add subchannel support (#53)

ErsatzTV.Application/Channels/ChannelViewModel.cs

@@ -4,7 +4,7 @@ namespace ErsatzTV.Application.Channels
 {
     public record ChannelViewModel(
         int Id,
-        int Number,
+        string Number,
         string Name,
         int FFmpegProfileId,
         string Logo,

ErsatzTV.Application/Channels/Commands/CreateChannel.cs

@@ -8,7 +8,7 @@ namespace ErsatzTV.Application.Channels.Commands
     public record CreateChannel
     (
         string Name,
-        int Number,
+        string Number,
         int FFmpegProfileId,
         string Logo,
         StreamingMode StreamingMode) : IRequest<Either<BaseError, ChannelViewModel>>;

ErsatzTV.Application/Channels/Commands/CreateChannelHandler.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Text.RegularExpressions;
 using System.Threading;
 using System.Threading.Tasks;
 using ErsatzTV.Core;
@@ -35,7 +36,7 @@ namespace ErsatzTV.Application.Channels.Commands
             _channelRepository.Add(c).Map(ProjectToViewModel);
 
         private async Task<Validation<BaseError, Channel>> Validate(CreateChannel request) =>
-            (ValidateName(request), ValidateNumber(request), await FFmpegProfileMustExist(request))
+            (ValidateName(request), await ValidateNumber(request), await FFmpegProfileMustExist(request))
             .Apply(
                 (name, number, ffmpegProfileId) =>
                 {
@@ -66,9 +67,21 @@ namespace ErsatzTV.Application.Channels.Commands
             createChannel.NotEmpty(c => c.Name)
                 .Bind(_ => createChannel.NotLongerThan(50)(c => c.Name));
 
-        // TODO: validate number does not exist?
+        private async Task<Validation<BaseError, string>> ValidateNumber(CreateChannel createChannel)
-        private Validation<BaseError, int> ValidateNumber(CreateChannel createChannel) =>
+        {
-            createChannel.AtLeast(1)(c => c.Number);
+            Option<Channel> maybeExistingChannel = await _channelRepository.GetByNumber(createChannel.Number);
+            return maybeExistingChannel.Match<Validation<BaseError, string>>(
+                _ => BaseError.New("Channel number must be unique"),
+                () =>
+                {
+                    if (Regex.IsMatch(createChannel.Number, @"^[0-9]+(\.[0-9])?$"))
+                    {
+                        return createChannel.Number;
+                    }
+
+                    return BaseError.New("Invalid channel number; one decimal is allowed for subchannels");
+                });
+        }
 
         private async Task<Validation<BaseError, int>> FFmpegProfileMustExist(CreateChannel createChannel) =>
             (await _ffmpegProfileRepository.Get(createChannel.FFmpegProfileId))

ErsatzTV.Application/Channels/Commands/UpdateChannel.cs

@@ -9,7 +9,7 @@ namespace ErsatzTV.Application.Channels.Commands
     (
         int ChannelId,
         string Name,
-        int Number,
+        string Number,
         int FFmpegProfileId,
         string Logo,
         StreamingMode StreamingMode) : IRequest<Either<BaseError, ChannelViewModel>>;

ErsatzTV.Application/Channels/Commands/UpdateChannelHandler.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Text.RegularExpressions;
 using System.Threading;
 using System.Threading.Tasks;
 using ErsatzTV.Core;
@@ -75,13 +76,18 @@ namespace ErsatzTV.Application.Channels.Commands
             updateChannel.NotEmpty(c => c.Name)
                 .Bind(_ => updateChannel.NotLongerThan(50)(c => c.Name));
 
-        private async Task<Validation<BaseError, int>> ValidateNumber(UpdateChannel updateChannel)
+        private async Task<Validation<BaseError, string>> ValidateNumber(UpdateChannel updateChannel)
         {
             Option<Channel> match = await _channelRepository.GetByNumber(updateChannel.Number);
             int matchId = match.Map(c => c.Id).IfNone(updateChannel.ChannelId);
             if (matchId == updateChannel.ChannelId)
             {
-                return updateChannel.AtLeast(1)(c => c.Number);
+                if (Regex.IsMatch(updateChannel.Number, @"^[0-9](\.[0-9])?$"))
+                {
+                    return updateChannel.Number;
+                }
+
+                return BaseError.New("Invalid channel number; one decimal is allowed for subchannels");
             }
 
             return BaseError.New("Channel number must be unique");

