MOBILE-1399 site: Fix some DB errors due to logout

www/addons/calendar/services/calendar.js

@@ -175,6 +175,10 @@ angular.module('mm.addons.calendar')
      * @return {Promise}   Promise resolved when the event data is retrieved.
      */
     self.getEventFromLocalDb = function(id) {
+        if (!$mmSite.isLoggedIn()) {
+            // Not logged in, we can't get the site DB. User logged out or session expired while an operation was ongoing.
+            return $q.reject();
+        }
         return $mmSite.getDb().get(mmaCalendarEventsStore, id);
     };
 
@@ -426,6 +430,11 @@ angular.module('mm.addons.calendar')
      * @return {Promise}      Promise resolved when the notification is updated.
      */
     self.updateNotificationTime = function(event, time) {
+        if (!$mmSite.isLoggedIn()) {
+            // Not logged in, we can't get the site DB. User logged out or session expired while an operation was ongoing.
+            return $q.reject();
+        }
+
         var db = $mmSite.getDb();
 
         event.notificationtime = time;

www/addons/mod_scorm/services/scorm_offline.js

@@ -685,6 +685,11 @@ angular.module('mm.addons.mod_scorm')
         userId = userId || $mmSite.getUserId();
         scoData = scoData || {};
 
+        if (!$mmSite.isLoggedIn()) {
+            // Not logged in, we can't get the site DB. User logged out or session expired while an operation was ongoing.
+            return false;
+        }
+
         var lessonStatusInserted = false,
             scoUserData = scoData.userdata || {},
             db = $mmSite.getDb();

www/core/components/user/services/user.js

@@ -46,9 +46,13 @@ angular.module('mm.core.user')
      * @return {Promise}   Promise resolve when the user is deleted.
      */
     self.deleteStoredUser = function(id) {
-        var db = $mmSite.getDb();
+        if (!$mmSite.isLoggedIn()) {
+            // Not logged in, we can't get the site DB. User logged out or session expired while an operation was ongoing.
+            return $q.reject();
+        }
+
         self.invalidateUserCache(id); // Invalidate WS calls.
-        return db.remove(mmCoreUsersStore, parseInt(id));
+        return $mmSite.getDb().remove(mmCoreUsersStore, parseInt(id));
     };
 
     /**
@@ -155,8 +159,11 @@ angular.module('mm.core.user')
      * @return {Promise}   Promise resolve when the user is retrieved.
      */
     self.getUserFromLocal = function(id) {
-        var db = $mmSite.getDb();
-        return db.get(mmCoreUsersStore, parseInt(id));
+        if (!$mmSite.isLoggedIn()) {
+            // Not logged in, we can't get the site DB. User logged out or session expired while an operation was ongoing.
+            return $q.reject();
+        }
+        return $mmSite.getDb().get(mmCoreUsersStore, parseInt(id));
     };
 
     /**
@@ -239,8 +246,12 @@ angular.module('mm.core.user')
      * @return {Promise}         Promise resolve when the user is stored.
      */
     self.storeUser = function(id, fullname, avatar) {
-        var db = $mmSite.getDb();
-        return db.insert(mmCoreUsersStore, {
+        if (!$mmSite.isLoggedIn()) {
+            // Not logged in, we can't get the site DB. User logged out or session expired while an operation was ongoing.
+            return $q.reject();
+        }
+
+        return $mmSite.getDb().insert(mmCoreUsersStore, {
             id: parseInt(id),
             fullname: fullname,
             profileimageurl: avatar

www/core/lib/sitesmanager.js

@@ -471,7 +471,10 @@ angular.module('mm.core')
      * @return {Promise}
      */
     self.getSite = function(siteId) {
-        if (currentSite && currentSite.getId() === siteId) {
+        if (!siteId) {
+            // Site ID not valid, reject.
+            return $q.reject();
+        } else if (currentSite && currentSite.getId() === siteId) {
             return $q.when(currentSite);
         } else if (typeof sites[siteId] != 'undefined') {
             return $q.when(sites[siteId]);