tries to enable notifications for next period

components/labels.js

@@ -57,7 +57,7 @@ export const settings = {
   periodReminder: {
     title: 'Next period reminder',
     reminderText: 'Get a notification 3 days before your next period is likely to start.',
-    notification: 'your next period is likely to start in x days.'
+    notification: daysToEndOfPrediction => `Your next period is likely to start in 3 to ${daysToEndOfPrediction} days.`
   },
   passwordSettings: {
     title: 'App password',

components/settings/period-reminder.js

@@ -14,7 +14,7 @@ import { settings as labels } from '../labels'
 export default class PeriodReminderPicker extends Component {
   constructor(props) {
     super(props)
-    this.state = Object.assign({}, periodReminderObservable.value)
+    this.state = periodReminderObservable.value
   }
 
   render() {
@@ -31,7 +31,7 @@ export default class PeriodReminderPicker extends Component {
             value={this.state.enabled}
             onValueChange={switchOn => {
               this.setState({ enabled: switchOn })
-              savePeriodReminder({enabled: true})
+              savePeriodReminder({enabled: switchOn})
             }}
           />
         </View>

lib/notifications.js

@@ -1,21 +1,28 @@
-import {tempReminderObservable} from '../local-storage'
+import {tempReminderObservable, periodReminderObservable} from '../local-storage'
 import Notification from 'react-native-push-notification'
 import { LocalDate } from 'js-joda'
 import Moment from 'moment'
 import { settings as labels } from '../components/labels'
 import { getOrCreateCycleDay } from '../db'
+import cycleModule from './cycle'
 
 export default function setupNotifications(navigate) {
   Notification.configure({
     onNotification: () => {
       const todayDateString = LocalDate.now().toString()
       const cycleDay = getOrCreateCycleDay(todayDateString)
-      navigate('TemperatureEditView', { cycleDay })
+      if (this.id === '1') {
+        navigate('TemperatureEditView', { cycleDay })
+      } else if (this.id === '2') {
+        navigate('Home')
+      } else {
+        navigate('Home')
+      }
     }
   })
 
   tempReminderObservable(reminder => {
-    Notification.cancelAllLocalNotifications()
+    Notification.cancelAllLocalNotifications({id: '1'})
     if (reminder.enabled) {
       const [hours, minutes] = reminder.time.split(':')
       let target = new Moment()
@@ -28,6 +35,7 @@ export default function setupNotifications(navigate) {
       }
 
       Notification.localNotificationSchedule({
+        id: '1',
         message: labels.tempReminder.notification,
         date: target.toDate(),
         vibrate: false,
@@ -35,4 +43,24 @@ export default function setupNotifications(navigate) {
       })
     }
   })
+
+  periodReminderObservable(reminder => {
+    if (reminder.enabled) {
+      const bleedingPrediction = cycleModule().getPredictedMenses()
+      if (bleedingPrediction.length > 0) {
+        const bleedingStart = LocalDate.parse(bleedingPrediction[0][0])
+        const reminderDate = bleedingStart.minusDays(3)
+        // period is likely to start in 3 to 3 + (length of prediction - 1) days
+        const daysToEndOfPrediction = bleedingPrediction[0].length + 2
+
+        Notification.localNotificationSchedule({
+          id: '2',
+          message: labels.periodReminder.notification(daysToEndOfPrediction),
+          date: reminderDate,
+          vibrate: false,
+          onNotification: navigate('Home')
+        })
+      }
+    }
+  })
 }