First attempt at notifying at given time

components/app.js

@@ -10,6 +10,7 @@ import Chart from './chart/chart'
 import Settings from './settings'
 import Stats from './stats'
 import {headerTitles as titles} from './labels'
+import setupNotifications from '../lib/notifications'
 
 const isSymptomView = name => Object.keys(symptomViews).indexOf(name) > -1
 
@@ -60,4 +61,6 @@ export default class App extends Component {
       </View>
     )
   }
-}
+}
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+
+setupNotifications()
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components/home.js

@@ -9,7 +9,6 @@ import { LocalDate } from 'js-joda'
 import styles from '../styles/index'
 import cycleModule from '../lib/cycle'
 import { getOrCreateCycleDay, bleedingDaysSortedByDate, fillWithDummyData, deleteAll } from '../db'
-import {NotificationsAndroid} from 'react-native-notifications'
 
 const getCycleDayNumber = cycleModule().getCycleDayNumber
 

lib/notifications.js

+import {tempReminderObservable} from '../local-storage'
+import { LocalTime, ChronoUnit } from 'js-joda'
+import {NotificationsAndroid} from 'react-native-notifications'
+
+let stopCheckingTheTime = () => {}
+
+export default function setupNotifications() {
+  tempReminderObservable(reminder => {
+    stopCheckingTheTime()
+    if (reminder.enabled) {
+      stopCheckingTheTime = notifyAt(reminder.time)
+    }
+  })
+}
+
+function notifyAt(time) {
+  const id = setInterval(() => {
+    const now = LocalTime.now().truncatedTo(ChronoUnit.MINUTES).toString()
+    if (now === time) {
+      NotificationsAndroid.localNotification({
+        title: 'yo',
+        body: 'much notification'
+      })
+    }
+  }, 60 * 1000)
+  return () => clearInterval(id)
+}
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