ReactMarkdown -> killy.format

4 files changed, 342 insertions, 183 deletions

diff --git a/vnext/package.json b/vnext/package.json
index da21b308..3eaec73f 100644
--- a/vnext/package.json
+++ b/vnext/package.json
@@ -39,7 +39,6 @@
     "query-string": "^6.1.0",
     "react": "^16.4.1",
     "react-dom": "^16.4.1",
-    "react-markdown": "^3.3.3",
     "react-router-dom": "^4.3.1",
     "whatwg-fetch": "^2.0.4"
   }
diff --git a/vnext/src/components/Message.js b/vnext/src/components/Message.js
index d1a9c51f..53c2a033 100644
--- a/vnext/src/components/Message.js
+++ b/vnext/src/components/Message.js
@@ -1,12 +1,13 @@
 import React from 'react';
 import PropTypes from 'prop-types';
-import ReactMarkdown from 'react-markdown';
 import moment from 'moment';
 
 import { UserType } from './Types';
 import Icon from './Icon';
 import Avatar from './Avatar';
 
+import { format } from '../utils/embed';
+
 export default function Message(props) {
     const msg = props.data;
     const visitor = props.visitor;
@@ -29,7 +30,7 @@ export default function Message(props) {
                     <Tags data={msg.tags || []} />
                 </div>
             </header>
-            <ReactMarkdown itemProp="description" source={msg.body} />
+            <p itemProp="description" dangerouslySetInnerHTML={{ __html: format(msg.body, msg.mid, (msg.tags || []).indexOf('code') >= 0) }}></p>
             {msg.photo &&
                 <p className="ir"><a href={`//i.juick.com/p/${msg.mid}.${msg.attach}`} data-fname={`${msg.mid}.${msg.attach}`}>
                     <img itemProp="image" src={`//i.juick.com/p/${msg.mid}.${msg.attach}`} alt="" /></a>
diff --git a/vnext/src/utils/embed.js b/vnext/src/utils/embed.js
new file mode 100644
index 00000000..25c37142
--- /dev/null
+++ b/vnext/src/utils/embed.js
@@ -0,0 +1,336 @@
+
+function insertAfter(newNode, referenceNode) {
+  referenceNode.parentNode.insertBefore(newNode, referenceNode.nextSibling);
+}
+
+function setContent(containerNode, ...newNodes) {
+  removeAllFrom(containerNode);
+  newNodes.forEach(n => containerNode.appendChild(n));
+  return containerNode;
+}
+
+function removeAllFrom(fromNode) {
+  for (let c; c = fromNode.lastChild; ) { fromNode.removeChild(c); }
+}
+
+function htmlEscape(html) {
+  let textarea = document.createElement('textarea');
+  textarea.textContent = html;
+  return textarea.innerHTML;
+}
+
+// rules :: [{pr: number, re: RegExp, with: string}]
+// rules :: [{pr: number, re: RegExp, with: Function}]
+// rules :: [{pr: number, re: RegExp, brackets: true, with: [string, string]}]
+// rules :: [{pr: number, re: RegExp, brackets: true, with: [string, string, Function]}]
+function formatText(txt, rules) {
+  let idCounter = 0;
+  function nextId() { return idCounter++; }
+  function ft(txt, rules) {
+    let matches = rules.map(r => { r.re.lastIndex = 0; return [r, r.re.exec(txt)]; })
+                       .filter(([,m]) => m !== null)
+                       .sort(([r1,m1],[r2,m2]) => (r1.pr - r2.pr) || (m1.index - m2.index));
+    if (matches && matches.length > 0) {
+      let [rule, match] = matches[0];
+      let subsequentRules = rules.filter(r => r.pr >= rule.pr);
+      let idStr = `<>(${nextId()})<>`;
+      let outerStr = txt.substring(0, match.index) + idStr + txt.substring(rule.re.lastIndex);
+      let innerStr = (rule.brackets)
+        ? (() => { let [l ,r ,f] = rule.with; return l + ft((f ? f(match[1]) : match[1]), subsequentRules) + r; })()
+        : match[0].replace(rule.re, rule.with);
+      return ft(outerStr, subsequentRules).replace(idStr, innerStr);
+    }
+    return txt;
+  }
+  return ft(htmlEscape(txt), rules); // idStr above relies on the fact the text is escaped
+}
+
+function fixWwwLink(url) {
+  return url.replace(/^(?!([a-z]+:)?\/\/)/i, '//');
+}
+
+function makeNewNode(embedType, aNode, reResult) {
+  const withClasses = el => {
+    if (embedType.className) {
+      el.classList.add(...embedType.className.split(' '));
+    }
+    return el;
+  };
+  return embedType.makeNode(aNode, reResult, withClasses(document.createElement('div')));
+}
+
+function makeIframe(src, w, h, scrolling='no') {
+  let iframe = document.createElement('iframe');
+  iframe.style.width = w;
+  iframe.style.height = h;
+  iframe.frameBorder = 0;
+  iframe.scrolling = scrolling;
+  iframe.setAttribute('allowFullScreen', '');
+  iframe.src = src;
+  iframe.innerHTML = 'Cannot show iframes.';
+  return iframe;
+}
+
+function makeResizableToRatio(element, ratio) {
+  element.dataset['ratio'] = ratio;
+  makeResizable(element, w => w * element.dataset['ratio']);
+}
+
+// calcHeight :: Number -> Number -- calculate element height for a given width
+function makeResizable(element, calcHeight) {
+  const setHeight = el => {
+    if (document.body.contains(el) && (el.offsetWidth > 0)) {
+      el.style.height = (calcHeight(el.offsetWidth)).toFixed(2) + 'px';
+    }
+  };
+  window.addEventListener('resize', () => setHeight(element));
