69 lines
2.8 KiB
C#
69 lines
2.8 KiB
C#
using ErsatzTV.Core;
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using ErsatzTV.Core.Domain;
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using ErsatzTV.Infrastructure.Data;
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using Microsoft.EntityFrameworkCore;
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namespace ErsatzTV.Application.ProgramSchedules;
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public class CreateProgramScheduleHandler :
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IRequestHandler<CreateProgramSchedule, Either<BaseError, CreateProgramScheduleResult>>
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{
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private readonly IDbContextFactory<TvContext> _dbContextFactory;
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public CreateProgramScheduleHandler(IDbContextFactory<TvContext> dbContextFactory) =>
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_dbContextFactory = dbContextFactory;
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public async Task<Either<BaseError, CreateProgramScheduleResult>> Handle(
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CreateProgramSchedule request,
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CancellationToken cancellationToken)
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{
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await using TvContext dbContext = await _dbContextFactory.CreateDbContextAsync(cancellationToken);
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Validation<BaseError, ProgramSchedule> validation = await Validate(dbContext, request);
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return await validation.Apply(ps => PersistProgramSchedule(dbContext, ps));
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}
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private static async Task<CreateProgramScheduleResult> PersistProgramSchedule(
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TvContext dbContext,
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ProgramSchedule programSchedule)
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{
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await dbContext.ProgramSchedules.AddAsync(programSchedule);
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await dbContext.SaveChangesAsync();
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return new CreateProgramScheduleResult(programSchedule.Id);
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}
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private static Task<Validation<BaseError, ProgramSchedule>> Validate(
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TvContext dbContext,
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CreateProgramSchedule request) =>
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ValidateName(dbContext, request).MapT(
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name =>
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{
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bool keepMultiPartEpisodesTogether = request.KeepMultiPartEpisodesTogether;
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return new ProgramSchedule
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{
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Name = name,
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KeepMultiPartEpisodesTogether = keepMultiPartEpisodesTogether,
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TreatCollectionsAsShows = keepMultiPartEpisodesTogether && request.TreatCollectionsAsShows,
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ShuffleScheduleItems = request.ShuffleScheduleItems,
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RandomStartPoint = request.RandomStartPoint
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};
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});
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private static async Task<Validation<BaseError, string>> ValidateName(
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TvContext dbContext,
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CreateProgramSchedule createProgramSchedule)
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{
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Validation<BaseError, string> result1 = createProgramSchedule.NotEmpty(c => c.Name)
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.Bind(_ => createProgramSchedule.NotLongerThan(50)(c => c.Name));
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int duplicateNameCount = await dbContext.ProgramSchedules
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.CountAsync(ps => ps.Name == createProgramSchedule.Name);
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var result2 = Optional(duplicateNameCount)
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.Where(count => count == 0)
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.ToValidation<BaseError>("Schedule name must be unique");
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return (result1, result2).Apply((_, _) => createProgramSchedule.Name);
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}
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}
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