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<?php |
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|
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namespace LearnPress\MCP; |
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|
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use LearnPress\MCP\Auth\AuthContext; |
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use LearnPress\MCP\Concerns\AbilityExecutors; |
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use LearnPress\MCP\Concerns\AbilityHelpers; |
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use LearnPress\MCP\Concerns\AbilitySchemas; |
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use WP_REST_Server; |
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use WP_REST_Request; |
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use WP_REST_Response; |
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use WP_Error; |
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defined( 'ABSPATH' ) || exit; |
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|
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/** |
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* Registers LearnPress abilities for the WordPress Abilities API. |
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* |
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* This class is intentionally small and orchestration-focused: |
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* - bootstrap lifecycle hooks |
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* - register category |
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* - define ability manifests |
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* |
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* Execution logic, schemas, and mapping helpers are split into traits. |
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*/ |
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class Abilities { |
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|
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use AbilitySchemas; |
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use AbilityHelpers; |
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use AbilityExecutors; |
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|
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/** |
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* Abilities API category slug for LearnPress abilities. |
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*/ |
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const CATEGORY = 'learnpress'; |
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|
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/** |
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* Core MCP adapter route provided by WordPress Abilities API. |
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*/ |
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const MCP_ADAPTER_ROUTE = '/mcp/mcp-adapter-default-server'; |
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|
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/** |
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* LearnPress MCP alias route for clients. |
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*/ |
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const MCP_ALIAS_NAMESPACE = 'lp/v1'; |
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const MCP_ALIAS_ROUTE = '/mcp'; |
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/** |
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* Guard flag to avoid registering hooks more than once. |
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* |
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* @var bool |
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*/ |
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protected static $initialized = false; |
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|
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/** |
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* Initialize ability registration hooks when Abilities API exists. |
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* |
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* @return void |
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*/ |
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public static function init(): void { |
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if ( self::$initialized || ! function_exists( 'wp_register_ability' ) ) { |
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return; |
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} |
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|
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add_action( 'wp_abilities_api_categories_init', array( __CLASS__, 'register_category' ) ); |
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add_action( 'wp_abilities_api_init', array( __CLASS__, 'register_abilities' ) ); |
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add_action( 'rest_api_init', array( __CLASS__, 'register_mcp_alias_route' ), 20 ); |
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self::$initialized = true; |
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} |
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|
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/** |
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* Register LearnPress MCP alias endpoint. |
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* |
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* Proxy requests to the default MCP adapter server so clients can use: |
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* /wp-json/lp/v1/mcp |
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* |
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* @return void |
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*/ |
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public static function register_mcp_alias_route(): void { |
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|
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register_rest_route( |
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self::MCP_ALIAS_NAMESPACE, |
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self::MCP_ALIAS_ROUTE, |
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array( |
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'methods' => WP_REST_Server::ALLMETHODS, |
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'callback' => array( __CLASS__, 'proxy_mcp_adapter_request' ), |
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'permission_callback' => '__return_true', |
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) |
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); |
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} |
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|
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/** |
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* Proxy LearnPress MCP alias request to the core MCP adapter route. |
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* |
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* @param WP_REST_Request $request |
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* |
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* @return WP_REST_Response|WP_Error |
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*/ |
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public static function proxy_mcp_adapter_request( WP_REST_Request $request ) { |
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|
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$proxy_request = new WP_REST_Request( $request->get_method(), self::MCP_ADAPTER_ROUTE ); |
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$proxy_request->set_headers( $request->get_headers() ); |
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$proxy_request->set_query_params( $request->get_query_params() ); |
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$proxy_request->set_body_params( $request->get_body_params() ); |
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$proxy_request->set_file_params( $request->get_file_params() ); |
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$proxy_request->set_body( $request->get_body() ); |
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|
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return rest_do_request( $proxy_request ); |
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} |
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/** |
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* Register the LearnPress ability category. |
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* |
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* @return void |
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*/ |
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public static function register_category(): void { |
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wp_register_ability_category( |
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self::CATEGORY, |
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array( |
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'label' => __( 'LearnPress LMS', 'learnpress' ), |
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'description' => __( 'Read-only abilities for LearnPress LMS data.', 'learnpress' ), |
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) |
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); |
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} |
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|
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/** |
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* Register all Phase 1 (read-only) LearnPress abilities. |
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* |
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* @return void |
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*/ |
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public static function register_abilities(): void { |
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self::reg( |
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'learnpress/get-courses', |
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__( 'Get Courses', 'learnpress' ), |
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__( 'List courses with optional filters and pagination.', 'learnpress' ), |
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self::schema_get_courses_input(), |
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self::schema_list_output( self::schema_course_summary() ), |
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array( __CLASS__, 'execute_get_courses' ) |
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); |
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|
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self::reg( |