+  setHeight(element);
+}
+
+function extractDomain(url) {
+  const domainRe = /^(?:https?:\/\/)?(?:[^@\/\n]+@)?(?:www\.)?([^:\/\n]+)/i;
+  return domainRe.exec(url)[1];
+}
+
+function urlReplace(match, p1, p2, p3) {
+  let isBrackets = (p1 !== undefined);
+  return (isBrackets)
+    ? `<a href="${fixWwwLink(p2 || p3)}">${p1}</a>`
+    : `<a href="${fixWwwLink(match)}">${extractDomain(match)}</a>`;
+}
+
+function urlReplaceInCode(match, p1, p2, p3) {
+  let isBrackets = (p1 !== undefined);
+  return (isBrackets)
+    ? `<a href="${fixWwwLink(p2 || p3)}">${match}</a>`
+    : `<a href="${fixWwwLink(match)}">${match}</a>`;
+}
+
+function messageReplyReplace(messageId) {
+  return function(match, mid, rid) {
+    let replyPart = (rid && rid != '0') ? '#' + rid : '';
+    return `<a href="/${mid || messageId}${replyPart}">${match}</a>`;
+  };
+}
+
+/**
+ * Given "txt" message in unescaped plaintext with Juick markup, this function
+ * returns escaped formatted HTML string.
+ *
+ * @param {string} txt
+ * @param {string} messageId - current message id
+ * @param {boolean} isCode
+ * @returns {string}
+ */
+function juickFormat(txt, messageId, isCode) {
+  const urlRe = /(?:\[([^\]\[]+)\](?:\[([^\]]+)\]|\(((?:[a-z]+:\/\/|www\.|ftp\.)(?:\([-\w+*&@#/%=~|$?!:;,.]*\)|[-\w+*&@#/%=~|$?!:;,.])*(?:\([-\w+*&@#/%=~|$?!:;,.]*\)|[\w+*&@#/%=~|$]))\))|\b(?:[a-z]+:\/\/|www\.|ftp\.)(?:\([-\w+*&@#/%=~|$?!:;,.]*\)|[-\w+*&@#/%=~|$?!:;,.])*(?:\([-\w+*&@#/%=~|$?!:;,.]*\)|[\w+*&@#/%=~|$]))/gi;
+  const bqReplace = m => m.replace(/^(?:>|&gt;)\s?/gmi, '');
+  return (isCode)
+    ? formatText(txt, [
+      { pr: 1, re: urlRe, with: urlReplaceInCode },
+      { pr: 1, re: /\B(?:#(\d+))?(?:\/(\d+))?\b/g, with: messageReplyReplace(messageId) },
+      { pr: 1, re: /\B@([\w-]+)\b/gi, with: '<a href="/$1">@$1</a>' },
+    ])
+    : formatText(txt, [
+      { pr: 0, re: /((?:^(?:>|&gt;)\s?[\s\S]+?$\n?)+)/gmi, brackets: true, with: ['<q>', '</q>', bqReplace] },
+      { pr: 1, re: urlRe, with: urlReplace },
+      { pr: 1, re: /\B(?:#(\d+))?(?:\/(\d+))?\b/g, with: messageReplyReplace(messageId) },
+      { pr: 1, re: /\B@([\w-]+)\b/gi, with: '<a href="/$1">@$1</a>' },
+      { pr: 2, re: /\B\*([^\n]+?)\*((?=\s)|(?=$)|(?=[!\"#$%&'*+,\-./:;<=>?@[\]^_`{|}~()]+))/g, brackets: true, with: ['<b>', '</b>'] },
+      { pr: 2, re: /\B\/([^\n]+?)\/((?=\s)|(?=$)|(?=[!\"#$%&'*+,\-./:;<=>?@[\]^_`{|}~()]+))/g, brackets: true, with: ['<i>', '</i>'] },
+      { pr: 2, re: /\b\_([^\n]+?)\_((?=\s)|(?=$)|(?=[!\"#$%&'*+,\-./:;<=>?@[\]^_`{|}~()]+))/g, brackets: true, with: ['<span class="u">', '</span>'] },
+      { pr: 3, re: /\n/g, with: '<br/>' },
+    ]);
+}
+
+function getEmbeddableLinkTypes() {
+  return [
+    {
+      name: 'Jpeg and png images',
+      id: 'embed_jpeg_and_png_images',
+      className: 'picture compact',
+      ctsDefault: false,
+      re: /\.(jpe?g|png|svg)(:[a-zA-Z]+)?(?:\?[\w&;\?=]*)?$/i,
+      makeNode: function(aNode, reResult, div) {
+        div.innerHTML = `<a href="${aNode.href}"><img src="${aNode.href}"></a>`;
+        return div;
+      }
+    },
+    {
+      name: 'Gif images',
+      id: 'embed_gif_images',
+      className: 'picture compact',
+      ctsDefault: true,
+      re: /\.gif(:[a-zA-Z]+)?(?:\?[\w&;\?=]*)?$/i,
+      makeNode: function(aNode, reResult, div) {
+        div.innerHTML = `<a href="${aNode.href}"><img src="${aNode.href}"></a>`;
+        return div;
+      }
+    },
+    {
+      name: 'Video (webm, mp4, ogv)',
+      id: 'embed_webm_and_mp4_videos',
+      className: 'video compact',
+      ctsDefault: false,
+      re: /\.(webm|mp4|m4v|ogv)(?:\?[\w&;\?=]*)?$/i,
+      makeNode: function(aNode, reResult, div) {
+        div.innerHTML = `<video src="${aNode.href}" title="${aNode.href}" controls></video>`;
+        return div;
+      }
+    },
+    {
+      name: 'Audio (mp3, ogg, weba, opus, m4a, oga, wav)',
+      id: 'embed_sound_files',
+      className: 'audio singleColumn',
+      ctsDefault: false,
+      re: /\.(mp3|ogg|weba|opus|m4a|oga|wav)(?:\?[\w&;\?=]*)?$/i,
+      makeNode: function(aNode, reResult, div) {
+        div.innerHTML = `<audio src="${aNode.href}" title="${aNode.href}" controls></audio>`;
+        return div;
+      }
+    },
+    {
+      name: 'YouTube videos (and playlists)',
+      id: 'embed_youtube_videos',
+      className: 'youtube resizableV singleColumn',
+      ctsDefault: false,
+      re: /^(?:https?:)?\/\/(?:www\.|m\.|gaming\.)?(?:youtu(?:(?:\.be\/|be\.com\/(?:v|embed)\/)([-\w]+)|be\.com\/watch)((?:(?:\?|&(?:amp;)?)(?:\w+=[-\.\w]*[-\w]))*)|youtube\.com\/playlist\?list=([-\w]*)(&(amp;)?[-\w\?=]*)?)/i,
+      makeNode: function(aNode, reResult, div) {
+        let [url, v, args, plist] = reResult;
+        let iframeUrl;
+        if (plist) {
+          iframeUrl = '//www.youtube-nocookie.com/embed/videoseries?list=' + plist;
+        } else {
+          let pp = {}; args.replace(/^\?/, '')
+                           .split('&')
