From c29e2c630624beb0b5557aa0f7ccdcedbe62def1 Mon Sep 17 00:00:00 2001
From: David Robertson <davidr@element.io>
Date: Tue, 29 Nov 2022 17:48:48 +0000
Subject: Revert "POC delete stale non-e2e devices for users (#14038)" (#14582)

---
 synapse/storage/databases/main/devices.py | 68 +------------------------------
 1 file changed, 1 insertion(+), 67 deletions(-)

(limited to 'synapse/storage/databases/main')

diff --git a/synapse/storage/databases/main/devices.py b/synapse/storage/databases/main/devices.py
index 0378035cff..534f7fc04a 100644
--- a/synapse/storage/databases/main/devices.py
+++ b/synapse/storage/databases/main/devices.py
@@ -1533,71 +1533,6 @@ class DeviceBackgroundUpdateStore(SQLBaseStore):
 
         return rows
 
-    async def check_too_many_devices_for_user(self, user_id: str) -> Collection[str]:
-        """Check if the user has a lot of devices, and if so return the set of
-        devices we can prune.
-
-        This does *not* return hidden devices or devices with E2E keys.
-        """
-
-        num_devices = await self.db_pool.simple_select_one_onecol(
-            table="devices",
-            keyvalues={"user_id": user_id, "hidden": False},
-            retcol="COALESCE(COUNT(*), 0)",
-            desc="count_devices",
-        )
-
-        # We let users have up to ten devices without pruning.
-        if num_devices <= 10:
-            return ()
-
-        # We prune everything older than N days.
-        max_last_seen = self._clock.time_msec() - 14 * 24 * 60 * 60 * 1000
-
-        if num_devices > 50:
-            # If the user has more than 50 devices, then we chose a last seen
-            # that ensures we keep at most 50 devices.
-            sql = """
-                SELECT last_seen FROM devices
-                LEFT JOIN e2e_device_keys_json USING (user_id, device_id)
-                WHERE
-                    user_id = ?
-                    AND NOT hidden
-                    AND last_seen IS NOT NULL
-                    AND key_json IS NULL
-                ORDER BY last_seen DESC
-                LIMIT 1
-                OFFSET 50
-            """
-
-            rows = await self.db_pool.execute(
-                "check_too_many_devices_for_user_last_seen", None, sql, (user_id,)
-            )
-            if rows:
-                max_last_seen = max(rows[0][0], max_last_seen)
-
-        # Now fetch the devices to delete.
-        sql = """
-            SELECT DISTINCT device_id FROM devices
-            LEFT JOIN e2e_device_keys_json USING (user_id, device_id)
-            WHERE
-                user_id = ?
-                AND NOT hidden
-                AND last_seen < ?
-                AND key_json IS NULL
-        """
-
-        def check_too_many_devices_for_user_txn(
-            txn: LoggingTransaction,
-        ) -> Collection[str]:
-            txn.execute(sql, (user_id, max_last_seen))
-            return {device_id for device_id, in txn}
-
-        return await self.db_pool.runInteraction(
-            "check_too_many_devices_for_user",
-            check_too_many_devices_for_user_txn,
-        )
-
 
 class DeviceStore(DeviceWorkerStore, DeviceBackgroundUpdateStore):
     # Because we have write access, this will be a StreamIdGenerator
@@ -1656,7 +1591,6 @@ class DeviceStore(DeviceWorkerStore, DeviceBackgroundUpdateStore):
                 values={},
                 insertion_values={
                     "display_name": initial_device_display_name,
-                    "last_seen": self._clock.time_msec(),
                     "hidden": False,
                 },
                 desc="store_device",
@@ -1702,7 +1636,7 @@ class DeviceStore(DeviceWorkerStore, DeviceBackgroundUpdateStore):
             )
             raise StoreError(500, "Problem storing device.")
 
-    async def delete_devices(self, user_id: str, device_ids: Collection[str]) -> None:
+    async def delete_devices(self, user_id: str, device_ids: List[str]) -> None:
         """Deletes several devices.
 
         Args:
-- 
cgit 1.4.1