AbstractOpenAiCompatibleTextGenerationModel::getMessagePartToolCallData( WordPress\AiClient\Messages\DTO\MessagePart $part ): WordPress\AiClient\Providers\OpenAiCompatibleImplementation\?array<string,

280    protected function getMessagePartToolCallData(MessagePart $part): ?array281    {282        $type = $part->getType();283        if ($type->isFunctionCall()) {284            $functionCall = $part->getFunctionCall();285            if (!$functionCall) {286                // This should be impossible due to class internals, but still needs to be checked.287                throw new RuntimeException('The function call typed message part must contain a function call.');288            }289            $args = $functionCall->getArgs();290            /*291             * Ensure null or empty arrays become empty objects for JSON encoding.292             * While in theory the JSON schema could also dictate a type of293             * 'array', in practice function arguments are typically of type294             * 'object'. More importantly, the OpenAI API specification seems295             * to expect that, and does not support passing arrays as the root296             * value. The null check handles the case where FunctionCall normalizes297             * empty arrays to null.298             */299            if ($args === null || is_array($args) && count($args) === 0) {300                $args = new \stdClass();301            }302            return ['type' => 'function', 'id' => $functionCall->getId(), 'function' => ['name' => $functionCall->getName(), 'arguments' => json_encode($args)]];303        }304        // All other types are handled in `getMessagePartContentData()`.305        return null;306    }