FreeSTAR-Status-Engine/classes/user.php

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<?php
/**
* Class that encapsulates everything that can be done with a user
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*/
class User
{
private $id;
private $name;
private $surname;
private $username;
private $email;
private $rank;
private $active;
/**
* Gets user data from database and creates the class
* @param int $id user ID
*/
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function __construct($id)
{
global $mysqli;
$stmt = $mysqli->prepare("SELECT * FROM users WHERE id=?");
$stmt->bind_param("d", $id);
$stmt->execute();
$query = $stmt->get_result();
if (!$query->num_rows)
{
throw new Exception("User doesn't exist.");
return;
}
$result = $query->fetch_array();
$this->id = $id;
$this->active = $result['active'];
$this->name = $result['name'];
$this->email = $result['email'];
$this->surname = $result['surname'];
$this->username = $result['username'];
$this->rank = $result['permission'];
}
/**
* Returns username of this user
* @return String username
*/
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public function get_username()
{
return $this->username;
}
/**
* Returns whether this user is active
* @return Boolean user active status
*/
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public function is_active()
{
return $this->active;
}
/**
* Returns rank of this user
* @return int rank
*/
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public function get_rank()
{
return $this->rank;
}
/**
* Returns full name of this user
* @return String name in "Name Surname" format
*/
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public function get_name()
{
return $this->name . " " . $this->surname;
}
/**
* Toggles active status of this user. First checks if the user
* making the change has permission to do that.
* @return void
*/
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public function toggle()
{
global $mysqli, $message, $user;
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$id = $_GET['id'];
if ($this->id!=$_SESSION['user'] && $user->get_rank()<=1 && ($user->get_rank()<$this->rank))
{
$stmt = $mysqli->prepare("UPDATE users SET active = !active WHERE id=?");
$stmt->bind_param("i", $this->id);
$stmt->execute();
$stmt->close();
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header("Location: ".WEB_URL."/admin/?do=user&id=".$id);
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}else{
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$message = _("You don't have the permission to do that!");
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}
}
/**
* Processes submitted form and adds user unless problem is encountered,
* calling this is possible only for Superadmin (other ranks cannot add users)
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* or when the installation script is being run. Also checks requirements
* for username and email being unique and char limits.
* @return void
*/
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public static function add()
{
global $user, $message, $mysqli;
if (INSTALL_OVERRIDE || $user->get_rank()==0)
{
if (strlen(trim($_POST['name']))==0) {
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$messages[] = _("Name");
}
if(strlen(trim($_POST['surname']))==0) {
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$messages[] = _("Surname");
}
if(strlen(trim($_POST['email']))==0) {
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$messages[] = _("Email");
}
if(strlen(trim($_POST['password']))==0) {
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$messages[] = _("Password");
}
if(!isset($_POST['permission']))
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{
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$messages[] = _("Rank");
}
if (!isset($messages)){
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$name = $_POST['name'];
$surname = $_POST['surname'];
$username = $_POST['username'];
$email = $_POST['email'];
$pass = $_POST['password'];
if (!filter_var($email, FILTER_VALIDATE_EMAIL))
{
$message = "Invalid email!";
return;
}
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$variables = array();
if (strlen($name)>50){
$variables[] = 'name: 50';
}
if (strlen($surname)>50){
$variables[] = 'surname: 50';
}
if (strlen($username)>50){
$variables[] = 'username: 50';
}
if (strlen($email)>60){
$variables[] = 'email: 60';
}
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if (!empty($variables))
{
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$message = _("Please mind the following character limits: ");
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$message .= implode(", ", $variables);
return;
}
$salt = uniqid(mt_rand(), true);
$hash = hash('sha256', $pass.$salt);
$permission = $_POST['permission'];
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$stmt = $mysqli->prepare("INSERT INTO users values (NULL, ?, ?, ?, ?, ?, ?, ?, 1)");
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$stmt->bind_param("ssssssi", $email, $username, $name, $surname, $hash, $salt, $permission);
$stmt->execute();
if ($stmt->affected_rows>0)
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{
$to = $email;
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$subject = _('User account created').' - '.NAME;
$msg = sprintf(_("Hi %s!<br>"."Your account has been created. You can login with your email address at <a href=\"%s\">%s</a> with password %s - please change it as soon as possible."), $name." ".$surname,WEB_URL."/admin", WEB_URL."/admin", $pass);
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$headers = "Content-Type: text/html; charset=utf-8 ".PHP_EOL;
$headers .= "MIME-Version: 1.0 ".PHP_EOL;
$headers .= "From: ".MAILER_NAME.' <'.MAILER_ADDRESS.'>'.PHP_EOL;
$headers .= "Reply-To: ".MAILER_NAME.' <'.MAILER_ADDRESS.'>'.PHP_EOL;
mail($to, $subject, $msg, $headers);
if (!INSTALL_OVERRIDE)
{
header("Location: ".WEB_URL."/admin/?do=settings");
}
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}
else{
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$message = _("Username or email already used");
