feat: Initial clean release of CHM

packages/lib/string-utils-common.js

@@ -0,0 +1,59 @@
+// Leave this file as JavaScript -- our current TypeScript configuration
+// generates code that tries to access modules/exports, which is incompatible
+// with browser environments.
+
+function pregQuote(str, delimiter = '') {
+	return (`${str}`).replace(new RegExp(`[.\\\\+*?\\[\\^\\]$(){}=!<>|:\\${delimiter || ''}-]`, 'g'), '\\$&');
+}
+
+function replaceRegexDiacritics(regexString) {
+	if (!regexString) return '';
+
+	const diacriticReplacements = {
+		a: '[aàáâãäåāą]',
+		A: '[AÀÁÂÃÄÅĀĄ]',
+		c: '[cçćč]',
+		C: '[CÇĆČ]',
+		d: '[dđď]',
+		D: '[DĐĎ]',
+		e: '[eèéêëěēę]',
+		E: '[EÈÉÊËĚĒĘ]',
+		i: '[iìíîïī]',
+		I: '[IÌÍÎÏĪ]',
+		l: '[lł]',
+		L: '[LŁ]',
+		n: '[nñňń]',
+		N: '[NÑŇŃ]',
+		o: '[oòóôõöøō]',
+		O: '[OÒÓÔÕÖØŌ]',
+		r: '[rř]',
+		R: '[RŘ]',
+		s: '[sšś]',
+		S: '[SŠŚ]',
+		t: '[tť]',
+		T: '[TŤ]',
+		u: '[uùúûüůū]',
+		U: '[UÙÚÛÜŮŪ]',
+		y: '[yÿý]',
+		Y: '[YŸÝ]',
+		z: '[zžżź]',
+		Z: '[ZŽŻŹ]',
+	};
+
+	let output = '';
+	for (let i = 0; i < regexString.length; i++) {
+		const c = regexString[i];
+		const r = diacriticReplacements[c];
+		if (r) {
+			output += r;
+		} else {
+			output += c;
+		}
+	}
+
+	return output;
+}
+
+if (typeof module !== 'undefined') {
+	module.exports = { pregQuote, replaceRegexDiacritics };
+}