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

use crate::*;

use generic_array::typenum::{marker_traits::Unsigned, U16};
use generic_array::GenericArray;
use std::fmt;
use base58::ToBase58;

// unique id in const info
#[derive(Clone, Eq, PartialEq)]
pub struct UniqueId(GenericArray<u8, U16>);

impl std::fmt::Debug for UniqueId {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "UniqueId: {}", self.0.as_slice().to_base58())
    }
}

impl std::fmt::Display for UniqueId {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "{}", self.0.as_slice().to_base58())
    }
}

impl From<GenericArray<u8, U16>> for UniqueId {
    fn from(hash: GenericArray<u8, U16>) -> Self {
        Self(hash)
    }
}

impl From<UniqueId> for GenericArray<u8, U16> {
    fn from(hash: UniqueId) -> Self {
        hash.0
    }
}

impl AsRef<GenericArray<u8, U16>> for UniqueId {
    fn as_ref(&self) -> &GenericArray<u8, U16> {
        &self.0
    }
}

impl Default for UniqueId {
    fn default() -> Self {
        Self(GenericArray::default())
    }
}

impl UniqueId {
    pub fn as_slice(&self) -> &[u8] {
        self.0.as_slice()
    }

    pub fn as_mut_slice(&mut self) -> &mut [u8] {
        self.0.as_mut_slice()
    }

    pub fn clone_from_slice(slice: &[u8]) -> Self {
        UniqueId(GenericArray::clone_from_slice(slice))
    }

    pub fn create(slice: &[u8]) -> Self {
        let mut unique_slice = [0u8; 16];
        let mut count = 0;
        for c in slice {
            unique_slice[count] = *c;
            count += 1;
            if count >= 16 {
                break;
            }
        }

        UniqueId::clone_from_slice(&unique_slice)
    }

    // 从源计算hash256，然后取前16bytes做uniqueId
    pub fn create_with_hash(src: &[u8]) -> Self {
        use sha2::Digest;

        let mut sha256 = sha2::Sha256::new();
        sha256.input(src);
        Self::create(&sha256.result())
    }
}

impl RawFixedBytes for UniqueId {
    fn raw_bytes() -> Option<usize> {
        Some(U16::to_usize())
    }
}

impl RawEncode for UniqueId {
    fn raw_measure(&self, _purpose: &Option<RawEncodePurpose>) -> Result<usize, BuckyError> {
        Ok(U16::to_usize())
    }

    fn raw_encode<'a>(
        &self,
        buf: &'a mut [u8],
        _purpose: &Option<RawEncodePurpose>,
    ) -> Result<&'a mut [u8], BuckyError> {
        let bytes = Self::raw_bytes().unwrap();
        if buf.len() < bytes {
            let msg = format!(
                "not enough buffer for encode UniqueId, except={}, got={}",
                bytes,
                buf.len()
            );
            error!("{}", msg);

            return Err(BuckyError::new(BuckyErrorCode::OutOfLimit, msg));
        }
        unsafe {
            std::ptr::copy(self.0.as_slice().as_ptr(), buf.as_mut_ptr(), bytes);
        }

        Ok(&mut buf[bytes..])
    }
}

impl<'de> RawDecode<'de> for UniqueId {
    fn raw_decode(buf: &'de [u8]) -> Result<(Self, &'de [u8]), BuckyError> {
        let bytes = Self::raw_bytes().unwrap();
        if buf.len() < bytes {
            let msg = format!(
                "not enough buffer for decode UniqueId, except={}, got={}",
                bytes,
                buf.len()
            );
            error!("{}", msg);

            return Err(BuckyError::new(BuckyErrorCode::OutOfLimit, msg));
        }
        let mut _id = Self::default();
        unsafe {
            std::ptr::copy(buf.as_ptr(), _id.0.as_mut_slice().as_mut_ptr(), bytes);
        }
        Ok((_id, &buf[bytes..]))
    }
}

impl ProtobufTransform<&UniqueId> for Vec<u8> {
    fn transform(value: &UniqueId) -> BuckyResult<Self> {
        Ok(Vec::from(value.0.as_slice()))
    }
}

impl ProtobufTransform<Vec<u8>> for UniqueId {
    fn transform(value: Vec<u8>) -> BuckyResult<Self> {
        if value.len() != 32 {
            return Err(BuckyError::new(
                BuckyErrorCode::InvalidParam,
                format!(
                    "try convert from vec<u8> to named unique id failed, invalid len {}",
                    value.len()
                ),
            ));
        }
        let mut id = Self::default();
        unsafe {
            std::ptr::copy(value.as_ptr(), id.as_mut_slice().as_mut_ptr(), value.len());
        }

        Ok(id)
    }
}