ersatztv/ErsatzTV.Application/Channels/Mapper.cs

using ErsatzTV.Application.Artworks;
using ErsatzTV.Core.Api.Channels;
using ErsatzTV.Core.Domain;

namespace ErsatzTV.Application.Channels;

internal static class Mapper
{
    internal static ChannelViewModel ProjectToViewModel(Channel channel, int playoutCount) =>
        new(
            channel.Id,
            channel.Number,
            channel.Name,
            channel.Group,
            channel.Categories,
            channel.FFmpegProfileId,
            channel.SlugSeconds,
            GetLogo(channel),
            channel.StreamSelectorMode,
            channel.StreamSelector,
            channel.PreferredAudioLanguageCode,
            channel.PreferredAudioTitle,
            channel.PlayoutSource,
            channel.PlayoutMode,
            channel.MirrorSourceChannelId,
            channel.PlayoutOffset,
            channel.StreamingMode,
            channel.WatermarkId,
            channel.FallbackFillerId,
            playoutCount,
            channel.PreferredSubtitleLanguageCode,
            channel.SubtitleMode,
            channel.MusicVideoCreditsMode,
            channel.MusicVideoCreditsTemplate,
            channel.SongVideoMode,
            channel.TranscodeMode,
            channel.IdleBehavior,
            channel.IsEnabled,
            channel.ShowInEpg);

    internal static ChannelDetailResponseModel ProjectToDetailResponseModel(Channel channel, int playoutCount)
    {
        ArtworkContentTypeModel logo = GetLogo(channel);
        return new ChannelDetailResponseModel(
            channel.Id,
            channel.Number,
            channel.Name,
            channel.Group,
            channel.Categories,
            channel.FFmpegProfileId,
            channel.SlugSeconds,
            new ChannelLogoResponseModel(logo.Path, logo.ContentType),
            channel.StreamSelectorMode,
            channel.StreamSelector,
            channel.PreferredAudioLanguageCode,
            channel.PreferredAudioTitle,
            channel.PlayoutSource,
            channel.PlayoutMode,
            channel.MirrorSourceChannelId,
            channel.PlayoutOffset,
            channel.StreamingMode,
            channel.WatermarkId,
            channel.FallbackFillerId,
            playoutCount,
            channel.PreferredSubtitleLanguageCode,
            channel.SubtitleMode,
            channel.MusicVideoCreditsMode,
            channel.MusicVideoCreditsTemplate,
            channel.SongVideoMode,
            channel.TranscodeMode,
            channel.IdleBehavior,
            channel.IsEnabled,
            channel.ShowInEpg);
    }

    internal static ChannelResponseModel ProjectToResponseModel(Channel channel) =>
        new(
            channel.Id,
            channel.Number,
            channel.SortNumber,
            channel.Name,
            channel.Group,
            channel.Categories,
            channel.FFmpegProfile.Name,
            channel.PreferredAudioLanguageCode,
            GetStreamingMode(channel),
            channel.IsEnabled,
            channel.ShowInEpg);

    internal static ResolutionViewModel ProjectToViewModel(Resolution resolution) =>
        new(resolution.Height, resolution.Width);

    internal static ChannelStreamingSpecsViewModel ProjectToSpecsViewModel(Channel channel) =>
        new(
            channel.FFmpegProfile.Resolution.Height,
            channel.FFmpegProfile.Resolution.Width,
            (int)((channel.FFmpegProfile.VideoBitrate * 1000 + channel.FFmpegProfile.AudioBitrate * 1000) * 1.2),
            channel.FFmpegProfile.VideoFormat,
            channel.FFmpegProfile.VideoProfile,
            channel.FFmpegProfile.AudioFormat);

    private static ArtworkContentTypeModel GetLogo(Channel channel)
    {
        Option<Artwork> maybeArtwork = channel.Artwork
            .Where(a => a.ArtworkKind == ArtworkKind.Logo)
            .HeadOrNone();

        foreach (Artwork artwork in maybeArtwork)
        {
            return artwork.IsExternalUrl()
                ? new ArtworkContentTypeModel(artwork.Path, string.Empty)
                : new ArtworkContentTypeModel($"iptv/logos/{artwork.Path}", artwork.OriginalContentType);
        }

        return ArtworkContentTypeModel.None;
    }

    private static string GetStreamingMode(Channel channel) =>
        channel.StreamingMode switch
        {
            StreamingMode.TransportStream => "MPEG-TS (Legacy)",
            StreamingMode.TransportStreamHybrid => "MPEG-TS",
            StreamingMode.HttpLiveStreamingDirect => "HLS Direct",
            StreamingMode.HttpLiveStreamingSegmenter => "HLS Segmenter",
            _ => throw new ArgumentOutOfRangeException(nameof(channel))
        };
}