github.com/drone/go-convert@v0.0.0-20240307072510-6bd371c65e61/internal/slug/slug.go (about)

     1  // Copyright 2022 Harness, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  // Package slug provides utilities for working with slug values.
    16  package slug
    17  
    18  import (
    19  	"strings"
    20  	"unicode"
    21  
    22  	"golang.org/x/text/unicode/norm"
    23  )
    24  
    25  var safeRanges = []*unicode.RangeTable{
    26  	unicode.Letter,
    27  	unicode.Number,
    28  }
    29  
    30  func safe(r rune) rune {
    31  	switch {
    32  	case unicode.IsOneOf(safeRanges, r):
    33  		return unicode.ToLower(r)
    34  	}
    35  	return -1
    36  }
    37  
    38  // Create creates a slug from a string.
    39  func Create(s string) string {
    40  	s = norm.NFKD.String(s)
    41  	s = strings.Map(safe, s)
    42  	return s
    43  }