⌚ duration

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.

Installation

go get -u github.com/peterhellberg/duration

Feel free to copy this package into your own codebase.

Usage

package main
import (
"fmt""github.com/peterhellberg/duration"
)
funcmain() {
ifd, err:=duration.Parse("P1DT30H4S"); err==nil {
fmt.Println(d) // Output: 54h0m4s
}
}

RFC3339 grammar for durations

 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)