Dance party: Don't allow song to be changed while running

apps/src/dance/Dance.js

@@ -11,7 +11,7 @@ import Sounds from '../Sounds';
 import {TestResults} from '../constants';
 import {DanceParty} from '@code-dot-org/dance-party';
 import danceMsg from './locale';
-import {reducers, setSelectedSong, setSongData} from './redux';
+import {reducers, setSelectedSong, setSongData, setRunIsStarting} from './redux';
 import trackEvent from '../util/trackEvent';
 import {SignInState} from '../code-studio/progressRedux';
 import logToCloud from '../logToCloud';
@@ -381,16 +381,17 @@ Dance.prototype.runButtonClick = async function () {
   // Block re-entrancy since starting a run is async
   // (not strictly needed since we disable the run button,
   // but better to be safe)
-  if (this.runIsStarting) {
+  if (getStore().getState().songs.runIsStarting) {
     return;
   }
+
   // Disable the run button now to give some visual feedback
   // that the button was pressed. toggleRunReset() will
   // eventually execute down below, but there are some long-running
   // tasks that need to complete first
   const runButton = document.getElementById('runButton');
   runButton.disabled = true;
-  this.runIsStarting = true;
+  getStore().dispatch(setRunIsStarting(true));
   await this.danceReadyPromise;
 
   //Log song count in Dance Lab
@@ -404,7 +405,7 @@ Dance.prototype.runButtonClick = async function () {
   } finally {
     this.studioApp_.toggleRunReset('reset');
     // Safe to allow normal run/reset behavior now
-    this.runIsStarting = false;
+    getStore().dispatch(setRunIsStarting(false));
   }
 
   // Enable the Finish button if is present:

apps/src/dance/DanceVisualizationColumn.jsx

@@ -20,6 +20,7 @@ const styles = {
 
 const SongSelector = Radium(class extends React.Component {
   static propTypes = {
+    enableSongSelection: PropTypes.bool,
     setSong: PropTypes.func.isRequired,
     selectedSong: PropTypes.string,
     songData: PropTypes.objectOf(PropTypes.object).isRequired,
@@ -35,7 +36,13 @@ const SongSelector = Radium(class extends React.Component {
     return (
       <div>
         <label><b>{i18n.selectSong()}</b></label>
-        <select id="song_selector" style={styles.selectStyle} onChange={this.changeSong} value={this.props.selectedSong}>
+        <select
+          id="song_selector"
+          style={styles.selectStyle}
+          onChange={this.changeSong}
+          value={this.props.selectedSong}
+          disabled={!this.props.enableSongSelection}
+        >
           {Object.keys(this.props.songData).map((option, i) => (
             (this.props.filterOff || !this.props.songData[option].pg13) &&
               <option key={i} value={option}>{this.props.songData[option].title}</option>
@@ -52,6 +59,8 @@ class DanceVisualizationColumn extends React.Component {
     showFinishButton: PropTypes.bool.isRequired,
     setSong: PropTypes.func.isRequired,
     selectedSong: PropTypes.string,
+    levelIsRunning: PropTypes.bool,
+    levelRunIsStarting: PropTypes.bool,
     isShareView: PropTypes.bool.isRequired,
     songData: PropTypes.objectOf(PropTypes.object).isRequired,
     userType: PropTypes.string.isRequired
@@ -73,11 +82,13 @@ class DanceVisualizationColumn extends React.Component {
     const teacherOverride = queryString.parse(window.location.search).songfilter === 'on';
     const signedOutAge = sessionStorage.getItem('anon_over13') ? sessionStorage.getItem('anon_over13') : false;
     const filterOff = (signedInOver13 || signedOutAge) && !teacherOverride;
+    const enableSongSelection = !this.props.levelIsRunning && !this.props.levelRunIsStarting;
 
     return (
       <span>
         {!this.props.isShareView &&
           <SongSelector
+            enableSongSelection={enableSongSelection}
             setSong={this.props.setSong}
             selectedSong={this.props.selectedSong}
             songData={this.props.songData}
@@ -103,5 +114,7 @@ export default connect(state => ({
   isShareView: state.pageConstants.isShareView,
   songData: state.songs.songData,
   selectedSong: state.songs.selectedSong,
-  userType: state.progress.userType
+  userType: state.progress.userType,
+  levelIsRunning: state.runState.isRunning,
+  levelRunIsStarting: state.songs.runIsStarting
 }))(DanceVisualizationColumn);

apps/src/dance/redux.js

@@ -3,6 +3,7 @@
 /** @enum {string} */
 export const SET_SELECTED_SONG = 'dance/SET_SELECTED_SONG';
 export const SET_SONG_DATA = 'dance/SET_SONG_DATA';
+export const SET_RUN_IS_STARTING = 'dance/SET_RUN_IS_STARTING';
 
 export function setSelectedSong(song) {
   return {
@@ -18,6 +19,13 @@ export function setSongData(songData) {
   };
 }
 
+export function setRunIsStarting(runIsStarting) {
+  return {
+    type: SET_RUN_IS_STARTING,
+    runIsStarting
+  };
+}
+
 export const actions = {
   setSelectedSong
 };
@@ -42,6 +50,11 @@ function songs(state, action) {
         ...state,
         songData: action.songData,
       };
+    case SET_RUN_IS_STARTING:
+      return {
+        ...state,
+        runIsStarting: action.runIsStarting
+      };
     default:
       return state;
   }