Added per OCR queue transformation models and CRUD views to replace the CONVERTER_OCR_OPTIONS with the new refactored converter transformations systems

apps/ocr/managers.py

@@ -0,0 +1,41 @@
+from django.db import models
+from django.contrib.contenttypes.models import ContentType
+
+from ocr.exceptions import AlreadyQueued
+
+
+class DocumentQueueManager(models.Manager):
+    """
+    Module manager class to handle adding documents to an OCR document
+    queue
+    """
+    def queue_document(self, document, queue_name='default'):
+        document_queue = self.model.objects.get(name=queue_name)
+        if document_queue.queuedocument_set.filter(document=document):
+            raise AlreadyQueued
+
+        document_queue.queuedocument_set.create(document=document, delay=True)
+
+        return document_queue
+
+
+class QueueTransformationManager(models.Manager):
+    def get_for_object(self, obj):
+        ct = ContentType.objects.get_for_model(obj)
+        return self.model.objects.filter(content_type=ct).filter(object_id=obj.pk)
+
+    def get_for_object_as_list(self, obj):
+        warnings = []
+        transformations = []
+        for transformation in self.get_for_object(obj).values('transformation', 'arguments'):
+            try:
+                transformations.append(
+                    {
+                        'transformation': transformation['transformation'],
+                        'arguments': eval(transformation['arguments'], {})
+                    }
+                )
+            except Exception, e:
+                warnings.append(e)
+        
+        return transformations, warnings