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<?php |
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|
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namespace Better_Payment\Lite\API; |
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|
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use Better_Payment\Lite\AI\AIManager; |
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use Better_Payment\Lite\AI\ProviderRegistry; |
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use Better_Payment\Lite\AI\Operations\OperationRegistry; |
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use Better_Payment\Lite\AI\Services\BriefWriter; |
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use Better_Payment\Lite\AI\Services\CampaignAnalyzer; |
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use Better_Payment\Lite\AI\Services\CampaignEditor; |
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use Better_Payment\Lite\AI\Services\CampaignGenerator; |
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use Better_Payment\Lite\AI\Services\ConversationManager; |
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use Better_Payment\Lite\AI\Services\ImageGenerator; |
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use Better_Payment\Lite\AI\Services\UserFieldGuard; |
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use WP_REST_Controller; |
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use WP_REST_Request; |
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use WP_REST_Response; |
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use WP_REST_Server; |
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|
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if ( ! defined( 'ABSPATH' ) ) { |
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exit; |
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} |
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|
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/** |
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* REST API routes for the AI Campaign Assistant. |
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* |
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* Namespace: better-payment/v1. Mirrors CampaignAPI: admin-only |
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* (`manage_options`) with X-WP-Nonce verification on writes. The builder already |
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* configures apiFetch with the wp_rest nonce, so no new client plumbing. |
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* |
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* @see \Better_Payment\Lite\AI\Services\AIService Turn orchestration. |
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*/ |
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class AIAPI extends WP_REST_Controller { |
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|
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protected $namespace = 'better-payment/v1'; |
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|
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public function __construct() { |
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add_action( 'rest_api_init', [ $this, 'register_routes' ] ); |
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} |
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|
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public function register_routes() { |
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register_rest_route( $this->namespace, '/ai/chat', [ |
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[ |
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'methods' => WP_REST_Server::CREATABLE, |
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'callback' => [ $this, 'chat' ], |
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'permission_callback' => [ $this, 'check_admin_permissions' ], |
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], |
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] ); |
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|
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register_rest_route( $this->namespace, '/ai/generate', [ |
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[ |
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'methods' => WP_REST_Server::CREATABLE, |
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'callback' => [ $this, 'generate' ], |
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'permission_callback' => [ $this, 'check_admin_permissions' ], |
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], |
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] ); |
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|
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register_rest_route( $this->namespace, '/ai/analyze', [ |
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[ |
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'methods' => WP_REST_Server::CREATABLE, |
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'callback' => [ $this, 'analyze' ], |
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'permission_callback' => [ $this, 'check_admin_permissions' ], |
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], |
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] ); |
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|
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register_rest_route( $this->namespace, '/ai/brief', [ |
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[ |
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'methods' => WP_REST_Server::CREATABLE, |
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'callback' => [ $this, 'refine_brief' ], |
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'permission_callback' => [ $this, 'check_admin_permissions' ], |
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], |
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] ); |
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|
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register_rest_route( $this->namespace, '/ai/image', [ |
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[ |
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'methods' => WP_REST_Server::CREATABLE, |
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'callback' => [ $this, 'image' ], |
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'permission_callback' => [ $this, 'check_admin_permissions' ], |
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], |
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] ); |
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|
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register_rest_route( $this->namespace, '/ai/conversations/(?P<id>[\d]+)', [ |
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[ |
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'methods' => WP_REST_Server::READABLE, |
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'callback' => [ $this, 'get_conversation' ], |
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'permission_callback' => [ $this, 'check_admin_permissions' ], |
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'args' => [ 'id' => [ 'type' => 'integer' ] ], |
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], |
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[ |
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'methods' => WP_REST_Server::CREATABLE, |
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'callback' => [ $this, 'save_conversation' ], |
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'permission_callback' => [ $this, 'check_admin_permissions' ], |
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'args' => [ 'id' => [ 'type' => 'integer' ] ], |
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], |
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[ |
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'methods' => WP_REST_Server::DELETABLE, |
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'callback' => [ $this, 'clear_conversation' ], |
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'permission_callback' => [ $this, 'check_admin_permissions' ], |
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'args' => [ 'id' => [ 'type' => 'integer' ] ], |
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], |
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] ); |
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|
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register_rest_route( $this->namespace, '/ai/config', [ |
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[ |
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'methods' => WP_REST_Server::READABLE, |
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'callback' => [ $this, 'get_config' ], |
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'permission_callback' => [ $this, 'check_admin_permissions' ], |
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], |
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] ); |
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} |
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|
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// ------------------------------------------------------------------ handlers |
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|
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public function chat( WP_REST_Request $request ): WP_REST_Response { |
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$nonce = $this->nonce_guard( $request ); |
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if ( null !== $nonce ) { |
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return $nonce; |
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} |
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$disabled = $this->enabled_guard(); |
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if ( null !== $disabled ) { |
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return $disabled; |
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} |
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|
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$campaign_id = (int) $request->get_param( 'campaign_id' ); |
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$message = trim( (string) $request->get_param( 'message' ) ); |
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if ( '' === $message ) { |
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return new WP_REST_Response( [ 'message' => __( 'Message is required.', 'better-payment' ) ], 400 ); |
