package davextra

import (
	"fmt"
	"path/filepath"
	"regexp"
	"strings"
)

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]
}

func InsertLinkFragment(filename, dupeID string) string {
	ext := filepath.Ext(filename)
	name := strings.TrimSuffix(filename, ext)
	return fmt.Sprintf("%s DMM%s%s", name, dupeID, ext)
}