zsolt / guard-clauses
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Guard clauses for php
1.0.0
2022-09-28 21:41 UTC
Requires
- php: ^8.0
Requires (Dev)
- phpstan/phpstan: ^1.8
- phpunit/phpunit: 9.5.24
README
A simple package with guard clause.
A guard clause is a software pattern that simplifies complex functions by "failing fast", checking for invalid inputs up front and immediately failing if any are found.
Installation
composer require zsolt/guard-clauses
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Usage
function sendEmailToCustomer(Customer $customer): void { $email = GuardAgainst::null($customer->getEmail()); // ... } final class Customer { private string $firstName; private string $lastName; private int $age; private string $login; private ?string $email; function __construct( string $firstName, string $lastName, int $age, string $login, ?string $email = null ) { $this->firstName = GuardAgainst::emptyOrWhiteSpace($firstName); $this->lastName = GuardAgainst::emptyOrWhiteSpace($lastName); $this->age = GuardAgainst::negative($age); $this->login = GuardAgainst::match($login, "admin", "login", "You can not be an admin"); $this->email = $email; } }
Supported Guard Clauses
GuardAgainst::null(); // Guard against null values GuardAgainst::true(); // Guard against true values GuardAgainst::nullOrTrue(); // Guard against null or true values GuardAgainst::false(); // Guard against false values GuardAgainst::nullOrFalse(); // Guard against null or false values GuardAgainst::negative(); // Guard against numbers less than zero GuardAgainst::positive(); // Guard against numbers more than zero GuardAgainst::zero(); // Guard against the number zero GuardAgainst::negativeOrZero(); // Guard against numbers less than or equal to zero GuardAgainst::positiveOrZero(); // Guard against numbers more than or equal to zero GuardAgainst::match(); // Guard against values that loosely match a specified value GuardAgainst::strictMatch(); // Guard against values that strictly match a specified value GuardAgainst::range(); // Guard against values that are in the specified range GuardAgainst::notRange(); // Guard against values that are NOT in the specified range GuardAgainst::empty(); // Guard against empty values GuardAgainst::whiteSpace(); // Guard against string that contains only one white space GuardAgainst::emptyOrWhiteSpace(); // Guard against string that are empty or contains only one white space GuardAgainst::regex(); // Guard against string that matches the regex pattern GuardAgainst::count(); // Guard against countable that matches a specific count GuardAgainst::countOrMore(); // Guard against countable that is MORE or matches a specific count GuardAgainst::countOrLess(); // Guard against countable that is LESS or matches a specific count GuardAgainst::arrayHasValue(); // Guard against a value in the array GuardAgainst::arrayHasNoValue(); // Guard against a value NOT in the array GuardAgainst::type(); // Guard against the specified type type (gettype) GuardAgainst::notType(); // Guard against not the specified type (gettype) GuardAgainst::hasProperty(); // Guard against a property existing on an object GuardAgainst::hasNoProperty(); // Guard against a property NOT existing on an object GuardAgainst::expression(); // Guard against the expression returning true