BililiveRecorder/BililiveRecorder.WPF/WorkDirectoryWindow.xaml.cs

using Microsoft.WindowsAPICodePack.Dialogs;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.IO;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Threading;
using System.Windows;
using System.Windows.Media;

namespace BililiveRecorder.WPF
{
    /// <summary>
    /// WorkDirectoryWindow.xaml 的交互逻辑
    /// </summary>
    public partial class WorkDirectoryWindow : Window, INotifyPropertyChanged
    {
        public static readonly SolidColorBrush Red = new SolidColorBrush(Color.FromArgb(0xFF, 0xF7, 0x1B, 0x1B));
        public static readonly SolidColorBrush Green = new SolidColorBrush(Color.FromArgb(0xFF, 0x0B, 0xB4, 0x22));

        private Mutex mutex;

        public WorkDirectoryWindow()
        {
            DataContext = this;
            InitializeComponent();
            PropertyChanged += WorkDirectoryWindow_PropertyChanged;
            //DialogResult = false;
        }

        private void WorkDirectoryWindow_PropertyChanged(object sender, PropertyChangedEventArgs e)
        {
            if (e.PropertyName == nameof(Status))
            {
                if (Status)
                {
                    StatusColor = Green;
                }
                else
                {
                    StatusColor = Red;
                }
            }
            else if (e.PropertyName == nameof(WorkPath))
            {
                CheckPath();
            }
        }

        private void CheckPath()
        {
            string c = WorkPath;
            string config = Path.Combine(c, "config.json");
            bool result = false;

            if (!Directory.Exists(c))
            {
                StatusText = "目录不存在";
                result = false;
            }
            else if (!Directory.EnumerateFiles(c).Any())
            {
                StatusText = "可用的空文件夹";
                result = true;
            }
            else if (!File.Exists(config))
            {
                StatusText = "此文件夹已有其他文件";
                result = false;
            }
            else
            {
                try
                {
                    JObject j = JObject.Parse(File.ReadAllText(config));
                    if (j["version"] == null || j["data"] == null)
                    {
                        StatusText = "配置文件损坏";
                        result = false;
                    }
                    else
                    {
                        StatusText = "录播姬曾经使用过的目录";
                        result = true;
                    }
                }
                catch (Exception)
                {
                    StatusText = "配置文件不可读";
                    result = false;
                }
            }

            if (!result)
            {
                Status = false;
            }
            else
            {
                if (mutex != null)
                {
                    try
                    {
                        mutex.ReleaseMutex();
                    }
                    catch (Exception)
                    { }
                    finally
                    {
                        mutex.Dispose();
                        mutex = null;
                    }
                }
                try
                {
                    mutex = new Mutex(true, @"Global\BililiveRecorder.WPF.." + c.GetHashCode(), out bool createdNew);
                    if (createdNew)
                    {
                        Status = true;
                    }
                    else
                    {
                        Status = false;
                        StatusText = "已有录播姬在此文件夹运行";
                    }
                }
                catch (Exception)
                {
                    Status = false;
                    StatusText = "检查录播姬运行状态时出错";
                }
            }
        }

        private string _workPath;
        public string WorkPath { get => _workPath; set => SetField(ref _workPath, value.TrimEnd('/', '\\')); }

        private string _statusText = "请选择目录";
        public string StatusText { get => _statusText; set => SetField(ref _statusText, value); }

        private SolidColorBrush _statusColor = Red;
        public SolidColorBrush StatusColor { get => _statusColor; set => SetField(ref _statusColor, value); }

        private bool _status;
        public bool Status { get => _status; set => SetField(ref _status, value); }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            var fileDialog = new CommonOpenFileDialog()
            {
                IsFolderPicker = true,
                Multiselect = false,
                Title = "选择录播姬工作目录路径",
                AddToMostRecentlyUsedList = false,
                EnsurePathExists = true,
                NavigateToShortcut = true,
                InitialDirectory = WorkPath,
            };
            if (fileDialog.ShowDialog(this) == CommonFileDialogResult.Ok)
            {
                WorkPath = fileDialog.FileName;
            }
        }

        public event PropertyChangedEventHandler PropertyChanged;
        protected virtual void OnPropertyChanged(string propertyName) => PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        protected bool SetField<T>(ref T field, T value, [CallerMemberName] string propertyName = "")
        {
            if (EqualityComparer<T>.Default.Equals(field, value)) { return false; }
            field = value; OnPropertyChanged(propertyName); return true;
        }

        private void Button_Click_1(object sender, RoutedEventArgs e)
        {
            GC.KeepAlive(mutex);
            DialogResult = true;
            Close();
        }

        private void Button_Click_2(object sender, RoutedEventArgs e)
        {
            Close();
        }
    }
}