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<?php /** * WP AI Client: WP_AI_Client_Prompt_Builder class * * @package WordPress * @subpackage AI * @since 7.0.0 / use WordPress\AiClient\AiClient; use WordPress\AiClient\Builders\PromptBuilder; use WordPress\AiClient\Common\Exception\InvalidArgumentException; use WordPress\AiClient\Common\Exception\TokenLimitReachedException; use WordPress\AiClient\Files\DTO\File; use WordPress\AiClient\Files\Enums\FileTypeEnum; use WordPress\AiClient\Files\Enums\MediaOrientationEnum; use WordPress\AiClient\Messages\DTO\Message; use WordPress\AiClient\Messages\DTO\MessagePart; use WordPress\AiClient\Messages\Enums\ModalityEnum; use WordPress\AiClient\Providers\Http\DTO\RequestOptions; use WordPress\AiClient\Providers\Http\Exception\ClientException; use WordPress\AiClient\Providers\Http\Exception\NetworkException; use WordPress\AiClient\Providers\Http\Exception\ServerException; use WordPress\AiClient\Providers\Models\Contracts\ModelInterface; use WordPress\AiClient\Providers\Models\DTO\ModelConfig; use WordPress\AiClient\Providers\Models\Enums\CapabilityEnum; use WordPress\AiClient\Providers\ProviderRegistry; use WordPress\AiClient\Results\DTO\GenerativeAiResult; use WordPress\AiClient\Tools\DTO\FunctionDeclaration; use WordPress\AiClient\Tools\DTO\FunctionResponse; use WordPress\AiClient\Tools\DTO\WebSearch; /* * Fluent builder for constructing AI prompts, returning WP_Error on failure. * * This class provides a fluent interface for building prompts with various * content types and model configurations. It wraps the PHP AI Client SDK's * PromptBuilder and adds WordPress-specific behavior including WP_Error * handling instead of exceptions, snake_case method naming, and integration * with the Abilities API. * * Only the generating methods will return a WP_Error, to not break the fluent * interface. As soon as any exception is caught in a chain of method calls, * the returned instance will be in an error state, and all subsequent method * calls will be no-ops that just return the same error state instance. Only * when a generating method is called, the WP_Error will be returned. * * @since 7.0.0 * * @phpstan-import-type Prompt from PromptBuilder * * @method self with_text(string $text) Adds text to the current message. * @method self with_file($file, ?string $mimeType = null) Adds a file to the current message. * @method self with_function_response(FunctionResponse $functionResponse) Adds a function response to the current message. * @method self with_message_parts(MessagePart ...$parts) Adds message parts to the current message. * @method self with_history(Message ...$messages) Adds conversation history messages. * @method self using_model(ModelInterface $model) Sets the model to use for generation. * @method self using_model_preference(...$preferredModels) Sets preferred models to evaluate in order. * @method self using_model_config(ModelConfig $config) Sets the model configuration. * @method self using_provider(string $providerIdOrClassName) Sets the provider to use for generation. * @method self using_system_instruction(string $systemInstruction) Sets the system instruction. * @method self using_max_tokens(int $maxTokens) Sets the maximum number of tokens to generate. * @method self using_temperature(float $temperature) Sets the temperature for generation. * @method self using_top_p(float $topP) Sets the top-p value for generation. * @method self using_top_k(int $topK) Sets the top-k value for generation. * @method self using_stop_sequences(string ...$stopSequences) Sets stop sequences for generation. * @method self using_candidate_count(int $candidateCount) Sets the number of candidates to generate. * @method self using_function_declarations(FunctionDeclaration ...$functionDeclarations) Sets the function declarations available to the model. * @method self using_presence_penalty(float $presencePenalty) Sets the presence penalty for generation. * @method self using_frequency_penalty(float $frequencyPenalty) Sets the frequency penalty for generation. * @method self using_web_search(WebSearch $webSearch) Sets the web search configuration. * @method self using_request_options(RequestOptions $options) Sets the request options for HTTP transport. * @method self using_top_logprobs(?int $topLogprobs = null) Sets the top log probabilities configuration. * @method self as_output_mime_type(string $mimeType) Sets the output MIME type. * @method self as_output_schema(array<string, mixed> $schema) Sets the output schema. * @method self as_output_modalities(ModalityEnum ...