Merge pull request #307 from matrix-org/erikj/search

Add basic search API

10 files changed, 365 insertions, 2 deletions

diff --git a/synapse/handlers/__init__.py b/synapse/handlers/__init__.py
index 8725c3c420..87b4d381c7 100644
--- a/synapse/handlers/__init__.py
+++ b/synapse/handlers/__init__.py
@@ -32,6 +32,7 @@ from .sync import SyncHandler
 from .auth import AuthHandler
 from .identity import IdentityHandler
 from .receipts import ReceiptsHandler
+from .search import SearchHandler
 
 
 class Handlers(object):
@@ -68,3 +69,4 @@ class Handlers(object):
         self.sync_handler = SyncHandler(hs)
         self.auth_handler = AuthHandler(hs)
         self.identity_handler = IdentityHandler(hs)
+        self.search_handler = SearchHandler(hs)
diff --git a/synapse/handlers/search.py b/synapse/handlers/search.py
new file mode 100644
index 0000000000..22808b9c07
--- /dev/null
+++ b/synapse/handlers/search.py
@@ -0,0 +1,93 @@
+# -*- coding: utf-8 -*-
+# Copyright 2015 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 twisted.internet import defer
+
+from ._base import BaseHandler
+
+from synapse.api.constants import Membership
+from synapse.api.errors import SynapseError
+from synapse.events.utils import serialize_event
+
+import logging
+
+
+logger = logging.getLogger(__name__)
+
+
+class SearchHandler(BaseHandler):
+
+    def __init__(self, hs):
+        super(SearchHandler, self).__init__(hs)
+
+    @defer.inlineCallbacks
+    def search(self, user, content):
+        """Performs a full text search for a user.
+
+        Args:
+            user (UserID)
+            content (dict): Search parameters
+
+        Returns:
+            dict to be returned to the client with results of search
+        """
+
+        try:
+            search_term = content["search_categories"]["room_events"]["search_term"]
+            keys = content["search_categories"]["room_events"].get("keys", [
+                "content.body", "content.name", "content.topic",
+            ])
+        except KeyError:
+            raise SynapseError(400, "Invalid search query")
+
+        # TODO: Search through left rooms too
+        rooms = yield self.store.get_rooms_for_user_where_membership_is(
+            user.to_string(),
+            membership_list=[Membership.JOIN],
+            # membership_list=[Membership.JOIN, Membership.LEAVE, Membership.Ban],
+        )
+        room_ids = set(r.room_id for r in rooms)
+
+        # TODO: Apply room filter to rooms list
+
+        rank_map, event_map = yield self.store.search_msgs(room_ids, search_term, keys)
+
+        allowed_events = yield self._filter_events_for_client(
+            user.to_string(), event_map.values()
+        )
+
+        # TODO: Filter allowed_events
+        # TODO: Add a limit
+
+        time_now = self.clock.time_msec()
+
+        results = {
+            e.event_id: {
+                "rank": rank_map[e.event_id],
+                "result": serialize_event(e, time_now)
+            }
+            for e in allowed_events
+        }
+
+        logger.info("Found %d results", len(results))
+
+        defer.returnValue({
+            "search_categories": {
+                "room_events": {
+                    "results": results,
+                    "count": len(results)
+                }
+            }
+        })
diff --git a/synapse/rest/client/v1/room.py b/synapse/rest/client/v1/room.py
index 1f45fcc6f1..4cee1c1599 100644
--- a/synapse/rest/client/v1/room.py
+++ b/synapse/rest/client/v1/room.py
@@ -555,6 +555,22 @@ class RoomTypingRestServlet(ClientV1RestServlet):
         defer.returnValue((200, {}))
 
 
+class SearchRestServlet(ClientV1RestServlet):
+    PATTERN = client_path_pattern(
+        "/search$"
+    )
+
+    @defer.inlineCallbacks
+    def on_POST(self, request):
+        auth_user, _ = yield self.auth.get_user_by_req(request)
+
+        content = _parse_json(request)
+
+        results = yield self.handlers.search_handler.search(auth_user, content)
+
+        defer.returnValue((200, results))
+
+
 def _parse_json(request):
     try:
         content = json.loads(request.content.read())
@@ -611,3 +627,4 @@ def register_servlets(hs, http_server):
     RoomInitialSyncRestServlet(hs).register(http_server)
     RoomRedactEventRestServlet(hs).register(http_server)
     RoomTypingRestServlet(hs).register(http_server)
+    SearchRestServlet(hs).register(http_server)
diff --git a/synapse/storage/__init__.py b/synapse/storage/__init__.py
index 48a0633746..a1bd9c4ce9 100644
--- a/synapse/storage/__init__.py
+++ b/synapse/storage/__init__.py
@@ -40,6 +40,7 @@ from .filtering import FilteringStore
 from .end_to_end_keys import EndToEndKeyStore
 
 from .receipts import ReceiptsStore
+from .search import SearchStore
 
 
 import logging
@@ -69,6 +70,7 @@ class DataStore(RoomMemberStore, RoomStore,
                 EventsStore,
                 ReceiptsStore,
                 EndToEndKeyStore,
+                SearchStore,
                 ):
 
     def __init__(self, hs):
diff --git a/synapse/storage/_base.py b/synapse/storage/_base.py
index 693784ad38..218e708054 100644
--- a/synapse/storage/_base.py
+++ b/synapse/storage/_base.py
@@ -519,7 +519,7 @@ class SQLBaseStore(object):
                                   allow_none=False,
                                   desc="_simple_select_one_onecol"):
         """Executes a SELECT query on the named table, which is expected to
-        return a single row, returning a single column from it."
+        return a single row, returning a single column from it.
 
