Convert JS value into Lua representation

JS value to Lua.js

/**
 * Convert JS value into Lua representation
 * @author github.com/amekusa
 */
function parse(data, depth = 0) {
	switch (typeof data) {
	case 'object':
		if (!data) return 'nil';
		depth++;
		let indent = '  '.repeat(depth);
		let r = '{\n';
		if (Array.isArray(data)) {
			for (let i = 0; i < data.length; i++) {
				r += `${indent}${parse(data[i], depth)},\n`;
			}
		} else {
			let keys = Object.keys(data);
			for (let i = 0; i < keys.length; i++) {
				let k = keys[i];
				r += `${indent}${k} = ${parse(data[k], depth)},\n`;
			}
		}
		return r + indent.substring(0, 2 * (depth - 1)) + '}';
	case 'string':
		return `'${data}'`;
	case 'boolean':
		return data ? 'true' : 'false';
	default:
		return `${data}`;
	}
}