<?php

/**

 * Zend Framework

 *

 * LICENSE

 *

 * This source file is subject to the new BSD license that is bundled

 * with this package in the file LICENSE.txt.

 * It is also available through the world-wide-web at this URL:

 * http://framework.zend.com/license/new-bsd

 * If you did not receive a copy of the license and are unable to

 * obtain it through the world-wide-web, please send an email

 * to license@zend.com so we can send you a copy immediately.

 *

 * @category   Zend

 * @package    Zend_View

 * @subpackage Helper

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

/**

 * Abstract class for extension

 */

require_once 'Zend/View/Helper/FormElement.php';

/**

 * Helper to generate a set of radio button elements

 *

 * @category   Zend

 * @package    Zend_View

 * @subpackage Helper

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

class Zend_View_Helper_FormRadio extends Zend_View_Helper_FormElement

{

    /**

     * Input type to use

     * @var string

     */

    protected $_inputType = 'radio';

    /**

     * Whether or not this element represents an array collection by default

     * @var bool

     */

    protected $_isArray = false;

    /**

     * Generates a set of radio button elements.

     *

     * @access public

     *

     * @param string|array $name If a string, the element name.  If an

     * array, all other parameters are ignored, and the array elements

     * are extracted in place of added parameters.

     *

     * @param mixed $value The radio value to mark as 'checked'.

     *

     * @param array $options An array of key-value pairs where the array

     * key is the radio value, and the array value is the radio text.

     *

     * @param array|string $attribs Attributes added to each radio.

     *

     * @return string The radio buttons XHTML.

     */

    public function formRadio($name, $value = null, $attribs = null,

        $options = null, $listsep = "<br />\n")

    {

        $info = $this->_getInfo($name, $value, $attribs, $options, $listsep);

        extract($info); // name, value, attribs, options, listsep, disable

        // retrieve attributes for labels (prefixed with 'label_' or 'label')

        $label_attribs = array();

        foreach ($attribs as $key => $val) {

            $tmp    = false;

            $keyLen = strlen($key);

            if ((6 < $keyLen) && (substr($key, 0, 6) == 'label_')) {

                $tmp = substr($key, 6);

            } elseif ((5 < $keyLen) && (substr($key, 0, 5) == 'label')) {

                $tmp = substr($key, 5);

            }

            if ($tmp) {

                // make sure first char is lowercase

                $tmp[0] = strtolower($tmp[0]);

                $label_attribs[$tmp] = $val;

                unset($attribs[$key]);

            }

        }

        $labelPlacement = 'append';

        foreach ($label_attribs as $key => $val) {

            switch (strtolower($key)) {

                case 'placement':

                    unset($label_attribs[$key]);

                    $val = strtolower($val);

                    if (in_array($val, array('prepend', 'append'))) {

                        $labelPlacement = $val;

                    }

                    break;

            }

        }

        // the radio button values and labels

        $options = (array) $options;

        // build the element

        $xhtml = '';

        $list  = array();

        // should the name affect an array collection?

        $name = $this->view->escape($name);

        if ($this->_isArray && ('[]' != substr($name, -2))) {

            $name .= '[]';

        }

        // ensure value is an array to allow matching multiple times

        $value = (array) $value;

        // Set up the filter - Alnum + hyphen + underscore

        require_once 'Zend/Filter/PregReplace.php';

        $pattern = @preg_match('/\pL/u', 'a') 

            ? '/[^\p{L}\p{N}\-\_]/u'    // Unicode

            : '/[^a-zA-Z0-9\-\_]/';     // No Unicode

        $filter = new Zend_Filter_PregReplace($pattern, "");

        // add radio buttons to the list.

        foreach ($options as $opt_value => $opt_label) {

            // Should the label be escaped?

            if ($escape) {

                $opt_label = $this->view->escape($opt_label);

            }

            // is it disabled?

            $disabled = '';

            if (true === $disable) {

                $disabled = ' disabled="disabled"';

            } elseif (is_array($disable) && in_array($opt_value, $disable)) {

                $disabled = ' disabled="disabled"';

            }

            // is it checked?

            $checked = '';

            if (in_array($opt_value, $value)) {

                $checked = ' checked="checked"';

            }

            // generate ID

            $optId = $id . '-' . $filter->filter($opt_value);

            // Wrap the radios in labels

            $radio = '<label'

                    . $this->_htmlAttribs($label_attribs) . '>'

                    . (('prepend' == $labelPlacement) ? $opt_label : '')

                    . '<input type="' . $this->_inputType . '"'

                    . ' name="' . $name . '"'

                    . ' id="' . $optId . '"'

                    . ' value="' . $this->view->escape($opt_value) . '"'

                    . $checked

                    . $disabled

                    . $this->_htmlAttribs($attribs)

                    . $this->getClosingBracket()

                    . (('append' == $labelPlacement) ? $opt_label : '')

                    . '</label>';

            // add to the array of radio buttons

            $list[] = $radio;

        }

        // XHTML or HTML for standard list separator?

        if (!$this->_isXhtml() && false !== strpos($listsep, '<br />')) {

            $listsep = str_replace('<br />', '<br>', $listsep);

        }

        // done!

        $xhtml .= implode($listsep, $list);

        return $xhtml;

    }

}