downkyi/DownKyi/Models/DownloadingItem.cs

using DownKyi.Core.BiliApi.VideoStream.Models;
using DownKyi.Images;
using DownKyi.Utils;
using Prism.Commands;
using Prism.Mvvm;
using System;
using System.Collections.Generic;
using System.Windows.Media;

namespace DownKyi.Models
{
    public class DownloadingItem : BindableBase
    {
        public DownloadingItem()
        {
            // 唯一id
            Uuid = Guid.NewGuid().ToString("N");

            // 初始化下载的文件列表
            DownloadFiles = new List<string>();

            // 初始化需要下载的内容
            NeedDownloadContent = new Dictionary<string, bool>
            {
                { "downloadAudio", true },
                { "downloadVideo", true },
                { "downloadDanmaku", true },
                { "downloadSubtitle", true },
                { "downloadCover", true }
            };

            // 暂停继续按钮
            StartOrPause = ButtonIcon.Instance().Pause;
            StartOrPause.Fill = DictionaryResource.GetColor("ColorPrimary");

            // 删除按钮
            Delete = ButtonIcon.Instance().Delete;
            Delete.Fill = DictionaryResource.GetColor("ColorPrimary");
        }

        public PlayUrl PlayUrl { get; set; }

        // 此条下载项的id
        public string Uuid { get; }

        // Aria相关
        public string Gid { get; set; }

        // 文件路径，不包含扩展名，所有内容均以此路径下载
        public string FilePath { get; set; }

        // 下载的文件
        public List<string> DownloadFiles { get; private set; }

        // 文件大小
        private string fileSize;
        public string FileSize
        {
            get => fileSize;
            set => SetProperty(ref fileSize, value);
        }

        // 视频类别
        public PlayStreamType PlayStreamType { get; set; }

        // 视频的id
        public string Bvid { get; set; }
        public long Avid { get; set; }
        public long Cid { get; set; }
        public long EpisodeId { get; set; }

        // 视频封面的url
        public string CoverUrl { get; set; }

        private DrawingImage zoneImage;
        public DrawingImage ZoneImage
        {
            get => zoneImage;
            set => SetProperty(ref zoneImage, value);
        }

        // 视频序号
        private int order;
        public int Order
        {
            get => order;
            set => SetProperty(ref order, value);
        }

        // 视频主标题
        private string mainTitle;
        public string MainTitle
        {
            get => mainTitle;
            set => SetProperty(ref mainTitle, value);
        }

        // 视频标题
        private string name;
        public string Name
        {
            get => name;
            set => SetProperty(ref name, value);
        }

        // 时长
        private string duration;
        public string Duration
        {
            get => duration;
            set => SetProperty(ref duration, value);
        }

        // 音频编码
        public int AudioCodecId { get; set; }
        private string audioCodecName;
        public string AudioCodecName
        {
            get => audioCodecName;
            set => SetProperty(ref audioCodecName, value);
        }

        // 视频编码
        // "hev1.2.4.L156.90"
        // "avc1.640034"
        public string VideoCodecId { get; set; }

        // 视频编码名称，AVC、HEVC
        private string videoCodecName;
        public string VideoCodecName
        {
            get => videoCodecName;
            set => SetProperty(ref videoCodecName, value);
        }

        // 视频画质
        private Resolution resolution;
        public Resolution Resolution
        {
            get => resolution;
            set => SetProperty(ref resolution, value);
        }

        // 需要下载的内容
        public Dictionary<string, bool> NeedDownloadContent { get; private set; }

        // 正在下载内容（音频、视频、弹幕、字幕、封面）
        private string downloadContent;
        public string DownloadContent
        {
            get => downloadContent;
            set => SetProperty(ref downloadContent, value);
        }

        // 下载状态
        public DownloadStatus DownloadStatus { get; set; }

        // 下载状态显示
        private string downloadStatusTitle;
        public string DownloadStatusTitle
        {
            get => downloadStatusTitle;
            set => SetProperty(ref downloadStatusTitle, value);
        }

        // 下载进度
        private float progress;
        public float Progress
        {
            get => progress;
            set => SetProperty(ref progress, value);
        }

        //  已下载大小/文件大小
        private string downloadingFileSize;
        public string DownloadingFileSize
        {
            get => downloadingFileSize;
            set => SetProperty(ref downloadingFileSize, value);
        }

        // 下载的最高速度
        public long MaxSpeed { get; set; }

        //  下载速度
        private string speedDisplay;
        public string SpeedDisplay
        {
            get => speedDisplay;
            set => SetProperty(ref speedDisplay, value);
        }


        #region 控制按钮

        private VectorImage startOrPause;
        public VectorImage StartOrPause
        {
            get => startOrPause;
            set => SetProperty(ref startOrPause, value);
        }

        private VectorImage delete;
        public VectorImage Delete
        {
            get => delete;
            set => SetProperty(ref delete, value);
        }

        #endregion

        #region 命令申明

        // 下载列表暂停继续事件
        private DelegateCommand startOrPauseCommand;
        public DelegateCommand StartOrPauseCommand => startOrPauseCommand ?? (startOrPauseCommand = new DelegateCommand(ExecuteStartOrPauseCommand));

        /// <summary>
        /// 下载列表暂停继续事件
        /// </summary>
        private void ExecuteStartOrPauseCommand()
        {
            switch (DownloadStatus)
            {
                case DownloadStatus.NOT_STARTED:
                case DownloadStatus.WAIT_FOR_DOWNLOAD:
                    DownloadStatus = DownloadStatus.PAUSE_STARTED;
                    StartOrPause = ButtonIcon.Instance().Start;
                    StartOrPause.Fill = DictionaryResource.GetColor("ColorPrimary");
                    break;
                case DownloadStatus.PAUSE_STARTED:
                    DownloadStatus = DownloadStatus.WAIT_FOR_DOWNLOAD;
                    StartOrPause = ButtonIcon.Instance().Pause;
                    StartOrPause.Fill = DictionaryResource.GetColor("ColorPrimary");
                    break;
                case DownloadStatus.PAUSE:
                    DownloadStatus = DownloadStatus.DOWNLOADING;
                    StartOrPause = ButtonIcon.Instance().Pause;
                    StartOrPause.Fill = DictionaryResource.GetColor("ColorPrimary");
                    break;
                case DownloadStatus.DOWNLOADING:
                    DownloadStatus = DownloadStatus.PAUSE;
                    StartOrPause = ButtonIcon.Instance().Start;
                    StartOrPause.Fill = DictionaryResource.GetColor("ColorPrimary");
                    break;
                case DownloadStatus.DOWNLOAD_SUCCEED:
                    // 下载成功后会从下载列表中删除
                    // 不会出现此分支
                    break;
                case DownloadStatus.DOWNLOAD_FAILED:
                    DownloadStatus = DownloadStatus.WAIT_FOR_DOWNLOAD;
                    StartOrPause = ButtonIcon.Instance().Pause;
                    StartOrPause.Fill = DictionaryResource.GetColor("ColorPrimary");
                    break;
                default:
                    break;
            }
        }

        // 下载列表删除事件
        private DelegateCommand deleteCommand;
        public DelegateCommand DeleteCommand => deleteCommand ?? (deleteCommand = new DelegateCommand(ExecuteDeleteCommand));

        /// <summary>
        /// 下载列表删除事件
        /// </summary>
        private void ExecuteDeleteCommand()
        {
            App.DownloadingList.Remove(this);
        }

        #endregion

    }
}