500 lines
14 KiB
PHP
500 lines
14 KiB
PHP
<?php
|
|
/**
|
|
* REST API: WP_REST_Meta_Fields class
|
|
*
|
|
* @package WordPress
|
|
* @subpackage REST_API
|
|
* @since 4.7.0
|
|
*/
|
|
|
|
/**
|
|
* Core class to manage meta values for an object via the REST API.
|
|
*
|
|
* @since 4.7.0
|
|
*/
|
|
abstract class WP_REST_Meta_Fields {
|
|
|
|
/**
|
|
* Retrieves the object meta type.
|
|
*
|
|
* @since 4.7.0
|
|
*
|
|
* @return string One of 'post', 'comment', 'term', 'user', or anything
|
|
* else supported by `_get_meta_table()`.
|
|
*/
|
|
abstract protected function get_meta_type();
|
|
|
|
/**
|
|
* Retrieves the object meta subtype.
|
|
*
|
|
* @since 5.0.0
|
|
*
|
|
* @return string Subtype for the meta type, or empty string if no specific subtype.
|
|
*/
|
|
protected function get_meta_subtype() {
|
|
return '';
|
|
}
|
|
|
|
/**
|
|
* Retrieves the object type for register_rest_field().
|
|
*
|
|
* @since 4.7.0
|
|
*
|
|
* @return string The REST field type, such as post type name, taxonomy name, 'comment', or `user`.
|
|
*/
|
|
abstract protected function get_rest_field_type();
|
|
|
|
/**
|
|
* Registers the meta field.
|
|
*
|
|
* @since 4.7.0
|
|
*
|
|
* @see register_rest_field()
|
|
*/
|
|
public function register_field() {
|
|
register_rest_field(
|
|
$this->get_rest_field_type(), 'meta', array(
|
|
'get_callback' => array( $this, 'get_value' ),
|
|
'update_callback' => array( $this, 'update_value' ),
|
|
'schema' => $this->get_field_schema(),
|
|
)
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Retrieves the meta field value.
|
|
*
|
|
* @since 4.7.0
|
|
*
|
|
* @param int $object_id Object ID to fetch meta for.
|
|
* @param WP_REST_Request $request Full details about the request.
|
|
* @return WP_Error|object Object containing the meta values by name, otherwise WP_Error object.
|
|
*/
|
|
public function get_value( $object_id, $request ) {
|
|
$fields = $this->get_registered_fields();
|
|
$response = array();
|
|
|
|
foreach ( $fields as $meta_key => $args ) {
|
|
$name = $args['name'];
|
|
$all_values = get_metadata( $this->get_meta_type(), $object_id, $meta_key, false );
|
|
if ( $args['single'] ) {
|
|
if ( empty( $all_values ) ) {
|
|
$value = $args['schema']['default'];
|
|
} else {
|
|
$value = $all_values[0];
|
|
}
|
|
$value = $this->prepare_value_for_response( $value, $request, $args );
|
|
} else {
|
|
$value = array();
|
|
foreach ( $all_values as $row ) {
|
|
$value[] = $this->prepare_value_for_response( $row, $request, $args );
|
|
}
|
|
}
|
|
|
|
$response[ $name ] = $value;
|
|
}
|
|
|
|
return $response;
|
|
}
|
|
|
|
/**
|
|
* Prepares a meta value for a response.
|
|
*
|
|
* This is required because some native types cannot be stored correctly
|
|
* in the database, such as booleans. We need to cast back to the relevant
|
|
* type before passing back to JSON.
|
|
*
|
|
* @since 4.7.0
|
|
*
|
|
* @param mixed $value Meta value to prepare.
|
|
* @param WP_REST_Request $request Current request object.
|
|
* @param array $args Options for the field.
|
|
* @return mixed Prepared value.
|
|
*/
|
|
protected function prepare_value_for_response( $value, $request, $args ) {
|
|
if ( ! empty( $args['prepare_callback'] ) ) {
|
|
$value = call_user_func( $args['prepare_callback'], $value, $request, $args );
|
|
}
|
|
|
|
return $value;
|
|
}
|
|
|
|
/**
|
|
* Updates meta values.
|
|
*
|
|
* @since 4.7.0
|
|
*
|
|
* @param array $meta Array of meta parsed from the request.
|
|
* @param int $object_id Object ID to fetch meta for.
|
|
* @return WP_Error|null WP_Error if one occurs, null on success.
