RocketChat/Rocket.Chat

import { Meteor } from 'meteor/meteor';

import { trim } from '../../../../lib/utils/stringUtils';
import { settings } from '../../../settings/server';

export const validateCustomFields = function (fields) {
    // Special Case:
    // If an admin didn't set any custom fields there's nothing to validate against so consider any customFields valid
    if (trim(settings.get('Accounts_CustomFields')) === '') {
        return;
    }

    let customFieldsMeta;
    try {
        customFieldsMeta = JSON.parse(settings.get('Accounts_CustomFields'));
    } catch (e) {
        throw new Meteor.Error('error-invalid-customfield-json', 'Invalid JSON for Custom Fields');
    }

    const customFields = {};

    Object.keys(customFieldsMeta).forEach((fieldName) => {
        const field = customFieldsMeta[fieldName];

        customFields[fieldName] = fields[fieldName];
        const fieldValue = trim(fields[fieldName]);

        if (field.required && fieldValue === '') {
            throw new Meteor.Error('error-user-registration-custom-field', `Field ${fieldName} is required`, { method: 'registerUser' });
        }

        if (field.type === 'select' && field.options.indexOf(fields[fieldName]) === -1) {
            throw new Meteor.Error('error-user-registration-custom-field', `Value for field ${fieldName} is invalid`, { method: 'registerUser' });
        }

        if (field.maxLength && fieldValue.length > field.maxLength) {
            throw new Meteor.Error('error-user-registration-custom-field', `Max length of field ${fieldName} ${field.maxLength}`, {
                method: 'registerUser',
            });
        }

        if (field.minLength && fieldValue.length > 0 && fieldValue.length < field.minLength) {
            throw new Meteor.Error('error-user-registration-custom-field', `Min length of field ${fieldName} ${field.minLength}`, {
                method: 'registerUser',
            });
        }
    });
};