<?php
namespace MailPoet\Subscription;

class Blacklist {
  const SALT = 'mailpoet';

  private $blacklist = [
    'e60c6e0e73997c92d4ceac78a6b6cbbe6249244c4106a3c31de421fc50370ecd' => 1,
  ];

  public function isBlacklisted($email) {
    $hashed_email = $this->hash($email);
    return !empty($this->blacklist[$hashed_email]);
  }

  public function hash($email) {
    return hash('sha256', $email . self::SALT);
  }

  public function addEmail($email) {
    $hashed_email = $this->hash($email);
    $this->blacklist[$hashed_email] = 1;
  }
}