added permissions api and websocket stuff

backend/models/user_model.py

@@ -486,6 +486,22 @@ class Permission(db.Model):
                              back_populates='permissions')
     access_control_entry = db.relationship('AccessControlEntry', back_populates='required_permission')
 
+    @staticmethod
+    def get_by_name(name):
+        """
+        Find permission by name
+        :param name:
+        :return:
+        """
+        return Permission.query.filter(Permission.name == name).first()
+
+    @staticmethod
+    def get_all():
+        """
+        Return all permissions
+        :return:
+        """
+        return Permission.query.all()
 
 @event.listens_for(User.__table__, 'after_create')
 def insert_initial_users(*args, **kwargs):