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'learnpress/get-course-details', |
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__( 'Get Course Details', 'learnpress' ), |
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__( 'Get details and curriculum summary for a course.', 'learnpress' ), |
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self::schema_required_id( 'course_id' ), |
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self::schema_course_detail_output(), |
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array( __CLASS__, 'execute_get_course_details' ) |
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); |
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|
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self::reg( |
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'learnpress/list-lessons', |
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__( 'List Lessons', 'learnpress' ), |
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__( 'List lessons in a course with optional filters.', 'learnpress' ), |
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self::schema_list_lessons_input(), |
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self::schema_list_output( self::schema_lesson_summary() ), |
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array( __CLASS__, 'execute_list_lessons' ) |
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); |
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|
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self::reg( |
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'learnpress/get-lesson-details', |
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__( 'Get Lesson Details', 'learnpress' ), |
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__( 'Get lesson details including content, video intro, and materials.', 'learnpress' ), |
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self::schema_required_id( 'lesson_id' ), |
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self::schema_lesson_detail_output(), |
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array( __CLASS__, 'execute_get_lesson_details' ) |
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); |
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|
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self::reg( |
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'learnpress/list-quizzes', |
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__( 'List Quizzes', 'learnpress' ), |
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__( 'List quizzes in a course with pagination.', 'learnpress' ), |
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self::schema_list_quizzes_input(), |
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self::schema_list_output( self::schema_quiz_summary() ), |
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array( __CLASS__, 'execute_list_quizzes' ) |
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); |
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|
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self::reg( |
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'learnpress/get-quiz-details', |
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__( 'Get Quiz Details', 'learnpress' ), |
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__( 'Get quiz details including duration, passing grade, and question count.', 'learnpress' ), |
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self::schema_required_id( 'quiz_id' ), |
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self::schema_quiz_detail_output(), |
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array( __CLASS__, 'execute_get_quiz_details' ) |
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); |
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|
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self::reg( |
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'learnpress/get-student-progress', |
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__( 'Get Student Progress', 'learnpress' ), |
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__( 'Get user progress and results for a course enrollment.', 'learnpress' ), |
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self::schema_progress_input(), |
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self::schema_object_output( 'progress' ), |
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array( __CLASS__, 'execute_get_student_progress' ) |
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); |
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|
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self::reg( |
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'learnpress/get-enrollments', |
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__( 'Get Enrollments', 'learnpress' ), |
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__( 'List course enrollments with optional filters and pagination.', 'learnpress' ), |
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self::schema_get_enrollments_input(), |
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self::schema_list_output( array( 'type' => 'object' ) ), |
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array( __CLASS__, 'execute_get_enrollments' ) |
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); |
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} |
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|
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/** |
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* Shared permission callback for LearnPress MCP abilities. |
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* |
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* @param string $ability_name Ability ID. |
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* @param mixed $input Ability input. |
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* |
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* @return bool|WP_Error |
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*/ |
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public static function permission_callback( string $ability_name, $input = null ) { |
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|
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if ( ! AuthContext::is_api_key_auth() ) { |
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return self::error_missing_auth(); |
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} |
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|
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$current_user_id = get_current_user_id(); |
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$base_capability = self::get_base_capability( $ability_name, $input ); |
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|
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if ( $current_user_id <= 0 ) { |
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return self::error_missing_auth(); |
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} |
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|
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if ( ! current_user_can( $base_capability ) ) { |
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return self::error_missing_base_capability( $base_capability ); |
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} |
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|
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$required_scope = self::get_required_scope( $ability_name, $input ); |
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$granted_scope = AuthContext::get_permissions(); |
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|
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if ( ! self::scope_allows( $granted_scope, $required_scope ) ) { |
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return self::error_insufficient_scope( $required_scope, $granted_scope ); |
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} |
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|
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return true; |
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} |
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/** |
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* Register a single ability with common metadata annotations. |
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* |
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* @param string $name Ability name. |
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* @param string $label Human-readable label. |
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* @param string $description Description for clients. |
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* @param array $input_schema Input JSON schema. |
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* @param array $output_schema Output JSON schema. |
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* @param callable $execute_callback Callback that executes the ability. |
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* |
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* @return void |
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*/ |
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protected static function reg( |
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string $name, |
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string $label, |
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string $description, |
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array $input_schema, |
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array $output_schema, |
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$execute_callback |
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): void { |
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$permission_callback = static function ( $input = null ) use ( $name ) { |
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return self::permission_callback( $name, $input ); |
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}; |
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|
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wp_register_ability( |
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$name, |
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array( |
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'label' => $label, |
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'description' => $description, |
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'category' => self::CATEGORY, |
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'execute_callback' => $execute_callback, |
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'permission_callback' => $permission_callback, |
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'input_schema' => $input_schema, |
