package davextra

import (
	"regexp"
)

// GetLinkFragment returns the longest alphanumeric string from a link
func GetLinkFragment(link string) string {
	re := regexp.MustCompile(`\w+`)
	matches := re.FindAllString(link, -1) // Returns all matches
	var longestMatch string
	for _, match := range matches {
		if len(match) > len(longestMatch) {
			longestMatch = match
		}
	}
	return longestMatch[:4]
}