|
|
*/
|
|
public function update_value( $meta, $object_id ) {
|
|
$fields = $this->get_registered_fields();
|
|
foreach ( $fields as $meta_key => $args ) {
|
|
$name = $args['name'];
|
|
if ( ! array_key_exists( $name, $meta ) ) {
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* A null value means reset the field, which is essentially deleting it
|
|
* from the database and then relying on the default value.
|
|
*/
|
|
if ( is_null( $meta[ $name ] ) ) {
|
|
$result = $this->delete_meta_value( $object_id, $meta_key, $name );
|
|
if ( is_wp_error( $result ) ) {
|
|
return $result;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
$is_valid = rest_validate_value_from_schema( $meta[ $name ], $args['schema'], 'meta.' . $name );
|
|
if ( is_wp_error( $is_valid ) ) {
|
|
$is_valid->add_data( array( 'status' => 400 ) );
|
|
return $is_valid;
|
|
}
|
|
|
|
$value = rest_sanitize_value_from_schema( $meta[ $name ], $args['schema'] );
|
|
|
|
if ( $args['single'] ) {
|
|
$result = $this->update_meta_value( $object_id, $meta_key, $name, $value );
|
|
} else {
|
|
$result = $this->update_multi_meta_value( $object_id, $meta_key, $name, $value );
|
|
}
|
|
|
|
if ( is_wp_error( $result ) ) {
|
|
return $result;
|
|
}
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Deletes a meta value for an object.
|
|
*
|
|
* @since 4.7.0
|
|
*
|
|
* @param int $object_id Object ID the field belongs to.
|
|
* @param string $meta_key Key for the field.
|
|
* @param string $name Name for the field that is exposed in the REST API.
|
|
* @return bool|WP_Error True if meta field is deleted, WP_Error otherwise.
|
|
*/
|
|
protected function delete_meta_value( $object_id, $meta_key, $name ) {
|
|
$meta_type = $this->get_meta_type();
|
|
if ( ! current_user_can( "delete_{$meta_type}_meta", $object_id, $meta_key ) ) {
|
|
return new WP_Error(
|
|
'rest_cannot_delete',
|
|
/* translators: %s: custom field key */
|
|
sprintf( __( 'Sorry, you are not allowed to edit the %s custom field.' ), $name ),
|
|
array(
|
|
'key' => $name,
|
|
'status' => rest_authorization_required_code(),
|
|
)
|
|
);
|
|
}
|
|
|
|
if ( ! delete_metadata( $meta_type, $object_id, wp_slash( $meta_key ) ) ) {
|
|
return new WP_Error(
|
|
'rest_meta_database_error',
|
|
__( 'Could not delete meta value from database.' ),
|
|
array(
|
|
'key' => $name,
|
|
'status' => WP_Http::INTERNAL_SERVER_ERROR,
|
|
)
|
|
);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Updates multiple meta values for an object.
|
|
*
|
|
* Alters the list of values in the database to match the list of provided values.
|
|
*
|
|
* @since 4.7.0
|
|
*
|
|
* @param int $object_id Object ID to update.
|
|
* @param string $meta_key Key for the custom field.
|
|
* @param string $name Name for the field that is exposed in the REST API.
|
|
* @param array $values List of values to update to.
|
|
* @return bool|WP_Error True if meta fields are updated, WP_Error otherwise.
|
|
*/
|
|
protected function update_multi_meta_value( $object_id, $meta_key, $name, $values ) {
|
|
$meta_type = $this->get_meta_type();
|
|
if ( ! current_user_can( "edit_{$meta_type}_meta", $object_id, $meta_key ) ) {
|
|
return new WP_Error(
|
|
'rest_cannot_update',
|
|
/* translators: %s: custom field key */
|
|
sprintf( __( 'Sorry, you are not allowed to edit the %s custom field.' ), $name ),
|
|
array(
|
|
'key' => $name,
|
|
'status' => rest_authorization_required_code(),
|
|
)
|
|
);
|
|
}
|
|
|
|
$current = get_metadata( $meta_type, $object_id, $meta_key, false );
|
|
|
|
$to_remove = $current;
|
|
$to_add = $values;
|
|
|
|
foreach ( $to_add as $add_key => $value ) {
|
|
$remove_keys = array_keys( $to_remove, $value, true );
|
|
|
|
if ( empty( $remove_keys ) ) {
|
|
continue;
|
|
}
|
|
|
|
if ( count( $remove_keys ) > 1 ) {
|
|
// To remove, we need to remove first, then add, so don't touch.
