fix xsslint to work with es6 imports

Change-Id: I97fa2ca9cada24d81a9ced7c8fa7d72997092673
Reviewed-on: https://gerrit.instructure.com/100836
Tested-by: Jenkins
Reviewed-by: Jon Jensen <jon@instructure.com>
Product-Review: Ryan Shaw <ryan@instructure.com>
QA-Review: Ryan Shaw <ryan@instructure.com>

app/jsx/quizzes/question_bank/moveMultipleQuestionBanks.jsx

@@ -67,8 +67,9 @@ define([
       $.ajaxJSON(window.location.href + '/questions?page=' + this.page, 'GET', {}, $.proxy(this.onData, this))
     },
     onData: function(data){
+      const html = moveQuestionTemplate(data)
       this.elements.$loadMessage.remove()
-      this.elements.$questions.append(moveQuestionTemplate(data))
+      this.elements.$questions.append(html)
       if (this.page < data.pages){
         this.elements.$questions.append(this.elements.$loadMessage)
         this.page += 1

script/xsslint.js

@@ -32,6 +32,37 @@ Linter.prototype.isSafeString = function(node) {
   return (wrapperOption.length > 0)
 }
 
+// handle the way babel transforms es6 imports, eg:
+// import htmlEscape from 'htmlEscape'
+// "foo ${htmlEscape(bar)}"
+// which gets converted by babel into:
+// var _htmlEscape2 = _interopRequireDefault(_htmlEscape);
+// 'foo ' + (0, _htmlEscape2.default)(bar)
+const originalIsSafeString = Linter.prototype.isSafeString
+Linter.prototype.isSafeString = function isSafeStringWithES6ImportHandling (node) {
+  const result = originalIsSafeString.call(this, node)
+  if (result) return result
+
+  const callee = node.callee
+  if (
+    // look for something like (0, _htmlEscape2.default)(...)
+    callee && callee.type === 'SequenceExpression' &&
+    callee.expressions.length === 2 &&
+    callee.expressions[0].type === 'Literal' &&
+    callee.expressions[0].value === 0 &&
+    callee.expressions[1].type === 'MemberExpression' &&
+    callee.expressions[1].property.name === 'default'
+  ) {
+    const thingWeActuallyWantToCheck = callee.expressions[1].object
+    const babelizedFnName = thingWeActuallyWantToCheck.name // eg: "_htmlEscape2"
+    const originalFnName = babelizedFnName.replace(/^_/, '').replace(/\d$/, '') // eg: 'htmlEscape'
+
+    const copyOfNode = Object.assign({}, thingWeActuallyWantToCheck, {name: originalFnName})
+    if (this.identifierMatches(copyOfNode, 'safeString', '.function')) return true
+  }
+  return false
+}
+
 function getFilesAndDirs(root, files, dirs) {
   root = root === "." ? "" : root + "/";
   files = files || [];