416 lines
13 KiB
PHP
416 lines
13 KiB
PHP
<?php
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/**
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* Class User
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* Handles user-related functionalities such as registration, login, rights management, and profile updates.
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*/
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class User {
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/**
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* @var PDO Database connection instance.
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*/
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private $db;
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/**
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* User constructor.
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*
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* @param Database $database Database instance to retrieve a connection.
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*/
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public function __construct($database) {
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$this->db = $database->getConnection();
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}
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/**
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* Registers a new user.
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*
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* @param string $username The username of the new user.
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* @param string $password The password for the new user.
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* @return bool|string True if registration is successful, error message otherwise.
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*/
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public function register($username, $password) {
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try {
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// we have two inserts, start a transaction
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$this->db->beginTransaction();
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// hash the password, don't store it plain
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$hashedPassword = password_hash($password, PASSWORD_DEFAULT);
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// insert into users table
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$sql = 'INSERT
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INTO users (username, password)
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VALUES (:username, :password)';
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$query = $this->db->prepare($sql);
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$query->bindValue(':username', $username);
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$query->bindValue(':password', $hashedPassword);
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// execute the first query
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if (!$query->execute()) {
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// rollback on error
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$this->db->rollBack();
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return false;
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}
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// insert the last user id into users_meta table
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$sql2 = 'INSERT
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INTO users_meta (user_id)
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VALUES (:user_id)';
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$query2 = $this->db->prepare($sql2);
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$query2->bindValue(':user_id', $this->db->lastInsertId());
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// execute the second query
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if (!$query2->execute()) {
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// rollback on error
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$this->db->rollBack();
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return false;
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}
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// if all is OK, commit the transaction
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$this->db->commit();
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return true;
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} catch (Exception $e) {
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// rollback on any error
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$this->db->rollBack();
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return $e->getMessage();
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}
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}
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/**
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* Logs in a user by verifying credentials.
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*
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* @param string $username The username of the user.
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* @param string $password The password of the user.
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* @return bool True if login is successful, false otherwise.
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*/
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public function login($username, $password) {
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$query = $this->db->prepare("SELECT * FROM users WHERE username = :username");
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$query->bindParam(':username', $username);
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$query->execute();
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$user = $query->fetch(PDO::FETCH_ASSOC);
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if ( $user && password_verify($password, $user['password'])) {
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$_SESSION['user_id'] = $user['id'];
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$_SESSION['username'] = $user['username'];
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return true;
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} else {
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return false;
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}
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}
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/**
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* Retrieves a user ID based on the username.
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*
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* @param string $username The username to look up.
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* @return array|null User ID details or null if not found.
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*/
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// FIXME not used now?
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public function getUserId($username) {
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$sql = 'SELECT id FROM users WHERE username = :username';
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$query = $this->db->prepare($sql);
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$query->bindParam(':username', $username);
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$query->execute();
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return $query->fetchAll(PDO::FETCH_ASSOC);
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}
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/**
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* Fetches user details by user ID.
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*
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* @param int $user_id The user ID.
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* @return array|null User details or null if not found.
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*/
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public function getUserDetails($user_id) {
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$sql = 'SELECT
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um.*,
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u.username
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FROM
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users_meta um
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LEFT JOIN users u
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ON um.user_id = u.id
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WHERE
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u.id = :user_id';
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$query = $this->db->prepare($sql);
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$query->execute([
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':user_id' => $user_id,
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]);
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return $query->fetchAll(PDO::FETCH_ASSOC);
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}
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/**
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* Grants a user a specific right.
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*
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* @param int $user_id The user ID.
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* @param int $right_id The right ID to grant.
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* @return void
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*/
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public function addUserRight($user_id, $right_id) {
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$sql = 'INSERT INTO users_rights
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(user_id, right_id)
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VALUES
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(:user_id, :right_id)';
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$query = $this->db->prepare($sql);
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$query->execute([
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':user_id' => $user_id,
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':right_id' => $right_id,
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]);
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}
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/**
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* Revokes a specific right from a user.
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*
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* @param int $user_id The user ID.
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* @param int $right_id The right ID to revoke.
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* @return void
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*/
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public function removeUserRight($user_id, $right_id) {
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$sql = 'DELETE FROM users_rights
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WHERE
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user_id = :user_id
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AND
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right_id = :right_id';
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$query = $this->db->prepare($sql);
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$query->execute([
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':user_id' => $user_id,
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':right_id' => $right_id,
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]);
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}
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/**
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* Retrieves all rights in the system.
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*
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* @return array List of rights.
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*/
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public function getAllRights() {
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$sql = 'SELECT
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id AS right_id,
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name AS right_name
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FROM rights
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ORDER BY id ASC';
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$query = $this->db->prepare($sql);
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$query->execute();
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return $query->fetchAll(PDO::FETCH_ASSOC);
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}
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/**
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* Retrieves the rights assigned to a specific user.
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*
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* @param int $user_id The user ID.
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* @return array List of user rights.
