Club Drupal

/**

 * Implements hook_requirements().

 */

function print_epub_requirements($phase) {

  $requirements = array();

  $t = get_t();

  switch ($phase) {

    // At runtime, make sure that a EPUB generation tool is selected.

    case 'runtime':

      $print_epub_epub_tool = variable_get('print_epub_epub_tool', PRINT_EPUB_EPUB_TOOL_DEFAULT);

      if (empty($print_epub_epub_tool)) {

        $requirements['print_epub_tool'] = array(

          'title' => $t('Printer, email and EPUB versions - EPUB generation library'),

          'value' => $t('No EPUB tool selected'),

          'description' => $t('Please configure it in the !url.', array('!url' => l($t('EPUB settings page'), 'admin/config/user-interface/print/epub'))),

          'severity' => REQUIREMENT_ERROR,

        );

      }

      else {

        $tool = explode('|', $print_epub_epub_tool);

        if (!is_file($tool[1]) || !is_readable($tool[1])) {

          $requirements['print_epub_tool'] = array(

            'title' => $t('Printer, email and EPUB versions - EPUB generation library'),

            'value' => $t('File not found'),

            'description' => $t('The currently selected EPUB generation library (%file) is no longer accessible.', array('%file' => $tool[1])),

            'severity' => REQUIREMENT_ERROR,

          );

        }

      }

      break;

  }

  return $requirements;

}