From bade8b7b4291091d8a77f304d92018eae51e62b8 Mon Sep 17 00:00:00 2001
From: danielghost <daniel.ghost@kineo.com>
Date: Tue, 6 Oct 2020 16:37:45 +0100
Subject: [PATCH] Amend for
 https://github.com/adaptlearning/adapt_framework/issues/2743 - remove the
 flush for Adapt.wait.

---
 src/core/js/wait.js | 115 ++++++++++++--------------------------------
 1 file changed, 30 insertions(+), 85 deletions(-)

diff --git a/src/core/js/wait.js b/src/core/js/wait.js
index 85cda30e7..4e1b9d09b 100644
--- a/src/core/js/wait.js
+++ b/src/core/js/wait.js
@@ -2,63 +2,29 @@ define(function() {
 
   var Wait = Backbone.Controller.extend({
 
+    _waitCount: 0,
+    _callbackHandle: null,
+
     initialize: function() {
       _.bindAll(this, 'begin', 'end');
     },
 
-    _waitCount: 0,
-    _callbackHandle: null,
-    _timeoutHandlerId: null,
-    _timeoutInSeconds: 7,
-
     /**
-       * Returns true if there are items in the waiting count.
-       *
-       * @return {Boolean}
-       */
+     * Returns true if there are items in the waiting count.
+     *
+     * @return {Boolean}
+     */
     isWaiting: function() {
       return (this._waitCount !== 0);
     },
 
     /**
-       * Starts or re-starts a timer to ensure that pending calls to end()
-       * are actually executed after a timeout period.
-       */
-    startTimer: function() {
-      this.stopTimer();
-
-      this._timeoutHandlerId = setInterval(function() {
-        // Flush Adapt.wait due to timeout
-        while (this._waitCount > 0) {
-          // Trigger an end() for anything waiting.
-          this.end();
-        }
-
-        if (this._waitCount === 0) {
-          this.stopTimer();
-        }
-      }.bind(this), this._timeoutInSeconds * 1000);
-    },
-
-    /**
-       * Clears the timer.
-       */
-    stopTimer: function() {
-      if (this._timeoutHandlerId) {
-        clearInterval(this._timeoutHandlerId);
-      }
-    },
-
-    /**
-       * Add one item to the waiting count.
-       *
-       * @return {Object}
-       */
+     * Add one item to the waiting count.
+     *
+     * @return {Object}
+     */
     begin: function() {
-
-      if (!this.isWaiting()) {
-        this.trigger('wait');
-      }
+      if (!this.isWaiting()) this.trigger('wait');
 
       this._waitCount++;
 
@@ -67,58 +33,39 @@ define(function() {
         this._callbackHandle = null;
       }
 
-      this.startTimer();
-
       return this;
-
     },
 
     /**
-       * Remove an item from the waiting count and trigger ready asynchronously if no more items are waiting.
-       *
-       * @return {Object}
-       */
+     * Remove an item from the waiting count and trigger ready asynchronously if no more items are waiting.
+     *
+     * @return {Object}
+     */
     end: function() {
-
-      if (!this.isWaiting()) {
-        return this;
-      }
+      if (!this.isWaiting()) return this;
 
       this._waitCount--;
 
-      if (this._waitCount === 0) {
-        this.stopTimer();
-      }
-
-      if (this.isWaiting()) {
-        return this;
-      }
-
-      if (this._callbackHandle) {
-        return this;
-      }
+      if (this.isWaiting() || this._callbackHandle) return this;
 
       this._callbackHandle = setTimeout(function() {
-
         this._callbackHandle = null;
         this.trigger('ready');
-
       }.bind(this), 0);
 
       return this;
-
     },
 
     /**
-       * Queue this function until all open waits have been ended.
-       *
-       * @param  {Function} [callback]
-       * @return {Object|Promise}
-       */
+     * Queue this function until all open waits have been ended.
+     *
+     * @param  {Function} [callback]
+     * @return {Object|Promise}
+     */
     queue: function(callback) {
-
       if (!callback) {
         this.begin();
+
         return new Promise(resolve => {
           this.once('ready', resolve);
           this.end();
@@ -130,24 +77,22 @@ define(function() {
       this.end();
 
       return this;
-
     },
 
     /**
-       * Wait for this asynchronous function to execute before triggering ready event.
-       *
-       * @param  {Function} callback   [ Function to execute whilst holding queued callback. Once complete run first argument, done(). ]
-       * @return {Object}
-       */
+     * Wait for this asynchronous function to execute before triggering ready event.
+     *
+     * @param  {Function} callback   [ Function to execute whilst holding queued callback. Once complete run first argument, done(). ]
+     * @return {Object}
+     */
     for: function(callback) {
-
       this.begin();
+
       _.defer(function() {
         callback(_.once(this.end));
       }.bind(this));
 
       return this;
-
     }
 
   });