54 lines
1.9 KiB
C#
54 lines
1.9 KiB
C#
using System;
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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 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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namespace FileLiberator
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{
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public class DownloadPdf : DownloadableBase
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{
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public override bool Validate(LibraryBook libraryBook)
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=> !string.IsNullOrWhiteSpace(getdownloadUrl(libraryBook))
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&& !AudibleFileStorage.PDF.Exists(libraryBook.Book.AudibleProductId);
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private static string getdownloadUrl(LibraryBook libraryBook)
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=> libraryBook?.Book?.Supplements?.FirstOrDefault()?.Url;
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public override async Task<StatusHandler> ProcessItemAsync(LibraryBook libraryBook)
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{
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var proposedDownloadFilePath = getProposedDownloadFilePath(libraryBook);
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await downloadPdfAsync(libraryBook, proposedDownloadFilePath);
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return verifyDownload(libraryBook);
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}
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private static string getProposedDownloadFilePath(LibraryBook libraryBook)
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{
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// if audio file exists, get it's dir. else return base Book dir
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var destinationDir =
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// this is safe b/c GetDirectoryName(null) == null
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Path.GetDirectoryName(AudibleFileStorage.Audio.GetPath(libraryBook.Book.AudibleProductId))
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?? AudibleFileStorage.PDF.StorageDirectory;
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return Path.Combine(destinationDir, Path.GetFileName(getdownloadUrl(libraryBook)));
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}
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private async Task downloadPdfAsync(LibraryBook libraryBook, string proposedDownloadFilePath)
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{
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var client = new HttpClient();
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var actualDownloadedFilePath = await PerformDownloadAsync(
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proposedDownloadFilePath,
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(p) => client.DownloadFileAsync(getdownloadUrl(libraryBook), proposedDownloadFilePath, p));
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}
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private static StatusHandler verifyDownload(LibraryBook libraryBook)
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=> !AudibleFileStorage.PDF.Exists(libraryBook.Book.AudibleProductId)
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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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