ository The indexable repository.
	 *
	 * @required
	 */
	public function set_indexable_repository( Indexable_Repository $indexable_repository ) {
		$this->indexable_repository = $indexable_repository;
	}

	/**
	 * Creates an indexable by its ID and type.
	 *
	 * @param int            $object_id   The indexable object ID.
	 * @param string         $object_type The indexable object type.
	 * @param Indexable|bool $indexable   Optional. An existing indexable to overwrite.
	 *
	 * @return bool|Indexable Instance of indexable. False when unable to build.
	 */
	public function build_for_id_and_type( $object_id, $object_type, $indexable = false ) {
		$indexable        = $this->ensure_indexable( $indexable );
		$indexable_before = $this->indexable_repository
			->query()
			->create( $indexable->as_array() );

		try {
			switch ( $object_type ) {
				case 'post':
					$indexable = $this->post_builder->build( $object_id, $indexable );
					if ( $indexable === false ) {
						// Post was not built for a reason, for example if its post type is excluded.
						return $indexable;
					}

					$this->primary_term_builder->build( $object_id );

					$author = $this->indexable_repository->find_by_id_and_type( $indexable->author_id, 'user', false );
					if ( ! $author ) {
						$this->build_for_id_and_type( $indexable->author_id, 'user' );
					}

					break;
				case 'user':
					$indexable = $this->author_builder->build( $object_id, $indexable );
					break;
				case 'term':
					$indexable = $this->term_builder->build( $object_id, $indexable );
					break;
				default:
					return $indexable;
			}
		}
		catch ( Source_Exception $exception ) {
			$indexable = $this->indexable_repository->query()->create(
				[
					'object_id'   => $object_id,
					'object_type' => $object_type,
					'post_status' => 'unindexed',
				]
			);
		}

		$indexable = $this->save_indexable( $indexable, $indexable_before );

		if ( \in_array( $object_type, [ 'post', 'term' ], true ) && $indexable->post_status !== 'unindexed' ) {
			$this->hierarchy_builder->build( $indexable );
		}

		return $indexable;
	}

	/**
	 * Creates an indexable for the homepage.
	 *
	 * @param Indexable|bool $indexable Optional. An existing indexable to overwrite.
	 *
	 * @return Indexable The home page indexable.
	 */
	public function build_for_home_page( $indexable = false ) {
		$indexable_before = $this->ensure_indexable( $indexable );
		$indexable        = $this->home_page_builder->build( $indexable_before );

		return $this->save_indexable( $indexable, $indexable_before );
	}

	/**
	 * Creates an indexable for the date archive.
	 *
	 * @param Indexable|bool $indexable Optional. An existing indexable to overwrite.
	 *
	 * @return Indexable The date archive indexable.
	 */
	public function build_for_date_archive( $indexable = false ) {
		$indexable = $this->ensure_indexable( $indexable );
		$indexable = $this->date_archive_builder->build( $indexable );

		return $this->save_indexable( $indexable );
	}

	/**
	 * Creates an indexable for a post type archive.
	 *
	 * @param string         $post_type The post type.
	 * @param Indexable|bool $indexable Optional. An existing indexable to overwrite.
	 *
	 * @return Indexable The post type archive indexable.
	 */
	public function build_for_post_type_archive( $post_type, $indexable = false ) {
		$indexable_before = $this->ensure_indexable( $indexable );
		$indexable        = $this->post_type_archive_builder->build( $post_type, $indexable_before );

		return $this->save_indexable( $indexable, $indexable_before );
	}

	/**
	 * Creates an indexable for a system page.
	 *
	 * @param string         $object_sub_type The type of system page.
	 * @param Indexable|bool $indexable       Optional. An existing indexable to overwrite.
	 *
	 * @return Indexable The search result indexable.
	 */
	public function build_for_system_page( $object_sub_type, $indexable = false ) {
		$indexable_before = $this->ensure_indexable( $indexable );
		$indexable        = $this->system_page_builder->build( $object_sub_type, $indexable_before );

		return $this->save_indexable( $indexable, $indexable_before );
	}

	/**
	 * Ensures we have a valid indexable. Creates one if false is passed.
	 *
	 * @param Indexable|false $indexable The indexable.
	 *
	 * @return Indexable The indexable.
	 */
	private function ensure_indexable( $indexable ) {
		if ( ! $indexable ) {
			return $this->indexable_repository->query()->create();
		}

		return $indexable;
	}

	/**
	 * Saves and returns an indexable (on production environments only).
	 *
	 * @param Indexable      $indexable        The indexable.
	 * @param Indexable|null $indexable_before The indexable before possible changes.
	 *
	 * @return Indexable The indexable.
	 */
	private function save_indexable( $indexable, $indexable_before = null ) {
		$intend_to_save = $this->indexable_helper->should_index_indexables();

		/**
		 * Filter: 'wpseo_override_save_indexable' - Allow developers to enable / disable
		 * saving the indexable when the indexable is updated. Warning: overriding
		 * the intended action may cause problems when moving from a staging to a
		 * production environment because indexable permalinks may get set incorrectly.
		 *
		 * @param Indexable $indexable The indexable to be saved.
		 *
		 * @api bool $intend_to_save True if YoastSEO intends to save the indexable.
		 */
		$intend_to_save = \apply_filters( 'wpseo_should_save_indexable', $intend_to_save, $indexable );

		if ( ! $intend_to_save ) {
			return $indexable;
		}

		// Save the indexable before running the WordPress hook.
		$indexable->save();

		if ( $indexable_before ) {
			/**
			 * Action: 'wpseo_save_indexable' - Allow developers to perform an action
			 * when the indexable is updated.
			 *
			 * @param Indexable $indexable_before The indexable before saving.
			 *
			 * @api Indexable $indexable The saved indexable.
			 */
			\do_action( 'wpseo_save_indexable', $indexable, $indexable_before );
		}

		return $indexable;
	}
}