AOS dx.uconn.edu Practice

week-5/dx.uconn.edu/dxlab_files/ally.ui.js

@@ -0,0 +1,71 @@
+
+(function() {
+    // The obfuscated unique global variable that Ally will be available on
+    var initGlobalVar = 'ally_61cce107227eabdf27c3';
+
+    // The path to the hashed current version of the Ally script
+    var loaderPath = '/static/integration/api/ally.ui.61cce107227eabdf27c3.js';
+
+    // Certain integrations (D2L) can't add custom attributes on a script tag. Help them out by setting a default
+    var naiveAllyLoaderEl = document.querySelector('script[src*="ally.ui.js"][src*=platform-name]');
+    if (naiveAllyLoaderEl && !naiveAllyLoaderEl.getAttribute('data-ally-loader')) {
+        naiveAllyLoaderEl.setAttribute('data-ally-loader', '');
+    }
+
+    // The `data-ally-loader` attribute is required
+    var allyLoaderEl = document.querySelector('script[data-ally-loader]');
+    if (!allyLoaderEl) {
+        console.warn('Ally loaded without data-ally-loader script attribute. Aborting.');
+        return;
+    }
+
+    // Grab the script tag and extract the Ally hostname from the src URL
+    var allyLoaderUrl = allyLoaderEl.src;
+    var allyBaseUrl = '';
+    if (allyLoaderUrl.indexOf('://') !== -1) {
+        allyBaseUrl = allyLoaderUrl.split('/').slice(0, 3).join('/');
+    }
+
+    // If a value is specified for `data-ally-loader`, that becomes the name of the Ally global. Otherwise it defaults
+    // do `ally`
+    var allyGlobalVar = allyLoaderEl.getAttribute('data-ally-loader') || 'ally';
+
+    // Link to the current version of the Ally script
+    var script = document.createElement('script');
+    script.type = 'text/javascript';
+    script.src = allyBaseUrl + loaderPath;
+    document.getElementsByTagName('head')[0].appendChild(script);
+
+    // Add the specified global variable immediately and add helper `ready` function to bind to script load
+    var loaded = false;
+    window[allyGlobalVar] = window[allyGlobalVar] || {};
+    window[allyGlobalVar].ready = window[allyGlobalVar].ready || function(callback) {
+        callback = callback || function() {};
+        if (loaded) {
+            // If it's already loaded, call back immediately
+            return callback();
+        } else if (window[initGlobalVar]) {
+            // We've found it available, mark it as loaded
+            loaded = true;
+
+            // Bind it to the configured global variable
+            for (var key in window[initGlobalVar]) {
+                if (window[initGlobalVar].hasOwnProperty(key)) {
+                    window[allyGlobalVar][key] = window[initGlobalVar][key];
+                }
+            }
+
+            // Clean up the obfuscated global Ally originally loaded on
+            delete window[initGlobalVar];
+            return callback();
+        }
+
+        // Iterate every 100ms
+        // TODO: Could probably be a bit smarter here, and apply a timeout and kill-switch
+        setTimeout(window[allyGlobalVar].ready, 100, callback);
+    };
+
+    // Always start the initialization cycle right away so it's not _required_ for the consumer to run this function as
+    // maybe they have their own synchronization
+    window[allyGlobalVar].ready();
+})();