public async Task <ChannelSuggestionsResponse> Handle(ChannelSuggestionsRequest message)
{
var result = await _youTubeChannelDetailUseCase.Handle(
new YouTubeChannelDetailRequest(
message.ChannelIds
)
);
var channels = result.IdentifiedChannels;
var sourceFilterIsSpecified = !string.IsNullOrWhiteSpace(message.Source);
if (sourceFilterIsSpecified)
{
channels = channels.Where(i => i.Source == message.Source).ToList();
}
var resultChannelIds = channels.Select(c => c.ChannelId).ToList();
// fetch possible suggestions of these channel ids
var userIdIsSpecified = !string.IsNullOrWhiteSpace(message.UserId);
if (userIdIsSpecified)
{
var suggestions = await _suggestionRepository.GetAny(message.UserId, resultChannelIds);
var suggestionChannelIds = suggestions.Select(s => s.Id.ChannelId).ToList();
channels = channels
.Where(c => !suggestionChannelIds.Contains(c.ChannelId))
.ToList();
}
return(new ChannelSuggestionsResponse(channels));
}
public async Task <IdentifySailingChannelResponse> Handle(IdentifySailingChannelRequest message)
{
// guard clause
if (string.IsNullOrWhiteSpace(message.PossibleYouTubeChannelUrl))
{
return(new IdentifySailingChannelResponse(
ChannelIdentificationStatus.NotValid
));
}
// try to identify a channel id from the URL
var channelIdResponse = await _extractYouTubeChannelIdUseCase.Handle(
new ExtractYouTubeChannelIdRequest(message.PossibleYouTubeChannelUrl)
);
// could not identity a channel
if (string.IsNullOrWhiteSpace(channelIdResponse.ChannelId))
{
return(new IdentifySailingChannelResponse(
ChannelIdentificationStatus.NotValid
));
}
// fetch details for youtube channel
var channelDetails = await _youTubeChannelDetailUseCase.Handle(
new YouTubeChannelDetailRequest(
new List <string>()
{
channelIdResponse.ChannelId
}
)
);
if (channelDetails.IdentifiedChannels?.Count == 0)
{
return(new IdentifySailingChannelResponse(
ChannelIdentificationStatus.NotValid
));
}
ChannelIdentificationDto channelDetail = channelDetails.IdentifiedChannels.First();
// we discovered a newly listed channel
if (channelDetail.Source.ToLower() == "yt")
{
// check if channel has been suggested before
var suggestions = await _suggestionRepository.GetAny(
new List <string>() { channelIdResponse.ChannelId }
);
// a suggestion does already exist for this channel
if (suggestions.Count > 0)
{
return(new IdentifySailingChannelResponse(
ChannelIdentificationStatus.AlreadySuggested
));
}
// we found a novel channel at this point!
return(new IdentifySailingChannelResponse(
ChannelIdentificationStatus.Novel,
channelDetail
));
}
// this channel must already be listed
return(new IdentifySailingChannelResponse(
ChannelIdentificationStatus.AlreadyListed,
channelDetail
));
}