ErsatzTV.Application/Playouts/PlayoutChannelViewModel.cs

@@ -1,4 +1,4 @@
 namespace ErsatzTV.Application.Playouts
 {
-    public record PlayoutChannelViewModel(int Id, int Number, string Name);
+    public record PlayoutChannelViewModel(int Id, string Number, string Name);
 }

ErsatzTV.Application/Streaming/Queries/FFmpegProcessRequest.cs

@@ -5,5 +5,5 @@ using MediatR;
 
 namespace ErsatzTV.Application.Streaming.Queries
 {
-    public record FFmpegProcessRequest(int ChannelNumber) : IRequest<Either<BaseError, Process>>;
+    public record FFmpegProcessRequest(string ChannelNumber) : IRequest<Either<BaseError, Process>>;
 }

ErsatzTV.Application/Streaming/Queries/GetConcatPlaylistByChannelNumber.cs

@@ -6,5 +6,5 @@ using MediatR;
 namespace ErsatzTV.Application.Streaming.Queries
 {
     public record GetConcatPlaylistByChannelNumber
-        (string Scheme, string Host, int ChannelNumber) : IRequest<Either<BaseError, ConcatPlaylist>>;
+        (string Scheme, string Host, string ChannelNumber) : IRequest<Either<BaseError, ConcatPlaylist>>;
 }

ErsatzTV.Application/Streaming/Queries/GetConcatProcessByChannelNumber.cs

@@ -2,7 +2,7 @@
 {
     public record GetConcatProcessByChannelNumber : FFmpegProcessRequest
     {
-        public GetConcatProcessByChannelNumber(string scheme, string host, int channelNumber) : base(channelNumber)
+        public GetConcatProcessByChannelNumber(string scheme, string host, string channelNumber) : base(channelNumber)
         {
             Scheme = scheme;
             Host = host;

ErsatzTV.Application/Streaming/Queries/GetHlsPlaylistByChannelNumber.cs

@@ -5,5 +5,5 @@ using MediatR;
 namespace ErsatzTV.Application.Streaming.Queries
 {
     public record GetHlsPlaylistByChannelNumber
-        (string Scheme, string Host, int ChannelNumber) : IRequest<Either<BaseError, string>>;
+        (string Scheme, string Host, string ChannelNumber) : IRequest<Either<BaseError, string>>;
 }

ErsatzTV.Application/Streaming/Queries/GetPlayoutItemProcessByChannelNumber.cs

@@ -2,7 +2,7 @@
 {
     public record GetPlayoutItemProcessByChannelNumber : FFmpegProcessRequest
     {
-        public GetPlayoutItemProcessByChannelNumber(int channelNumber) : base(channelNumber)
+        public GetPlayoutItemProcessByChannelNumber(string channelNumber) : base(channelNumber)
         {
         }
     }

ErsatzTV.Core/Domain/Channel.cs

@@ -8,7 +8,7 @@ namespace ErsatzTV.Core.Domain
         public Channel(Guid uniqueId) => UniqueId = uniqueId;
         public int Id { get; set; }
         public Guid UniqueId { get; init; }
-        public int Number { get; set; }
+        public string Number { get; set; }
         public string Name { get; set; }
         public int FFmpegProfileId { get; set; }
         public FFmpegProfile FFmpegProfile { get; set; }

ErsatzTV.Core/FFmpeg/ConcatPlaylist.cs

@@ -1,6 +1,6 @@
 namespace ErsatzTV.Core.FFmpeg
 {
-    public record ConcatPlaylist(string Scheme, string Host, int ChannelNumber)
+    public record ConcatPlaylist(string Scheme, string Host, string ChannelNumber)
     {
         public override string ToString() =>
             $@"ffconcat version 1.0

ErsatzTV.Core/Hdhr/LineupItem.cs

@@ -17,7 +17,7 @@ namespace ErsatzTV.Core.Hdhr
             _channel = channel;
         }
 
