ui: Move the text encoding polyfill to a a proper detecting polyfill (#4767)

ui-v2/app/index.html

@@ -25,6 +25,17 @@
     </noscript>
     {{content-for "body"}}
     <script src="{{rootURL}}assets/vendor.js"></script>
+    <script>
+      var appendScript = function(src) {
+        var $script = document.createElement('script');
+        $script.src = src;
+        document.body.appendChild($script);
+      }
+      if(!('TextDecoder' in window)) {
+        appendScript('{{rootURL}}assets/encoding-indexes.js');
+        appendScript('{{rootURL}}assets/encoding.js');
+      }
+    </script>
     <script src="{{rootURL}}assets/consul-ui.js"></script>
 
     {{content-for "body-footer"}}

ui-v2/app/utils/atob.js

@@ -1,9 +1,6 @@
-import TextEncoding from 'npm:text-encoding';
 import base64js from 'npm:base64-js';
 export default function(str, encoding = 'utf-8') {
   // decode
   const bytes = base64js.toByteArray(str);
-  return new ('TextDecoder' in window ? TextDecoder : TextEncoding.TextDecoder)(encoding).decode(
-    bytes
-  );
+  return new TextDecoder(encoding).decode(bytes);
 }

ui-v2/app/utils/btoa.js

@@ -1,7 +1,6 @@
-import TextEncoding from 'npm:text-encoding';
 import base64js from 'npm:base64-js';
 export default function(str, encoding = 'utf-8') {
   // encode
-  const bytes = new ('TextEncoder' in window ? TextEncoder : TextEncoding.TextEncoder)(encoding).encode(str);
+  const bytes = new TextEncoder(encoding).encode(str);
   return base64js.fromByteArray(bytes);
 }

ui-v2/ember-cli-build.js

@@ -65,6 +65,8 @@ module.exports = function(defaults) {
   // modules that you would like to import into your application
   // please specify an object with the list of modules as keys
   // along with the exports of each module as its value.
+  app.import('node_modules/text-encoding/lib/encoding-indexes.js', {outputFile: 'assets/encoding-indexes.js'})
+  app.import('node_modules/text-encoding/lib/encoding.js', {outputFile: 'assets/encoding.js'})
   let tree = app.toTree();
   return tree;
 };