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}
}
else{
$message = "Please enter ".implode(", ", $messages);
}
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}
else {
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$message = _("You don't have the permission to do that!");
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}
}
/**
* Processes submitted form and logs user in, unless the user is deactivated or wrong
* password or email has been submitted. The script doesn't let anyone know which
* field was wrong as it is not possible to verify email address from outside admin panel,
* so this actually helps with security :)
* @return void
*/
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public static function login()
{
global $message, $mysqli;
if (isset($_POST['email']))
{
$email = $_POST['email'];
$pass = $_POST['pass'];
$stmt = $mysqli->prepare("SELECT id,password_salt as salt,active FROM users WHERE email=?");
$stmt->bind_param("s", $email);
$stmt->execute();
$query = $stmt->get_result();
if ($query->num_rows)
{
$result = $query->fetch_assoc();
$salt = $result["salt"];
$id = $result["id"];
$active = $result["active"];
if (!$active)
{
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$message = _("Your account has been disabled. Please contact administrator.");
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}
else
{
$hash = hash('sha256', $pass.$salt);
$stmt = $mysqli->prepare("SELECT count(*) as count FROM users WHERE id=? AND password_hash=?");
$stmt->bind_param("is", $id, $hash);
$stmt->execute();
$query = $stmt->get_result();
if (!$query->fetch_assoc()['count'])
{
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$message = _("Wrong email or password");
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}else
{
if (isset($_POST['remember'])&&$_POST['remember'])
{
$year = strtotime('+356 days', time());
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$token = Token::add($id, 'remember', $year);
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setcookie('token', $token, $year, "/");
setcookie('user', $id, $year, "/");
}
$_SESSION['user'] = $id;
header("Location: ".WEB_URL."/admin");
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}
}
}
else{
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$message = _("Wrong email or password");
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}
}
}
/**
* Checks whether token is valid (this means is in database and associated
* with the user) and sets session data if it is, so user remains logged in.
* The script deletes the token either way.
* @return void
*/
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public static function restore_session()
{
global $message;
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$id = $_COOKIE['user'];
$token = $_COOKIE['token'];
if (Token::validate($token, $id, "remember"))
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{
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$year = strtotime('+356 days', time());
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unset($_COOKIE['token']);
$_SESSION['user'] = $id;
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$new_token = Token::add($id, 'remember', $year);
setcookie('token', $new_token, $year, "/");
setcookie('user', $id, $year, "/");
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}
else
{
unset($_COOKIE['user']);
unset($_COOKIE['token']);
setcookie('user', null, -1, '/');
setcookie('token', null, -1, '/');
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$message = _("Invalid token detected, please login again!");
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}
Token::delete($token);
}
/**
* Renders settings for this user so it can be displayed in admin panel.
* @return void
*/
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public function render_user_settings()
{
global $permissions, $user;
?>
<div class="row">
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<div class="col-md-2 col-md-offset-2"><img src="https://www.gravatar.com/avatar/<?php echo md5( strtolower( trim( $this->email ) ) );?>" alt="<?php echo _("Profile picture");?>"></div>
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<div class="col-md-6"><h3><?php echo $this->name." ".$this->surname;?></h3></div>
</div>
<div class="row">
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<div class="col-md-2 col-md-offset-2"><strong><?php echo _("ID");?></strong></div>
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<div class="col-md-6"><?php echo $this->id; ?></div>
</div>
<div class="row">
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<div class="col-md-2 col-md-offset-2"><strong><?php echo _("Username");?></strong></div>
<div class="col-md-6"><?php echo $this->username." "; if ($this->id!=$_SESSION['user'] && $user->get_rank()<=1 && ($user->get_rank()<$this->rank))
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{
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echo "<a href='".WEB_URL."/admin/?do=user&id=".$this->id."&what=toggle'>";
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echo "<i class='fa fa-".($this->active?"check success":"times danger")."'></i></a>";
}else{
echo "<i class='fa fa-".($this->active?"check success":"times danger")."'></i>";
}?></div>
</div>
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<form action="<?php echo WEB_URL;?>/admin/?do=user&id=<?php echo $this->id; ?>" method="POST">
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<div class="row">
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<div class="col-md-2 col-md-offset-2"><strong><?php echo _("Role");?></strong></div>
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<div class="col-md-6"><?php if ($user->get_rank() == 0 && $this->id != $_SESSION['user']){?> <div class="input-group"><select class="form-control" name="permission"><?php foreach ($permissions as $key => $value) {
echo "<option value='$key' ".($key==$this->rank?"selected":"").">$value</option>";
} ?>
</select><span class="input-group-btn">
