public Task <Channel> FindByNameAsync(string name)
{
var foundChannel = _context
.Channels
.FirstOrDefault(c => c.Name == name);
if (foundChannel == null)
{
return(Task.FromResult <Channel>(null));
}
var result = new Channel()
{
Name = foundChannel.Name,
Version = foundChannel.Version,
Members = foundChannel.Users.Select(u => new UserId(u.UserId)).ToList(),
Messages = foundChannel.Messages
.Select(m => new ChannelMessage
{
From = new UserId(m.UserId),
Text = m.Text,
Timestamp = m.TimeStamp
}).ToList()
};
return(Task.FromResult(result));
}
public Task CreateAsync(Channel channel)
{
_context.Channels.Add(new Model.Channel
{
Name = channel.Name,
Type = 0,
Version = 0
});
_context.SaveChanges();
return(Task.FromResult(0));
}
public Task RemoveUserAsync(Channel channel, UserId user)
{
var foundChannel = _context
.Channels
.FirstOrDefault(c => c.Name == channel.Name);
if (foundChannel != null)
{
var foundChannelUser = foundChannel
.Users
.FirstOrDefault(u => u.UserId == user.Id);
foundChannel.Users.Remove(foundChannelUser);
_context.SaveChanges();
}
return(Task.FromResult(0));
}
public Task AddUserAsync(Channel channel, UserId user)
{
var foundChannel = _context
.Channels
.FirstOrDefault(c => c.Name == channel.Name);
if (foundChannel != null)
{
foundChannel.Users.Add(new ChannelUser
{
ChannelId = foundChannel.Id,
UserId = user.Id
});
_context.SaveChanges();
}
return(Task.FromResult(0));
}
public Task AddMessageAsync(Channel channel, ChannelMessage channelMessage)
{
var foundChannel = _context
.Channels
.FirstOrDefault(c => c.Name == channel.Name);
if (foundChannel != null)
{
foundChannel.Version++;
foundChannel.Messages.Add(new Model.ChannelMessage
{
ChannelId = foundChannel.Id,
UserId = channelMessage.From.Id,
Text = channelMessage.Text,
TimeStamp = channelMessage.Timestamp,
Version = foundChannel.Version
});
_context.SaveChanges();
}
return(Task.FromResult(0));
}
