Push notification & session management cleanup (#92)

* Add some temporary logging to help suss out the session drop issue

* Fix to session resumption: copy session tokens during a resumeSession attempt

* Factor out notifee display into a lib and add to storybook

* Tune the bg notifications fetch to only get what is needed

* Fix: run account update inside a mobx action

* Remove debugging logs for sessions

* Fixes to bg notifications fetch

src/view/lib/notifee.ts

@@ -0,0 +1,54 @@
+import notifee from '@notifee/react-native'
+import {AppBskyEmbedImages} from '@atproto/api'
+import {NotificationsViewItemModel} from '../../state/models/notifications-view'
+import {enforceLen} from '../../lib/strings'
+
+export function displayNotification(
+  title: string,
+  body?: string,
+  image?: string,
+) {
+  const opts: {title: string; body?: string; ios?: any} = {title}
+  if (body) {
+    opts.body = enforceLen(body, 70, true)
+  }
+  if (image) {
+    opts.ios = {
+      attachments: [{url: image}],
+    }
+  }
+  return notifee.displayNotification(opts)
+}
+
+export function displayNotificationFromModel(
+  notif: NotificationsViewItemModel,
+) {
+  let author = notif.author.displayName || notif.author.handle
+  let title: string
+  let body: string = ''
+  if (notif.isUpvote) {
+    title = `${author} liked your post`
+    body = notif.additionalPost?.thread?.postRecord?.text || ''
+  } else if (notif.isRepost) {
+    title = `${author} reposted your post`
+    body = notif.additionalPost?.thread?.postRecord?.text || ''
+  } else if (notif.isMention) {
+    title = `${author} mentioned you`
+    body = notif.additionalPost?.thread?.postRecord?.text || ''
+  } else if (notif.isReply) {
+    title = `${author} replied to your post`
+    body = notif.additionalPost?.thread?.postRecord?.text || ''
+  } else if (notif.isFollow) {
+    title = `${author} followed you`
+  } else {
+    return
+  }
+  let image
+  if (
+    AppBskyEmbedImages.isPresented(notif.additionalPost?.thread?.post.embed) &&
+    notif.additionalPost?.thread?.post.embed.images[0]?.thumb
+  ) {
+    image = notif.additionalPost.thread.post.embed.images[0].thumb
+  }
+  return displayNotification(title, body, image)
+}