         Args:
             table : string giving the table name
diff --git a/synapse/storage/events.py b/synapse/storage/events.py
index 416ef6af93..e6c1abfc27 100644
--- a/synapse/storage/events.py
+++ b/synapse/storage/events.py
@@ -307,6 +307,8 @@ class EventsStore(SQLBaseStore):
                 self._store_room_name_txn(txn, event)
             elif event.type == EventTypes.Topic:
                 self._store_room_topic_txn(txn, event)
+            elif event.type == EventTypes.Message:
+                self._store_room_message_txn(txn, event)
             elif event.type == EventTypes.Redaction:
                 self._store_redaction(txn, event)
 
diff --git a/synapse/storage/room.py b/synapse/storage/room.py
index 5e07b7e0e5..13441fcdce 100644
--- a/synapse/storage/room.py
+++ b/synapse/storage/room.py
@@ -19,6 +19,7 @@ from synapse.api.errors import StoreError
 
 from ._base import SQLBaseStore
 from synapse.util.caches.descriptors import cachedInlineCallbacks
+from .engines import PostgresEngine, Sqlite3Engine
 
 import collections
 import logging
@@ -175,6 +176,10 @@ class RoomStore(SQLBaseStore):
                 },
             )
 
+            self._store_event_search_txn(
+                txn, event, "content.topic", event.content["topic"]
+            )
+
     def _store_room_name_txn(self, txn, event):
         if hasattr(event, "content") and "name" in event.content:
             self._simple_insert_txn(
@@ -187,6 +192,33 @@ class RoomStore(SQLBaseStore):
                 }
             )
 
