<?php

/**
 * @file
 * Generate a PDF for the print_pdf module using the mPDF library.
 *
 * @ingroup print
 */

/**
 * Implements hook_pdf_tool_info().
 */
function print_pdf_mpdf_pdf_tool_info() {
  $info = array(
    'name' => 'mPDF',
    'url' => 'https://github.com/mpdf/mpdf/releases/latest',
    'expand_css' => FALSE,
    'public_dirs' => array(
      'ttfontdata',
      'tmp',
    ),
  );

  $pdf_tool = explode('|', variable_get('print_pdf_pdf_tool', PRINT_PDF_PDF_TOOL_DEFAULT));
  if (!isset($pdf_tool[1]) || print_pdf_mpdf_pdf_tool_version($pdf_tool[1]) !== '>= 7.x') {
    $info['tool_dirs'] = array(
      'graph_cache',
    );
  }
  return $info;
}

/**
 * Implements hook_pdf_tool_version().
 */
function print_pdf_mpdf_pdf_tool_version($pdf_tool) {
  if (file_exists(DRUPAL_ROOT . '/' . $pdf_tool)) {
    include_once DRUPAL_ROOT . '/' . $pdf_tool;
  }

  if (defined('mPDF_VERSION')) {
    return mPDF_VERSION;
  }
  else {
    // Version 7 of the mpdf library uses a composer autoloader.
    // Also there no longer is a way to truly detect the library version, so
    // this seems like the best alternative.
    $mpdf_version_7_plus = strpos($pdf_tool, 'autoload.php') !== FALSE;
    if ($mpdf_version_7_plus) {
      return '>= 7.x';
    }
    else {
      return 'unknown';
    }
  }
}

/**
 * Implements hook_print_pdf_available_libs_alter().
 */
function print_pdf_mpdf_print_pdf_available_libs_alter(&$pdf_tools) {
  module_load_include('inc', 'print', 'includes/print');
  $tools = _print_scan_libs('mpdf', '!^mpdf.php$!');

  foreach ($tools as $tool) {
    $pdf_tools['print_pdf_mpdf|' . $tool] = 'mPDF (' . dirname($tool) . ')';
  }

  // mPDF >= 7.0 uses a composer autoloader.
  $tools = _print_scan_libs('mpdf', '!^autoload.php$!');
  foreach ($tools as $tool) {
    if (preg_match('!mpdf.*?/vendor/autoload.php$!', $tool)) {
      $pdf_tools['print_pdf_mpdf|' . $tool] = 'mPDF (' . dirname(dirname($tool)) . ')';
    }
  }
}