anthropic.php
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1 year ago
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anthropic.php
514 lines
| 1 | <?php |
| 2 | |
| 3 | class Meow_MWAI_Engines_Anthropic extends Meow_MWAI_Engines_OpenAI |
| 4 | { |
| 5 | // Streaming |
| 6 | protected $streamInTokens = null; |
| 7 | protected $streamOutTokens = null; |
| 8 | protected $streamBlocks; |
| 9 | protected $streamIsThinking = false; |
| 10 | |
| 11 | public function __construct( $core, $env ) |
| 12 | { |
| 13 | parent::__construct( $core, $env ); |
| 14 | } |
| 15 | |
| 16 | public function reset_stream() { |
| 17 | $this->streamContent = null; |
| 18 | $this->streamBuffer = null; |
| 19 | $this->streamFunctionCall = null; |
| 20 | $this->streamToolCalls = []; |
| 21 | $this->streamLastMessage = null; |
| 22 | $this->streamInTokens = null; |
| 23 | $this->streamOutTokens = null; |
| 24 | $this->streamIsThinking = false; |
| 25 | |
| 26 | $this->streamBlocks = [ |
| 27 | 'role' => 'assistant', |
| 28 | 'content' => [] |
| 29 | ]; |
| 30 | |
| 31 | $this->inModel = null; |
| 32 | $this->inId = null; |
| 33 | } |
| 34 | |
| 35 | protected function set_environment() { |
| 36 | $env = $this->env; |
| 37 | $this->apiKey = $env['apikey']; |
| 38 | } |
| 39 | |
| 40 | protected function build_url( $query, $endpoint = null ) { |
| 41 | $endpoint = apply_filters( 'mwai_anthropic_endpoint', 'https://api.anthropic.com/v1', $this->env ); |
| 42 | if ( $query instanceof Meow_MWAI_Query_Text || $query instanceof Meow_MWAI_Query_Feedback ) { |
| 43 | $url = trailingslashit( $endpoint ) . 'messages'; |
| 44 | } |
| 45 | else { |
| 46 | throw new Exception( 'AI Engine: Unsupported query type.' ); |
| 47 | } |
| 48 | return $url; |
| 49 | } |
| 50 | |
| 51 | protected function build_headers( $query ) { |
| 52 | parent::build_headers( $query ); |
| 53 | $headers = array( |
| 54 | 'Content-Type' => 'application/json', |
| 55 | 'x-api-key' => $this->apiKey, |
| 56 | 'anthropic-version' => '2023-06-01', |
| 57 | 'anthropic-beta' => 'tools-2024-04-04, pdfs-2024-09-25', |
| 58 | 'User-Agent' => 'AI Engine', |
| 59 | ); |
| 60 | return $headers; |
| 61 | } |
| 62 | |
| 63 | public function final_checks( Meow_MWAI_Query_Base $query ) { |
| 64 | // We skip this completely. |
| 65 | // maxMessages is handed in build_messages(). |
| 66 | } |
| 67 | |
| 68 | protected function build_messages( $query ) { |
| 69 | $messages = []; |
| 70 | |
| 71 | // Then, if any, we need to add the 'messages', they are already formatted. |
| 72 | foreach ( $query->messages as $message ) { |
| 73 | $messages[] = $message; |
| 74 | } |
| 75 | |
| 76 | // Handle the maxMessages |
| 77 | if ( !empty( $query->maxMessages ) ) { |
| 78 | $messages = array_slice( $messages, -$query->maxMessages ); |
| 79 | } |
| 80 | |
| 81 | // If the first message is not a 'user' role, we remove it. |
| 82 | if ( !empty( $messages ) && $messages[0]['role'] !== 'user' ) { |
| 83 | array_shift( $messages ); |
| 84 | } |
| 85 | |
| 86 | if ( $query->attachedFile ) { |
| 87 | // https://docs.anthropic.com/claude/reference/messages-examples#vision |
| 88 | // Claude only supports image/jpeg, image/png, image/gif, and image/webp media types. |
