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Editing: class-wp-ai-client-ability-function-resolver.php
<?php /** * WP AI Client: WP_AI_Client_Ability_Function_Resolver class * * @package WordPress * @subpackage AI * @since 7.0.0 */ use WordPress\AiClient\Messages\DTO\Message; use WordPress\AiClient\Messages\DTO\MessagePart; use WordPress\AiClient\Messages\DTO\UserMessage; use WordPress\AiClient\Tools\DTO\FunctionCall; use WordPress\AiClient\Tools\DTO\FunctionResponse; /** * Resolves and executes WordPress Abilities API function calls from AI models. * * This class must be instantiated with the specific abilities that the AI model * is allowed to execute, ensuring that only explicitly specified abilities can * be called. This prevents the model from executing arbitrary abilities. * * @since 7.0.0 */ class WP_AI_Client_Ability_Function_Resolver { /** * Prefix used to identify ability function calls. * * @since 7.0.0 * @var string */ private const ABILITY_PREFIX = 'wpab__'; /** * Map of allowed ability names for this instance. * * Keys are ability name strings, values are `true` for O(1) lookup. * * @since 7.0.0 * @var array<string, true> */ private array $allowed_abilities; /** * Constructor. * * @since 7.0.0 * * @param WP_Ability|string ...$abilities The abilities that this resolver is allowed to execute. */ public function __construct( ...$abilities ) { $this->allowed_abilities = array(); foreach ( $abilities as $ability ) { if ( $ability instanceof WP_Ability ) { $this->allowed_abilities[ $ability->get_name() ] = true; } elseif ( is_string( $ability ) ) { $this->allowed_abilities[ $ability ] = true; } } } /** * Checks if a function call is an ability call. * * @since 7.0.0 * * @param FunctionCall $call The function call to check. * @return bool True if the function call is an ability call, false otherwise. */ public function is_ability_call( FunctionCall $call ): bool { $name = $call->getName(); if ( null === $name ) { return false; } return str_starts_with( $name, self::ABILITY_PREFIX ); } /** * Executes a WordPress ability from a function call. * * Only abilities that were specified in the constructor are allowed to be * executed. If the ability is not in the allowed list, an error response * with code `ability_not_allowed` is returned. * * @since 7.0.0 * * @param FunctionCall $call The function call to execute. * @return FunctionResponse The response from executing the ability. */ public function execute_ability( FunctionCall $call ): FunctionResponse { $function_name = $call->getName() ?? 'unknown'; $function_id = $call->getId() ?? 'unknown'; if ( ! $this->is_ability_call( $call ) ) { return new FunctionResponse( $function_id, $function_name, array( 'error' => __( 'Not an ability function call' ), 'code' => 'invalid_ability_call', ) ); } $ability_name = self::function_name_to_ability_name( $function_name ); if ( ! isset( $this->allowed_abilities[ $ability_name ] ) ) { return new FunctionResponse( $function_id, $function_name, array( /* translators: %s: ability name */ 'error' => sprintf( __( 'Ability "%s" was not specified in the allowed abilities list.' ), $ability_name ), 'code' => 'ability_not_allowed', ) ); } $ability = wp_get_ability( $ability_name ); if ( ! $ability instanceof WP_Ability ) { return new FunctionResponse( $function_id, $function_name, array( /* translators: %s: ability name */ 'error' => sprintf( __( 'Ability "%s" not found' ), $ability_name ), 'code' => 'ability_not_found', ) ); } $args = $call->getArgs(); $result = $ability->execute( ! empty( $args ) ? $args : null ); if ( is_wp_error( $result ) ) { return new FunctionResponse( $function_id, $function_name, array( 'error' => $result->get_error_message(), 'code' => $result->get_error_code(), 'data' => $result->get_error_data(), ) ); } return new FunctionResponse( $function_id, $function_name, $result ); } /** * Checks if a message contains any ability function calls. * * @since 7.0.0 * * @param Message $message The message to check. * @return bool True if the message contains ability calls, false otherwise. */ public function has_ability_calls( Message $message ): bool { foreach ( $message->getParts() as $part ) { if ( $part->getType()->isFunctionCall() ) { $function_call = $part->getFunctionCall(); if ( $function_call instanceof FunctionCall && $this->is_ability_call( $function_call ) ) { return true; } } } return false; } /** * Executes all ability function calls in a message. * * @since 7.0.0 * * @param Message $message The message containing function calls. * @return Message A new message with function responses. */ public function execute_abilities( Message $message ): Message { $response_parts = array(); foreach ( $message->getParts() as $part ) { if ( $part->getType()->isFunctionCall() ) { $function_call = $part->getFunctionCall(); if ( $function_call instanceof FunctionCall ) { $function_response = $this->execute_ability( $function_call ); $response_parts[] = new MessagePart( $function_response ); } } } return new UserMessage( $response_parts ); } /** * Converts an ability name to a function name. * * Transforms "tec/create_event" to "wpab__tec__create_event". * * @since 7.0.0 * * @param string $ability_name The ability name to convert. * @return string The function name. */ public static function ability_name_to_function_name( string $ability_name ): string { return self::ABILITY_PREFIX . str_replace( '/', '__', $ability_name ); } /** * Converts a function name to an ability name. * * Transforms "wpab__tec__create_event" to "tec/create_event". * * @since 7.0.0 * * @param string $function_name The function name to convert. * @return string The ability name. */ public static function function_name_to_ability_name( string $function_name ): string { $without_prefix = substr( $function_name, strlen( self::ABILITY_PREFIX ) ); return str_replace( '__', '/', $without_prefix ); } }
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