sql-query/lib/Helpers.js

NodeJS SQL query builder

// Transforms:
// "name LIKE ? AND age > ?", ["John", 23]
// into:
// "name LIKE 'John' AND age > 23"
module.exports.escapeQuery = function (Dialect, query, args) {
	var pos = 0;

	return query.replace(/\?{1,2}/g, function (match) {
		if (match == '?') {
			return Dialect.escapeVal(args[pos++]);
		} else if (match == '??') {
			return Dialect.escapeId(args[pos++]);
		}
	});
}

module.exports.dateToString = function (date, timeZone, opts) {
	var dt = new Date(date);

	if (timeZone != 'local') {
		var tz = convertTimezone(timeZone);

		dt.setTime(dt.getTime() + (dt.getTimezoneOffset() * 60000));
		if (tz !== false) {
			dt.setTime(dt.getTime() + (tz * 60000));
		}
	}

	var year   = dt.getFullYear();
	var month  = zeroPad(dt.getMonth() + 1);
	var day    = zeroPad(dt.getDate());
	var hour   = zeroPad(dt.getHours());
	var minute = zeroPad(dt.getMinutes());
	var second = zeroPad(dt.getSeconds());
	var milli  = zeroPad(dt.getMilliseconds(), 3);

	if (opts.dialect == 'mysql' || timeZone == 'local') {
		return year + '-' + month + '-' + day + ' ' + hour + ':' + minute + ':' + second + '.' + milli;
	} else {
		return year + '-' + month + '-' + day + 'T' + hour + ':' + minute + ':' + second + '.' + milli + 'Z';
	}
}

function zeroPad(number, n) {
	if (arguments.length == 1) n = 2;

	number = "" + number;

	while (number.length < n) {
		number = "0" + number;
	}
	return number;
}

function convertTimezone(tz) {
	if (tz == "Z") return 0;

	var m = tz.match(/([\+\-\s])(\d\d):?(\d\d)?/);
	if (m) {
		return (m[1] == '-' ? -1 : 1) * (parseInt(m[2], 10) + ((m[3] ? parseInt(m[3], 10) : 0) / 60)) * 60;
	}
	return false;
}