| 89 | $mime = $query->attachedFile->get_mimeType(); |
| 90 | // Claude only supports upload by data (base64), not by URL. |
| 91 | $data = $query->attachedFile->get_base64(); |
| 92 | $message = $query->get_message(); |
| 93 | $isPDF = $mime === 'application/pdf'; |
| 94 | $isIMG = in_array( $mime, [ 'image/jpeg', 'image/png', 'image/gif', 'image/webp' ] ); |
| 95 | |
| 96 | if ( $isPDF ) { |
| 97 | if ( empty( $message ) ) { |
| 98 | // Claude doesn't support messages with only PDFs, so we add a text message. |
| 99 | $message = "I uploaded a PDF. Do not consider this message as part of the conversation."; |
| 100 | } |
| 101 | $messages[] = [ |
| 102 | 'role' => 'user', |
| 103 | 'content' => [ |
| 104 | [ |
| 105 | "type" => "text", |
| 106 | "text" => $message |
| 107 | ], |
| 108 | [ |
| 109 | "type" => "document", |
| 110 | "source" => [ |
| 111 | "type" => "base64", |
| 112 | "media_type" => "application/pdf", |
| 113 | "data" => $data |
| 114 | ] |
| 115 | ] |
| 116 | ] |
| 117 | ]; |
| 118 | } |
| 119 | else if ( $isIMG ) { |
| 120 | if ( empty( $message ) ) { |
| 121 | // Claude doesn't support messages with only images, so we add a text message. |
| 122 | $message = "I uploaded an image. Do not consider this message as part of the conversation."; |
| 123 | } |
| 124 | $messages[] = [ |
| 125 | 'role' => 'user', |
| 126 | 'content' => [ |
| 127 | [ |
| 128 | "type" => "text", |
| 129 | "text" => $message |
| 130 | ], |
| 131 | [ |
| 132 | "type" => "image", |
| 133 | "source" => [ |
| 134 | "type" => "base64", |
| 135 | "media_type" => $mime, |
| 136 | "data" => $data |
| 137 | ] |
| 138 | ] |
| 139 | ] |
| 140 | ]; |
| 141 | } |
| 142 | } |
| 143 | else { |
| 144 | $messages[] = [ 'role' => 'user', 'content' => $query->get_message() ]; |
| 145 | } |
| 146 | |
| 147 | return $messages; |
| 148 | } |
| 149 | |
| 150 | // Define a function to recursively replace empty arrays with empty stdClass objects |
| 151 | // To avoid errors with OpenAI's API |
| 152 | private function replaceEmptyArrayWithObject( $item ) { |
| 153 | if ( is_array( $item ) ) { |
| 154 | if ( empty( $item ) ) { |
| 155 | return new stdClass(); // Replace empty array with empty object |
| 156 | } |
| 157 | foreach ( $item as $key => $value ) { |
| 158 | $item[$key] = $this->replaceEmptyArrayWithObject( $value ); // Recurse |
| 159 | } |
| 160 | } |
| 161 | return $item; |
| 162 | } |
| 163 | |
| 164 | protected function build_body( $query, $streamCallback = null, $extra = null ) { |
| 165 | if ( $query instanceof Meow_MWAI_Query_Feedback ) { |
| 166 | $body = array( |
| 167 | "model" => $query->model, |
| 168 | "max_tokens" => $query->maxTokens, |
| 169 | "temperature" => $query->temperature, |
| 170 | "stream" => !is_null( $streamCallback ), |
| 171 | "messages" => [] |
| 172 | ); |
| 173 | |
| 174 | if ( !empty( $query->instructions ) ) { |
| 175 | $body['system'] = $query->instructions; |
| 176 | } |
| 177 | |
| 178 | // Build the messages |
| 179 | $body['messages'][] = [ 'role' => 'user', 'content' => $query->message ]; |
| 180 | |
| 181 | if ( !empty( $query->blocks ) ) { |
| 182 | foreach ( $query->blocks as $feedback_block ) { |
