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Kevin Krüger
320
VideoBrowser/Models/OperationModel.cs
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320
VideoBrowser/Models/OperationModel.cs
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namespace VideoBrowser.Models
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{
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using System;
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using System.ComponentModel;
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using System.Diagnostics;
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using System.IO;
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using System.Linq;
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using VideoBrowser.Common;
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using VideoBrowser.Controls.CefSharpBrowser.Models;
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using VideoBrowser.Core;
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using VideoBrowser.Extensions;
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using VideoBrowser.Helpers;
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/// <summary>
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/// Defines the <see cref="OperationModel" />
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/// The Download Queue Items.
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/// </summary>
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public class OperationModel : DownloadItemModel, IDisposable
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{
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#region Fields
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private string _duration;
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#endregion Fields
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#region Constructors
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/// <summary>
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/// Initializes a new instance of the <see cref="OperationModel"/> class.
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/// </summary>
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/// <param name="operation">The operation<see cref="Operation"/>.</param>
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public OperationModel(Operation operation)
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{
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this.Operation = operation;
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this.Title = this.Operation.Title;
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this.Url = this.Operation.Link;
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this.Duration = FormatString.FormatVideoLength(this.Operation.Duration);
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this.FileSize = FormatString.FormatFileSize(this.Operation.FileSize);
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this.OutputPath = this.Operation.Output;
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this.Thumbnail = this.Operation.Thumbnail;
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this.CancelDownloadCommand = new RelayCommand((o) => this.CancelDownloadAction?.Invoke(this), nameof(this.CancelDownloadCommand), (o) => this.Operation.CanStop());
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this.PauseDownloadCommand = new RelayCommand((o) => this.PauseDownloadAction?.Invoke(this), nameof(this.PauseDownloadCommand), (o) => this.Operation.CanPause() || this.Operation.CanResume());
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this.Operation.Completed += OnOperation_Completed;
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this.Operation.ProgressChanged += OnOperation_ProgressChanged;
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this.Operation.PropertyChanged += OnOperation_PropertyChanged;
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this.Operation.ReportsProgressChanged += OnOperation_ReportsProgressChanged;
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this.Operation.Started += OnOperation_Started;
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this.Operation.StatusChanged += OnOperation_StatusChanged;
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// Set Status text, so it's not empty until a StatusChanged event is fired
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this.OnOperation_StatusChanged(this, EventArgs.Empty);
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}
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#endregion Constructors
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#region Events
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/// <summary>
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/// Defines the OperationComplete.
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/// </summary>
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public event OperationEventHandler OperationComplete;
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#endregion Events
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#region Properties
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/// <summary>
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/// Gets the Duration.
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/// </summary>
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public string Duration { get => this._duration; private set => this.Set(this.PropertyChangedHandler, ref this._duration, value); }
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/// <summary>
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/// Gets or sets the Operation
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/// Gets or sets a value indicating whether IsQueuedControlsVisible.
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/// </summary>
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/// <summary>
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/// Gets the Operation...
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/// </summary>
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public Operation Operation { get; protected set; }
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/// <summary>
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/// Gets the ProgressText.
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/// </summary>
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public string ProgressText
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{
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get
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{
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string status = string.Empty;
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switch (this.Operation.Status)
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{
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case OperationStatus.Working:
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status = $"{this.Operation.ProgressPercentage}%";
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if (!string.IsNullOrEmpty(this.Status))
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status += $" ({this.Status})";
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break;
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default:
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status = this.Status;
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break;
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}
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return status;
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}
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}
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/// <summary>
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/// Gets the Stopwatch.
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/// </summary>
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public Stopwatch Stopwatch { get; private set; }
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/// <summary>
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/// Gets or sets the CancelDownloadAction.
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/// </summary>
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internal Action<OperationModel> CancelDownloadAction { get; set; }
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/// <summary>
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/// Gets or sets the PauseDownloadAction.
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/// </summary>
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internal Action<OperationModel> PauseDownloadAction { get; set; }
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/// <summary>
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/// Gets the ProgressMaximum.
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/// </summary>
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private static int ProgressMaximum { get; } = 100;
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/// <summary>
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/// Gets the ProgressMinimum.
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/// </summary>
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private static int ProgressMinimum { get; } = 0;
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#endregion Properties
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#region Methods
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/// <summary>
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/// The Dispose.
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/// </summary>
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/// <param name="disposing">The disposing<see cref="bool"/>.</param>
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protected override void Dispose(bool disposing)
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{
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base.Dispose(disposing);
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if (this.Operation.CanStop())
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{
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this.Operation.Stop();
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}
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this.Operation.Dispose();
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this.CancelDownloadAction = null;
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this.PauseDownloadAction = null;
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}
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/// <summary>
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/// The OnOperation_Completed.
