From eeda4c62fcfd188de68a30b03eb799c000e35bb7 Mon Sep 17 00:00:00 2001
From: David Tsay <david.e.tsay@nasa.gov>
Date: Wed, 17 Apr 2024 10:46:34 -0700
Subject: [PATCH] forgot to push useTimeSystem

---
 .../timeConductor/ConductorComponent.vue      |  1 +
 src/plugins/timeConductor/useTimeSystem.js    | 47 +++++++++++++++++++
 2 files changed, 48 insertions(+)
 create mode 100644 src/plugins/timeConductor/useTimeSystem.js

diff --git a/src/plugins/timeConductor/ConductorComponent.vue b/src/plugins/timeConductor/ConductorComponent.vue
index 7c0ae34149..46ffe5bcf6 100644
--- a/src/plugins/timeConductor/ConductorComponent.vue
+++ b/src/plugins/timeConductor/ConductorComponent.vue
@@ -92,6 +92,7 @@ import ConductorPopUp from './ConductorPopUp.vue';
 import conductorPopUpManager from './conductorPopUpManager.js';
 import ConductorTimeSystem from './ConductorTimeSystem.vue';
 import { useTimeSystem } from './useTimeSystem.js';
+
 const DEFAULT_DURATION_FORMATTER = 'duration';
 
 export default {
diff --git a/src/plugins/timeConductor/useTimeSystem.js b/src/plugins/timeConductor/useTimeSystem.js
new file mode 100644
index 0000000000..e52b623461
--- /dev/null
+++ b/src/plugins/timeConductor/useTimeSystem.js
@@ -0,0 +1,47 @@
+/*****************************************************************************
+ * Open MCT Web, Copyright (c) 2014-2024, United States Government
+ * as represented by the Administrator of the National Aeronautics and Space
+ * Administration. All rights reserved.
+ *
+ * Open MCT Web is licensed under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * http://www.apache.org/licenses/LICENSE-2.0.
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ * Open MCT Web includes source code licensed under additional open source
+ * licenses. See the Open Source Licenses file (LICENSES.md) included with
+ * this source code distribution or the Licensing information page available
+ * at runtime from the About dialog for additional information.
+ *****************************************************************************/
+
+import { onBeforeUnmount, ref } from 'vue';
+
+export function useTimeSystem(openmct, options) {
+  let stopObservingTimeSystem;
+
+  const currentTimeSystem = openmct.time.getTimeSystem();
+
+  const timeSystemKey = ref(currentTimeSystem.key);
+
+  onBeforeUnmount(() => stopObservingTimeSystem?.());
+
+  function observeTimeSystem() {
+    openmct.time.on('timeSystemChanged', updateTimeSystem);
+    stopObservingTimeSystem = () => openmct.time.off('timeSystem', updateTimeSystem);
+  }
+
+  function updateTimeSystem(timeSystem) {
+    timeSystemKey.value = timeSystem.key;
+  }
+
+  return {
+    observeTimeSystem,
+    timeSystemKey
+  };
+}