Add meta tags and refactor code

Author: 64json

README.md

@@ -1,87 +1,3 @@
 # Algorithm Visualizer
 
-[![Join the chat at https://gitter.im/parkjs814/AlgorithmVisualizer](https://badges.gitter.im/parkjs814/AlgorithmVisualizer.svg)](https://gitter.im/parkjs814/AlgorithmVisualizer?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
-[![OpenCollective](https://opencollective.com/algorithmvisualizer/backers/badge.svg)](#backers) 
-[![OpenCollective](https://opencollective.com/algorithmvisualizer/sponsors/badge.svg)](#sponsors)
-
-http://parkjs814.github.io/AlgorithmVisualizer
-
-![Algorithm Visualizer](http://i.giphy.com/3o6EhJFgsyShX6MHeM.gif)
-
-### Contributing
-
-We encourage you to check out [**Wiki**](https://github.com/parkjs814/AlgorithmVisualizer/wiki) before you get started.
-
-If in need of any help, join our [Gitter](https://gitter.im/parkjs814/AlgorithmVisualizer?utm_source=share-link&utm_medium=link&utm_campaign=share-link) chatroom!
-
-Special thanks to our [Top Contributors](CONTRIBUTORS.md)!
-
-### Backers
-
-Support us with a monthly donation and help us continue our activities. [[Become a backer](https://opencollective.com/algorithmvisualizer#backer)]
-
-<a href="https://opencollective.com/algorithmvisualizer/backer/0/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/backer/0/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/backer/1/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/backer/1/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/backer/2/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/backer/2/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/backer/3/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/backer/3/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/backer/4/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/backer/4/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/backer/5/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/backer/5/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/backer/6/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/backer/6/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/backer/7/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/backer/7/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/backer/8/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/backer/8/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/backer/9/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/backer/9/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/backer/10/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/backer/10/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/backer/11/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/backer/11/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/backer/12/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/backer/12/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/backer/13/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/backer/13/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/backer/14/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/backer/14/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/backer/15/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/backer/15/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/backer/16/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/backer/16/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/backer/17/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/backer/17/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/backer/18/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/backer/18/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/backer/19/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/backer/19/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/backer/20/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/backer/20/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/backer/21/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/backer/21/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/backer/22/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/backer/22/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/backer/23/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/backer/23/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/backer/24/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/backer/24/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/backer/25/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/backer/25/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/backer/26/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/backer/26/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/backer/27/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/backer/27/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/backer/28/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/backer/28/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/backer/29/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/backer/29/avatar.svg"></a>
-
-### Sponsors
-
-Become a sponsor and get your logo on our README on Github with a link to your site. [[Become a sponsor](https://opencollective.com/algorithmvisualizer#sponsor)]
-
-<a href="https://opencollective.com/algorithmvisualizer/sponsor/0/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/sponsor/0/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/sponsor/1/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/sponsor/1/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/sponsor/2/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/sponsor/2/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/sponsor/3/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/sponsor/3/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/sponsor/4/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/sponsor/4/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/sponsor/5/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/sponsor/5/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/sponsor/6/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/sponsor/6/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/sponsor/7/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/sponsor/7/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/sponsor/8/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/sponsor/8/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/sponsor/9/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/sponsor/9/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/sponsor/10/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/sponsor/10/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/sponsor/11/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/sponsor/11/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/sponsor/12/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/sponsor/12/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/sponsor/13/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/sponsor/13/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/sponsor/14/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/sponsor/14/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/sponsor/15/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/sponsor/15/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/sponsor/16/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/sponsor/16/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/sponsor/17/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/sponsor/17/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/sponsor/18/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/sponsor/18/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/sponsor/19/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/sponsor/19/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/sponsor/20/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/sponsor/20/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/sponsor/21/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/sponsor/21/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/sponsor/22/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/sponsor/22/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/sponsor/23/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/sponsor/23/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/sponsor/24/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/sponsor/24/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/sponsor/25/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/sponsor/25/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/sponsor/26/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/sponsor/26/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/sponsor/27/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/sponsor/27/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/sponsor/28/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/sponsor/28/avatar.svg"></a>
-<a href="https://opencollective.com/algorithmvisualizer/sponsor/29/website" target="_blank"><img src="https://opencollective.com/algorithmvisualizer/sponsor/29/avatar.svg"></a>
+Write down your algorithm to be visualized.

branding/icon.png

@@ -76,6 +76,7 @@
     "react-ace": "^6.1.4",
     "react-chartjs-2": "^2.7.0",
     "react-dom": "^16.3.1",
+    "react-helmet": "^5.2.0",
     "react-input-autosize": "^2.2.1",
     "react-input-range": "^1.3.0",
     "react-markdown": "^3.3.0",

branding/icon.psd

@@ -15,9 +15,16 @@ const languages = [{
   ext: 'py',
   mode: 'python',
 }];
+
 const exts = languages.map(language => language.ext);
 