+                           .map(s => s.split('='))
+                           .forEach(z => pp[z[0]] = z[1]);
+          let embedArgs = { rel: '0' };
+          if (pp.t) {
+            const tre = /^(?:(\d+)|(?:(\d+)h)?(?:(\d+)m)?(\d+)s|(?:(\d+)h)?(\d+)m|(\d+)h)$/i;
+            let [, t, h, m, s, h1, m1, h2] = tre.exec(pp.t);
+            embedArgs['start'] = (+t) || ((+(h || h1 || h2 || 0))*60*60 + (+(m || m1 || 0))*60 + (+(s || 0)));
+          }
+          if (pp.list) {
+            embedArgs['list'] = pp.list;
+          }
+          v = v || pp.v;
+          let argsStr = Object.keys(embedArgs)
+                              .map(k => `${k}=${embedArgs[k]}`)
+                              .join('&');
+          iframeUrl = `//www.youtube-nocookie.com/embed/${v}?${argsStr}`;
+        }
+        let iframe = makeIframe(iframeUrl, '100%', '360px');
+        iframe.onload = () => makeResizableToRatio(iframe, 9.0 / 16.0);
+        return setContent(div, iframe);
+      }
+    },
+    {
+      name: 'Vimeo videos',
+      id: 'embed_vimeo_videos',
+      className: 'vimeo resizableV',
+      ctsDefault: false,
+      re: /^(?:https?:)?\/\/(?:www\.)?(?:player\.)?vimeo\.com\/(?:video\/|album\/[\d]+\/video\/)?([\d]+)/i,
+      makeNode: function(aNode, reResult, div) {
+        let iframe = makeIframe('//player.vimeo.com/video/' + reResult[1], '100%', '360px');
+        iframe.onload = () => makeResizableToRatio(iframe, 9.0 / 16.0);
+        return setContent(div, iframe);
+      }
+    }
+  ];
+}
+
+function embedLink(aNode, linkTypes, container, afterNode) {
+  let anyEmbed = false;
+  let linkId = (aNode.href.replace(/^https?:/i, '').replace(/\'/gi,''));
+  let sameEmbed = container.querySelector(`*[data-linkid='${linkId}']`); // do not embed the same thing twice
+  if (sameEmbed === null) {
+    anyEmbed = [].some.call(linkTypes, function(linkType) {
+        let reResult = linkType.re.exec(aNode.href);
+        if (reResult) {
+          if (linkType.match && (linkType.match(aNode, reResult) === false)) { return false; }
+          let newNode = makeNewNode(linkType, aNode, reResult);
+          if (!newNode) { return false; }
+          newNode.setAttribute('data-linkid', linkId);
+          if (afterNode) {
+            insertAfter(newNode, afterNode);
+          } else {
+            container.appendChild(newNode);
+          }
+          aNode.classList.add('embedLink');
+          return true;
+        }
+    });
+  }
+  return anyEmbed;
+}
+
+function embedLinks(aNodes, container) {
+  let anyEmbed = false;
+  let embeddableLinkTypes = getEmbeddableLinkTypes();
+  Array.from(aNodes).forEach(aNode => {
+    let isEmbedded = embedLink(aNode, embeddableLinkTypes, container);
+    anyEmbed = anyEmbed || isEmbedded;
+  });
+  return anyEmbed;
+}
+
+/**
+ * Embed all the links inside element "x" that match to "allLinksSelector".
+ * All the embedded media is placed inside "div.embedContainer".
+ * "div.embedContainer" is inserted before an element matched by "beforeNodeSelector"
+ * if not present. Existing container is used otherwise.
+ *
+ * @param {Element} x
+ * @param {string} beforeNodeSelector
+ * @param {string} allLinksSelector
+ */
+function embedLinksToX(x, beforeNodeSelector, allLinksSelector) {
+  let isCtsPost = false;
+  let allLinks = x.querySelectorAll(allLinksSelector);
+
+  let existingContainer = x.querySelector('div.embedContainer');
+  if (existingContainer) {
+    embedLinks(allLinks, existingContainer);
+  } else {
+    let embedContainer = document.createElement('div');
+    embedContainer.className = 'embedContainer';
+
+    let anyEmbed = embedLinks(allLinks, embedContainer);
+    if (anyEmbed) {
+      let beforeNode = x.querySelector(beforeNodeSelector);
+      x.insertBefore(embedContainer, beforeNode);
+    }
+  }
+}
+
+function embedLinksToArticles() {
+  let beforeNodeSelector = 'nav.l';
+  let allLinksSelector = 'p:not(.ir) a, pre a';
+  Array.from(document.querySelectorAll('#content article')).forEach(article => {
+    embedLinksToX(article, beforeNodeSelector, allLinksSelector);
+  });
+}
+
+function embedLinksToPost() {
+  let beforeNodeSelector = '.msg-txt + *';
+  let allLinksSelector = '.msg-txt a';
+  Array.from(document.querySelectorAll('#content .msg-cont')).forEach(msg => {
+    embedLinksToX(msg, beforeNodeSelector, allLinksSelector);
+  });
+}
+
+/**
+ * Embed all the links in all messages/replies on the page.
+ */
+function embedAll() {
+  if (document.querySelector('#content article[data-mid]')) {
+    embedLinksToArticles();
+  } else {
+    embedLinksToPost();
+  }
+}
+
+exports.embedAll = embedAll;
+exports.embedLinksToX = embedLinksToX;
+exports.format = juickFormat;
diff --git a/vnext/yarn.lock b/vnext/yarn.lock
index 6081581d..5e77fbe7 100644
--- a/vnext/yarn.lock
+++ b/vnext/yarn.lock
@@ -883,10 +883,6 @@ babylon@^6.18.0:
   version "6.18.0"
   resolved "https://registry.yarnpkg.com/babylon/-/babylon-6.18.0.tgz#af2f3b88fa6f5c1e4c634d1a0f8eac4f55b395e3"
 
