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<?php
namespace Dotenv;
use Dotenv\Exception\ValidationException;
use Dotenv\Regex\Regex;
/**
* This is the validator class.
*
* It's responsible for applying validations against a number of variables.
*/
class Validator
{
/**
* The variables to validate.
*
* @var string[]
*/
protected $variables;
/**
* The loader instance.
*
* @var \Dotenv\Loader
*/
protected $loader;
/**
* Create a new validator instance.
*
* @param string[] $variables
* @param \Dotenv\Loader $loader
* @param bool $required
*
* @throws \Dotenv\Exception\ValidationException
*
* @return void
*/
public function __construct(array $variables, Loader $loader, $required = true)
{
$this->variables = $variables;
$this->loader = $loader;
if ($required) {
$this->assertCallback(
function ($value) {
return $value !== null;
},
'is missing'
);
}
}
/**
* Assert that each variable is not empty.
*
* @throws \Dotenv\Exception\ValidationException
*
* @return \Dotenv\Validator
*/
public function notEmpty()
{
return $this->assertCallback(
function ($value) {
if ($value === null) {
return true;
}
return strlen(trim($value)) > 0;
},
'is empty'
);
}
/**
* Assert that each specified variable is an integer.
*
* @throws \Dotenv\Exception\ValidationException
*
* @return \Dotenv\Validator
*/
public function isInteger()
{
return $this->assertCallback(
function ($value) {
if ($value === null) {
return true;
}
return ctype_digit($value);
},
'is not an integer'
);
}
/**
* Assert that each specified variable is a boolean.
*
* @throws \Dotenv\Exception\ValidationException
*
* @return \Dotenv\Validator
*/
public function isBoolean()
{
return $this->assertCallback(
function ($value) {
if ($value === null) {
return true;
}
if ($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 $this->assertCallback(
function ($value) use ($choices) {
if ($value === null) {
return true;
}
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 $regex
*
* @throws \Dotenv\Exception\ValidationException
*
* @return \Dotenv\Validator
*/
public function allowedRegexValues($regex)
{
return $this->assertCallback(
function ($value) use ($regex) {
if ($value === null) {
return true;
}
return Regex::match($regex, $value)->success()->getOrElse(0) === 1;
},
sprintf('does not match "%s"', $regex)
);
}
/**
* Assert that the callback returns true for each variable.
*
* @param callable $callback
* @param string $message
*
* @throws \Dotenv\Exception\ValidationException
*
* @return \Dotenv\Validator
*/
protected function assertCallback(callable $callback, $message = 'failed callback assertion')
{
$failing = [];
foreach ($this->variables as $variable) {
if ($callback($this->loader->getEnvironmentVariable($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;
}
}