<?php
/**
* OpenAI DALL·E integration
*/
namespace Classifai\Providers\OpenAI;
use Classifai\Features\ImageGeneration;
use Classifai\Providers\Provider;
use Classifai\Providers\OpenAI\APIRequest;
use WP_Error;
use WP_REST_Server;
class DallE extends Provider {
use \Classifai\Providers\OpenAI\OpenAI;
const ID = 'openai_dalle';
/**
* OpenAI DALL·E URL.
*
* @var string
*/
protected $dalle_url = 'https://api.openai.com/v1/images/generations';
/**
* Maximum number of characters a prompt can have.
*
* @var int
*/
public $max_prompt_chars = 4000;
/**
* OpenAI DALL·E constructor.
*
* @param \Classifai\Features\Feature $feature_instance The feature instance.
*/
public function __construct( $feature_instance = null ) {
$this->feature_instance = $feature_instance;
}
/**
* Register what we need for the provider.
*
* This only fires if can_register returns true.
*/
public function register() {
add_filter( 'classifai_' . ImageGeneration::ID . '_rest_route_generate-image_args', [ $this, 'register_rest_args' ] );
}
/**
* Register settings for the provider.
*/
public function render_provider_fields() {
$settings = $this->feature_instance->get_settings( static::ID );
add_settings_field(
static::ID . '_api_key',
esc_html__( 'API Key', 'classifai' ),
[ $this->feature_instance, 'render_input' ],
$this->feature_instance->get_option_name(),
$this->feature_instance->get_option_name() . '_section',
[
'option_index' => static::ID,
'label_for' => 'api_key',
'input_type' => 'password',
'default_value' => $settings['api_key'],
'class' => 'classifai-provider-field hidden provider-scope-' . static::ID,
'description' => sprintf(
wp_kses(
/* translators: %1$s is replaced with the OpenAI sign up URL */
__( 'Don\'t have an OpenAI account yet? <a title="Sign up for an OpenAI account" href="%1$s">Sign up for one</a> in order to get your API key.', 'classifai' ),
[
'a' => [
'href' => [],
'title' => [],
],
]
),
esc_url( 'https://platform.openai.com/signup' )
),
]
);
add_settings_field(
static::ID . '_number_of_images',
esc_html__( 'Number of images', 'classifai' ),
[ $this->feature_instance, 'render_select' ],
$this->feature_instance->get_option_name(),
$this->feature_instance->get_option_name() . '_section',
[
'option_index' => static::ID,
'label_for' => 'number_of_images',
'options' => array_combine( range( 1, 10 ), range( 1, 10 ) ),
'default_value' => $settings['number_of_images'],
'description' => __( 'Number of images that will be generated in one request. Note that each image will incur separate costs.', 'classifai' ),
'class' => 'classifai-provider-field hidden provider-scope-' . static::ID,
]
);
add_settings_field(
static::ID . '_quality',
esc_html__( 'Image quality', 'classifai' ),
[ $this->feature_instance, 'render_select' ],
$this->feature_instance->get_option_name(),
$this->feature_instance->get_option_name() . '_section',
[
'option_index' => static::ID,
'label_for' => 'quality',
'options' => [
'standard' => __( 'Standard', 'classifai' ),
'hd' => __( 'High Definition', 'classifai' ),
],
'default_value' => $settings['quality'],
'description' => __( 'The quality of the image that will be generated. High Definition creates images with finer details and greater consistency across the image but costs more.', 'classifai' ),
'class' => 'classifai-provider-field hidden provider-scope-' . static::ID,
]
);
add_settings_field(
static::ID . '_image_size',
esc_html__( 'Image size', 'classifai' ),
[ $this->feature_instance, 'render_select' ],
$this->feature_instance->get_option_name(),
$this->feature_instance->get_option_name() . '_section',
[
'option_index' => static::ID,
'label_for' => 'image_size',
'options' => [
'1024x1024' => '1024x1024 (square)',
'1792x1024' => '1792x1024 (landscape)',
'1024x1792' => '1024x1792 (portrait)',
],
'default_value' => $settings['image_size'],
'description' => __( 'Size of generated images. Larger sizes cost more.', 'classifai' ),
'class' => 'classifai-provider-field hidden provider-scope-' . static::ID,
]
);
add_settings_field(
static::ID . '_style',
esc_html__( 'Image style', 'classifai' ),
[ $this->feature_instance, 'render_select' ],
$this->feature_instance->get_option_name(),
$this->feature_instance->get_option_name() . '_section',
[
'option_index' => static::ID,
'label_for' => 'style',
'options' => [
'vivid' => __( 'Vivid', 'classifai' ),
'natural' => __( 'Natural', 'classifai' ),
],
'default_value' => $settings['style'],
'description' => __( 'The style of the generated images. Vivid causes more hyper-real and dramatic images. Natural causes more natural, less hyper-real looking images.', 'classifai' ),
'class' => 'classifai-provider-field hidden provider-scope-' . static::ID,
]
);
}
/**
* Returns the default settings for the provider.
