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<?php

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namespace WPForms\Migrations;

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use ReflectionClass;

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use WPForms\Helpers\DB;

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use WPForms\Helpers\Transient;

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/**

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* Class Migrations handles both Lite and Pro plugin upgrade routines.

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* @since 1.7.5

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abstract class Base {

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/**

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* WP option name to store the migration versions.

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* Must have 'versions' in the name defined in extending classes,

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* like 'wpforms_versions', 'wpforms_versions_lite, 'wpforms_stripe_versions' etc.

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* @since 1.7.5

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const MIGRATED_OPTION_NAME = '';

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/**

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* Current plugin version.

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* @since 1.7.5

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const CURRENT_VERSION = WPFORMS_VERSION;

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/**

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* WP option name to store the upgraded from version number.

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* @since 1.8.8

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const UPGRADED_FROM_OPTION_NAME = 'wpforms_version_upgraded_from';

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/**

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* WP option name to store the previous plugin version.

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* @since 1.8.8

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const PREVIOUS_CORE_VERSION_OPTION_NAME = 'wpforms_version_previous';

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/**

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* Name of the core plugin used in log messages.

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* @since 1.7.5

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const PLUGIN_NAME = '';

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/**

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* Upgrade classes.

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* @since 1.7.5

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const UPGRADE_CLASSES = [];

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/**

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* Custom table handler classes.

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* @since 1.7.6

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const CUSTOM_TABLE_HANDLER_CLASSES = [];

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/**

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* Migration started status.

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* @since 1.7.5

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const STARTED = - 1;

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/**

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* Migration failed status.

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* @since 1.7.5

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const FAILED = - 2;

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/**

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* Initial fake version for comparisons.

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* @since 1.7.5

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const INITIAL_FAKE_VERSION = '0.0.1';

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/**

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* Reflection class instance.

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* @since 1.7.5

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* @var ReflectionClass

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protected $reflector;

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/**

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* Migrated versions.

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* @since 1.7.5

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* @var string[]

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protected $migrated = [];

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/**

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* Whether tables' check was done.

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* @since 1.8.7

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* @var bool

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private $tables_check_done;

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/**

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* Primary class constructor.

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* @since 1.7.5

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public function __construct() {

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$this->reflector = new ReflectionClass( $this );

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}

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/**

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* Class init.

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* @since 1.7.5

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public function init() {

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if ( ! $this->is_allowed() ) {

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return;

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}

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$this->maybe_convert_migration_option();

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$this->hooks();

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}

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/**

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* General hooks.

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* @since 1.7.5

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protected function hooks() {

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$priority = $this->is_core_plugin() ? - 9999 : 100;

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add_action( 'wpforms_loaded', [ $this, 'migrate' ], $priority );

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add_action( 'wpforms_loaded', [ $this, 'update_versions' ], $priority + 1 );

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}

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/**

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* Run the migrations of the core plugin for a specific version.

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* @since 1.7.5

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* @noinspection NotOptimalIfConditionsInspection

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public function migrate() { // phpcs:ignore Generic.Metrics.CyclomaticComplexity.TooHigh

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$classes = $this->get_upgrade_classes();

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$namespace = $this->reflector->getNamespaceName() . '\\';

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foreach ( $classes as $class ) {

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$upgrade_version = $this->get_upgrade_version( $class );

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$plugin_name = $this->get_plugin_name( $class );

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$class = $namespace . $class;

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if (

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( isset( $this->migrated[ $upgrade_version ] ) && $this->migrated[ $upgrade_version ] >= 0 ) ||

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version_compare( $upgrade_version, static::CURRENT_VERSION, '>' ) ||

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! class_exists( $class )

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) {

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continue;

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}

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$this->maybe_create_tables();

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if ( ! isset( $this->migrated[ $upgrade_version ] ) ) {

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$this->migrated[ $upgrade_version ] = static::STARTED;

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$this->log( sprintf( 'Migration of %1$s to %2$s started.', $plugin_name, $upgrade_version ) );

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}

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// Run upgrade.

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$migrated = ( new $class( $this ) )->run();

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$is_upgrade = true;

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// Some migration methods can be called several times to support AS action,

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// so do not log their completion here.

