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namespace LibMatrix.HomeserverEmulator.Services;
public class PaginationTokenResolverService(ILogger<PaginationTokenResolverService> logger, RoomStore roomStore, UserStore userStore) {
public async Task<long?> ResolveTokenToTimestamp(string token) {
logger.LogTrace("ResolveTokenToTimestamp({token})", token);
if (token.StartsWith('$')) {
//we have an event ID
foreach (var room in roomStore._rooms) {
var evt = await ResolveTokenToEvent(token, room);
if (evt is not null) return evt.OriginServerTs;
}
// event not found
throw new NotImplementedException();
}
else {
// we have a sync token
foreach (var user in userStore._users) {
foreach (var (_, session) in user.AccessTokens) {
if (!session.SyncStates.TryGetValue(token, out var syncState)) continue;
long? maxTs = 0;
foreach (var room in syncState.RoomPositions) {
var roomObj = roomStore.GetRoomById(room.Key);
if (roomObj is null)
continue;
var ts = roomObj.Timeline.Last().OriginServerTs;
if (ts > maxTs) maxTs = ts;
}
return maxTs;
}
}
throw new NotImplementedException();
}
}
public async Task<StateEventResponse?> ResolveTokenToEvent(string token, RoomStore.Room room) {
if (token.StartsWith('$')) {
//we have an event ID
logger.LogTrace("ResolveTokenToEvent(EventId({token}), Room({room})): searching for event...", token, room.RoomId);
var evt = room.Timeline.SingleOrDefault(x => x.EventId == token);
if (evt is not null) return evt;
logger.LogTrace("ResolveTokenToEvent({token}, Room({room})): event not in requested room...", token, room.RoomId);
return null;
}
else {
// we have a sync token
logger.LogTrace("ResolveTokenToEvent(SyncToken({token}), Room({room}))", token, room.RoomId);
throw new NotImplementedException();
}
}
}
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