first commit

common/resources/client/ui/toast/toast-timer.ts

@@ -0,0 +1,25 @@
+export class ToastTimer {
+  private timerId?: ReturnType<typeof setTimeout>;
+  private createdAt: number = 0;
+
+  constructor(private callback: () => void, private remaining: number) {
+    this.resume();
+  }
+
+  pause() {
+    clearTimeout(this.timerId);
+    this.remaining -= Date.now() - this.createdAt;
+  }
+
+  resume() {
+    this.createdAt = Date.now();
+    if (this.timerId) {
+      clearTimeout(this.timerId);
+    }
+    this.timerId = setTimeout(this.callback, this.remaining);
+  }
+
+  clear() {
+    clearTimeout(this.timerId);
+  }
+}