form_question_rule_type_select_limit.inc

<?php
require_once dirname(__FILE__).'/../../form_question_rule/form_question_rule.inc';

class Form_Question_Rule_Type_Select_Limit extends Form_Question_Rule
{


    function __construct($assetid=0)
    {
        parent::__construct($assetid);

    }//end constructor


    public static function getOperators()
    {
        $operators = Array(
                        '=='    => 'Must select exactly this many options...',
                        '!='    => 'Must not select this many options...',
                        '>'     => 'Must select more than this many options...',
                        '<'     => 'Must select less than this many options...',
                        '>='    => 'Must select at least this many options...',
                        '<='    => 'Must select no more than this many options...',
                     );

        return $operators;

    }//end getOperators()


    function generateJSCode(&$q_asset, $rule_data)
    {
        $operator = array_get_index($rule_data, 'operator', '==');
        $value = array_get_index($rule_data, 'value', '');

        $q_name = 'q'.$q_asset->id;

        if ($q_asset instanceof Form_Question_Type_Select) {
            // selection list or derivative - check multiple attribute
            $q_id = $q_name.($q_asset->attr('multiple') ? '[]' : '');
        } else if ($q_asset instanceof Form_Question_Type_Option_List) {
            // option list - always single (*sniff* :`-( )
            $q_id = $q_name;
        } else {
            // tickbox list - always multiple
            $q_id = $q_name.'[]';
        }

        $q_safe_name = str_replace(':', '_', $q_name);

        // since this is going to be a generic rule type applicable to both select lists and tickbox
        // lists, we need different types of magic for each possible question type.

        // For a selection list (and descendants) we need something like this.......
        ob_start();

            ?>
            var selectCount = 0;

            <?php
            if ($q_asset instanceof Form_Question_Type_Select) {
                ?>var select = form.elements["<?php echo $q_id ?>"];
                for(i=0; i<select.options.length; i++) {
                    if (select.options[i].selected) selectCount++;
                }<?php
            } else {            // tickbox (or option) list needs something else
                foreach ($q_asset->getOptions() as $key => $option) {
                    ?>if (document.getElementById("<?php echo $q_safe_name.'_'.$key ?>").checked) selectCount++;
                    <?php
                }
            }

            ?>
            if (!(selectCount <?php echo $operator ?> <?php echo $value ?>)) {
                submission_errors[submission_errors.length] = "<?php
                    if (!strlen($q_asset->attr('cust_required_error'))) {
                        ?>You have selected "+selectCount+" option"+(selectCount == 1 ? "" : "s")+" at question \"<?php echo addslashes($q_asset->attr('name')) ?>\" - <?php
                        switch ($operator) {
                            case '==':
                                echo ' you must select '.$value;
                            break;

                            case '!=':
                                echo ' you must not select this many';
                            break;

                            case '>':
                                echo ' you must select more than '.$value;
                            break;

                            case '>=':
                                echo ' you must select at least '.$value;
                            break;

                            case '<':
                                echo ' you must select less than '.$value;
                            break;

                            case '<=':
                                echo ' you must select no more than '.$value;
                            break;

                        }//end switch
                    } else {
                        echo addslashes($q_asset->attr('cust_required_error'));
                    }
                ?>";
            }
            <?php
        $contents = ob_get_contents();
        ob_end_clean();

        return $contents;

    }//end generateJSCode()


    function evaluate($answer, $rule_data)
    {
        $operator = array_get_index($rule_data, 'operator', '==');
        $value = array_get_index($rule_data, 'value', '');

        $valid = eval('return \''.count($answer).'\''.$operator.'\''.$value.'\';');
        return $valid;

    }//end evaluate()


    function defaultError(&$q_asset, $rule_data)
    {
        $operator = array_get_index($rule_data, 'operator', '==');
        $value = array_get_index($rule_data, 'value', '');
        if ($operator == '>=' && $value == 1 && strlen($q_asset->attr('cust_required_error'))) {
            $error_str = $q_asset->attr('cust_required_error');
        } else {
            $selected_options = count($q_asset->getValue());
            $error_str = translate('core_form_rule_select_limit_error_'.$operator, $selected_options, $q_asset->attr('name'), $value);
        }
        return $error_str;

    }//end defaultError()


    function ruleDescription(&$q_asset, $rule_data)
    {
        $operator = array_get_index($rule_data, 'operator', '==');
        $value = array_get_index($rule_data, 'value', '');

        $error_str = translate('core_form_rule_select_limit_desc_'.$operator, $value, $q_asset->attr('name'));

        return $error_str;

    }//end ruleDescription()


}//end class
?>