-bail@^1.0.0:
-  version "1.0.3"
-  resolved "https://registry.yarnpkg.com/bail/-/bail-1.0.3.tgz#63cfb9ddbac829b02a3128cd53224be78e6c21a3"
-
 balanced-match@^0.4.2:
   version "0.4.2"
   resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-0.4.2.tgz#cb3f3e3c732dc0f01ee70b403f302e61d7709838"
@@ -1142,18 +1138,6 @@ chalk@^2.0.1, chalk@^2.1.0, chalk@^2.3.0, chalk@^2.3.1, chalk@^2.3.2, chalk@^2.4
     escape-string-regexp "^1.0.5"
     supports-color "^5.3.0"
 
-character-entities-legacy@^1.0.0:
-  version "1.1.2"
-  resolved "https://registry.yarnpkg.com/character-entities-legacy/-/character-entities-legacy-1.1.2.tgz#7c6defb81648498222c9855309953d05f4d63a9c"
-
-character-entities@^1.0.0:
-  version "1.2.2"
-  resolved "https://registry.yarnpkg.com/character-entities/-/character-entities-1.2.2.tgz#58c8f371c0774ef0ba9b2aca5f00d8f100e6e363"
-
-character-reference-invalid@^1.0.0:
-  version "1.1.2"
-  resolved "https://registry.yarnpkg.com/character-reference-invalid/-/character-reference-invalid-1.1.2.tgz#21e421ad3d84055952dab4a43a04e73cd425d3ed"
-
 chokidar@^2.0.2:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/chokidar/-/chokidar-2.0.3.tgz#dcbd4f6cbb2a55b4799ba8a840ac527e5f4b1176"
@@ -1247,10 +1231,6 @@ code-point-at@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/code-point-at/-/code-point-at-1.1.0.tgz#0d070b4d043a5bea33a2f1a40e2edb3d9a4ccf77"
 