$modalities) Sets the output modalities. * @method self as_output_file_type(FileTypeEnum $fileType) Sets the output file type. * @method self as_output_media_orientation(MediaOrientationEnum $orientation) Sets the output media orientation. * @method self as_output_media_aspect_ratio(string $aspectRatio) Sets the output media aspect ratio. * @method self as_output_speech_voice(string $voice) Sets the output speech voice. * @method self as_json_response(?array<string, mixed> $schema = null) Configures the prompt for JSON response output. * @method bool\|WP_Error is_supported(?CapabilityEnum $capability = null) Checks if the prompt is supported for the given capability. * @method bool is_supported_for_text_generation() Checks if the prompt is supported for text generation. * @method bool is_supported_for_image_generation() Checks if the prompt is supported for image generation. * @method bool is_supported_for_text_to_speech_conversion() Checks if the prompt is supported for text to speech conversion. * @method bool is_supported_for_video_generation() Checks if the prompt is supported for video generation. * @method bool is_supported_for_speech_generation() Checks if the prompt is supported for speech generation. * @method bool is_supported_for_music_generation() Checks if the prompt is supported for music generation. * @method bool is_supported_for_embedding_generation() Checks if the prompt is supported for embedding generation. * @method GenerativeAiResult\|WP_Error generate_result(?CapabilityEnum $capability = null) Generates a result from the prompt. * @method GenerativeAiResult\|WP_Error generate_text_result() Generates a text result from the prompt. * @method GenerativeAiResult\|WP_Error generate_image_result() Generates an image result from the prompt. * @method GenerativeAiResult\|WP_Error generate_speech_result() Generates a speech result from the prompt. * @method GenerativeAiResult\|WP_Error convert_text_to_speech_result() Converts text to speech and returns the result. * @method GenerativeAiResult\|WP_Error generate_video_result() Generates a video result from the prompt. * @method string\|WP_Error generate_text() Generates text from the prompt. * @method list<string>\|WP_Error generate_texts(?int $candidateCount = null) Generates multiple text candidates from the prompt. * @method File\|WP_Error generate_image() Generates an image from the prompt. * @method list<File>\|WP_Error generate_images(?int $candidateCount = null) Generates multiple images from the prompt. * @method File\|WP_Error convert_text_to_speech() Converts text to speech. * @method list<File>\|WP_Error convert_text_to_speeches(?int $candidateCount = null) Converts text to multiple speech outputs. * @method File\|WP_Error generate_speech() Generates speech from the prompt. * @method list<File>\|WP_Error generate_speeches(?int $candidateCount = null) Generates multiple speech outputs from the prompt. * @method File\|WP_Error generate_video() Generates a video from the prompt. * @method list<File>\|WP_Error generate_videos(?int $candidateCount = null) Generates multiple videos from the prompt. / class WP_AI_Client_Prompt_Builder { /* * Wrapped prompt builder instance from the PHP AI Client SDK. * * @since 7.0.0 * @var PromptBuilder / private PromptBuilder $builder; /* * WordPress error instance, if any error occurred during method calls. * * @since 7.0.0 * @var WP_Error\|null / private ?WP_Error $error = null; /* * List of methods that generate a result from the prompt. * * Structured as a map for faster lookups. * * @since 7.0.0 * @var array<string, bool> / private static array $generating_methods = array( 'generate_result' => true, 'generate_text_result' => true, 'generate_image_result' => true, 'generate_speech_result' => true, 'convert_text_to_speech_result' => true, 'generate_video_result' => true, 'generate_text' => true, 'generate_texts' => true, 'generate_image' => true, 'generate_images' => true, 'convert_text_to_speech' => true, 'convert_text_to_speeches' => true, 'generate_speech' => true, 'generate_speeches' => true, 'generate_video' => true, 'generate_videos' => true, ); /* * List of methods that check whether the prompt is supported. * * Structured as a map for faster lookups. * * @since 7.0.0 * @var array<string, bool> / private static array $support_check_methods = array( 'is_supported' => true, 'is_supported_for_text_generation' => true, 'is_supported_for_image_generation' => true, 'is_supported_for_text_to_speech_conversion' => true, 'is_supported_for_video_generation' => true, 