interface EntityLastInstalledSchemaRepositoryInterface

interface EntityLastInstalledSchemaRepositoryInterface {
    
    /**
     * Gets the entity type definition in its most recently installed state.
     *
     * During the application lifetime, entity type definitions can change. For
     * example, updated code can be deployed. The getDefinition() method will
     * always return the definition as determined by the current codebase. This
     * method, however, returns what the definition was when the last time that
     * one of the \Drupal\Core\Entity\EntityTypeListenerInterface events was last
     * fired and completed successfully. In other words, the definition that
     * the entity type's handlers have incorporated into the application state.
     * For example, if the entity type's storage handler is SQL-based, the
     * definition for which database tables were created.
     *
     * Application management code can check if getDefinition() differs from
     * getLastInstalledDefinition() and decide whether to:
     * - Invoke the appropriate \Drupal\Core\Entity\EntityTypeListenerInterface
     *   event so that handlers react to the new definition.
     * - Raise a warning that the application state is incompatible with the
     *   codebase.
     * - Perform some other action.
     *
     * @param string $entity_type_id
     *   The entity type ID.
     *
     * @return \Drupal\Core\Entity\EntityTypeInterface|null
     *   The installed entity type definition, or NULL if the entity type has
     *   not yet been installed via onEntityTypeCreate().
     *
     * @see \Drupal\Core\Entity\EntityTypeListenerInterface
     */
    public function getLastInstalledDefinition($entity_type_id);
    
    /**
     * Gets the entity type definitions in their most recently installed state.
     *
     * During the application lifetime, entity type definitions can change. For
     * example, updated code can be deployed. The
     * \Drupal\Core\Entity\EntityTypeManagerInterface::getDefinitions() method
     * will always return the definitions as determined by the current codebase.
     * This method returns the definitions from the last time that a
     * \Drupal\Core\Entity\EntityTypeListener event was completed. In other words,
     * the definitions that the entity type's handlers have incorporated into the
     * application state. For example, if the entity type's storage handler is
     * SQL-based, the definition for which database tables were created.
     *
     * Application management code can check if
     * \Drupal\Core\Entity\EntityTypeManagerInterface::getDefinitions() differs
     * from getLastInstalledDefinitions() and decide whether to:
     * - Invoke the appropriate \Drupal\Core\Entity\EntityTypeListenerInterface
     *   event so that handlers react to the new definitions.
     * - Raise a warning that the application state is incompatible with the
     *   codebase.
     * - Perform some other action.
     *
     * @return \Drupal\Core\Entity\EntityTypeInterface[]
     *   An array containing the installed definition for all entity types, keyed
     *   by the entity type ID.
     */
    public function getLastInstalledDefinitions();
    
    /**
     * Stores the entity type definition in the application state.
     *
     * @param \Drupal\Core\Entity\EntityTypeInterface $entity_type
     *   The entity type definition.
     *
     * @return $this
     */
    public function setLastInstalledDefinition(EntityTypeInterface $entity_type);
    
    /**
     * Deletes the entity type definition from the application state.
     *
     * @param string $entity_type_id
     *   The entity type definition identifier.
     *
     * @return $this
     */
    public function deleteLastInstalledDefinition($entity_type_id);
    
    /**
     * Gets the entity type's most recently installed field storage definitions.
     *
     * During the application lifetime, field storage definitions can change. For
     * example, updated code can be deployed. The getFieldStorageDefinitions()
     * method will always return the definitions as determined by the current
     * codebase. This method, however, returns what the definitions were when the
     * last time that one of the
     * \Drupal\Core\Field\FieldStorageDefinitionListenerInterface events was last
     * fired and completed successfully. In other words, the definitions that
     * the entity type's handlers have incorporated into the application state.
     * For example, if the entity type's storage handler is SQL-based, the
     * definitions for which database tables were created.
     *
     * Application management code can check if getFieldStorageDefinitions()
     * differs from getLastInstalledFieldStorageDefinitions() and decide whether
     * to:
     * - Invoke the appropriate
     *   \Drupal\Core\Field\FieldStorageDefinitionListenerInterface
     *   events so that handlers react to the new definitions.
     * - Raise a warning that the application state is incompatible with the
     *   codebase.
     * - Perform some other action.
     *
     * @param string $entity_type_id
     *   The entity type ID.
     *
     * @return \Drupal\Core\Field\FieldStorageDefinitionInterface[]
     *   The array of installed field storage definitions for the entity type,
     *   keyed by field name.
     *
     * @see \Drupal\Core\Entity\EntityTypeListenerInterface
     */
    public function getLastInstalledFieldStorageDefinitions($entity_type_id);
    
    /**
     * Stores the entity type's field storage definitions in the application state.
     *
     * @param string $entity_type_id
     *   The entity type identifier.
     * @param \Drupal\Core\Field\FieldStorageDefinitionInterface[] $storage_definitions
     *   An array of field storage definitions.
     */
    public function setLastInstalledFieldStorageDefinitions($entity_type_id, array $storage_definitions);
    
    /**
     * Stores the field storage definition in the application state.
     *
     * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
     *   The field storage definition.
     */
    public function setLastInstalledFieldStorageDefinition(FieldStorageDefinitionInterface $storage_definition);
    
    /**
     * Deletes the field storage definition from the application state.
     *
     * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
     *   The field storage definition.
     */
    public function deleteLastInstalledFieldStorageDefinition(FieldStorageDefinitionInterface $storage_definition);

}