PoC userscript for a “Guess Punctuation” button, based on @kellnerd’s bookmarklet

mb-guess-punctuation.user.js

// ==UserScript==
// @name        Guess Punctuation
// @namespace   Violentmonkey Scripts
// @match       https://*.musicbrainz.org/release/*/edit
// @grant       none
// @version     1.0
// @author      ROpdebee
// @description 03/02/2021, 22:18:56
// ==/UserScript==

// Credits for the guess punctuation functionality to kellnerd @ https://community.metabrainz.org/t/bookmarklet-to-guess-unicode-punctuation-of-titles/517356
(() => {
/**
 * Transforms the values of the selected input fields using the given substitution rules.
 * @param {string} inputSelector CSS selector of the input fields.
 * @param {(string|RegExp)[][]} substitutionRules Pairs of values for search & replace.
 */
function transformInputValues(inputSelector, substitutionRules) {
	$(inputSelector).css('background-color', ''); // disable possible previously highlighted changes
	$(inputSelector).each((_index, input) => {
		let value = input.value;
		substitutionRules.forEach(([searchValue, newValue]) => {
			value = value.replace(searchValue, newValue);
			console.debug(value);
		});
		if (value != input.value) { // update and highlight changed values
			$(input).val(value)
				.css('background-color', 'yellow');
		}
	});
}

const transformationRules = [
		[/(?<=\W|^)"(.+?)"(?=\W|$)/g, '“$1”'], // double quoted text
		[/(?<=\W|^)'(.+?)'(?=\W|$)/g, '‘$1’'], // single quoted text
		// ... which is enclosed by non-word characters or at the beginning/end of the title
		[/(\d+)"/g, '$1″'], // double primes, e.g. for 12″
		[/(\d+)'(\d+)/g, '$1′$2'], // single primes, e.g. for 3′42″ but not for 70’s
		[/'/g, '’'], // ... and finally the apostrophes should be remaining
		[/(?<!\.)\.{3}(?!\.)/g, '…'], // horizontal ellipsis (but not more than three dots)
		[/ - /g, ' – '], // en dash as separator
		[/(\d+)-(\d+)/g, '$1–$2'], // en dash for ranges where it means "to", e.g. 1965–1972
		[/-/g, '‐'], // ... and finally the hyphens should be remaining
		// difficult to find rules for: em dash (rare), minus (very rare), figure dash (very rare)
		// TODO: localize quotes using release/lyrics language
	];

$(document).ready(() => {
  let btn = document.createElement('button');
  btn.innerText = 'Guess Punctuation';
  $(btn).click((e) => {
    e.preventDefault();
    transformInputValues('input.track-name', transformationRules);
  });
  $('.guesscase .buttons').append(btn)
})
})()