| 1 |
<?php |
| 2 |
|
| 3 |
namespace Better_Payment\Lite\AI\Providers; |
| 4 |
|
| 5 |
if ( ! defined( 'ABSPATH' ) ) { |
| 6 |
exit; |
| 7 |
} |
| 8 |
|
| 9 |
/** |
| 10 |
* OpenAI provider (Chat Completions + Images). |
| 11 |
* |
| 12 |
* Also the base for any OpenAI-compatible API (see {@see OpenRouterProvider}), |
| 13 |
* so the endpoint and auth headers are overridable. |
| 14 |
*/ |
| 15 |
class OpenAIProvider extends AbstractProvider { |
| 16 |
|
| 17 |
public function get_id(): string { |
| 18 |
return 'openai'; |
| 19 |
} |
| 20 |
|
| 21 |
public function get_label(): string { |
| 22 |
return 'OpenAI'; |
| 23 |
} |
| 24 |
|
| 25 |
public function get_models(): array { |
| 26 |
return [ 'gpt-4o', 'gpt-4o-mini', 'gpt-4.1', 'gpt-4.1-mini' ]; |
| 27 |
} |
| 28 |
|
| 29 |
public function supports_images(): bool { |
| 30 |
return true; |
| 31 |
} |
| 32 |
|
| 33 |
protected function chat_endpoint(): string { |
| 34 |
return 'https://api.openai.com/v1/chat/completions'; |
| 35 |
} |
| 36 |
|
| 37 |
protected function images_endpoint(): string { |
| 38 |
return 'https://api.openai.com/v1/images/generations'; |
| 39 |
} |
| 40 |
|
| 41 |
/** |
| 42 |
* @return array<string, string> |
| 43 |
*/ |
| 44 |
protected function auth_headers(): array { |
| 45 |
return [ 'Authorization' => 'Bearer ' . sanitize_text_field( (string) $this->config['api_key'] ) ]; |
| 46 |
} |
| 47 |
|
| 48 |
public function chat( array $messages, array $options = [] ): array { |
| 49 |
list( $system, $turns ) = self::split_system( $messages, (string) ( $options['system'] ?? '' ) ); |
| 50 |
|
| 51 |
$payload_messages = []; |
| 52 |
if ( '' !== $system ) { |
| 53 |
$payload_messages[] = [ 'role' => 'system', 'content' => $system ]; |
| 54 |
} |
| 55 |
foreach ( $turns as $turn ) { |
| 56 |
$payload_messages[] = $turn; |
| 57 |
} |
| 58 |
|
| 59 |
$body = [ |
| 60 |
'model' => $this->resolve_model( $options ), |
| 61 |
'messages' => $payload_messages, |
| 62 |
'temperature' => $this->temperature( $options ), |
| 63 |
'max_tokens' => $this->max_tokens( $options ), |
| 64 |
]; |
| 65 |
|
| 66 |
if ( ! empty( $options['tools'] ) ) { |
| 67 |
$body['tools'] = $this->format_tools( $options['tools'] ); |
| 68 |
$body['tool_choice'] = 'required' === ( $options['tool_choice'] ?? '' ) ? 'required' : 'auto'; |
| 69 |
} |
| 70 |
|
| 71 |
$result = $this->post_json( $this->chat_endpoint(), $this->auth_headers(), $body ); |
| 72 |
if ( ! $result['ok'] ) { |
| 73 |
return [ 'text' => '', 'tool_calls' => [], 'usage' => [], 'error' => $result['error'], 'raw' => $result['data'] ]; |
| 74 |
} |
| 75 |
|
| 76 |
return $this->normalize_chat( $result['data'] ); |
| 77 |
} |
| 78 |
|
| 79 |
/** |
| 80 |
* Map provider-agnostic tool descriptors to OpenAI function tools. |
| 81 |
* |
| 82 |
* @param array $tools |
| 83 |
* @return array |
| 84 |
*/ |
| 85 |
protected function format_tools( array $tools ): array { |
| 86 |
$out = []; |
| 87 |
foreach ( $tools as $tool ) { |
| 88 |
$out[] = [ |
| 89 |
'type' => 'function', |
| 90 |
'function' => [ |
| 91 |
'name' => $tool['name'], |
| 92 |
'description' => $tool['description'] ?? '', |
| 93 |
'parameters' => self::params_to_json_schema( $tool['params'] ?? [] ), |
| 94 |
], |
| 95 |
]; |
| 96 |
} |
| 97 |
return $out; |
| 98 |
} |
| 99 |
|
| 100 |
/** |
| 101 |
* @param mixed $data |
| 102 |
* @return array |
| 103 |
*/ |
| 104 |
protected function normalize_chat( $data ): array { |
| 105 |
$message = $data['choices'][0]['message'] ?? []; |
| 106 |
$text = (string) ( $message['content'] ?? '' ); |
| 107 |
$tool_calls = []; |
| 108 |
|
| 109 |
foreach ( (array) ( $message['tool_calls'] ?? [] ) as $call ) { |
| 110 |
if ( ! isset( $call['function']['name'] ) ) { |
| 111 |
continue; |
| 112 |
} |
| 113 |
$tool_calls[] = [ |
| 114 |
'name' => (string) $call['function']['name'], |
| 115 |
'arguments' => self::decode_arguments( $call['function']['arguments'] ?? [] ), |
| 116 |
]; |
| 117 |
} |
| 118 |
|
| 119 |
return [ |
| 120 |
'text' => $text, |
| 121 |
'tool_calls' => $tool_calls, |
| 122 |
'usage' => $data['usage'] ?? [], |
| 123 |
'error' => null, |
| 124 |
'raw' => $data, |
| 125 |
]; |
| 126 |
} |
| 127 |
|
| 128 |
public function generate_image( string $prompt, array $options = [] ): array { |
| 129 |
$model = ! empty( $options['model'] ) ? (string) $options['model'] |
| 130 |
: ( ! empty( $this->config['image_model'] ) ? (string) $this->config['image_model'] : 'gpt-image-1' ); |
| 131 |
|
| 132 |
$body = [ |
| 133 |
'model' => $model, |
| 134 |
'prompt' => $prompt, |
| 135 |
'size' => (string) ( $options['size'] ?? '1024x1024' ), |
| 136 |
'n' => 1, |
| 137 |
]; |
| 138 |
|
| 139 |
$result = $this->post_json( $this->images_endpoint(), $this->auth_headers(), $body, 120 ); |
| 140 |
if ( ! $result['ok'] ) { |
| 141 |
return [ 'error' => $result['error'] ]; |
| 142 |
} |
| 143 |
|
| 144 |
$item = $result['data']['data'][0] ?? []; |
| 145 |
if ( ! empty( $item['b64_json'] ) ) { |
| 146 |
return [ 'b64' => (string) $item['b64_json'], 'mime' => 'image/png', 'error' => null ]; |
| 147 |
} |
| 148 |
if ( ! empty( $item['url'] ) ) { |
| 149 |
return [ 'url' => (string) $item['url'], 'error' => null ]; |
| 150 |
} |
| 151 |
return [ 'error' => __( 'Image provider returned no image.', 'better-payment' ) ]; |
| 152 |
} |
| 153 |
} |
| 154 |
|