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'output_schema' => $output_schema, |
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'meta' => array( |
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'annotations' => array( |
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'readonly' => true, |
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'destructive' => false, |
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'idempotent' => true, |
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), |
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'mcp' => array( |
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'public' => true, |
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'type' => 'tool', |
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'required_scope' => self::get_required_scope( $name ), |
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), |
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'show_in_rest' => true, |
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), |
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) |
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); |
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} |
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|
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/** |
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* Resolve base capability required for ability execution. |
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* |
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* @param string $ability_name Ability ID. |
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* @param mixed $input Ability input payload. |
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* |
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* @return string |
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*/ |
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protected static function get_base_capability( string $ability_name, $input = null ): string { |
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|
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$capability = apply_filters( 'learn-press/mcp/api-keys/base-capability', 'manage_options', $ability_name, $input ); |
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|
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return is_string( $capability ) && '' !== $capability ? $capability : 'manage_options'; |
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} |
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|
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/** |
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* Resolve required key scope for an ability. |
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* |
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* @param string $ability_name Ability ID. |
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* @param mixed $input Ability input payload. |
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* |
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* @return string |
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*/ |
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protected static function get_required_scope( string $ability_name, $input = null ): string { |
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|
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$default_scopes = array( |
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'learnpress/get-courses' => 'read', |
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'learnpress/get-course-details' => 'read', |
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'learnpress/list-lessons' => 'read', |
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'learnpress/get-lesson-details' => 'read', |
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'learnpress/list-quizzes' => 'read', |
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'learnpress/get-quiz-details' => 'read', |
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'learnpress/get-student-progress' => 'read', |
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'learnpress/get-enrollments' => 'read', |
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); |
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|
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$scope = $default_scopes[ $ability_name ] ?? 'read'; |
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$scope = apply_filters( 'learn-press/mcp/ability-required-scope', $scope, $ability_name, $input ); |
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|
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return in_array( $scope, array( 'read', 'write', 'read_write' ), true ) ? $scope : 'read'; |
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} |
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|
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/** |
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* Check if granted key scope satisfies required scope. |
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* |
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* @param string $granted_scope Scope attached to current API key. |
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* @param string $required_scope Scope required by the ability. |
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* |
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* @return bool |
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*/ |
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protected static function scope_allows( string $granted_scope, string $required_scope ): bool { |
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|
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if ( 'read_write' === $granted_scope ) { |
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return true; |
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} |
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|
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return $granted_scope === $required_scope; |
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} |
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|
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/** |
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* Error for missing/invalid authentication. |
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* |
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* @param string $message Optional custom error message. |
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* |
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* @return WP_Error |
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*/ |
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protected static function error_missing_auth( string $message = '' ): WP_Error { |
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|
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if ( '' === $message ) { |
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$message = __( 'Missing or invalid MCP authentication.', 'learnpress' ); |
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} |
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|
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return new WP_Error( |
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'learnpress_mcp_missing_auth', |
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$message, |
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array( 'status' => 401 ) |
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); |
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} |
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|
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/** |
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* Error for base capability failure. |
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* |
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* @param string $capability Required capability name. |
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* |
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* @return WP_Error |
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*/ |
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protected static function error_missing_base_capability( string $capability ): WP_Error { |
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|
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return new WP_Error( |
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'learnpress_mcp_missing_base_capability', |
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sprintf( |
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/* translators: %s: capability. */ |
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__( 'Current user does not have required base capability: %s.', 'learnpress' ), |
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$capability |
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), |
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array( 'status' => 403 ) |
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); |
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} |
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|
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/** |
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* Error for scope mismatch. |
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* |
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* @param string $required_scope Required scope for the ability. |
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* @param string $granted_scope Scope granted by authenticated API key. |
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* |
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* @return WP_Error |
| 393 |
*/ |
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protected static function error_insufficient_scope( string $required_scope, string $granted_scope ): WP_Error { |
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|
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return new WP_Error( |
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'learnpress_mcp_insufficient_scope', |
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sprintf( |
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/* translators: 1: required scope, 2: granted scope. */ |
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__( 'API key scope is insufficient. Required: %1$s. Granted: %2$s.', 'learnpress' ), |
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$required_scope, |
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$granted_scope |
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), |
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array( 'status' => 403 ) |
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); |
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} |
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} |
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|