-        public string GuideNumber => _channel.Number.ToString();
+        public string GuideNumber => _channel.Number;
         public string GuideName => _channel.Name;
 
         public string URL => _channel.StreamingMode switch

ErsatzTV.Core/Interfaces/Repositories/IChannelRepository.cs

@@ -9,7 +9,7 @@ namespace ErsatzTV.Core.Interfaces.Repositories
     {
         Task<Channel> Add(Channel channel);
         Task<Option<Channel>> Get(int id);
-        Task<Option<Channel>> GetByNumber(int number);
+        Task<Option<Channel>> GetByNumber(string number);
         Task<List<Channel>> GetAll();
         Task<List<Channel>> GetAllForGuide();
         Task Update(Channel channel);

ErsatzTV.Core/Iptv/ChannelGuide.cs

@@ -33,7 +33,7 @@ namespace ErsatzTV.Core.Iptv
             foreach (Channel channel in _channels)
             {
                 xml.WriteStartElement("channel");
-                xml.WriteAttributeString("id", channel.Number.ToString());
+                xml.WriteAttributeString("id", channel.Number);
 
                 xml.WriteStartElement("display-name");
                 xml.WriteAttributeString("lang", "en");
@@ -87,7 +87,7 @@ namespace ErsatzTV.Core.Iptv
                     xml.WriteStartElement("programme");
                     xml.WriteAttributeString("start", start);
                     xml.WriteAttributeString("stop", stop);
-                    xml.WriteAttributeString("channel", channel.Number.ToString());
+                    xml.WriteAttributeString("channel", channel.Number);
 
                     xml.WriteStartElement("title");
                     xml.WriteAttributeString("lang", "en");

ErsatzTV.Infrastructure/Data/DbInitializer.cs

@@ -47,7 +47,7 @@ namespace ErsatzTV.Infrastructure.Data
 
             var defaultChannel = new Channel(Guid.NewGuid())
             {
-                Number = 1,
+                Number = "1",
                 Name = "ErsatzTV",
                 FFmpegProfile = defaultProfile,
                 StreamingMode = StreamingMode.TransportStream

ErsatzTV.Infrastructure/Data/Repositories/ChannelRepository.cs

@@ -29,7 +29,7 @@ namespace ErsatzTV.Infrastructure.Data.Repositories
                 .SingleOrDefaultAsync(c => c.Id == id)
                 .Map(Optional);
 
-        public Task<Option<Channel>> GetByNumber(int number) =>
+        public Task<Option<Channel>> GetByNumber(string number) =>
             _dbContext.Channels
                 .Include(c => c.FFmpegProfile)
                 .ThenInclude(p => p.Resolution)

ErsatzTV.Infrastructure/Migrations/20210309022754_Update_ChannelNumberType.cs

@@ -0,0 +1,27 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+namespace ErsatzTV.Infrastructure.Migrations
+{
+    public partial class Update_ChannelNumberType : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder) =>
+            migrationBuilder.AlterColumn<string>(
+                "Number",
+                "Channel",
+                "TEXT",
+                nullable: true,
+                oldClrType: typeof(int),
+                oldType: "INTEGER");
+
+        protected override void Down(MigrationBuilder migrationBuilder) =>
+            migrationBuilder.AlterColumn<int>(
+                "Number",
+                "Channel",
+                "INTEGER",
+                nullable: false,
+                defaultValue: 0,
+                oldClrType: typeof(string),
+                oldType: "TEXT",
+                oldNullable: true);
+    }
+}

ErsatzTV.Infrastructure/Migrations/TvContextModelSnapshot.cs

@@ -80,8 +80,8 @@ namespace ErsatzTV.Infrastructure.Migrations
                     b.Property<string>("Name")
                         .HasColumnType("TEXT");
 
-                    b.Property<int>("Number")
+                    b.Property<string>("Number")
-                        .HasColumnType("INTEGER");
+                        .HasColumnType("TEXT");
 
                     b.Property<int>("StreamingMode")
                         .HasColumnType("INTEGER");

ErsatzTV/Controllers/InternalController.cs

@@ -22,12 +22,12 @@ namespace ErsatzTV.Controllers
         }
 
         [HttpGet("ffmpeg/concat/{channelNumber}")]
-        public Task<IActionResult> GetConcatPlaylist(int channelNumber) =>
+        public Task<IActionResult> GetConcatPlaylist(string channelNumber) =>
             _mediator.Send(new GetConcatPlaylistByChannelNumber(Request.Scheme, Request.Host.ToString(), channelNumber))
                 .ToActionResult();
 
