table_exists() ) {
$this->unschedule();
update_option( 'ewww_image_optimizer_relative_migration_status', 'done' );
delete_option( 'ewww_image_optimizer_relative_migration_offset' );
}
if ( ! get_option( 'ewww_image_optimizer_relative_migration_status' ) ) {
update_option( 'ewww_image_optimizer_relative_migration_status', 'started' );
}
$this->maybe_schedule();
}
/**
* Check to see if the ewwwio_images table actually exists.
*
* @return bool True if does, false if it don't.
*/
private function table_exists() {
global $wpdb;
return $wpdb->get_var( "SHOW TABLES LIKE '$wpdb->ewwwio_images'" ) === $wpdb->ewwwio_images;
}
/**
* Retrieves a batch of records based on the current offset.
*/
private function get_records() {
ewwwio_debug_message( '' . __METHOD__ . '()' );
global $wpdb;
if ( strpos( $wpdb->charset, 'utf8' ) === false ) {
ewww_image_optimizer_db_init();
global $ewwwdb;
} else {
$ewwwdb = $wpdb;
}
$query = "SELECT id,path,updated FROM $ewwwdb->ewwwio_images WHERE pending=0 AND image_size > 0 ORDER BY id DESC LIMIT $this->offset,500";
$records = $ewwwdb->get_results( $query, ARRAY_A );
$this->offset += 500;
if ( is_array( $records ) ) {
return $records;
}
return array();
}
/**
* Called via wp_cron to initiate the migration effort.
*/
public function migrate() {
ewwwio_debug_message( '' . __METHOD__ . '()' );
$this->started = time();
$this->offset = (int) get_option( 'ewww_image_optimizer_relative_migration_offset' );
$records = $this->get_records();
ewwwio_debug_message( 'starting at ' . gmdate( 'Y-m-d H:i:s', $this->started ) . " with offset $this->offset" );
while ( ! empty( $records ) ) {
foreach ( $records as $record ) {
if ( $this->already_migrated( $record['path'] ) ) {
ewwwio_debug_message( 'already migrated' );
continue;
}
// Relativize the path, and store it back in the db.
$relative_path = ewww_image_optimizer_relativize_path( $record['path'] );
if ( $record['path'] !== $relative_path ) {
$record['path'] = $relative_path;
$this->update_relative_record( $record );
}
}
if ( time() - $this->started > 20 ) {
update_option( 'ewww_image_optimizer_relative_migration_offset', $this->offset, false );
return;
}
$records = $this->get_records();
}
$this->unschedule();
update_option( 'ewww_image_optimizer_relative_migration_status', 'done' );
delete_option( 'ewww_image_optimizer_relative_migration_offset' );
}
/**
* Checks to see if the record already has been migrated.
*
* @param string $path Path of file as retrieved from database.
*/
private function already_migrated( $path ) {
if ( strpos( $path, 'EWWW_IMAGE_OPTIMIZER_RELATIVE_FOLDER' ) === 0 ) {
return true;
}
if ( strpos( $path, 'ABSPATH' ) === 0 ) {
return true;
}
if ( strpos( $path, 'WP_CONTENT_DIR' ) === 0 ) {
return true;
}
return false;
}
/**
* Updates the db record with the relativized path.
*
* @param array $record Includes a relative path, the ID, and the updated timestamp.
*/
private function update_relative_record( $record ) {
ewwwio_debug_message( '' . __METHOD__ . '()' );
global $wpdb;
if ( strpos( $wpdb->charset, 'utf8' ) === false ) {
ewww_image_optimizer_db_init();
global $ewwwdb;
} else {
$ewwwdb = $wpdb;
}
$ewwwdb->update(
$ewwwdb->ewwwio_images,
array(
'path' => $record['path'],
'updated' => $record['updated'],
),
array(
'id' => $record['id'],
)
);
}
/**
* Schedule the migration.
*/
private function maybe_schedule() {
ewwwio_debug_message( '' . __METHOD__ . '()' );
// Create 5 minute wp_cron schedule.
add_filter( 'cron_schedules', array( $this, 'add_migration_schedule' ) );
add_action( 'ewww_image_optimizer_relative_migration', array( $this, 'migrate' ) );
// Schedule migration function.
if ( ! wp_next_scheduled( 'ewww_image_optimizer_relative_migration' ) ) {
ewwwio_debug_message( 'scheduling migration' );
wp_schedule_event( time(), 'ewwwio_relative_migration_interval', 'ewww_image_optimizer_relative_migration' );
}
}
/**
* Clean up the scheduled event.
*/
private function unschedule() {
ewwwio_debug_message( '' . __METHOD__ . '()' );
$timestamp = wp_next_scheduled( 'ewww_image_optimizer_relative_migration' );
if ( $timestamp ) {
wp_unschedule_event( $timestamp, 'ewww_image_optimizer_relative_migration' );
}
}
/**
* Adds a custom cron schedule: every 5 minutes.
*
* @param array $schedules An array of custom cron schedules.
*/
public function add_migration_schedule( $schedules ) {
ewwwio_debug_message( '' . __METHOD__ . '()' );
$schedules['ewwwio_relative_migration_interval'] = array(
'interval' => MINUTE_IN_SECONDS * 5,
'display' => 'Every 5 Minutes until complete',
);
return $schedules;
}
}
new EWWWIO_Relative_Migration();