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<?php
namespace TrxAddons\AiHelper;
if ( ! defined( 'ABSPATH' ) ) {
exit;
}
/**
* Class to make queries to the Stability AI API
*/
class StabilityAi extends Api {
/**
* Class constructor.
*
* @access protected
*/
protected function __construct() {
parent::__construct();
$this->logger_section = 'stability-ai';
$this->token_option = 'ai_helper_token_stability_ai';
}
/**
* Return a base URL to the vendor site
*
* @param string $endpoint The endpoint to use
* @param string $type The type of the URL: api or site. Default: site
*
* @return string The URL to the vendor site
*/
public function get_url( $endpoint = '', $type = 'site' ) {
return \ThemeRex\StabilityAi\Images::baseUrl( $endpoint, $type );
}
/**
* Return an object of the API
*
* @param string $token API token for the API
*
* @return api The object of the API
*/
public function get_api( $token = '' ) {
if ( empty( $this->api ) ) {
if ( empty( $token ) ) {
$token = $this->get_token();
}
if ( ! empty( $token ) ) {
$this->api = new \ThemeRex\StabilityAi\Images( $token );
}
}
return $this->api;
}
/**
* Return a cfg scale for the API
*
* @access protected
*
* @return float Cfg scale for the API
*/
protected function get_cfg_scale() {
return (float)trx_addons_get_option( 'ai_helper_cfg_scale_stability_ai', 7 );
}
/**
* Return diffusion steps for the API
*
* @access protected
*
* @return int Diffusion steps for the API
*/
protected function get_diffusion_steps() {
return (int)trx_addons_get_option( 'ai_helper_diffusion_steps_stability_ai', 50 );
}
/**
* Return a weight of the text prompt for the API
*
* @access protected
*
* @return float Weight of the text prompt for the API
*/
protected function get_prompt_weight() {
return (float)trx_addons_get_option( 'ai_helper_prompt_weight_stability_ai', 1.0 );
}
/**
* Return a default model for the API
*
* @access protected
*
* @return string Default model for the API
*/
protected function get_default_model() {
return 'stable-diffusion-xl-1024-v1-0';
}
/**
* Prepare arguments for the API format
*
* @access protected
*
* @param array $args Arguments to prepare
*
* @return array Prepared arguments
*/
protected function prepare_args( $args, $convert_prompts = false ) {
// token => key
if ( ! isset( $args['key'] ) ) {
$args['key'] = $args['token'];
unset( $args['token'] );
}
// prompt => text_prompts
if ( ! isset( $args['text_prompts'] ) ) {
$args['text_prompts'] = array();
if ( ! empty( $args['prompt'] ) ) {
$args['text_prompts'][] = array(
'text' => $args['prompt'],
'weight' => $this->get_prompt_weight()
);
unset( $args['prompt'] );
}
if ( ! empty( $args['negative_prompt'] ) ) {
$args['text_prompts'][] = array(
'text' => $args['negative_prompt'],
'weight' => -1 * $this->get_prompt_weight()
);
unset( $args['negative_prompt'] );
}
}
// Convert the parameter 'text_prompts' from an array to the format 'text_prompts[number][text]' and 'text_prompts[number][weight]'
if ( $convert_prompts ) {
foreach( $args['text_prompts'] as $i => $prompt ) {
$args[ "text_prompts[{$i}][text]"] = $prompt['text'];
$args[ "text_prompts[{$i}][weight]"] = $prompt['weight'];
}
unset( $args['text_prompts'] );
}
// size => width, height
if ( ! isset( $args['width'] ) && ! isset( $args['height'] ) && ! empty( $args['size'] ) ) {
$size = explode( 'x', $args['size'] );
if ( count( $size ) == 2 ) {
$args['width'] = (int)$size[0];
$args['height'] = (int)$size[1];
}
}
unset( $args['size'] );
// n => samples
if ( ! isset( $args['samples'] ) && isset( $args['n'] ) ) {
$args['samples'] = max( 1, min( 10, (int)$args['n'] ) );
unset( $args['n'] );
}
// model => model_id
if ( ! isset( $args['model_id'] ) && isset( $args['model'] ) ) {
$args['model_id'] = $args['model'];
unset( $args['model'] );
}
if ( ! empty( $args['model_id'] ) ) {
$args['model_id'] = str_replace( 'stability-ai/', '', $args['model_id'] );
}
// image => init_image
if ( ! isset( $args['init_image'] ) && isset( $args['image'] ) ) {
$args['init_image'] = $args['image'];
unset( $args['image'] );
}
// Style preset
if ( ! isset( $args['style_preset'] ) && isset( $args['style'] ) ) {
$args['style_preset'] = $args['style'];
unset( $args['style'] );
}
// diffusion_steps => steps
if ( ! isset( $args['steps'] ) && isset( $args['diffusion_steps'] ) ) {
$args['steps'] = $args['diffusion_steps'];
unset( $args['diffusion_steps'] );
}
return $args;
}
/**
* Get a list of available models
*
* @access public
*
* @param array $args Query arguments
*
* @return array Response from the API
*/
public function list_models( $args = array(), $type = 'PICTURE' ) {
$args = array_merge( array(
'token' => $this->get_token(),
), $args );
