ppc_amnet/amnet-native/app/card/ManualCardEntry.tsx

import {StatusBar} from "expo-status-bar";
import {generateCardNumber, DecodeAMAccessCode} from "amnet-shared";
import {useCallback, useEffect, useLayoutEffect, useState} from "react";
import {Button, Card, Divider, Text, useTheme} from "react-native-paper";
import {Alert, Platform, TextInput, TouchableOpacity, View} from "react-native";

import {AMCard} from "../../models/AMCard";
import RealmContext from "../../models/RealmContext";
import {useModalStyles} from "../../utils/ModalStyles";

const {useRealm} = RealmContext;

export default function CardAddModal({navigation, route}) {
    const realm = useRealm();
    const theme = useTheme();
    const modalStyles = useModalStyles();

    // state values
    const [cardName, setCardName] = useState('');
    const [cardNumber, setCardNumber] = useState('');

    const cardAddCallback = useCallback(async (cardId: string, cardName: string) => {
        try {
            // validate AM card numbers
            cardId.startsWith('5') && DecodeAMAccessCode(cardId);
        } catch {
            const shouldContinue = await new Promise<boolean>(done => {
                Alert.alert(
                    "Invalid Access Code",
                    "It looks like the access code isn't from an Amusement IC card. Please double-check the code, and if it's correct, note that some networks might still reject it.",
                    [
                        {
                            style: "destructive",
                            text: "Continue Anyway",
                            onPress: () => done(true)
                        },
                        {
                            style: "cancel",
                            text: "Cancel",
                            onPress: () => done(false)
                        }
                    ], {
                        cancelable: true,
                        onDismiss: () => done(false)
                    });
            })

            if (!shouldContinue) {
                return;
            }
        }

        const duplicateCard = realm.objects<AMCard>(AMCard.schema.name).find(x => x.code === cardId);

        if (duplicateCard) {
            realm.write(() => {
                duplicateCard.name = cardName;
            });
        } else {
            realm.write(() => {
                realm.create<AMCard>(AMCard.schema.name, AMCard.generate(cardId, cardName));
            });
        }

        if (Platform.OS === 'ios') {
            navigation.getParent()?.goBack();
        } else {
            navigation.goBack();
        }
    }, [realm]);

    useLayoutEffect(() => {
        const canSave = cardName.length && cardNumber.length === 20;
        const themeOptions = canSave ? modalStyles.headerText : {color: theme.colors.outline};

        navigation.setOptions({
            headerRight: () => <TouchableOpacity disabled={!canSave}
                                                 onPress={() => cardAddCallback(cardNumber, cardName)}>
                <Text variant="bodyMedium" style={{...themeOptions}}>Save</Text>
            </TouchableOpacity>
        })
    }, [navigation, modalStyles, cardName, cardNumber]);

    // check params for autoGenerate request
    useEffect(() => {
        if (route.params?.autoGenerate) {
            setCardNumber(generateCardNumber());
        }
    }, []);

    return (<>
        {Platform.OS == 'ios' && <StatusBar style="light"/>}
        <View style={modalStyles.rootLayout}>
            <Card mode="contained">
                <Card.Content>
                    <View style={modalStyles.formItemRow}>
                        <Text variant="bodyMedium" style={modalStyles.formItemName}>
                            Card Name
                        </Text>
                        <TextInput style={modalStyles.formItemInput}
                                   autoFocus
                                   numberOfLines={1}
                                   value={cardName}
                                   onChangeText={setCardName}
                                   placeholder="Primary Card"
                                   placeholderTextColor={theme.colors.outline}/>
                    </View>

                    <Divider style={{marginVertical: 15}}/>

                    <View style={modalStyles.formItemRow}>
                        <Text variant="bodyMedium" style={modalStyles.formItemName}>
                            Access Code
                        </Text>
                        <TextInput numberOfLines={1}
                                   keyboardType="numeric"
                                   placeholder="0000 0000 0000 0000 0000"
                                   placeholderTextColor={theme.colors.outline}
                                   value={cardNumber.match(/.{1,4}/g)?.join(" ")}
                                   onChangeText={val => setCardNumber(val?.replaceAll(/\D/g, '').substring(0, 20) ?? '')}
                                   style={{...modalStyles.formItemInput, color: theme.colors.onSurface}}/>
                    </View>
                </Card.Content>
            </Card>

            <Button mode="text" onPress={() => setCardNumber(generateCardNumber())}>Generate Access Code</Button>
        </View>
    </>)
}