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<?php
class Red_Flusher {
const DELETE_HOOK = 'redirection_log_delete';
const DELETE_FREQ = 'daily';
const DELETE_MAX = 20000;
const DELETE_KEEP_ON = 10; // 10 minutes
public function flush() {
$options = red_get_options();
$total = $this->expire_logs( 'redirection_logs', $options['expire_redirect'] );
$total += $this->expire_logs( 'redirection_404', $options['expire_404'] );
if ( $total >= self::DELETE_MAX ) {
$next = time() + ( self::DELETE_KEEP_ON * 60 );
// There are still more logs to clear - keep on doing until we're clean or until the next normal event
if ( $next < wp_next_scheduled( self::DELETE_HOOK ) ) {
wp_schedule_single_event( $next, self::DELETE_HOOK );
}
}
$this->optimize_logs();
}
private function optimize_logs() {
global $wpdb;
$rand = wp_rand( 1, 5000 );
if ( $rand === 11 ) {
$wpdb->query( "OPTIMIZE TABLE {$wpdb->prefix}redirection_logs" );
} elseif ( $rand === 12 ) {
$wpdb->query( "OPTIMIZE TABLE {$wpdb->prefix}redirection_404" );
}
}
private function expire_logs( $table, $expiry_time ) {
global $wpdb;
if ( $expiry_time > 0 ) {
// Known values
// phpcs:ignore
$logs = $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM {$wpdb->prefix}{$table} WHERE created < DATE_SUB(NOW(), INTERVAL %d DAY)", $expiry_time ) );
if ( $logs > 0 ) {
// Known values
// phpcs:ignore
$wpdb->query( $wpdb->prepare( "DELETE FROM {$wpdb->prefix}{$table} WHERE created < DATE_SUB(NOW(), INTERVAL %d DAY) LIMIT %d", $expiry_time, self::DELETE_MAX ) );
return min( self::DELETE_MAX, $logs );
}
}
return 0;
}
public static function schedule() {
$options = red_get_options();
if ( $options['expire_redirect'] > 0 || $options['expire_404'] > 0 ) {
if ( ! wp_next_scheduled( self::DELETE_HOOK ) ) {
wp_schedule_event( time(), self::DELETE_FREQ, self::DELETE_HOOK );
}
} else {
self::clear();
}
}
public static function clear() {
wp_clear_scheduled_hook( self::DELETE_HOOK );
}
}