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

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

use chrono::{DateTime, TimeZone, Utc};

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

#[derive(Clone, PartialEq)]
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 {
        return prost_types::Timestamp {
            seconds: t.seconds,
            nanos: t.nanos,
        };
    }
}

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

#[derive(PartialEq, Eq, PartialOrd, Ord, Copy, Clone)]
pub struct CommitTimestamp {
    pub(crate) timestamp: DateTime<Utc>,
}

impl CommitTimestamp {
    pub fn new() -> Self {
        CommitTimestamp {
            timestamp: Utc.timestamp(0, 0),
        }
    }
}

impl Deref for CommitTimestamp {
    type Target = DateTime<Utc>;

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

impl From<CommitTimestamp> for DateTime<Utc> {
    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.into()),
        }
    }
    pub fn max_staleness(d: Duration) -> Self {
        TimestampBound {
            inner: InternalTimestampBound::MaxStaleness(d.into()),
        }
    }
    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),
        }
    }
}