*
* @return array
*/
public function get_default_provider_settings(): array {
$common_settings = [
'api_key' => '',
'authenticated' => false,
];
switch ( $this->feature_instance::ID ) {
case ImageGeneration::ID:
return array_merge(
$common_settings,
[
'number_of_images' => 1,
'quality' => 'standard',
'image_size' => '1024x1024',
'style' => 'vivid',
]
);
}
return $common_settings;
}
/**
* Sanitization for the options being saved.
*
* @param array $new_settings Array of settings about to be saved.
* @return array The sanitized settings to be saved.
*/
public function sanitize_settings( array $new_settings ): array {
$settings = $this->feature_instance->get_settings();
$api_key_settings = $this->sanitize_api_key_settings( $new_settings, $settings );
$new_settings[ static::ID ]['api_key'] = $api_key_settings[ static::ID ]['api_key'];
$new_settings[ static::ID ]['authenticated'] = $api_key_settings[ static::ID ]['authenticated'];
if ( $this->feature_instance instanceof ImageGeneration ) {
$new_settings[ static::ID ]['number_of_images'] = absint( $new_settings[ static::ID ]['number_of_images'] ?? $settings[ static::ID ]['number_of_images'] );
if ( in_array( $new_settings[ static::ID ]['quality'], [ 'standard', 'hd' ], true ) ) {
$new_settings[ static::ID ]['quality'] = sanitize_text_field( $new_settings[ static::ID ]['quality'] );
} else {
$new_settings[ static::ID ]['quality'] = $settings[ static::ID ]['quality'];
}
if ( in_array( $new_settings[ static::ID ]['image_size'], [ '1024x1024', '1792x1024', '1024x1792' ], true ) ) {
$new_settings[ static::ID ]['image_size'] = sanitize_text_field( $new_settings[ static::ID ]['image_size'] );
} else {
$new_settings[ static::ID ]['image_size'] = $settings[ static::ID ]['image_size'];
}
if ( in_array( $new_settings[ static::ID ]['style'], [ 'vivid', 'natural' ], true ) ) {
$new_settings[ static::ID ]['style'] = sanitize_text_field( $new_settings[ static::ID ]['style'] );
} else {
$new_settings[ static::ID ]['style'] = $settings[ static::ID ]['style'];
}
}
return $new_settings;
}
/**
* Common entry point for all REST endpoints for this provider.
*
* @param string $prompt The prompt used to generate an image.
* @param string $route_to_call The route we are processing.
* @param array $args Optional arguments to pass to the route.
* @return string|WP_Error
*/
public function rest_endpoint_callback( $prompt = '', string $route_to_call = '', array $args = [] ) {
$route_to_call = strtolower( $route_to_call );
$return = '';
// Handle all of our routes.
switch ( $route_to_call ) {
case 'image_gen':
$return = $this->generate_image( $prompt, $args );
break;
}
return $return;
}
/**
* Entry point for the generate-image REST endpoint.
*
* @param string $prompt The prompt used to generate an image.
* @param array $args Optional arguments passed to endpoint.
* @return string|WP_Error
*/
public function generate_image( string $prompt = '', array $args = [] ) {
if ( ! $prompt ) {
return new WP_Error( 'prompt_required', esc_html__( 'A prompt is required to generate an image.', 'classifai' ) );
}
$image_generation = new ImageGeneration();
$settings = $image_generation->get_settings( static::ID );
$args = wp_parse_args(
array_filter( $args ),
[
'num' => $settings['number_of_images'] ?? 1,
'quality' => $settings['quality'] ?? 'standard',
'size' => $settings['image_size'] ?? '1024x1024',
'style' => $settings['style'] ?? 'vivid',
'format' => 'url',
]
);
// Force proper image size for those that had been using DALL·E 2 and haven't updated settings.
if ( ! in_array( $args['size'], [ '1024x1024', '1792x1024', '1024x1792' ], true ) ) {
$args['size'] = '1024x1024';
}
if ( ! $image_generation->is_feature_enabled() ) {
return new WP_Error( 'not_enabled', esc_html__( 'Image generation is disabled or OpenAI authentication failed. Please check your settings.', 'classifai' ) );
}
/**
* Filter the prompt we will send to DALL·E.
*
* @since 2.0.0
* @hook classifai_dalle_prompt
*
* @param {string} $prompt Prompt we are sending to DALL·E.
*
* @return {string} Prompt.
