public static bool RemoveOcrRendition(this Record record)
{
bool removed = false;
for (uint i = 0; i < record.ChildRenditions.Count; i++)
{
RecordRendition rendition = record.ChildRenditions.getItem(i) as RecordRendition;
if ((RecordRendition)rendition != null && rendition.TypeOfRendition == RenditionType.Ocr)
{
Log.Debug($"Remove Rendition {rendition.Uri} from Record {record.Uri}");
rendition.Delete();
removed = true;
}
}
if (removed)
{
record.Save();
Log.Info($"Removed Ocr rendition from record {record.Uri}");
}
else
{
Log.Info($"No Ocr Rendition on record {record.Uri}");
}
return(removed);
}
public static void HandleEvent(Database db, TrimEvent evt)
{
Record record = null;
RecordRendition rendition = null;
try
{
record = db.FindTrimObjectByUri(BaseObjectTypes.Record, evt.ObjectUri) as Record;
if (evt.RelatedObjectType == BaseObjectTypes.RecordRendition && evt.EventType == Events.DocRenditionAdded)
{
var eventRendition = record.ChildRenditions.FindChildByUri(evt.RelatedObjectUri) as RecordRendition;
if (eventRendition != null && eventRendition.TypeOfRendition == RenditionType.Original)
{ // if added an original
rendition = eventRendition;
}
}
if (rendition != null)
{
RecordController.GenerateOcrRendition(record, rendition);
}
else
{
RecordController.UpdateOcrRendition(record);
}
}
catch (TrimException ex)
{
Log.Error(ex);
}
finally
{
record = null;
rendition = null;
}
}
public static bool HasOcrRendition(this Record record)
{
for (uint i = 0; i < record.ChildRenditions.Count; i++)
{
RecordRendition rendition = record.ChildRenditions.getItem(i) as RecordRendition;
if ((RecordRendition)rendition != null && rendition.TypeOfRendition == RenditionType.Ocr)
{
return(true);
}
}
return(false);
}
public static bool GenerateOcrRendition(Record record, RecordRendition sourceRendition)
{
bool success = false;
string extractedFilePath = string.Empty;
string ocrFilePath = string.Empty;
try
{
// get a temp working location on disk
var rootDirectory = Path.Combine(Path.GetTempPath(), "cmramble_ocr");
if (!Directory.Exists(rootDirectory))
{
Directory.CreateDirectory(rootDirectory);
}
// formulate file name to extract, delete if exists for some reason
extractedFilePath = Path.Combine(rootDirectory, $"{sourceRendition.Uri}.{sourceRendition.Extension}");
ocrFilePath = Path.Combine(rootDirectory, $"{sourceRendition.Uri}.txt");
FileHelper.Delete(extractedFilePath);
FileHelper.Delete(ocrFilePath);
// fetch document
var extract = sourceRendition.GetExtractDocument();
extract.FileName = Path.GetFileName(extractedFilePath);
extract.DoExtract(Path.GetDirectoryName(extractedFilePath), true, false, "");
if (!String.IsNullOrWhiteSpace(extract.FileName) && File.Exists(extractedFilePath))
{
ocrFilePath = TesseractOcr.ExtractFromFile(extractedFilePath);
// use record extension method that removes existing OCR rendition (if exists)
record.AddOcrRendition(ocrFilePath);
record.Save();
success = true;
}
}
catch (Exception ex)
{
}
finally
{
FileHelper.Delete(extractedFilePath);
FileHelper.Delete(ocrFilePath);
}
return(success);
}
