Added a check for a missing switch value in localStorage

I added a check to see if the blockSwitch value has been set in localStorage and set it to the first value found in the HTML file if not.

block-switch/src/main/resources/blockSwitch.js

@@ -0,0 +1,68 @@
+function addBlockSwitches() {
+	$('.primary').each(function() {
+		primary = $(this);
+		createSwitchItem(primary, createBlockSwitch(primary));
+		primary.children('.title').remove();
+	});
+	$('.secondary').each(function(idx, node) {
+		secondary = $(node);
+		primary = findPrimary(secondary);
+		switchItem = createSwitchItem(secondary, primary.children('.switch'));
+		switchItem.content.addClass('hidden');
+		findPrimary(secondary).append(switchItem.content);
+		secondary.remove();
+	});
+	if (window.localStorage.getItem("blockSwitch") === null) {
+		window.localStorage.setItem("blockSwitch", $( "div.primary" ).find("div.switch--item").first().text())
+	}
+	$(".switch--item:contains(" + window.localStorage.getItem("blockSwitch") +")").addClass("selected");
+}
+
+function createBlockSwitch(primary) {
+	blockSwitch = $('<div class="switch"></div>');
+	primary.prepend(blockSwitch);
+	return blockSwitch;
+}
+
+function findPrimary(secondary) {
+	candidate = secondary.prev();
+	while (!candidate.is('.primary')) {
+		candidate = candidate.prev();
+	}
+	return candidate;
+}
+
+function createSwitchItem(block, blockSwitch) {
+	blockName = block.children('.title').text();
+	content = block.children('.content').first().append(block.next('.colist'));
+	item = $('<div class="switch--item">' + blockName + '</div>');
+	item.on('click', '', content, function(e) {
+		$(this).addClass('selected');
+		$(this).siblings().removeClass('selected');
+		e.data.siblings('.content').addClass('hidden');
+		e.data.removeClass('hidden');
+	});
+	blockSwitch.append(item);
+	return {'item': item, 'content': content};
+}
+
+function globalSwitch() {
+	$('.switch--item').each(function() {
+		$(this).off('click');
+		$(this).on('click', function() {
+			window.localStorage.setItem("blockSwitch", $(this).text());
+			selectedText = $(this).text()
+			selectedIndex = $(this).index()
+			$(".switch--item").filter(function() { return ($(this).text() === selectedText) }).each(function() {
+				$(this).addClass('selected');
+				$(this).siblings().removeClass('selected');
+				selectedContent = $(this).parent().siblings(".content").eq(selectedIndex)
+				selectedContent.removeClass('hidden');
+				selectedContent.siblings().addClass('hidden');
+			});
+		});
+	});
+}
+
+$(addBlockSwitches);
+$(globalSwitch);