private ImageMergeBatch ReadBatchImageInfo(string batchNumber, DateTime processingDate, string jobFolder)
{
var batch = new ImageMergeBatch {
BatchNumber = batchNumber
};
var frontRegex = new Regex(string.Format(adapterConfiguration.ImageMergeFrontFileRegex),
RegexOptions.Compiled | RegexOptions.IgnoreCase);
//get all front filenames that match the regex, and also extract the trace number using the regex
var frontFiles = Directory
.GetFiles(jobFolder)
.Select(filename => new { filename, match = frontRegex.Match(filename) })
.Where(x => x.match.Success)
.Select(x => new { x.filename, traceNumber = x.match.Groups["trace"].Value })
.ToList();
if (!frontFiles.Any())
{
throw new InvalidOperationException(string.Format("No image files found for this job"));
}
//read all images
foreach (var frontFile in frontFiles)
{
Log.Verbose("Adding front file {@frontFile} to the merge result", frontFile);
var rearImageFilename = string.Format(adapterConfiguration.ImageMergeRearFileFormat, processingDate, frontFile.traceNumber);
//string traceNumber = ResolveTraceNumber(frontFile.traceNumber);
string traceNumber = RequestHelper.ResolveDocumentReferenceNumber(frontFile.traceNumber);
var voucher = new ImageMergeVoucher
{
TraceNumber = traceNumber,
FrontImageFilename = frontFile.filename,
RearImageFilename = frontFile.filename.Replace("FRONT", "REAR"),
};
batch.Vouchers.Add(voucher);
}
return(batch);
}
private async Task WriteMergedImageFilesAsync(string batchNumber, string targetDirectory, ImageMergeBatch batch)
{
var frontFileName = string.Format(@"{0}\{1}", targetDirectory, string.Format(adapterConfiguration.ImageMergeFrontFilename, batchNumber));
var rearFileName = string.Format(@"{0}\{1}", targetDirectory, string.Format(adapterConfiguration.ImageMergeRearFilename, batchNumber));
using (var mergedFrontFile = File.Create(frontFileName))
using (var mergedRearFile = File.Create(rearFileName))
{
long frontOffset = 0;
long rearOffset = 0;
//read and copy all images async
foreach (var voucher in batch.Vouchers)
{
var frontImageFileStream = File.OpenRead(voucher.FrontImageFilename);
var rearImageFileStream = File.OpenRead(voucher.RearImageFilename);
voucher.FrontLength = frontImageFileStream.Length;
voucher.RearLength = rearImageFileStream.Length;
voucher.FrontOffset = frontOffset;
voucher.RearOffset = rearOffset;
frontOffset += voucher.FrontLength;
rearOffset += voucher.RearLength;
var frontTask = frontImageFileStream.CopyToAsync(mergedFrontFile);
var rearTask = rearImageFileStream.CopyToAsync(mergedRearFile);
await Task.WhenAll(frontTask, rearTask);
}
}
}
