interface/modules/zend_modules/library/Zend/Form/View/Helper/File/FormFileUploadProgress.php

   1 <?php
   2 /**
   3  * Zend Framework (http://framework.zend.com/)
   4  *
   5  * @link      http://github.com/zendframework/zf2 for the canonical source repository
   6  * @copyright Copyright (c) 2005-2013 Zend Technologies USA Inc. (http://www.zend.com)
   7  * @license   http://framework.zend.com/license/new-bsd New BSD License
   8  */
   9
  10 namespace Zend\Form\View\Helper\File;
  11
  12 use Zend\Form\ElementInterface;
  13 use Zend\Form\View\Helper\FormInput;
  14
  15 /**
  16  * A view helper to render the hidden input with a UploadProgress id
  17  * for file uploads progress tracking.
  18  */
  19 class FormFileUploadProgress extends FormInput
  20 {
  21     /**
  22      * Invoke helper as functor
  23      *
  24      * Proxies to {@link render()}.
  25      *
  26      * @param  ElementInterface|null $element
  27      * @return string
  28      */
  29     public function __invoke(ElementInterface $element = null)
  30     {
  31         return $this->renderHiddenId();
  32     }
  33
  34     /**
  35      * Render a hidden form <input> element with the progress id
  36      *
  37      * @return string
  38      */
  39     public function renderHiddenId()
  40     {
  41         $attributes          = array();
  42         $attributes['id']    = 'progress_key';
  43         $attributes['name']  = $this->getName();
  44         $attributes['type']  = 'hidden';
  45         $attributes['value'] = $this->getValue();
  46
  47         return sprintf(
  48             '<input %s%s',
  49             $this->createAttributesString($attributes),
  50             $this->getInlineClosingBracket()
  51         );
  52     }
  53
  54     /**
  55      * @return string
  56      */
  57     protected function getName()
  58     {
  59         return 'UPLOAD_IDENTIFIER';
  60     }
  61
  62     /**
  63      * @return string
  64      */
  65     protected function getValue()
  66     {
  67         return uniqid();
  68     }
  69 }