printmpdf.module

<?php

/**
 * @file
 * Prints PDF for a given html node view.
 */

define('printmpdf_PDF_DEFAULT_FILENAME', '[site:name] - [node:title] - [node:changed:custom:Y-m-d]');

/**
 * Implements hook_config_info().
 */
function printmpdf_config_info() {
  $prefixes['printmpdf.settings'] = array(
    'label' => t('Print mpdf settings'),
    'group' => t('Configuration'),
  );
  return $prefixes;
}

/**
 * Implements hook_permission().
 */
function printmpdf_permission() {
  return array(
    'generate Print using mPDF' => array(
      'title' => t('Generate Print using mPDF'),
      'description' => t('Permission for HTML to PDF conversion'),
    ),
    'administer mpdf settings' => array(
      'title' => t('Access Print using mPDF settings'),
      'description' => t('Permission for accessing mpdf settings'),
    ),
  );
}

/**
 * Implements hook_menu().
 */
function printmpdf_menu() {
  $items['admin/config/user-interface/mpdf'] = array(
    'title' => 'Print using mPDF settings',
    'description' => 'configuration of custom mPDF setting',
    'page callback' => 'backdrop_get_form',
    'access callback' => 'user_access',
    'access arguments' => array('administer mpdf settings'),
    'page arguments' => array('printmpdf_config'),
    'weight' => -1,
    'type' => MENU_NORMAL_ITEM,
    'file' => 'printmpdf.admin.inc',
  );

  $items['node/%node/pdf'] = array(
    'title' => 'Generate PDF',
    'page callback' => 'printmpdf_generate_pdf',
    'page arguments' => array(1),
    'access callback' => '_printmpdf_attributes_access',
    'access arguments' => array(1),
   // 'type' => MENU_LOCAL_TASK,
   // 'context' => MENU_CONTEXT_PAGE | MENU_CONTEXT_INLINE,
    'file' => 'printmpdf.pages.inc',
  );
  return $items;
}

/**
 * Check for generate PDF permission.
 *
 * @param string $node
 *   Node array for currnet node.
 *
 * @return bool
 *   TRUE if permision allow and FALSE if access denied.
 */
function _printmpdf_attributes_access($node) {
  if (user_access('generate Print using mPDF')) {
    if (config_get('printmpdf.settings','printmpdf_type_' . $node->type) == 1 ) {
      return TRUE;
    }
    else {
      return FALSE;
    }
  }
  return FALSE; // TRUE or you can user user_access() permissions as well
}

/**
 * Generate the PDF file using the mPDF library.
 *
 * @param string $html
 *   contents of the template already with the node data.
 * @param string $filename
 *   name of the PDF file to be generated.
 */
function _printmpdf_generator($html, $filename = NULL) {

  ini_set('Display_errors', 'On');
  error_reporting(E_ALL);

  // International Paper Sizes ( width x height).
  $paper_size = array(
    '4A0' => array('w' => 1682, 'h' => 2378),
    '2A0' => array('w' => 1189, 'h' => 1682),
    'A0' => array('w' => 841, 'h' => 1189),
    'A1' => array('w' => 594, 'h' => 841),
    'A2' => array('w' => 420, 'h' => 594),
    'A3' => array('w' => 297, 'h' => 420),
    'A4' => array('w' => 210, 'h' => 297),
    'A5' => array('w' => 148, 'h' => 210),
    'A6' => array('w' => 105, 'h' => 148),
    'A7' => array('w' => 74, 'h' => 105),
    'A8' => array('w' => 52, 'h' => 74),
    'A9' => array('w' => 37, 'h' => 52),
    'A10' => array('w' => 26, 'h' => 37),

    'B0' => array('w' => 1000, 'h' => 1414),
    'B1' => array('w' => 707, 'h' => 1000),
    'B2' => array('w' => 500, 'h' => 707),
    'B3' => array('w' => 353, 'h' => 500),
    'B4' => array('w' => 250, 'h' => 353),
    'B5' => array('w' => 176, 'h' => 250),
    'B6' => array('w' => 125, 'h' => 176),
    'B7' => array('w' => 88, 'h' => 125),
    'B8' => array('w' => 62, 'h' => 88),
    'B9' => array('w' => 44, 'h' => 62),
    'B10' => array('w' => 31, 'h' => 44),

