<?php
namespace QWSpeedCache\Cache;

defined( 'ABSPATH' ) || exit;

/**
 * Always-purge URL list when any post is published or updated.
 */
class AlwaysPurge {

	public function __construct() {
		add_action( 'save_post', array( $this, 'on_save' ), 30, 2 );
		add_action( 'qwsc_cache_purged_all', array( $this, 'purge_list' ) );
	}

	/**
	 * @param int      $post_id Post ID.
	 * @param \WP_Post $post    Post.
	 */
	public function on_save( $post_id, $post ) {
		if ( wp_is_post_revision( $post_id ) || ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) ) {
			return;
		}
		if ( ! is_object( $post ) || 'publish' !== $post->post_status ) {
			return;
		}
		$this->purge_list();
	}

	public function purge_list() {
		$s = \QWSpeedCache\Plugin::instance()->get_all_settings();
		$lines = Exclusions::parse_lines( (string) ( $s['cache_always_purge_urls'] ?? '' ) );
		if ( ! $lines ) {
			return;
		}
		$urls = array();
		foreach ( $lines as $line ) {
			if ( 0 === strpos( $line, 'http' ) ) {
				$urls[] = $line;
			} else {
				$urls[] = home_url( '/' . ltrim( $line, '/' ) );
			}
		}
		if ( $urls ) {
			do_action( 'qwsc_cache_purged_urls', $urls );
		}
	}
}