Quick-Search: Added Quick-search in the topbar

Changed how and what we store in elastic to unify it with how we store
things in mongodb so we can have more generic javascript code
to render the data.

Elastic changes:
  Added:
  Node.project.url

  Altered to store id instead of url
  Node.picture

  Made Post searchable

./manage.py elastic reset_index
./manage.py elastic reindex

Thanks to Pablo and Sybren

pillar/celery/search_index_tasks.py

@@ -1,4 +1,6 @@
 import logging
+
+import bleach
 from bson import ObjectId
 
 from pillar import current_app
@@ -10,7 +12,7 @@ from pillar.api.search import algolia_indexing
 log = logging.getLogger(__name__)
 
 
-INDEX_ALLOWED_NODE_TYPES = {'asset', 'texture', 'group', 'hdri'}
+INDEX_ALLOWED_NODE_TYPES = {'asset', 'texture', 'group', 'hdri', 'post'}
 
 
 SEARCH_BACKENDS = {
@@ -28,34 +30,6 @@ def _get_node_from_id(node_id: str):
     return node
 
 
-def _handle_picture(node: dict, to_index: dict):
-    """Add picture URL in-place to the to-be-indexed node."""
-
-    picture_id = node.get('picture')
-    if not picture_id:
-        return
-
-    files_collection = current_app.data.driver.db['files']
-    lookup = {'_id': ObjectId(picture_id)}
-    picture = files_collection.find_one(lookup)
-
-    for item in picture.get('variations', []):
-        if item['size'] != 't':
-            continue
-
-        # Not all files have a project...
-        pid = picture.get('project')
-        if pid:
-            link = generate_link(picture['backend'],
-                                 item['file_path'],
-                                 str(pid),
-                                 is_public=True)
-        else:
-            link = item['link']
-        to_index['picture'] = link
-        break
-
-
 def prepare_node_data(node_id: str, node: dict=None) -> dict:
     """Given a node id or a node document, return an indexable version of it.
 
@@ -86,25 +60,30 @@ def prepare_node_data(node_id: str, node: dict=None) -> dict:
     users_collection = current_app.data.driver.db['users']
     user = users_collection.find_one({'_id': ObjectId(node['user'])})
 
+    clean_description = bleach.clean(node.get('_description_html') or '', strip=True)
+    if not clean_description and node['node_type'] == 'post':
+        clean_description = bleach.clean(node['properties'].get('_content_html') or '', strip=True)
+
     to_index = {
         'objectID': node['_id'],
         'name': node['name'],
         'project': {
             '_id': project['_id'],
-            'name': project['name']
+            'name': project['name'],
+            'url': project['url'],
         },
         'created': node['_created'],
         'updated': node['_updated'],
         'node_type': node['node_type'],
+        'picture': node.get('picture') or '',
         'user': {
             '_id': user['_id'],
             'full_name': user['full_name']
         },
-        'description': node.get('description'),
+        'description': clean_description or None,
+        'is_free': False
     }
 
-    _handle_picture(node, to_index)
-
     # If the node has world permissions, compute the Free permission
     if 'world' in node.get('permissions', {}):
         if 'GET' in node['permissions']['world']: