64 lines
1.8 KiB
PHP
64 lines
1.8 KiB
PHP
<?php
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if (!defined('ABSPATH')) exit;
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class ActionScheduler_OptionLock extends ActionScheduler_Lock {
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public function set( $lock_type ) {
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global $wpdb;
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$lock_key = $this->get_key( $lock_type );
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$existing_lock_value = $this->get_existing_lock( $lock_type );
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$new_lock_value = $this->new_lock_value( $lock_type );
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// The lock may not exist yet, or may have been deleted.
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if ( empty( $existing_lock_value ) ) {
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return (bool) $wpdb->insert(
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$wpdb->options,
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array(
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'option_name' => $lock_key,
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'option_value' => $new_lock_value,
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'autoload' => 'no',
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)
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);
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}
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if ( $this->get_expiration_from( $existing_lock_value ) >= time() ) {
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return false;
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}
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// Otherwise, try to obtain the lock.
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return (bool) $wpdb->update(
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$wpdb->options,
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array( 'option_value' => $new_lock_value ),
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array(
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'option_name' => $lock_key,
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'option_value' => $existing_lock_value,
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)
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);
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}
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public function get_expiration( $lock_type ) {
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return $this->get_expiration_from( $this->get_existing_lock( $lock_type ) );
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}
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private function get_expiration_from( $lock_value ) {
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$lock_string = explode( '|', $lock_value );
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// Old style lock?
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if ( count( $lock_string ) === 1 && is_numeric( $lock_string[0] ) ) {
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return (int) $lock_string[0];
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}
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// New style lock?
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if ( count( $lock_string ) === 2 && is_numeric( $lock_string[1] ) ) {
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return (int) $lock_string[1];
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}
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return false;
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}
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protected function get_key( $lock_type ) {
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return sprintf( 'action_scheduler_lock_%s', $lock_type );
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}
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private function get_existing_lock( $lock_type ) {
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global $wpdb;
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// Now grab the existing lock value, if there is one.
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return (string) $wpdb->get_var(
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$wpdb->prepare(
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"SELECT option_value FROM $wpdb->options WHERE option_name = %s",
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$this->get_key( $lock_type )
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)
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);
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}
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private function new_lock_value( $lock_type ) {
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return uniqid( '', true ) . '|' . ( time() + $this->get_duration( $lock_type ) );
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}
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}
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