Support for extra_template_args in node view

This allows for wrapping the view function in another function which will provide additional args. Originally implemented in order to allow Dillo post view to provide the Project object to the view_embed template.

pillar/web/nodes/routes.py

@@ -108,7 +108,7 @@ def jstree(node_id):
 
 
 @blueprint.route("/<node_id>/view")
-def view(node_id):
+def view(node_id, extra_template_args: dict=None):
     api = system_util.pillar_api()
 
     # Get node, we'll embed linked objects later.
@@ -201,9 +201,6 @@ def view(node_id):
     if node.file and node.file_variations:
         node.file.length = max(var.length for var in node.file_variations)
 
-    if request.args.get('embed_project') == '1':
-        node.project = Project.find(node.project, api=api)
-
     if request.args.get('format') == 'json':
         node = node.to_dict()
         node['url_edit'] = url_for('nodes.edit', node_id=node['_id'])
@@ -225,6 +222,8 @@ def view(node_id):
 
     write_access = 'PUT' in (node.allowed_methods or set())
 
+    if extra_template_args is None:
+        extra_template_args = {}
     try:
         return render_template(template_path,
                                node_id=node._id,
@@ -233,7 +232,8 @@ def view(node_id):
                                children=children,
                                config=current_app.config,
                                write_access=write_access,
-                               api=api)
+                               api=api,
+                               **extra_template_args)
     except TemplateNotFound:
         log.error('Template %s does not exist for node type %s', template_path, node_type_name)
         return render_template('nodes/error_type_not_found.html',
@@ -243,7 +243,8 @@ def view(node_id):
                                children=children,
                                config=current_app.config,
                                write_access=write_access,
-                               api=api)
+                               api=api,
+                               **extra_template_args)
 
 
 def _view_handler_asset(node, template_path, template_action, link_allowed):