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} |
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|
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$context = $this->read_context( $request ); |
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$history = ConversationManager::sanitize( (array) $request->get_param( 'history' ) ); |
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|
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// Sent by the builder's per-element "AI quick edit" buttons. Only the id |
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// travels — CampaignEditor reads the type and current settings back out of |
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// the trusted context layout. |
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$target_element_id = sanitize_text_field( (string) $request->get_param( 'target_element_id' ) ); |
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|
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$result = CampaignEditor::edit( $message, $context, $history, $target_element_id ); |
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if ( is_wp_error( $result ) ) { |
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return $this->error_response( $result ); |
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} |
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|
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// Persist the turn when we have a saved campaign to attach it to. |
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if ( $campaign_id > 0 ) { |
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ConversationManager::append( $campaign_id, $message, $result['assistant_message'] ); |
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} |
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return new WP_REST_Response( $result, 200 ); |
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} |
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|
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public function generate( WP_REST_Request $request ): WP_REST_Response { |
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$nonce = $this->nonce_guard( $request ); |
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if ( null !== $nonce ) { |
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return $nonce; |
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} |
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$disabled = $this->enabled_guard(); |
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if ( null !== $disabled ) { |
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return $disabled; |
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} |
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|
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$brief = trim( (string) $request->get_param( 'message' ) ); |
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if ( '' === $brief ) { |
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return new WP_REST_Response( [ 'message' => __( 'A campaign brief is required.', 'better-payment' ) ], 400 ); |
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} |
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|
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// The category the user picked in the Smart Prompt Wizard, if any. Not |
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// validated against the registry here — CampaignGenerator falls back to |
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// inferring from the brief for anything it doesn't recognise, so an |
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// unknown slug degrades to the same path as no slug at all. |
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$category = sanitize_key( (string) $request->get_param( 'category' ) ); |
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|
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// The campaign fields the user filled in themselves. A key present but |
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// empty means they were asked and left it blank — the model may not fill |
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// that gap in for them. Absent entirely (free-form prompt) enforces |
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// nothing. See UserFieldGuard. |
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$fields = UserFieldGuard::sanitize( $request->get_param( 'fields' ) ); |
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|
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$result = CampaignGenerator::generate( $brief, $this->read_context( $request ), $category, $fields ); |
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if ( is_wp_error( $result ) ) { |
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return $this->error_response( $result ); |
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} |
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return new WP_REST_Response( $result, 200 ); |
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} |
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|
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public function analyze( WP_REST_Request $request ): WP_REST_Response { |
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$nonce = $this->nonce_guard( $request ); |
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if ( null !== $nonce ) { |
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return $nonce; |
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} |
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$disabled = $this->enabled_guard(); |
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if ( null !== $disabled ) { |
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return $disabled; |
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} |
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|
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$result = CampaignAnalyzer::analyze( $this->read_context( $request ) ); |
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if ( is_wp_error( $result ) ) { |
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return $this->error_response( $result ); |
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} |
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return new WP_REST_Response( $result, 200 ); |
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} |
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|
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/** |
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* Refine the Smart Prompt Wizard's brief before generation (text in, text |
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* out). Applies nothing — the improved brief is returned for the user to |
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* review and edit, then hand to /ai/generate. Same guards as the other AI |
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* routes: valid nonce, feature enabled, manage_options. |
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*/ |
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public function refine_brief( WP_REST_Request $request ): WP_REST_Response { |
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$nonce = $this->nonce_guard( $request ); |
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if ( null !== $nonce ) { |
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return $nonce; |
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} |
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$disabled = $this->enabled_guard(); |
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if ( null !== $disabled ) { |
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return $disabled; |
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} |
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|
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$brief = trim( (string) $request->get_param( 'brief' ) ); |
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if ( '' === $brief ) { |
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return new WP_REST_Response( [ 'message' => __( 'A brief is required.', 'better-payment' ) ], 400 ); |
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} |
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|
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$instruction = trim( (string) $request->get_param( 'instruction' ) ); |
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|
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$result = BriefWriter::write( $brief, $instruction ); |
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if ( is_wp_error( $result ) ) { |
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return $this->error_response( $result ); |
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} |
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return new WP_REST_Response( $result, 200 ); |
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} |
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|
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public function image( WP_REST_Request $request ): WP_REST_Response { |
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$nonce = $this->nonce_guard( $request ); |
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if ( null !== $nonce ) { |
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return $nonce; |
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} |
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$disabled = $this->enabled_guard(); |
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if ( null !== $disabled ) { |
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return $disabled; |
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} |
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|
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$prompt = trim( (string) $request->get_param( 'prompt' ) ); |
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if ( '' === $prompt ) { |
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return new WP_REST_Response( [ 'message' => __( 'An image prompt is required.', 'better-payment' ) ], 400 ); |
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} |
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|
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$result = ImageGenerator::generate( $prompt, (int) $request->get_param( 'campaign_id' ) ); |
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if ( is_wp_error( $result ) ) { |