| 183 | $contentBlock = $feedback_block['rawMessage']['content']; |
| 184 | $assistantMessageIndex = count($body['messages']); |
| 185 | $body['messages'][] = [ |
| 186 | 'role' => 'assistant', |
| 187 | 'content' => $contentBlock |
| 188 | ]; |
| 189 | |
| 190 | foreach ( $feedback_block['feedbacks'] as $feedback ) { |
| 191 | $feedbackValue = $feedback['reply']['value']; |
| 192 | if ( !is_string( $feedbackValue ) ) { |
| 193 | $feedbackValue = json_encode( $feedbackValue ); |
| 194 | } |
| 195 | |
| 196 | // Check for the tool_use message and make sure input is not null. |
| 197 | foreach ( $body['messages'][$assistantMessageIndex]['content'] as &$message ) { |
| 198 | if ( $message['type'] === 'tool_use' && $message['id'] === $feedback['request']['toolId'] ) { |
| 199 | if ( empty( $message['input'] ) ) { |
| 200 | $message['input'] = new stdClass(); |
| 201 | } |
| 202 | break; |
| 203 | } |
| 204 | } |
| 205 | unset( $message ); |
| 206 | |
| 207 | // Add a new message with tool_result if tool_use. |
| 208 | $body['messages'][] = [ |
| 209 | 'role' => 'user', |
| 210 | 'content' => [ |
| 211 | [ |
| 212 | 'type' => 'tool_result', |
| 213 | 'tool_use_id' => $feedback['request']['toolId'], |
| 214 | 'content' => $feedbackValue, |
| 215 | 'is_error' => false // Cool, Anthropic supports errors! |
| 216 | ] |
| 217 | ] |
| 218 | ]; |
| 219 | } |
| 220 | } |
| 221 | } |
| 222 | |
| 223 | // TODO: This WAS COPIED FROM BELOW |
| 224 | // Support for functions |
| 225 | if ( !empty( $query->functions ) ) { |
| 226 | $model = $this->retrieve_model_info( $query->model ); |
| 227 | if ( !empty( $model['tags'] ) && !in_array( 'functions', $model['tags'] ) ) { |
| 228 | Meow_MWAI_Logging::warn( 'The model "' . $query->model . '" doesn\'t support Function Calling.' ); |
| 229 | } |
| 230 | else { |
| 231 | $body['tools'] = []; |
| 232 | // Dynamic function: they will interactively enhance the completion (tools). |
| 233 | foreach ( $query->functions as $function ) { |
| 234 | $body['tools'][] = $function->serializeForAnthropic(); |
| 235 | } |
| 236 | // Static functions: they will be executed at the end of the completion. |
| 237 | //$body['function_call'] = $query->functionCall; |
| 238 | } |
| 239 | } |
| 240 | |
| 241 | // To avoid errors with Anthropic's API, we need to replace empty arrays with empty objects |
| 242 | $body = $this->replaceEmptyArrayWithObject( $body ); |
| 243 | return $body; |
| 244 | } |
| 245 | else if ( $query instanceof Meow_MWAI_Query_Text ) { |
| 246 | $body = array( |
| 247 | "model" => $query->model, |
| 248 | "stream" => !is_null( $streamCallback ), |
| 249 | ); |
| 250 | |
| 251 | if ( !empty( $query->maxTokens ) ) { |
| 252 | $body['max_tokens'] = $query->maxTokens; |
| 253 | } |
| 254 | else { |
| 255 | // https://docs.anthropic.com/en/docs/about-claude/models#model-comparison-table |
| 256 | $body['max_tokens'] = 4096; |
| 257 | } |
| 258 | |
| 259 | if ( !empty( $query->temperature ) ) { |
| 260 | $body['temperature'] = $query->temperature; |
| 261 | } |
| 262 | |
| 263 | if ( !empty( $query->stop ) ) { |
| 264 | $body['stop'] = $query->stop; |
| 265 | } |
| 266 | |
| 267 | // First, we need to add the first message (the instructions). |
