318 lines
12 KiB
PHP
318 lines
12 KiB
PHP
<?php
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namespace php;
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use Exception;
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use Monolog\Logger;
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use PDO;
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/**
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* Manages interaction with the database in the context of users.
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*/
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// TODO: Remove duplication in this class
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class UserManager
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{
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/**
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* The maximum length of an email address.
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*/
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private const MAX_EMAIL_LENGTH = 254;
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/**
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* The minimum length of a password;
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*/
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private const MIN_PASSWORD_LENGTH = 8;
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/**
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* The maximum length of a password.
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*/
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private const MAX_PASSWORD_LENGTH = 255;
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/**
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* @var Logger The logger to use for logging.
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*/
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private Logger $logger;
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/**
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* @var string The filename of the database to interact with.
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*/
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private string $db_filename;
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/**
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* Constructs a new user manager.
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*
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* @param Logger $logger the logger to use for logging
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* @param string $db_filename the filename of the database to interact with
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*/
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public function __construct(Logger $logger, string $db_filename)
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{
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$this->logger = $logger;
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$this->db_filename = $db_filename;
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}
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/**
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* Populates the database with the necessary structures for users.
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*
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* @return void
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*/
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public function install(): void
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{
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$conn = Database::connect($this->db_filename);
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$conn->exec("CREATE TABLE users(uuid text primary key not null, email text not null,
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password text not null, password_update_time int not null);");
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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 $email The user-submitted email address.
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* @param string $password The user-submitted password.
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* @param string $password_confirm The user-submitted password confirmation.
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* @return Response a response with message `null` if the user was registered, or a response with a message
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* explaining what went wrong otherwise
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*/
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public function register(string $email, string $password, string $password_confirm): Response
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{
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// Generate UUID
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try {
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$uuid = bin2hex(random_bytes(16));
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} catch (Exception $exception) {
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$this->logger->emergency("Failed to generate UUID.", [$exception]);
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return new Response(payload: ["target" => null, "message" => "Failed to generate UUID."], satisfied: false);
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}
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// Validate
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if (!filter_var($email, FILTER_VALIDATE_EMAIL) || strlen($email) > self::MAX_EMAIL_LENGTH)
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return new Response(
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payload: ["target" => "email", "message" => "Invalid email address."],
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satisfied: false
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);
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if (strlen($password) < self::MIN_PASSWORD_LENGTH || strlen($password) > self::MAX_PASSWORD_LENGTH)
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return new Response(
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payload: [
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"target" => "password",
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"message" => "Your password should be at least 8 and at most 255 characters long."
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],
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satisfied: false
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);
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if ($password !== $password_confirm)
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return new Response(
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payload: ["target" => "passwordConfirm", "message" => "Passwords do not match."],
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satisfied: false
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);
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// Connect
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$conn = Database::connect($this->db_filename);
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$conn->beginTransaction();
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// Check if email address is already in use
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$stmt = $conn->prepare("SELECT COUNT(*) as count FROM users WHERE email=:email;");
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$stmt->bindValue(":email", $email);
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$stmt->execute();
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$result = $stmt->fetch(PDO::FETCH_ASSOC);
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if ($result["count"] > 0) {
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$conn->rollBack();
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return new Response(
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payload: ["target" => "email", "message" => "Email address already in use."],
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satisfied: false
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);
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}
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// Register user
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$stmt = $conn->prepare("INSERT INTO users (uuid, email, password, password_update_time)
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VALUES (:uuid, :email, :password, unixepoch());");
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$stmt->bindValue(":uuid", $uuid);
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$stmt->bindValue(":email", $email);
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$stmt->bindValue(":password", password_hash($password, PASSWORD_DEFAULT));
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$stmt->execute();
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// Respond
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$conn->commit();
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return new Response(payload: null, satisfied: true);
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}
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/**
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* Deletes the user with the given UUID.
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*
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* @param string $uuid the UUID of the user to delete
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* @return Response a response with message `null` if the user was deleted, or a response with a message explaining
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* what went wrong otherwise
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*/
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public function delete(string $uuid): Response
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{
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$conn = Database::connect($this->db_filename);
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$stmt = $conn->prepare("DELETE FROM users WHERE uuid=:uuid;");
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$stmt->bindValue(":uuid", $uuid);
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$stmt->execute();
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return new Response(payload: null, satisfied: true);
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}
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/**
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* Validates a login attempt with the given email address and password.