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<button type="submit" class="btn btn-primary pull-right"><?php echo _("Change role");?></button>
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</span>
</div><?php }else{ echo $permissions[$this->rank];}?></div>
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</div>
</form>
<?php if($this->id==$_SESSION['user'])
{?>
<form action="<?php echo WEB_URL;?>/admin/?do=user" method="POST">
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<div class="row">
<div class="col-md-2 col-md-offset-2"><strong>Email</strong></div>
<div class="col-md-6">
<div class="input-group">
<input type="email" class="form-control" name="email" value="<?php echo $this->email; ?>">
<span class="input-group-btn">
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<button type="submit" class="btn btn-primary pull-right"><?php echo _("Change email");?></button>
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</span>
</div>
</div>
</div>
</form>
<form action="<?php echo WEB_URL;?>/admin/?do=user" method="POST">
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<div class="row">
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<div class="col-md-2 col-md-offset-2"><strong><?php echo _("Password");?></strong></div>
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<div class="col-md-6">
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<label for="password"><?php echo _("Old password");?></label>
<input id="password" placeholder="<?php echo _("Old password");?>" type="password" class="form-control" name="old_password">
<label for="new_password"><?php echo _("New password");?></label>
<input id="new_password" placeholder="<?php echo _("New password");?>" type="password" class="form-control" name="password">
<label for="new_password_check"><?php echo _("Repeat password");?></label>
<input id="new_password_check" placeholder="<?php echo _("Repeat password");?>" type="password" class="form-control" name="password_repeat">
<button type="submit" class="btn btn-primary pull-right margin-top"><?php echo _("Change password");?></button>
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</div>
</div>
</form>
<?php
}
else
{
?>
<div class="row">
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<div class="col-md-2 col-md-offset-2"><strong><?php echo _("Email");?></strong></div>
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<div class="col-md-6">
<a href="mailto:<?php echo $this->email; ?>"><?php echo $this->email; ?></a>
</div>
</div>
<?php
}
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if ($this->id!=$_SESSION['user'] && $user->get_rank()<=1 && ($user->get_rank()<$this->rank))
{?>
<div class="row">
<div class="col-md-2 col-md-offset-2"></div>
<div class="col-md-6">
<?php
if ($this->active){
echo '<a href="'.WEB_URL.'/admin/?do=user&id='.$this->id.'&what=toggle" class="btn btn-danger">'._("Deactivate user")."</a>";
}else{
echo '<a href="'.WEB_URL.'/admin/?do=user&id='.$this->id.'&what=toggle" class="btn btn-success">'._("Activate user")."</a>";
}
?>
</div>
</div>
<?php }
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}
/**
* Changes user password and deletes all remember tokens so all other sessions
* won't stay logged in without knowing new pass. Uses token when reseting password.
* @param String $token
* @return void
*/
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public function change_password($token = false)
{
global $mysqli, $message;
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$id = $this->id;
if ($_POST['password']!=$_POST['password_repeat'])
{
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$message = _("Passwords do not match!");
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}else{
if (!$token)
{
if ($_SESSION['user']!=$id)
{
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$message = _("Cannot change password of other users!");
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}else{
$stmt = $mysqli->prepare("SELECT password_salt as salt FROM users WHERE id=?");
$stmt->bind_param("i", $id);
$stmt->execute();
$query = $stmt->get_result();
$result = $query->fetch_assoc();
$salt = $result['salt'];
$pass = $_POST['old_password'];
$hash = hash('sha256', $pass.$salt);
$stmt = $mysqli->prepare("SELECT count(*) as count FROM users WHERE id=? AND password_hash = ?");
$stmt->bind_param("is", $id, $hash);
$stmt->execute();
if ($stmt->get_result()->fetch_assoc()['count'])
{
$pass = $_POST['password'];
$hash = hash('sha256', $pass.$salt);
$stmt = $mysqli->prepare("UPDATE users SET password_hash = ? WHERE id=?");
$stmt->bind_param("si", $hash, $id);
$stmt->execute();
$stmt->close();
$stmt = $mysqli->prepare("DELETE FROM tokens WHERE user = ? AND data = 'remember'");
$stmt->bind_param("d", $id);
$stmt->execute();
$stmt->get_result();
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User::logout();
}
else{
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$message = _("Wrong password!");
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}
}
}else{
if (Token::validate($token, $id, "passwd"))
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{
$stmt = $mysqli->prepare("SELECT password_salt as salt FROM users WHERE id=?");
$stmt->bind_param("i", $id);
$stmt->execute();
$query = $stmt->get_result();
$result = $query->fetch_assoc();
$salt = $result['salt'];
$pass = $_POST['password'];
$hash = hash('sha256', $pass.$salt);
$stmt = $mysqli->prepare("UPDATE users SET password_hash = ? WHERE id=?");
$stmt->bind_param("si", $hash,$id);
$stmt->execute();
$stmt->close();
$stmt = $mysqli->prepare("DELETE FROM tokens WHERE user = ? AND data = 'remember'");
$stmt->bind_param("d", $id);
$stmt->execute();
$stmt->get_result();
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}
else
{
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$message = _("Invalid token detected, please retry your request from start!");
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}
Token::delete($token);
}
}
}
/**
* Sends email with link for password reset, link is token protected and valid only once.
