Function plain

src/renderers/plain.js:15–46

(req, res, arg)

 * @returns {string} The plain text representation
 */
export function plain (req, res, arg) {
	// Handle primitive types directly
	if (arg === null || arg === undefined) {
		return arg.toString();
	}

	// Check cache for objects we've already processed
	if (typeof arg === "object" && plainCache.has(arg)) {
		return plainCache.get(arg);
	}

	let result;

	if (Array.isArray(arg)) {
		result = arg.map(i => plain(req, res, i)).join(COMMA);
	} else if (arg instanceof Date) {
		result = arg.toISOString();
	} else if (typeof arg === "function") {
		result = arg.toString();
	} else if (arg instanceof Object) {
		result = JSON.stringify(arg, null, indent(req.headers.accept, req.server.json));
	} else {
		result = arg.toString();
	}

	// Cache the result for objects
	if (typeof arg === "object" && arg !== null) {
		plainCache.set(arg, result);
	}

	return result;
}