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Filename : exceptions.php
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<?php declare(strict_types = 1);

// phpcs:ignoreFile PSR1.Classes.ClassDeclaration
namespace MailPoet;

if (!defined('ABSPATH')) exit;


/**
 * Provides information for converting exceptions to HTTP responses.
 */
interface HttpAwareException {
  public function getHttpStatusCode(): int;
}


/**
 * Frames all MailPoet exceptions ("$e instanceof MailPoet\Exception").
 */
abstract class Exception extends \Exception {
  /** @var string[] */
  private $errors = [];

  final public function __construct($message = '', $code = 0, \Throwable $previous = null) {
    parent::__construct($message, $code, $previous);
  }

  public static function create(\Throwable $previous = null): self {
    return new static('', 0, $previous);
  }

  public function withMessage(string $message): self {
    $this->message = $message;
    return $this;
  }

  public function withCode(int $code): self {
    $this->code = $code;
    return $this;
  }

  public function withErrors(array $errors): self {
    $this->errors = $errors;
    return $this;
  }

  public function getErrors(): array {
    return $this->errors;
  }
}


/**
 * USE: Generic runtime error. When possible, use a more specific exception instead.
 * API: 500 Server Error (not HTTP-aware)
 */
class RuntimeException extends Exception {}


/**
 * USE: When wrong data VALUE is received.
 * API: 400 Bad Request
 */
class UnexpectedValueException extends RuntimeException implements HttpAwareException {
  public function getHttpStatusCode(): int {
    return 400;
  }
}


/**
 * USE: When an action is forbidden for given actor (although generally valid).
 * API: 403 Forbidden
 */
class AccessDeniedException extends UnexpectedValueException implements HttpAwareException {
  public function getHttpStatusCode(): int {
    return 403;
  }
}


/**
 * USE: When the main resource we're interested in doesn't exist.
 * API: 404 Not Found
 */
class NotFoundException extends UnexpectedValueException implements HttpAwareException {
  public function getHttpStatusCode(): int {
    return 404;
  }
}


/**
 * USE: When the main action produces conflict (i.e. duplicate key).
 * API: 409 Conflict
 */
class ConflictException extends UnexpectedValueException implements HttpAwareException {
  public function getHttpStatusCode(): int {
    return 409;
  }
}


/**
 * USE: An application state that should not occur. Can be subclassed for feature-specific exceptions.
 * API: 500 Server Error (not HTTP-aware)
 */
class InvalidStateException extends RuntimeException {}