Make sure transformation arguments are always valid.

mayan/apps/documents/api_views.py

@@ -247,8 +247,8 @@ class APIDocumentPageImageView(generics.RetrieveAPIView):
 
     def retrieve(self, request, *args, **kwargs):
         size = request.GET.get('size')
-        zoom = request.GET.get('zoom')
-        rotation = request.GET.get('rotation')
+        zoom = int(request.GET.get('zoom'))
+        rotation = int(request.GET.get('rotation'))
 
         task = task_generate_document_page_image.apply_async(
             kwargs=dict(

mayan/apps/documents/models.py

@@ -680,12 +680,10 @@ class DocumentPage(models.Model):
         # Convert arguments into transformations
         transformations = kwargs.get('transformations', [])
         size = kwargs.get('size', setting_display_size.value)
-        rotation = int(
-            kwargs.get('rotation', DEFAULT_ROTATION) or DEFAULT_ROTATION
-        ) % 360
-        zoom_level = int(
-            kwargs.get('zoom', DEFAULT_ZOOM_LEVEL) or DEFAULT_ZOOM_LEVEL
-        )
+
+        rotation = kwargs.get('rotation', DEFAULT_ROTATION)
+
+        zoom_level = kwargs.get('zoom', DEFAULT_ZOOM_LEVEL)
 
         if zoom_level < setting_zoom_min_level.value:
             zoom_level = setting_zoom_min_level.value

mayan/apps/documents/widgets.py

@@ -98,8 +98,8 @@ def document_html_widget(document_page, click_view=None, click_view_arguments=No
     document = document_page.document
 
     query_dict = {
-        'zoom': zoom,
-        'rotation': rotation,
+        'zoom': zoom or DEFAULT_ZOOM_LEVEL,
+        'rotation': rotation or DEFAULT_ROTATION,
         'size': size,
         'page': document_page.page_number
     }