// set page title
window.page_title = "Computer Science Blog | Matthew Grove";

function nextPage() {
	// if there are more slides to come, display the next one
	if (window.current_blog_page < window.pages.length) {
		displayPage(window.pages[window.current_blog_page + 1]);
	} else {
		// if end of presentation has been reached, display the first slide
		displayPage(window.pages[0]);
	}
}

function previousPage() {
	// if there are more slides before the current one, display the previous slide
	if (window.current_blog_page >= 1) {
		displayPage(window.pages[window.current_blog_page - 1]);
	} else {
		// if end of presentation has been reached, display the first slide
		displayPage(window.pages[window.pages.length - 1]);
	}
}

function displayPage(page) {
	// document.getElementById("iframe").src = "pages/" + page + ".html";
	$("#presentation").load(page);
}

window.onload = function() {
	// set the current date
    var date = new Date();

    // ternary operator: if the date < 10 then add 0 to the start of it, else display the date
    var day = date.getDate() < 10 ? "0" + date.getDate() : date.getDate();

	// set current date
    var current_date = day + "-" + (date.getMonth() + 1) + "-" + date.getFullYear();

	// display date
    $("#current_date").html(current_date);

	// define variables for blog pages
	pages = ["pages/page_1.html"];
	var page_exists = true;
	var page_number = 1;
	// gets all blog pages and add them to an array (pages[])
	pages.forEach(function(item, index) {
		if (index == 0) {
			$(".carousel-inner").append('<div class="item active"><iframe src="' + item + '"></iframe></div>');
			$(".carousel-indicators").append('<li data-target="#presentation" class="active" data-slide-to="' + index + '"></li>')
		} else {
			$(".carousel-inner").append('<div class="item"><iframe src="' + item + '"></iframe></div>');
			$(".carousel-indicators").append('<li data-target="#presentation" data-slide-to="' + index + '"></li>')
		}
	});

	// displays first blog page
	window.current_blog_page = 0;
	$("#blog-insert").load("pages/blog.html");
}