IsEmailAddressInternal

function toBoolean(value) {
    if (typeof (value) === 'string') {
        if (['yes', 'true'].indexOf(value.toLowerCase()) != -1) {
            return true;
        } else if (['no', 'false'].indexOf(value.toLowerCase()) != -1) {
            return false;
        }
        throw 'Argument does not contain a valid boolean-like value';
    }
    return value ? true : false;
}


function escapeRegex(string) {
    return string.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
}


function main() {
    const emails = argToList(args.email);
    const domains = argToList(args.domain).map(x => x.toLowerCase());
    const includeSubdomains = toBoolean(args.include_subdomains);

    let results = [];
    for (let i = 0; i < emails.length; i++) {
        const parts = emails[i].split('@', 2);

        let networkType = 'Unknown';
        let inDomain = 'no';

        if (parts.length > 1) {
            const domain = parts[1].toLowerCase();
            if (domains.indexOf(domain) !== -1 || (includeSubdomains && new RegExp(`^(.*\\.)?(${domains.map(d => escapeRegex(d)).join('|')})`).test(domain))) {
                inDomain = 'yes';
                networkType = 'Internal';
            } else {
                networkType = 'External';
            }

            const emailDict = {
                'Address': emails[i],
                'Domain': domain,
                'Username': parts[0],
                'NetworkType': networkType
            };

            const emailObj = {
                'Account.Email(val.Address && val.Address == obj.Address)': emailDict
            };

            results.push({
                'Type': entryTypes['note'],
                'ContentsFormat': formats['json'],
                'Contents': inDomain,
                'HumanReadable': inDomain,
                'EntryContext': emailObj
            });
        } else {
            results.push({
                Type: entryTypes.error,
                ContentsFormat: formats.text,
                Contents: `Email address "${emails[i]}" is not valid`
            });
        }
    }
    return results;
}


try {
    return main();
} catch (error) {
    throw 'Error occurred while running the script:\n' + error;
}