82 lines
1.5 KiB
Go
82 lines
1.5 KiB
Go
package topdata
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import (
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"html"
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"strings"
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"unicode"
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"golang.org/x/text/unicode/norm"
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)
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func slugifyWikiText(value string, fallback string) string {
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value = html.UnescapeString(strings.TrimSpace(value))
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var b strings.Builder
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lastDash := false
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for _, r := range norm.NFKD.String(strings.ToLower(value)) {
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transliterated := transliterateWikiSlugRune(r)
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switch {
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case r >= 'a' && r <= 'z':
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b.WriteRune(r)
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lastDash = false
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case r >= '0' && r <= '9':
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b.WriteRune(r)
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lastDash = false
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case unicode.Is(unicode.Mn, r):
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continue
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case isWikiSlugJoinerPunctuation(r):
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continue
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case transliterated != "":
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b.WriteString(transliterated)
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lastDash = false
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default:
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if b.Len() > 0 && !lastDash {
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b.WriteByte('-')
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lastDash = true
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}
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}
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}
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slug := strings.Trim(b.String(), "-")
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if slug == "" {
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return fallback
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}
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return slug
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}
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func isWikiSlugJoinerPunctuation(r rune) bool {
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switch r {
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case '\'', '"', '`', '´', '‘', '’', '‚', '‛', '“', '”', '„', '‟', '‹', '›', '«', '»', '′', '″', '＇', '＂':
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return true
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default:
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return false
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}
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}
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func transliterateWikiSlugRune(r rune) string {
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switch r {
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case 'æ':
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return "ae"
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case 'œ':
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return "oe"
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case 'ø':
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return "o"
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case 'ß':
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return "ss"
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case 'þ':
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return "th"
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case 'ð', 'đ':
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return "d"
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case 'ł':
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return "l"
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case 'ħ':
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return "h"
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case 'ı':
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return "i"
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case 'ŋ':
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return "n"
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case 'ŧ':
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return "t"
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default:
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return ""
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}
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}
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