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paulinevospaulinevos
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Create Responses normalizers for message types
To migrate from OpenAI's chat completions to Responses, we need to change incoming messages to the updated data structure
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‎src/platform/src/Bridge/OpenAi/Contract/Gpt/Message/AssistantMessageNormalizer.php‎

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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <[email protected]>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\AI\Platform\Bridge\OpenAi\Contract\Gpt\Message;
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use Symfony\AI\Platform\Bridge\OpenAi\Gpt;
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use Symfony\AI\Platform\Contract\Normalizer\ModelContractNormalizer;
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use Symfony\AI\Platform\Message\AssistantMessage;
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use Symfony\AI\Platform\Model;
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use Symfony\Component\Serializer\Normalizer\NormalizerAwareInterface;
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use Symfony\Component\Serializer\Normalizer\NormalizerAwareTrait;
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/**
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* @author Guillermo Lengemann <[email protected]>
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*/
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final class AssistantMessageNormalizer extends ModelContractNormalizer implements NormalizerAwareInterface
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{
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use NormalizerAwareTrait;
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/**
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* @param AssistantMessage $data
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*
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* @return array{
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* role: 'assistant',
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* type: 'message',
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* content: ?string
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* }
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*/
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public function normalize(mixed $data, ?string $format = null, array $context = []): array
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{
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if ($data->hasToolCalls()) {
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return $this->normalizer->normalize($data->getToolCalls(), $format, $context);
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}
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return [
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'role' => $data->getRole()->value,
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'type' => 'message',
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'content' => $data->getContent(),
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];
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}
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protected function supportedDataClass(): string
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{
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return AssistantMessage::class;
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}
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protected function supportsModel(Model $model): bool
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{
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return $model instanceof Gpt;
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}
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}

‎src/platform/src/Bridge/OpenAi/Contract/Gpt/Message/MessageBagNormalizer.php‎

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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <[email protected]>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\AI\Platform\Bridge\OpenAi\Contract\Gpt\Message;
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use Symfony\AI\Platform\Bridge\OpenAi\Gpt;
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use Symfony\AI\Platform\Contract\Normalizer\ModelContractNormalizer;
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use Symfony\AI\Platform\Message\AssistantMessage;
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use Symfony\AI\Platform\Message\MessageBag;
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use Symfony\AI\Platform\Model;
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use Symfony\Component\Serializer\Exception\ExceptionInterface;
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use Symfony\Component\Serializer\Normalizer\NormalizerAwareInterface;
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use Symfony\Component\Serializer\Normalizer\NormalizerAwareTrait;
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/**
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* @author Pauline Vos <[email protected]>
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*/
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final class MessageBagNormalizer extends ModelContractNormalizer implements NormalizerAwareInterface
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{
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use NormalizerAwareTrait;
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/**
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* @param MessageBag $data
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*
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* @return array{
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* input: array<string, mixed>,
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* model?: string,
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* system?: string,
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* }
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*
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* @throws ExceptionInterface
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*/
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public function normalize(mixed $data, ?string $format = null, array $context = []): array
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{
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$messages['input'] = [];
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foreach ($data->withoutSystemMessage()->getMessages() as $message) {
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$normalized = $this->normalizer->normalize($message, $format, $context);
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if ($message instanceof AssistantMessage && $message->hasToolCalls()) {
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$messages['input'] = array_merge($messages['input'], $normalized);
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continue;
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}
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$messages['input'][] = $normalized;
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}
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if ($data->getSystemMessage()) {
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$messages['instructions'] = $data->getSystemMessage()->getContent();
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}
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return $messages;
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}
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protected function supportedDataClass(): string
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{
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return MessageBag::class;
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}
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protected function supportsModel(Model $model): bool
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{
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return $model instanceof Gpt;
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}
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}

‎src/platform/src/Bridge/OpenAi/Contract/Gpt/Message/ToolCallMessageNormalizer.php‎

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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <[email protected]>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\AI\Platform\Bridge\OpenAi\Contract\Gpt\Message;
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use Symfony\AI\Platform\Bridge\OpenAi\Gpt;
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use Symfony\AI\Platform\Contract\Normalizer\ModelContractNormalizer;
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use Symfony\AI\Platform\Message\ToolCallMessage;
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use Symfony\AI\Platform\Model;
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use Symfony\Component\Serializer\Normalizer\NormalizerAwareTrait;
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/**
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* @author Christopher Hertel <[email protected]>
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*/
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final class ToolCallMessageNormalizer extends ModelContractNormalizer
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{
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use NormalizerAwareTrait;
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/**
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* @param ToolCallMessage $data
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*
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* @return array{
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* type: 'function_call_output',
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* call_id: string,
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* output: string
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* }
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*/
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public function normalize(mixed $data, ?string $format = null, array $context = []): array
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{
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return [
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'type' => 'function_call_output',
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'call_id' => $data->getToolCall()->getId(),
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'output' => $data->getContent(),
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];
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}
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protected function supportedDataClass(): string
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{
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return ToolCallMessage::class;
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}
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protected function supportsModel(Model $model): bool
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{
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return $model instanceof Gpt;
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}
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}