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*/
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public function getUserRights($user_id) {
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$sql = 'SELECT
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u.id AS user_id,
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r.id AS right_id,
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r.name AS right_name
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FROM
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users u
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LEFT JOIN users_rights ur
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ON u.id = ur.user_id
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LEFT JOIN rights r
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ON ur.right_id = r.id
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WHERE
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u.id = :user_id';
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$query = $this->db->prepare($sql);
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$query->execute([
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':user_id' => $user_id,
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]);
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$result = $query->fetchAll(PDO::FETCH_ASSOC);
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// ensure specific entries are included in the result
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$specialEntries = [];
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// user 1 is always superuser
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if ($user_id == 1) {
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$specialEntries = [
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[
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'user_id' => 1,
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'right_id' => 1,
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'right_name' => 'superuser'
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]
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];
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// user 2 is always demo
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} elseif ($user_id == 2) {
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$specialEntries = [
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[
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'user_id' => 2,
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'right_id' => 100,
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'right_name' => 'demo user'
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]
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];
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}
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// merge the special entries with the existing results
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$result = array_merge($specialEntries, $result);
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// remove duplicates if necessary
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$result = array_unique($result, SORT_REGULAR);
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// return the modified result
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return $result;
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}
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/**
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* Check if the user has a specific right.
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*
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* @param int $user_id The user ID.
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* @param string $right_name The human-readable name of the user right.
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* @return bool True if the user has the right, false otherwise.
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*/
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function hasRight($user_id, $right_name) {
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$userRights = $this->getUserRights($user_id);
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$userHasRight = false;
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// superuser always has all the rights
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if ($user_id === 1) {
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$userHasRight = true;
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}
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foreach ($userRights as $right) {
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if ($right['right_name'] === $right_name) {
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$userHasRight = true;
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break;
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}
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}
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return $userHasRight;
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}
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/**
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* Updates a user's metadata in the database.
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*
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* @param int $user_id The ID of the user to update.
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* @param array $updatedUser An associative array containing updated user data:
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* - 'name' (string): The updated name of the user.
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* - 'email' (string): The updated email of the user.
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* - 'timezone' (string): The updated timezone of the user.
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* - 'bio' (string): The updated biography of the user.
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*
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* @return bool|string Returns true if the update is successful, or an error message if an exception occurs.
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*/
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public function editUser($user_id, $updatedUser) {
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try {
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$sql = 'UPDATE users_meta SET
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name = :name,
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email = :email,
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timezone = :timezone,
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bio = :bio
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WHERE user_id = :user_id';
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$query = $this->db->prepare($sql);
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$query->execute([
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':user_id' => $user_id,
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':name' => $updatedUser['name'],
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':email' => $updatedUser['email'],
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':timezone' => $updatedUser['timezone'],
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':bio' => $updatedUser['bio']
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]);
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return true;
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} catch (Exception $e) {
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return $e->getMessage();
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}
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}
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/**
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* Removes a user's avatar from the database and deletes the associated file.
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*
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* @param int $user_id The ID of the user whose avatar is being removed.
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* @param string $old_avatar Optional. The file path of the current avatar to delete. Default is an empty string.
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*
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* @return bool|string Returns true if the avatar is successfully removed, or an error message if an exception occurs.
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*/
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public function removeAvatar($user_id, $old_avatar = '') {
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try {
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// remove from database
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$sql = 'UPDATE users_meta SET
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avatar = NULL
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WHERE user_id = :user_id';
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$query = $this->db->prepare($sql);
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$query->execute([
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':user_id' => $user_id,
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]);
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// delete the old avatar file
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if ($old_avatar && file_exists($old_avatar)) {
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unlink($old_avatar);
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}
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return true;
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} catch (Exception $e) {
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return $e->getMessage();
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}
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}
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/**
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* Updates a user's avatar by uploading a new file and saving its path in the database.
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*
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* @param int $user_id The ID of the user whose avatar is being updated.
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* @param array $avatar_file The uploaded avatar file from the $_FILES array.
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* Should include 'tmp_name', 'name', 'error', etc.
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* @param string $avatars_path The directory path where avatar files should be saved.
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*
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* @return bool|string Returns true if the avatar is successfully updated, or an error message if an exception occurs.
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*/
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public function changeAvatar($user_id, $avatar_file, $avatars_path) {
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try {
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// check if the file was uploaded
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if (isset($avatar_file) && $avatar_file['error'] === UPLOAD_ERR_OK) {
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$fileTmpPath = $avatar_file['tmp_name'];
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$fileName = $avatar_file['name'];
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$fileExtension = strtolower(pathinfo($fileName, PATHINFO_EXTENSION));
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// validate file extension
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if (in_array($fileExtension, ['jpg', 'png', 'jpeg'])) {
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$newFileName = md5(time() . $fileName) . '.' . $fileExtension;
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$dest_path = $avatars_path . $newFileName;
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// move the file to avatars folder
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if (move_uploaded_file($fileTmpPath, $dest_path)) {
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try {
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// update user's avatar path in DB
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$sql = 'UPDATE users_meta SET
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avatar = :avatar
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WHERE user_id = :user_id';
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$query = $this->db->prepare($sql);
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$query->execute([
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':avatar' => $newFileName,
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':user_id' => $user_id
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]);
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// all went OK
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$_SESSION['notice'] .= 'Avatar updated successfully. ';
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return true;
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} catch (Exception $e) {
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return $e->getMessage();
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}
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} else {
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$_SESSION['error'] .= 'Error moving the uploaded file. ';
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}
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} else {
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$_SESSION['error'] .= 'Invalid avatar file type. ';
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}
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} else {
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$_SESSION['error'] .= 'Error uploading the avatar file. ';
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}
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} catch (Exception $e) {
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return $e->getMessage();
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}
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}
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}
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?>
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