JI-1059 Add offline request queue only if frame contains H5P

Add logic for queueing requests that failed outside the H5P frame
Fix showing throbber when retrying because connection was reestablished

js/h5p.js

@@ -66,8 +66,6 @@ H5P.init = function (target) {
     H5P.$body = H5P.jQuery(document.body);
   }
 
-  H5P.offlineRequestQueue = new H5P.OfflineRequestQueue();
-
   // Determine if we can use full screen
   if (H5P.fullscreenSupported === undefined) {
     /**
@@ -106,6 +104,8 @@ H5P.init = function (target) {
       metadata: contentData.metadata
     };
 
+    H5P.offlineRequestQueue = new H5P.OfflineRequestQueue();
+
     H5P.getUserData(contentId, 'state', function (err, previousState) {
       if (previousState) {
         library.userDatas = {
@@ -2077,7 +2077,9 @@ H5P.setFinished = function (contentId, score, maxScore, time) {
     };
     H5P.jQuery.post(H5PIntegration.ajax.setFinished, data)
       .fail(function () {
+        if (H5P.offlineRequestQueue) {
           H5P.offlineRequestQueue.add(H5PIntegration.ajax.setFinished, data);
+        }
       });
   }
 };

js/request-queue.js

@@ -21,6 +21,10 @@ H5P.RequestQueue = (function ($, EventDispatcher) {
     // Initialize listener for when requests are added to queue
     window.addEventListener('offline', this.updateOnlineStatus.bind(this));
     window.addEventListener('online', this.updateOnlineStatus.bind(this));
+
+    this.on('connectionReestablished', function () {
+      this.resumeQueue();
+    }.bind(this));
   };
 
   /**
@@ -213,7 +217,7 @@ H5P.RequestQueue = (function ($, EventDispatcher) {
     const requestQueue = this.getStoredRequests();
     if (requestQueue.length) {
       message += ' ' + H5P.t('resubmitScores');
-      this.resumeQueue();
+      this.trigger('connectionReestablished');
     }
 
     this.displayToastMessage(message);
@@ -228,7 +232,7 @@ H5P.RequestQueue = (function ($, EventDispatcher) {
  * @type {offlineRequestQueue}
  */
 H5P.OfflineRequestQueue = (function (RequestQueue, Dialog) {
-  return function offlineRequestQueue() {
+  const offlineRequestQueue = function () {
     const requestQueue = new RequestQueue();
 
     // We could handle requests from previous pages here, but instead we throw them away
@@ -251,7 +255,6 @@ H5P.OfflineRequestQueue = (function (RequestQueue, Dialog) {
       classes: ['offline'],
     });
 
-
     const dialog = offlineDialog.getElement();
 
     // Add retry text to body
@@ -308,6 +311,11 @@ H5P.OfflineRequestQueue = (function (RequestQueue, Dialog) {
 
     }.bind(this));
 
+    requestQueue.on('connectionReestablished', function () {
+      // Skip resuming queue since request queue already does this
+      retryRequests(true);
+    }.bind(this));
+
     offlineDialog.on('confirmed', function () {
       // Show dialog on next render in case it is being hidden by the 'confirm' button
       isShowing = false;
@@ -316,6 +324,19 @@ H5P.OfflineRequestQueue = (function (RequestQueue, Dialog) {
       }, 100);
     }.bind(this));
 
+    // Listen for queued requests outside the iframe
+    window.addEventListener('message', function (event) {
+      const isValidQueueEvent = window.parent === event.source
+        && event.data.context === 'h5p'
+        && event.data.action === 'queueRequest';
+
+      if (!isValidQueueEvent) {
+        return;
+      }
+
+      this.add(event.data.url, event.data.data);
+    }.bind(this));
+
     /**
      * Toggle throbber visibility
      *
@@ -334,19 +355,21 @@ H5P.OfflineRequestQueue = (function (RequestQueue, Dialog) {
 
       if (isLoading) {
         throbberWrapper.classList.add('show');
-      }
-      else {
+      } else {
         throbberWrapper.classList.remove('show');
       }
     };
-
     /**
      * Retries the failed requests
+     *
+     * @param {boolean} [skipResumeQueue] Skip resuming queue (just do the visuals)
      */
-    const retryRequests = function () {
+    const retryRequests = function (skipResumeQueue) {
       clearInterval(currentInterval);
       toggleThrobber(true);
+      if (!skipResumeQueue) {
         requestQueue.resumeQueue();
+      }
     };
 
     /**
@@ -365,6 +388,11 @@ H5P.OfflineRequestQueue = (function (RequestQueue, Dialog) {
      * @param forceDelayedShow
      */
     const startCountDown = function (forceDelayedShow) {
+      // Already showing, wait for retry
+      if (isShowing) {
+        return;
+      }
+
       toggleThrobber(false);
       if (!isShowing) {
         if (forceDelayedShow) {
@@ -373,14 +401,14 @@ H5P.OfflineRequestQueue = (function (RequestQueue, Dialog) {
           setTimeout(function () {
             offlineDialog.show();
           }, 100);
-        }
-        else {
+        } else {
           offlineDialog.show();
         }
       }
       isShowing = true;
       startTime = new Date().getTime();
       incrementRetryInterval();
+      clearInterval(currentInterval);
       currentInterval = setInterval(updateCountDown, 100);
     };
 
@@ -409,4 +437,6 @@ H5P.OfflineRequestQueue = (function (RequestQueue, Dialog) {
       requestQueue.add(url, data);
     };
   };
+
+  return offlineRequestQueue;
 })(H5P.RequestQueue, H5P.ConfirmationDialog);