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<?php
namespace Elementor\Modules\Variables\Storage;
use Elementor\Core\Kits\Documents\Kit;
use Elementor\Modules\AtomicWidgets\Utils;
use Elementor\Modules\Variables\Storage\Exceptions\DuplicatedLabel;
use Elementor\Modules\Variables\Storage\Exceptions\RecordNotFound;
use Elementor\Modules\Variables\Storage\Exceptions\VariablesLimitReached;
use Elementor\Modules\Variables\Storage\Exceptions\FatalError;
use Elementor\Modules\Variables\Storage\Exceptions\BatchOperationFailed;
use Exception;
if ( ! defined( 'ABSPATH' ) ) {
exit; // Exit if accessed directly.
}
class Repository {
const TOTAL_VARIABLES_COUNT = 100;
const FORMAT_VERSION_V1 = 1;
const VARIABLES_META_KEY = '_elementor_global_variables';
private Kit $kit;
public function __construct( Kit $kit ) {
$this->kit = $kit;
}
/**
* @throws VariablesLimitReached
*/
private function assert_if_variables_limit_reached( array $db_record ) {
$variables_in_use = 0;
foreach ( $db_record['data'] as $variable ) {
if ( isset( $variable['deleted'] ) && $variable['deleted'] ) {
continue;
}
++$variables_in_use;
}
if ( self::TOTAL_VARIABLES_COUNT < $variables_in_use ) {
throw new VariablesLimitReached( 'Total variables count limit reached' );
}
}
/**
* @throws DuplicatedLabel
*/
private function assert_if_variable_label_is_duplicated( array $db_record, array $variable = [] ) {
foreach ( $db_record['data'] as $id => $existing_variable ) {
if ( isset( $existing_variable['deleted'] ) && $existing_variable['deleted'] ) {
continue;
}
if ( isset( $variable['id'] ) && $variable['id'] === $id ) {
continue;
}
if ( ! isset( $variable['label'] ) || ! isset( $existing_variable['label'] ) ) {
continue;
}
if ( strtolower( $existing_variable['label'] ) === strtolower( $variable['label'] ) ) {
throw new DuplicatedLabel( 'Variable label already exists' );
}
}
}
public function variables(): array {
$db_record = $this->load();
return $db_record['data'] ?? [];
}
public function load(): array {
$db_record = $this->kit->get_json_meta( static::VARIABLES_META_KEY );
if ( is_array( $db_record ) && ! empty( $db_record ) ) {
return $db_record;
}
return $this->get_default_meta();
}
/**
* @throws FatalError
*/
public function create( array $variable ) {
$db_record = $this->load();
$list_of_variables = $db_record['data'] ?? [];
$id = $this->new_id_for( $list_of_variables );
$new_variable = $this->extract_from( $variable, [
'type',
'label',
'value',
] );
$this->assert_if_variable_label_is_duplicated( $db_record, $new_variable );
$list_of_variables[ $id ] = $new_variable;
$db_record['data'] = $list_of_variables;
$this->assert_if_variables_limit_reached( $db_record );
$watermark = $this->save( $db_record );
if ( false === $watermark ) {
throw new FatalError( 'Failed to create variable' );
}
return [
'variable' => array_merge( [ 'id' => $id ], $list_of_variables[ $id ] ),
'watermark' => $watermark,
];
}
/**
* @throws RecordNotFound
* @throws FatalError
*/
public function update( string $id, array $variable ) {
$db_record = $this->load();
$list_of_variables = $db_record['data'] ?? [];
if ( ! isset( $list_of_variables[ $id ] ) ) {
throw new RecordNotFound( 'Variable not found' );
}
$updated_variable = array_merge( $list_of_variables[ $id ], $this->extract_from( $variable, [
'label',
'value',
] ) );
$this->assert_if_variable_label_is_duplicated( $db_record, array_merge( $updated_variable, [ 'id' => $id ] ) );
$list_of_variables[ $id ] = $updated_variable;
$db_record['data'] = $list_of_variables;
$watermark = $this->save( $db_record );
if ( false === $watermark ) {
throw new FatalError( 'Failed to update variable' );
}
return [
'variable' => array_merge( [ 'id' => $id ], $list_of_variables[ $id ] ),
'watermark' => $watermark,
