4 files changed, 114 insertions, 2 deletions
diff --git a/synapse/storage/monthly_active_users.py b/synapse/storage/monthly_active_users.py
new file mode 100644
index 0000000000..373e828c0a
--- /dev/null
+++ b/synapse/storage/monthly_active_users.py
@@ -0,0 +1,89 @@
+from twisted.internet import defer
+
+from ._base import SQLBaseStore
+
+
+class MonthlyActiveUsersStore(SQLBaseStore):
+    def __init__(self, hs):
+        super(MonthlyActiveUsersStore, self).__init__(None, hs)
+        self._clock = hs.get_clock()
+
+    def reap_monthly_active_users(self):
+        """
+        Cleans out monthly active user table to ensure that no stale
+        entries exist.
+        Return:
+            defered, no return type
+        """
+        def _reap_users(txn):
+            thirty_days_ago = (
+                int(self._clock.time_msec()) - (1000 * 60 * 60 * 24 * 30)
+            )
+            sql = "DELETE FROM monthly_active_users WHERE timestamp < ?"
+            txn.execute(sql, (thirty_days_ago,))
+
+        return self.runInteraction("reap_monthly_active_users", _reap_users)
+
+    def get_monthly_active_count(self):
+        """
+            Generates current count of monthly active users.abs
+            return:
+                defered resolves to int
+        """
+        def _count_users(txn):
+            sql = """
+                SELECT COALESCE(count(*), 0) FROM (
+                    SELECT user_id FROM monthly_active_users
+                ) u
+            """
+            txn.execute(sql)
+            count, = txn.fetchone()
+            return count
+        return self.runInteraction("count_users", _count_users)
+
+    def upsert_monthly_active_user(self, user_id):
+        """
+            Updates or inserts monthly active user member
+            Arguments:
+                user_id (str): user to add/update
+        """
+        return self._simple_upsert(
+            desc="upsert_monthly_active_user",
+            table="monthly_active_users",
+            keyvalues={
+                "user_id": user_id,
+            },
+            values={
+                "timestamp": int(self._clock.time_msec()),
+            },
+            lock=False,
+        )
+
+    def clean_out_monthly_active_users(self):
+        pass
+
+    @defer.inlineCallbacks
+    def is_user_monthly_active(self, user_id):
+        """
+            Checks if a given user is part of the monthly active user group
+            Arguments:
+                user_id (str): user to add/update
+            Return:
+                bool : True if user part of group, False otherwise
+        """
+        user_present = yield self._simple_select_onecol(
+            table="monthly_active_users",
+            keyvalues={
+                "user_id": user_id,
+            },
+            retcol="user_id",
+            desc="is_user_monthly_active",
+        )
+        # jeff = self.cursor_to_dict(res)
+        result = False
+        if user_present:
+            result = True
+
+        defer.returnValue(
+            result
+        )
diff --git a/synapse/storage/prepare_database.py b/synapse/storage/prepare_database.py
index b290f834b3..b364719312 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 = 50
+SCHEMA_VERSION = 51
 
 dir_path = os.path.abspath(os.path.dirname(__file__))
 
diff --git a/synapse/storage/schema/delta/50/make_event_content_nullable.py b/synapse/storage/schema/delta/50/make_event_content_nullable.py
index 7d27342e39..6dd467b6c5 100644
--- a/synapse/storage/schema/delta/50/make_event_content_nullable.py
+++ b/synapse/storage/schema/delta/50/make_event_content_nullable.py
@@ -88,5 +88,5 @@ def run_upgrade(cur, database_engine, *args, **kwargs):
         "UPDATE sqlite_master SET sql=? WHERE tbl_name='events' AND type='table'",
         (sql, ),
     )
-    cur.execute("PRAGMA schema_version=%i" % (oldver+1,))
+    cur.execute("PRAGMA schema_version=%i" % (oldver + 1,))
     cur.execute("PRAGMA writable_schema=OFF")
diff --git a/synapse/storage/schema/delta/51/monthly_active_users.sql b/synapse/storage/schema/delta/51/monthly_active_users.sql
new file mode 100644
index 0000000000..b3c0e1a676
--- /dev/null
+++ b/synapse/storage/schema/delta/51/monthly_active_users.sql
@@ -0,0 +1,23 @@
+/* Copyright 2018 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.
+ */
+
+-- a table of users who have requested that their details be erased
+CREATE TABLE monthly_active_users (
+    user_id TEXT NOT NULL,
+    timestamp BIGINT NOT NULL
+);
+
+CREATE UNIQUE INDEX monthly_active_users_users ON monthly_active_users(user_id);
+CREATE INDEX monthly_active_users_time_stamp ON monthly_active_users(timestamp);