Stream custom live channels using your own media
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using System.Threading;
using System.Threading.Tasks;
using ErsatzTV.Core;
using ErsatzTV.Core.Domain;
using ErsatzTV.Infrastructure.Data;
using LanguageExt;
using MediatR;
using Microsoft.EntityFrameworkCore;
namespace ErsatzTV.Application.Watermarks.Commands
{
public class CreateWatermarkHandler : IRequestHandler<CreateWatermark, Either<BaseError, CreateWatermarkResult>>
{
private readonly IDbContextFactory<TvContext> _dbContextFactory;
public CreateWatermarkHandler(IDbContextFactory<TvContext> dbContextFactory) =>
_dbContextFactory = dbContextFactory;
public async Task<Either<BaseError, CreateWatermarkResult>> Handle(
CreateWatermark request,
CancellationToken cancellationToken)
{
await using TvContext dbContext = _dbContextFactory.CreateDbContext();
Validation<BaseError, ChannelWatermark> validation = Validate(request);
return await validation.Apply(profile => PersistChannelWatermark(dbContext, profile));
}
private static async Task<CreateWatermarkResult> PersistChannelWatermark(
TvContext dbContext,
ChannelWatermark watermark)
{
await dbContext.ChannelWatermarks.AddAsync(watermark);
await dbContext.SaveChangesAsync();
return new CreateWatermarkResult(watermark.Id);
}
private static Validation<BaseError, ChannelWatermark> Validate(CreateWatermark request) =>
ValidateName(request)
.Map(
_ => new ChannelWatermark
{
Name = request.Name,
Image = request.ImageSource == ChannelWatermarkImageSource.Custom ? request.Image : null,
Mode = request.Mode,
ImageSource = request.ImageSource,
Location = request.Location,
Size = request.Size,
WidthPercent = request.Width,
HorizontalMarginPercent = request.HorizontalMargin,
VerticalMarginPercent = request.VerticalMargin,
FrequencyMinutes = request.FrequencyMinutes,
DurationSeconds = request.DurationSeconds,
Opacity = request.Opacity
});
private static Validation<BaseError, string> ValidateName(CreateWatermark request) =>
request.NotEmpty(x => x.Name)
.Bind(_ => request.NotLongerThan(50)(x => x.Name));
}
}