// Prepare arguments for SD API format
$args = $this->prepare_args( $args );
unset( $args['text_prompts'] );
$response = false;
if ( ! empty( $args['key'] ) ) {
$api = $this->get_api( $args['key'] );
$response = $api->listModels( $args );
if ( is_array( $response ) ) {
if ( ! empty( $type ) && $type != 'all' && is_array( $response ) ) {
foreach( $response as $k => $v ) {
if ( ! empty( $v['type'] ) && strpos( $v['type'], $type ) === false ) {
unset( $response[ $k ] );
}
}
}
} else {
$response = false;
}
}
return $response;
}
/**
* Generate images via API
*
* @access public
*
* @param array $args Query arguments
*
* @return array Response from the API
*/
public function generate_images( $args = array() ) {
$args = array_merge( array(
'token' => $this->get_token(),
'prompt' => '',
'size' => '1024x1024',
'n' => 1,
'model' => $this->get_default_model(),
'steps' => (int)$this->get_diffusion_steps(),
'cfg_scale' => (float)$this->get_cfg_scale()
), $args );
// Save a model name for the log
$model = str_replace( 'stability-ai/', '', ! empty( $args['model'] ) ? $args['model'] : $this->get_default_model() );
$args_orig = $args;
// Prepare arguments for SD API format
$args = $this->prepare_args( $args );
$response = false;
if ( ! empty( $args['key'] ) && ! empty( $args['text_prompts'] ) ) {
$api = $this->get_api( $args['key'] );
$response = $api->textToImage( $args );
if ( is_array( $response ) ) {
$this->logger->log( $response, $model, $args_orig, $this->logger_section );
} else {
$response = false;
}
}
return $response;
}
/**
* Make an image variations via API
*
* @access public
*
* @param array $args Query arguments
*
* @return array Response from the API
*/
public function make_variations( $args = array() ) {
$args = array_merge( array(
'token' => $this->get_token(),
'prompt' => '',
'image' => '',
'size' => '1024x1024',
'n' => 1,
'model' => $this->get_default_model(),
'steps' => (int)$this->get_diffusion_steps(),
'cfg_scale' => (float)$this->get_cfg_scale()
), $args );
// Save a model name for the log
$model = str_replace( 'stability-ai/', '', ! empty( $args['model'] ) ? $args['model'] : $this->get_default_model() );
$args_orig = $args;
if ( empty( $args['prompt'] ) ) {
$args['prompt'] = __( 'Make variations of the image.', 'trx_addons' );
}
// Prepare arguments for SD API format
$args = $this->prepare_args( $args, true );
// Delete unnessesary arguments
unset( $args['width'] ); // Width is leave same as in the init_image
unset( $args['height'] ); // Height is leave same as in the init_image
$response = false;
if ( ! empty( $args['key'] ) && ! empty( $args['init_image'] ) ) {
$api = $this->get_api( $args['key'] );
$response = $api->imageToImage( $args );
if ( is_array( $response ) ) {
$this->logger->log( $response, $model, $args_orig, $this->logger_section );
} else {
$response = false;
}
}
return $response;
}
/**
* Upscale an image via API
*
* @access public
*
* @param array $args Query arguments
*
* @return array Response from the API
*/
public function upscale( $args = array() ) {
$args = array_merge( array(
'token' => $this->get_token(),
'prompt' => '',
'image' => '',
'n' => 1,
'model' => '',
'steps' => (int)$this->get_diffusion_steps(),
'cfg_scale' => (float)$this->get_cfg_scale()
), $args );
// Save a model name for the log
$model = str_replace( 'stability-ai/', '', ! empty( $args['model'] ) ? $args['model'] : 'stability-ai/upscale-stable-diffusion-x4-latent-upscaler' );
$args_orig = $args;
if ( empty( $args['prompt'] ) ) {
$args['prompt'] = __( 'Upscale the image.', 'trx_addons' );
}
// Prepare arguments for SD API format
$args = $this->prepare_args( $args, true );
unset( $args['model'] );
unset( $args['model_id'] );
$upscalers = Lists::get_stability_ai_upscalers();
if ( ! empty( $upscalers[ $model ]['model_id'] ) ) {
$args['model_id'] = $upscalers[ $model ]['model_id'];
}
// Delete unnessesary arguments
if ( $args['width'] > 0 ) {
unset( $args['height'] );
} else if ( $args['height'] > 0 ) {
unset( $args['width'] );
}
unset( $args['scale'] );
unset( $args['samples'] );
if ( ! empty( $args['model_id'] ) ) {
$allowed_args = apply_filters( 'trx_addons_filter_ai_helper_upscaler_args', array( 'model_id', 'key', 'init_image', 'width', 'height' ), $args, 'stability-ai' );
foreach ( $args as $k => $v ) {
if ( ! in_array( $k, $allowed_args ) ) {
unset( $args[ $k ] );
}
}
}
$response = false;
if ( ! empty( $args['key'] ) && ! empty( $args['init_image'] ) ) {
$api = $this->get_api( $args['key'] );
$response = $api->imageUpscale( $args );
if ( is_array( $response ) ) {
$this->logger->log( $response, $model, $args_orig, $this->logger_section );
} else {
$response = false;
}
}
return $response;
}
}