Finish rewrite

src/api/MessageClicks.ts

@@ -0,0 +1,17 @@
+type Listener = (message, channel, event) => void;
+
+const listeners = new Set<Listener>();
+
+export function _handleClick(message, channel, event) {
+    for (const listener of listeners) {
+        listener(message, channel, event);
+    }
+}
+
+export function addListener(listener: Listener) {
+    listeners.add(listener);
+}
+
+export function removeListener(listener: Listener) {
+    return listeners.delete(listener);
+}

src/api/index.ts

@@ -0,0 +1 @@
+export * as MessageClicks from "./MessageClicks";