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<?php
/**
 * @package     Joomla.Platform
 * @subpackage  Form
 *
 * @copyright   Copyright (C) 2005 - 2016 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE
 */

defined('JPATH_PLATFORM') or die;

/**
 * Form Field class for the Joomla Platform.
 * Provides an input field for files
 *
 * @link   http://www.w3.org/TR/html-markup/input.file.html#input.file
 * @since  11.1
 */
class JFormFieldFile extends JFormField
{
	/**
	 * The form field type.
	 *
	 * @var    string
	 * @since  11.1
	 */
	protected $type = 'File';

	/**
	 * The accepted file type list.
	 *
	 * @var    mixed
	 * @since  3.2
	 */
	protected $accept;

	/**
	 * Method to get certain otherwise inaccessible properties from the form field object.
	 *
	 * @param   string  $name  The property name for which to the the value.
	 *
	 * @return  mixed  The property value or null.
	 *
	 * @since   3.2
	 */
	public function __get($name)
	{
		switch ($name)
		{
			case 'accept':
				return $this->accept;
		}

		return parent::__get($name);
	}

	/**
	 * Method to set certain otherwise inaccessible properties of the form field object.
	 *
	 * @param   string  $name   The property name for which to the the value.
	 * @param   mixed   $value  The value of the property.
	 *
	 * @return  void
	 *
	 * @since   3.2
	 */
	public function __set($name, $value)
	{
		switch ($name)
		{
			case 'accept':
				$this->accept = (string) $value;
				break;

			default:
				parent::__set($name, $value);
		}
	}

	/**
	 * Method to attach a JForm object to the field.
	 *
	 * @param   SimpleXMLElement  $element  The SimpleXMLElement object representing the `<field>` tag for the form field object.
	 * @param   mixed             $value    The form field value to validate.
	 * @param   string            $group    The field name group control value. This acts as as an array container for the field.
	 *                                      For example if the field has name="foo" and the group value is set to "bar" then the
	 *                                      full field name would end up being "bar[foo]".
	 *
	 * @return  boolean  True on success.
	 *
	 * @see     JFormField::setup()
	 * @since   3.2
	 */
	public function setup(SimpleXMLElement $element, $value, $group = null)
	{
		$return = parent::setup($element, $value, $group);

		if ($return)
		{
			$this->accept = (string) $this->element['accept'];
		}

		return $return;
	}

	/**
	 * Method to get the field input markup for the file field.
	 * Field attributes allow specification of a maximum file size and a string
	 * of accepted file extensions.
	 *
	 * @return  string  The field input markup.
	 *
	 * @note    The field does not include an upload mechanism.
	 * @see     JFormFieldMedia
	 * @since   11.1
	 */
	protected function getInput()
	{
		// Initialize some field attributes.
		$accept    = !empty($this->accept) ? ' accept="' . $this->accept . '"' : '';
		$size      = !empty($this->size) ? ' size="' . $this->size . '"' : '';
		$class     = !empty($this->class) ? ' class="' . $this->class . '"' : '';
		$disabled  = $this->disabled ? ' disabled' : '';
		$required  = $this->required ? ' required aria-required="true"' : '';
		$autofocus = $this->autofocus ? ' autofocus' : '';
		$multiple  = $this->multiple ? ' multiple' : '';

		// Initialize JavaScript field attributes.
		$onchange = $this->onchange ? ' onchange="' . $this->onchange . '"' : '';

		// Including fallback code for HTML5 non supported browsers.
		JHtml::_('jquery.framework');
		JHtml::_('script', 'system/html5fallback.js', false, true);

		return '<input type="file" name="' . $this->name . '" id="' . $this->id . '"' . $accept
			. $disabled . $class . $size . $onchange . $required . $autofocus . $multiple . ' />';
	}
}