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

use std::ops::Deref;
use std::time::Duration;

use google_cloud_googleapis::spanner::v1::transaction_options::read_only::TimestampBound as InternalTimestampBound;
use google_cloud_googleapis::spanner::v1::transaction_options::ReadOnly;

/// https://cloud.google.com/spanner/docs/storing-numeric-data#precision_of_numeric_types
/// -99999999999999999999999999999.999999999～99999999999999999999999999999.999999999
/// TODO https://github.com/paupino/rust-decimal/issues/135
#[derive(Debug, Clone, Eq, PartialEq)]
#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))]
pub struct SpannerNumeric(String);

impl Default for SpannerNumeric {
    fn default() -> Self {
        Self::new("0")
    }
}

impl SpannerNumeric {
    pub fn new(value: impl Into<String>) -> Self {
        Self(value.into())
    }

    pub fn as_str(&self) -> &str {
        self.0.as_str()
    }
}

#[derive(Clone, PartialEq, Eq)]
pub struct Timestamp {
    /// Represents seconds of UTC time since Unix epoch
    /// 1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to
    /// 9999-12-31T23:59:59Z inclusive.
    pub seconds: i64,
    /// Non-negative fractions of a second at nanosecond resolution. Negative
    /// second values with fractions must still have non-negative nanos values
    /// that count forward in time. Must be from 0 to 999,999,999
    /// inclusive.
    pub nanos: i32,
}

impl From<Timestamp> for prost_types::Timestamp {
    fn from(t: Timestamp) -> Self {
        prost_types::Timestamp {
            seconds: t.seconds,
            nanos: t.nanos,
        }
    }
}

impl From<prost_types::Timestamp> for Timestamp {
    fn from(t: prost_types::Timestamp) -> Self {
        Timestamp {
            seconds: t.seconds,
            nanos: t.nanos,
        }
    }
}

#[derive(PartialEq, Eq, PartialOrd, Ord, Copy, Clone)]
pub struct CommitTimestamp {
    pub(crate) timestamp: time::OffsetDateTime,
}

impl CommitTimestamp {
    pub fn new() -> Self {
        Self::default()
    }
}

impl Default for CommitTimestamp {
    fn default() -> Self {
        CommitTimestamp {
            timestamp: time::OffsetDateTime::UNIX_EPOCH,
        }
    }
}

impl Deref for CommitTimestamp {
    type Target = time::OffsetDateTime;

    fn deref(&self) -> &Self::Target {
        &self.timestamp
    }
}

impl From<CommitTimestamp> for time::OffsetDateTime {
    fn from(s: CommitTimestamp) -> Self {
        s.timestamp
    }
}

#[derive(Clone)]
pub struct TimestampBound {
    inner: InternalTimestampBound,
}

impl TimestampBound {
    pub fn strong_read() -> Self {
        TimestampBound {
            inner: InternalTimestampBound::Strong(true),
        }
    }
    pub fn exact_staleness(d: Duration) -> Self {
        TimestampBound {
            inner: InternalTimestampBound::ExactStaleness(d.try_into().unwrap()),
        }
    }
    pub fn max_staleness(d: Duration) -> Self {
        TimestampBound {
            inner: InternalTimestampBound::MaxStaleness(d.try_into().unwrap()),
        }
    }
    pub fn min_read_timestamp(t: Timestamp) -> Self {
        TimestampBound {
            inner: InternalTimestampBound::MinReadTimestamp(t.into()),
        }
    }
    pub fn read_timestamp(t: Timestamp) -> Self {
        TimestampBound {
            inner: InternalTimestampBound::ReadTimestamp(t.into()),
        }
    }
}

impl From<TimestampBound> for ReadOnly {
    fn from(tb: TimestampBound) -> Self {
        ReadOnly {
            return_read_timestamp: true,
            timestamp_bound: Some(tb.inner),
        }
    }
}