1 files changed, 92 insertions, 0 deletions
diff --git a/synapse/events/validator.py b/synapse/events/validator.py
new file mode 100644
index 0000000000..ebc6c30e62
--- /dev/null
+++ b/synapse/events/validator.py
@@ -0,0 +1,92 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014 OpenMarket Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from synapse.types import EventID, RoomID, UserID
+from synapse.api.errors import SynapseError
+from synapse.api.constants import EventTypes, Membership
+
+
+class EventValidator(object):
+
+    def validate(self, event):
+        EventID.from_string(event.event_id)
+        RoomID.from_string(event.room_id)
+
+        required = [
+            # "auth_events",
+            "content",
+            # "hashes",
+            "origin",
+            # "prev_events",
+            "sender",
+            "type",
+        ]
+
+        for k in required:
+            if not hasattr(event, k):
+                raise SynapseError(400, "Event does not have key %s" % (k,))
+
+        # Check that the following keys have string values
+        strings = [
+            "origin",
+            "sender",
+            "type",
+        ]
+
+        if hasattr(event, "state_key"):
+            strings.append("state_key")
+
+        for s in strings:
+            if not isinstance(getattr(event, s), basestring):
+                raise SynapseError(400, "Not '%s' a string type" % (s,))
+
+        if event.type == EventTypes.Member:
+            if "membership" not in event.content:
+                raise SynapseError(400, "Content has not membership key")
+
+            if event.content["membership"] not in Membership.LIST:
+                raise SynapseError(400, "Invalid membership key")
+
+        # Check that the following keys have dictionary values
+        # TODO
+
+        # Check that the following keys have the correct format for DAGs
+        # TODO
+
+    def validate_new(self, event):
+        self.validate(event)
+
+        UserID.from_string(event.sender)
+
+        if event.type == EventTypes.Message:
+            strings = [
+                "body",
+                "msgtype",
+            ]
+
+            self._ensure_strings(event.content, strings)
+
+        elif event.type == EventTypes.Topic:
+            self._ensure_strings(event.content, ["topic"])
+
+        elif event.type == EventTypes.Name:
+            self._ensure_strings(event.content, ["name"])
+
+    def _ensure_strings(self, d, keys):
+        for s in keys:
+            if s not in d:
+                raise SynapseError(400, "'%s' not in content" % (s,))
+            if not isinstance(d[s], basestring):
+                raise SynapseError(400, "Not '%s' a string type" % (s,))