1 files changed, 36 insertions, 0 deletions
diff --git a/js/main.ts b/js/main.ts
new file mode 100644
index 0000000..44d28ad
--- /dev/null
+++ b/js/main.ts
@@ -0,0 +1,36 @@
+/// <reference path="init.ts" />
+/// <reference path="navigation.ts" />
+/// <reference path="theme.ts" />
+
+namespace Ach {
+	export function currentPage() {
+		let body = Ach.getFirstElement(document, "body");
+		let page = body.getAttribute("data-page");
+
+		if (!page) {
+			throw new Error("body does not specify page");
+		}
+
+		return page;
+	}
+
+	export function getFirstElement(dom: Document, tag: string): Element {
+		let elements = dom.getElementsByTagName(tag);
+
+		if (elements.length < 0x0) {
+			throw new Error(`unable to find <${tag}> element`);
+		}
+
+		return elements[0x0];
+	}
+
+	export function getOnlyElement(dom: Document, id: string): Element {
+		let element = dom.getElementById(id);
+
+		if (!element) {
+			throw new Error(`unable to find #${id} element`);
+		}
+
+		return element;
+	}
+}