| 268 | if ( !empty( $query->instructions ) ) { |
| 269 | $body['system'] = $query->instructions; |
| 270 | } |
| 271 | |
| 272 | // If there is a context, we need to add it. |
| 273 | if ( !empty( $query->context ) ) { |
| 274 | if ( empty( $body['system'] ) ) { |
| 275 | $body['system'] = ""; |
| 276 | } |
| 277 | $body['system'] = empty( $body['system'] ) ? '' : $body['system'] . "\n\n"; |
| 278 | $body['system'] = $body['system'] . "Context:\n\n" . $query->context; |
| 279 | } |
| 280 | |
| 281 | // Support for functions |
| 282 | if ( !empty( $query->functions ) ) { |
| 283 | $model = $this->retrieve_model_info( $query->model ); |
| 284 | if ( !empty( $model['tags'] ) && !in_array( 'functions', $model['tags'] ) ) { |
| 285 | Meow_MWAI_Logging::warn( 'The model "' . $query->model . '" doesn\'t support Function Calling.' ); |
| 286 | } |
| 287 | else { |
| 288 | $body['tools'] = []; |
| 289 | // Dynamic function: they will interactively enhance the completion (tools). |
| 290 | foreach ( $query->functions as $function ) { |
| 291 | $body['tools'][] = $function->serializeForAnthropic(); |
| 292 | } |
| 293 | // Static functions: they will be executed at the end of the completion. |
| 294 | //$body['function_call'] = $query->functionCall; |
| 295 | } |
| 296 | } |
| 297 | |
| 298 | $body['messages'] = $this->build_messages( $query ); |
| 299 | return $body; |
| 300 | } |
| 301 | else { |
| 302 | throw new Exception( 'AI Engine: Unsupported query type.' ); |
| 303 | } |
| 304 | } |
| 305 | |
| 306 | protected function stream_data_handler( $json ) { |
| 307 | $content = null; |
| 308 | $type = !empty( $json['type'] ) ? $json['type'] : null; |
| 309 | if ( is_null( $type ) ) { |
| 310 | return $content; |
| 311 | } |
| 312 | |
| 313 | if ( $type === 'message_start' ) { |
| 314 | $usage = $json['message']['usage']; |
| 315 | $this->streamInTokens = $usage['input_tokens']; |
| 316 | $this->inModel = $json['message']['model']; |
| 317 | $this->inId = $json['message']['id']; |
| 318 | } |
| 319 | else if ( $type === 'content_block_start' ) { |
| 320 | $this->streamBlocks['content'][] = $json['content_block']; |
| 321 | } |
| 322 | else if ( $type === 'content_block_delta' ) { |
| 323 | $index = $json['index']; |
| 324 | $block = $this->streamBlocks['content'][$index]; |
| 325 | if ( $json['delta']['type'] === 'text_delta' ) { |
| 326 | $block['text'] .= $json['delta']['text']; |
| 327 | if ( strpos( $block['text'], '<thinking' ) === 0 ) { |
| 328 | $this->streamIsThinking = true; |
| 329 | } |
| 330 | if ( strpos( $block['text'], '</thinking>' ) === 0 ) { |
| 331 | $this->streamIsThinking = false; |
| 332 | } |
| 333 | $content = $json['delta']['text']; |
| 334 | } |
| 335 | else if ( $json['delta']['type'] === 'input_json_delta' ) { |
| 336 | // Somehow, the input is set as an array, but it should be a string since it's JSON. |
| 337 | $block['input'] = is_array( $block['input'] ) ? "" : $block['input']; |
| 338 | $block['input'] .= $json['delta']['partial_json']; |
| 339 | } |
| 340 | $this->streamBlocks['content'][$index] = $block; |
| 341 | } |
| 342 | // At the end of a block, let's look for any 'input' not yet decoded from JSON |
| 343 | else if ( $type === 'content_block_stop' ) { |
