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<?php
namespace Wikimedia\Message;
use Wikimedia\JsonCodec\JsonCodecableTrait;
/**
* Value object representing a message for i18n with alternative
* machine-readable data.
*
* This augments a MessageValue with an additional machine-readable code and
* structured data. The intended use is to facilitate error reporting in APIs.
*
* For example, a MessageValue reporting an "integer out of range" error might
* use one of three message keys, depending on whether there is a minimum, a
* maximum, or both. But an API would likely want to use one code for all three
* cases, and would likely want the endpoints represented along the lines of
* `[ 'min' => 1, 'max' => 10 ]` rather than
* `[ 0 => new ScalarParam( ParamType::TEXT, 1 ), 1 => new ScalarParam( ParamType::TEXT, 10 ) ]`.
*
* DataMessageValues are pure value objects and are newable and (de)serializable.
*
* @newable
*/
class DataMessageValue extends MessageValue {
use JsonCodecableTrait;
private string $code;
private ?array $data;
/**
* @stable to call
*
* @param string $key
* @param (MessageParam|MessageValue|string|int|float)[] $params
* @param string|null $code String representing the concept behind
* this message.
* @param array|null $data Structured data representing the concept
* behind this message.
*/
public function __construct( string $key, array $params = [], ?string $code = null, ?array $data = null ) {
parent::__construct( $key, $params );
$this->code = $code ?? $key;
$this->data = $data;
}
/**
* Static constructor for easier chaining of `->params()` methods
*
* @param string $key
* @param (MessageParam|MessageValue|string|int|float)[] $params
* @param string|null $code
* @param array|null $data
*
* @return DataMessageValue
*/
public static function new(
string $key,
array $params = [],
?string $code = null,
?array $data = null
): DataMessageValue {
return new DataMessageValue( $key, $params, $code, $data );
}
/**
* Get the message code
*/
public function getCode(): string {
return $this->code;
}
/**
* Get the message's structured data
* @return array|null
*/
public function getData(): ?array {
return $this->data;
}
public function dump(): string {
$contents = '';
if ( $this->getParams() ) {
$contents = '<params>';
foreach ( $this->getParams() as $param ) {
$contents .= $param->dump();
}
$contents .= '</params>';
}
if ( $this->data !== null ) {
$contents .= '<data>' . htmlspecialchars( json_encode( $this->data ), ENT_NOQUOTES ) . '</data>';
}
return '<datamessage key="' . htmlspecialchars( $this->getKey() ) . '"'
. ' code="' . htmlspecialchars( $this->code ) . '">'
. $contents
. '</datamessage>';
}
public function toJsonArray(): array {
// WARNING: When changing how this class is serialized, follow the instructions
// at <https://www.mediawiki.org/wiki/Manual:Parser_cache/Serialization_compatibility>!
return parent::toJsonArray() + [
'code' => $this->code,
'data' => $this->data,
];
}
public static function newFromJsonArray( array $json ): DataMessageValue {
// WARNING: When changing how this class is serialized, follow the instructions
// at <https://www.mediawiki.org/wiki/Manual:Parser_cache/Serialization_compatibility>!
return new self( $json['key'], $json['params'], $json['code'], $json['data'] );
}
}