matc 0.1.3

Matter protocol library (controller side)
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184

// Helper functions for extracting typed values from serde_json::Value objects
// used by the generated encode_command_json functions.

use anyhow;

pub fn get_u8(args: &serde_json::Value, name: &str) -> anyhow::Result<u8> {
    args.get(name)
        .and_then(|v| v.as_u64())
        .map(|n| n as u8)
        .ok_or_else(|| anyhow::anyhow!("missing or invalid field: {}", name))
}

pub fn get_u16(args: &serde_json::Value, name: &str) -> anyhow::Result<u16> {
    args.get(name)
        .and_then(|v| v.as_u64())
        .map(|n| n as u16)
        .ok_or_else(|| anyhow::anyhow!("missing or invalid field: {}", name))
}

pub fn get_u32(args: &serde_json::Value, name: &str) -> anyhow::Result<u32> {
    args.get(name)
        .and_then(|v| v.as_u64())
        .map(|n| n as u32)
        .ok_or_else(|| anyhow::anyhow!("missing or invalid field: {}", name))
}

pub fn get_u64(args: &serde_json::Value, name: &str) -> anyhow::Result<u64> {
    args.get(name)
        .and_then(|v| v.as_u64())
        .ok_or_else(|| anyhow::anyhow!("missing or invalid field: {}", name))
}

pub fn get_i8(args: &serde_json::Value, name: &str) -> anyhow::Result<i8> {
    args.get(name)
        .and_then(|v| v.as_i64())
        .map(|n| n as i8)
        .ok_or_else(|| anyhow::anyhow!("missing or invalid field: {}", name))
}

pub fn get_i16(args: &serde_json::Value, name: &str) -> anyhow::Result<i16> {
    args.get(name)
        .and_then(|v| v.as_i64())
        .map(|n| n as i16)
        .ok_or_else(|| anyhow::anyhow!("missing or invalid field: {}", name))
}

pub fn get_i32(args: &serde_json::Value, name: &str) -> anyhow::Result<i32> {
    args.get(name)
        .and_then(|v| v.as_i64())
        .map(|n| n as i32)
        .ok_or_else(|| anyhow::anyhow!("missing or invalid field: {}", name))
}

pub fn get_i64(args: &serde_json::Value, name: &str) -> anyhow::Result<i64> {
    args.get(name)
        .and_then(|v| v.as_i64())
        .ok_or_else(|| anyhow::anyhow!("missing or invalid field: {}", name))
}

pub fn get_bool(args: &serde_json::Value, name: &str) -> anyhow::Result<bool> {
    args.get(name)
        .and_then(|v| v.as_bool())
        .ok_or_else(|| anyhow::anyhow!("missing or invalid field: {}", name))
}

pub fn get_string(args: &serde_json::Value, name: &str) -> anyhow::Result<String> {
    args.get(name)
        .and_then(|v| v.as_str())
        .map(|s| s.to_string())
        .ok_or_else(|| anyhow::anyhow!("missing or invalid field: {}", name))
}

// Accepts a hex string and decodes it to bytes.
pub fn get_octstr(args: &serde_json::Value, name: &str) -> anyhow::Result<Vec<u8>> {
    let s = args.get(name)
        .and_then(|v| v.as_str())
        .ok_or_else(|| anyhow::anyhow!("missing or invalid field: {}", name))?;
    let s = s.replace(' ', "");
    hex::decode(&s).map_err(|e| anyhow::anyhow!("field {}: invalid hex: {}", name, e))
}