'is_supported_for_speech_generation' => true, 'is_supported_for_music_generation' => true, 'is_supported_for_embedding_generation' => true, ); /* * Constructor. * * @since 7.0.0 * * @param ProviderRegistry $registry The provider registry for finding suitable models. * @param Prompt $prompt Optional. Initial prompt content. * A string for simple text prompts, * a MessagePart or Message object for * structured content, an array for a * message array shape, or a list of * parts or messages for multi-turn * conversations. Default null. / public function __construct( ProviderRegistry $registry, $prompt = null ) { try { $this->builder = new PromptBuilder( $registry, $prompt, AiClient::getEventDispatcher() ); } catch ( Exception $e ) { $this->builder = new PromptBuilder( $registry, null, AiClient::getEventDispatcher() ); $this->error = $this->exception_to_wp_error( $e ); } $default_timeout = 30.0; /* * Filters the default request timeout in seconds for AI Client HTTP requests. * * @since 7.0.0 * * @param float $default_timeout The default timeout in seconds. / $filtered_default_timeout = apply_filters( 'wp_ai_client_default_request_timeout', $default_timeout ); if ( is_numeric( $filtered_default_timeout ) && (float) $filtered_default_timeout >= 0.0 ) { $default_timeout = (float) $filtered_default_timeout; } else { _doing_it_wrong( __METHOD__, sprintf( / translators: %s: wp_ai_client_default_request_timeout / __( 'The %s filter must return a non-negative number.' ), '<code>wp_ai_client_default_request_timeout</code>' ), '7.0.0' ); } $this->builder->usingRequestOptions( RequestOptions::fromArray( array( RequestOptions::KEY_TIMEOUT => $default_timeout, ) ) ); } /* * Registers WordPress abilities as function declarations for the AI model. * * Converts each WP_Ability to a FunctionDeclaration using the wpab__ prefix * naming convention and passes them to the underlying prompt builder. * * @since 7.0.0 * * @param WP_Ability\|string ...$abilities The abilities to register, either as WP_Ability objects or ability name strings. * @return self The current instance for method chaining. / public function using_abilities( ...$abilities ): self { $declarations = array(); foreach ( $abilities as $ability ) { if ( is_string( $ability ) ) { $ability_name = $ability; $ability = wp_get_ability( $ability ); if ( ! $ability ) { _doing_it_wrong( __METHOD__, sprintf( / translators: %s: string value of the ability name. / __( 'The ability %s was not found.' ), '<code>' . esc_html( $ability_name ) . '</code>' ), '7.0.0' ); continue; } } // This is only here as a sanity check, the method signature should ensure this already. if ( ! $ability instanceof WP_Ability ) { continue; } $function_name = WP_AI_Client_Ability_Function_Resolver::ability_name_to_function_name( $ability->get_name() ); $input_schema = $ability->get_input_schema(); $declarations[] = new FunctionDeclaration( $function_name, $ability->get_description(), ! empty( $input_schema ) ? $input_schema : null ); } if ( ! empty( $declarations ) ) { return $this->using_function_declarations( ...$declarations ); } return $this; } /* * Magic method to proxy snake_case method calls to their PHP AI Client camelCase counterparts. * * This allows WordPress developers to use snake_case naming conventions. It catches * any exceptions thrown, stores them, and returns a WP_Error when a terminate method * is called. * * @since 7.0.0 * * @param string $name The method name in snake_case. * @param array<int, mixed> $arguments The method arguments. * @return mixed The result of the method call. / public function __call( string $name, array $arguments ) { / * If an error occurred in a previous method call, either return the error for terminate methods, * or return the same instance for other methods to maintain the fluent interface. / if ( null !== $this->error ) { if ( self::is_generating_method( $name ) ) { return $this->error; } if ( self::is_support_check_method( $name ) ) { return false; } return $this; } // Check if the prompt should be prevented for is_supported and generate_/convert_text_to_speech methods. if ( self::is_support_check_method( $name ) \|\| self::is_generating_method( $name ) ) { // If AI is not supported, then there's no need to apply the filter as the prompt will be prevented anyway. $is_ai_disabled = ! wp_supports_ai(); $prevent = $is_ai_disabled; if ( ! $prevent ) { /** * Filters whether to prevent the prompt from being executed. * * @since 7.0.0 * * @param bool $prevent Whether to prevent the prompt. Default false. * @param WP_AI_Client_Prompt_Builder $builder A clone of the