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<?php
declare(strict_types=1);
namespace Dotenv;
use Dotenv\Exception\ValidationException;
use Dotenv\Repository\RepositoryInterface;
use Dotenv\Util\Regex;
use Dotenv\Util\Str;
class Validator
{
/**
* The environment repository instance.
*
* @var \Dotenv\Repository\RepositoryInterface
*/
private $repository;
/**
* The variables to validate.
*
* @var string[]
*/
private $variables;
/**
* Create a new validator instance.
*
* @param \Dotenv\Repository\RepositoryInterface $repository
* @param string[] $variables
*
* @throws \Dotenv\Exception\ValidationException
*
* @return void
*/
public function __construct(RepositoryInterface $repository, array $variables)
{
$this->repository = $repository;
$this->variables = $variables;
}
/**
* Assert that each variable is present.
*
* @throws \Dotenv\Exception\ValidationException
*
* @return \Dotenv\Validator
*/
public function required()
{
return $this->assert(
static function (?string $value) {
return $value !== null;
},
'is missing'
);
}
/**
* Assert that each variable is not empty.
*
* @throws \Dotenv\Exception\ValidationException
*
* @return \Dotenv\Validator
*/
public function notEmpty()
{
return $this->assertNullable(
static function (string $value) {
return Str::len(\trim($value)) > 0;
},
'is empty'
);
}
/**
* Assert that each specified variable is an integer.
*
* @throws \Dotenv\Exception\ValidationException
*
* @return \Dotenv\Validator
*/
public function isInteger()
{
return $this->assertNullable(
static function (string $value) {
return \ctype_digit($value);
},
'is not an integer'
);
}
/**
* Assert that each specified variable is a boolean.
*
* @throws \Dotenv\Exception\ValidationException
*
* @return \Dotenv\Validator
*/
public function isBoolean()
{
return $this->assertNullable(
static function (string $value) {
if ($value === '') {
return false;
}
return \filter_var($value, \FILTER_VALIDATE_BOOLEAN, \FILTER_NULL_ON_FAILURE) !== null;
},
'is not a boolean'
);
}
/**
* Assert that each variable is amongst the given choices.
*
* @param string[] $choices
*
* @throws \Dotenv\Exception\ValidationException
*
* @return \Dotenv\Validator
*/
public function allowedValues(array $choices)
{
return $this->assertNullable(
static function (string $value) use ($choices) {
return \in_array($value, $choices, true);
},
\sprintf('is not one of [%s]', \implode(', ', $choices))
);
}
/**
* Assert that each variable matches the given regular expression.
*
* @param string $regex
*
* @throws \Dotenv\Exception\ValidationException
*
* @return \Dotenv\Validator
*/
public function allowedRegexValues(string $regex)
{
return $this->assertNullable(
static function (string $value) use ($regex) {
return Regex::matches($regex, $value)->success()->getOrElse(false);
},
\sprintf('does not match "%s"', $regex)
);
}
/**
* Assert that the callback returns true for each variable.
*
* @param callable(?string):bool $callback
* @param string $message
*
* @throws \Dotenv\Exception\ValidationException
*
* @return \Dotenv\Validator
*/
public function assert(callable $callback, string $message)
{
$failing = [];
foreach ($this->variables as $variable) {
if ($callback($this->repository->get($variable)) === false) {
$failing[] = \sprintf('%s %s', $variable, $message);
}
}
if (\count($failing) > 0) {
throw new ValidationException(\sprintf(
'One or more environment variables failed assertions: %s.',
\implode(', ', $failing)
));
}
return $this;
}
/**
* Assert that the callback returns true for each variable.
*
* Skip checking null variable values.
*
* @param callable(string):bool $callback
* @param string $message
*
* @throws \Dotenv\Exception\ValidationException
*
* @return \Dotenv\Validator
*/
public function assertNullable(callable $callback, string $message)
{
return $this->assert(
static function (?string $value) use ($callback) {
if ($value === null) {
return true;
}
return $callback($value);
},
$message
);
}
}