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/// </summary>
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/// <param name="sender">The sender<see cref="object"/>.</param>
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/// <param name="e">The e<see cref="OperationEventArgs"/>.</param>
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private void OnOperation_Completed(object sender, OperationEventArgs e)
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{
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this.Stopwatch?.Stop();
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this.Stopwatch = null;
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if (File.Exists(this.OutputPath))
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{
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this.FileSize = string.Format(new ByteFormatProvider(), "{0:fs}", this.OutputPath);
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}
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else if (Directory.Exists(this.OutputPath))
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{
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/* Get total file size of all affected files
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*
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* Directory can contain unrelated files, so make use of List properties
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* from Operation that contains the affected files only.
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*/
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string[] fileList = null;
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////if (this.Operation is BatchOperation)
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//// fileList = (this.Operation as BatchOperation).DownloadedFiles.ToArray();
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////else if (this.Operation is ConvertOperation)
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//// fileList = (this.Operation as ConvertOperation).ProcessedFiles.ToArray();
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////else if (this.Operation is PlaylistOperation)
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//// fileList = (this.Operation as PlaylistOperation).DownloadedFiles.ToArray();
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////else
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//// throw new Exception("Couldn't get affected file list from operation " + this.Operation.GetType().Name);
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long fileSize = fileList.Sum(f => FileHelper.GetFileSize(f));
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this.FileSize = FormatString.FormatFileSize(fileSize);
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}
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this.Progress = ProgressMaximum;
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this.OperationComplete?.Invoke(this, e);
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}
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/// <summary>
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/// The OnOperation_ProgressChanged.
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/// </summary>
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/// <param name="sender">The sender<see cref="object"/>.</param>
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/// <param name="e">The e<see cref="ProgressChangedEventArgs"/>.</param>
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private void OnOperation_ProgressChanged(object sender, ProgressChangedEventArgs e)
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{
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this.Progress = Math.Min(ProgressMaximum, Math.Max(ProgressMinimum, e.ProgressPercentage));
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if (!string.IsNullOrEmpty(this.Operation.ProgressText))
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{
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this.Status = this.Operation.ProgressText;
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}
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else
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{
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if (this.Wait())
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{
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return;
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}
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this.Stopwatch?.Restart();
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this.Status = this.Operation.Speed + this.Operation.ETA;
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}
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}
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/// <summary>
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/// The OnOperation_PropertyChanged.
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/// </summary>
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/// <param name="sender">The sender<see cref="object"/>.</param>
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/// <param name="e">The e<see cref="PropertyChangedEventArgs"/>.</param>
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private void OnOperation_PropertyChanged(object sender, PropertyChangedEventArgs e)
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{
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switch (e.PropertyName)
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{
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case nameof(Operation.Duration):
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this.Duration = FormatString.FormatVideoLength(this.Operation.Duration);
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break;
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case nameof(Operation.FileSize):
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this.FileSize = FormatString.FormatFileSize(this.Operation.FileSize);
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break;
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case nameof(Operation.Input):
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this.Url = this.Operation.Input;
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break;
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case nameof(Operation.Title):
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this.Title = this.Operation.Title;
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break;
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case nameof(Operation.Thumbnail):
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this.Thumbnail = this.Operation.Thumbnail;
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break;
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}
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}
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/// <summary>
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/// The OnOperation_ReportsProgressChanged.
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/// </summary>
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/// <param name="sender">The sender<see cref="object"/>.</param>
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/// <param name="e">The e<see cref="EventArgs"/>.</param>
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private void OnOperation_ReportsProgressChanged(object sender, EventArgs e)
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{
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}
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/// <summary>
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/// The OnOperation_Started.
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/// </summary>
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/// <param name="sender">The sender<see cref="object"/>.</param>
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/// <param name="e">The e<see cref="EventArgs"/>.</param>
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private void OnOperation_Started(object sender, EventArgs e)
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{
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this.Stopwatch = new Stopwatch();
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this.Stopwatch.Start();
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}
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/// <summary>
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/// The OnOperation_StatusChanged.
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/// </summary>
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/// <param name="sender">The sender<see cref="object"/>.</param>
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/// <param name="e">The e<see cref="EventArgs"/>.</param>
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private void OnOperation_StatusChanged(object sender, EventArgs e)
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{
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switch (this.Operation.Status)
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{
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case OperationStatus.Success:
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this.Status = "Completed";
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this.IsQueuedControlsVisible = false;
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break;
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case OperationStatus.Canceled:
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case OperationStatus.Failed:
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case OperationStatus.Paused:
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case OperationStatus.Queued:
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this.Status = this.Operation.Status.ToString();
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break;
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case OperationStatus.Working:
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if (!string.IsNullOrEmpty(this.Operation.ProgressText))
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{
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this.Status = this.Operation.ProgressText;
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}
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break;
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}
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}
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/// <summary>
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/// The Wait.
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/// </summary>
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/// <returns>The <see cref="bool"/>.</returns>
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private bool Wait()
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{
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// Limit the progress update to avoid flickering.
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if (this.Stopwatch == null || !this.Stopwatch.IsRunning)
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{
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return false;
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}
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return this.Stopwatch.ElapsedMilliseconds < AppEnvironment.ProgressUpdateDelay;
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}
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#endregion Methods
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}
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}
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