Parse a RFC3339 duration string into time.Duration
There are probably a few unsupported edge cases still to be fixed, please help me find them :)
The following constants are used to do the calculations for longer durations:
HoursPerDay = 24.0
HoursPerWeek = 168.0
HoursPerMonth = 730.4841667
HoursPerYear = 8765.81
Look in the test for examples of both valid and invalid duration strings.
go get -u github.com/peterhellberg/duration
Feel free to copy this package into your own codebase.
package main
import (
"fmt"
"github.com/peterhellberg/duration"
)
func main() {
if d, err := duration.Parse("P1DT30H4S"); err == nil {
fmt.Println(d) // Output: 54h0m4s
}
} dur-second = 1*DIGIT "S"
dur-minute = 1*DIGIT "M" [dur-second]
dur-hour = 1*DIGIT "H" [dur-minute]
dur-time = "T" (dur-hour / dur-minute / dur-second)
dur-day = 1*DIGIT "D"
dur-week = 1*DIGIT "W"
dur-month = 1*DIGIT "M" [dur-day]
dur-year = 1*DIGIT "Y" [dur-month]
dur-date = (dur-day / dur-month / dur-year) [dur-time]
duration = "P" (dur-date / dur-time / dur-week)