add preferred language (#109)

* add explicit warning for zero/invalid duration media items

* set dateadded on plex media versions

* add media stream table

* save local media streams to db

* save plex media streams to db

* add preferred language settings (no validation)

* use preferred language if possible

* code cleanup

* proper language code validation

* force scan of all libraries to pull in media streams

ErsatzTV.Application/Channels/ChannelViewModel.cs

@@ -8,5 +8,6 @@ namespace ErsatzTV.Application.Channels
         string Name,
         int FFmpegProfileId,
         string Logo,
+        string PreferredLanguageCode,
         StreamingMode StreamingMode);
 }

ErsatzTV.Application/Channels/Commands/CreateChannel.cs

@@ -11,5 +11,6 @@ namespace ErsatzTV.Application.Channels.Commands
         string Number,
         int FFmpegProfileId,
         string Logo,
+        string PreferredLanguageCode,
         StreamingMode StreamingMode) : IRequest<Either<BaseError, ChannelViewModel>>;
 }

ErsatzTV.Application/Channels/Commands/CreateChannelHandler.cs

@@ -1,5 +1,7 @@
 using System;
 using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
 using System.Text.RegularExpressions;
 using System.Threading;
 using System.Threading.Tasks;
@@ -9,6 +11,7 @@ using ErsatzTV.Core.Interfaces.Repositories;
 using LanguageExt;
 using MediatR;
 using static ErsatzTV.Application.Channels.Mapper;
+using static LanguageExt.Prelude;
 
 namespace ErsatzTV.Application.Channels.Commands
 {
@@ -36,9 +39,10 @@ namespace ErsatzTV.Application.Channels.Commands
             _channelRepository.Add(c).Map(ProjectToViewModel);
 
         private async Task<Validation<BaseError, Channel>> Validate(CreateChannel request) =>
-            (ValidateName(request), await ValidateNumber(request), await FFmpegProfileMustExist(request))
+            (ValidateName(request), await ValidateNumber(request), await FFmpegProfileMustExist(request),
+                ValidatePreferredLanguage(request))
             .Apply(
-                (name, number, ffmpegProfileId) =>
+                (name, number, ffmpegProfileId, preferredLanguageCode) =>
                 {
                     var artwork = new List<Artwork>();
                     if (!string.IsNullOrWhiteSpace(request.Logo))
@@ -59,7 +63,8 @@ namespace ErsatzTV.Application.Channels.Commands
                         Number = number,
                         FFmpegProfileId = ffmpegProfileId,
                         StreamingMode = request.StreamingMode,
-                        Artwork = artwork
+                        Artwork = artwork,
+                        PreferredLanguageCode = preferredLanguageCode
                     };
                 });
 
@@ -67,6 +72,14 @@ namespace ErsatzTV.Application.Channels.Commands
             createChannel.NotEmpty(c => c.Name)
                 .Bind(_ => createChannel.NotLongerThan(50)(c => c.Name));
 
+        private Validation<BaseError, string> ValidatePreferredLanguage(CreateChannel createChannel) =>
+            Optional(createChannel.PreferredLanguageCode)
+                .Filter(
+                    lc => string.IsNullOrWhiteSpace(lc) || CultureInfo.GetCultures(CultureTypes.NeutralCultures).Any(
+                        ci => string.Equals(ci.ThreeLetterISOLanguageName, lc, StringComparison.OrdinalIgnoreCase)))
+                .ToValidation<BaseError>("Preferred language code is invalid");
+
+
         private async Task<Validation<BaseError, string>> ValidateNumber(CreateChannel createChannel)
         {
             Option<Channel> maybeExistingChannel = await _channelRepository.GetByNumber(createChannel.Number);

ErsatzTV.Application/Channels/Commands/UpdateChannel.cs

@@ -12,5 +12,6 @@ namespace ErsatzTV.Application.Channels.Commands
         string Number,
         int FFmpegProfileId,
         string Logo,
+        string PreferredLanguageCode,
         StreamingMode StreamingMode) : IRequest<Either<BaseError, ChannelViewModel>>;
 }

ErsatzTV.Application/Channels/Commands/UpdateChannelHandler.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Globalization;
 using System.Linq;
 using System.Text.RegularExpressions;
 using System.Threading;
@@ -32,6 +33,7 @@ namespace ErsatzTV.Application.Channels.Commands
             c.Name = update.Name;
             c.Number = update.Number;
             c.FFmpegProfileId = update.FFmpegProfileId;
+            c.PreferredLanguageCode = update.PreferredLanguageCode;
 
             if (!string.IsNullOrWhiteSpace(update.Logo))
             {
@@ -65,8 +67,9 @@ namespace ErsatzTV.Application.Channels.Commands
         }
 
         private async Task<Validation<BaseError, Channel>> Validate(UpdateChannel request) =>
-            (await ChannelMustExist(request), ValidateName(request), await ValidateNumber(request))
-            .Apply((channelToUpdate, _, _) => channelToUpdate);
+            (await ChannelMustExist(request), ValidateName(request), await ValidateNumber(request),
+                ValidatePreferredLanguage(request))
+            .Apply((channelToUpdate, _, _, _) => channelToUpdate);
 
         private Task<Validation<BaseError, Channel>> ChannelMustExist(UpdateChannel updateChannel) =>
             _channelRepository.Get(updateChannel.ChannelId)
@@ -92,5 +95,12 @@ namespace ErsatzTV.Application.Channels.Commands
 
             return BaseError.New("Channel number must be unique");
         }
+
+        private Validation<BaseError, string> ValidatePreferredLanguage(UpdateChannel updateChannel) =>
+            Optional(updateChannel.PreferredLanguageCode)
+                .Filter(
+                    lc => string.IsNullOrWhiteSpace(lc) || CultureInfo.GetCultures(CultureTypes.NeutralCultures).Any(
+                        ci => string.Equals(ci.ThreeLetterISOLanguageName, lc, StringComparison.OrdinalIgnoreCase)))
+                .ToValidation<BaseError>("Preferred language code is invalid");
     }
 }

ErsatzTV.Application/Channels/Mapper.cs

@@ -13,6 +13,7 @@ namespace ErsatzTV.Application.Channels
                 channel.Name,
                 channel.FFmpegProfileId,
                 GetLogo(channel),
+                channel.PreferredLanguageCode,
                 channel.StreamingMode);
 
         private static string GetLogo(Channel channel) =>