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if ( $migrated === null ) {

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continue;

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}

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$this->migrated[ $upgrade_version ] = $migrated ? time() : static::FAILED;

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$this->log_migration_message( $migrated, $plugin_name, $upgrade_version );

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}

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}

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/**

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* Runs when the core plugin has been upgraded.

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* @since 1.8.8

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private function core_upgraded() {

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if ( ! $this->is_core_plugin() ) {

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return;

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}

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// Store the previous version from which the core plugin was upgraded.

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$upgraded_from = get_option( static::UPGRADED_FROM_OPTION_NAME, '' );

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// Store the previous core version in the option.

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update_option( static::PREVIOUS_CORE_VERSION_OPTION_NAME, $upgraded_from );

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/**

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* Fires after the core plugin has been upgraded.

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* Please note: some of the migrations that run via Active Scheduler can be not completed yet.

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* @since 1.8.8

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* @param string $upgraded_from The version from which the core plugin was upgraded.

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* @param Base $migration_obj The migration class instance.

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do_action( 'wpforms_migrations_base_core_upgraded', $upgraded_from, $this );

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}

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/**

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* If upgrade has occurred, update versions option in the database.

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* @since 1.7.5

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public function update_versions() {

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// Retrieve the last migrated versions.

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$last_migrated = get_option( static::MIGRATED_OPTION_NAME, [] );

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$migrated = array_merge( $last_migrated, $this->migrated );

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/**

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* Store current version upgrade timestamp even if there were no migrations to it.

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* We need it in wpforms_get_upgraded_timestamp() for further usage in Event Driven Plugin Notifications.

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$migrated[ static::CURRENT_VERSION ] = $migrated[ static::CURRENT_VERSION ] ?? time();

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uksort( $last_migrated, 'version_compare' );

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uksort( $migrated, 'version_compare' );

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if ( $migrated === $last_migrated ) {

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return;

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}

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update_option( static::MIGRATED_OPTION_NAME, $migrated );

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$fully_completed = array_reduce(

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$migrated,

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static function ( $carry, $status ) {

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return $carry && ( $status >= 0 );

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true

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);

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if ( ! $fully_completed ) {

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return;

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}

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$this->log(

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sprintf( 'Migration of %1$s to %2$s is fully completed.', static::PLUGIN_NAME, static::CURRENT_VERSION )

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);

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// We need to run further only for core plugin (Lite and Pro).

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if ( ! $this->is_core_plugin() ) {

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return;

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}

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$last_completed = array_filter(

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$last_migrated,

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static function ( $status ) {

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return $status >= 0;

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}

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);

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if ( ! $last_completed ) {

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return;

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}

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// Store the current core version in the option.

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update_option( static::UPGRADED_FROM_OPTION_NAME, $this->get_max_version( $last_completed ) );

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$this->core_upgraded();

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}

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/**

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* Get upgrade classes.

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* @since 1.7.5

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* @return string[]

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protected function get_upgrade_classes(): array {

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$classes = static::UPGRADE_CLASSES;

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sort( $classes );

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return $classes;

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}

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/**

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* Get an upgrade version from the class name.

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* @since 1.7.5

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* @param string $class_name Class name.

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* @return string

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protected function get_upgrade_version( string $class_name ): string {

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// Find only the digits and underscores to get version number.

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if ( ! preg_match( '/(\d_?)+/', $class_name, $matches ) ) {

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return '';

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}

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$raw_version = $matches[0];

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if ( strpos( $raw_version, '_' ) ) {

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// Modern notation: 1_10_0_3 means 1.10.0.3 version.

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return str_replace( '_', '.', $raw_version );

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}

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// Legacy notation, with 1-digit subversion numbers: 1751 means 1.7.5.1 version.

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return implode( '.', str_split( $raw_version ) );

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}

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/**

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* Get plugin/addon name.

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* @since 1.7.5

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* @param string $class_name Upgrade class name.

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* @return string

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* @noinspection PhpUnusedParameterInspection

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protected function get_plugin_name( string $class_name ): string { // phpcs:ignore Generic.CodeAnalysis.UnusedFunctionParameter.Found

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return static::PLUGIN_NAME;

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}

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/**

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* Log message to WPForms logger and standard debug.log file.

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* @since 1.7.5

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* @param string $message The error message that should be logged.

