using System.Threading; using System.Threading.Tasks; using ErsatzTV.Core; using ErsatzTV.Core.Domain; using ErsatzTV.Core.Interfaces.Scheduling; using ErsatzTV.Infrastructure.Data; using ErsatzTV.Infrastructure.Extensions; using LanguageExt; using Microsoft.EntityFrameworkCore; namespace ErsatzTV.Application.Playouts.Commands { public class BuildPlayoutHandler : MediatR.IRequestHandler> { private readonly IDbContextFactory _dbContextFactory; private readonly IPlayoutBuilder _playoutBuilder; public BuildPlayoutHandler(IDbContextFactory dbContextFactory, IPlayoutBuilder playoutBuilder) { _dbContextFactory = dbContextFactory; _playoutBuilder = playoutBuilder; } public async Task> Handle(BuildPlayout request, CancellationToken cancellationToken) { await using TvContext dbContext = _dbContextFactory.CreateDbContext(); Validation validation = await Validate(dbContext, request); return await validation.Apply(playout => ApplyUpdateRequest(dbContext, request, playout)); } private async Task ApplyUpdateRequest(TvContext dbContext, BuildPlayout request, Playout playout) { await _playoutBuilder.BuildPlayoutItems(playout, request.Rebuild); await dbContext.SaveChangesAsync(); return Unit.Default; } private static Task> Validate(TvContext dbContext, BuildPlayout request) => PlayoutMustExist(dbContext, request); private static Task> PlayoutMustExist( TvContext dbContext, BuildPlayout buildPlayout) => dbContext.Playouts .Include(p => p.Channel) .Include(p => p.Items) .Include(p => p.ProgramScheduleAnchors) .ThenInclude(a => a.MediaItem) .Include(p => p.ProgramSchedule) .ThenInclude(ps => ps.Items) .ThenInclude(psi => psi.Collection) .Include(p => p.ProgramSchedule) .ThenInclude(ps => ps.Items) .ThenInclude(psi => psi.MediaItem) .Include(p => p.ProgramSchedule) .ThenInclude(ps => ps.Items) .ThenInclude(psi => psi.PreRollFiller) .Include(p => p.ProgramSchedule) .ThenInclude(ps => ps.Items) .ThenInclude(psi => psi.MidRollFiller) .Include(p => p.ProgramSchedule) .ThenInclude(ps => ps.Items) .ThenInclude(psi => psi.PostRollFiller) .Include(p => p.ProgramSchedule) .ThenInclude(ps => ps.Items) .ThenInclude(psi => psi.TailFiller) .Include(p => p.ProgramSchedule) .ThenInclude(ps => ps.Items) .ThenInclude(psi => psi.FallbackFiller) .SelectOneAsync(p => p.Id, p => p.Id == buildPlayout.PlayoutId) .Map(o => o.ToValidation("Playout does not exist.")); } }