Content = model.Content,
ContentType = model.ContentType.Trim().ToLower(),
Size = model.Content.Length,
UploadType = UploadType.Upload,
Committed = false
};
// Create upload and record newly allocated upload identifier
upload.UploadId = _uploadRepository.CreateUpload(upload, unitOfWork);
// Return upload object
return(upload);
}
/// <summary>
/// Creates an image.
/// </summary>
/// <param name="model">The upload to create.</param>
/// <param name="unitOfWork">Unit of work.</param>
/// <returns>Image populated with newly allocated upload identifier.</returns>
private Image CreateImage(CreateUploadModel model, IUnitOfWork unitOfWork)
{
// Validate create upload model
Drawing.Size?size = _uploadValidator.ValidateCreateImage(model);
// Construct image object
DateTime now = DateTime.UtcNow;
Image image = new Image
{
TenantId = model.TenantId,
Created = now,
Updated = now,
Name = model.Name.Trim(),
Content = model.Content,
ContentType = model.ContentType.Trim().ToLower(),
Size = model.Content.Length,
UploadType = UploadType.Image,
Committed = false,
Width = size.Value.Width,
Height = size.Value.Height
};
// Create image and record newly allocated upload identifier
image.UploadId = _uploadRepository.CreateImage(image, unitOfWork);
// Return image object
return(image);
}
/// <summary>
/// Checks that content type is specified and valid.
/// </summary>
/// <param name="model">Create upload details.</param>
/// <param name="keyPrefix">Validation key prefix.</param>
public void ValidateCreateContentType(CreateUploadModel model, string keyPrefix = null)
{
if (string.IsNullOrWhiteSpace(model.ContentType))
{
throw new ValidationErrorException(new ValidationError(UploadPropertyNames.ContentType, UploadResource.ContentTypeRequiredMessage, keyPrefix));
}
}
/// <summary>
/// Creates a new upload with uncommitted state.
/// </summary>
/// <param name="model">The upload to create.</param>
/// <param name="unitOfWork">Unit of work.</param>
/// <returns>Newly allocated upload identfier.</returns>
public long Create(CreateUploadModel model, IUnitOfWork unitOfWork = null)
{
// If we don't have a unit of work in place, create one now so that we can rollback all changes in case of failure
IUnitOfWork localUnitOfWork = unitOfWork == null?_unitOfWorkFactory.CreateUnitOfWork() : null;
// Try to create upload
try
{
// The first thing we need to check is that content type is specified
_uploadValidator.ValidateCreateContentType(model);
// Get upload type, which will determine how upload is stored
UploadType uploadType = GetUploadType(model.ContentType);
// Construct upload given upload type and content
Upload upload = null;
switch (uploadType)
{
case UploadType.Image:
upload = CreateImage(model, unitOfWork ?? localUnitOfWork);
break;
case UploadType.Upload:
upload = CreateUpload(model, unitOfWork ?? localUnitOfWork);
break;
}
// Create upload in storage
_storageService.Create(upload, GetUncommittedStorageHierarchy(), unitOfWork ?? localUnitOfWork);
// Commit work if local unit of work in place, then return newly allocated upload identifier
if (localUnitOfWork != null)
{
localUnitOfWork.Commit();
}
return(upload.UploadId);
}
catch
{
if (localUnitOfWork != null)
{
localUnitOfWork.Rollback();
}
throw;
}
finally
{
if (localUnitOfWork != null)
{
localUnitOfWork.Dispose();
}
}
}
/// <summary>
/// Validates information supplied to create a new image.
/// </summary>
/// <param name="model">Create image details.</param>
/// <param name="keyPrefix">Validation key prefix.</param>
/// <returns>Width and height of image.</returns>
public Size?ValidateCreateImage(CreateUploadModel model, string keyPrefix)
{
// Perform generic upload checks
ValidateCreateUpload(model, keyPrefix);
// Check that upload is image
Size?size = _imageAnalysisService.GetImageDimensions(model.Content);
if (size == null)
{
throw new ValidationErrorException(new ValidationError(UploadPropertyNames.Content, UploadResource.ImageInvalidMessage, keyPrefix));
}
// Return dimensions of image
return(size);
}
