Add missing component code.

src/components/chat/chat.js

@@ -0,0 +1,26 @@
+const chat = {
+  data () {
+    return {
+      messages: [],
+      currentMessage: '',
+      socket: this.$store.state.users.socket,
+      channel: null
+    }
+  },
+  created () {
+    this.channel = this.socket.channel('chat:public')
+    this.channel.on('new_msg', (msg) => {
+      this.messages.push(msg)
+      this.messages = this.messages.slice(-19, 20)
+    })
+    this.channel.join()
+  },
+  methods: {
+    submit(message) {
+      this.channel.push('new_msg', {text: message}, 10000)
+      this.currentMessage = '';
+    }
+  }
+}
+
+export default chat;

src/components/chat/chat.vue

@@ -0,0 +1,49 @@
+<template>
+  <div class="chat-panel panel panel-default">
+    <div class="panel-heading timeline-heading base02-background base04">
+      <div class="title">
+        {{$t('chat.title')}}
+      </div>
+    </div>
+    <div class="panel-body base01-background">
+      <div class="chat-window">
+        <div class="chat-message" v-for="message in messages">
+          <span class="chat-avatar">
+            <img :src="message.author.avatar" />
+            {{message.author.username}}:
+          </span>
+          <span class="chat-text">
+            {{message.text}}
+          </span>
+        </div>
+      </div>
+      <div class="chat-input">
+        <input v-model="currentMessage" type="text" @keyup.enter="submit(currentMessage)">
+      </div>
+    </div>
+  </div>
+</template>
+
+<script src="./chat.js"></script>
+
+
+<style lang="scss">
+ .chat-message {
+   padding: 0.2em 0.5em
+ }
+ .chat-avatar {
+     img {
+         height: 32px;
+         width: 32px;
+         border-radius: 5px;
+         margin-right: 0.5em;
+     }
+ }
+ .chat-input {
+     display: flex;
+     input {
+         flex: auto;
+         margin: 0.5em;
+     }
+ }
+</style>