+const us = {
+  login: 'algorithm-visualizer',
+  avatar_url: 'https://github.com/algorithm-visualizer.png',
+};
+
 export {
   languages,
   exts,
+  us,
 };

branding/logo.png

@@ -2,6 +2,7 @@ import React from 'react';
 import Cookies from 'js-cookie';
 import { connect } from 'react-redux';
 import Promise from 'bluebird';
+import { Helmet } from 'react-helmet';
 import AutosizeInput from 'react-input-autosize';
 import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
 import faPlus from '@fortawesome/fontawesome-free-solid/faPlus';
@@ -21,7 +22,7 @@ import { CategoryApi, GitHubApi } from '/apis';
 import { tracerManager } from '/core';
 import { actions } from '/reducers';
 import { extension, refineGist } from '/common/util';
-import { exts } from '/common/config';
+import { exts, us } from '/common/config';
 import README from '/static/README.md';
 import styles from './stylesheet.scss';
 
@@ -127,7 +128,7 @@ class App extends React.Component {
 
   loadAlgorithm({ categoryKey, algorithmKey, gistId }) {
     const { ext } = this.props.env;
-    let fetchPromise = Promise.reject();
+    let fetchPromise = null;
     if (categoryKey && algorithmKey) {
       fetchPromise = CategoryApi.getAlgorithm(categoryKey, algorithmKey)
         .then(({ algorithm }) => algorithm);
@@ -136,7 +137,7 @@ class App extends React.Component {
         titles: ['Scratch Paper', 'Untitled'],
         files: [{
           name: 'README.md',
-          content: '# README',
+          content: `# Scratch Paper\nVisualize your own algorithm here!\n\n[Tracer API](https://github.com/algorithm-visualizer/tracers/wiki)`,
           contributors: [],
         }, {
           name: `code.${ext}`,
@@ -146,16 +147,15 @@ class App extends React.Component {
       });
     } else if (gistId) {
       fetchPromise = GitHubApi.getGist(gistId, { timestamp: Date.now() }).then(refineGist);
+    } else {
+      fetchPromise = Promise.reject(new Error());
     }
     fetchPromise
       .then(algorithm => this.props.setCurrent(categoryKey, algorithmKey, gistId, algorithm.titles, algorithm.files))
       .catch(() => this.props.setCurrent(undefined, undefined, undefined, ['Algorithm Visualizer'], [{
         name: 'README.md',
         content: README,
-        contributors: [{
-          login: 'algorithm-visualizer',
-          avatar_url: 'https://github.com/algorithm-visualizer.png',
-        }],
+        contributors: [us],
       }]))
       .finally(() => {
         const { files } = this.props.current;
@@ -214,7 +214,13 @@ class App extends React.Component {
     const { navigatorOpened, workspaceWeights, viewerTabIndex, editorTabIndex } = this.state;
     const { titles, files } = this.props.current;
 
-    const readmeFile = files.find(file => file.name === 'README.md');
+    const readmeFile = files.find(file => file.name === 'README.md') || {
+      name: 'README.md',
+      content: `# ${titles[1]}\nREADME.md not found`,
+      contributors: [us],
+    };
+    const groups = /^\s*# .*\n+([^\n]+)/.exec(readmeFile.content);
+    const description = groups && groups[1] || '';
 
     const editorTitles = files.map(file => file.name);
     if (files[editorTabIndex]) {
@@ -229,6 +235,10 @@ class App extends React.Component {
 
     return (
       <div className={styles.app}>
+        <Helmet>
+          <title>{titles.join(' - ')}</title>
+          <meta name="description" content={description} />
+        </Helmet>
         <Header className={styles.header} onClickTitleBar={() => this.toggleNavigatorOpened()}
                 navigatorOpened={navigatorOpened} loadScratchPapers={() => this.loadScratchPapers()}
                 loadAlgorithm={params => this.loadAlgorithm(params)}
@@ -239,7 +249,7 @@ class App extends React.Component {
           <Navigator loadAlgorithm={params => this.loadAlgorithm(params)} />
           <TabContainer titles={['Description', 'Visualization']} tabIndex={viewerTabIndex}
                         onChangeTabIndex={tabIndex => this.handleChangeViewerTabIndex(tabIndex)}>
-            <MarkdownViewer source={readmeFile ? readmeFile.content : 'README.md not found'} />
+            <MarkdownViewer source={readmeFile.content} />
             <VisualizationViewer />
           </TabContainer>
           <TabContainer className={styles.editor_tab_container} titles={editorTitles} tabIndex={editorTabIndex}

branding/logo.psd

@@ -13,6 +13,12 @@ class Button extends React.Component {
     this.state = {
       confirming: false,
     };
+
+    this.timeout = null;
+  }
+
+  componentWillUnmount() {
+    if (this.timeout) window.clearTimeout(this.timeout);
   }
 
   render() {
@@ -29,7 +35,8 @@ class Button extends React.Component {
         href = null;
         onClick = () => {
           this.setState({ confirming: true });
-          window.setTimeout(() => {
+          this.timeout = window.setTimeout(() => {
+            this.timeout = null;
             this.setState({ confirming: false });
           }, 2000);
         };

package.json

@@ -4,6 +4,7 @@
   display: flex;
   flex-direction: column-reverse;
   padding: 16px;
+  pointer-events: none;
 }
 
 .toast {
@@ -14,6 +15,7 @@
   margin: 8px;
   font-size: $font-size-large;
   white-space: pre-line;
+  pointer-events: auto;
 
   &.success {
     border-color: rgb(0, 150, 0);