         [HttpGet("ffmpeg/stream/{channelNumber}")]
-        public Task<IActionResult> GetStream(int channelNumber) =>
+        public Task<IActionResult> GetStream(string channelNumber) =>
             _mediator.Send(new GetPlayoutItemProcessByChannelNumber(channelNumber)).Map(
                 result =>
                     result.Match<IActionResult>(

ErsatzTV/Controllers/IptvController.cs

@@ -37,7 +37,7 @@ namespace ErsatzTV.Controllers
                 .Map<ChannelGuide, IActionResult>(Ok);
 
         [HttpGet("iptv/channel/{channelNumber}.ts")]
-        public Task<IActionResult> GetTransportStreamVideo(int channelNumber) =>
+        public Task<IActionResult> GetTransportStreamVideo(string channelNumber) =>
             _mediator.Send(new GetConcatProcessByChannelNumber(Request.Scheme, Request.Host.ToString(), channelNumber))
                 .Map(
                     result => result.Match<IActionResult>(
@@ -50,7 +50,7 @@ namespace ErsatzTV.Controllers
                         error => BadRequest(error.Value)));
 
         [HttpGet("iptv/channel/{channelNumber}.m3u8")]
-        public Task<IActionResult> GetHttpLiveStreamingVideo(int channelNumber) =>
+        public Task<IActionResult> GetHttpLiveStreamingVideo(string channelNumber) =>
             _mediator.Send(new GetHlsPlaylistByChannelNumber(Request.Scheme, Request.Host.ToString(), channelNumber))
                 .Map(
                     result => result.Match<IActionResult>(

ErsatzTV/Pages/ChannelEditor.razor

@@ -93,8 +93,9 @@
         else
         {
     // TODO: command for new channel
-            int maxNumber = await Mediator.Send(new GetAllChannels()).Map(channels => channels.Max(c => c.Number));
+            int maxNumber = await Mediator.Send(new GetAllChannels())
-            _model.Number = maxNumber + 1;
+                .Map(list => list.Map(c => int.TryParse(c.Number.Split(".").Head(), out int result) ? result : 0).Max());
+            _model.Number = (maxNumber + 1).ToString();
             _model.Name = "New Channel";
             _model.FFmpegProfileId = _ffmpegProfiles.Head().Id;
             _model.StreamingMode = StreamingMode.TransportStream;
@@ -124,7 +125,7 @@
             errorMessage.HeadOrNone().Match(
                 error =>
                 {
-                    Snackbar.Add($"Unexpected error saving channel: {error.Value}");
+                    Snackbar.Add(error.Value, Severity.Error);
                     Logger.LogError("Unexpected error saving channel: {Error}", error.Value);
                 },
                 () => NavigationManager.NavigateTo("/channels"));
@@ -144,7 +145,7 @@
             },
             error =>
             {
-                Snackbar.Add($"Unexpected error saving channel logo: {error.Value}");
+                Snackbar.Add($"Unexpected error saving channel logo: {error.Value}", Severity.Error);
                 Logger.LogError("Unexpected error saving channel logo: {Error}", error.Value);
             });
     }

ErsatzTV/Validators/ChannelEditViewModelValidator.cs

@@ -7,7 +7,9 @@ namespace ErsatzTV.Validators
     {
         public ChannelEditViewModelValidator()
         {
-            RuleFor(x => x.Number).GreaterThan(0);
+            RuleFor(x => x.Number).Matches(@"^[0-9]+(\.[0-9])?$")
+                .WithMessage("Invalid channel number; one decimal is allowed for subchannels");
+
             RuleFor(x => x.Name).NotEmpty();
             RuleFor(x => x.FFmpegProfileId).GreaterThan(0);
         }

ErsatzTV/ViewModels/ChannelEditViewModel.cs

@@ -7,7 +7,7 @@ namespace ErsatzTV.ViewModels
     {
         public int Id { get; set; }
         public string Name { get; set; }
-        public int Number { get; set; }
+        public string Number { get; set; }
         public int FFmpegProfileId { get; set; }
         public string Logo { get; set; }
         public StreamingMode StreamingMode { get; set; }