Added replacement.js

common/replacement.js

@@ -0,0 +1,60 @@
+//replacement(options)(key [, args...])
+//options - the json object containing all options
+//key - one of the keys in options
+//data (optional) - a number of arguments that are substituted into the resulting string
+const replacement = (options) => (key, ...data) => {
+	let result;
+
+	//randomize arrays
+	if (Array.isArray(options[key])) {
+		result = options[key][Math.floor(Math.random() * options[key].length)];
+	} else {
+		result = options[key];
+	}
+
+	//handle no result
+	if (result === undefined) {
+		const noResult = options["noResult"];
+		if (noResult === undefined) {
+			return ""; //nothing at all to show
+		}
+		//randomized noResult array
+		if (Array.isArray(noResult)) {
+			result = noResult[Math.floor(Math.random() * noResult.length)];
+		} else {
+			result = noResult;
+ 		 }
+	}
+
+	//replacement engine
+	let counter = 0;
+	data.map((dat) => {
+		counter++;
+		result = result.replace(/\{([1-9][0-9]*)\}/g, a => a === "{" + counter + "}" ? dat : a);
+	});
+
+	//return the final result
+	return result;
+};
+
+//templateReplacement(templateString [, args...])
+//templateString - the string to act as a template
+//data (optional) - a number of arguments that are substituted into the template string
+const stringReplacement = (templateString, ...data) => {
+	let result = templateString;
+
+	//replacement engine
+	let counter = 0;
+	data.map((dat) => {
+		counter++;
+		result = result.replace(/\{([1-9][0-9]*)\}/g, a => a === "{" + counter + "}" ? dat : a);
+	});
+
+	//return the final result
+	return result;
+}
+
+module.exports = {
+	replacement: replacement,
+	stringReplacement: stringReplacement
+};