<?php
/*****************************************************************************
 * ResetPassword.php
 * Contains the controller for the reset password procedure.
 *
 * Kabuki CMS (C) 2013-2016, Aaron van Geffen
 *****************************************************************************/

class ResetPassword extends HTMLController
{
	public function __construct()
	{
		// Already logged in? Then you don't need this.
		if (Registry::get('user')->isLoggedIn())
			throw new UserFacingException('You are already logged in.');

		// Verifying an existing reset key?
		if (isset($_GET['step'], $_GET['email'], $_GET['key']) && $_GET['step'] == 2)
			$this->verifyResetKey();
		else
			$this->requestResetKey();
	}

	private function requestResetKey()
	{
		parent::__construct('Reset password - ' . SITE_TITLE);
		$form = new ForgotPasswordForm();
		$this->page->adopt($form);

		// Have they submitted an email address yet?
		if (isset($_POST['emailaddress']) && preg_match('~^.+@.+\.[a-z]+$~', trim($_POST['emailaddress'])))
		{
			$user = Member::fromEmailAddress($_POST['emailaddress']);
			if (!$user)
			{
				$form->adopt(new Alert('Invalid email address', 'The email address you provided could not be found in our system. Please try again.', 'danger'));
				return;
			}

			if (Authentication::getResetTimeOut($user->getUserId()) > 0)
			{
				// Update the reset time-out to prevent hammering
				$resetTimeOut = Authentication::updateResetTimeOut($user->getUserId());

				// Present it to the user in a readable way
				if ($resetTimeOut > 3600)
					$timeOut = sprintf('%d hours', ceil($resetTimeOut / 3600));
				elseif ($resetTimeOut > 60)
					$timeOut = sprintf('%d minutes', ceil($resetTimeOut / 60));
				else
					$timeOut = sprintf('%d seconds', $resetTimeOut);

				$form->adopt(new Alert('Password reset token already sent', 'We already sent a password reset token to this email address recently. ' .
					'If no email was received, please wait ' . $timeOut . ' to try again.', 'error'));
				return;
			}

			Authentication::setResetKey($user->getUserId());
			Email::resetMail($user->getUserId());

			// Show the success message
			$this->page->clear();
			$box = new DummyBox('An email has been sent');
			$box->adopt(new Alert('', 'We have sent an email to ' . $_POST['emailaddress'] . ' containing details on how to reset your password.', 'success'));
			$this->page->adopt($box);
		}
	}

	private function verifyResetKey()
	{
		$email = rawurldecode($_GET['email']);
		$user = Member::fromEmailAddress($email);
		if (!$user)
			throw new UserFacingException('Invalid email address. Please make sure you copied the full link in the email you received.');

		$key = $_GET['key'];
		if (!Authentication::checkResetKey($user->getUserId(), $key))
			throw new UserFacingException('Invalid reset token. Please make sure you copied the full link in the email you received. Note: you cannot use the same token twice.');

		parent::__construct('Reset password - ' . SITE_TITLE);
		$form = new PasswordResetForm($email, $key);
		$this->page->adopt($form);

		// Are they trying to set something already?
		if (isset($_POST['password1'], $_POST['password2']))
		{
			$missing = [];
			if (strlen($_POST['password1']) < 6 || !preg_match('~[^A-z]~', $_POST['password1']))
				$missing[] = 'Please fill in a password that is at least six characters long and contains at least one non-alphabetic character (e.g. a number or symbol).';
			if ($_POST['password1'] != $_POST['password2'])
				$missing[] = 'The passwords you entered do not match.';

			// So, are we good to go?
			if (empty($missing))
			{
				Authentication::updatePassword($user->getUserId(), Authentication::computeHash($_POST['password1']));

				// Consume token, ensuring it isn't used again
				Authentication::consumeResetKey($user->getUserId());

				$_SESSION['login_msg'] = ['Your password has been reset', 'You can now use the form below to log in to your account.', 'success'];
				header('Location: ' . BASEURL . '/login/');
				exit;
			}
			else
				$form->adopt(new Alert('Some fields require your attention', '<ul><li>' . implode('</li><li>', $missing) . '</li></ul>', 'danger'));
		}
	}
}