_wp_prepare_json_schema_for_client_with_allowed_keywords( array $schema, array $allowed_keywords ): array<string,

106function _wp_prepare_json_schema_for_client_with_allowed_keywords( array $schema, array $allowed_keywords ): array {107	if ( isset( $schema['type'] ) && 'object' === $schema['type'] && isset( $schema['default'] ) ) {108		$default = $schema['default'];109		if ( is_array( $default ) && empty( $default ) ) {110			$schema['default'] = (object) $default;111		}112	}113 114	$schema = array_intersect_key( $schema, $allowed_keywords );115 116	/*117	 * Collect draft-03 per-property `required: true` flags into a draft-04118	 * `required` array of property names on the parent object schema.119	 *120	 * This mirrors rest_validate_object_value_from_schema(), where a draft-04121	 * `required` array takes precedence: when one is present, per-property122	 * booleans are ignored during validation. They are therefore left out of123	 * the array here as well (but still stripped from the output) so the124	 * published schema describes exactly what gets enforced.125	 */126	if ( isset( $schema['properties'] ) && is_array( $schema['properties'] ) ) {127		$has_required_array = isset( $schema['required'] ) && is_array( $schema['required'] );128		$required           = array();129		foreach ( $schema['properties'] as $property => &$property_schema ) {130			if ( is_array( $property_schema ) && ! wp_is_numeric_array( $property_schema ) && isset( $property_schema['required'] ) && is_bool( $property_schema['required'] ) ) {131				if ( ! $has_required_array && true === $property_schema['required'] ) {132					$required[] = (string) $property;133				}134				unset( $property_schema['required'] );135			}136		}137		unset( $property_schema );138 139		/*140		 * Property keys are unique, so the collected list needs no deduplication.141		 * When a draft-04 array is already present, leave it untouched.142		 */143		if ( ! $has_required_array && count( $required ) > 0 ) {144			$schema['required'] = $required;145		}146	}147 148	/*149	 * A boolean `required` outside of an object's property list has no draft-04150	 * equivalent, so drop it rather than emit an invalid keyword.151	 */152	if ( isset( $schema['required'] ) && is_bool( $schema['required'] ) ) {153		unset( $schema['required'] );154	}155 156	/*157	 * Sub-schema maps: keys are user-defined, values are sub-schemas.158	 * Note: 'dependencies' values can also be property-dependency arrays159	 * (numeric arrays of strings) which are skipped via wp_is_numeric_array().160	 */161	foreach ( array( 'properties', 'patternProperties', 'definitions', 'dependencies' ) as $keyword ) {162		if ( isset( $schema[ $keyword ] ) && is_array( $schema[ $keyword ] ) ) {163			foreach ( $schema[ $keyword ] as $key => $child_schema ) {164				if ( is_array( $child_schema ) && ! wp_is_numeric_array( $child_schema ) ) {165					$schema[ $keyword ][ $key ] = _wp_prepare_json_schema_for_client_with_allowed_keywords( $child_schema, $allowed_keywords );166				}167			}168		}169	}170 171	// Single sub-schema keywords.172	foreach ( array( 'not', 'additionalProperties', 'additionalItems' ) as $keyword ) {173		if ( isset( $schema[ $keyword ] ) && is_array( $schema[ $keyword ] ) && ! wp_is_numeric_array( $schema[ $keyword ] ) ) {174			$schema[ $keyword ] = _wp_prepare_json_schema_for_client_with_allowed_keywords( $schema[ $keyword ], $allowed_keywords );175		}176	}177 178	// Items: single schema or tuple array of schemas.179	if ( isset( $schema['items'] ) && is_array( $schema['items'] ) ) {180		if ( ! wp_is_numeric_array( $schema['items'] ) ) {181			$schema['items'] = _wp_prepare_json_schema_for_client_with_allowed_keywords( $schema['items'], $allowed_keywords );182		} else {183			foreach ( $schema['items'] as $index => $item_schema ) {184				if ( is_array( $item_schema ) && ! wp_is_numeric_array( $item_schema ) ) {185					$schema['items'][ $index ] = _wp_prepare_json_schema_for_client_with_allowed_keywords( $item_schema, $allowed_keywords );