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.Collections.Generic;
 7  using System.Text.Json.Nodes;
 8  using Microsoft.PowerToys.Settings.UI.Library;
 9  
10  namespace Microsoft.PowerToys.Settings.UI.Helpers
11  {
12      public class HotkeyConflictHelper
13      {
14          public delegate void HotkeyConflictCheckCallback(bool hasConflict, HotkeyConflictResponse conflicts);
15  
16          private static readonly Dictionary<string, HotkeyConflictCheckCallback> PendingHotkeyConflictChecks = new Dictionary<string, HotkeyConflictCheckCallback>();
17          private static readonly object LockObject = new object();
18  
19          public static void CheckHotkeyConflict(HotkeySettings hotkeySettings, Func<string, int> ipcMSGCallBackFunc, HotkeyConflictCheckCallback callback)
20          {
21              if (hotkeySettings == null || ipcMSGCallBackFunc == null)
22              {
23                  return;
24              }
25  
26              string requestId = GenerateRequestId();
27  
28              lock (LockObject)
29              {
30                  PendingHotkeyConflictChecks[requestId] = callback;
31              }
32  
33              var hotkeyObj = new JsonObject
34              {
35                  ["request_id"] = requestId,
36                  ["win"] = hotkeySettings.Win,
37                  ["ctrl"] = hotkeySettings.Ctrl,
38                  ["shift"] = hotkeySettings.Shift,
39                  ["alt"] = hotkeySettings.Alt,
40                  ["key"] = hotkeySettings.Code,
41              };
42  
43              var requestObject = new JsonObject
44              {
45                  ["check_hotkey_conflict"] = hotkeyObj,
46              };
47  
48              ipcMSGCallBackFunc(requestObject.ToString());
49          }
50  
51          public static void HandleHotkeyConflictResponse(HotkeyConflictResponse response)
52          {
53              if (response.AllConflicts.Count == 0)
54              {
55                  return;
56              }
57  
58              HotkeyConflictCheckCallback callback = null;
59  
60              lock (LockObject)
61              {
62                  if (PendingHotkeyConflictChecks.TryGetValue(response.RequestId, out callback))
63                  {
64                      PendingHotkeyConflictChecks.Remove(response.RequestId);
65                  }
66              }
67  
68              callback?.Invoke(response.HasConflict, response);
69          }
70  
71          private static string GenerateRequestId() => Guid.NewGuid().ToString();
72      }
73  }