public async Task <OperationStatus> AddThumbnailFor(string fileID, Stream fileStream)
{
var opStatus = new OperationStatus();
AirshowUtils.ConfirmDirectoryExistsOrCreate(ImagesDirectory);
fileStream.Seek(0, SeekOrigin.Begin);
var pdfInput = GeneratePathForFileIdWithExtension(fileID, "pdf");
var jpegOutput = GeneratePathForFileIdWithExtension(fileID, "jpeg");
using (var phyisicalFileStream = File.Create(pdfInput))
{
await fileStream.CopyToAsync(phyisicalFileStream);
}
System.Diagnostics.Process clientProcess = new Process();
clientProcess.StartInfo.FileName = "java";
clientProcess.StartInfo.Arguments = @"-jar " + JarPath + " " + $"PDFThumbGenerator {pdfInput} {jpegOutput}";
clientProcess.Start();
clientProcess.WaitForExit();
File.Delete(pdfInput);
int code = clientProcess.ExitCode;
if (code != 0)
{
opStatus.ErrorMessageIfAny = "An error ocurred during the generation of the image";
}
return(opStatus);
}
public async Task <OperationResult <string> > SaveFile(Stream fileStream)
{
var fileId = Guid.NewGuid().ToString("N");
fileStream.Seek(0, SeekOrigin.Begin);
var thumbResult = await _thumbnailsRepo.AddThumbnailFor(fileId, fileStream);
if (thumbResult.ErrorMessageIfAny != null)
{
return(new OperationResult <string>
{
ErrorMessageIfAny = thumbResult.ErrorMessageIfAny
});
}
var newFile = new PresentationFile();
newFile.FileID = fileId;
await _context.PresentationFiles.AddAsync(newFile);
await _context.SaveChangesAsync();
var filePathResult = CreatePathFor(fileId);
if (filePathResult.ErrorMessageIfAny != null)
{
return(new OperationResult <string>
{
ErrorMessageIfAny = filePathResult.ErrorMessageIfAny
});
}
var fs = AirshowUtils.CreateFileToWriteAtPath(filePathResult.Value);
if (fs == null)
{
return(new OperationResult <string>
{
ErrorMessageIfAny = OperationStatus.kInvalidFileNameOrAlreadyExists
});
}
fileStream.Seek(0, SeekOrigin.Begin);
await fileStream.CopyToAsync(fs);
fs.Dispose();
return(new OperationResult <string>
{
Value = newFile.FileID
});
}
private OperationResult <string> GetOrCreateUploadsDirectory()
{
var directory = Directory.GetCurrentDirectory() + Path.DirectorySeparatorChar + "userUploads";
var result = AirshowUtils.ConfirmDirectoryExistsOrCreate(directory);
if (result.ErrorMessageIfAny != null)
{
return(new OperationResult <string>
{
ErrorMessageIfAny = result.ErrorMessageIfAny
});
}
return(new OperationResult <string>
{
Value = directory
});
}
