1 files changed, 60 insertions, 0 deletions
diff --git a/apps/system/js/storage.js b/apps/system/js/storage.js
new file mode 100644
index 0000000..ff7b10e
--- /dev/null
+++ b/apps/system/js/storage.js
@@ -0,0 +1,60 @@
+var Storage = {
+
+  automounterDisable: 0,
+  automounterEnable: 1,
+  automounterDisableWhenUnplugged: 2,
+
+  umsEnabled: 'ums.enabled',
+  umsMode: 'ums.mode',
+
+  init: function storageInit() {
+    this.setMode(this.automounterDisable, 'init');
+    window.addEventListener('lock', this);
+    window.addEventListener('unlock', this);
+
+    SettingsListener.observe(this.umsEnabled, false, function umsChanged(val) {
+      if (LockScreen.locked) {
+        // covers startup
+        Storage.setMode(Storage.automounterDisable, 'screen locked');
+      } else {
+        Storage.setMode(Storage.modeFromBool(val), 'change in ums.enabled');
+      }
+    });
+  },
+
+  modeFromBool: function storageModeFromBool(val) {
+     return val ? this.automounterEnable : this.automounterDisable;
+  },
+
+  setMode: function storageSetMode(val, reason) {
+    if (!window.navigator.mozSettings)
+      return;
+
+    //console.info('Setting', this.umsMode, 'to', val, 'due to', reason);
+    var param = {};
+    param[this.umsMode] = val;
+    SettingsListener.getSettingsLock().set(param);
+  },
+
+  handleEvent: function storageHandleEvent(e) {
+    switch (e.type) {
+      case 'lock':
+        this.setMode(this.automounterDisableWhenUnplugged, 'screen locked');
+        break;
+      case 'unlock':
+        if (!window.navigator.mozSettings)
+          return;
+
+        var req = SettingsListener.getSettingsLock().get(this.umsEnabled);
+        req.onsuccess = function umsEnabledFetched() {
+          var mode = Storage.modeFromBool(req.result[Storage.umsEnabled]);
+          Storage.setMode(mode, 'screen unlocked');
+        };
+        break;
+      default:
+        return;
+    }
+  }
+};
+
+Storage.init();