fix: restore preview background to white (#36714)

client/src/templates/Challenges/components/preview.css

@@ -5,6 +5,7 @@
   padding: 0;
   margin: 0;
   border: none;
+  background-color: white;
 }
 
 .enable-iframe {

client/src/templates/Challenges/rechallenge/builders.js

@@ -9,7 +9,6 @@ import {
 } from 'lodash';
 
 import { compileHeadTail, setExt, transformContents } from '../utils/polyvinyl';
-import { nightThemeStyle } from './displayStyle.js';
 
 const htmlCatch = '\n<!--fcc-->\n';
 const jsCatch = '\n;/*fcc*/\n';
@@ -57,15 +56,8 @@ export const cssToHtml = cond([
   [stubTrue, identity]
 ]);
 
-export function concatHtml({
-  required = [],
-  template,
-  files = [],
-  theme = 'night'
-} = {}) {
-  theme = theme === '' ? 'night' : theme;
+export function concatHtml({ required = [], template, files = [] } = {}) {
   const createBody = template ? _template(template) : defaultTemplate;
-  const displayTheme = theme === 'night' ? nightThemeStyle : ` `;
   const head = required
     .map(({ link, src }) => {
       if (link && src) {
@@ -81,7 +73,7 @@ A required file can not have both a src and a link: src = ${src}, link = ${link}
       }
       return '';
     })
-    .reduce((head, element) => head.concat(element), displayTheme);
+    .reduce((head, element) => head.concat(element));
 
   const source = files.reduce(
     (source, file) => source.concat(file.contents, htmlCatch),

client/src/templates/Challenges/rechallenge/displayStyle.js

@@ -1,10 +0,0 @@
-export const nightThemeStyle = `
-<style>
-  html{
-    color: white;
-  }
-  a {
-    color: #99c9ff;
-  }
-</style>
-`;

client/src/templates/Challenges/redux/index.js

@@ -15,7 +15,6 @@ import { createIdToNameMapSaga } from './id-to-name-map-saga';
 import { createExecuteChallengeSaga } from './execute-challenge-saga';
 import { createCurrentChallengeSaga } from './current-challenge-saga';
 import { challengeTypes } from '../../../../utils/challengeTypes';
-import { userSelector } from '../../../redux';
 
 export const ns = 'challenge';
 export const backendNS = 'backendChallenge';
@@ -183,7 +182,6 @@ export const projectFormValuesSelector = state =>
   state[ns].projectFormValues || {};
 
 export const challengeDataSelector = state => {
-  const { theme } = userSelector(state);
   const { challengeType } = challengeMetaSelector(state);
   let challengeData = { challengeType };
   if (
@@ -225,7 +223,6 @@ export const challengeDataSelector = state => {
       template
     };
   }
-  challengeData.theme = theme;
   return challengeData;
 };
 

client/src/templates/Challenges/utils/build.js

@@ -108,12 +108,7 @@ async function getDOMTestRunner(buildData, proxyLogger, document) {
     runTestInTestFrame(document, testString, testTimeout);
 }
 
-export function buildDOMChallenge({
-  files,
-  required = [],
-  template = '',
-  theme = ``
-}) {
+export function buildDOMChallenge({ files, required = [], template = '' }) {
   const finalRequires = [...globalRequires, ...required, ...frameRunner];
   const loadEnzyme = Object.keys(files).some(key => files[key].ext === 'jsx');
   const toHtml = [jsToHtml, cssToHtml];
@@ -125,7 +120,7 @@ export function buildDOMChallenge({
     .then(checkFilesErrors)
     .then(files => ({
       challengeType: challengeTypes.html,
-      build: concatHtml({ required: finalRequires, template, files, theme }),
+      build: concatHtml({ required: finalRequires, template, files }),
       sources: buildSourceMap(files),
       loadEnzyme
     }));