crazycharge-app/component/registrationMultiStepForm/formComponent/form.tsx

import { useState } from 'react';
import {
    View,
    Text,
    StyleSheet,
    Pressable,
    TouchableWithoutFeedback,
    Keyboard
} from 'react-native';
import Verification from './formPages/verification';
import BasicInformation from './formPages/basicInformation';
import UberDriver from './formPages/uberDriver';
import CarInformation from './formPages/carInformation';
import PaginationIndicator from '../../global/PaginationIndicator';
import CreateWallet from './formPages/createWallet';
import FinishSignUp from './formPages/finishSignUp';
import LoginPage from './formPages/loginPage';
import { KeyboardAwareScrollView } from 'react-native-keyboard-aware-scroll-view';

type FormProps = {};
const Form: React.FC<FormProps> = ({}) => {
    const [screen, setScreen] = useState<number>(0);
    const FormTitle = [
        '',
        '註冊 - 電話驗證',
        '註冊 - 基本資料',
        '註冊 - Uber Driver',
        '註冊 - 車輛資料',
        '註冊 - 設立銀包'
    ];

    const ScreenDisplay = () => {
        switch (screen) {
            case 0:
                return <LoginPage goToNextPage={goToNextPage} />;
            case 1:
                return <Verification setScreen={setScreen} />;
            case 2:
                return <BasicInformation goToNextPage={goToNextPage} />;
            case 3:
                return <UberDriver goToNextPage={goToNextPage} />;
            case 4:
                return <CarInformation goToNextPage={goToNextPage} />;
            case 5:
                return <CreateWallet goToNextPage={goToNextPage} />;
            case 6:
                return <FinishSignUp />;
            default:
                return <></>;
        }
    };

    const goToPreviousPage = () => {
        setScreen((prevState) => {
            if (prevState > 0) {
                return prevState - 1;
            } else {
                return prevState;
            }
        });
    };

    const goToNextPage = () => {
        setScreen((prevState) => {
            if (prevState < 6) {
                return prevState + 1;
            } else {
                return prevState;
            }
        });
    };

    return (
        <>
            <KeyboardAwareScrollView
                enableOnAndroid={true}
                resetScrollToCoords={{ x: 0, y: 0 }}
            >
                {/* not showing title and pagination on the first and last page */}
                {screen == 0 ||
                    (screen < 6 && (
                        //dismiss keyboard when user click outside of the input field to improve user experience
                        <TouchableWithoutFeedback
                            onPress={() => Keyboard.dismiss()}
                        >
                            <View style={styles.topContainer}>
                                <Text style={styles.text}>
                                    {FormTitle[screen]}
                                </Text>
                                <View style={styles.breakline} />
                                <View
                                    style={
                                        styles.previouspageAndPaginationWrapper
                                    }
                                >
                                    <Pressable onPress={goToPreviousPage}>
                                        <Text
                                            style={{ color: '#888888' }}
                                        >{`<  上一步`}</Text>
                                    </Pressable>
                                    <PaginationIndicator
                                        totalPages={FormTitle.length}
                                        currentPage={screen}
                                    />
                                    <Pressable
                                        disabled={true}
                                        onPress={goToNextPage}
                                    >
                                        <Text
                                            style={{
                                                color: '#888888',
                                                opacity: 0
                                            }}
                                        >{`下一步  >`}</Text>
                                    </Pressable>
                                </View>
                            </View>
                        </TouchableWithoutFeedback>
                    ))}

                <View style={styles.bottomContainer}>{ScreenDisplay()}</View>
            </KeyboardAwareScrollView>
        </>
    );
};

const styles = StyleSheet.create({
    topContainer: {
        flex: 1,
        alignItems: 'center',
        justifyContent: 'center',
        paddingBottom: '20%',
        paddingTop: '15%'
    },
    previouspageAndPaginationWrapper: {
        display: 'flex',
        width: '100%',
        flexDirection: 'row',
        justifyContent: 'space-between',
        alignItems: 'center',
        paddingHorizontal: 25
    },
    bottomContainer: { flex: 2.5 },
    breakline: {
        width: 24,
        height: 1,
        backgroundColor: '#000000',
        marginVertical: 17
    },
    text: { fontSize: 24, fontWeight: '300' }
});

export default Form;