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return $this->error_response( $result ); |
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} |
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return new WP_REST_Response( $result, 200 ); |
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} |
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|
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public function get_conversation( WP_REST_Request $request ): WP_REST_Response { |
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$id = (int) $request->get_param( 'id' ); |
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return new WP_REST_Response( [ 'messages' => ConversationManager::get( $id ) ], 200 ); |
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} |
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|
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/** |
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* Persist the full conversation for a campaign (the client is the source of |
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* truth for the message list). This is how the very first "create campaign" |
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* turn — which happens while the campaign is still unsaved (id 0), so it |
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* cannot be appended server-side during /ai/generate — gets written once the |
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* campaign has been saved and has an id. Replaces rather than appends, so a |
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* re-sync is idempotent. Nonce-guarded (write route) but NOT enabled-guarded: |
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* saving history the user already produced must keep working even if an admin |
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* later turns the AI Assistant off. |
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*/ |
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public function save_conversation( WP_REST_Request $request ): WP_REST_Response { |
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$nonce = $this->nonce_guard( $request ); |
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if ( null !== $nonce ) { |
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return $nonce; |
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} |
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$id = (int) $request->get_param( 'id' ); |
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$messages = ConversationManager::replace( $id, (array) $request->get_param( 'messages' ) ); |
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return new WP_REST_Response( [ 'messages' => $messages ], 200 ); |
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} |
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|
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public function clear_conversation( WP_REST_Request $request ): WP_REST_Response { |
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$nonce = $this->nonce_guard( $request ); |
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if ( null !== $nonce ) { |
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return $nonce; |
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} |
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ConversationManager::clear( (int) $request->get_param( 'id' ) ); |
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return new WP_REST_Response( [ 'ok' => true ], 200 ); |
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} |
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|
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public function get_config( WP_REST_Request $request ): WP_REST_Response { |
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$provider = AIManager::active_provider(); |
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return new WP_REST_Response( [ |
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'enabled' => AIManager::is_enabled(), |
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'active' => AIManager::active_provider_id(), |
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'configured' => null !== $provider && $provider->is_configured(), |
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'providers' => ProviderRegistry::descriptors(), |
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'operations' => OperationRegistry::names(), |
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], 200 ); |
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} |
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|
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// ------------------------------------------------------------------ helpers |
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|
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/** |
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* Read the trusted { layout, meta } context from the request body. |
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* |
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* @return array{ layout: array, meta: array } |
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*/ |
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private function read_context( WP_REST_Request $request ): array { |
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$context = $request->get_param( 'context' ); |
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$context = is_array( $context ) ? $context : []; |
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return [ |
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'layout' => is_array( $context['layout'] ?? null ) ? $context['layout'] : [], |
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'meta' => is_array( $context['meta'] ?? null ) ? $context['meta'] : [], |
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]; |
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} |
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|
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/** |
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* Nonce guard for write routes. Returns a 403 response when invalid, else null. |
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* |
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* @return WP_REST_Response|null |
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*/ |
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private function nonce_guard( WP_REST_Request $request ) { |
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if ( ! $this->valid_nonce( $request ) ) { |
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return new WP_REST_Response( [ 'message' => __( 'Invalid nonce', 'better-payment' ) ], 403 ); |
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} |
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return null; |
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} |
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|
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private function valid_nonce( WP_REST_Request $request ): bool { |
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$nonce = $request->get_header( 'x_wp_nonce' ); |
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return (bool) wp_verify_nonce( $nonce, 'wp_rest' ); |
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} |
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|
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/** |
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* Guard for routes that call out to an AI provider. Returns a 403 response |
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* when the AI Assistant is disabled in settings, else null. |
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* |
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* @return WP_REST_Response|null |
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*/ |
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private function enabled_guard() { |
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if ( ! AIManager::is_enabled() ) { |
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return new WP_REST_Response( [ |
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'code' => 'ai_disabled', |
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'message' => __( 'The AI Assistant is disabled. Enable it under Settings → AI Assistant.', 'better-payment' ), |
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], 403 ); |
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} |
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return null; |
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} |
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|
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/** |
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* Convert a WP_Error to a REST response using its status. |
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*/ |
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private function error_response( $error ): WP_REST_Response { |
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$status = 500; |
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$data = $error->get_error_data(); |
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if ( is_array( $data ) && isset( $data['status'] ) ) { |
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$status = (int) $data['status']; |
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} |
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return new WP_REST_Response( [ |
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'code' => $error->get_error_code(), |
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'message' => $error->get_error_message(), |
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], $status ); |
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} |
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|
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public function check_admin_permissions() { |
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if ( ! current_user_can( 'manage_options' ) ) { |
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return new \WP_Error( 'unauthorized', 'Unauthorized', [ 'status' => 401 ] ); |
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} |
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return true; |
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} |
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} |
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|
