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-rw-r--r--synapse/storage/databases/main/metrics.py129
1 files changed, 129 insertions, 0 deletions
diff --git a/synapse/storage/databases/main/metrics.py b/synapse/storage/databases/main/metrics.py
index e3a544d9b2..dc0bbc56ac 100644
--- a/synapse/storage/databases/main/metrics.py
+++ b/synapse/storage/databases/main/metrics.py
@@ -316,6 +316,135 @@ class ServerMetricsStore(EventPushActionsWorkerStore, SQLBaseStore):
 
         return await self.db_pool.runInteraction("count_r30_users", _count_r30_users)
 
+    async def count_r30v2_users(self) -> Dict[str, int]:
+        """
+        Counts the number of 30 day retained users, defined as users that:
+         - Appear more than once in the past 60 days
+         - Have more than 30 days between the most and least recent appearances that
+           occurred in the past 60 days.
+
+        (This is the second version of this metric, hence R30'v2')
+
+        Returns:
+             A mapping from client type to the number of 30-day retained users for that client.
+
+             The dict keys are:
+              - "all" (a combined number of users across any and all clients)
+              - "android" (Element Android)
+              - "ios" (Element iOS)
+              - "electron" (Element Desktop)
+              - "web" (any web application -- it's not possible to distinguish Element Web here)
+        """
+
+        def _count_r30v2_users(txn):
+            thirty_days_in_secs = 86400 * 30
+            now = int(self._clock.time())
+            sixty_days_ago_in_secs = now - 2 * thirty_days_in_secs
+            one_day_from_now_in_secs = now + 86400
+
+            # This is the 'per-platform' count.
+            sql = """
+                SELECT
+                    client_type,
+                    count(client_type)
+                FROM
+                    (
+                        SELECT
+                            user_id,
+                            CASE
+                                WHEN
+                                    LOWER(user_agent) LIKE '%%riot%%' OR
+                                    LOWER(user_agent) LIKE '%%element%%'
+                                    THEN CASE
+                                        WHEN
+                                            LOWER(user_agent) LIKE '%%electron%%'
+                                            THEN 'electron'
+                                        WHEN
+                                            LOWER(user_agent) LIKE '%%android%%'
+                                            THEN 'android'
+                                        WHEN
+                                            LOWER(user_agent) LIKE '%%ios%%'
+                                            THEN 'ios'
+                                        ELSE 'unknown'
+                                    END
+                                WHEN
+                                    LOWER(user_agent) LIKE '%%mozilla%%' OR
+                                    LOWER(user_agent) LIKE '%%gecko%%'
+                                    THEN 'web'
+                                ELSE 'unknown'
+                            END as client_type
+                        FROM
+                            user_daily_visits
+                        WHERE
+                            timestamp > ?
+                            AND
+                            timestamp < ?
+                        GROUP BY
+                            user_id,
+                            client_type
+                        HAVING
+                            max(timestamp) - min(timestamp) > ?
+                    ) AS temp
+                GROUP BY
+                    client_type
+                ;
+            """
+
+            # We initialise all the client types to zero, so we get an explicit
+            # zero if they don't appear in the query results
+            results = {"ios": 0, "android": 0, "web": 0, "electron": 0}
+            txn.execute(
+                sql,
+                (
+                    sixty_days_ago_in_secs * 1000,
+                    one_day_from_now_in_secs * 1000,
+                    thirty_days_in_secs * 1000,
+                ),
+            )
+
+            for row in txn:
+                if row[0] == "unknown":
+                    continue
+                results[row[0]] = row[1]
+
+            # This is the 'all users' count.
+            sql = """
+                SELECT COUNT(*) FROM (
+                    SELECT
+                        1
+                    FROM
+                        user_daily_visits
+                    WHERE
+                        timestamp > ?
+                        AND
+                        timestamp < ?
+                    GROUP BY
+                        user_id
+                    HAVING
+                        max(timestamp) - min(timestamp) > ?
+                ) AS r30_users
+            """
+
+            txn.execute(
+                sql,
+                (
+                    sixty_days_ago_in_secs * 1000,
+                    one_day_from_now_in_secs * 1000,
+                    thirty_days_in_secs * 1000,
+                ),
+            )
+            row = txn.fetchone()
+            if row is None:
+                results["all"] = 0
+            else:
+                results["all"] = row[0]
+
+            return results
+
+        return await self.db_pool.runInteraction(
+            "count_r30v2_users", _count_r30v2_users
+        )
+
     def _get_start_of_day(self):
         """
         Returns millisecond unixtime for start of UTC day.