Automattic / jetpack

	 *   @type string $last_modified The most recent timestamp to appear on the sitemap.

	 * }

	 */

	public function build_one_image_sitemap( $number, $from_id ) {

		$last_post_id = $from_id;

		$any_posts_left = true;

		if ( $this->logger ) {

			$debug_name = jp_sitemap_filename( JP_IMAGE_SITEMAP_TYPE, $number );

			$this->logger->report( "-- Building $debug_name" );

		}

		$buffer = new Jetpack_Sitemap_Buffer_Image(

			JP_SITEMAP_MAX_ITEMS,

			JP_SITEMAP_MAX_BYTES

		);

		// Add as many items to the buffer as possible.

		while ( false === $buffer->is_full() ) {

			$posts = $this->librarian->query_images_after_id(

				$last_post_id, JP_SITEMAP_BATCH_SIZE

			);

			if ( null == $posts ) { // WPCS: loose comparison ok.

				$any_posts_left = false;

				break;

			}

			foreach ( $posts as $post ) {

				$current_item = $this->image_post_to_sitemap_item( $post );

				if ( true === $buffer->append( $current_item['xml'] ) ) {

					$last_post_id = $post->ID;

					$buffer->view_time( $current_item['last_modified'] );

				} else {

					break;

				}

			}

		}

		// If no items were added, return false.

		if ( true === $buffer->is_empty() ) {

			return false;

		}

		// Store the buffer as the content of a jp_sitemap post.

		$this->librarian->store_sitemap_data(

			$number,

			JP_IMAGE_SITEMAP_TYPE,

			$buffer->contents(),

			$buffer->last_modified()

		);

		/*

		 * Now report back with the ID of the last post to be

		 * successfully added and whether there are any posts left.

		 */

		return array(

			'last_id'       => $last_post_id,

			'any_left'      => $any_posts_left,

			'last_modified' => $buffer->last_modified(),

		);

	}

	/**

	 * Build and store a single video sitemap. Returns false if no sitemap is built.

	 *   @type string $last_modified The most recent timestamp to appear on the sitemap.

	 * }

	 */

	public function build_one_video_sitemap( $number, $from_id ) {

		$last_post_id = $from_id;

		$any_posts_left = true;

		if ( $this->logger ) {

			$debug_name = jp_sitemap_filename( JP_VIDEO_SITEMAP_TYPE, $number );

			$this->logger->report( "-- Building $debug_name" );

		}

		$buffer = new Jetpack_Sitemap_Buffer_Video(

			JP_SITEMAP_MAX_ITEMS,

			JP_SITEMAP_MAX_BYTES

		);

		// Add as many items to the buffer as possible.

		while ( false === $buffer->is_full() ) {

			$posts = $this->librarian->query_videos_after_id(

				$last_post_id, JP_SITEMAP_BATCH_SIZE

			);

			if ( null == $posts ) { // WPCS: loose comparison ok.

				$any_posts_left = false;

				break;

			}

			foreach ( $posts as $post ) {

				$current_item = $this->video_post_to_sitemap_item( $post );

				if ( true === $buffer->append( $current_item['xml'] ) ) {

					$last_post_id = $post->ID;

					$buffer->view_time( $current_item['last_modified'] );

				} else {

					break;

				}

			}

		}

		// If no items were added, return false.

		if ( true === $buffer->is_empty() ) {

			return false;

		}

		if ( false === $buffer->is_empty() ) {

			$this->librarian->store_sitemap_data(

				$number,

				JP_VIDEO_SITEMAP_TYPE,

				$buffer->contents(),

				$buffer->last_modified()

			);

		}

		/*

		 * Now report back with the ID of the last post to be

		 * successfully added and whether there are any posts left.

		 */

		return array(

			'last_id'       => $last_post_id,

			'any_left'      => $any_posts_left,

			'last_modified' => $buffer->last_modified(),

		);

	}

	/**

	 * Build and store a single page sitemap index. Return false if no index is built.