62 lines
2.4 KiB
C#
62 lines
2.4 KiB
C#
using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Threading;
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using System.Threading.Tasks;
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using ErsatzTV.Core;
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using ErsatzTV.Core.Domain;
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using ErsatzTV.Core.Interfaces.Repositories;
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using LanguageExt;
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using MediatR;
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using static LanguageExt.Prelude;
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using static ErsatzTV.Application.Libraries.Mapper;
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namespace ErsatzTV.Application.Libraries.Commands
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{
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public class CreateLocalLibraryPathHandler : IRequestHandler<CreateLocalLibraryPath,
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Either<BaseError, LocalLibraryPathViewModel>>
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{
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private readonly ILibraryRepository _libraryRepository;
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public CreateLocalLibraryPathHandler(ILibraryRepository libraryRepository) =>
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_libraryRepository = libraryRepository;
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public Task<Either<BaseError, LocalLibraryPathViewModel>> Handle(
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CreateLocalLibraryPath request,
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CancellationToken cancellationToken) =>
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Validate(request).MapT(PersistLocalLibraryPath).Bind(v => v.ToEitherAsync());
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private Task<LocalLibraryPathViewModel> PersistLocalLibraryPath(LibraryPath p) =>
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_libraryRepository.Add(p).Map(ProjectToViewModel);
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private Task<Validation<BaseError, LibraryPath>> Validate(CreateLocalLibraryPath request) =>
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ValidateFolder(request)
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.MapT(
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folder =>
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new LibraryPath
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{
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LibraryId = request.LibraryId,
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Path = folder
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});
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private async Task<Validation<BaseError, string>> ValidateFolder(CreateLocalLibraryPath request)
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{
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List<string> allPaths = await _libraryRepository.GetLocalPaths(request.LibraryId)
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.Map(list => list.Map(c => c.Path).ToList());
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return Optional(request.Path)
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.Where(folder => allPaths.ForAll(f => !AreSubPaths(f, folder)))
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.ToValidation<BaseError>("Path must not belong to another library path");
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}
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private static bool AreSubPaths(string path1, string path2)
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{
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string one = path1 + Path.DirectorySeparatorChar;
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string two = path2 + Path.DirectorySeparatorChar;
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return one == two || one.StartsWith(two, StringComparison.OrdinalIgnoreCase) ||
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two.StartsWith(one, StringComparison.OrdinalIgnoreCase);
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}
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}
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}
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