ersatztv/ErsatzTV/Validators/ChannelEditViewModelValidator.cs

using System;
using System.Globalization;
using System.Linq;
using ErsatzTV.Core.Domain;
using ErsatzTV.ViewModels;
using FluentValidation;

namespace ErsatzTV.Validators
{
    public class ChannelEditViewModelValidator : AbstractValidator<ChannelEditViewModel>
    {
        public ChannelEditViewModelValidator()
        {
            RuleFor(x => x.Number).Matches(Channel.NumberValidator)
                .WithMessage("Invalid channel number; one decimal is allowed for subchannels");

            RuleFor(x => x.Name).NotEmpty();
            RuleFor(x => x.FFmpegProfileId).GreaterThan(0);

            RuleFor(x => x.PreferredLanguageCode)
                .Must(
                    languageCode => CultureInfo.GetCultures(CultureTypes.NeutralCultures)
                        .Any(
                            ci => string.Equals(
                                ci.ThreeLetterISOLanguageName,
                                languageCode,
                                StringComparison.OrdinalIgnoreCase)))
                .When(vm => !string.IsNullOrWhiteSpace(vm.PreferredLanguageCode))
                .WithMessage("Preferred language code is invalid");

            RuleFor(x => x.WatermarkWidth)
                .GreaterThan(0)
                .LessThanOrEqualTo(100)
                .When(
                    vm => vm.WatermarkMode != ChannelWatermarkMode.None &&
                          vm.WatermarkSize == ChannelWatermarkSize.Scaled);

            RuleFor(x => x.WatermarkHorizontalMargin)
                .GreaterThanOrEqualTo(0)
                .LessThanOrEqualTo(50)
                .When(vm => vm.WatermarkMode != ChannelWatermarkMode.None);

            RuleFor(x => x.WatermarkVerticalMargin)
                .GreaterThanOrEqualTo(0)
                .LessThanOrEqualTo(50)
                .When(vm => vm.WatermarkMode != ChannelWatermarkMode.None);

            RuleFor(x => x.WatermarkDurationSeconds)
                .GreaterThan(0)
                .LessThan(c => c.WatermarkFrequencyMinutes * 60)
                .When(vm => vm.WatermarkMode != ChannelWatermarkMode.None);
        }
    }
}