1 files changed, 75 insertions, 0 deletions
diff --git a/browser/components/newtab/lib/SystemTickFeed.jsm b/browser/components/newtab/lib/SystemTickFeed.jsm
new file mode 100644
index 0000000000..d55cedc45d
--- /dev/null
+++ b/browser/components/newtab/lib/SystemTickFeed.jsm
@@ -0,0 +1,75 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+const { actionTypes: at } = ChromeUtils.importESModule(
+  "resource://activity-stream/common/Actions.sys.mjs"
+);
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  clearInterval: "resource://gre/modules/Timer.sys.mjs",
+  setInterval: "resource://gre/modules/Timer.sys.mjs",
+});
+
+// Frequency at which SYSTEM_TICK events are fired
+const SYSTEM_TICK_INTERVAL = 5 * 60 * 1000;
+
+class SystemTickFeed {
+  init() {
+    this._idleService = Cc["@mozilla.org/widget/useridleservice;1"].getService(
+      Ci.nsIUserIdleService
+    );
+    this._hasObserver = false;
+    this.setTimer();
+  }
+
+  setTimer() {
+    this.intervalId = lazy.setInterval(() => {
+      if (this._idleService.idleTime > SYSTEM_TICK_INTERVAL) {
+        this.cancelTimer();
+        Services.obs.addObserver(this, "user-interaction-active");
+        this._hasObserver = true;
+        return;
+      }
+      this.dispatchTick();
+    }, SYSTEM_TICK_INTERVAL);
+  }
+
+  cancelTimer() {
+    lazy.clearInterval(this.intervalId);
+    this.intervalId = null;
+  }
+
+  observe() {
+    this.dispatchTick();
+    Services.obs.removeObserver(this, "user-interaction-active");
+    this._hasObserver = false;
+    this.setTimer();
+  }
+
+  dispatchTick() {
+    ChromeUtils.idleDispatch(() =>
+      this.store.dispatch({ type: at.SYSTEM_TICK })
+    );
+  }
+
+  onAction(action) {
+    switch (action.type) {
+      case at.INIT:
+        this.init();
+        break;
+      case at.UNINIT:
+        this.cancelTimer();
+        if (this._hasObserver) {
+          Services.obs.removeObserver(this, "user-interaction-active");
+          this._hasObserver = false;
+        }
+        break;
+    }
+  }
+}
+
+const EXPORTED_SYMBOLS = ["SystemTickFeed", "SYSTEM_TICK_INTERVAL"];