/// <summary>
/// This method will return the instance of a server based on the provided user and channel id.
/// </summary>
/// <param name="userId">The id of the target user</param>
/// <param name="channelId">the id of the target channel</param>
/// <returns>An instance of a Server or null</returns>
private Either <Server, Error> GetServer(long userId, int channelId)
{
try
{
var server = _burstChatContext
.Servers
.Include(s => s.Channels)
.Include(s => s.Subscriptions)
.AsQueryable()
.FirstOrDefault(s => s.Subscriptions.Any(sub => sub.UserId == userId) &&
s.Channels.Any(c => c.Id == channelId));
if (server is null)
{
return(new Failure <Server, Error>(ChannelErrors.ChannelNotFound()));
}
else
{
return(new Success <Server, Error>(server));
}
}
catch (Exception e)
{
_logger.LogError(e.Message);
return(new Failure <Server, Error>(SystemErrors.Exception()));
}
}
/// <summary>
/// This method will return the data of a channel based on the provided channel id.
/// </summary>
/// <param name="userId">The id of the requesting user</param>
/// <param name="channelId">The id of the target channel</param>
/// <returns>An either monad</returns>
public Either <Channel, Error> Get(long userId, int channelId)
{
try
{
return(GetServer(userId, channelId).Bind <Channel>(_ =>
{
var channel = _burstChatContext
.Channels
.FirstOrDefault(c => c.Id == channelId);
if (channel is not null && channel.IsPublic)
{
return new Success <Channel, Error>(channel);
}
else
{
return new Failure <Channel, Error>(ChannelErrors.ChannelNotFound());
}
}));