prompt builder instance (read-only). / $prevent = (bool) apply_filters( 'wp_ai_client_prevent_prompt', false, clone $this ); } if ( $prevent ) { // For is_supported methods, return false. if ( self::is_support_check_method( $name ) ) { return false; } $error_message = $is_ai_disabled ? __( 'AI features are not supported in this environment.' ) : __( 'Prompt execution was prevented by a filter.' ); // For generate_* and convert_text_to_speech* methods, create a WP_Error. $this->error = new WP_Error( 'prompt_prevented', $error_message, array( 'status' => 503, ) ); if ( self::is_generating_method( $name ) ) { return $this->error; } return $this; } } try { $callable = $this->get_builder_callable( $name ); $result = $callable( ...$arguments ); // If the result is a PromptBuilder, return the current instance to allow method chaining. if ( $result instanceof PromptBuilder ) { return $this; } return $result; } catch ( Exception $e ) { $this->error = $this->exception_to_wp_error( $e ); if ( self::is_generating_method( $name ) ) { return $this->error; } return $this; } } /** * Converts an exception into a WP_Error with a structured error code and message. * * This method maps different exception types to specific WP_Error codes and HTTP status codes. * The presence of the status codes means these WP_Error objects can be easily used in REST API responses * or other contexts where HTTP semantics are relevant. * * @since 7.0.0 * * @param Exception $e The exception to convert. * @return WP_Error The resulting WP_Error object. / private function exception_to_wp_error( Exception $e ): WP_Error { if ( $e instanceof NetworkException ) { $error_code = 'prompt_network_error'; $status_code = 503; } elseif ( $e instanceof ClientException ) { // `ClientException` uses HTTP status codes as exception codes, so we can rely on them. $error_code = 'prompt_client_error'; $status_code = $e->getCode() ? $e->getCode() : 400; } elseif ( $e instanceof ServerException ) { // `ServerException` uses HTTP status codes as exception codes, so we can rely on them. $error_code = 'prompt_upstream_server_error'; $status_code = $e->getCode() ? $e->getCode() : 500; } elseif ( $e instanceof TokenLimitReachedException ) { $error_code = 'prompt_token_limit_reached'; $status_code = 400; } elseif ( $e instanceof InvalidArgumentException ) { $error_code = 'prompt_invalid_argument'; $status_code = 400; } else { $error_code = 'prompt_builder_error'; $status_code = 500; } return new WP_Error( $error_code, $e->getMessage(), array( 'status' => $status_code, 'exception_class' => get_class( $e ), ) ); } /* * Checks if a method name is a support check method (is_supported). * @since 7.0.0 * * @param string $name The method name. * @return bool True if the method is a support check method, false otherwise. / private static function is_support_check_method( string $name ): bool { return isset( self::$support_check_methods[ $name ] ); } /* * Checks if a method name is a generating method (generate_, convert_text_to_speech). * * @since 7.0.0 * * @param string $name The method name. * @return bool True if the method is a generating method, false otherwise. / private static function is_generating_method( string $name ): bool { return isset( self::$generating_methods[ $name ] ); } /* * Retrieves a callable for a given PHP AI Client SDK prompt builder method name. * * @since 7.0.0 * * @param string $name The method name in snake_case. * @return callable The callable for the specified method. * * @throws BadMethodCallException If the method does not exist. / protected function get_builder_callable( string $name ): callable { $camel_case_name = $this->snake_to_camel_case( $name ); $method = array( $this->builder, $camel_case_name ); if ( ! is_callable( $method ) ) { throw new BadMethodCallException( sprintf( / translators: 1: Method name. 2: Class name. / __( 'Method %1$s does not exist on %2$s.' ), $name, // phpcs:ignore WordPress.Security.EscapeOutput.ExceptionNotEscaped get_class( $this->builder ) // phpcs:ignore WordPress.Security.EscapeOutput.ExceptionNotEscaped ) ); } return $method; } /* * Converts snake_case to camelCase. * * @since 7.0.0 * * @param string $snake_case The snake_case string. * @return string The camelCase string. */ private function snake_to_camel_case( string $snake_case ): string { $parts = explode( '_', $snake_case ); $camel_case = $parts[0]; $parts_count = count( $parts ); for ( $i = 1; $i < $parts_count; $i++ ) { $camel_case .= ucfirst( $parts[ $i ] ); } return $camel_case; } }

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