    'C0' => array('w' => 917, 'h' => 1297),
    'C1' => array('w' => 648, 'h' => 917),
    'C2' => array('w' => 458, 'h' => 648),
    'C3' => array('w' => 324, 'h' => 458),
    'C4' => array('w' => 229, 'h' => 324),
    'C5' => array('w' => 162, 'h' => 229),
    'C6' => array('w' => 114, 'h' => 162),
    'C7' => array('w' => 81, 'h' => 114),
    'C8' => array('w' => 57, 'h' => 81),
    'C9' => array('w' => 40, 'h' => 57),
    'C10' => array('w' => 28, 'h' => 40),

    'RA0' => array('w' => 860, 'h' => 1220),
    'RA1' => array('w' => 610, 'h' => 860),
    'RA2' => array('w' => 430, 'h' => 610),
    'SRA0' => array('w' => 900, 'h' => 1280),
    'SRA1' => array('w' => 640, 'h' => 900),
    'SRA2' => array('w' => 450, 'h' => 640),

    'Letter' => array('w' => 215.9, 'h' => 279.4),
    'Legal' => array('w' => 215.9, 'h' => 355.6),
    'Ledger' => array('w' => 279.4, 'h' => 431.8),
  );

  $root_path = backdrop_get_path('module', 'printmpdf');
  $module_path = backdrop_get_path('module', 'printmpdf');
  global $theme_path;

  $page = config_get('printmpdf.settings','printmpdf_pdf_page_size');
  $font_size = config_get('printmpdf.settings','printmpdf_pdf_font_size');
  $font_style = config_get('printmpdf.settings','printmpdf_pdf_default_font');

  // DEFAULT PDF margin Values.
  $margin_top = config_get('printmpdf.settings','printmpdf_margin_top');
  $margin_right = config_get('printmpdf.settings','printmpdf_margin_right');
  $margin_bottom = config_get('printmpdf.settings','printmpdf_margin_bottom');
  $margin_left = config_get('printmpdf.settings','printmpdf_margin_left');
  $margin_header = config_get('printmpdf.settings','printmpdf_margin_header');
  $margin_footer = config_get('printmpdf.settings','printmpdf_margin_footer');

  // Creating Instance of mPDF Class Library.
/*
  $mpdf = new \Mpdf\Mpdf(
    array($paper_size[$page]['w'], $paper_size[$page]['h']),
    $font_size,
    $font_style,
    $margin_left,
    $margin_right,
    $margin_top,
    $margin_bottom,
    $margin_header,
    $margin_footer
  );
*/
  $mpdf = new \Mpdf\Mpdf(['tempDir' => backdrop_realpath('public://').'/tmp/']);


  // set document DPI
  $mpdf->dpi = (int) config_get('printmpdf.settings','printmpdf_dpi');

  // Set image DPI
  $mpdf->img_dpi = (int) config_get('printmpdf.settings','printmpdf_img_dpi');

  // Enabling header option if available.
  $header = config_get('printmpdf.settings','printmpdf_pdf_header');
  if (isset($header) && $header != NULL) {
    $header = token_replace($header);
    $mpdf->SetHTMLHeader($header);
  }

  // Enabling Footer option if available.
  $footer = config_get('printmpdf.settings','printmpdf_pdf_footer');
  if (isset($footer) && $footer != NULL) {
    $footer = token_replace($footer);
    $mpdf->SetHTMLFooter($footer);
  }

  // Setting Watermark Text to PDF.
  $watermark_option = config_get('printmpdf.settings','printmpdf_watermark_option');
  $watermark_opacity = config_get('printmpdf.settings','printmpdf_watermark_opacity');

  // For watermark Text.
  if ($watermark_option == 'text') {
    $text = config_get('printmpdf.settings','printmpdf_pdf_watermark_text');
    if (isset($text) && $text != NULL) {
      $mpdf->SetWatermarkText($text, $watermark_opacity);
      $mpdf->showWatermarkText = TRUE;
    }
  }
  // For watermark Image.
  else {
    $image_id = config_get('printmpdf.settings','printmpdf_watermark_image');
    if (isset($image_id) && $image_id != NULL) {
      // Load the file via file.fid.
      $file = file_load($image_id);
      if (is_object($file)) {
        $file->status = FILE_STATUS_PERMANENT;
        file_save($file);
        file_usage_add($file, 'printmpdf', 'image', $image_id);

        $image_path = file_create_url($file->uri);
        $mpdf->SetWatermarkImage($image_path, $watermark_opacity, '', 'P');
        $mpdf->showWatermarkImage = TRUE;
      }
    }
  }

  // Setting Title to PDF.
  $title = config_get('printmpdf.settings','printmpdf_pdf_set_title');
  if (isset($title) && $title != NULL) {
    $mpdf->SetTitle($title);
  }

  // Setting Author to PDF.
  $author = config_get('printmpdf.settings','printmpdf_pdf_set_author');
  if (isset($author) && $author != NULL) {
    $mpdf->SetAuthor($author);
  }

  // Setting Subject to PDF.
  $subject = config_get('printmpdf.settings','printmpdf_pdf_set_subject');
  if (isset($subject) && $subject != NULL) {
    $mpdf->SetSubject($subject);
  }

  // Setting creator to PDF.
  $creator = config_get('printmpdf.settings','printmpdf_pdf_set_creator');
  if (isset($creator) && $creator != NULL) {
    $mpdf->SetCreator($creator);
  }

  // Setting Password to PDF.
  $password = config_get('printmpdf.settings','printmpdf_pdf_password');
  if (isset($password) && $password != NULL) {
    // Print and Copy is allowed.
    $mpdf->SetProtection(array('print', 'copy'), $password, $password);
  }

  // Setting CSS stylesheet to PDF.
  $stylesheet = config_get('printmpdf.settings','printmpdf_pdf_css_file');
  $stylesheet_content = NULL;
  if (isset($stylesheet) && $stylesheet != NULL) {
    $css_file_module = file_scan_directory($module_path, '/.*\.css$/');
    $css_file_theme = file_scan_directory($theme_path, '/.*\.css$/');
    // Check module directory
    if (isset($css_file_module[$module_path . '/' . $stylesheet])) {
      $stylesheet_content = file_get_contents($module_path . '/' . $stylesheet);
      $mpdf->WriteHTML($stylesheet_content, 1);
    }
    // Check theme directory
    elseif (isset($css_file_theme[$theme_path . '/' . $stylesheet])) {
      $stylesheet_content = file_get_contents($theme_path . '/' . $stylesheet);
      $mpdf->WriteHTML($stylesheet_content, 1);
    }
    else {
      backdrop_set_message(t('CSS style Sheet mentioned in PDF setting was not found.'), 'warning');
      return TRUE;
    }
  }

  // Writing html content for pdf buffer.
  $mpdf->WriteHTML($html);

  // Generating PDF File.
  switch(config_get('printmpdf.settings','printmpdf_pdf_save_option')) {
    case 1:
      // Dialog box for Download as PDF.
      $mpdf->Output($filename . '.pdf', 'D');
      exit;
      break;
    case 2:
      $folder = printmpdf_get_folder();
      if (is_dir(backdrop_realpath($folder)) ) {
        if (!printmpdf_is_writable(backdrop_realpath($folder))) { die('not writtable');
          if (backdrop_rmdir($folder)) {
            backdrop_mkdir($folder);
            backdrop_chmod($folder, 0777);
          }
          else {
            backdrop_set_message(t("Please ensure that public folder is writable."));
            exit;
          }
        }
      } else {
        if (printmpdf_is_writable(backdrop_realpath(file_build_uri('public://')))) {
          backdrop_mkdir($folder);
          backdrop_chmod($folder, 0777);
        }
        else {
          backdrop_set_message(t("Please ensure that public folder is writable."));
          exit;
        }
      }
      // Save to server 'Public file system path'.
      $path = $folder . '/' . $filename . '.pdf';
      $mpdf->Output($path , 'F');
//      backdrop_goto($_SERVER['HTTP_REFERER']);
//      exit;
      break;
    case 0:
    default:
      // Open in same browser.
      $mpdf->Output($filename . '.pdf', 'I'); 
      exit;
      break;
  }
  
  return TRUE;
}

/**
 * API to generate a PDF file.
 *
 * @param string $html
 *   html is rendered HTML that will be converted into PDF.
 *
 * @param string $printmpdf_pdf_filename
 *   printmpdf_pdf_filename is Optional name of the PDF file.
 *
 * @return bool
 *   TRUE if PDF is successfully generated and FALSE if it isn't.
 */
function printmpdf_api($html, $printmpdf_pdf_filename = NULL) {
  if (printmpdf_library_exist() == TRUE) {              // always TRUE
    if ($printmpdf_pdf_filename === NULL) {
      $filename = explode(config_get('printmpdf.settings','printmpdf_pdf_filename'), '[site:name]');
      $printmpdf_pdf_filename = token_replace($filename[0]);
    }
    _printmpdf_generator($html, $printmpdf_pdf_filename);
  }
}