+            self._store_event_search_txn(
+                txn, event, "content.name", event.content["name"]
+            )
+
+    def _store_room_message_txn(self, txn, event):
+        if hasattr(event, "content") and "body" in event.content:
+            self._store_event_search_txn(
+                txn, event, "content.body", event.content["body"]
+            )
+
+    def _store_event_search_txn(self, txn, event, key, value):
+        if isinstance(self.database_engine, PostgresEngine):
+            sql = (
+                "INSERT INTO event_search (event_id, room_id, key, vector)"
+                " VALUES (?,?,?,to_tsvector('english', ?))"
+            )
+        elif isinstance(self.database_engine, Sqlite3Engine):
+            sql = (
+                "INSERT INTO event_search (event_id, room_id, key, value)"
+                " VALUES (?,?,?,?)"
+            )
+        else:
+            # This should be unreachable.
+            raise Exception("Unrecognized database engine")
+
+        txn.execute(sql, (event.event_id, event.room_id, key, value,))
+
     @cachedInlineCallbacks()
     def get_room_name_and_aliases(self, room_id):
         def f(txn):
diff --git a/synapse/storage/schema/delta/24/fts.py b/synapse/storage/schema/delta/24/fts.py
new file mode 100644
index 0000000000..0c752d8426
--- /dev/null
+++ b/synapse/storage/schema/delta/24/fts.py
@@ -0,0 +1,123 @@
+# Copyright 2015 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.
+
+import logging
+
+from synapse.storage.prepare_database import get_statements
+from synapse.storage.engines import PostgresEngine, Sqlite3Engine
+
+import ujson
+
+logger = logging.getLogger(__name__)
+
+
+POSTGRES_SQL = """
+CREATE TABLE event_search (
+    event_id TEXT,
+    room_id TEXT,
+    key TEXT,
+    vector tsvector
+);
+
+INSERT INTO event_search SELECT
+    event_id, room_id, 'content.body',
+    to_tsvector('english', json::json->'content'->>'body')
+    FROM events NATURAL JOIN event_json WHERE type = 'm.room.message';
+
+INSERT INTO event_search SELECT
+    event_id, room_id, 'content.name',
+    to_tsvector('english', json::json->'content'->>'name')
+    FROM events NATURAL JOIN event_json WHERE type = 'm.room.name';
+
+INSERT INTO event_search SELECT
+    event_id, room_id, 'content.topic',
+    to_tsvector('english', json::json->'content'->>'topic')
+    FROM events NATURAL JOIN event_json WHERE type = 'm.room.topic';
+
+
+CREATE INDEX event_search_fts_idx ON event_search USING gin(vector);
+CREATE INDEX event_search_ev_idx ON event_search(event_id);
+CREATE INDEX event_search_ev_ridx ON event_search(room_id);
+"""
+
+
+SQLITE_TABLE = (
+    "CREATE VIRTUAL TABLE event_search USING fts3 ( event_id, room_id, key, value)"
+)
+
+
+def run_upgrade(cur, database_engine, *args, **kwargs):
+    if isinstance(database_engine, PostgresEngine):
+        run_postgres_upgrade(cur)
+        return
+
+    if isinstance(database_engine, Sqlite3Engine):
+        run_sqlite_upgrade(cur)
+        return
+
+
+def run_postgres_upgrade(cur):
+    for statement in get_statements(POSTGRES_SQL.splitlines()):
+        cur.execute(statement)
+
+
+def run_sqlite_upgrade(cur):
+        cur.execute(SQLITE_TABLE)
+
+        rowid = -1
+        while True:
+            cur.execute(
+                "SELECT rowid, json FROM event_json"
+                " WHERE rowid > ?"
+                " ORDER BY rowid ASC LIMIT 100",
+                (rowid,)
+            )
+
+            res = cur.fetchall()
+
+            if not res:
+                break
+
+            events = [
+                ujson.loads(js)
+                for _, js in res
+            ]
+
+            rowid = max(rid for rid, _ in res)
+
+            rows = []
+            for ev in events:
+                if ev["type"] == "m.room.message":
+                    rows.append((
+                        ev["event_id"], ev["room_id"], "content.body",
+                        ev["content"]["body"]
+                    ))
+                if ev["type"] == "m.room.name":
+                    rows.append((
+                        ev["event_id"], ev["room_id"], "content.name",
+                        ev["content"]["name"]
+                    ))
+                if ev["type"] == "m.room.topic":
+                    rows.append((
+                        ev["event_id"], ev["room_id"], "content.topic",
+                        ev["content"]["topic"]
+                    ))
+
+            if rows:
+                logger.info(rows)
+                cur.executemany(
+                    "INSERT INTO event_search (event_id, room_id, key, value)"
+                    " VALUES (?,?,?,?)",
+                    rows
+                )
diff --git a/synapse/storage/search.py b/synapse/storage/search.py
new file mode 100644
index 0000000000..a3c69c5ab3
--- /dev/null
+++ b/synapse/storage/search.py
@@ -0,0 +1,93 @@
+# -*- coding: utf-8 -*-
+# Copyright 2015 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 twisted.internet import defer
+
+from _base import SQLBaseStore
+from synapse.storage.engines import PostgresEngine, Sqlite3Engine
+
+
+class SearchStore(SQLBaseStore):
+    @defer.inlineCallbacks
+    def search_msgs(self, room_ids, search_term, keys):
+        """Performs a full text search over events with given keys.
+
+        Args:
+            room_ids (list): List of room ids to search in
+            search_term (str): Search term to search for
+            keys (list): List of keys to search in, currently supports
+                "content.body", "content.name", "content.topic"
+
+        Returns:
+            2-tuple of (dict event_id -> rank, dict event_id -> event)
+        """
+        clauses = []
+        args = []
+
+        clauses.append(
+            "room_id IN (%s)" % (",".join(["?"] * len(room_ids)),)
+        )
+        args.extend(room_ids)
+
+        local_clauses = []
+        for key in keys:
+            local_clauses.append("key = ?")
+            args.append(key)
+
+        clauses.append(
+            "(%s)" % (" OR ".join(local_clauses),)
+        )
+
+        if isinstance(self.database_engine, PostgresEngine):
+            sql = (
+                "SELECT ts_rank_cd(vector, query) AS rank, event_id"
+                " FROM plainto_tsquery('english', ?) as query, event_search"
+                " WHERE vector @@ query"
+            )
+        elif isinstance(self.database_engine, Sqlite3Engine):
+            sql = (
+                "SELECT 0 as rank, event_id FROM event_search"
+                " WHERE value MATCH ?"
+            )
+        else:
+            # This should be unreachable.
+            raise Exception("Unrecognized database engine")
+
+        for clause in clauses:
+            sql += " AND " + clause
+
+        # We add an arbitrary limit here to ensure we don't try to pull the
+        # entire table from the database.
+        sql += " ORDER BY rank DESC LIMIT 500"
+
+        results = yield self._execute(
+            "search_msgs", self.cursor_to_dict, sql, *([search_term] + args)
+        )
+
+        events = yield self._get_events([r["event_id"] for r in results])
+
+        event_map = {
+            ev.event_id: ev
+            for ev in events
+        }
+
+        defer.returnValue((
+            {
+                r["event_id"]: r["rank"]
+                for r in results
+                if r["event_id"] in event_map
+            },
+            event_map
+        ))
diff --git a/synapse/storage/state.py b/synapse/storage/state.py
index 6f2a50d585..acfb322a53 100644
--- a/synapse/storage/state.py
+++ b/synapse/storage/state.py
@@ -214,7 +214,6 @@ class StateStore(SQLBaseStore):
         that are in the `types` list.
 
         Args:
-            room_id (str)
             event_ids (list)
             types (list): List of (type, state_key) tuples which are used to
                 filter the state fetched. `state_key` may be None, which matches