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ClientState.php
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136 lines (111 loc) · 3.5 KB
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<?php
/*
* This file is part of the official PHP MCP SDK.
*
* A collaboration between Symfony and the PHP Foundation.
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Mcp\Client\State;
use Mcp\Schema\Implementation;
use Mcp\Schema\JsonRpc\Error;
use Mcp\Schema\JsonRpc\Response;
/**
* In-memory client state implementation.
*
* Stores ephemeral runtime state for the client's connection to a server.
* This includes pending requests, responses, progress updates, and
* negotiated parameters from initialization.
*
* @author Kyrian Obikwelu <koshnawaza@gmail.com>
*/
class ClientState implements ClientStateInterface
{
private int $requestIdCounter = 1;
private bool $initialized = false;
private ?Implementation $serverInfo = null;
private ?string $instructions = null;
/** @var array<int|string, array{request_id: int|string, timestamp: int, timeout: int}> */
private array $pendingRequests = [];
/** @var array<int|string, array<string, mixed>> */
private array $responses = [];
/** @var array<int, array{token: string, progress: float, total: ?float, message: ?string}> */
private array $progressUpdates = [];
public function nextRequestId(): int
{
return $this->requestIdCounter++;
}
public function addPendingRequest(int|string $requestId, int $timeout): void
{
$this->pendingRequests[$requestId] = [
'request_id' => $requestId,
'timestamp' => time(),
'timeout' => $timeout,
];
}
public function removePendingRequest(int|string $requestId): void
{
unset($this->pendingRequests[$requestId]);
}
public function getPendingRequests(): array
{
return $this->pendingRequests;
}
public function storeResponse(int|string $requestId, array $responseData): void
{
$this->responses[$requestId] = $responseData;
}
public function consumeResponse(int|string $requestId): Response|Error|null
{
if (!isset($this->responses[$requestId])) {
return null;
}
$data = $this->responses[$requestId];
unset($this->responses[$requestId]);
$this->removePendingRequest($requestId);
if (isset($data['error'])) {
return Error::fromArray($data);
}
return Response::fromArray($data);
}
public function setInitialized(bool $initialized): void
{
$this->initialized = $initialized;
}
public function isInitialized(): bool
{
return $this->initialized;
}
public function setServerInfo(Implementation $serverInfo): void
{
$this->serverInfo = $serverInfo;
}
public function getServerInfo(): ?Implementation
{
return $this->serverInfo;
}
public function setInstructions(?string $instructions): void
{
$this->instructions = $instructions;
}
public function getInstructions(): ?string
{
return $this->instructions;
}
public function storeProgress(string $token, float $progress, ?float $total, ?string $message): void
{
$this->progressUpdates[] = [
'token' => $token,
'progress' => $progress,
'total' => $total,
'message' => $message,
];
}
public function consumeProgressUpdates(): array
{
$updates = $this->progressUpdates;
$this->progressUpdates = [];
return $updates;
}
}