];
}
/**
* @throws RecordNotFound
* @throws FatalError
*/
public function delete( string $id ) {
$db_record = $this->load();
$list_of_variables = $db_record['data'] ?? [];
if ( ! isset( $list_of_variables[ $id ] ) ) {
throw new RecordNotFound( 'Variable not found' );
}
$list_of_variables[ $id ]['deleted'] = true;
$list_of_variables[ $id ]['deleted_at'] = $this->now();
$db_record['data'] = $list_of_variables;
$watermark = $this->save( $db_record );
if ( false === $watermark ) {
throw new FatalError( 'Failed to delete variable' );
}
return [
'variable' => array_merge( [ 'id' => $id ], $list_of_variables[ $id ] ),
'watermark' => $watermark,
];
}
/**
* @throws RecordNotFound
* @throws FatalError
*/
public function restore( string $id, $overrides = [] ) {
$db_record = $this->load();
$list_of_variables = $db_record['data'] ?? [];
if ( ! isset( $list_of_variables[ $id ] ) ) {
throw new RecordNotFound( 'Variable not found' );
}
$restored_variable = $this->extract_from( $list_of_variables[ $id ], [
'label',
'value',
'type',
] );
if ( array_key_exists( 'label', $overrides ) ) {
$restored_variable['label'] = $overrides['label'];
}
if ( array_key_exists( 'value', $overrides ) ) {
$restored_variable['value'] = $overrides['value'];
}
$this->assert_if_variable_label_is_duplicated( $db_record, array_merge( $restored_variable, [ 'id' => $id ] ) );
$list_of_variables[ $id ] = $restored_variable;
$db_record['data'] = $list_of_variables;
$this->assert_if_variables_limit_reached( $db_record );
$watermark = $this->save( $db_record );
if ( false === $watermark ) {
throw new FatalError( 'Failed to restore variable' );
}
return [
'variable' => array_merge( [ 'id' => $id ], $restored_variable ),
'watermark' => $watermark,
];
}
/**
* Process multiple operations atomically
*
* @throws BatchOperationFailed
* @throws FatalError
*/
public function process_atomic_batch( array $operations, int $expected_watermark ): array {
$db_record = $this->load();
$results = [];
$errors = [];
foreach ( $operations as $index => $operation ) {
try {
$result = $this->process_single_operation( $db_record, $operation );
$results[] = $result;
} catch ( Exception $e ) {
$operation_id = $this->get_operation_identifier( $operation, $index );
$errors[ $operation_id ] = [
'status' => $this->get_error_status_code( $e ),
'message' => $e->getMessage(),
];
}
}
if ( ! empty( $errors ) ) {
$error_details = [];
foreach ( $errors as $operation_id => $error ) {
$error_details[ esc_html( $operation_id ) ] = [
'status' => (int) $error['status'],
'message' => esc_html( $error['message'] ),
];
}
// phpcs:ignore WordPress.Security.EscapeOutput.ExceptionNotEscaped
throw new BatchOperationFailed( 'Batch operation failed', $error_details );
}
$watermark = $this->save( $db_record );
if ( false === $watermark ) {
throw new FatalError( 'Failed to save batch operations' );
}
return [
'success' => true,
'watermark' => $watermark,
'results' => $results,
];
}
private function process_single_operation( array &$db_record, array $operation ): array {
switch ( $operation['type'] ) {
case 'create':
return $this->process_create_operation( $db_record, $operation );
case 'update':
return $this->process_update_operation( $db_record, $operation );
case 'delete':
return $this->process_delete_operation( $db_record, $operation );
case 'restore':
return $this->process_restore_operation( $db_record, $operation );
default:
throw new BatchOperationFailed( 'Invalid operation type: ' . esc_html( $operation['type'] ), [] );
}
}
private function process_create_operation( array &$db_record, array $operation ): array {
$variable_data = $operation['variable'];
$temp_id = $variable_data['id'] ?? null;
$new_variable = $this->extract_from( $variable_data, [ 'type', 'label', 'value' ] );