| 344 | $index = $json['index']; |
| 345 | $block = $this->streamBlocks['content'][$index]; |
| 346 | if ( isset( $block['input'] ) && is_string( $block['input'] ) ) { |
| 347 | $block['input'] = json_decode( $block['input'], true ); |
| 348 | } |
| 349 | $this->streamBlocks['content'][$index] = $block; |
| 350 | } |
| 351 | else if ( $type === 'message_delta' ) { |
| 352 | $usage = $json['usage']; |
| 353 | $this->streamOutTokens = $usage['output_tokens']; |
| 354 | } |
| 355 | else if ( $type === 'error' ) { |
| 356 | $error = $json['error']; |
| 357 | $message = $error['message']; |
| 358 | throw new Exception( $message ); |
| 359 | } |
| 360 | |
| 361 | // Avoid some endings |
| 362 | $endings = [ "<|im_end|>", "</s>" ]; |
| 363 | if ( in_array( $content, $endings ) ) { |
| 364 | $content = null; |
| 365 | } |
| 366 | |
| 367 | // If the stream is thinking, we don't want to return anything yet. |
| 368 | if ( $this->streamIsThinking ) { |
| 369 | $content = null; |
| 370 | } |
| 371 | |
| 372 | return ( $content === '0' || !empty( $content ) ) ? $content : null; |
| 373 | } |
| 374 | |
| 375 | // This create the "choices" (even though, often, it is only one choice). |
| 376 | // It is basically the reply, but one that is understood by the Meow_MWAI_Reply class. |
| 377 | public function create_choices( $data ) { |
| 378 | $returned_choices = []; |
| 379 | foreach ( $data['content'] as $content ) { |
| 380 | if ( $content['type'] === 'tool_use' ) { |
| 381 | $returned_choices[] = [ |
| 382 | 'message' => [ |
| 383 | 'tool_calls' => [ |
| 384 | [ |
| 385 | 'id' => $content['id'], |
| 386 | 'type' => 'function', |
| 387 | 'function' => [ |
| 388 | 'name' => $content['name'], |
| 389 | 'arguments' => empty( $content['input'] ) ? new stdClass() : $content['input'], |
| 390 | ] |
| 391 | ] |
| 392 | |
| 393 | ] |
| 394 | ] |
| 395 | ]; |
| 396 | } |
| 397 | else if ( $content['type'] === 'text' ) { |
| 398 | $returned_choices[] = [ |
| 399 | 'message' => [ |
| 400 | 'content' => $content['text'] |
| 401 | ] |
| 402 | ]; |
| 403 | } |
| 404 | } |
| 405 | return $returned_choices; |
| 406 | } |
| 407 | |
| 408 | public function run_completion_query( $query, $streamCallback = null ) : Meow_MWAI_Reply { |
| 409 | $isStreaming = !is_null( $streamCallback ); |
| 410 | |
| 411 | if ( $isStreaming ) { |
| 412 | $this->streamCallback = $streamCallback; |
| 413 | add_action( 'http_api_curl', [ $this, 'stream_handler' ], 10, 3 ); |
| 414 | } |
| 415 | |
| 416 | $this->reset_stream(); |
| 417 | $data = null; |
| 418 | $body = $this->build_body( $query, $streamCallback ); |
| 419 | $url = $this->build_url( $query ); |
| 420 | $headers = $this->build_headers( $query ); |
| 421 | $options = $this->build_options( $headers, $body ); |
| 422 | |
| 423 | try { |
| 424 | $res = $this->run_query( $url, $options, $streamCallback ); |
| 425 | $reply = new Meow_MWAI_Reply( $query ); |
| 426 | $returned_id = null; |
| 427 | $returned_model = null; |
| 428 | $returned_choices = []; |
| 429 | |
| 430 | // Streaming Mode |
| 431 | if ( $isStreaming ) { |
| 432 | $returned_id = $this->inId; |
| 433 | $returned_model = $this->inModel ? $this->inModel : $query->model; |
