97 lines
4.5 KiB
C#
97 lines
4.5 KiB
C#
namespace Tranga;
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/// <summary>
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/// Executes TrangaTasks
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/// Based on the TrangaTask.Task a method is called.
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/// The chapterCollection is updated with new Publications/Chapters.
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/// </summary>
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public static class TaskExecutor
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{
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/// <summary>
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/// Executes TrangaTask.
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/// </summary>
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/// <param name="connectors">List of all available Connectors</param>
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/// <param name="trangaTask">Task to execute</param>
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/// <param name="chapterCollection">Current chapterCollection to update</param>
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/// <exception cref="ArgumentException">Is thrown when there is no Connector available with the name of the TrangaTask.connectorName</exception>
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public static void Execute(Connector[] connectors, TrangaTask trangaTask, Dictionary<Publication, List<Chapter>> chapterCollection)
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{
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//Get Connector from list of available Connectors and the required Connector of the TrangaTask
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Connector? connector = connectors.FirstOrDefault(c => c.name == trangaTask.connectorName);
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if (connector is null)
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throw new ArgumentException($"Connector {trangaTask.connectorName} is not a known connector.");
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if (trangaTask.isBeingExecuted)
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return;
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trangaTask.isBeingExecuted = true;
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trangaTask.lastExecuted = DateTime.Now;
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//Call appropriate Method based on TrangaTask.Task
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switch (trangaTask.task)
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{
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case TrangaTask.Task.DownloadNewChapters:
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DownloadNewChapters(connector, (Publication)trangaTask.publication!, trangaTask.language, chapterCollection);
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break;
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case TrangaTask.Task.UpdateChapters:
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UpdateChapters(connector, (Publication)trangaTask.publication!, trangaTask.language, chapterCollection);
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break;
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case TrangaTask.Task.UpdatePublications:
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UpdatePublications(connector, chapterCollection);
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break;
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}
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trangaTask.isBeingExecuted = false;
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}
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/// <summary>
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/// Updates the available Publications from a Connector (all of them)
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/// </summary>
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/// <param name="connector">Connector to receive Publications from</param>
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/// <param name="chapterCollection"></param>
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private static void UpdatePublications(Connector connector, Dictionary<Publication, List<Chapter>> chapterCollection)
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{
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Publication[] publications = connector.GetPublications();
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foreach (Publication publication in publications)
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chapterCollection.TryAdd(publication, new List<Chapter>());
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}
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/// <summary>
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/// Checks for new Chapters and Downloads new ones.
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/// If no Chapters had been downloaded previously, download also cover and create series.json
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/// </summary>
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/// <param name="connector">Connector to use</param>
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/// <param name="publication">Publication to check</param>
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/// <param name="language">Language to receive chapters for</param>
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/// <param name="chapterCollection"></param>
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private static void DownloadNewChapters(Connector connector, Publication publication, string language, Dictionary<Publication, List<Chapter>> chapterCollection)
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{
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List<Chapter> newChapters = UpdateChapters(connector, publication, language, chapterCollection);
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foreach(Chapter newChapter in newChapters)
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connector.DownloadChapter(publication, newChapter);
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connector.DownloadCover(publication);
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connector.SaveSeriesInfo(publication);
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}
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/// <summary>
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/// Updates the available Chapters of a Publication
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/// </summary>
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/// <param name="connector">Connector to use</param>
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/// <param name="publication">Publication to check</param>
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/// <param name="language">Language to receive chapters for</param>
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/// <param name="chapterCollection"></param>
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/// <returns>List of Chapters that were previously not in collection</returns>
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private static List<Chapter> UpdateChapters(Connector connector, Publication publication, string language, Dictionary<Publication, List<Chapter>> chapterCollection)
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{
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List<Chapter> newChaptersList = new();
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if (!chapterCollection.ContainsKey(publication))
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return newChaptersList;
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List<Chapter> currentChapters = chapterCollection[publication];
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Chapter[] newChapters = connector.GetChapters(publication, language);
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newChaptersList = newChapters.ToList()
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.ExceptBy(currentChapters.Select(cChapter => cChapter.url), nChapter => nChapter.url).ToList();
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return newChaptersList;
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}
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} |