function farm_plan_entity_delete in farmOS 7

Implements hook_entity_delete().

File

modules/farm/farm_plan/farm_plan.module, line 1019

Farm plan - A farm plan entity type.

Code

function farm_plan_entity_delete($entity, $type) {

  // Get the entity ID, and skip if it couldn't be found.
  $entity_id = entity_id($type, $entity);
  if (empty($entity_id)) {
    return;
  }

  // If the entity ID is not numeric, bail.
  if (!is_numeric($entity_id)) {
    return;
  }

  // Get available relationships between plans and other record types.
  $relationships = farm_plan_record_relationships();

  // Make a list of relationships indexed by entity type.
  $entity_types = array();
  foreach ($relationships as $relationship => $info) {
    if (!empty($info['entity_type'])) {
      $entity_types[$info['entity_type']][] = $relationship;
    }
  }

  // If a related entity type is being deleted, delete any references to that
  // entity in the relationship table.
  // In theory, this shouldn't happen because farm_constraint prevents entities
  // from being deleted that are linked to plans. But, it could still happen via
  // an uninformed call to entity_delete(), so we have this logic here to
  // handle cleanup regardless.
  if (array_key_exists($type, $entity_types)) {
    foreach ($entity_types[$type] as $relationship) {

      // Get information about the relationship.
      $info = $relationships[$relationship];

      // If it doesn't have a table, or a field, skip it.
      if (empty($info['table']) || empty($info['field'])) {
        continue;
      }

      // Delete all references to this plan in the table.
      db_query('DELETE FROM {' . $info['table'] . '} WHERE ' . $info['field'] . ' = :entity_id', array(
        ':entity_id' => $entity_id,
      ));
    }
  }
  elseif ($type == 'farm_plan') {
    foreach ($relationships as $relationship => $info) {

      // If it doesn't have a table, skip it.
      if (empty($info['table'])) {
        continue;
      }

      // Delete all references to this plan in the table.
      db_query('DELETE FROM {' . $info['table'] . '} WHERE plan_id = :plan_id', array(
        ':plan_id' => $entity_id,
      ));
    }
  }
}