Add desktop chat notifications

src/services/chat_utils/chat_utils.js

@@ -0,0 +1,18 @@
+import { showDesktopNotification } from '../desktop_notification_utils/desktop_notification_utils.js'
+
+export const maybeShowChatNotification = (store, chat) => {
+  if (!chat.lastMessage) return
+
+  const opts = {
+    tag: chat.lastMessage.id,
+    title: chat.account.name,
+    icon: chat.account.profile_image_url,
+    body: chat.lastMessage.content
+  }
+
+  if (chat.lastMessage.attachment && chat.lastMessage.attachment.type === 'image') {
+    opts.image = chat.lastMessage.attachment.preview_url
+  }
+
+  showDesktopNotification(store.rootState, opts)
+}