AbstractOpenAiCompatibleTextGenerationModel::prepareMessagesParam( WordPress\AiClient\Providers\OpenAiCompatibleImplementation\list<Message> $messages, string|null $systemInstruction = null ): WordPress\AiClient\Providers\OpenAiCompatibleImplementation\list<array<string,

170    protected function prepareMessagesParam(array $messages, ?string $systemInstruction = null): array171    {172        $messagesParam = array_map(function (Message $message): array {173            // Special case: Function response.174            $messageParts = $message->getParts();175            if (count($messageParts) === 1 && $messageParts[0]->getType()->isFunctionResponse()) {176                $functionResponse = $messageParts[0]->getFunctionResponse();177                if (!$functionResponse) {178                    // This should be impossible due to class internals, but still needs to be checked.179                    throw new RuntimeException('The function response typed message part must contain a function response.');180                }181                return ['role' => 'tool', 'content' => json_encode($functionResponse->getResponse()), 'tool_call_id' => $functionResponse->getId()];182            }183            $messageData = ['role' => $this->getMessageRoleString($message->getRole()), 'content' => array_values(array_filter(array_map([$this, 'getMessagePartContentData'], $messageParts)))];184            // Only include tool_calls if there are any (OpenAI rejects empty arrays).185            $toolCalls = array_values(array_filter(array_map([$this, 'getMessagePartToolCallData'], $messageParts)));186            if (!empty($toolCalls)) {187                $messageData['tool_calls'] = $toolCalls;188            }189            return $messageData;190        }, $messages);191        if ($systemInstruction) {192            array_unshift($messagesParam, [193                /*194                 * TODO: Replace this with 'developer' in the future.195                 * See https://platform.openai.com/docs/api-reference/chat/create#chat_create-messages196                 */197                'role' => 'system',198                'content' => [['type' => 'text', 'text' => $systemInstruction]],199            ]);200        }201        return $messagesParam;202    }