| 434 | if ( !is_null( $this->streamInTokens && !is_null( $this->streamOutTokens ) ) ) { |
| 435 | $returned_in_tokens = $this->streamInTokens; |
| 436 | $returned_out_tokens = $this->streamOutTokens; |
| 437 | } |
| 438 | $data = $this->streamBlocks; |
| 439 | $returned_choices = $this->create_choices( $this->streamBlocks ); |
| 440 | } |
| 441 | // Standard Mode |
| 442 | else { |
| 443 | $data = $res['data']; |
| 444 | $returned_id = $data['id']; |
| 445 | $returned_model = $data['model']; |
| 446 | $usage = $data['usage']; |
| 447 | if ( !empty( $usage ) ) { |
| 448 | $returned_in_tokens = isset( $usage['input_tokens'] ) ? $usage['input_tokens'] : null; |
| 449 | $returned_out_tokens = isset( $usage['output_tokens'] ) ? $usage['output_tokens'] : null; |
| 450 | } |
| 451 | $returned_choices = $this->create_choices( $data ); |
| 452 | } |
| 453 | |
| 454 | $reply->set_choices( $returned_choices, $data ); |
| 455 | if ( !empty( $returned_id ) ) { |
| 456 | $reply->set_id( $returned_id ); |
| 457 | } |
| 458 | |
| 459 | // Handle tokens. |
| 460 | $this->handle_tokens_usage( $reply, $query, $returned_model, |
| 461 | $returned_in_tokens, $returned_out_tokens |
| 462 | ); |
| 463 | |
| 464 | return $reply; |
| 465 | } |
| 466 | catch ( Exception $e ) { |
| 467 | $error = $e->getMessage(); |
| 468 | $json = json_decode( $error, true ); |
| 469 | if ( json_last_error() === JSON_ERROR_NONE ) { |
| 470 | if ( isset( $json['error'] ) && isset( $json['error']['message'] ) ) { |
| 471 | $error = $json['error']['message']; |
| 472 | } |
| 473 | } |
| 474 | Meow_MWAI_Logging::error( "(Anthropic) " . $error ); |
| 475 | $service = $this->get_service_name(); |
| 476 | $message = "From $service: " . $error; |
| 477 | throw new Exception( $message ); |
| 478 | } |
| 479 | finally { |
| 480 | if ( $isStreaming ) { |
| 481 | remove_action( 'http_api_curl', [ $this, 'stream_handler' ] ); |
| 482 | } |
| 483 | } |
| 484 | } |
| 485 | |
| 486 | protected function get_service_name() { |
| 487 | return "Anthropic"; |
| 488 | } |
| 489 | |
| 490 | public function get_models() { |
| 491 | return apply_filters( 'mwai_anthropic_models', MWAI_ANTHROPIC_MODELS ); |
| 492 | } |
| 493 | |
| 494 | static public function get_models_static() { |
| 495 | return MWAI_ANTHROPIC_MODELS; |
| 496 | } |
| 497 | |
| 498 | public function handle_tokens_usage( $reply, $query, $returned_model, |
| 499 | $returned_in_tokens, $returned_out_tokens, $returned_price = null ) { |
| 500 | $returned_in_tokens = !is_null( $returned_in_tokens ) ? |
| 501 | $returned_in_tokens : $reply->get_in_tokens( $query ); |
| 502 | $returned_out_tokens = !is_null( $returned_out_tokens ) ? |
| 503 | $returned_out_tokens : $reply->get_out_tokens(); |
| 504 | if ( !empty( $reply->id ) ) { |
| 505 | // Would be cool to retrieve the usage from the API, but it's not possible. |
| 506 | } |
| 507 | $usage = $this->core->record_tokens_usage( $returned_model, $returned_in_tokens, $returned_out_tokens ); |
| 508 | $reply->set_usage( $usage ); |
| 509 | } |
| 510 | |
| 511 | public function get_price( Meow_MWAI_Query_Base $query, Meow_MWAI_Reply $reply ) { |
| 512 | return parent::get_price( $query, $reply ); |
| 513 | } |
| 514 | } |