accounts-frontend/packages/app/components/profile/multiFactorAuth/instructions/Instructions.tsx

import React from 'react';
import { FormattedMessage as Message } from 'react-intl';
import clsx from 'clsx';

import profileForm from '../../profileForm.scss';
import messages from '../instructions.intl';
import OsInstruction from './OsInstruction';
import OsTile from './OsTile';
import styles from './instructions.scss';
import androidLogo from './images/android.svg';
import appleLogo from './images/apple.svg';
import windowsLogo from './images/windows.svg';

interface State {
    activeOs: null | 'android' | 'ios' | 'windows';
}

export default class Instructions extends React.Component<{}, State> {
    state: State = {
        activeOs: null,
    };

    render() {
        const { activeOs } = this.state;

        return (
            <div className={profileForm.formBody}>
                <div className={profileForm.formRow}>
                    <p className={profileForm.description}>
                        <Message {...messages.mfaIntroduction} />
                    </p>
                </div>

                <div className={profileForm.formRow}>
                    <div
                        className={clsx(styles.instructionContainer, {
                            [styles.instructionActive]: !!activeOs,
                        })}
                    >
                        <div
                            className={clsx(styles.osList, {
                                [styles.androidActive]: activeOs === 'android',
                                [styles.appleActive]: activeOs === 'ios',
                                [styles.windowsActive]: activeOs === 'windows',
                            })}
                        >
                            <OsTile
                                className={styles.androidTile}
                                logo={androidLogo}
                                label="Google Play"
                                onClick={(event) => this.onChangeOs(event, 'android')}
                            />
                            <OsTile
                                className={styles.appleTile}
                                logo={appleLogo}
                                label="App Store"
                                onClick={(event) => this.onChangeOs(event, 'ios')}
                            />
                            <OsTile
                                className={styles.windowsTile}
                                logo={windowsLogo}
                                label="Windows Store"
                                onClick={(event) => this.onChangeOs(event, 'windows')}
                            />
                        </div>

                        <div className={styles.osInstructionContainer}>
                            {activeOs ? <OsInstruction os={activeOs} /> : null}
                        </div>
                    </div>
                </div>
            </div>
        );
    }

    onChangeOs(event: React.MouseEvent, osName: 'android' | 'ios' | 'windows') {
        event.preventDefault();

        this.setState({
            activeOs: this.state.activeOs === osName ? null : osName,
        });
    }
}