/**
 * Function to check existence of mPDF library.
 * changed, library now included in module distribution, so always return TRUE
 * @return bool
 *   TRUE if mPDF library path exists.
 */
function printmpdf_library_exist() {
  require_once BACKDROP_ROOT . '/' . backdrop_get_path('module', 'printmpdf') . '/vendor/autoload.php' ; 
  return TRUE;
}

/**
 * Implements hook_entity_info_alter().
 */
function printmpdf_entity_info_alter(&$info) {
  // Add the 'Print' view mode for nodes.
  $info['node']['view modes'] += array(
    'PDF' => array(
      'label' => t('PDF'),
      'custom settings' => FALSE,
    ),
  );
}

/**
 * Implements hook_preprocess_node().
 */
function printmpdf_preprocess_node(&$vars) {
  if ($vars['view_mode'] == 'PDF') {
    $vars['theme_hook_suggestions'][] = 'node__' . $vars['type'] . '__pdf';
  }
}

/**
 * Implements hook_node_view_alter().
 */
function printmpdf_node_view_alter(&$build) {
  if ($build['#view_mode'] == 'PDF') {
    // Remove contextual links
    unset($build['#contextual_links']);
  }
}

/*
 * Function to check if a folder/file is writable
 */
function printmpdf_is_writable($path) {
  if ($path[strlen($path)-1] == '/') {
    return backdrop_is_writable($path . uniqid(mt_rand()) . '.tmp');
  }
  elseif (is_dir($path)) {
    return printmpdf_is_writable($path . '/' . uniqid( mt_rand()) . '.tmp');
  }
  $rm = file_exists( $path );
  $f = @fopen( $path, 'a' );
  if ($f === FALSE)
    return FALSE;
  fclose( $f );
  if (!$rm)
    unlink( $path );
  return TRUE;
}

/*
 * Function to create printmpdf folder
 */
function printmpdf_create_folder(stdClass $pdfmpdf = NULL) {
  $folder = printmpdf_get_folder($pdfmpdf);
  $result = file_prepare_directory($folder, FILE_CREATE_DIRECTORY | FILE_MODIFY_PERMISSIONS);
  if ( !$result ) {
    watchdog('file system', 'The directory %folder does not exist or is not writable.', array('%folder' => $folder), WATCHDOG_ERROR);
  }
  backdrop_chmod($folder, 0777);
  return $result;
}

/**
 *  Get the folder for pdf files.
 */
function printmpdf_get_folder(stdClass $pdfmpdf = NULL) {
  $folder = &backdrop_static(__FUNCTION__);
  if ( !isset($folder) ) {
    $folder = config_get('printmpdf.settings','printmpdf');
  }
  if ( !empty($pdfmpdf->smid) ) {
    return file_build_uri($folder . '/' . $pdfmpdf->smid);
  }
  else {
    return file_build_uri($folder);
  }
}

/**
 * Implements MODULE_NAME_field_extra_fields().
 */
function printmpdf_field_extra_fields() {
  foreach (array('page','ichianalyse','rezept') as $node_type) {
  $extra['node'][$node_type]['display']['printmpdf_icon'] = array(
     'label' => t('printmpdf icon'),
     'description' => t('The printmpdf icon'),
     'weight' => 0,
   );
  }
  return $extra;
 
}
/**
 * Implements hook_node_view().
*/
function printmpdf_node_view($node, $view_mode, $langcode) {
  // Only Display if visiblity is set
  if (config_get('printmpdf.settings','printmpdf_type_' . $node->type) == 1 ) {
	$icon_path = $GLOBALS['base_url']. '/' . backdrop_get_path('module', 'printmpdf') . "/file-icon-pdf-50px.png";
	$node_pdf_url = $GLOBALS['base_url']. '/node/' . $node->nid . '/pdf';
     $node->content['printmpdf_icon'] = array(
       // '#markup' => '<a href="'. $node_pdf_url . '" target="_blank"><img src="' .$icon_path . '" ></a> Path=' . $icon_path . ' pdf path ' . $node_pdf_url ,
	     '#markup' => '<div class="printmpdfbutton"><a href="'. $node_pdf_url . '" target="_blank"><img src="' .$icon_path . '" ></a></div>',
       );
  }
}