public override async Task <Empty> SubscribeToUsersStatusUpdates(ConnectionsUpdatesRequest request,
ServerCallContext context)
{
_logger.LogInformation(
"Begin grpc call from method {Method} to subscribe to users status updates {UsersIds} with connectionId {ConnectionId}",
context.Method,
string.Join(',', request.UsersIds),
request.ConnectionId);
var verifiedConnection =
await _userConnectionService.VerifyConnectionAsync(request.UserId, request.ConnectionId);
if (!verifiedConnection)
{
context.Status = new Status(StatusCode.InvalidArgument, "Invalid connection id.");
return(new Empty());
}
foreach (var userId in request.UsersIds)
{
var statusSubscription = new UserStatusSubscription(userId);
await _subscriptionService.SubscribeAsync(request.ConnectionId, statusSubscription);
var isOnline = await _userConnectionService.HasConnectionsAsync(userId);
var method = UserStatusUpdatedMethod.WithArgs(userId,
isOnline ? UserStatusUpdatedMethod.UserStatus.Online : UserStatusUpdatedMethod.UserStatus.Offline);
await _publisherService.PublishAsync(request.ConnectionId, method);
}
return(new Empty());
}
public async Task Handle(ConnectionUpdatedIntegrationEvent @event)
{
var connectionSubscription = new ConnectionSubscription(@event.UserId, @event.OtherId);
var connectionMethod = ConnectionUpdatedMethod.WithArgs(@event.OtherId, @event.Notes, (int)@event.Relationship);
await _publisherService.PublishAsync(connectionSubscription, connectionMethod);
var statusSubscription = new UserStatusSubscription(@event.OtherId);
var connections = await _connectionService.GetConnectionsAsync(@event.UserId);
foreach (var connection in connections)
{
if (@event.Relationship == ConnectionUpdatedIntegrationEvent.RelationshipEnum.Friend)
{
await _subscriptionService.SubscribeAsync(connection, statusSubscription);
var isOnline = await _connectionService.HasConnectionsAsync(@event.OtherId);
var statusMethod = UserStatusUpdatedMethod.WithArgs(@event.OtherId, isOnline ? UserStatus.Online : UserStatus.Offline);
await _publisherService.PublishAsync(connection, statusMethod);
}
else
{
await _subscriptionService.UnsubscribeAsync(connection, statusSubscription);
var statusMethod = UserStatusUpdatedMethod.WithArgs(@event.OtherId, UserStatus.Unknown);
await _publisherService.PublishAsync(connection, statusMethod);
}
}
}
public async Task RemoveConnectionAsync(string userId, string connectionId)
{
await _database.KeyDeleteAsync(GetConnectionKey(connectionId));
await _database.SetRemoveAsync(GetUserKey(userId), connectionId);
if (!await HasConnectionsAsync(userId))
{
var subscription = new UserStatusSubscription(userId);
var method = UserStatusUpdatedMethod.WithArgs(userId, UserStatus.Offline);
await _publisherService.PublishAsync(subscription, method);
}
}
public async Task AddConnectionAsync(string userId, string connectionId)
{
await _database.StringSetAsync(GetConnectionKey(connectionId), userId);
await _database.SetAddAsync(GetUserKey(userId), connectionId);
var connectionsCount = await _database.SetLengthAsync(GetUserKey(userId));
if (connectionsCount == 1)
{
var subscription = new UserStatusSubscription(userId);
var method = UserStatusUpdatedMethod.WithArgs(userId, UserStatus.Online);
await _publisherService.PublishAsync(subscription, method);
}
}