Introducing image attachments

Before returning a response, check if the 'attachments' property is
defined. If yes, load the file (for the moment only images) in the
required variation, get the link and build a Markdown representation.
Search in the 'field' specified in the attachment and replace the
'slug' tag with the generated link.

pillar/application/__init__.py

@@ -344,8 +344,33 @@ def before_inserting_nodes(items):
             if project:
                 item['project'] = project['_id']
 
+def parse_attachments(response):
+    """Before returning a response, check if the 'attachments' property is
+    defined. If yes, load the file (for the moment only images) in the required
+    variation, get the link and build a Markdown representation. Search in the
+    'field' specified in the attachmentand replace the 'slug' tag with the
+    generated link.
+    """
+    if 'properties' in response and 'attachments' in response['properties']:
+        files_collection = app.data.driver.db['files']
+        for field in response['properties']['attachments']:
+            for attachment in response['properties']['attachments']:
+                field_name = attachment['field']
+                field_content = response[field_name]
+                for f in attachment['files']:
+                    slug = f['slug']
+                    slug_tag = "[{0}]".format(slug)
+                    f = files_collection.find_one({'_id': f['file']})
+                    size = f['size'] if 'size' in f else 'l'
+                    p = files_collection.find_one({'parent': f['_id'], 'size': size})
+                    l = generate_link(p['backend'], p['file_path'], str(p['project']))
+                    # Build Markdown img string
+                    l = '![{0}]({1} "{2}")'.format(slug, l, f['name'])
+                    response[field_name] = field_content.replace(slug_tag, l)
+
 
 app.on_fetched_item_nodes += before_returning_item_permissions
+app.on_fetched_item_nodes += parse_attachments
 app.on_fetched_resource_nodes += before_returning_resource_permissions
 app.on_fetched_item_node_types += before_returning_item_permissions
 app.on_fetched_resource_node_types += before_returning_resource_permissions

pillar/manage/node_types/asset.py

@@ -26,15 +26,22 @@ node_type_asset = {
         # We point to the original file (and use it to extract any relevant
         # variation useful for our scope).
         'file': _file_embedded_schema,
-        'description_attachments': {
+        'attachments': {
             'type': 'list',
             'schema': {
-                'type': 'dict',
+            'type': 'dict',
                 'schema': {
-                    'file': _file_embedded_schema,
+                    'field': {'type': 'string'},
-                    'url': {
+                    'files' : {
-                        'type': 'string',
+                        'type': 'list',
-                        'minlength': 1
+                        'schema': {
+                            'type': 'dict',
+                            'schema': {
+                                'file': _file_embedded_schema,
+                                'slug': {'type': 'string', 'minlength': 1},
+                                'size': {'type': 'string'}
+                            }
+                        }
                     }
                 }
             }
@@ -44,7 +51,7 @@ node_type_asset = {
         'status': {},
         'content_type': {'visible': False},
         'file': {'visible': False},
-        'description_attachments': {'visible': False},
+        'attachments': {'visible': False},
     },
     'permissions': {
         # 'groups': [{