Fix ordinal suffix for numbers greater than 10

components/chart/cycle-day-label.js

@@ -7,7 +7,7 @@ import moment from 'moment'
 import AppText from '../common/app-text'
 
 import cycleModule from '../../lib/cycle'
-import { dateEnding } from '../helpers/home'
+import { getOrdinalSuffix } from '../helpers/home'
 import { Containers, Typography } from '../../styles'
 
 const CycleDayLabel = ({ height, date }) => {
@@ -18,13 +18,13 @@ const CycleDayLabel = ({ height, date }) => {
   const dateFormatting = isFirstDayOfMonth ? 'MMM' : 'D'
   const shortDate = moment(date, "YYYY-MM-DD").format(dateFormatting)
   const ending = isFirstDayOfMonth ?
-    '' : dateEnding[this.cycleDayNumber] || dateEnding['default']
+    '' : getOrdinalSuffix(this.cycleDayNumber)
   const cycleDayLabel = cycleDayNumber ? cycleDayNumber : ' '
 
   return (
     <View style={[styles.container, { height }]}>
       <AppText style={styles.textBold}>{cycleDayLabel}</AppText>
-      <View style={{flexDirection: 'row', justifyContent: 'space-around', alignItems: 'center'}}>
+      <View style={{ flexDirection: 'row', justifyContent: 'space-around', alignItems: 'center' }}>
         <AppText style={styles.text}>{shortDate}</AppText>
         <AppText style={styles.textLight}>{ending}</AppText>
       </View>

components/helpers/home.js

@@ -12,7 +12,7 @@ function getTimes(prediction) {
   const predictedBleedingStart = LocalDate.parse(prediction[0][0])
   /* the range of predicted bleeding days can be either 3 or 5 */
   const predictedBleedingEnd =
-    LocalDate.parse(prediction[0][ prediction[0].length - 1 ])
+    LocalDate.parse(prediction[0][prediction[0].length - 1])
   const daysToEnd = todayDate.until(predictedBleedingEnd, ChronoUnit.DAYS)
   return { todayDate, predictedBleedingStart, predictedBleedingEnd, daysToEnd }
 }
@@ -63,9 +63,15 @@ export function getBleedingPredictionRange(prediction) {
   return (daysToEnd === 0 ? '0' : `0 - ${daysToEnd}`)
 }
 
-export const dateEnding = {
-  '1': 'st',
-  '2': 'nd',
-  '3': 'rd',
-  'default': 'th'
-}
+export function getOrdinalSuffix(num) {
+  const suffixes = {
+    1: 'st',
+    2: 'nd',
+    3: 'rd',
+    default: 'th'
+  }
+
+  const numAsString = num.toString()
+  const lastNumber = numAsString[numAsString.length - 1]
+  return suffixes[lastNumber] || suffixes.default
+}
\ No newline at end of file

components/home.js

@@ -13,7 +13,7 @@ import Button from './common/button'
 
 import cycleModule from '../lib/cycle'
 import { getFertilityStatusForDay } from '../lib/sympto-adapter'
-import { determinePredictionText, dateEnding } from './helpers/home'
+import { determinePredictionText, getOrdinalSuffix } from './helpers/home'
 
 import { Colors, Fonts, Sizes, Spacing } from '../styles'
 import { home as labels } from '../i18n/en/labels'
@@ -32,15 +32,15 @@ class Home extends Component {
     this.todayDateString = today.toString()
     const { getCycleDayNumber, getPredictedMenses } = cycleModule()
     this.cycleDayNumber = getCycleDayNumber(this.todayDateString)
-    const {status, phase, statusText} =
+    const { status, phase, statusText } =
       getFertilityStatusForDay(this.todayDateString)
     const prediction = getPredictedMenses()
 
     this.cycleDayText = !this.cycleDayNumber ? labels.cycleDayNotEnoughInfo
-      : `${this.cycleDayNumber}${dateEnding[this.cycleDayNumber] || dateEnding['default']}`
+      : `${this.cycleDayNumber}${getOrdinalSuffix(this.cycleDayNumber)}`
     this.phase = phase
     this.phaseText = !phase ? statusText
-      : `${phase}${dateEnding[phase] || dateEnding['default']}`
+      : `${phase}${getOrdinalSuffix(phase)}`
     this.prediction = determinePredictionText(prediction)
     this.status = status
     this.statusText = statusText
@@ -149,13 +149,13 @@ const styles = StyleSheet.create({
 })
 
 const mapStateToProps = (state) => {
-  return({
+  return ({
     date: getDate(state),
   })
 }
 
 const mapDispatchToProps = (dispatch) => {
-  return({
+  return ({
     navigate: (page) => dispatch(navigate(page)),
     setDate: (date) => dispatch(setDate(date)),
   })