Move reminders to new persisted state layer (#1834)

src/state/shell/reminders.ts

@@ -0,0 +1,40 @@
+import * as persisted from '#/state/persisted'
+import {OnboardingModel} from '../models/discovery/onboarding'
+import {SessionModel} from '../models/session'
+import {toHashCode} from 'lib/strings/helpers'
+
+export function shouldRequestEmailConfirmation(
+  session: SessionModel,
+  onboarding: OnboardingModel,
+) {
+  const sess = session.currentSession
+  if (!sess) {
+    return false
+  }
+  if (sess.emailConfirmed) {
+    return false
+  }
+  if (onboarding.isActive) {
+    return false
+  }
+  // only prompt once
+  if (persisted.get('reminders').lastEmailConfirm) {
+    return false
+  }
+  const today = new Date()
+  // shard the users into 2 day of the week buckets
+  // (this is to avoid a sudden influx of email updates when
+  // this feature rolls out)
+  const code = toHashCode(sess.did) % 7
+  if (code !== today.getDay() && code !== (today.getDay() + 1) % 7) {
+    return false
+  }
+  return true
+}
+
+export function setEmailConfirmationRequested() {
+  persisted.write('reminders', {
+    ...persisted.get('reminders'),
+    lastEmailConfirm: new Date().toISOString(),
+  })
+}