photoprism/pkg/clean/duration.go

48 lines
679 B
Go
Raw Normal View History

package clean
import "strings"
var durationRunes = map[rune]bool{
':': true,
'-': true,
'd': true,
'h': true,
'm': true,
's': true,
'n': true,
'µ': true,
}
// Duration removes non-duration characters from a string and returns the result.
func Duration(s string) string {
if s == "" {
return ""
}
valid := false
skipDot := false
// Remove invalid characters.
s = strings.Map(func(r rune) rune {
if !skipDot && (r == ',' || r == '.') {
skipDot = true
return '.'
} else if durationRunes[r] {
skipDot = false
return r
} else if r < '0' || r > '9' {
return -1
}
valid = true
return r
}, s)
if !valid {
return ""
}
return s
}