function print_link_allowed in Printer, email and PDF versions 6

Same name and namespace in other branches

1. 5.4 print.module \print_link_allowed()
2. 5.3 print.module \print_link_allowed()
3. 7.2 print.module \print_link_allowed()
4. 7 print.module \print_link_allowed()
5. 5.x print.module \print_link_allowed()

Check if the link to the PF version is allowed depending on the settings

Parameters

$args: array containing the possible parameters: teaser, node, type, path

Return value

FALSE if not allowed PRINT_ALLOW_NORMAL_LINK if a normal link is allowed PRINT_ALLOW_BOOK_LINK if a link is allowed in a book node

2 calls to print_link_allowed()

print_insert_link in ./print.module

Auxiliary function to display a formatted Printer-friendly link

print_link in ./print.module

Implementation of hook_link().

File

./print.module, line 811

Displays Printer-friendly versions of Drupal pages.

Code

function print_link_allowed($args) {
  if (!empty($args['teaser']) && !variable_get('print_html_link_teaser', PRINT_HTML_LINK_TEASER_DEFAULT) || !user_access('access print')) {

    // If the teaser link is disabled or the user is not allowed
    return FALSE;
  }
  if (!empty($args['path'])) {
    $nid = preg_replace('!^node/!', '', drupal_get_normal_path($args['path']));
    if (ctype_digit($nid)) {
      $args['node'] = node_load($nid);
    }
  }
  if (!empty($args['node'])) {
    static $node_type = '';
    $node = $args['node'];
    if (isset($node->type)) {
      $node_type = $node->type;
    }

    // Node
    $print_html_node_link_visibility = variable_get('print_html_node_link_visibility', PRINT_HTML_NODE_LINK_VISIBILITY_DEFAULT);
    $print_html_node_link_pages = variable_get('print_html_node_link_pages', PRINT_HTML_NODE_LINK_PAGES_DEFAULT);
    if (!_print_page_match($print_html_node_link_visibility, "node/" . $node->nid, $print_html_node_link_pages)) {

      // Page not in visibility list
      return FALSE;
    }
    elseif (isset($args['type']) && $args['type'] == 'comment' && isset($node_type)) {

      // Link is for a comment, return the configured setting
      // Cache this statically to avoid duplicate queries for every comment.
      static $res = array();
      if (!isset($res[$node->nid])) {
        $res[$node->nid] = db_fetch_object(db_query("SELECT comments FROM {print_node_conf} WHERE nid = %d", $node->nid));
      }
      $print_display_comment = $res && $res[$node->nid] !== FALSE ? intval($res[$node->nid]->comments) : variable_get('print_display_comment_' . $node_type, PRINT_TYPE_COMMENT_LINK_DEFAULT);
      if ($print_display_comment) {
        return PRINT_ALLOW_NORMAL_LINK;
      }
    }
    else {

      // Node link
      if (isset($node->print_display) && !$node->print_display) {

        // Link for this node is disabled
        return FALSE;
      }
      elseif (isset($node->book)) {

        // Node is a book;
        $print_html_book_link = variable_get('print_html_book_link', PRINT_HTML_BOOK_LINK_DEFAULT);
        switch ($print_html_book_link) {
          case 1:
            if (user_access('access printer-friendly version')) {
              return PRINT_ALLOW_BOOK_LINK;
            }
            break;
          case 2:
            return PRINT_ALLOW_NORMAL_LINK;
        }
      }
      else {
        return PRINT_ALLOW_NORMAL_LINK;
      }
    }
  }
  else {

    // 'System' page
    $print_html_sys_link_visibility = variable_get('print_html_sys_link_visibility', PRINT_HTML_SYS_LINK_VISIBILITY_DEFAULT);
    $print_html_sys_link_pages = variable_get('print_html_sys_link_pages', PRINT_HTML_SYS_LINK_PAGES_DEFAULT);
    return _print_page_match($print_html_sys_link_visibility, $_GET['q'], $print_html_sys_link_pages);
  }
  return FALSE;
}