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
110. 110
111. 111
112. 112
113. 113
114. 114
115. 115
116. 116
117. 117
118. 118
119. 119
120. 120
121. 121
122. 122
123. 123
124. 124
125. 125
126. 126
127. 127

// 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

const std = @import("std");

const moo = @import("moo");

pub const TransportService = struct {
    pub const id = "com.roonlabs.transport:2";

    pub const PlaybackState = enum {
        playing,
        paused,
        loading,
        stopped,

        pub fn jsonParseFromValue(
            _: std.mem.Allocator,
            value: std.json.Value,
            _: std.json.ParseOptions,
        ) std.json.ParseFromValueError!@This() {
            return switch (value) {
                .string => |v| {
                    inline for (@typeInfo(@This()).@"enum".fields) |field| {
                        if (std.mem.eql(u8, field.name, v)) {
                            return @enumFromInt(field.value);
                        }
                    }

                    return std.json.ParseFromValueError.InvalidEnumTag;
                },
                else => std.json.ParseFromValueError.UnexpectedToken,
            };
        }
    };

    pub const Zone = struct {
        zone_id: []const u8,
        display_name: []const u8,
        state: PlaybackState,
        is_next_allowed: bool = false,
        is_previous_allowed: bool = false,
        is_pause_allowed: bool = false,
        is_play_allowed: bool = false,
        is_seek_allowed: bool = false,
    };

    pub const SubscribeZoneChanges = struct {
        pub const Request = struct {
            subscription_key: []const u8,
        };

        pub fn request(allocator: std.mem.Allocator, request_id: i64, subscription_id: u64) ![]u8 {
            const meta = moo.Metadata{
                .service = id ++ "/subscribe_zones",
                .verb = "REQUEST",
            };

            var sub_id_buf: [std.fmt.count("{}", .{std.math.maxInt(u64)})]u8 = undefined;
            var sub_id_fbs = std.io.fixedBufferStream(&sub_id_buf);
            try std.fmt.format(sub_id_fbs.writer(), "{}", .{subscription_id});

            const body = moo.JsonBody(Request).init(&.{
                .subscription_key = sub_id_fbs.getWritten(),
            });
            const header = body.getHeader(request_id);

            const buf = try allocator.alloc(
                u8,
                meta.getEncodeSize() + header.getEncodeSize() + body.getEncodeSize(),
            );
            errdefer allocator.free(buf);

            var fbs = std.io.fixedBufferStream(buf);
            try moo.encode(fbs.writer(), meta, header, body);

            return buf;
        }

        pub const InitialResponse = struct {
            zones: []const Zone,
        };

        pub fn initialResponse(
            allocator: std.mem.Allocator,
            header_ctx: moo.HeaderParsingContext,
            message: []const u8,
        ) !moo.JsonBody(InitialResponse) {
            _, const body_ctx = try moo.WellKnownHeaders.parse(message, header_ctx);
            return try moo.JsonBody(InitialResponse).parse(allocator, message, body_ctx, .{
                .ignore_unknown_fields = true,
                .allocate = .alloc_always,
            });
        }

        pub const Response = struct {
            zones_removed: []const []const u8 = &.{},
            zones_added: []const Zone = &.{},
            zones_changed: []const Zone = &.{},
        };

        pub fn response(
            allocator: std.mem.Allocator,
            header_ctx: moo.HeaderParsingContext,
            message: []const u8,
        ) !moo.JsonBody(Response) {
            _, const body_ctx = try moo.WellKnownHeaders.parse(message, header_ctx);
            return try moo.JsonBody(Response).parse(allocator, message, body_ctx, .{
                .ignore_unknown_fields = true,
                .allocate = .alloc_always,
            });
        }
    };
};