( array_filter( $preparedUrls ) );
	}

	/**
	 * Stores the image data for a given post in our DB table.
	 *
	 * @since 4.0.5
	 *
	 * @param  int   $postId The post ID.
	 * @param  array $images The images.
	 * @return void
	 */
	private function updatePost( $postId, $images = [] ) {
		$post                    = \AIOSEO\Plugin\Common\Models\Post::getPost( $postId );
		$meta                    = $post->exists() ? [] : aioseo()->migration->meta->getMigratedPostMeta( $postId );
		$meta['post_id']         = $postId;
		$meta['images']          = ! empty( $images ) ? $images : null;
		$meta['image_scan_date'] = gmdate( 'Y-m-d H:i:s' );

		$post->set( $meta );
		$post->save();
	}

	/**
	 * Returns the image extension regex pattern.
	 *
	 * @since 4.2.2
	 *
	 * @return string
	 */
	public function getImageExtensionRegexPattern() {
		static $pattern;
		if ( null !== $pattern ) {
			return $pattern;
		}

		$pattern = '/http.*\.(' . implode( '|', $this->supportedExtensions ) . ')$/i';

		return $pattern;
	}
}