From b839273ce0bcb02fe71630f17bde070ddcf95716 Mon Sep 17 00:00:00 2001
From: Nicolas Werner <n.werner@famedly.com>
Date: Thu, 12 Sep 2024 14:36:47 +0200
Subject: [PATCH] fix: also lazy load members for archive

This should speed up loading the archived rooms. One of the reasons it
was so slow, is because we were loading all room members!

Additionally this may work around a bug in Synapse, where rooms stuck in
their partial state may block sync indefinitely.

Relates to https://github.com/famedly/product-management/issues/2250
---
 lib/fake_matrix_api.dart |  2 +-
 lib/src/client.dart      | 11 ++++++++++-
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/lib/fake_matrix_api.dart b/lib/fake_matrix_api.dart
index cb89faad..c78d1aae 100644
--- a/lib/fake_matrix_api.dart
+++ b/lib/fake_matrix_api.dart
@@ -1972,7 +1972,7 @@ class FakeMatrixApi extends BaseClient {
               ]
             }
           },
-      '/client/v3/sync?filter=%7B%22room%22%3A%7B%22include_leave%22%3Atrue%2C%22timeline%22%3A%7B%22limit%22%3A10%7D%7D%7D&timeout=0':
+      '/client/v3/sync?filter=%7B%22room%22%3A%7B%22include_leave%22%3Atrue%2C%22state%22%3A%7B%22lazy_load_members%22%3Atrue%7D%2C%22timeline%22%3A%7B%22limit%22%3A10%7D%7D%7D&timeout=0':
           (var req) => archiveSyncResponse,
       '/client/v3/sync?filter=1234&timeout=0': (var req) => syncResponse,
       '/client/v3/sync?filter=1234&since=1234&full_state=false&set_presence=unavailable&timeout=15':
diff --git a/lib/src/client.dart b/lib/src/client.dart
index 77fbb5f5..d842fe5d 100644
--- a/lib/src/client.dart
+++ b/lib/src/client.dart
@@ -1109,8 +1109,17 @@ class Client extends MatrixApi {
   /// [ArchivedRoom] objects containing the [Room] and the associated [Timeline].
   Future<List<ArchivedRoom>> loadArchiveWithTimeline() async {
     _archivedRooms.clear();
+
+    final filter = jsonEncode(Filter(
+      room: RoomFilter(
+        state: StateFilter(lazyLoadMembers: true),
+        includeLeave: true,
+        timeline: StateFilter(limit: 10),
+      ),
+    ).toJson());
+
     final syncResp = await sync(
-      filter: '{"room":{"include_leave":true,"timeline":{"limit":10}}}',
+      filter: filter,
       timeout: _archiveCacheBusterTimeout,
       setPresence: syncPresence,
     );