@bigfishtv/cockpit/src/utils/titleCase.js

/*
 * Title Caps
 *
 * Ported to JavaScript By John Resig - http://ejohn.org/ - 21 May 2008
 * Original by John Gruber - http://daringfireball.net/ - 10 May 2008
 * License: http://www.opensource.org/licenses/mit-license.php
 */

const small = '(a|an|and|as|at|but|by|en|for|if|in|of|on|or|the|to|v[.]?|via|vs[.]?)'
const punct = '([!"#$%&\'()*+,./:;<=>?@[\\\\\\]^_`{|}~-]*)'

/**
 * Takes string and returns a title-cased version of it, e.g. "cats and dogs" -> "Cats and Dogs"
 * @param  {String} title
 * @return {string}
 */
export default function titleCase(title) {
	var parts = [],
		split = /[:.;?!] |(?: |^)["Ò]/g,
		index = 0

	title = title.toLowerCase()

	while (true) {
		var m = split.exec(title)

		parts.push(
			title
				.substring(index, m ? m.index : title.length)
				.replace(/\b([A-Za-z][a-z.'Õ]*)\b/g, function(all) {
					return /[A-Za-z]\.[A-Za-z]/.test(all) ? all : upper(all)
				})
				.replace(RegExp('\\b' + small + '\\b', 'ig'), lower)
				.replace(RegExp('^' + punct + small + '\\b', 'ig'), function(all, punct, word) {
					return punct + upper(word)
				})
				.replace(RegExp('\\b' + small + punct + '$', 'ig'), upper)
		)

		index = split.lastIndex

		if (m) parts.push(m[0])
		else break
	}

	return parts
		.join('')
		.replace(/ V(s?)\. /gi, ' v$1. ')
		.replace(/(['Õ])S\b/gi, '$1s')
		.replace(/\b(AT&T|Q&A)\b/gi, function(all) {
			return all.toUpperCase()
		})
}

function lower(word) {
	return word.toLowerCase()
}

function upper(word) {
	return word.substr(0, 1).toUpperCase() + word.substr(1)
}