1  // Copyright (c) Microsoft Corporation
  2  // The Microsoft Corporation licenses this file to you under the MIT license.
  3  // See the LICENSE file in the project root for more information.
  4  
  5  using System;
  6  using System.ComponentModel.Composition;
  7  using System.IO;
  8  using System.IO.Abstractions;
  9  using System.Threading;
 10  
 11  using ManagedCommon;
 12  using Microsoft.PowerToys.Settings.UI.Library;
 13  using Microsoft.PowerToys.Settings.UI.Library.Utilities;
 14  
 15  namespace PowerOCR.Settings
 16  {
 17      [Export(typeof(IUserSettings))]
 18      public class UserSettings : IUserSettings
 19      {
 20          private readonly SettingsUtils _settingsUtils;
 21          private const string PowerOcrModuleName = "TextExtractor";
 22          private const string DefaultActivationShortcut = "Win + Shift + O";
 23          private const int MaxNumberOfRetry = 5;
 24          private const int SettingsReadOnChangeDelayInMs = 300;
 25  
 26          private readonly IFileSystemWatcher _watcher;
 27          private readonly Lock _loadingSettingsLock = new();
 28  
 29          [ImportingConstructor]
 30          public UserSettings(Helpers.IThrottledActionInvoker throttledActionInvoker)
 31          {
 32              _settingsUtils = SettingsUtils.Default;
 33              ActivationShortcut = new SettingItem<string>(DefaultActivationShortcut);
 34              PreferredLanguage = new SettingItem<string>(string.Empty);
 35  
 36              LoadSettingsFromJson();
 37  
 38              // delay loading settings on change by some time to avoid file in use exception
 39              _watcher = Helper.GetFileWatcher(PowerOcrModuleName, "settings.json", () => throttledActionInvoker.ScheduleAction(LoadSettingsFromJson, SettingsReadOnChangeDelayInMs));
 40          }
 41  
 42          public SettingItem<string> ActivationShortcut { get; private set; }
 43  
 44          public SettingItem<string> PreferredLanguage { get; private set; }
 45  
 46          private void LoadSettingsFromJson()
 47          {
 48              // TODO this IO call should by Async, update GetFileWatcher helper to support async
 49              lock (_loadingSettingsLock)
 50              {
 51                  {
 52                      var retry = true;
 53                      var retryCount = 0;
 54  
 55                      while (retry)
 56                      {
 57                          try
 58                          {
 59                              retryCount++;
 60  
 61                              if (!_settingsUtils.SettingsExists(PowerOcrModuleName))
 62                              {
 63                                  Logger.LogInfo("TextExtractor settings.json was missing, creating a new one");
 64                                  var defaultPowerOcrSettings = new PowerOcrSettings();
 65                                  defaultPowerOcrSettings.Save(_settingsUtils);
 66                              }
 67  
 68                              var settings = _settingsUtils.GetSettingsOrDefault<PowerOcrSettings>(PowerOcrModuleName);
 69                              if (settings != null)
 70                              {
 71                                  ActivationShortcut.Value = settings.Properties.ActivationShortcut.ToString();
 72                                  PreferredLanguage.Value = settings.Properties.PreferredLanguage.ToString();
 73                              }
 74  
 75                              retry = false;
 76                          }
 77                          catch (IOException ex)
 78                          {
 79                              if (retryCount > MaxNumberOfRetry)
 80                              {
 81                                  retry = false;
 82                              }
 83  
 84                              Logger.LogError("Failed to read changed settings", ex);
 85                              Thread.Sleep(500);
 86                          }
 87                          catch (Exception ex)
 88                          {
 89                              if (retryCount > MaxNumberOfRetry)
 90                              {
 91                                  retry = false;
 92                              }
 93  
 94                              Logger.LogError("Failed to read changed settings", ex);
 95                              Thread.Sleep(500);
 96                          }
 97                      }
 98                  }
 99              }
100          }
101  
102          public void SendSettingsTelemetry()
103          {
104              Logger.LogInfo("Sending settings telemetry");
105              var settings = _settingsUtils.GetSettingsOrDefault<PowerOcrSettings>(PowerOcrModuleName);
106              var properties = settings?.Properties;
107              if (properties == null)
108              {
109                  Logger.LogError("Failed to send settings telemetry");
110                  return;
111              }
112  
113              // TODO: Send Telemetry when settings change
114              // var telemetrySettings = new Telemetry.PowerOcrSettings(properties.VisibleColorFormats)
115              // {
116              //     ActivationShortcut = properties.ActivationShortcut.ToString(),
117              //     ActivationBehavior = properties.ActivationAction.ToString(),
118              //     ColorFormatForClipboard = properties.CopiedColorRepresentation.ToString(),
119              //     ShowColorName = properties.ShowColorName,
120              // };
121              //
122              // PowerToysTelemetry.Log.WriteEvent(telemetrySettings);
123          }
124      }
125  }