go-chart/util/time.go
2018-10-11 17:18:46 -07:00

100 lines
1.9 KiB
Go

package util
import "time"
var (
// Time contains time utility functions.
Time = timeUtil{}
)
type timeUtil struct{}
// Millis returns the duration as milliseconds.
func (tu timeUtil) Millis(d time.Duration) float64 {
return float64(d) / float64(time.Millisecond)
}
// TimeToFloat64 returns a float64 representation of a time.
func (tu timeUtil) ToFloat64(t time.Time) float64 {
return float64(t.UnixNano())
}
// Float64ToTime returns a time from a float64.
func (tu timeUtil) FromFloat64(tf float64) time.Time {
return time.Unix(0, int64(tf))
}
func (tu timeUtil) DiffDays(t1, t2 time.Time) (days int) {
t1n := t1.Unix()
t2n := t2.Unix()
var diff int64
if t1n > t2n {
diff = t1n - t2n //yields seconds
} else {
diff = t2n - t1n //yields seconds
}
return int(diff / (_secondsPerDay))
}
func (tu timeUtil) DiffHours(t1, t2 time.Time) (hours int) {
t1n := t1.Unix()
t2n := t2.Unix()
var diff int64
if t1n > t2n {
diff = t1n - t2n
} else {
diff = t2n - t1n
}
return int(diff / (_secondsPerHour))
}
// Start returns the earliest (min) time in a list of times.
func (tu timeUtil) Start(times ...time.Time) time.Time {
if len(times) == 0 {
return time.Time{}
}
start := times[0]
for _, t := range times[1:] {
if t.Before(start) {
start = t
}
}
return start
}
// Start returns the earliest (min) time in a list of times.
func (tu timeUtil) End(times ...time.Time) time.Time {
if len(times) == 0 {
return time.Time{}
}
end := times[0]
for _, t := range times[1:] {
if t.After(end) {
end = t
}
}
return end
}
// StartAndEnd returns the start and end of a given set of time in one pass.
func (tu timeUtil) StartAndEnd(values ...time.Time) (start time.Time, end time.Time) {
if len(values) == 0 {
return
}
start = values[0]
end = values[0]
for _, v := range values[1:] {
if end.Before(v) {
end = v
}
if start.After(v) {
start = v
}
}
return
}