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+# -*- coding: utf-8 -*-
+# Copyright 2014 matrix.org
+#
+# 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.api.events.room import (
+    RoomTopicEvent, MessageEvent, RoomMemberEvent, FeedbackEvent,
+    InviteJoinEvent, RoomConfigEvent
+)
+
+from synapse.util.stringutils import random_string
+
+
+class EventFactory(object):
+
+    _event_classes = [
+        RoomTopicEvent,
+        MessageEvent,
+        RoomMemberEvent,
+        FeedbackEvent,
+        InviteJoinEvent,
+        RoomConfigEvent
+    ]
+
+    def __init__(self):
+        self._event_list = {}  # dict of TYPE to event class
+        for event_class in EventFactory._event_classes:
+            self._event_list[event_class.TYPE] = event_class
+
+    def create_event(self, etype=None, **kwargs):
+        kwargs["type"] = etype
+        if "event_id" not in kwargs:
+            kwargs["event_id"] = random_string(10)
+
+        try:
+            handler = self._event_list[etype]
+        except KeyError:  # unknown event type
+            # TODO allow custom event types.
+            raise NotImplementedError("Unknown etype=%s" % etype)
+
+        return handler(**kwargs)