public async Task <ICommandResult> HandleAsync(JoinChannelCommand command)
{
command.Validate();
if (command.Invalid)
{
AddNotifications(command);
return(new CommandResult(false, "User could not join this channel", Errors));
}
GetUserByIdQueryResult user = await _userRepository.GetById(command.UserId);
if (user is null)
{
AddNotification(nameof(command.UserId), "User not found");
return(new CommandResult(false, "User not found", Errors));
}
GetChannelByIdQueryResult channel = await _channelRepository.GetById(command.ChannelId);
if (channel is null)
{
AddNotification(nameof(command.ChannelId), "Channel not found");
return(new CommandResult(false, "Channel not found", Errors));
}
bool userAlreadyIsMemeber = await _channelRepository.UserIsMemberOfChannel(user.Id, channel.Id);
if (userAlreadyIsMemeber)
{
AddNotification(nameof(command.ChannelId), "User already is member of this channel");
return(new CommandResult(false, "User could not join this channel", Errors));
}
await _channelRepository.AddUserToChannel(user.Id, channel.Id, false);
return(new CommandResult(true, "User successfully joined the channel", data: null));
}
public async Task <ICommandResult> HandleAsync(UpdateChannelNameCommand command)
{
command.Validate();
if (command.Invalid)
{
AddNotifications(command);
return(new CommandResult(false, "Could not update channel name", Errors));
}
GetChannelByIdQueryResult channel = await _channelRepository.GetById(command.Id);
if (channel is null)
{
AddNotification(nameof(command.Id), "Channel not found");
return(new CommandResult(false, "Could not update channel name", Errors));
}
if (command.AdministratorId != channel.AdministratorId)
{
AddNotification(nameof(command.AdministratorId), "AdministratorId does't match channel administrator id");
return(new CommandResult(false, "User does't have permission to update channel name", Errors));
}
if (channel.Name != command.Name)
{
await _channelRepository.UpdateChannelName(command.Id, command.Name);
}
return(new CommandResult(true, "Name successfully updated", new ChannelOutput
{
Id = command.Id,
Name = command.Name
}));
}
public async Task SendMessage(SendMessageViewModel message)
{
GetChannelByIdQueryResult channel = await _channelRepository.GetById(message.ChannelId);
if (channel is null)
{
return;
}
GetUserByIdQueryResult user = await _userRepository.GetById(message.SenderId);
if (user is null)
{
return;
}
var finalMessage = new Message
{
Content = message.Content,
Date = message.Date,
ChannelId = message.ChannelId,
Sender = new User
{
Id = user.Id,
Username = user.Username
}
};
await Clients.Group(message.ChannelId.ToString()).SendAsync("ReceiveMessage", finalMessage);
}
public async Task <ICommandResult> HandleAsync(DeleteChannelCommand command)
{
command.Validate();
if (command.Invalid)
{
AddNotifications(command);
return(new CommandResult(false, "Could not delete this channel", Errors));
}
GetChannelByIdQueryResult channel = await _channelRepository.GetById(command.ChannelId);
if (channel is null)
{
AddNotification(nameof(command.ChannelId), "Channel not found");
return(new CommandResult(false, "Could not delete this channel", Errors));
}
if (channel.AdministratorId != command.AdministratorId)
{
AddNotification(nameof(command.AdministratorId), "AdministratorId does't match channel administrator id");
return(new CommandResult(false, "User does't have permission to delete this channel", Errors));
}
await _channelRepository.DeleteChannel(channel.Id);
return(new CommandResult(true, "Channel successfully deleted", null, null));
}
