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)