Eduardo Lopes - Conclusão do desafio

[elopes-sv]

Contexto

Implementa a API REST de conversão de moedas do desafio.

O que foi feito

• adiciona o front controller em src/index.php
• cria ExchangeRequest para representar os dados validados da rota
• cria ExchangeRequestFactory para validar e extrair /exchange/{amount}/{from}/{to}/{rate}
• cria ExchangeService para aplicar a regra de conversão e definir o símbolo da moeda
• cria JsonResponse para centralizar a resposta JSON
• cria BadRequestException para tratar requisições inválidas com status 400

Como validar

• subir o servidor: php -S localhost:8000 src/index.php
• acessar no navegador ou via HTTP:
  • http://localhost:8000/exchange/10/BRL/USD/4.50
• rodar testes: composer test
• rodar lint: composer lint

Evidências

Validação manual

Testes automatizados

Lint

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Avoid binary float artifacts in monetary conversion

Using direct float multiplication for valorConvertido can produce visibly wrong monetary values for some decimal inputs (for example, 0.1 * 0.2 yields 0.020000000000000004 in PHP), which hurts API accuracy and can break strict client assertions. Since this endpoint returns currency amounts, the result should be normalized to a defined precision (or computed with decimal-safe arithmetic) before serializing the response.

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