1. 1
2. 2
3. 3
4. 4
5. 5
6. 6
7. 7
8. 8
9. 9
10. 10
11. 11
12. 12
13. 13
14. 14
15. 15
16. 16
17. 17
18. 18
19. 19
20. 20
21. 21
22. 22
23. 23
24. 24
25. 25
26. 26
27. 27
28. 28
29. 29
30. 30
31. 31
32. 32
33. 33
34. 34
35. 35
36. 36
37. 37
38. 38
39. 39
40. 40
41. 41
42. 42
43. 43
44. 44
45. 45
46. 46
47. 47
48. 48
49. 49
50. 50
51. 51
52. 52
53. 53
54. 54
55. 55
56. 56
57. 57
58. 58
59. 59
60. 60
61. 61
62. 62
63. 63
64. 64
65. 65
66. 66
67. 67
68. 68
69. 69
70. 70
71. 71
72. 72
73. 73
74. 74
75. 75
76. 76
77. 77
78. 78
79. 79
80. 80
81. 81
82. 82
83. 83
84. 84
85. 85
86. 86
87. 87
88. 88
89. 89
90. 90
91. 91
92. 92
93. 93
94. 94
95. 95
96. 96
97. 97
98. 98
99. 99
100. 100
101. 101
102. 102
103. 103
104. 104
105. 105
106. 106
107. 107
108. 108
109. 109

// Copyright 2025 Shota FUJI
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// SPDX-License-Identifier: Apache-2.0

namespace Plac {
public class Connection : GLib.Object {
	private ConnectionRaw conn;
	private GLib.Thread<void>? thread;
	private bool is_closed;

	public Connection(Discovery.Server server) {
		this.conn = new ConnectionRaw(server);
		this.thread = null;
		this.is_closed = false;
	}

	public signal void connection_started();
	public signal void out_of_memory_error();
	public signal void connection_error(ConnectionErrorEvent event);
	public signal void connected(ConnectedEvent event);
	public signal void zones_changed(Transport.ZoneListEvent event);

	public void activate() {
		if (thread != null) {
			return;
		}

		is_closed = false;

		thread = new GLib.Thread<void>("connection-loop", () => {
				GLib.Idle.add(() => {
					connection_started();
					return false;
				});

				while (true) {
					if (is_closed) {
						return;
					}

					var event = conn.get_event();

					if (event == null) {
						deactivate();
						GLib.Idle.add(() => {
							out_of_memory_error();
							return false;
						});
						return;
					}

					switch (event.kind) {
						case ERROR: {
							deactivate();
							GLib.Idle.add(() => {
								connection_error(event.get_connection_error_event());
								return false;
							});
							break;
						}
						case CONNECTED: {
							conn.subscribe_zones();
							GLib.Idle.add(() => {
								connected(event.get_connected_event());
								return false;
							});
							break;
						}
						case ZONE_LIST: {
							GLib.Idle.add(() => {
								zones_changed(event.get_zone_list_event());
								return false;
							});
							break;
						}
					}
				}
			});
	}

	public void deactivate() {
		if (thread == null) {
			return;
		}

		// Prevent unnecessary read immediately.
		is_closed = true;

		// Schedule thread disposal. Calling `thread.join` immediately results in
		// `join` from the same thread = deadlock.
		GLib.Idle.add(() => {
				thread.join();
				return false;
			});
	}
}
}