// Optional variants - return None when the field is absent or null.
pub fn get_opt_u8(args: &serde_json::Value, name: &str) -> anyhow::Result<Option<u8>> {
    match args.get(name) {
        None | Some(serde_json::Value::Null) => Ok(None),
        Some(v) => v.as_u64()
            .map(|n| Some(n as u8))
            .ok_or_else(|| anyhow::anyhow!("invalid field: {}", name)),
    }
}

pub fn get_opt_u16(args: &serde_json::Value, name: &str) -> anyhow::Result<Option<u16>> {
    match args.get(name) {
        None | Some(serde_json::Value::Null) => Ok(None),
        Some(v) => v.as_u64()
            .map(|n| Some(n as u16))
            .ok_or_else(|| anyhow::anyhow!("invalid field: {}", name)),
    }
}

pub fn get_opt_u32(args: &serde_json::Value, name: &str) -> anyhow::Result<Option<u32>> {
    match args.get(name) {
        None | Some(serde_json::Value::Null) => Ok(None),
        Some(v) => v.as_u64()
            .map(|n| Some(n as u32))
            .ok_or_else(|| anyhow::anyhow!("invalid field: {}", name)),
    }
}

pub fn get_opt_u64(args: &serde_json::Value, name: &str) -> anyhow::Result<Option<u64>> {
    match args.get(name) {
        None | Some(serde_json::Value::Null) => Ok(None),
        Some(v) => v.as_u64()
            .map(Some)
            .ok_or_else(|| anyhow::anyhow!("invalid field: {}", name)),
    }
}

pub fn get_opt_i8(args: &serde_json::Value, name: &str) -> anyhow::Result<Option<i8>> {
    match args.get(name) {
        None | Some(serde_json::Value::Null) => Ok(None),
        Some(v) => v.as_i64()
            .map(|n| Some(n as i8))
            .ok_or_else(|| anyhow::anyhow!("invalid field: {}", name)),
    }
}

pub fn get_opt_i16(args: &serde_json::Value, name: &str) -> anyhow::Result<Option<i16>> {
    match args.get(name) {
        None | Some(serde_json::Value::Null) => Ok(None),
        Some(v) => v.as_i64()
            .map(|n| Some(n as i16))
            .ok_or_else(|| anyhow::anyhow!("invalid field: {}", name)),
    }
}

pub fn get_opt_i32(args: &serde_json::Value, name: &str) -> anyhow::Result<Option<i32>> {
    match args.get(name) {
        None | Some(serde_json::Value::Null) => Ok(None),
        Some(v) => v.as_i64()
            .map(|n| Some(n as i32))
            .ok_or_else(|| anyhow::anyhow!("invalid field: {}", name)),
    }
}

pub fn get_opt_i64(args: &serde_json::Value, name: &str) -> anyhow::Result<Option<i64>> {
    match args.get(name) {
        None | Some(serde_json::Value::Null) => Ok(None),
        Some(v) => v.as_i64()
            .map(Some)
            .ok_or_else(|| anyhow::anyhow!("invalid field: {}", name)),
    }
}

pub fn get_opt_bool(args: &serde_json::Value, name: &str) -> anyhow::Result<Option<bool>> {
    match args.get(name) {
        None | Some(serde_json::Value::Null) => Ok(None),
        Some(v) => v.as_bool()
            .map(Some)
            .ok_or_else(|| anyhow::anyhow!("invalid field: {}", name)),
    }
}

pub fn get_opt_string(args: &serde_json::Value, name: &str) -> anyhow::Result<Option<String>> {
    match args.get(name) {
        None | Some(serde_json::Value::Null) => Ok(None),
        Some(v) => v.as_str()
            .map(|s| Some(s.to_string()))
            .ok_or_else(|| anyhow::anyhow!("invalid field: {}", name)),
    }
}

pub fn get_opt_octstr(args: &serde_json::Value, name: &str) -> anyhow::Result<Option<Vec<u8>>> {
    match args.get(name) {
        None | Some(serde_json::Value::Null) => Ok(None),
        Some(v) => {
            let s = v.as_str().ok_or_else(|| anyhow::anyhow!("invalid field: {}", name))?;
            let s = s.replace(' ', "");
            hex::decode(&s)
                .map(Some)
                .map_err(|e| anyhow::anyhow!("field {}: invalid hex: {}", name, e))
        }
    }
}