Migrate rich-message.js to its new home.

Author: Flet

lib/rich-message.js

@@ -0,0 +1,70 @@
+module.exports = makeRichMessage
+module.exports.mergeMessages = mergeMessages
+
+var emoji = require('markdown-it-emoji')
+var ghlink = require('ghlink')
+var higlight = require('highlight.js')
+var htmlToVDom = require('html-to-vdom')
+var MarkdownIt = require('markdown-it')
+var twemoji = require('twemoji')
+var util = require('./util.js')
+var VNode = require('virtual-dom/vnode/vnode')
+var VText = require('virtual-dom/vnode/vtext')
+
+var md = new MarkdownIt({
+  linkify: true,
+  highlight: function (str, lang) {
+    if (lang && higlight.getLanguage(lang)) {
+      try {
+        return higlight.highlight(lang, str).value
+      } catch (err) {}
+    }
+
+    try {
+      return higlight.highlightAuto(str).value
+    } catch (err) {}
+
+    return '' // use external default escaping
+  }
+}).use(emoji)
+
+md.renderer.rules.emoji = function (token, index) {
+  return twemoji.parse(token[index].content)
+}
+
+var convertHTML = htmlToVDom({
+  VNode: VNode,
+  VText: VText
+})
+
+function makeVDom (html) {
+  return convertHTML('<div class="text">' + html + '</div>')
+}
+
+function makeRichMessage (message, username) {
+  message.anon = /Anonymous/i.test(message.username)
+  message.avatar = message.anon
+    ? 'static/cat.png'
+    : 'https://github.com/' + message.username + '.png'
+  message.timeago = util.timeago(message.timestamp)
+
+  message.html = md.render(message.text)
+  message.html = message.html.replace(/\n/g, '<p></p>')
+  message.html = ghlink(message.html, { format: 'html' })
+  message.html = message.html.replace(/(^| )(#[a-zA-Z0-9]+)( |$)$/g, '$1<a href="$2">$2</a>$3')
+
+  var highlight = (message.text.indexOf(username) !== -1)
+  var classStr = highlight ? ' class="highlight"' : ''
+  message.html = '<div' + classStr + '>' + message.html + '</div>'
+
+  message.vdom = makeVDom(message.html)
+
+  return message
+}
+
+function mergeMessages (message1, message2) {
+  message1.text += '\n' + message2.text
+  message1.html += '<p></p>' + message2.html
+  message1.vdom = makeVDom(message1.html)
+  return message1
+}

lib/util.js

@@ -0,0 +1,7 @@
+var moment = require('moment')
+
+exports.timeago = function (milliseconds) {
+  var timeago = moment(milliseconds).calendar()
+  if (timeago.indexOf('Today at ') === 0) return timeago.substring(9)
+  return timeago
+}