function farm_movement_preprocess_field in farmOS 7

Implements hook_preprocess_field().

File

modules/farm/farm_movement/farm_movement.module, line 335

Farm movement.

Code

function farm_movement_preprocess_field(&$vars) {

  // If this is the "Movement to" field, add "from" information.
  if (!empty($vars['element']['#field_name']) && $vars['element']['#field_name'] == 'field_farm_move_to') {

    // Get the log entity from the field collection.
    $log = $vars['element']['#object']
      ->hostEntity();

    // If a log entity isn't available, bail.
    if (empty($log)) {
      return;
    }

    // Get the log entity and metadata wrapper.
    $log_wrapper = entity_metadata_wrapper('log', $log);

    // Load all the assets referenced by this log.
    $assets = $log_wrapper->field_farm_asset
      ->value();

    // If there are no assets, bail.
    if (empty($assets)) {
      return;
    }

    // Subtract one from the log's timestamp, so we can find the most recent
    // movement BEFORE this one.
    $previous_timestamp = $log->timestamp - 1;

    // Include done and not done movements.
    $done = NULL;

    // Look up the previous location(s) of the asset(s) and build a list of
    // unique area links.
    $from_areas = array();
    foreach ($assets as $asset) {
      $areas = farm_movement_asset_location($asset, $previous_timestamp, $done);
      foreach ($areas as $area) {
        if (empty($from_areas[$area->tid])) {
          $from_areas[$area->tid] = l($area->name, 'taxonomy/term/' . $area->tid);
        }
      }
    }

    // If no areas were found, bail.
    if (empty($from_areas)) {
      return;
    }

    // Append links to the field.
    $from_areas = implode(', ', $from_areas);
    $vars['items'][0]['#suffix'] = ' (' . t('from !areas', array(
      '!areas' => $from_areas,
    )) . ')';
  }
}