Merge remote-tracking branch 'upstream/develop' into mobile-back

* upstream/develop: (142 commits)
  fix timeago font
  added hide_network option, fixed properties naming
  Fix fetching new users, add storing local users in usersObjects with their screen_name as well as id, so that they could be fetched zero-state with screen-name link.
  improve notification subscription
  Fix typo that prevented scope copy from working.
  added check for activatePanel is function or not
  addressed PR comments
  activate panel on user screen click
  added not preload check so hidden toggles asap
  removed counters from left panel
  added router-links to all relavent links
  added activatePanel onclick for timeago button
  added PR comments
  add checkbox to disable web push
  removed brackets from condition
  resolved lint issue
  renamed config to preload images and add ident to config
  added config for preload and made attachment responsive to it
  preload nsfw image
  fix
  ...

1 files changed, 69 insertions, 0 deletions

diff --git a/src/services/push/push.js b/src/services/push/push.js
new file mode 100644
index 00000000..1ac304d1
--- /dev/null
+++ b/src/services/push/push.js
@@ -0,0 +1,69 @@
+import runtime from 'serviceworker-webpack-plugin/lib/runtime'
+
+function urlBase64ToUint8Array (base64String) {
+  const padding = '='.repeat((4 - base64String.length % 4) % 4)
+  const base64 = (base64String + padding)
+    .replace(/-/g, '+')
+    .replace(/_/g, '/')
+
+  const rawData = window.atob(base64)
+  return Uint8Array.from([...rawData].map((char) => char.charCodeAt(0)))
+}
+
+function isPushSupported () {
+  return 'serviceWorker' in navigator && 'PushManager' in window
+}
+
+function registerServiceWorker () {
+  return runtime.register()
+    .catch((err) => console.error('Unable to register service worker.', err))
+}
+
+function subscribe (registration, isEnabled, vapidPublicKey) {
+  if (!isEnabled) return Promise.reject(new Error('Web Push is disabled in config'))
+  if (!vapidPublicKey) return Promise.reject(new Error('VAPID public key is not found'))
+
+  const subscribeOptions = {
+    userVisibleOnly: true,
+    applicationServerKey: urlBase64ToUint8Array(vapidPublicKey)
+  }
+  return registration.pushManager.subscribe(subscribeOptions)
+}
+
+function sendSubscriptionToBackEnd (subscription, token) {
+  return window.fetch('/api/v1/push/subscription/', {
+    method: 'POST',
+    headers: {
+      'Content-Type': 'application/json',
+      'Authorization': `Bearer ${token}`
+    },
+    body: JSON.stringify({
+      subscription,
+      data: {
+        alerts: {
+          follow: true,
+          favourite: true,
+          mention: true,
+          reblog: true
+        }
+      }
+    })
+  })
+    .then((response) => {
+      if (!response.ok) throw new Error('Bad status code from server.')
+      return response.json()
+    })
+    .then((responseData) => {
+      if (!responseData.id) throw new Error('Bad response from server.')
+      return responseData
+    })
+}
+
+export default function registerPushNotifications (isEnabled, vapidPublicKey, token) {
+  if (isPushSupported()) {
+    registerServiceWorker()
+      .then((registration) => subscribe(registration, isEnabled, vapidPublicKey))
+      .then((subscription) => sendSubscriptionToBackEnd(subscription, token))
+      .catch((e) => console.warn(`Failed to setup Web Push Notifications: ${e.message}`))
+  }
+}