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<?php |
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/** |
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* Helper trait for MCP handlers. |
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* |
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* @package McpAdapter |
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*/ |
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|
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declare( strict_types=1 ); |
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|
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namespace WP\MCP\Handlers; |
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|
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use WP\MCP\Infrastructure\ErrorHandling\Contracts\McpErrorHandlerInterface; |
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|
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/** |
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* Provides common helper methods for MCP handlers. |
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*/ |
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trait HandlerHelperTrait { |
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/** |
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* Extracts parameters from a request message. |
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* |
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* Handles both direct params and nested params structure for backward compatibility. |
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* This normalizes the dual parameter patterns found throughout handlers. |
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* |
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* @param array $data Request data that may have params at root or nested. |
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* |
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* @return array Extracted parameters. |
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*/ |
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protected function extract_params( array $data ): array { |
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return $data['params'] ?? $data; |
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} |
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|
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/** |
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* Validate that a filtered list value is still an array. |
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* |
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* If a filter callback returns a non-array value, logs a warning |
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* and falls back to the original unfiltered array to prevent |
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* downstream type errors. |
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* |
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* @since 0.5.0 |
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* |
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* @param mixed $filtered The value returned by apply_filters. |
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* @param array $original The original unfiltered array. |
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* @param string $filter_name The filter hook name (for logging). |
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* @param \WP\MCP\Infrastructure\ErrorHandling\Contracts\McpErrorHandlerInterface $error_handler The error handler for logging. |
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* |
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* @return array The validated array (filtered if valid, original if not). |
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*/ |
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protected function validate_filtered_list( $filtered, array $original, string $filter_name, McpErrorHandlerInterface $error_handler ): array { |
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if ( is_array( $filtered ) ) { |
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return $filtered; |
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} |
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|
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$error_handler->log( |
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'Filter returned non-array value, falling back to original list', |
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array( |
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'filter' => $filter_name, |
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'returned_type' => gettype( $filtered ), |
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), |
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'warning' |
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); |
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|
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return $original; |
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} |
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} |
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|
