github.com/elliott5/community@v0.14.1-0.20160709191136-823126fb026a/wordsmith/utility/slug.go (about)

     1  // Copyright 2016 Documize Inc. <legal@documize.com>. All rights reserved.
     2  //
     3  // This software (Documize Community Edition) is licensed under 
     4  // GNU AGPL v3 http://www.gnu.org/licenses/agpl-3.0.en.html
     5  //
     6  // You can operate outside the AGPL restrictions by purchasing
     7  // Documize Enterprise Edition and obtaining a commercial license
     8  // by contacting <sales@documize.com>. 
     9  //
    10  // https://documize.com
    11  
    12  package utility
    13  
    14  import (
    15  	"strings"
    16  	"unicode"
    17  )
    18  
    19  // MakeSlug creates a slug, suitable for use in a URL, from a string
    20  func MakeSlug(str string) string {
    21  	slg := strings.Map(
    22  		func(r rune) rune { // individual mapping of runes into a format suitable for use in a URL
    23  			r = unicode.ToLower(r)
    24  			if unicode.IsLower(r) || unicode.IsDigit(r) {
    25  				return r
    26  			}
    27  			return '-'
    28  		}, str)
    29  	slg = strings.NewReplacer("---", "-", "--", "-").Replace(slg)
    30  	for strings.HasSuffix(slg, "-") {
    31  		slg = strings.TrimSuffix(slg, "-")
    32  	}
    33  	for strings.HasPrefix(slg, "-") {
    34  		slg = strings.TrimPrefix(slg, "-")
    35  	}
    36  	return slg
    37  }