dsathyakumar/a11y-auditor

'use strict';

/***************************************************************************************
 * Add to the list of Audit Rules
 * Rule : "Associate labels explicitly with their controls"
 * @return Rule Info object with Rule ID, Info, ErrMsg, Tags, Handler
 **/

var $ = require('jquery');
var _ = require('lodash/core');
var enums = require('../enums/enums');

function _ruleExector(elem) {
    var _severityEnum = enums.severityEnum,
        _id = $(elem).attr('id'),
        _labelObj;

    //if there is a proper placeholder attribute and text
    if (elem.hasAttribute('id') && !_.isEmpty(_id)) {
        _labelObj = $('label[for=' + _id + ']');

        //if label text is non-empty and there is only one label element defined
        if (_labelObj.length === 1 && !_.isEmpty(_labelObj.html())) {
            return {
                TYPE: _severityEnum.INFO,
                RESULT: true,
                MSG: 'PASSED!'
            };
        } else { //if there is no label element or more than one defined
            return {
                TYPE: _severityEnum.ERROR,
                RESULT: false,
                MSG: 'Failed! No Label or more than one label element defined for element of id =' + _id
            };
        }
    } else {
        return {
            TYPE: _severityEnum.ERROR,
            RESULT: false,
            MSG: 'Failed! No ID attribute is defined & therefore cannot be associated explicitly with label controlds'
        };
    }
}

module.exports = {
    name: 'hasLabels',
    description: 'Associate labels explicitly with their controls',
    ruleID: 'AX_19',
    tagName: [
        'INPUT',
        'SELECT',
        'TEXTAREA',
        'DATALIST',
        'METER',
        'KEYGEN',
        'OUTPUT'
    ],
    handler: _ruleExector,
    compliance: 'AA',
    isGlobal: false
};