email-regex-programmatic.jsx

/* @jsx regex.node */

import { regex, Regex, RegexGroup as Group, RegexText as Text, RegexWord as Word } from 'jsx-pragmatic';

const Dot = () => {
    return <Text>.</Text>;
};

const At = () => {
    return <Text>@</Text>;
};

const emailRegex = ({ providers, tlds, optionalLastName = true }) => {
    return (
        <Regex>
            <Word />
            <Group optional={ optionalLastName }>
                <Dot />
                <Word />
            </Group>
            
            <At />
            <Group union name='provider'>
                { providers.map(provider => <Text>{ provider }</Text>) }
            </Group>
            
            <Dot />
            <Group union name='tld'>
                { tlds.map(tld => <Text>{ tld }</Text>) }
            </Group>
        </Regex>
    );
};

const email = '[email protected]';

const match = email.match(emailRegex({
    optionalLastName: false,
    providers:        [ 'paypal', 'google', '$mail' ],
    tlds:             [ 'com', 'org', 'net' ]
}));