Initial commit of the new MPTT based document indexing app

apps/document_indexing/api.py

@@ -0,0 +1,53 @@
+from django.utils.translation import ugettext_lazy as _
+
+from metadata.classes import MetadataObject
+
+#from filesystem_serving.conf.settings import MAX_RENAME_COUNT
+
+from document_indexing.models import Index, IndexInstance
+from document_indexing.conf.settings import AVAILABLE_INDEXING_FUNCTIONS
+
+
+def evaluate_index(eval_dict, document, node, parent_index_instance=None):
+    warnings = []
+    if node.enabled:
+        try:
+            result = eval(node.expression, eval_dict, AVAILABLE_INDEXING_FUNCTIONS)
+            index_instance, created = IndexInstance.objects.get_or_create(index=node, value=result, parent=parent_index_instance)
+            if node.link_document:
+                index_instance.documents.add(document)
+                
+            for children in node.get_children():
+                children_warnings = evaluate_index(eval_dict, document, children, index_instance)
+                warnings.extend(children_warnings)
+            
+        except NameError, exc:
+            warnings.append(_(u'Error in metadata indexing expression: %s') % exc)
+            #raise NameError()
+            #This should be a warning not an error
+            #pass
+        except Exception, exc:
+            warnings.append(_(u'Unable to create metadata indexing directory: %s') % exc)
+            
+    return warnings
+
+
+def update_indexes(document):
+    print 'update_indexes'
+    warnings = []
+
+    eval_dict = {}
+    eval_dict['document'] = document
+    metadata_dict = dict([(metadata.metadata_type.name, metadata.value) for metadata in document.documentmetadata_set.all() if metadata.value])
+    eval_dict['metadata'] = MetadataObject(metadata_dict)
+
+    for root in Index.objects.filter(parent=None):
+        #for node in root.get_children():
+        index_warnings = evaluate_index(eval_dict, document, root)
+        warnings.extend(index_warnings)
+
+    return warnings
+    
+    
+def delete_indexes(document):
+    print 'delete_indexes'