solutaaliquid/src/Escaper.js

common utils for javascript. Utils to get the global scope (browser, webworker & co.). Customizable string escaper. Utilitize for objects. Extension at base javascript api (usefull extention like String.hashcode()).

// required to build the internal escape filter for regex
const REGEXCHARMAP = ["\\","?","[", "]", "{", "}", "(", ")", ".", "^", "$"]
	.map(char => { 
		return {f: new RegExp("\\" +char, "g"), v : "\\" + char};
	});


const mapping = (aText, theFilters) => {
	let text = aText;
	theFilters.forEach(item => {
		text = text.replace(item.f, item.v);
	});
	return text;
};

const buildUnescapeList = (aCharMap, isCaseSensitiv) => {
	const option = isCaseSensitiv ? "mg" : "mgi"; 
	return aCharMap.map(item => {
		if(!item.at || item.at == "unescape")
			return {f: new RegExp(mapping(item.escaped, REGEXCHARMAP), option), v: item.char}
	}).filter(item => !!item);
};

const buildEscapeList = (aCharMap, isCaseSensitiv) => {
	const option = isCaseSensitiv ? "mg" : "mgi"; 
	return aCharMap.map(item => {
		if(!item.at || item.at == "escape")
			return {f: new RegExp(mapping(item.char,REGEXCHARMAP), option), v: item.escaped}
	}).filter(item => !!item);
};
class Escaper {
	constructor(escapeMap, isCaseSensitiv){
		this.escapeMap = buildEscapeList(escapeMap, isCaseSensitiv)
		this.unescapeMap = buildUnescapeList(escapeMap, isCaseSensitiv)
	}
	
	escape(aText){
		return mapping(aText, this.escapeMap);
	}
	
	unescape(aText){
		return mapping(aText, this.unescapeMap);
	}
	
	static REGEXP_ESCAPER(){
		return new Escaper([
			{char: "\\", escaped : "\\\\"},
			{char: "?", escaped : "\\?"},
			{char: "[", escaped : "\\["},
			{char: "]", escaped : "\\]"},
			{char: "{", escaped : "\\{"},
			{char: "}", escaped : "\\}"},
			{char: "(", escaped : "\\("},
			{char: ")", escaped : "\\)"},
			{char: ".", escaped : "\\."},
			{char: "^", escaped : "\\^"},
			{char: "$", escaped : "\\$"}
		]);
	}
}

export default Escaper;