tags.go
No OneTemporary
Actions

Size

1 KB

Subscribers

None

tags.go
View Options

	package category

	import (
	"strings"
	"unicode"
	)

	// titleFromHashtag generates an all-lowercase title, with spaces inserted based on initial capitalization -- e.g.
	// "MyWordyTag" becomes "my wordy tag".
	func titleFromHashtag(hashtag string) string {
	var t strings.Builder
	var prev rune
	for i, c := range hashtag {
	if unicode.IsUpper(c) {
	if i > 0 && !unicode.IsUpper(prev) {
	// Insert space if previous rune wasn't also uppercase (e.g. an abbreviation)
	t.WriteRune(' ')
	}
	t.WriteRune(unicode.ToLower(c))
	} else {
	t.WriteRune(c)
	}
	prev = c
	}
	return t.String()
	}

	// HashtagFromTitle generates a valid single-word, camelCase hashtag from a title (which might include spaces,
	// punctuation, etc.).
	func HashtagFromTitle(title string) string {
	var t strings.Builder
	var prev rune
	for _, c := range title {
	if !unicode.IsLetter(c) && !unicode.IsNumber(c) {
	prev = c
	continue
	}
	if unicode.IsSpace(prev) {
	// Uppercase next word
	t.WriteRune(unicode.ToUpper(c))
	} else {
	t.WriteRune(c)
	}
	prev = c
	}
	return t.String()
	}