<?php namespace HashOver;

// Copyright (C) 2010-2021 Jacob Barkdull
// This file is part of HashOver.
//
// HashOver is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// HashOver is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with HashOver. If not, see <http://www.gnu.org/licenses/>.


class Cookies
{
protected $setup;
protected $login;

protected $domain;
protected $enabled = true;
protected $secure = false;

public function __construct (Setup $setup, Login $login)
{
// Store parameters as properties
$this->setup = $setup;
$this->login = $login;

// Store domain from setup locally
$this->domain = $setup->domain;

// Remove port from domain
if (mb_strpos ($this->domain, ':') !== false) {
$this->domain = mb_substr ($this->domain, 0, strrpos ($this->domain, ':'));
}

// Transmit cookies over HTTPS if set so in Settings
if ($setup->secureCookies === true) {
$this->secure = $setup->isHTTPS ();
}
}

// Returns cookie expiration date after datetime modification
protected function getCookieExpiration ()
{
// Get current datetime
$datetime = new \DateTime ();

// Return zero expiration date is session
if ($this->setup->cookieExpiration === 'session') {
return 0;
}

// Set date/time to configured expiration date/time
$modified = @$datetime->modify ($this->setup->cookieExpiration);

// Set datetime to next month if modification failed
if ($modified === false) {
$datetime->modify ('next month');
}

// Get datetime timestamp
$timestamp = $datetime->getTimestamp ();

// And return timestamp
return $timestamp;
}

// Set a cookie with expiration date
public function set ($name, $value = '', $date = false)
{
// Add pseudo-namespacing prefix to cookie name
$name = 'hashover-' . $name;

// Use specific expiration date or configured date
$date = $date ?: $this->getCookieExpiration ();

// Shorter variables for cleaner code
$set_cookie = $this->setup->setsCookies;
$is_admin = $this->login->userIsAdmin;

// Set cookie only if they are enabled or user is Admin
if ($set_cookie === true or $is_admin === true) {
setcookie ($name, $value, $date, '/', $this->domain, $this->secure, true);
}
}

// Set cookies for remembering state login actions
public function setFailedOn ($input, $reply_to, $replied = true)
{
// Set success status cookie
$this->set ('failed-on', $input);

// Set reply cookie
if ($replied === true and !empty ($reply_to)) {
$this->set ('replied', $reply_to);
}

// Set comment text cookie
$comment = $this->setup->getRequest ('comment');

// Check if comment is set
if ($comment !== false) {
$this->set ('comment', $comment);
}
}

// Get cookie value
public function getValue ($name, $trim = false)
{
// Add pseudo-namespacing prefix to cookie name
$name = 'hashover-' . $name;

// Check if cookie exists
if (!empty ($_COOKIE[$name])) {
// If so, store as value for cleaner code
$value = $_COOKIE[$name];

// Strip escape slashes from cookie value
$value = $this->setup->stripMagicQuotes ($value);

// Return trimmed value if told to
if ($trim === true) {
$value = trim ($value, " \r\n\t");
}

// Otherwise, return value as-is
return $value;
}

// If not, return null
return null;
}

// Expire a cookie
public function expireCookie ($cookie)
{
// Set its expiration date to 1 if it exists
if ($this->getValue ($cookie) !== null) {
$this->set ($cookie, '', 1);
}
}

// Expire HashOver's default cookies
public function clear ()
{
// Expire message cookie
$this->expireCookie ('message');

// Expire error cookie
$this->expireCookie ('error');

// Expire comment failure cookie
$this->expireCookie ('failed-on');

// Expire reply failure cookie
$this->expireCookie ('replied');

// Expire comment text cookie
$this->expireCookie ('comment');
}
}