-collapse-white-space@^1.0.2:
-  version "1.0.4"
-  resolved "https://registry.yarnpkg.com/collapse-white-space/-/collapse-white-space-1.0.4.tgz#ce05cf49e54c3277ae573036a26851ba430a0091"
-
 collection-visit@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/collection-visit/-/collection-visit-1.0.0.tgz#4bc0373c164bc3291b4d368c829cf1a80a59dca0"
@@ -1939,10 +1919,6 @@ extend-shallow@^3.0.0, extend-shallow@^3.0.2:
     assign-symbols "^1.0.0"
     is-extendable "^1.0.1"
 
-extend@^3.0.0:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/extend/-/extend-3.0.1.tgz#a755ea7bc1adfcc5a31ce7e762dbaadc5e636444"
-
 extglob@^2.0.4:
   version "2.0.4"
   resolved "https://registry.yarnpkg.com/extglob/-/extglob-2.0.4.tgz#ad00fe4dc612a9232e8718711dc5cb5ab0285543"
@@ -2392,17 +2368,6 @@ is-accessor-descriptor@^1.0.0:
   dependencies:
     kind-of "^6.0.0"
 
-is-alphabetical@^1.0.0:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/is-alphabetical/-/is-alphabetical-1.0.2.tgz#1fa6e49213cb7885b75d15862fb3f3d96c884f41"
-
-is-alphanumerical@^1.0.0:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/is-alphanumerical/-/is-alphanumerical-1.0.2.tgz#1138e9ae5040158dc6ff76b820acd6b7a181fd40"
-  dependencies:
-    is-alphabetical "^1.0.0"
-    is-decimal "^1.0.0"
-
 is-arrayish@^0.2.1:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/is-arrayish/-/is-arrayish-0.2.1.tgz#77c99840527aa8ecb1a8ba697b80645a7a926a9d"
@@ -2413,7 +2378,7 @@ is-binary-path@^1.0.0:
   dependencies:
     binary-extensions "^1.0.0"
 
