paginationGenerator.js

const getInRangedValue = function(value, min, max) {
	return value < min ? min : value > max ? max : value;
}
const pagination = function(current, visible, total) {
	const middle = Math.ceil(visible / 2);
	let startPage = current - middle + 1, endPage = startPage + visible;
	startPage = getInRangedValue(startPage, 1, total - visible + 1);
	endPage = getInRangedValue(endPage, visible, total);
	let pages = [];
	for(let i = startPage; i <= endPage && pages.length < visible; i++) {
		pages.push(i);
	}
	return pages;
}