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<?php |
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|
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namespace FluentCart\App\Modules\MCP; |
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|
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use FluentCart\App\Modules\MCP\Tools\ContextTools; |
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use FluentCart\App\Modules\MCP\Tools\OrderTools; |
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use FluentCart\App\Modules\MCP\Tools\CustomerTools; |
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use FluentCart\App\Modules\MCP\Tools\ProductTools; |
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use FluentCart\App\Modules\MCP\Tools\SubscriptionTools; |
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use FluentCart\App\Modules\MCP\Tools\CouponTools; |
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use FluentCart\App\Modules\MCP\Tools\LabelTools; |
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use FluentCart\App\Modules\MCP\Tools\ReportTools; |
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|
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/** |
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* Single source of truth for every FluentCart MCP ability. |
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* |
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* Each tool class owns its own `definitions()` slice (schema next to code); |
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* this class merges them, wraps every execute_callback so unhandled exceptions |
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* become structured WP_Errors the agent can read (instead of the adapter's |
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* generic "Tool execution failed"), and registers each as a WP ability. |
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* |
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* Pro tools are NOT listed here — FluentCart Pro pushes its abilities via the |
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* `fluent_cart/mcp_loaded` action + `fluent_cart/mcp_ability_names` filter. |
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*/ |
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class AbilitiesRegistrar |
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{ |
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/** Tool classes that expose a static definitions() method. */ |
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private static function toolClasses() |
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{ |
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return [ |
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ContextTools::class, |
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OrderTools::class, |
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CustomerTools::class, |
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ProductTools::class, |
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SubscriptionTools::class, |
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CouponTools::class, |
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LabelTools::class, |
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ReportTools::class, |
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]; |
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} |
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|
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public static function getDefinitions() |
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{ |
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$defs = []; |
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|
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foreach (self::toolClasses() as $class) { |
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if (class_exists($class) && method_exists($class, 'definitions')) { |
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$defs = array_merge($defs, (array) $class::definitions()); |
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} |
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} |
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|
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return $defs; |
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} |
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|
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public static function register() |
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{ |
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foreach (self::getDefinitions() as $name => $definition) { |
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$args = [ |
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'label' => $definition['label'], |
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'description' => $definition['description'], |
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'category' => 'fluent-cart', |
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'execute_callback' => self::wrapExecuteCallback($name, $definition['execute_callback']), |
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'permission_callback' => $definition['permission_callback'], |
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'meta' => [ |
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'show_in_rest' => true, |
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'mcp' => ['public' => true], |
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], |
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]; |
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|
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if (!empty($definition['input_schema'])) { |
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$args['input_schema'] = $definition['input_schema']; |
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} |
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|
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if (!empty($definition['output_schema'])) { |
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$args['output_schema'] = $definition['output_schema']; |
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} |
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|
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if (!empty($definition['annotations'])) { |
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// snake_case keys; the adapter's McpAnnotationMapper translates |
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// readonly -> readOnlyHint, destructive -> destructiveHint, etc. |
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$args['meta']['annotations'] = $definition['annotations']; |
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} |
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|
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wp_register_ability($name, $args); |
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} |
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} |
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|
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/** |
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* Convert any unhandled \Throwable from a tool into a structured WP_Error |
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* carrying the real message (and, under WP_DEBUG, the file + a short trace). |
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* Without this the agent only sees the adapter's generic failure surface and |
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* retries blindly against tools that may have partially succeeded. |
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*/ |
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private static function wrapExecuteCallback($toolName, $callback) |
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{ |
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return function ($params) use ($toolName, $callback) { |
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try { |
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return call_user_func($callback, $params); |
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} catch (\Throwable $e) { |
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/** |
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* Fires when an MCP tool throws. Lets sites log/alert before the |
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* structured error reaches the agent. |
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* |
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* @since 1.0.0 |
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* |
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* @param array $context { exception: \Throwable, tool: string, params: mixed } |
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*/ |
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do_action('fluent_cart/mcp_tool_exception', [ |
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'exception' => $e, |
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'tool' => $toolName, |
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'params' => $params, |
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]); |
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|
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// Unexpected exceptions are treated as transient (retryable): |
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// the agent may legitimately retry once. |
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$details = ['tool' => $toolName, 'exception' => get_class($e), 'retryable' => true]; |
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|
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// File/line/trace help an operator debug, but this payload is |
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// forwarded to the remote agent/LLM — raw paths would leak the |
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// server's filesystem layout. So it's off by default and opt-in |
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// only; full detail is always available server-side via the |
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// action above. When enabled, the file is reduced to a basename. |
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$exposeDetails = apply_filters('fluent_cart/mcp_expose_error_details', false); |
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if ($exposeDetails) { |
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$details['file'] = basename($e->getFile()) . ':' . $e->getLine(); |
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$details['trace'] = array_slice(explode("\n", $e->getTraceAsString()), 0, 5); |
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} |
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|
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return \FluentCart\App\Modules\MCP\Support\MCPHelper::error('tool_failed', $e->getMessage(), $details); |
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} |
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}; |
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} |
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} |
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|
