format.go

package main

import (
	"regexp"
	"strings"
)

func Format(s string) string {

	camel := regexp.MustCompile(`([a-z])([A-Z])`)
	spaces := regexp.MustCompile(`(\s+-\s+|\s+)`)
	quotes := regexp.MustCompile(`('|")`)
	parentheses := regexp.MustCompile(`(\(|\)|{|})`)
	accentsA := regexp.MustCompile(`(ã|á|à)`)
	accentsE := regexp.MustCompile(`(é|è)`)
	accentsI := regexp.MustCompile(`(í|ì)`)
	accentsO := regexp.MustCompile(`(ó|ò)`)
	accentsU := regexp.MustCompile(`(ú|ù)`)
	accentsN := regexp.MustCompile(`(ñ)`)
	accentsC := regexp.MustCompile(`(ç|ć)`)
	other := regexp.MustCompile(`(,|;|:|<|>|\?|!|@|#|\$|%|\^|\*|\+|=|~)`)
	multidashes := regexp.MustCompile(`(--+|__+)`)
	trailingDashes := regexp.MustCompile(`(^-|-$)`)

	s = strings.ToValidUTF8(s, "")
	s = strings.TrimSpace(s)
	s = quotes.ReplaceAllString(s, "")
	s = accentsA.ReplaceAllString(s, "a")
	s = accentsE.ReplaceAllString(s, "e")
	s = accentsI.ReplaceAllString(s, "i")
	s = accentsO.ReplaceAllString(s, "o")
	s = accentsU.ReplaceAllString(s, "u")
	s = accentsN.ReplaceAllString(s, "n")
	s = accentsC.ReplaceAllString(s, "c")
	s = parentheses.ReplaceAllString(s, "-")
	s = other.ReplaceAllString(s, "-")
	s = trailingDashes.ReplaceAllString(s, "")
	s = camel.ReplaceAllString(s, "$1-$2")
	s = spaces.ReplaceAllString(s, "-")
	s = strings.ReplaceAll(s, "_", "-")
	s = strings.ReplaceAll(s, "-.", ".")
	s = strings.ReplaceAll(s, ".-", "-")
	s = strings.ReplaceAll(s, "..", ".")
	s = multidashes.ReplaceAllString(s, "-")
	s = strings.ToLower(s)

	return s

}