-is-buffer@^1.1.4, is-buffer@^1.1.5:
+is-buffer@^1.1.5:
   version "1.1.6"
   resolved "https://registry.yarnpkg.com/is-buffer/-/is-buffer-1.1.6.tgz#efaa2ea9daa0d7ab2ea13a97b2b8ad51fefbe8be"
 
@@ -2449,10 +2414,6 @@ is-date-object@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/is-date-object/-/is-date-object-1.0.1.tgz#9aa20eb6aeebbff77fbd33e74ca01b33581d3a16"
 
-is-decimal@^1.0.0:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/is-decimal/-/is-decimal-1.0.2.tgz#894662d6a8709d307f3a276ca4339c8fa5dff0ff"
-
 is-descriptor@^0.1.0:
   version "0.1.6"
   resolved "https://registry.yarnpkg.com/is-descriptor/-/is-descriptor-0.1.6.tgz#366d8240dde487ca51823b1ab9f07a10a78251ca"
@@ -2519,10 +2480,6 @@ is-glob@^4.0.0:
   dependencies:
     is-extglob "^2.1.1"
 
-is-hexadecimal@^1.0.0:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/is-hexadecimal/-/is-hexadecimal-1.0.2.tgz#b6e710d7d07bb66b98cb8cece5c9b4921deeb835"
-
 is-installed-globally@^0.1.0:
   version "0.1.0"
   resolved "https://registry.yarnpkg.com/is-installed-globally/-/is-installed-globally-0.1.0.tgz#0dfd98f5a9111716dd535dda6492f67bf3d25a80"
@@ -2598,18 +2555,10 @@ is-symbol@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/is-symbol/-/is-symbol-1.0.1.tgz#3cc59f00025194b6ab2e38dbae6689256b660572"
 
-is-whitespace-character@^1.0.0:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/is-whitespace-character/-/is-whitespace-character-1.0.2.tgz#ede53b4c6f6fb3874533751ec9280d01928d03ed"
-
 is-windows@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/is-windows/-/is-windows-1.0.2.tgz#d1850eb9791ecd18e6182ce12a30f396634bb19d"
 
-is-word-character@^1.0.0:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/is-word-character/-/is-word-character-1.0.2.tgz#46a5dac3f2a1840898b91e576cd40d493f3ae553"
-
 is-wsl@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/is-wsl/-/is-wsl-1.1.0.tgz#1f16e4aa22b04d1336b66188a66af3c600c3a66d"
@@ -2911,10 +2860,6 @@ map-visit@^1.0.0:
   dependencies:
     object-visit "^1.0.0"
 
-markdown-escapes@^1.0.0:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/markdown-escapes/-/markdown-escapes-1.0.2.tgz#e639cbde7b99c841c0bacc8a07982873b46d2122"
-
 math-expression-evaluator@^1.2.14:
   version "1.2.17"
   resolved "https://registry.yarnpkg.com/math-expression-evaluator/-/math-expression-evaluator-1.2.17.tgz#de819fdbcd84dccd8fae59c6aeb79615b9d266ac"
@@ -3451,17 +3396,6 @@ parse-asn1@^5.0.0:
     evp_bytestokey "^1.0.0"
     pbkdf2 "^3.0.3"
 
-parse-entities@^1.1.0:
-  version "1.1.2"
-  resolved "https://registry.yarnpkg.com/parse-entities/-/parse-entities-1.1.2.tgz#9eaf719b29dc3bd62246b4332009072e01527777"
-  dependencies:
-    character-entities "^1.0.0"
-    character-entities-legacy "^1.0.0"
-    character-reference-invalid "^1.0.0"
-    is-alphanumerical "^1.0.0"
-    is-decimal "^1.0.0"
-    is-hexadecimal "^1.0.0"
-
 parse-json@^2.2.0:
   version "2.2.0"
   resolved "https://registry.yarnpkg.com/parse-json/-/parse-json-2.2.0.tgz#f480f40434ef80741f8469099f8dea18f55a4dc9"
@@ -3978,16 +3912,6 @@ react-dom@^16.4.1:
     object-assign "^4.1.1"
     prop-types "^15.6.0"
 
-react-markdown@^3.3.3:
-  version "3.3.3"
-  resolved "https://registry.yarnpkg.com/react-markdown/-/react-markdown-3.3.3.tgz#1e57e63e9f4e87d2919a51d77815b803f4b7b5d6"
-  dependencies:
-    prop-types "^15.6.1"
-    remark-parse "^5.0.0"
-    unified "^6.1.5"
-    unist-util-visit "^1.3.0"
-    xtend "^4.0.1"
-
 react-router-dom@^4.3.1:
   version "4.3.1"
   resolved "https://registry.yarnpkg.com/react-router-dom/-/react-router-dom-4.3.1.tgz#4c2619fc24c4fa87c9fd18f4fb4a43fe63fbd5c6"
@@ -4139,26 +4063,6 @@ regjsparser@^0.1.4:
   dependencies:
     jsesc "~0.5.0"
 
