Change getCycleDay signature and process LocalDate

home.js

@@ -5,18 +5,30 @@ import {
   Text
 } from 'react-native'
 import styles from './styles'
-import getCycleDay from './get-cycle-day'
+import cycleDayModule from './get-cycle-day-number'
+import { getCycleDaysSortedByDateView, deleteAll } from './db'
+import { LocalDate } from 'js-joda'
+
+const cycleDaysSortedByDateView = getCycleDaysSortedByDateView()
+const getCycleDayNumber = cycleDayModule(cycleDaysSortedByDateView)
+const now = new Date()
+const cycleDayNumber = getCycleDayNumber(LocalDate.of(now.getFullYear(), now.getMonth() + 1, now.getDate()))
+const welcomeTextWithCycleDay = `Welcome! Today is day ${cycleDayNumber} of your current cycle`
+const welcomeText = `Welcome! We don't have enough information to know what your current cycle day is`
 
 export default class Home extends Component {
   constructor(props) {
     super(props)
+    this.state = {
+      welcomeText: cycleDayNumber ? welcomeTextWithCycleDay : welcomeText
+    }
   }
 
   render() {
     const navigate = this.props.navigation.navigate
     return (
       <View style={styles.container}>
-        <Text style={styles.welcome}>Welcome! Today is day {getCycleDay()} of your current cycle</Text>
+        <Text style={styles.welcome}>{this.state.welcomeText}</Text>
         <Button
           onPress={() => navigate('temperatureList')}
           title="Edit symptoms for today">
@@ -25,7 +37,11 @@ export default class Home extends Component {
           onPress={() => navigate('calendar')}
           title="Go to calendar">
         </Button>
+        <Button
+          onPress={() => deleteAll()}
+          title="delete everything">
+        </Button>
       </View>
     )
   }
-}
+}