crocodoc.module

<?php

/**
 * @file
 * A field formatter for the File field, which renders the file as
 * an embedded document, using Crocodoc file viewer.
 * At the current time this viewer will reasonably display files of these
 * types: Adobe .pdf, Microsoft .doc/.docx, .xls/.xlsx. and .ppt/.pptx.
 *
 * The field may be resized and/or otherwise modified using the css selector
 * ".crocodoc"
 */

/**
 * Implements hook_help(). 
 *
 * Describe the purpose and usage  of this module.
 */
function crocodoc_help($path, $arg) {
  $helptext = '';
  if ($path == 'admin/help#crocodoc') {
    $helptext = '<p>';
    $helptext .= t('This module provides a new format for the File field type.' .
    ' This format presents the file as a fully rendered object within a web page -' .
    ' i.e. it displays the contents of the file as appropriate to its filetype' .
    ' (Adobe Acrobat .pdf, Microsoft Word .doc/.docx, Micrososft Excel .xls/.xlsx, Microsoft Powerpoint .ppt/.pptx),' .
    ' using the Crocodoc embedded rendering engine.</p>' . 
    '<p>N.B.: Only files that are public may use this formatter -' . 
	' Crocodoc must be able to access the file in order to ' .
	' render and display it. In other words, it won\'t work on' . 
	' a typical development laptop, or if your server is behind' .
	' a firewall where Crocodoc is unable to access it.');
    $helptext .= '</p>';
    $helptext .= '<p>';
    $helptext .= t('To use this field format, add a File field to a new or existing content type (such as Basic Page) on the content type\'s Manage Fields form.' .
    ' The File field type provides only one widget type - File - so select that. On the content type\'s "Manage Display" form,' .
    ' there will be a drop-down select list of available display formats for the File field. To display the file within the embedded' .
    ' crocodoc viewer, choose the \'Crocodoc Embedded Document Viewer\' format.');
    $helptext .= '</p>';
    $helptext .= '<p>';
    $helptext .= t('The document viewer may be styled using the CSS selector \'.crocodoc\'. By default, the viewer\'s width is 100% and its height is 400px, with a 1px black border.');
    $helptext .= '</p>';
  }
  return $helptext;
}

/**
 * Implements hook_field_formatter_info_alter().
 *
 * Add a new formatter to the
 * list of formatters available for the File field type.
 */
function crocodoc_field_formatter_info_alter(&$info) {
  $new_formatter = array(
    'label' => t('Embedded Crocodoc viewer'),
    'field types' => array(0 => 'file'),
    'settings' => array(),
    'module' => 'crocodoc',
  );
  $info['crocodoc_embedded_doc'] = $new_formatter;
}

/**
 * Implements hook_field_formatter_view().
 *
 * Renders the ouput of an
 * 'Embedded crocodoc viewer' formatted field within an iframe that
 * pulls in the crocodocs viewer to display the file inline.
 *
 */
function crocodoc_field_formatter_view($entity_type, $entity, $field, $instance, $langcode, $items, $display) {
  $element = array();
  switch ($display['type']) {
    // This formatter outputs the field within an iframe.
    case 'crocodoc_embedded_doc':
      foreach ($items as $delta => $item) {
        $item_uri = $item['uri'];
        if (file_uri_scheme($item_uri) == 'public') {
          $url = file_create_url($item_uri);
          $encoded_url = urlencode($url);
          $encoded_url = "http://web.crocodoc.com/files/test-document.doc";
          try {
            include_once ('crocodoc.php');
            $croco = new Crocodoc();
            $ret = $croco->upload($encoded_url);
            $ret_inter = json_decode($ret, true);
            if(array_key_exists('error', $ret_inter)) {
              throw new Exception("Error occured while uploading. Error : ". $ret_inter["error"]);
            }
            $uuid = $ret_inter["uuid"];
            $status = json_decode($croco->getStatus($uuid), true);
            if(array_key_exists('error', $status)) {
              throw new Exception("Error occured while retrieving status. Error : ". $status["error"]);
            }
            $viewable = $status[0]["viewable"];
            $count = 0;
            while((($viewable != true) && ($count<10)) ) {
                $status = json_decode($croco->getStatus($uuid), true);
                $viewable = $status[0]["viewable"];
                $statusStr = $status[0]["status"];
                if ($statusStr == "ERROR") {
                  throw new Exception("Error occured in document conversion");
                }
                sleep(2);
                $count = $count+2;
            }
            $session = $croco->createSession($uuid);
            $sessionStr = json_decode($session, true);
            $url = $sessionStr["session"];
            drupal_add_css(drupal_get_path('module', 'crocodoc') . '/crocodoc.css');
            $element[$delta]['#markup'] = '<iframe class="crocodoc" src="https://crocodoc.com/view/' . $url . '"></iframe>';
          }
          catch (Exception $e) {
            drupal_set_message(t($e->getMessage()), $type = 'error');
          }  
        }
        else {
          drupal_set_message(t('The file (%file) is not publicly accessable. It must be publicly available in order for the crocodocs viewer to be able to access it.', array('%file' => $item['filename'])), 'error', FALSE);
        }
      }
      break;
  }
  return $element;
}