-remark-parse@^5.0.0:
-  version "5.0.0"
-  resolved "https://registry.yarnpkg.com/remark-parse/-/remark-parse-5.0.0.tgz#4c077f9e499044d1d5c13f80d7a98cf7b9285d95"
-  dependencies:
-    collapse-white-space "^1.0.2"
-    is-alphabetical "^1.0.0"
-    is-decimal "^1.0.0"
-    is-whitespace-character "^1.0.0"
-    is-word-character "^1.0.0"
-    markdown-escapes "^1.0.0"
-    parse-entities "^1.1.0"
-    repeat-string "^1.5.4"
-    state-toggle "^1.0.0"
-    trim "0.0.1"
-    trim-trailing-lines "^1.0.0"
-    unherit "^1.0.4"
-    unist-util-remove-position "^1.0.0"
-    vfile-location "^2.0.0"
-    xtend "^4.0.1"
-
 remove-array-items@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/remove-array-items/-/remove-array-items-1.0.0.tgz#07bf42cb332f4cf6e85ead83b5e4e896d2326b21"
@@ -4171,7 +4075,7 @@ repeat-element@^1.1.2:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/repeat-element/-/repeat-element-1.1.2.tgz#ef089a178d1483baae4d93eb98b4f9e4e11d990a"
 
-repeat-string@^1.5.4, repeat-string@^1.6.1:
+repeat-string@^1.6.1:
   version "1.6.1"
   resolved "https://registry.yarnpkg.com/repeat-string/-/repeat-string-1.6.1.tgz#8dcae470e1c88abc2d600fff4a776286da75e637"
 
@@ -4181,10 +4085,6 @@ repeating@^2.0.0:
   dependencies:
     is-finite "^1.0.0"
 
-replace-ext@1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/replace-ext/-/replace-ext-1.0.0.tgz#de63128373fcbf7c3ccfa4de5a480c45a67958eb"
-
 require-from-string@^1.1.0:
   version "1.2.1"
   resolved "https://registry.yarnpkg.com/require-from-string/-/require-from-string-1.2.1.tgz#529c9ccef27380adfec9a2f965b649bbee636418"
@@ -4451,10 +4351,6 @@ ssri@^5.2.4:
   dependencies:
     safe-buffer "^5.1.1"
 
-state-toggle@^1.0.0:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/state-toggle/-/state-toggle-1.0.1.tgz#c3cb0974f40a6a0f8e905b96789eb41afa1cde3a"
-
 static-extend@^0.1.1:
   version "0.1.2"
   resolved "https://registry.yarnpkg.com/static-extend/-/static-extend-0.1.2.tgz#60809c39cbff55337226fd5e0b520f341f1fb5c6"
@@ -4687,18 +4583,6 @@ trim-right@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/trim-right/-/trim-right-1.0.1.tgz#cb2e1203067e0c8de1f614094b9fe45704ea6003"
 
-trim-trailing-lines@^1.0.0:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/trim-trailing-lines/-/trim-trailing-lines-1.1.1.tgz#e0ec0810fd3c3f1730516b45f49083caaf2774d9"
-
-trim@0.0.1:
-  version "0.0.1"
-  resolved "https://registry.yarnpkg.com/trim/-/trim-0.0.1.tgz#5858547f6b290757ee95cccc666fb50084c460dd"
-
-trough@^1.0.0:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/trough/-/trough-1.0.2.tgz#7f1663ec55c480139e2de5e486c6aef6cc24a535"
-
 tslib@^1.9.0:
   version "1.9.2"
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.9.2.tgz#8be0cc9a1f6dc7727c38deb16c2ebd1a2892988e"
@@ -4742,24 +4626,6 @@ uglifyjs-webpack-plugin@^1.2.4:
     webpack-sources "^1.1.0"
     worker-farm "^1.5.2"
 
