/* Hyperlink.js / Jared McGuire */

document.observe('dom:loaded', function() {
	ScanForExternalLinks();
	ScanForEmailLinks();
});

// Scans for external links and updates the target to a new window.
// <a href="http://digitalev.com">Website</a>  ==>  <a href="http://digitalev.com" target="_blank" class="externalLink">Website</a>
function ScanForExternalLinks() {
	var domain = document.domain.replace("www.", "");
	var httpRegEx = new RegExp("^http(s)?://", "i");
	var domainRegEx = new RegExp("^http(s)?://((.*)\.)?" + domain.replace(".", "\."), "i");
	$A(document.getElementsByTagName("a")).each(function(link) {
	    if ((httpRegEx.test(link.href) == true) && (domainRegEx.test(link.href) == false) && (link.rel == "")) {
	        if (link.className.startsWith('noExternalLink') == false) {
	            if ((isDomainConsideredExternal(link.href) == true) && (link.href != "http://www.google.com/intl/en-US_US/help/terms_maps.html") && (link.href.startsWith("http://google.com/maps?") == false)) {
	                link.target = "_blank";
	                link.className = "externalLink";
	                var emptySpan = document.createElement('span');
	                emptySpan.className = "icon";
	                link.appendChild(emptySpan);
	            }
	        }
	    }
	});
}

function isDomainConsideredExternal(linkUrl) {
	var linkUrlWithoutProtocol = linkUrl.replace(/http:\/\//g, "");
	linkUrlWithoutProtocol = linkUrlWithoutProtocol.replace(/https:\/\//g, "");

	var domainSeparatorIndex = linkUrlWithoutProtocol.indexOf(".");
	if (domainSeparatorIndex  > 0) {
		var testDomain = linkUrlWithoutProtocol.substring(domainSeparatorIndex + 1);
		if (testDomain.startsWith("opkansas.org") == false) {
			return true;
		}
	}
	return false;
}

// Scans for pseudo email links and updates to real email links.
// <a href="#email:mcguirej#digitalev.com"></a>  ==>  <a href="mailto:mcguirej@digitalev.com" class="emailLink">mcguirej@digitalev.com</a>
function ScanForEmailLinks() {
	var domain = document.domain.replace("www.", "");
	var emailRegEx = new RegExp("^#?email:", "i");
	$A(document.getElementsByTagName("a")).each(function(link) {
		var href = link.href.replace(document.location, "");
		if (emailRegEx.test(href) == true) {
			var email = href.replace(emailRegEx, "").replace("#", "@");
			link.innerHTML = email;
			link.href = "mailto:" + email;
			link.className = "emailLink";
		}
	});
}