89 lines
2.7 KiB
C#
89 lines
2.7 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.Net.Http;
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using System.Threading.Tasks;
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using ApplicationServices;
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using DataLayer;
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using Dinah.Core.ErrorHandling;
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using Dinah.Core.Net.Http;
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using FileManager;
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using LibationFileManager;
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namespace FileLiberator
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{
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public class DownloadPdf : Processable
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{
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public override string Name => "Download Pdf";
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public override bool Validate(LibraryBook libraryBook)
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=> !string.IsNullOrWhiteSpace(getdownloadUrl(libraryBook))
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&& !libraryBook.Book.PDF_Exists();
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public override async Task<StatusHandler> ProcessAsync(LibraryBook libraryBook)
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{
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OnBegin(libraryBook);
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try
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{
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var proposedDownloadFilePath = getProposedDownloadFilePath(libraryBook);
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var actualDownloadedFilePath = await downloadPdfAsync(libraryBook, proposedDownloadFilePath);
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var result = verifyDownload(actualDownloadedFilePath);
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libraryBook.Book.UpdatePdfStatus(result.IsSuccess ? LiberatedStatus.Liberated : LiberatedStatus.NotLiberated);
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return result;
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}
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finally
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{
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OnCompleted(libraryBook);
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}
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}
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private static string getProposedDownloadFilePath(LibraryBook libraryBook)
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{
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var extension = Path.GetExtension(getdownloadUrl(libraryBook));
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// if audio file exists, get it's dir. else return base Book dir
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var existingPath = Path.GetDirectoryName(AudibleFileStorage.Audio.GetPath(libraryBook.Book.AudibleProductId));
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if (existingPath is not null)
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return AudibleFileStorage.Audio.GetCustomDirFilename(libraryBook, existingPath, extension);
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return AudibleFileStorage.Audio.GetBooksDirectoryFilename(libraryBook, extension);
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}
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private static string getdownloadUrl(LibraryBook libraryBook)
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=> libraryBook?.Book?.Supplements?.FirstOrDefault()?.Url;
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private async Task<string> downloadPdfAsync(LibraryBook libraryBook, string proposedDownloadFilePath)
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{
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OnStreamingBegin(proposedDownloadFilePath);
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try
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{
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var api = await libraryBook.GetApiAsync();
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var downloadUrl = await api.GetPdfDownloadLinkAsync(libraryBook.Book.AudibleProductId);
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var progress = new Progress<DownloadProgress>(OnStreamingProgressChanged);
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var client = new HttpClient();
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var actualDownloadedFilePath = await client.DownloadFileAsync(downloadUrl, proposedDownloadFilePath, progress);
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OnFileCreated(libraryBook, actualDownloadedFilePath);
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OnStatusUpdate(actualDownloadedFilePath);
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return actualDownloadedFilePath;
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}
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finally
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{
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OnStreamingCompleted(proposedDownloadFilePath);
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}
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}
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private static StatusHandler verifyDownload(string actualDownloadedFilePath)
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=> !File.Exists(actualDownloadedFilePath)
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? new StatusHandler { "Downloaded PDF cannot be found" }
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: new StatusHandler();
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}
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}
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