public override async Task <Empty> SubscribeToUsersUpdates(ConnectionsUpdatesRequest request,
ServerCallContext context)
{
_logger.LogInformation(
"Begin grpc call from method {Method} to subscribe to users 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 userSubscription = new UserSubscription(userId);
await _subscriptionService.SubscribeAsync(request.ConnectionId, userSubscription);
var relationshipSubscription = new ConnectionSubscription(request.UserId, userId);
await _subscriptionService.SubscribeAsync(request.ConnectionId, relationshipSubscription);
}
return(new Empty());
}
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 SubscribeToUsersStatusUpdatesAsync(string userId, string connectionId, params string[] usersIds)
{
await GrpcCallerService.CallService(_urls.GrpcNotifications, async channel =>
{
var client = new NotificationsGrpc.NotificationsGrpcClient(channel);
var request = new ConnectionsUpdatesRequest
{
UserId = userId,
ConnectionId = connectionId
};
request.UsersIds.AddRange(usersIds);
await client.SubscribeToUsersStatusUpdatesAsync(request);
});
}