export function now() {
	var d = new Date()
	var year = d.getFullYear()
	var month = change(d.getMonth() + 1)
	var day = change(d.getDate())
	var hour = change(d.getHours())
	var minute = change(d.getMinutes())
	var second = change(d.getSeconds())
	function change(t) {
		if (t < 10) {
			return '0' + t
		} else {
			return t
		}
	}
	return year + '-' + month + '-' + day + ' ' + hour + ':' + minute + ':' + second
}

export function timeFormat(time) {
	function getTimeStr(val) {
		return val < 10 ? '0' + val : val
	}

	if (Number.isInteger(time)) {
		let hour = 0; let minute = 0; let second = 0
		if (time) {
			if (time >= 3600) {
				hour = Math.floor(time / 3600) % 24
				time = (time % 3600)
			}
			if (time >= 60) {
				minute = Math.floor(time / 60)
				time = time % 60
			}
			second = Math.floor(time)
		}

		return getTimeStr(hour) + ':' + getTimeStr(minute) + ':' + getTimeStr(second)
	} else {
		return ''
	}
}

export function prefixIntrger(num, length) {
	return (Array(length).join('0') + num).slice(-length)
}