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<?php |
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namespace PhpJsonRpc\Client; |
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use PhpJsonRpc\Common\Chain\Chain; |
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use PhpJsonRpc\Common\Chain\Container; |
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use PhpJsonRpc\Core\Result\AbstractResult; |
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use PhpJsonRpc\Core\Result\ResultError; |
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use PhpJsonRpc\Core\Result\ResultUnit; |
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use PhpJsonRpc\Core\ResultSpecifier; |
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use PhpJsonRpc\Error\ServerErrorException; |
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use PhpJsonRpc\Error\ParseErrorException; |
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use PhpJsonRpc\Error\InvalidResponseException; |
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class ResponseParser |
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{ |
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/** |
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* @var Chain |
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*/ |
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private $preParse; |
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/** |
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* @var Chain |
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*/ |
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private $postParse; |
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/** |
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* ResponseParser constructor. |
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*/ |
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public function __construct() |
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{ |
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$this->preParse = Chain::createBase(); |
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$this->postParse = Chain::createBase(); |
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} |
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/** |
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* @param string $payload |
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* |
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* @return ResultSpecifier |
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*/ |
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public function parse(string $payload): ResultSpecifier |
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{ |
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$data = @json_decode($payload, true); |
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if (!is_array($data)) { |
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throw new ParseErrorException(); |
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} |
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$units = []; |
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if ($this->isSingleResponse($data)) { |
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$units[] = $this->decodeResult($data); |
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return new ResultSpecifier($units, true); |
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} |
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/** @var array $data */ |
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foreach ($data as $response) { |
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$units[] = $this->decodeResult($response); |
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} |
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return new ResultSpecifier($units, false); |
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} |
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/** |
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* @return Chain |
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*/ |
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public function onPreParse(): Chain |
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{ |
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return $this->preParse; |
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} |
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/** |
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* @return Chain |
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*/ |
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public function onPostParse(): Chain |
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{ |
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return $this->postParse; |
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} |
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/** |
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* @param array $record |
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* |
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* @return AbstractResult |
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*/ |
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private function decodeResult(array $record): AbstractResult |
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{ |
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$record = $this->preParse($record); |
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if ($this->isValidResult($record)) { |
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$unit = new ResultUnit($record['id'], $record['result']); |
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} elseif ($this->isValidError($record)) { |
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$unit = new ResultError($record['id'], new ServerErrorException($record['error']['message'], $record['error']['code'])); |
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} else { |
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throw new InvalidResponseException(); |
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} |
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return $this->postParse($unit); |
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} |
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/** |
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* @param array $response |
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* |
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* @return bool |
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*/ |
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private function isSingleResponse(array $response): bool |
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{ |
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return array_keys($response) !== range(0, count($response) - 1); |
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} |
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/** |
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* @param array $payload |
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* |
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* @return bool |
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*/ |
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private function isValidResult($payload): bool |
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{ |
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if (!is_array($payload)) { |
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return false; |
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} |
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$headerValid = array_key_exists('jsonrpc', $payload) && $payload['jsonrpc'] === '2.0'; |
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$resultValid = array_key_exists('result', $payload); |
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$idValid = array_key_exists('id', $payload); |
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return $headerValid && $resultValid && $idValid; |
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} |
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/** |
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* @param array $payload |
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* |
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* @return bool |
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*/ |
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private function isValidError($payload): bool |
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{ |
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if (!is_array($payload)) { |
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return false; |
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} |
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$headerValid = array_key_exists('jsonrpc', $payload) && $payload['jsonrpc'] === '2.0'; |
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$errorValid = array_key_exists('error', $payload) && is_array($payload['error']) |
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&& array_key_exists('code', $payload['error']) && is_int($payload['error']['code']) |
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&& array_key_exists('message', $payload['error']) && is_string($payload['error']['message']); |
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$idValid = array_key_exists('id', $payload); |
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return $headerValid && $errorValid && $idValid; |
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} |
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/** |
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* @param array $data |
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* |
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* @return array |
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*/ |
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private function preParse(array $data): array |
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{ |
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return $this->preParse->handle(new Container($this, $data))->last(); |
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} |
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/** |
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* @param AbstractResult $result |
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* |
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* @return AbstractResult |
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*/ |
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private function postParse(AbstractResult $result): AbstractResult |
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{ |
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return $this->postParse->handle(new Container($this, $result))->last(); |
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} |
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} |
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vaderangry /
PhpJsonRpc
