drip/components/cycle-day/symptoms/temperature.js

import React, { Component } from 'react'
import {
  View,
  Text,
  TextInput,
  Switch,
  Keyboard,
  ScrollView
} from 'react-native'
import DateTimePicker from 'react-native-modal-datetime-picker-nevo'

import { getPreviousTemperature, saveSymptom } from '../../../db'
import styles from '../../../styles'
import { LocalTime, ChronoUnit } from 'js-joda'
import ActionButtonFooter from './action-button-footer'

const MINUTES = ChronoUnit.MINUTES

export default class Temp extends Component {
  constructor(props) {
    super(props)
    this.cycleDay = props.cycleDay
    this.makeActionButtons = props.makeActionButtons
    let initialValue

    const temp = this.cycleDay.temperature

    if (temp) {
      initialValue = temp.value.toString()
      this.time = temp.time
    } else {
      const prevTemp = getPreviousTemperature(this.cycleDay)
      initialValue = prevTemp ? prevTemp.toString() : ''
    }

    this.state = {
      currentValue: initialValue,
      exclude: temp ? temp.exclude : false,
      time: this.time || LocalTime.now().truncatedTo(MINUTES).toString(),
      isTimePickerVisible: false
    }
  }

  render() {
    return (
      <View style={{ flex: 1 }}>
        <ScrollView>
          <View>
            <View style={styles.symptomViewRowInline}>
              <Text style={styles.symptomDayView}>Temperature (°C)</Text>
              <TextInput
                style={styles.temperatureTextInput}
                placeholder="Enter"
                onChangeText={(val) => {
                  this.setState({ currentValue: val })
                }}
                keyboardType='numeric'
                value={this.state.currentValue}
              />
            </View>
            <View style={styles.symptomViewRowInline}>
              <Text style={styles.symptomDayView}>Time</Text>
              <TextInput
                style={styles.temperatureTextInput}
                onFocus={() => {
                  Keyboard.dismiss()
                  this.setState({ isTimePickerVisible: true })
                }}
                value={this.state.time}
              />
            </View>
            <DateTimePicker
              mode="time"
              isVisible={this.state.isTimePickerVisible}
              onConfirm={jsDate => {
                this.setState({
                  time: `${jsDate.getHours()}:${jsDate.getMinutes()}`,
                  isTimePickerVisible: false
                })
              }}
              onCancel={() => this.setState({ isTimePickerVisible: false })}
            />
            <View style={styles.symptomViewRowInline}>
              <Text style={styles.symptomDayView}>Exclude</Text>
              <Switch
                onValueChange={(val) => {
                  this.setState({ exclude: val })
                }}
                value={this.state.exclude}
              />
            </View>
          </View>
        </ScrollView>
        <ActionButtonFooter
          symptom='temperature'
          cycleDay={this.cycleDay}
          saveAction={() => {
            const dataToSave = {
              value: Number(this.state.currentValue),
              exclude: this.state.exclude,
              time: this.state.time
            }
            saveSymptom('temperature', this.props.cycleDay, dataToSave)
          }}
          saveDisabled={this.state.currentValue === '' || isInvalidTime(this.state.time)}
          navigate={this.props.navigate}
        />
      </View>
    )
  }
}

function isInvalidTime(timeString) {
  try {
    LocalTime.parse(timeString)
  } catch (err) {
    return true
  }
  return false
}