3 files changed, 79 insertions, 1 deletions
diff --git a/synapse/storage/media_repository.py b/synapse/storage/media_repository.py
index 82bb61b811..5cca14ccb2 100644
--- a/synapse/storage/media_repository.py
+++ b/synapse/storage/media_repository.py
@@ -238,3 +238,64 @@ class MediaRepositoryStore(SQLBaseStore):
                 },
             )
         return self.runInteraction("delete_remote_media", delete_remote_media_txn)
+
+    def get_expired_url_cache(self, now_ts):
+        sql = (
+            "SELECT media_id FROM local_media_repository_url_cache"
+            " WHERE download_ts + expires < ?"
+            " ORDER BY download_ts + expires ASC"
+            " LIMIT 100"
+        )
+
+        def _get_expired_url_cache_txn(txn):
+            txn.execute(sql, (now_ts,))
+            return [row[0] for row in txn]
+
+        return self.runInteraction("get_expired_url_cache", _get_expired_url_cache_txn)
+
+    def delete_url_cache(self, media_ids):
+        sql = (
+            "DELETE FROM local_media_repository_url_cache"
+            " WHERE media_id = ?"
+        )
+
+        def _delete_url_cache_txn(txn):
+            txn.executemany(sql, [(media_id) for media_id in media_ids])
+
+        return self.runInteraction("delete_url_cache", _delete_url_cache_txn)
+
+    def get_url_cache_media_before(self, before_ts):
+        sql = (
+            "SELECT media_id FROM local_media_repository"
+            " WHERE created_ts < ?"
+            " ORDER BY created_ts ASC"
+            " LIMIT 100"
+        )
+
+        def _get_url_cache_media_before_txn(txn):
+            txn.execute(sql, (before_ts,))
+            return [row[0] for row in txn]
+
+        return self.runInteraction(
+            "get_url_cache_media_before", _get_url_cache_media_before_txn,
+        )
+
+    def delete_url_cache_media(self, media_ids):
+        def _delete_url_cache_media_txn(txn):
+            sql = (
+                "DELETE FROM local_media_repository"
+                " WHERE media_id = ?"
+            )
+
+            txn.executemany(sql, [(media_id) for media_id in media_ids])
+
+            sql = (
+                "DELETE FROM local_media_repository_thumbnails"
+                " WHERE media_id = ?"
+            )
+
+            txn.executemany(sql, [(media_id) for media_id in media_ids])
+
+        return self.runInteraction(
+            "delete_url_cache_media", _delete_url_cache_media_txn,
+        )
diff --git a/synapse/storage/prepare_database.py b/synapse/storage/prepare_database.py
index 72b670b83b..a0af8456f5 100644
--- a/synapse/storage/prepare_database.py
+++ b/synapse/storage/prepare_database.py
@@ -25,7 +25,7 @@ logger = logging.getLogger(__name__)
 
 # Remember to update this number every time a change is made to database
 # schema files, so the users will be informed on server restarts.
-SCHEMA_VERSION = 43
+SCHEMA_VERSION = 44
 
 dir_path = os.path.abspath(os.path.dirname(__file__))
 
diff --git a/synapse/storage/schema/delta/44/expire_url_cache.sql b/synapse/storage/schema/delta/44/expire_url_cache.sql
new file mode 100644
index 0000000000..96202bd2a6
--- /dev/null
+++ b/synapse/storage/schema/delta/44/expire_url_cache.sql
@@ -0,0 +1,17 @@
+/* Copyright 2017 New Vector 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.
+ */
+
+CREATE INDEX local_media_repository_url_idx ON local_media_repository(created_ts) WHERE url_cache IS NOT NULL;
+CREATE INDEX local_media_repository_url_cache_expires_idx ON local_media_repository_url_cache(download_ts + expires);