class Update10101

class Update10101 implements ContainerInjectionInterface {
    
    /**
     * Sequence owner update constructor.
     *
     * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entityTypeManager
     *   The entity type manager.
     * @param \Drupal\Core\Entity\EntityLastInstalledSchemaRepositoryInterface $entityLastInstalledSchemaRepository
     *   The last installed schema repository service.
     * @param \Drupal\Core\Database\Connection $connection
     *   The database connection.
     * @param \Drupal\Core\Extension\ModuleExtensionList $moduleExtensionList
     *   The module extension list.
     * @param \Drupal\Core\Extension\ModuleHandlerInterface $moduleHandler
     *   The module handler service.
     */
    public function __construct(EntityTypeManagerInterface $entityTypeManager, EntityLastInstalledSchemaRepositoryInterface $entityLastInstalledSchemaRepository, Connection $connection, ModuleExtensionList $moduleExtensionList, ModuleHandlerInterface $moduleHandler) {
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container) {
        return new static($container->get('entity_type.manager'), $container->get('entity.last_installed_schema.repository'), $container->get('database'), $container->get('extension.list.module'), $container->get('module_handler'));
    }
    
    /**
     * Update *all* existing sequences to include the owner tables.
     *
     * @param array $sandbox
     *   Stores information for batch updates.
     *
     * @return \Drupal\Core\StringTranslation\PluralTranslatableMarkup|null
     *   Returns the amount of orphaned sequences fixed.
     */
    public function update(array &$sandbox) : ?PluralTranslatableMarkup {
        if ($this->connection
            ->databaseType() !== 'pgsql') {
            // This database update is a no-op for all other core database drivers.
            $sandbox['#finished'] = 1;
            return NULL;
        }
        if (!isset($sandbox['progress'])) {
            $sandbox['fixed'] = 0;
            $sandbox['progress'] = 0;
            $sandbox['tables'] = [];
            // Discovers all tables defined with hook_schema().
            // @todo We need to add logic to do the same for on-demand tables. See
            //   https://www.drupal.org/i/3358777
            $modules = $this->moduleExtensionList
                ->getList();
            foreach ($modules as $extension) {
                $module = $extension->getName();
                $this->moduleHandler
                    ->loadInclude($module, 'install');
                $schema = $this->moduleHandler
                    ->invoke($module, 'schema');
                if (!empty($schema)) {
                    foreach ($schema as $table_name => $table_info) {
                        foreach ($table_info['fields'] as $column_name => $column_info) {
                            if (str_starts_with($column_info['type'], 'serial')) {
                                $sandbox['tables'][] = [
                                    'table' => $table_name,
                                    'column' => $column_name,
                                ];
                            }
                        }
                    }
                }
            }
            // Discovers all content entity types with integer entity keys that are
            // most likely serial columns.
            $entity_types = $this->entityTypeManager
                ->getDefinitions();
            
            /** @var \Drupal\Core\Entity\EntityTypeInterface $entity_type */
            foreach ($entity_types as $entity_type) {
                $storage_class = $entity_type->getStorageClass();
                if (is_subclass_of($storage_class, SqlContentEntityStorage::class)) {
                    $id_key = $entity_type->getKey('id');
                    $revision_key = $entity_type->getKey('revision');
                    $original_storage_definitions = $this->entityLastInstalledSchemaRepository
                        ->getLastInstalledFieldStorageDefinitions($entity_type->id());
                    if ($original_storage_definitions[$id_key]->getType() === 'integer') {
                        $sandbox['tables'][] = [
                            'table' => $entity_type->getBaseTable(),
                            'column' => $id_key,
                        ];
                    }
                    if ($entity_type->isRevisionable() && $original_storage_definitions[$revision_key]->getType() === 'integer') {
                        $sandbox['tables'][] = [
                            'table' => $entity_type->getRevisionTable(),
                            'column' => $revision_key,
                        ];
                    }
                }
            }
            $sandbox['max'] = count($sandbox['tables']);
        }
        else {
            // Adds ownership of orphan sequences to tables.
            $to_process = array_slice($sandbox['tables'], $sandbox['progress'], 50);
            // Ensures that a sequence is not owned first, then ensures that the a
            // sequence exists at all before trying to alter it.
            foreach ($to_process as $table_info) {
                if ($this->connection
                    ->schema()
                    ->tableExists($table_info['table'])) {
                    $owned = (bool) $this->getSequenceName($table_info['table'], $table_info['column']);
                    if (!$owned) {
                        $sequence_name = $this->connection
                            ->makeSequenceName($table_info['table'], $table_info['column']);
                        $exists = $this->sequenceExists($sequence_name);
                        if ($exists) {
                            $transaction = $this->connection
                                ->startTransaction($sequence_name);
                            try {
                                $this->updateSequenceOwnership($sequence_name, $table_info['table'], $table_info['column']);
                                $sandbox['fixed']++;
                            } catch (DatabaseExceptionWrapper $e) {
                                $transaction->rollBack();
                            }
                        }
                    }
                }
                $sandbox['progress']++;
            }
        }
        if ($sandbox['max'] && $sandbox['progress'] < $sandbox['max']) {
            $sandbox['#finished'] = $sandbox['progress'] / $sandbox['max'];
            return NULL;
        }
        else {
            $sandbox['#finished'] = 1;
            return new PluralTranslatableMarkup($sandbox['fixed'], '1 orphaned sequence fixed.', '@count orphaned sequences fixed');
        }
    }
    
    /**
     * Alters the ownership of a sequence.
     *
     * This is used for updating orphaned sequences.
     *
     * @param string $sequence_name
     *   The appropriate sequence name for a given table and serial field.
     * @param string $table
     *   The unquoted or prefixed table name.
     * @param string $column
     *   The column name for the sequence.
     *
     * @see https://www.drupal.org/i/3028706
     */
    private function updateSequenceOwnership(string $sequence_name, string $table, string $column) : void {
        $this->connection
            ->query('ALTER SEQUENCE IF EXISTS ' . $sequence_name . ' OWNED BY {' . $table . '}.[' . $column . ']');
    }
    
    /**
     * Retrieves a sequence name that is owned by the table and column.
     *
     * @param string $table
     *   A table name that is not prefixed or quoted.
     * @param string $column
     *   The column name.
     *
     * @return string|null
     *   The name of the sequence or NULL if it does not exist.
     */
    public function getSequenceName(string $table, string $column) : ?string {
        return $this->connection
            ->query("SELECT pg_get_serial_sequence(:table, :column)", [
            ':table' => $this->connection
                ->getPrefix() . $table,
            ':column' => $column,
        ])
            ->fetchField();
    }
    
    /**
     * Checks if a sequence exists.
     *
     * @param string $name
     *   The fully-qualified sequence name.
     *
     * @return bool
     *   TRUE if the sequence exists by the name.
     *
     * @see \Drupal\pgsql\Driver\Database\pgsql\Connection::makeSequenceName()
     */
    private function sequenceExists(string $name) : bool {
        return (bool) \Drupal::database()->query("SELECT c.relname FROM pg_class as c WHERE c.relkind = 'S' AND c.relname = :name", [
            ':name' => $name,
        ])
            ->fetchField();
    }

}