Refactoring and cleanups

A few non-functional changes:

* A bunch of docstrings to document types
* Split `EventsStore._persist_events_txn` up a bit. Hopefully it's a bit more
  readable.
* Rephrase `EventFederationStore._update_min_depth_for_room_txn` to avoid
  mind-bending conditional.
* Rephrase rejected/outlier conditional in `_update_outliers_txn` to avoid
  mind-bending conditional.

1 files changed, 12 insertions, 12 deletions

diff --git a/synapse/storage/event_federation.py b/synapse/storage/event_federation.py
index 256e50dc20..0d97de2fe7 100644
--- a/synapse/storage/event_federation.py
+++ b/synapse/storage/event_federation.py
@@ -201,19 +201,19 @@ class EventFederationStore(SQLBaseStore):
     def _update_min_depth_for_room_txn(self, txn, room_id, depth):
         min_depth = self._get_min_depth_interaction(txn, room_id)
 
-        do_insert = depth < min_depth if min_depth else True
+        if min_depth and depth >= min_depth:
+            return
 
-        if do_insert:
-            self._simple_upsert_txn(
-                txn,
-                table="room_depth",
-                keyvalues={
-                    "room_id": room_id,
-                },
-                values={
-                    "min_depth": depth,
-                },
-            )
+        self._simple_upsert_txn(
+            txn,
+            table="room_depth",
+            keyvalues={
+                "room_id": room_id,
+            },
+            values={
+                "min_depth": depth,
+            },
+        )
 
     def _handle_mult_prev_events(self, txn, events):
         """