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<?php |
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|
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declare(strict_types=1); |
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|
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namespace WP\McpSchema\Common; |
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|
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/** |
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* MCP Protocol Constants. |
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* |
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* Contains all exported constants from the MCP TypeScript schema including: |
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* - Protocol version constants |
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* - JSON-RPC version |
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* - Standard JSON-RPC error codes |
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* - MCP-specific error codes |
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* |
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* @since 2025-11-25 |
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* |
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* @mcp-version 2025-11-25 |
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*/ |
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final class McpConstants |
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{ |
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// Protocol constants |
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public const LATEST_PROTOCOL_VERSION = '2025-11-25'; |
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public const JSONRPC_VERSION = '2.0'; |
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|
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// Error codes |
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public const PARSE_ERROR = -32700; |
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public const INVALID_REQUEST = -32600; |
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public const METHOD_NOT_FOUND = -32601; |
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public const INVALID_PARAMS = -32602; |
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public const INTERNAL_ERROR = -32603; |
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public const URL_ELICITATION_REQUIRED = -32042; |
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|
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/** |
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* Returns all error codes defined in this class. |
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* |
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* @return int[] |
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*/ |
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public static function getErrorCodes(): array |
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{ |
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return [ |
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self::PARSE_ERROR, |
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self::INVALID_REQUEST, |
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self::METHOD_NOT_FOUND, |
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self::INVALID_PARAMS, |
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self::INTERNAL_ERROR, |
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self::URL_ELICITATION_REQUIRED, |
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]; |
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} |
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|
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/** |
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* Returns error code names mapped to their values. |
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* |
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* @return array<string, int> |
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*/ |
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public static function getErrorCodeNames(): array |
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{ |
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return [ |
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'PARSE_ERROR' => self::PARSE_ERROR, |
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'INVALID_REQUEST' => self::INVALID_REQUEST, |
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'METHOD_NOT_FOUND' => self::METHOD_NOT_FOUND, |
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'INVALID_PARAMS' => self::INVALID_PARAMS, |
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'INTERNAL_ERROR' => self::INTERNAL_ERROR, |
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'URL_ELICITATION_REQUIRED' => self::URL_ELICITATION_REQUIRED, |
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]; |
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} |
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|
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/** |
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* Checks if the given error code is valid. |
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* |
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* @param int $code |
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* @return bool |
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*/ |
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public static function isValidErrorCode(int $code): bool |
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{ |
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return in_array($code, self::getErrorCodes(), true); |
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} |
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|
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/** |
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* Gets the constant name for an error code. |
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* |
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* @param int $code |
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* @return string|null The constant name, or null if not found |
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*/ |
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public static function getErrorCodeName(int $code): ?string |
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{ |
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$flipped = array_flip(self::getErrorCodeNames()); |
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return $flipped[$code] ?? null; |
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} |
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|
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/** |
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* Checks if an error code is a standard JSON-RPC error. |
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* |
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* Standard JSON-RPC errors are in the range -32700 to -32600. |
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* |
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* @param int $code |
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* @return bool |
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*/ |
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public static function isStandardJsonRpcError(int $code): bool |
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{ |
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return $code >= -32700 && $code <= -32600; |
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} |
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} |
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|
