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package post
import (
"database/sql/driver"
"fmt"
"time"
)
// Date represents a calendar date with no timezone information attached.
type Date struct {
Year int
Month time.Month
Day int
}
// DateFromTime converts a Time into a Date, truncating all non-date
// information.
func DateFromTime(t time.Time) Date {
t = t.UTC()
return Date{
Year: t.Year(),
Month: t.Month(),
Day: t.Day(),
}
}
// ToTime converts a Date into a Time. The returned time will be UTC midnight of
// the Date.
func (d *Date) ToTime() time.Time {
return time.Date(d.Year, d.Month, d.Day, 0, 0, 0, 0, time.UTC)
}
// Scan implements the sql.Scanner interface.
func (d *Date) Scan(src interface{}) error {
if src == nil {
*d = Date{}
return nil
}
ts, ok := src.(int64)
if !ok {
return fmt.Errorf("cannot scan value %#v into Date", src)
}
*d = DateFromTime(time.Unix(ts, 0))
return nil
}
// Value implements the driver.Valuer interface.
func (d Date) Value() (driver.Value, error) {
if d == (Date{}) {
return nil, nil
}
return d.ToTime().Unix(), nil
}
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