-unherit@^1.0.4:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/unherit/-/unherit-1.1.1.tgz#132748da3e88eab767e08fabfbb89c5e9d28628c"
-  dependencies:
-    inherits "^2.0.1"
-    xtend "^4.0.1"
-
-unified@^6.1.5:
-  version "6.2.0"
-  resolved "https://registry.yarnpkg.com/unified/-/unified-6.2.0.tgz#7fbd630f719126d67d40c644b7e3f617035f6dba"
-  dependencies:
-    bail "^1.0.0"
-    extend "^3.0.0"
-    is-plain-obj "^1.1.0"
-    trough "^1.0.0"
-    vfile "^2.0.0"
-    x-is-string "^0.1.0"
-
 union-value@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/union-value/-/union-value-1.0.0.tgz#5c71c34cb5bad5dcebe3ea0cd08207ba5aa1aea4"
@@ -4795,26 +4661,6 @@ unique-string@^1.0.0:
   dependencies:
     crypto-random-string "^1.0.0"
 
-unist-util-is@^2.1.1:
-  version "2.1.2"
-  resolved "https://registry.yarnpkg.com/unist-util-is/-/unist-util-is-2.1.2.tgz#1193fa8f2bfbbb82150633f3a8d2eb9a1c1d55db"
-
-unist-util-remove-position@^1.0.0:
-  version "1.1.2"
-  resolved "https://registry.yarnpkg.com/unist-util-remove-position/-/unist-util-remove-position-1.1.2.tgz#86b5dad104d0bbfbeb1db5f5c92f3570575c12cb"
-  dependencies:
-    unist-util-visit "^1.1.0"
-
-unist-util-stringify-position@^1.0.0, unist-util-stringify-position@^1.1.1:
-  version "1.1.2"
-  resolved "https://registry.yarnpkg.com/unist-util-stringify-position/-/unist-util-stringify-position-1.1.2.tgz#3f37fcf351279dcbca7480ab5889bb8a832ee1c6"
-
-unist-util-visit@^1.1.0, unist-util-visit@^1.3.0:
-  version "1.3.1"
-  resolved "https://registry.yarnpkg.com/unist-util-visit/-/unist-util-visit-1.3.1.tgz#c019ac9337a62486be58531bc27e7499ae7d55c7"
-  dependencies:
-    unist-util-is "^2.1.1"
-
 unset-value@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/unset-value/-/unset-value-1.0.0.tgz#8376873f7d2335179ffb1e6fc3a8ed0dfc8ab559"
@@ -4919,25 +4765,6 @@ vendors@^1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/vendors/-/vendors-1.0.2.tgz#7fcb5eef9f5623b156bcea89ec37d63676f21801"
 
-vfile-location@^2.0.0:
-  version "2.0.3"
-  resolved "https://registry.yarnpkg.com/vfile-location/-/vfile-location-2.0.3.tgz#083ba80e50968e8d420be49dd1ea9a992131df77"
-
-vfile-message@^1.0.0:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/vfile-message/-/vfile-message-1.0.1.tgz#51a2ccd8a6b97a7980bb34efb9ebde9632e93677"
-  dependencies:
-    unist-util-stringify-position "^1.1.1"
-
-vfile@^2.0.0:
-  version "2.3.0"
-  resolved "https://registry.yarnpkg.com/vfile/-/vfile-2.3.0.tgz#e62d8e72b20e83c324bc6c67278ee272488bf84a"
-  dependencies:
-    is-buffer "^1.1.4"
-    replace-ext "1.0.0"
-    unist-util-stringify-position "^1.0.0"
-    vfile-message "^1.0.0"
-
 vm-browserify@0.0.4:
   version "0.0.4"
   resolved "https://registry.yarnpkg.com/vm-browserify/-/vm-browserify-0.0.4.tgz#5d7ea45bbef9e4a6ff65f95438e0a87c357d5a73"
@@ -5155,10 +4982,6 @@ ws@^4.0.0:
     async-limiter "~1.0.0"
     safe-buffer "~5.1.0"
 
-x-is-string@^0.1.0:
-  version "0.1.0"
-  resolved "https://registry.yarnpkg.com/x-is-string/-/x-is-string-0.1.0.tgz#474b50865af3a49a9c4657f05acd145458f77d82"
-
 xdg-basedir@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/xdg-basedir/-/xdg-basedir-3.0.0.tgz#496b2cc109eca8dbacfe2dc72b603c17c5870ad4"
@@ -5167,7 +4990,7 @@ xregexp@4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/xregexp/-/xregexp-4.0.0.tgz#e698189de49dd2a18cc5687b05e17c8e43943020"
 
-xtend@^4.0.0, xtend@^4.0.1, xtend@~4.0.1:
+xtend@^4.0.0, xtend@~4.0.1:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/xtend/-/xtend-4.0.1.tgz#a5c6d532be656e23db820efb943a1f04998d63af"