Added parent info to retrieved task nodes.

Added an Eve hook that adds {'parent_info: {'node_type': 'type',
'name': '...'}} to returned task nodes.

attract/tasks/eve_hooks.py

@@ -0,0 +1,45 @@
+import logging
+
+from flask import current_app
+
+from attract.node_types.task import node_type_task
+
+log = logging.getLogger(__name__)
+
+
+def fetch_task_parent_info(node):
+    """Extends the node with some parent info.
+
+    This allows us to link to the shot the task is attached to.
+    However, such a link requires at least knowing the parent node type,
+    which we thus embed here.
+    """
+
+    if node.get('node_type') != node_type_task['name']:
+        return
+
+    parent_id = node.get('parent')
+    if not parent_id:
+        return
+
+    nodes_coll = current_app.data.driver.db['nodes']
+    parent = nodes_coll.find_one({'_id': parent_id},
+                                 projection={'node_type': 1,
+                                             'name': 1})
+    if parent is None:
+        log.warning("Task node %s has parent %s, but the parent doesn't exist.",
+                    node['_id'], parent_id)
+        return
+
+    parent.pop('_id')  # always there, but also already included in the node.
+    node['parent_info'] = parent
+
+
+def fetch_tasks_parent_info(nodes):
+    for node in nodes['_items']:
+        fetch_task_parent_info(node)
+
+
+def setup_app(app):
+    app.on_fetched_item_nodes += fetch_task_parent_info
+    app.on_fetched_resource_nodes += fetch_tasks_parent_info