Poka-Yoke in PHP: Guarding Business Operations Before They Run

Описание и применение

Пакет Novora PokaYoke позволяет явно проверять предусловия бизнес‑операций в PHP, собирая все нарушения и выполняя действие только при их отсутствии, улучшая читаемость и поддержку кода.

Задача

Business operations often require multiple independent preconditions; inline checks can hide failures and only report the first missing condition.

Результат

The package provides a concise API to define rules, collect violations, and guard operations, improving clarity and maintainability of business logic.

Рабочий процесс

• Define rule classes implementing Novora\PokaYoke\Rule that return null or a Violation.
• Instantiate Novora\PokaYoke\Guard and call check() with the context and an array of rules.
• If check() returns allowed, proceed with the operation; otherwise handle violations.
• Alternatively, use Guard::execute() to combine checking and callback execution in one step, catching OperationBlocked to access violations.
• Ensure rules are side‑effect free and application decides how to present or translate violation messages.

Доказательства

A separate check followed by an action is useful for displaying diagnostics, but the package also offers a compact operation boundary:

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The initial v1.0.0 release was validated with 15 PHPUnit tests (27 assertions)...

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A successful precondition check does not guarantee the state will still be valid when the callback commits its changes.

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