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 Validation<BaseError, int> ValidateNumber(CreateChannel createChannel) =>
-            createChannel.AtLeast(1)(c => c.Number);
+        private async Task<Validation<BaseError, string>> ValidateNumber(CreateChannel createChannel)
+        {
+            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)
         {
         }
     }