Tranga-Website/Tranga/TaskManager.cs
2023-05-19 20:22:13 +02:00

172 lines
6.1 KiB
C#

using Newtonsoft.Json;
using Tranga.Connectors;
namespace Tranga;
/// <summary>
/// Manages all TrangaTasks.
/// Provides a Threaded environment to execute Tasks, and still manage the Task-Collection
/// </summary>
public class TaskManager
{
private readonly Dictionary<Publication, List<Chapter>> _chapterCollection;
private readonly HashSet<TrangaTask> _allTasks;
private bool _continueRunning = true;
private readonly Connector[] connectors;
private readonly string folderPath;
/// <summary>
///
/// </summary>
/// <param name="folderPath">Local path to save data (Manga) to</param>
public TaskManager(string folderPath)
{
this.folderPath = folderPath;
this.connectors = new Connector[]{ new MangaDex(folderPath) };
_chapterCollection = new();
_allTasks = ImportTasks(Directory.GetCurrentDirectory());
Thread taskChecker = new(TaskCheckerThread);
taskChecker.Start();
}
private void TaskCheckerThread()
{
while (_continueRunning)
{
foreach (TrangaTask task in _allTasks)
{
if(task.ShouldExecute())
TaskExecutor.Execute(this.connectors, task, this._chapterCollection);
}
Thread.Sleep(1000);
}
}
/// <summary>
/// Forces the execution of a given task
/// </summary>
/// <param name="task">Task to execute</param>
public void ExecuteTaskNow(TrangaTask task)
{
if (!this._allTasks.Contains(task))
return;
Task t = new Task(() =>
{
TaskExecutor.Execute(this.connectors, task, this._chapterCollection);
});
t.Start();
}
/// <summary>
/// Creates and adds a new Task to the task-Collection
/// </summary>
/// <param name="task">TrangaTask.Task to later execute</param>
/// <param name="connectorName">Name of the connector to use</param>
/// <param name="publication">Publication to execute Task on, can be null in case of unrelated Task</param>
/// <param name="reoccurrence">Time-Interval between Executions</param>
/// <param name="language">language, should Task require parameter. Can be empty</param>
/// <exception cref="ArgumentException">Is thrown when connectorName is not a available Connector</exception>
public void AddTask(TrangaTask.Task task, string connectorName, Publication? publication, TimeSpan reoccurrence,
string language = "")
{
//Get appropriate Connector from available Connectors for TrangaTask
Connector? connector = connectors.FirstOrDefault(c => c.name == connectorName);
if (connector is null)
throw new ArgumentException($"Connector {connectorName} is not a known connector.");
//Check if same task already exists
if (!_allTasks.Any(trangaTask => trangaTask.task != task && trangaTask.connectorName != connector.name &&
trangaTask.publication?.downloadUrl != publication?.downloadUrl))
{
if(task != TrangaTask.Task.UpdatePublications)
_chapterCollection.Add((Publication)publication!, new List<Chapter>());
_allTasks.Add(new TrangaTask(connector.name, task, publication, reoccurrence, language));
ExportTasks(Directory.GetCurrentDirectory());
}
}
/// <summary>
/// Removes Task from task-collection
/// </summary>
/// <param name="task">TrangaTask.Task type</param>
/// <param name="connectorName">Name of Connector that was used</param>
/// <param name="publication">Publication that was used</param>
public void RemoveTask(TrangaTask.Task task, string connectorName, Publication? publication)
{
_allTasks.RemoveWhere(trangaTask =>
trangaTask.task == task && trangaTask.connectorName == connectorName &&
trangaTask.publication?.downloadUrl == publication?.downloadUrl);
ExportTasks(Directory.GetCurrentDirectory());
}
/// <summary>
///
/// </summary>
/// <returns>All available Connectors</returns>
public Dictionary<string, Connector> GetAvailableConnectors()
{
return this.connectors.ToDictionary(connector => connector.name, connector => connector);
}
/// <summary>
///
/// </summary>
/// <returns>All TrangaTasks in task-collection</returns>
public TrangaTask[] GetAllTasks()
{
TrangaTask[] ret = new TrangaTask[_allTasks.Count];
_allTasks.CopyTo(ret);
return ret;
}
/// <summary>
///
/// </summary>
/// <returns>All added Publications</returns>
public Publication[] GetAllPublications()
{
return this._chapterCollection.Keys.ToArray();
}
/// <summary>
/// Shuts down the taskManager.
/// </summary>
/// <param name="force">If force is true, tasks are aborted.</param>
public void Shutdown(bool force = false)
{
_continueRunning = false;
ExportTasks(Directory.GetCurrentDirectory());
if(force)
Environment.Exit(_allTasks.Count(task => task.isBeingExecuted));
//Wait for tasks to finish
while(_allTasks.Any(task => task.isBeingExecuted))
Thread.Sleep(10);
Environment.Exit(0);
}
private HashSet<TrangaTask> ImportTasks(string importFolderPath)
{
string filePath = Path.Join(importFolderPath, "tasks.json");
if (!File.Exists(filePath))
return new HashSet<TrangaTask>();
string toRead = File.ReadAllText(filePath);
TrangaTask[] importTasks = JsonConvert.DeserializeObject<TrangaTask[]>(toRead)!;
foreach(TrangaTask task in importTasks.Where(task => task.publication is not null))
this._chapterCollection.Add((Publication)task.publication!, new List<Chapter>());
return importTasks.ToHashSet();
}
private void ExportTasks(string exportFolderPath)
{
string filePath = Path.Join(exportFolderPath, "tasks.json");
string toWrite = JsonConvert.SerializeObject(_allTasks.ToArray());
File.WriteAllText(filePath,toWrite);
}
}