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VideoBrowser/Core/VideoInfo.cs

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+namespace VideoBrowser.Core
+{
+    using Newtonsoft.Json.Linq;
+    using System;
+    using System.Collections.Generic;
+    using System.ComponentModel;
+    using System.IO;
+    using System.Runtime.CompilerServices;
+    using System.Threading;
+
+    /// <summary>
+    /// Defines the <see cref="VideoInfo" />
+    /// </summary>
+    public class VideoInfo : INotifyPropertyChanged
+    {
+        #region Fields
+
+        internal long _duration = 0;
+
+        internal string _thumbnailUrl = string.Empty;
+
+        internal string _title = string.Empty;
+
+        #endregion Fields
+
+        #region Constructors
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="VideoInfo"/> class.
+        /// </summary>
+        public VideoInfo()
+        {
+            this.Formats = new List<VideoFormat>();
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="VideoInfo"/> class.
+        /// </summary>
+        /// <param name="json_file">The json_file<see cref="string"/></param>
+        public VideoInfo(string json_file)
+            : this()
+        {
+            this.DeserializeJson(json_file);
+        }
+
+        #endregion Constructors
+
+        #region Events
+
+        /// <summary>
+        /// Occurs when one of the format's file size has been updated.
+        /// </summary>
+        public event FileSizeUpdateHandler FileSizeUpdated;
+
+        /// <summary>
+        /// Defines the PropertyChanged
+        /// </summary>
+        public event PropertyChangedEventHandler PropertyChanged;
+
+        #endregion Events
+
+        #region Properties
+
+        /// <summary>
+        /// Gets or sets the Duration
+        /// Gets the video duration in seconds.
+        /// </summary>
+        public long Duration
+        {
+            get => _duration;
+            set
+            {
+                _duration = value;
+                this.OnPropertyChanged();
+            }
+        }
+
+        /// <summary>
+        /// Gets or sets a value indicating whether Failure
+        /// Gets or sets whether there was a failure retrieving video information.
+        /// </summary>
+        public bool Failure { get; set; }
+
+        /// <summary>
+        /// Gets or sets the reason for failure retrieving video information.
+        /// </summary>
+        public string FailureReason { get; set; }
+
+        /// <summary>
+        /// Gets the Formats
+        /// Gets all the available formats.
+        /// </summary>
+        public List<VideoFormat> Formats { get; private set; }
+
+        /// <summary>
+        /// Gets or sets the video Id.
+        /// </summary>
+        public string Id { get; set; }
+
+        /// <summary>
+        /// Gets or sets the playlist index. Default value is -1.
+        /// </summary>
+        public int PlaylistIndex { get; set; } = -1;
+
+        /// <summary>
+        /// Gets or sets a value indicating whether RequiresAuthentication
+        /// Gets or sets whether authentication is required to get video information.
+        /// </summary>
+        public bool RequiresAuthentication { get; set; }
+
+        /// <summary>
+        /// Gets or sets the ThumbnailUrl
+        /// Gets the video thumbnail url.
+        /// </summary>
+        public string ThumbnailUrl
+        {
+            get => _thumbnailUrl;
+            set
+            {
+                _thumbnailUrl = value;
+                this.OnPropertyChanged();
+            }
+        }
+
+        /// <summary>
+        /// Gets or sets the Title
+        /// Gets the video title.
+        /// </summary>
+        public string Title
+        {
+            get => _title;
+            set
+            {
+                _title = value;
+                this.OnPropertyChanged();
+            }
+        }
+
+        /// <summary>
+        /// Gets the video url.
+        /// </summary>
+        public string Url { get; private set; }
+
+        /////// <summary>
+        /////// Gets the video source (Twitch/YouTube).
+        /////// </summary>
+        ////public VideoSource VideoSource { get; private set; }
+
+        #endregion Properties
+
+        #region Methods
+
+        /// <summary>
+        /// Aborts all the requests for file size for each video format.
+        /// </summary>
+        public void AbortUpdateFileSizes()
+        {
+            foreach (VideoFormat format in this.Formats)
+            {
+                format.AbortUpdateFileSize();
+            }
+        }
+
+        /// <summary>
+        /// The DeserializeJson
+        /// </summary>
+        /// <param name="json_file">The json_file<see cref="string"/></param>
+        public void DeserializeJson(string json_file)
+        {
+            var raw_json = ReadJSON(json_file);
+            var json = JObject.Parse(raw_json);
+
+            this.Duration = json.Value<long>("duration");
+            this.Title = json.Value<string>("fulltitle");
+            this.Id = json.Value<string>("id");
+
+            var displayId = json.Value<string>("display_id");
+            this.ThumbnailUrl = string.Format("https://i.ytimg.com/vi/{0}/mqdefault.jpg", displayId);
+            this.Url = json.Value<string>("webpage_url");
+
+            foreach (JToken token in (JArray)json["formats"])
+            {
+                this.Formats.Add(new VideoFormat(this, token));
+            }
+        }
+
+        /// <summary>
+        /// The OnFileSizeUpdated
+        /// </summary>
+        /// <param name="videoFormat">The videoFormat<see cref="VideoFormat"/></param>
+        internal void OnFileSizeUpdated(VideoFormat videoFormat)
+        {
+            this.FileSizeUpdated?.Invoke(this, new FileSizeUpdateEventArgs(videoFormat));
+        }
+
+        /// <summary>
+        /// The ReadJSON
+        /// </summary>
+        /// <param name="json_file">The json_file<see cref="string"/></param>
+        /// <returns>The <see cref="string"/></returns>
+        private static string ReadJSON(string json_file)
+        {
+            var json = string.Empty;
+
+            // Should try for about 10 seconds. */
+            var attempts = 0;
+            var maxAttempts = 20;
+
+            while ((attempts++) <= maxAttempts)
+            {
+                try
+                {
+                    json = File.ReadAllText(json_file);
+                    break;
+                }
+                catch (IOException ex)
+                {
+                    if (ex is FileNotFoundException || ex.Message.EndsWith("because it is being used by another process."))
+                    {
+                        Console.WriteLine(ex);
+                        Thread.Sleep(500);
+                    }
+                    else
+                    {
+                        throw ex;
+                    }
+                }
+            }
+
+            return json;
+        }
+
+        /// <summary>
+        /// The OnPropertyChanged
+        /// </summary>
+        /// <param name="propertyName">The propertyName<see cref="string"/></param>
+        private void OnPropertyChanged([CallerMemberName] string propertyName = "")
+        {
+            OnPropertyChangedExplicit(propertyName);
+        }
+
+        /// <summary>
+        /// The OnPropertyChangedExplicit
+        /// </summary>
+        /// <param name="propertyName">The propertyName<see cref="string"/></param>
+        private void OnPropertyChangedExplicit(string propertyName)
+        {
+            this.PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+        }
+
+        #endregion Methods
+    }
+}