$this->assert_if_variable_label_is_duplicated( $db_record, $new_variable );
$this->assert_if_variables_limit_reached( $db_record );
$id = $this->new_id_for( $db_record['data'] );
$now = $this->now();
$new_variable['created_at'] = $now;
$new_variable['updated_at'] = $now;
$db_record['data'][ $id ] = $new_variable;
return [
'id' => $id,
'variable' => array_merge( [ 'id' => $id ], $new_variable ),
'temp_id' => $temp_id,
];
}
private function process_update_operation( array &$db_record, array $operation ): array {
$id = $operation['id'];
$variable_data = $operation['variable'];
if ( ! isset( $db_record['data'][ $id ] ) ) {
throw new \Elementor\Modules\Variables\Storage\Exceptions\RecordNotFound( 'Variable not found' );
}
$updated_fields = $this->extract_from( $variable_data, [ 'label', 'value' ] );
$updated_variable = array_merge( $db_record['data'][ $id ], $updated_fields );
$updated_variable['updated_at'] = $this->now();
$this->assert_if_variable_label_is_duplicated( $db_record, array_merge( $updated_variable, [ 'id' => $id ] ) );
$db_record['data'][ $id ] = $updated_variable;
return [
'id' => $id,
'variable' => array_merge( [ 'id' => $id ], $updated_variable ),
];
}
private function process_delete_operation( array &$db_record, array $operation ): array {
$id = $operation['id'];
if ( ! isset( $db_record['data'][ $id ] ) ) {
throw new RecordNotFound( 'Variable not found' );
}
$db_record['data'][ $id ]['deleted'] = true;
$db_record['data'][ $id ]['deleted_at'] = $this->now();
return [
'id' => $id,
'deleted' => true,
];
}
private function process_restore_operation( array &$db_record, array $operation ): array {
$id = $operation['id'];
if ( ! isset( $db_record['data'][ $id ] ) ) {
throw new RecordNotFound( 'Variable not found' );
}
$overrides = [];
if ( isset( $operation['label'] ) ) {
$overrides['label'] = $operation['label'];
}
if ( isset( $operation['value'] ) ) {
$overrides['value'] = $operation['value'];
}
$restored_variable = $this->extract_from( $db_record['data'][ $id ], [ 'label', 'value', 'type' ] );
$restored_variable = array_merge( $restored_variable, $overrides );
$restored_variable['updated_at'] = $this->now();
$this->assert_if_variable_label_is_duplicated( $db_record, array_merge( $restored_variable, [ 'id' => $id ] ) );
$this->assert_if_variables_limit_reached( $db_record );
$db_record['data'][ $id ] = $restored_variable;
return [
'id' => $id,
'variable' => array_merge( [ 'id' => $id ], $restored_variable ),
];
}
private function get_operation_identifier( array $operation, int $index ): string {
if ( 'create' === $operation['type'] && isset( $operation['variable']['id'] ) ) {
return $operation['variable']['id'];
}
if ( isset( $operation['id'] ) ) {
return $operation['id'];
}
return "operation_{$index}";
}
private function get_error_status_code( Exception $e ): int {
if ( $e instanceof RecordNotFound ) {
return 404;
}
if ( $e instanceof DuplicatedLabel ||
$e instanceof VariablesLimitReached ) {
return 400;
}
return 500;
}
private function save( array $db_record ) {
if ( PHP_INT_MAX === $db_record['watermark'] ) {
$db_record['watermark'] = 0;
}
++$db_record['watermark'];
if ( $this->kit->update_json_meta( static::VARIABLES_META_KEY, $db_record ) ) {
return $db_record['watermark'];
}
return false;
}
private function new_id_for( array $list_of_variables ): string {
return Utils::generate_id( 'e-gv-', array_keys( $list_of_variables ) );
}
private function now(): string {
return gmdate( 'Y-m-d H:i:s' );
}
private function extract_from( array $source, array $fields ): array {
return array_intersect_key( $source, array_flip( $fields ) );
}
private function get_default_meta(): array {
return [
'data' => [],
'watermark' => 0,
'version' => self::FORMAT_VERSION_V1,
];
}
}