lib/reporters/callback.js

/**
 * @module pete/lib/reporters/callback
 */
module.exports = createCaller;

/**
 * Create and return report function that will call back once all reports are gathered.
 *
 * @alias module:pete/lib/reporters/callback
 * @param {object}   [options]
 * @param {Function} [options.out]   function to call back with array of reports
 * @return {module:pete/lib/getReporters~report}
 */
function createCaller (options) {
	var out = (options && options.out) || console.log;
	var index = 0;
	var reports = [];

	if (typeof out !== 'function') {
		out = console.log;
	}

	return function caller (err, report) {
		if (index < 0) {
			console.error(new Error('Callback reporter called after it was closed'));
			return;
		}

		if (!err && !report) {
			out(reports);
			reports = [];
			index = -1;
			return;
		}

		index++;

		reports.push(report);
	};
}