|
|
continue;
|
|
}
|
|
|
|
$remove_key = $remove_keys[0];
|
|
|
|
unset( $to_remove[ $remove_key ] );
|
|
unset( $to_add[ $add_key ] );
|
|
}
|
|
|
|
// `delete_metadata` removes _all_ instances of the value, so only call once.
|
|
$to_remove = array_unique( $to_remove );
|
|
|
|
foreach ( $to_remove as $value ) {
|
|
if ( ! delete_metadata( $meta_type, $object_id, wp_slash( $meta_key ), wp_slash( $value ) ) ) {
|
|
return new WP_Error(
|
|
'rest_meta_database_error',
|
|
__( 'Could not update meta value in database.' ),
|
|
array(
|
|
'key' => $name,
|
|
'status' => WP_Http::INTERNAL_SERVER_ERROR,
|
|
)
|
|
);
|
|
}
|
|
}
|
|
|
|
foreach ( $to_add as $value ) {
|
|
if ( ! add_metadata( $meta_type, $object_id, wp_slash( $meta_key ), wp_slash( $value ) ) ) {
|
|
return new WP_Error(
|
|
'rest_meta_database_error',
|
|
__( 'Could not update meta value in database.' ),
|
|
array(
|
|
'key' => $name,
|
|
'status' => WP_Http::INTERNAL_SERVER_ERROR,
|
|
)
|
|
);
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Updates a meta value for an object.
|
|
*
|
|
* @since 4.7.0
|
|
*
|
|
* @param int $object_id Object ID to update.
|
|
* @param string $meta_key Key for the custom field.
|
|
* @param string $name Name for the field that is exposed in the REST API.
|
|
* @param mixed $value Updated value.
|
|
* @return bool|WP_Error True if the meta field was updated, WP_Error otherwise.
|
|
*/
|
|
protected function update_meta_value( $object_id, $meta_key, $name, $value ) {
|
|
$meta_type = $this->get_meta_type();
|
|
if ( ! current_user_can( "edit_{$meta_type}_meta", $object_id, $meta_key ) ) {
|
|
return new WP_Error(
|
|
'rest_cannot_update',
|
|
/* translators: %s: custom field key */
|
|
sprintf( __( 'Sorry, you are not allowed to edit the %s custom field.' ), $name ),
|
|
array(
|
|
'key' => $name,
|
|
'status' => rest_authorization_required_code(),
|
|
)
|
|
);
|
|
}
|
|
|
|
$meta_key = wp_slash( $meta_key );
|
|
$meta_value = wp_slash( $value );
|
|
|
|
// Do the exact same check for a duplicate value as in update_metadata() to avoid update_metadata() returning false.
|
|
$old_value = get_metadata( $meta_type, $object_id, $meta_key );
|
|
|
|
if ( 1 === count( $old_value ) ) {
|
|
if ( $old_value[0] === $meta_value ) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
if ( ! update_metadata( $meta_type, $object_id, $meta_key, $meta_value ) ) {
|
|
return new WP_Error(
|
|
'rest_meta_database_error',
|
|
__( 'Could not update meta value in database.' ),
|
|
array(
|
|
'key' => $name,
|
|
'status' => WP_Http::INTERNAL_SERVER_ERROR,
|
|
)
|
|
);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Retrieves all the registered meta fields.
|
|
*
|
|
* @since 4.7.0
|
|
*
|
|
* @return array Registered fields.