*/
$prompt = apply_filters( 'classifai_dalle_prompt', $prompt );
// If our prompt exceeds the max length, throw an error.
if ( mb_strlen( $prompt ) > $this->max_prompt_chars ) {
return new WP_Error( 'invalid_param', esc_html__( 'Your image prompt is too long. Please ensure it doesn\'t exceed 1000 characters.', 'classifai' ) );
}
$request = new APIRequest( $settings['api_key'] ?? '', 'generate-image' );
/**
* Filter the request body before sending to DALL·E.
*
* @since 2.0.0
* @hook classifai_dalle_request_body
*
* @param {array} $body Request body that will be sent to DALL·E.
*
* @return {array} Request body.
*/
$body = apply_filters(
'classifai_dalle_request_body',
[
'prompt' => sanitize_text_field( $prompt ),
'model' => 'dall-e-3',
'n' => 1,
'quality' => sanitize_text_field( $args['quality'] ),
'response_format' => sanitize_text_field( $args['format'] ),
'size' => sanitize_text_field( $args['size'] ),
'style' => sanitize_text_field( $args['style'] ),
]
);
$responses = [];
// DALL·E 3 doesn't support multiple images in a single request so make one request per image.
for ( $i = 0; $i < $args['num']; $i++ ) {
$responses[] = $request->post(
$this->dalle_url,
[
'body' => wp_json_encode( $body ),
]
);
}
set_transient( 'classifai_openai_dalle_latest_response', $responses[ array_key_last( $responses ) ], DAY_IN_SECONDS * 30 );
$cleaned_responses = [];
foreach ( $responses as $response ) {
// Extract out the image response, if it exists.
if ( ! is_wp_error( $response ) && ! empty( $response['data'] ) ) {
foreach ( $response['data'] as $data ) {
if ( ! empty( $data[ $args['format'] ] ) ) {
if ( 'url' === $args['format'] ) {
$cleaned_responses[] = [ 'url' => esc_url_raw( $data[ $args['format'] ] ) ];
} else {
$cleaned_responses[] = [ 'url' => $data[ $args['format'] ] ];
}
}
}
}
}
return $cleaned_responses;
}
/**
* Returns the debug information for the provider settings.
*
* @return array
*/
public function get_debug_information(): array {
$settings = $this->feature_instance->get_settings();
$provider_settings = $settings[ static::ID ];
$debug_info = [];
if ( $this->feature_instance instanceof ImageGeneration ) {
$debug_info[ __( 'Number of images', 'classifai' ) ] = $provider_settings['number_of_images'] ?? 1;
$debug_info[ __( 'Quality', 'classifai' ) ] = $provider_settings['quality'] ?? 'standard';
$debug_info[ __( 'Size', 'classifai' ) ] = $provider_settings['image_size'] ?? '1024x1024';
$debug_info[ __( 'Style', 'classifai' ) ] = $provider_settings['style'] ?? 'vivid';
$debug_info[ __( 'Latest response:', 'classifai' ) ] = $this->get_formatted_latest_response( get_transient( 'classifai_openai_dalle_latest_response' ) );
}
return apply_filters(
'classifai_' . self::ID . '_debug_information',
$debug_info,
$settings,
$this->feature_instance
);
}
/**
* Register additional REST arguments for the provider.
*
* @since 3.0.0
*
* @param array $args Existing REST arguments.
* @return array
*/
public function register_rest_args( array $args = [] ): array {
$provider_args = [
'n' => [
'type' => 'integer',
'minimum' => 1,
'maximum' => 10,
'sanitize_callback' => 'absint',
'validate_callback' => 'rest_validate_request_arg',
'description' => esc_html__( 'Number of images to generate', 'classifai' ),
],
'quality' => [
'type' => 'string',
'enum' => [
'standard',
'hd',
],
'sanitize_callback' => 'sanitize_text_field',
'validate_callback' => 'rest_validate_request_arg',
'description' => esc_html__( 'Quality of generated image', 'classifai' ),
],
'size' => [
'type' => 'string',
'enum' => [
'1024x1024',
'1792x1024',
'1024x1792',
],
'sanitize_callback' => 'sanitize_text_field',
'validate_callback' => 'rest_validate_request_arg',
'description' => esc_html__( 'Size of generated image', 'classifai' ),
],
'style' => [
'type' => 'string',
'enum' => [
'vivid',
'natural',
],
'sanitize_callback' => 'sanitize_text_field',
'validate_callback' => 'rest_validate_request_arg',
'description' => esc_html__( 'Style of generated image', 'classifai' ),
],
'format' => [
'type' => 'string',
'enum' => [
'url',
'b64_json',
],
'sanitize_callback' => 'sanitize_text_field',
'validate_callback' => 'rest_validate_request_arg',
'description' => esc_html__( 'Format of generated image', 'classifai' ),
],
];
// Merge the provider args with the existing args.
$args['args'] = array_merge( $args['args'], $provider_args );
return $args;
}
}