comindware.core.ui/src/form/validators/lengthValidator.ts

Comindware Core UI provides the basic components like editors, lists, dropdowns, popups that we so desperately need while creating Marionette-based single-page applications.

import LocalizationService from '../../services/LocalizationService';
import _ from 'underscore';

export default function(options) {
    options = _.extend(
        {
            type: 'length',
            message: LocalizationService.get('CORE.FORM.VALIDATION.LENGTH')
        },
        options
    );

    return function length(value) {
        const val = _.isObject(value) ? value.value : value;
        options.value = val;
        const err = {
            type: options.type,
            message: typeof options.message === 'function' ? options.message(options) : options.message
        };
        //Don't check empty values (add a 'required' validator for this)
        if (val === null || val === undefined || val === '') return;

        if (options.min) {
            if (val.length < options.min) {
                return err;
            }
        }
        if (options.max) {
            if (val.length > options.max) {
                return err;
            }
        }
    };
}