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using System;
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using System.Collections.Generic;
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using FluentValidation;
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using Microsoft.AspNetCore.Mvc;
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using NLog;
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using NzbDrone.Common.Cache;
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using NzbDrone.Common.Extensions;
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using NzbDrone.Core.Books;
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using NzbDrone.Core.DecisionEngine;
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using NzbDrone.Core.Download;
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using NzbDrone.Core.Exceptions;
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using NzbDrone.Core.Indexers;
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using NzbDrone.Core.IndexerSearch;
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using NzbDrone.Core.Parser;
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using NzbDrone.Core.Parser.Model;
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using NzbDrone.Core.Validation;
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using Readarr.Http;
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using HttpStatusCode = System.Net.HttpStatusCode;
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namespace Readarr.Api.V1.Indexers
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{
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[V1ApiController]
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public class ReleaseController : ReleaseControllerBase
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{
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private readonly IFetchAndParseRss _rssFetcherAndParser;
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private readonly ISearchForReleases _releaseSearchService;
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private readonly IMakeDownloadDecision _downloadDecisionMaker;
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private readonly IPrioritizeDownloadDecision _prioritizeDownloadDecision;
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private readonly IDownloadService _downloadService;
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private readonly IAuthorService _authorService;
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private readonly IBookService _bookService;
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private readonly IParsingService _parsingService;
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private readonly Logger _logger;
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private readonly ICached<RemoteBook> _remoteBookCache;
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public ReleaseController(IFetchAndParseRss rssFetcherAndParser,
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ISearchForReleases releaseSearchService,
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IMakeDownloadDecision downloadDecisionMaker,
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IPrioritizeDownloadDecision prioritizeDownloadDecision,
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IDownloadService downloadService,
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IAuthorService authorService,
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IBookService bookService,
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IParsingService parsingService,
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ICacheManager cacheManager,
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Logger logger)
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{
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_rssFetcherAndParser = rssFetcherAndParser;
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_releaseSearchService = releaseSearchService;
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_downloadDecisionMaker = downloadDecisionMaker;
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_prioritizeDownloadDecision = prioritizeDownloadDecision;
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_downloadService = downloadService;
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_authorService = authorService;
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_bookService = bookService;
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_parsingService = parsingService;
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_logger = logger;
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PostValidator.RuleFor(s => s.IndexerId).ValidId();
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PostValidator.RuleFor(s => s.Guid).NotEmpty();
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_remoteBookCache = cacheManager.GetCache<RemoteBook>(GetType(), "remoteBooks");
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}
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[HttpPost]
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public ActionResult<ReleaseResource> Create(ReleaseResource release)
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{
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ValidateResource(release);
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var remoteBook = _remoteBookCache.Find(GetCacheKey(release));
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if (remoteBook == null)
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{
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_logger.Debug("Couldn't find requested release in cache, cache timeout probably expired.");
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throw new NzbDroneClientException(HttpStatusCode.NotFound, "Couldn't find requested release in cache, try searching again");
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}
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try
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{
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if (remoteBook.Author == null)
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{
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if (release.BookId.HasValue)
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{
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var book = _bookService.GetBook(release.BookId.Value);
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remoteBook.Author = _authorService.GetAuthor(book.AuthorId);
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remoteBook.Books = new List<Book> { book };
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}
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else if (release.AuthorId.HasValue)
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{
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var author = _authorService.GetAuthor(release.AuthorId.Value);
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var books = _parsingService.GetBooks(remoteBook.ParsedBookInfo, author);
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if (books.Empty())
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{
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throw new NzbDroneClientException(HttpStatusCode.NotFound, "Unable to parse books in the release");
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}
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remoteBook.Author = author;
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remoteBook.Books = books;
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}
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else
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{
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throw new NzbDroneClientException(HttpStatusCode.NotFound, "Unable to find matching author and books");
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}
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}
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else if (remoteBook.Books.Empty())
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{
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var books = _parsingService.GetBooks(remoteBook.ParsedBookInfo, remoteBook.Author);
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if (books.Empty() && release.BookId.HasValue)
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{
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var book = _bookService.GetBook(release.BookId.Value);
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books = new List<Book> { book };
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}
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remoteBook.Books = books;
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}
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if (remoteBook.Books.Empty())
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{
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throw new NzbDroneClientException(HttpStatusCode.NotFound, "Unable to parse books in the release");
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}
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_downloadService.DownloadReport(remoteBook);
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}
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catch (ReleaseDownloadException ex)
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{
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_logger.Error(ex, "Getting release from indexer failed");
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throw new NzbDroneClientException(HttpStatusCode.Conflict, "Getting release from indexer failed");
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}
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return Ok(release);
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}
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[HttpGet]
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public List<ReleaseResource> GetReleases(int? bookId, int? authorId)
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{
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if (bookId.HasValue)
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{
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return GetBookReleases(int.Parse(Request.Query["bookId"]));
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}
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if (authorId.HasValue)
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{
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return GetAuthorReleases(int.Parse(Request.Query["authorId"]));
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}
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return GetRss();
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}
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private List<ReleaseResource> GetBookReleases(int bookId)
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{
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try
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{
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var decisions = _releaseSearchService.BookSearch(bookId, true, true, true);
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var prioritizedDecisions = _prioritizeDownloadDecision.PrioritizeDecisions(decisions);
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return MapDecisions(prioritizedDecisions);
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}
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catch (Exception ex)
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{
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_logger.Error(ex, "Book search failed");
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throw new NzbDroneClientException(HttpStatusCode.InternalServerError, ex.Message);
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}
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}
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private List<ReleaseResource> GetAuthorReleases(int authorId)
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{
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try
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{
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var decisions = _releaseSearchService.AuthorSearch(authorId, false, true, true);
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var prioritizedDecisions = _prioritizeDownloadDecision.PrioritizeDecisions(decisions);
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return MapDecisions(prioritizedDecisions);
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}
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catch (Exception ex)
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{
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_logger.Error(ex, "Author search failed");
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throw new NzbDroneClientException(HttpStatusCode.InternalServerError, ex.Message);
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}
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}
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private List<ReleaseResource> GetRss()
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{
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var reports = _rssFetcherAndParser.Fetch();
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var decisions = _downloadDecisionMaker.GetRssDecision(reports);
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var prioritizedDecisions = _prioritizeDownloadDecision.PrioritizeDecisions(decisions);
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return MapDecisions(prioritizedDecisions);
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}
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protected override ReleaseResource MapDecision(DownloadDecision decision, int initialWeight)
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{
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var resource = base.MapDecision(decision, initialWeight);
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_remoteBookCache.Set(GetCacheKey(resource), decision.RemoteBook, TimeSpan.FromMinutes(30));
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return resource;
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}
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private string GetCacheKey(ReleaseResource resource)
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{
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return string.Concat(resource.IndexerId, "_", resource.Guid);
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}
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}
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}
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