‎src/platform/src/Message/MessageBag.php‎

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return null;
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}
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/**
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* @return AssistantMessage[]
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*/
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public function getAssistantMessages(): array
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{
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return array_filter($this->messages, function (MessageInterface $message) {
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return $message instanceof AssistantMessage;
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});
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}
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public function getUserMessage(): ?UserMessage
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{
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foreach ($this->messages as $message) {
@@ -92,6 +102,39 @@ public function withoutSystemMessage(): self
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return $messages;
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}
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/**
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* @return ToolCallMessage[]
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*/
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public function getToolCallMessages(): array
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{
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return array_filter(
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$this->messages,
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static fn (MessageInterface $message) => $message instanceof ToolCallMessage,
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);
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}
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public function withoutToolCallMessages(): self
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{
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$messages = clone $this;
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$messages->messages = array_values(array_filter(
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$messages->messages,
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static fn (MessageInterface $message) => !$message instanceof ToolCallMessage,
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));
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return $messages;
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}
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public function withoutAssistantMessages(): self
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{
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$messages = clone $this;
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$messages->messages = array_values(array_filter(
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$messages->messages,
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static fn (MessageInterface $message) => !$message instanceof AssistantMessage,
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));
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return $messages;
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}
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public function prepend(MessageInterface $message): self
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{
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$messages = clone $this;

‎src/platform/tests/Bridge/OpenAi/Contract/Gpt/Message/AssistantMessageNormalizerTest.php‎

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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <[email protected]>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\AI\Platform\Tests\Bridge\OpenAi\Contract\Gpt\Message;
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use PHPUnit\Framework\Attributes\DataProvider;
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use PHPUnit\Framework\TestCase;
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use Symfony\AI\Platform\Bridge\Gemini\Gemini;
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use Symfony\AI\Platform\Bridge\OpenAi\Contract\Gpt\Message\AssistantMessageNormalizer;
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use Symfony\AI\Platform\Bridge\OpenAi\Contract\Gpt\ToolCallNormalizer;
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use Symfony\AI\Platform\Bridge\OpenAi\Gpt;
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use Symfony\AI\Platform\Contract;
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use Symfony\AI\Platform\Message\AssistantMessage;
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use Symfony\AI\Platform\Message\Content\Text;
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use Symfony\AI\Platform\Message\Message;
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use Symfony\AI\Platform\Model;
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use Symfony\AI\Platform\Result\ToolCall;
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use Symfony\Component\Serializer\Serializer;
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class AssistantMessageNormalizerTest extends TestCase
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{
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#[DataProvider('normalizeProvider')]
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public function testNormalize(AssistantMessage $message, array $expected)
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{
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$normalizer = new AssistantMessageNormalizer();
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$normalizer->setNormalizer(new Serializer([new ToolCallNormalizer()]));
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$actual = $normalizer->normalize($message, null, [Contract::CONTEXT_MODEL => new Gpt('o3')]);
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$this->assertEquals($expected, $actual);
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}
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public static function normalizeProvider(): \Generator
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{
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$message = Message::ofAssistant('Foo');
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yield 'without tool calls' => [
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$message,
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[
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'role' => 'assistant',
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'type' => 'message',
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'content' => 'Foo',
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],
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];
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$toolCall = new ToolCall('some-id', 'roll-die', ['sides' => 24]);
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yield 'with tool calls' => [
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Message::ofAssistant(null, [$toolCall]),
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[
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[
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'arguments' => json_encode($toolCall->getArguments()),
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'call_id' => $toolCall->getId(),
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'name' => $toolCall->getName(),
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'type' => 'function_call',
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],
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],
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];
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}
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#[DataProvider('supportsNormalizationProvider')]
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public function testSupportsNormalization(mixed $data, Model $model, bool $expected)
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{
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$this->assertSame(
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$expected,
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(new AssistantMessageNormalizer())->supportsNormalization($data, null, [Contract::CONTEXT_MODEL => $model])
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);
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}
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public static function supportsNormalizationProvider(): \Generator
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{
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$assistantMessage = Message::ofAssistant('Foo');
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$gpt = new Gpt('o3');
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yield 'supported' => [$assistantMessage, $gpt, true];
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yield 'unsupported model' => [$assistantMessage, new Gemini('foo'), false];
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yield 'unsupported data' => [new Text('foo'), $gpt, false];
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}
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}

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