function og_context_determine_context in Organic groups 7

Same name and namespace in other branches

1. 7.2 og_context/og_context.module \og_context_determine_context()

Determine the best matching context of a viewed page.

Parameters

$item: Optional; A menu item that context should be extracted from. If empty defaults to the current menu item by using menu_get_item().

1 call to og_context_determine_context()

og_context in og_context/og_context.module

Get or set group context using the menu system.

File

og_context/og_context.module, line 430

Get a group from a viewed page.

Code

function og_context_determine_context($item = NULL) {
  $context = FALSE;

  // Enable url and node context handlers by default.
  $defaults = array(
    'url' => -5,
    'node' => -4,
  );
  if ($enabled_providers = array_keys(variable_get("og_context_negotiation_group_context", $defaults))) {
    if (empty($item)) {
      $item = menu_get_item();
    }
    foreach (og_context_negotiation_info() as $name => $provider) {
      if (in_array($name, $enabled_providers)) {
        $invoke = FALSE;
        if (!empty($provider['menu path'])) {
          foreach ($provider['menu path'] as $path) {
            if (strpos($item['path'], $path) === 0) {
              $invoke = TRUE;

              // Path matches, so we can break.
              break;
            }
          }
        }
        else {

          // Context isn't determined by the menu item.
          $invoke = TRUE;
        }
        $gids = array();
        if ($invoke && ($gids = call_user_func($provider['callback']))) {

          // Check if one of the group IDs already exists in the session, and if
          // so use it.
          if (!empty($_SESSION['og_context']) && in_array($_SESSION['og_context'], $gids)) {
            $gid = $_SESSION['og_context'];
          }
          else {

            // Grab the first group ID.
            $gid = reset($gids);
          }
          $context = og_load($gid);

          // We found the first context, so we can break.
          break;
        }
      }
    }
  }
  return $context;
}