<?php

class Qs_Form_Filter extends Qs_Form
{
    protected $_ajaxValidation = false;
    protected $_filterFields = array();
    protected $_filterQueryDescriptionFormat = 'Search will be done by %fields%.';
    protected $_descriptionPlaceholder = '%fields%';

    protected function _initElements()
    {
        $this->addElement(
            'text',
            'query',
            array('label' => 'Search', 'size' => 50, 'filters' => array(new Zend_Filter_StringTrim()))
        );
        $this->_setQueryDescription();

        return $this;
    }

    public function setOptions(array $options)
    {
        if (isset($options['filterFields'])) {
            $this->_filterFields = $options['filterFields'];
            unset($options['filterFields']);
        }
        if (isset($options['filterQueryDescriptionFormat'])) {
            $this->_filterQueryDescriptionFormat  = $options['filterQueryDescriptionFormat'];
            unset($options['filterQueryDescriptionFormat']);
        }
        if (isset($options['descriptionPlaceholder'])) {
            $this->_descriptionPlaceholder = $options['descriptionPlaceholder'];
            unset($options['descriptionPlaceholder']);
        }
        return parent::setOptions($options);
    }

    protected function _setQueryDescription()
    {
        if (!empty($this->_filterFields)) {
            $description = $this->_filterQueryDescriptionFormat;
            if (false !== strpos($description, $this->_descriptionPlaceholder)) {
                $fields = '"' . Qs_Array::implodeLast('", "', '" or "', $this->_filterFields) . '"';
                $description = str_replace($this->_descriptionPlaceholder, $fields, $this->_filterQueryDescriptionFormat);
            }
            $this->getElement('query')->setDescription($description);
        }

        return $this;
    }

    protected function _initButtons()
    {
        if (!$this->_hasButtons) {
            return $this;
        }
        $this->addElement(
            'submit',
            'btnSearch',
            array(
                'label'   => 'Search',
                'ignore'  => true,
                'attribs' => array('class' => 'btn'),
            )
        );

        $this->addElement(
            'submit',
            'btnCancel',
            array(
                'label'      => 'Reset',
                'ignore'     => true,
                'attribs'    => array(
                    'class'   => 'btn',
                    'onclick' => "document.location='" . constant('BASE_URL') . '/' . constant('CURRENT_PAGE') . "';",
                    'helper'  => 'formInputButton',
                )
            )
        );

        $this->addDisplayGroup(array('btnSearch', 'btnCancel'), 'submitGroup');

        return $this;
    }
}