allow two decimals in channel numbers (#724)

CHANGELOG.md

@@ -27,6 +27,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
     - This mode is only used when the `Reset Playout` button is clicked on the Playouts page
 - Use ffmpeg to resize images; this should help reduce ErsatzTV's memory use
 - Use ffprobe to check for animated logos and watermarks; this should help reduce ErsatzTV's memory use
+- Allow two decimals in channel numbers (e.g. `5.73`)
 
 ## [0.4.5-alpha] - 2022-03-29
 ### Fixed

ErsatzTV.Application/Channels/Commands/CreateChannelHandler.cs

@@ -119,7 +119,7 @@ public class CreateChannelHandler : IRequestHandler<CreateChannel, Either<BaseEr
                     return createChannel.Number;
                 }
 
-                return BaseError.New("Invalid channel number; one decimal is allowed for subchannels");
+                return BaseError.New("Invalid channel number; two decimals are allowed for subchannels");
             });
     }
 

ErsatzTV.Application/Channels/Commands/UpdateChannelHandler.cs

@@ -102,7 +102,7 @@ public class UpdateChannelHandler : IRequestHandler<UpdateChannel, Either<BaseEr
                 return updateChannel.Number;
             }
 
-            return BaseError.New("Invalid channel number; one decimal is allowed for subchannels");
+            return BaseError.New("Invalid channel number; two decimals are allowed for subchannels");
         }
 
         return BaseError.New("Channel number must be unique");

ErsatzTV.Core/Domain/Channel.cs

@@ -4,7 +4,7 @@ namespace ErsatzTV.Core.Domain;
 
 public class Channel
 {
-    public static string NumberValidator = @"^[0-9]+(\.[0-9])?$";
+    public static string NumberValidator = @"^[0-9]+(\.[0-9]{1,2})?$";
 
     public Channel(Guid uniqueId) => UniqueId = uniqueId;
     public int Id { get; set; }

ErsatzTV/Validators/ChannelEditViewModelValidator.cs

@@ -10,7 +10,7 @@ public class ChannelEditViewModelValidator : AbstractValidator<ChannelEditViewMo
     public ChannelEditViewModelValidator()
     {
         RuleFor(x => x.Number).Matches(Channel.NumberValidator)
-            .WithMessage("Invalid channel number; one decimal is allowed for subchannels");
+            .WithMessage("Invalid channel number; two decimals are allowed for subchannels");
 
         RuleFor(x => x.Name).NotEmpty();
         RuleFor(x => x.Group).NotEmpty();