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<?php namespace Dotenv; use Dotenv\Exception\InvalidCallbackException; use Dotenv\Exception\ValidationException; /** * This is the validator class. * * It's responsible for applying validations against a number of variables. */ class Validator { /** * The variables to validate. * * @var array */ protected $variables; /** * The loader instance. * * @var \Dotenv\Loader */ protected $loader; /** * Create a new validator instance. * * @param array $variables * @param \Dotenv\Loader $loader * * @return void */ public function __construct(array $variables, Loader $loader) { $this->variables = $variables; $this->loader = $loader; $this->assertCallback( function ($value) { return $value !== null; }, 'is missing' ); } /** * Assert that each variable is not empty. * * @return \Dotenv\Validator */ public function notEmpty() { return $this->assertCallback( function ($value) { return strlen(trim($value)) > 0; }, 'is empty' ); } /** * Assert that each specified variable is an integer. * * @return \Dotenv\Validator */ public function isInteger() { return $this->assertCallback( function ($value) { return ctype_digit($value); }, 'is not an integer' ); } /** * Assert that each variable is amongst the given choices. * * @param string[] $choices * * @return \Dotenv\Validator */ public function allowedValues(array $choices) { return $this->assertCallback( function ($value) use ($choices) { return in_array($value, $choices); }, 'is not an allowed value' ); } /** * Assert that the callback returns true for each variable. * * @param callable $callback * @param string $message * * @throws \Dotenv\Exception\InvalidCallbackException|\Dotenv\Exception\ValidationException * * @return \Dotenv\Validator */ protected function assertCallback($callback, $message = 'failed callback assertion') { if (!is_callable($callback)) { throw new InvalidCallbackException('The provided callback must be callable.'); } $variablesFailingAssertion = array(); foreach ($this->variables as $variableName) { $variableValue = $this->loader->getEnvironmentVariable($variableName); if (call_user_func($callback, $variableValue) === false) { $variablesFailingAssertion[] = $variableName." $message"; } } if (count($variablesFailingAssertion) > 0) { throw new ValidationException(sprintf( 'One or more environment variables failed assertions: %s.', implode(', ', $variablesFailingAssertion) )); } return $this; } }