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* @noinspection ForgottenDebugOutputInspection

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* @noinspection PhpUndefinedConstantInspection

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protected function log( string $message ) {

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if ( defined( 'WPFORMS_DEBUG' ) && WPFORMS_DEBUG ) {

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// phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_error_log

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error_log( $message );

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wpforms_log( 'Migration', $message, [ 'type' => 'log' ] );

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}

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}

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/**

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* Determine if migration is allowed.

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* @since 1.7.5

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private function is_allowed(): bool {

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// phpcs:ignore WordPress.Security.NonceVerification.Recommended

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if ( isset( $_GET['service-worker'] ) ) {

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return false;

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}

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return wp_doing_cron() || is_admin() || wpforms_doing_wp_cli();

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}

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/**

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* Maybe create custom plugin tables.

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* @since 1.7.6

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public function maybe_create_tables() {

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if ( $this->tables_check_done ) {

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/**

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* We should do tables check only once - when the first migration has been started.

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* The DB::get_existing_custom_tables() without caching causes performance issue

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* on huge multisite with thousands of tables.

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return;

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}

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// We need actual information about existing tables, so drop the cache.

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Transient::delete( DB::EXISTING_TABLES_TRANSIENT_NAME );

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$custom_tables = DB::get_existing_custom_tables();

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foreach ( static::CUSTOM_TABLE_HANDLER_CLASSES as $custom_table_handler_class ) {

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if ( ! class_exists( $custom_table_handler_class ) ) {

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continue;

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}

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$custom_table_handler = new $custom_table_handler_class();

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if ( ! in_array( $custom_table_handler->table_name, $custom_tables, true ) ) {

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$custom_table_handler->create_table();

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}

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}

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$this->tables_check_done = true;

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}

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/**

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* Maybe convert the migration option format.

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* @since 1.7.5

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private function maybe_convert_migration_option() {

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/**

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* Retrieve the migration option and check its format.

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* Old format: a string 'x.y.z' containing the last migrated version.

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* New format: [ 'x.y.z' => {status}, 'x1.y1.z1' => {status}... ],

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* where {status} is a migration status.

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* Negative means some status (-1 for 'started' etc.),

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* zero means completed earlier at unknown time,

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* positive means completion timestamp.

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$this->migrated = get_option( static::MIGRATED_OPTION_NAME );

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// If the option is an array, it means that it is already converted to the new format.

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if ( is_array( $this->migrated ) ) {

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return;

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}

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/**

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* Convert the option to the new format.

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* Old option names contained 'version',

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* like 'wpforms_version', 'wpforms_version_lite', 'wpforms_stripe_version' etc.

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* We preserve old options for downgrade cases.

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* New option names should contain 'versions' and be like 'wpforms_versions' etc.

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$this->migrated = get_option(

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str_replace( 'versions', 'version', static::MIGRATED_OPTION_NAME )

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);

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$version = $this->migrated === false ? self::INITIAL_FAKE_VERSION : (string) $this->migrated;

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$timestamp = $version === static::CURRENT_VERSION ? time() : 0;

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$this->migrated = [ $version => $timestamp ];

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$max_version = $this->get_max_version( $this->migrated );

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foreach ( $this->get_upgrade_classes() as $upgrade_class ) {

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$upgrade_version = $this->get_upgrade_version( $upgrade_class );

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if (

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! isset( $this->migrated[ $upgrade_version ] ) &&

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version_compare( $upgrade_version, $max_version, '<' )

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) {

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$this->migrated[ $upgrade_version ] = 0;

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}

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}

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unset( $this->migrated[ self::INITIAL_FAKE_VERSION ] );

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ksort( $this->migrated );

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update_option( static::MIGRATED_OPTION_NAME, $this->migrated );

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}

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/**

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* Get the max version.

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* @since 1.7.5

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* @param array $versions Versions.

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* @return string

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private function get_max_version( array $versions ): string {

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// phpcs:ignore WPForms.Formatting.EmptyLineBeforeReturn.RemoveEmptyLineBeforeReturnStatement

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return array_reduce(

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array_keys( $versions ),

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static function ( $carry, $version ) {

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return version_compare( $version, $carry, '>' ) ? $version : $carry;

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