* @return void
*/
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public static function password_link()
{
global $mysqli;
$email = $_POST['email'];
$stmt = $mysqli->prepare("SELECT id FROM users WHERE email=?");
$stmt->bind_param("s", $email);
$stmt->execute();
$query = $stmt->get_result();
$id = $query->fetch_assoc()['id'];
$time = strtotime('+1 day', time());
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$token = Token::add($id, 'passwd', $time);
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$link = WEB_URL."/admin/?do=lost-password&id=$id&token=$token";
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$to = $email;
$user = new User($id);
$subject = _('Reset password') . ' - '.NAME;
$msg = sprintf(_( "Hi %s!<br>Below you will find link to change your password. The link is valid for 24hrs. If you didn't request this, feel free to ignore it. <br><br><a href=\"%s\">RESET PASSWORD</a><br><br>If the link doesn't work, copy &amp; paste it into your browser: <br>%s"), $user->get_name(), $link, $link);
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$headers = "Content-Type: text/html; charset=utf-8 ".PHP_EOL;
$headers .= "MIME-Version: 1.0 ".PHP_EOL;
$headers .= "From: ".MAILER_NAME.' <'.MAILER_ADDRESS.'>'.PHP_EOL;
$headers .= "Reply-To: ".MAILER_NAME.' <'.MAILER_ADDRESS.'>'.PHP_EOL;
mail($to, $subject, $msg, $headers);
}
/**
* Sends email with link for email change confirmation (security reasons), link is token protected and valid only once.
* @return void
*/
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public function email_link(){
global $user;
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$email = $_POST['email'];
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$time = strtotime('+1 day', time());
$id = $this->id;
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$token = Token::add($id, 'email;$email', $time);
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$link = WEB_URL."/admin/?do=change-email&id=$id&token=$token";
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$to = $email;
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$subject = _('Email change').' - '.NAME;
$msg = sprintf(_( "Hi %s!<br>Below you will find link to change your email. The link is valid for 24hrs. If you didn't request this, feel free to ignore it. <br><br><a href=\"%s\">CHANGE EMAIL</a><br><br>If the link doesn't work, copy &amp; paste it into your browser: <br>%s"), $user->get_name(), $link, $link);
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$headers = "Content-Type: text/html; charset=utf-8 ".PHP_EOL;
$headers .= "MIME-Version: 1.0 ".PHP_EOL;
$headers .= "From: ".MAILER_NAME.' <'.MAILER_ADDRESS.'>'.PHP_EOL;
$headers .= "Reply-To: ".MAILER_NAME.' <'.MAILER_ADDRESS.'>'.PHP_EOL;
mail($to, $subject, $msg, $headers);
}
/**
* Changes email.
* @return void
*/
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public function change_email()
{
global $mysqli, $message;
$token = $_GET['token'];
$id = $_GET['id'];
if (Token::validate($token, $id, "email;%"))
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{
$data = explode(";", Token::get_data($token, $id));
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$email = $data[1];
$stmt = $mysqli->prepare("UPDATE users SET email = ? WHERE id=?");
$stmt->bind_param("sd", $email, $id);
$stmt->execute();
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$stmt->get_result();
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Token::delete($token);
header("Location: ".WEB_URL."/admin/");
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}
else
{
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$message = _("Invalid token detected, please retry your request from start!");
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}
Token::delete($token);
}
/**
* Logs current user out.
* @return void
*/
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public static function logout(){
session_unset();
if (isset($_COOKIE['token']))
{
$token = $_COOKIE['token'];
Token::delete($token);
unset($_COOKIE['user']);
unset($_COOKIE['token']);
setcookie('user', null, -1, '/');
setcookie('token', null, -1, '/');
}
header("Location: ".WEB_URL."/admin");
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}
/**
* Changes permissions of current user - only super admin can do this, so it checks permission first.
* @return void
*/
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public function change_permission(){
global $mysqli, $message, $user;
if ($user->get_rank()==0)
{
$permission = $_POST['permission'];
$id = $_GET['id'];
$stmt = $mysqli->prepare("UPDATE users SET permission=? WHERE id=?");
$stmt->bind_param("si", $permission, $id);
$stmt->execute();
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header("Location: ".WEB_URL."/admin/?do=user&id=".$id);
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}
else{
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$message = _("You don't have permission to do that!");
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}
}
}