|
|
*/
|
|
protected function get_registered_fields() {
|
|
$registered = array();
|
|
|
|
$meta_type = $this->get_meta_type();
|
|
$meta_subtype = $this->get_meta_subtype();
|
|
|
|
$meta_keys = get_registered_meta_keys( $meta_type );
|
|
if ( ! empty( $meta_subtype ) ) {
|
|
$meta_keys = array_merge( $meta_keys, get_registered_meta_keys( $meta_type, $meta_subtype ) );
|
|
}
|
|
|
|
foreach ( $meta_keys as $name => $args ) {
|
|
if ( empty( $args['show_in_rest'] ) ) {
|
|
continue;
|
|
}
|
|
|
|
$rest_args = array();
|
|
|
|
if ( is_array( $args['show_in_rest'] ) ) {
|
|
$rest_args = $args['show_in_rest'];
|
|
}
|
|
|
|
$default_args = array(
|
|
'name' => $name,
|
|
'single' => $args['single'],
|
|
'type' => ! empty( $args['type'] ) ? $args['type'] : null,
|
|
'schema' => array(),
|
|
'prepare_callback' => array( $this, 'prepare_value' ),
|
|
);
|
|
|
|
$default_schema = array(
|
|
'type' => $default_args['type'],
|
|
'description' => empty( $args['description'] ) ? '' : $args['description'],
|
|
'default' => isset( $args['default'] ) ? $args['default'] : null,
|
|
);
|
|
|
|
$rest_args = array_merge( $default_args, $rest_args );
|
|
$rest_args['schema'] = array_merge( $default_schema, $rest_args['schema'] );
|
|
|
|
$type = ! empty( $rest_args['type'] ) ? $rest_args['type'] : null;
|
|
$type = ! empty( $rest_args['schema']['type'] ) ? $rest_args['schema']['type'] : $type;
|
|
|
|
if ( ! in_array( $type, array( 'string', 'boolean', 'integer', 'number' ) ) ) {
|
|
continue;
|
|
}
|
|
|
|
if ( empty( $rest_args['single'] ) ) {
|
|
$rest_args['schema']['items'] = array(
|
|
'type' => $rest_args['type'],
|
|
);
|
|
$rest_args['schema']['type'] = 'array';
|
|
}
|
|
|
|
$registered[ $name ] = $rest_args;
|
|
}
|
|
|
|
return $registered;
|
|
}
|
|
|
|
/**
|
|
* Retrieves the object's meta schema, conforming to JSON Schema.
|
|
*
|
|
* @since 4.7.0
|
|
*
|
|
* @return array Field schema data.
|
|
*/
|
|
public function get_field_schema() {
|
|
$fields = $this->get_registered_fields();
|
|
|
|
$schema = array(
|
|
'description' => __( 'Meta fields.' ),
|
|
'type' => 'object',
|
|
'context' => array( 'view', 'edit' ),
|
|
'properties' => array(),
|
|
'arg_options' => array(
|
|
'sanitize_callback' => null,
|
|
'validate_callback' => array( $this, 'check_meta_is_array' ),
|
|
),
|
|
);
|
|
|
|
foreach ( $fields as $args ) {
|
|
$schema['properties'][ $args['name'] ] = $args['schema'];
|
|
}
|
|
|
|
return $schema;
|
|
}
|
|
|
|
/**
|
|
* Prepares a meta value for output.
|
|
*
|
|
* Default preparation for meta fields. Override by passing the
|
|
* `prepare_callback` in your `show_in_rest` options.
|
|
*
|
|
* @since 4.7.0
|
|
*
|
|
* @param mixed $value Meta value from the database.
|
|
* @param WP_REST_Request $request Request object.
|
|
* @param array $args REST-specific options for the meta key.
|
|
* @return mixed Value prepared for output. If a non-JsonSerializable object, null.
|
|
*/
|
|
public static function prepare_value( $value, $request, $args ) {
|
|
$type = $args['schema']['type'];
|
|
|
|
// For multi-value fields, check the item type instead.
|
|
if ( 'array' === $type && ! empty( $args['schema']['items']['type'] ) ) {
|
|
$type = $args['schema']['items']['type'];
|
|
}
|
|
|
|
switch ( $type ) {
|
|
case 'string':
|
|
$value = (string) $value;
|
|
break;
|
|
case 'integer':
|
|
$value = (int) $value;
|
|
break;
|
|
case 'number':
|
|
$value = (float) $value;
|
|
break;
|
|
case 'boolean':
|
|
$value = (bool) $value;
|
|
break;
|
|
}
|
|
|
|
// Don't allow objects to be output.
|
|
if ( is_object( $value ) && ! ( $value instanceof JsonSerializable ) ) {
|
|
return null;
|
|
}
|
|
|
|
return $value;
|
|
}
|
|
|
|
/**
|
|
* Check the 'meta' value of a request is an associative array.
|
|
*
|
|
* @since 4.7.0
|
|
*
|
|
* @param mixed $value The meta value submitted in the request.
|
|
* @param WP_REST_Request $request Full details about the request.
|
|
* @param string $param The parameter name.
|
|
* @return WP_Error|string The meta array, if valid, otherwise an error.
|
|
*/
|
|
public function check_meta_is_array( $value, $request, $param ) {
|
|
if ( ! is_array( $value ) ) {
|
|
return false;
|
|
}
|
|
|
|
return $value;
|
|
}
|
|
}
|