Move card-controller out of utils.

src/card-controller/interaction-manager.ts

@@ -0,0 +1,50 @@
+import throttle from 'lodash-es/throttle';
+import { Timer } from '../utils/timer';
+import { CardInteractionAPI } from './types';
+
+export class InteractionManager {
+  protected _timer = new Timer();
+  protected _api: CardInteractionAPI;
+
+  constructor(api: CardInteractionAPI) {
+    this._api = api;
+  }
+
+  // The mouse handler may be called continually, throttle it to at most once
+  // per second for performance reasons.
+  public reportInteraction = throttle(() => {
+    this._reportInteraction();
+  }, 1 * 1000);
+
+  public hasInteraction(): boolean {
+    return this._timer.isRunning();
+  }
+
+  /**
+   * Start the user interaction ('screensaver') timer to reset the view to
+   * default `view.timeout_seconds` after user interaction.
+   */
+  protected _reportInteraction(): void {
+    this._timer.stop();
+
+    // Interactions reset the trigger state.
+    this._api.getTriggersManager().untrigger();
+
+    const timeoutSeconds = this._api.getConfigManager().getConfig()
+      ?.view.timeout_seconds;
+
+    if (timeoutSeconds) {
+      this._timer.start(timeoutSeconds, () => {
+        if (this._isAutomatedUpdateAllowed()) {
+          this._api.getViewManager().setViewDefault();
+          this._api.getStyleManager().setLightOrDarkMode();
+        }
+      });
+    }
+    this._api.getStyleManager().setLightOrDarkMode();
+  }
+
+  protected _isAutomatedUpdateAllowed(): boolean {
+    return !this._api.getTriggersManager().isTriggered();
+  }
+}