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*
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* @param string $email the email address of the user whose password should be checked
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* @param string $password the password to check against the specified user
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* @return Response a response with user data if the login was successful, or a response with a message explaining
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* what went wrong otherwise
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*/
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public function check_login(string $email, string $password): Response
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{
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if (!filter_var($email, FILTER_VALIDATE_EMAIL) || strlen($email) > self::MAX_EMAIL_LENGTH)
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return new Response(
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payload: ["target" => "email", "message" => "Invalid email address."],
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satisfied: false
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);
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if (strlen($password) > self::MAX_PASSWORD_LENGTH)
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return new Response(
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payload: ["target" => "password", "message" => "Incorrect combination of email and password."],
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satisfied: false
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);
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$conn = Database::connect($this->db_filename);
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$stmt = $conn->prepare("SELECT uuid, email, password, password_update_time FROM users WHERE email=:email;");
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$stmt->bindValue(":email", $email);
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$stmt->execute();
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$results = $stmt->fetchAll(PDO::FETCH_ASSOC);
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if (sizeof($results) === 0 || !password_verify($password, $results[0]["password"])) {
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return new Response(
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payload: ["target" => "password", "message" => "Incorrect combination of email and password."],
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satisfied: false
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);
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}
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$user = $results[0];
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unset($user["password"]);
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return new Response(payload: $user, satisfied: true);
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}
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/**
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* Returns the user with the given UUID.
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*
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* @param string $uuid the UUID of the user to return
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* @return Response the user with the given UUID, or a response with an explanation what went wrong otherwise
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*/
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public function get_user_data(string $uuid): Response
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{
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$conn = Database::connect($this->db_filename);
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$stmt = $conn->prepare("SELECT uuid, email, password_update_time FROM users WHERE uuid=:uuid;");
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$stmt->bindValue(":uuid", $uuid);
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$stmt->execute();
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$user = $stmt->fetch(PDO::FETCH_ASSOC);
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if ($user === false)
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return new Response(
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payload: ["target" => "uuid", "message" => "Something went wrong. Please try logging in again."],
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satisfied: false
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);
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return new Response(payload: $user, satisfied: true);
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}
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/**
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* Updates the indicated user's email address.
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*
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* @param string $uuid the UUID of the user whose email address should be updated
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* @param string $email the new email address
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* @return Response a response with message `null` if the email address was updated, or a response with a message
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* explaining what went wrong otherwise
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*/
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public function set_email(string $uuid, string $email): Response
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{
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// Validate
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if (!filter_var($email, FILTER_VALIDATE_EMAIL) || strlen($email) > self::MAX_EMAIL_LENGTH)
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return new Response(
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payload: ["target" => "email", "message" => "Invalid email address."],
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satisfied: false
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);
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// Connect
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$conn = Database::connect($this->db_filename);
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$conn->beginTransaction();
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// Check if email address is already in use
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$stmt = $conn->prepare("SELECT COUNT(*) as count FROM users WHERE email=:email;");
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$stmt->bindValue(":email", $email);
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$stmt->execute();
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if ($stmt->fetch(PDO::FETCH_ASSOC)["count"] > 0) {
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$conn->rollBack();
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return new Response(
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payload: ["target" => "email", "message" => "Email address already in use."],
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satisfied: false
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);
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}
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// Update email address
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$stmt = $conn->prepare("UPDATE users SET email=:email WHERE uuid=:uuid;");
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$stmt->bindValue(":uuid", $uuid);
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$stmt->bindValue(":email", $email);
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$stmt->execute();
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// Respond
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$conn->commit();
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return new Response(payload: null, satisfied: true);
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}
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/**
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* Updates the indicated user's password.
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*
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* @param string $uuid the UUID of the user whose password should be updated
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* @param string $password_old the old password
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* @param string $password_new the new password
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* @param string $password_confirm the confirmation of the new password
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* @return Response a response with message `null` if the password was updated, or a response with a message
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* explaining what went wrong otherwise
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*/
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public function set_password(string $uuid, string $password_old, string $password_new,
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string $password_confirm): Response
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{
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// Validate
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if (strlen($password_old) > self::MAX_PASSWORD_LENGTH)
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return new Response(
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payload: ["target" => "passwordOld", "message" => "Incorrect old password."],
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satisfied: false
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);
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if (strlen($password_new) < self::MIN_PASSWORD_LENGTH || strlen($password_new) > self::MAX_PASSWORD_LENGTH)
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return new Response(
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payload: [
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"target" => "passwordNew",
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"message" => "Your password should be at least 8 and at most 255 characters long."
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],
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satisfied: false
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);
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if ($password_new !== $password_confirm)
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return new Response(
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payload: ["target" => "passwordConfirm", "message" => "New passwords do not match."],
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satisfied: false
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);
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// Connect
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$conn = Database::connect($this->db_filename);
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$conn->beginTransaction();
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// Validate old password
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$stmt = $conn->prepare("SELECT password FROM users WHERE uuid=:uuid;");
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$stmt->bindValue(":uuid", $uuid);
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$stmt->execute();
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$user = $stmt->fetch(PDO::FETCH_ASSOC);
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if (!password_verify($password_old, $user["password"])) {
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$conn->rollBack();
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return new Response(
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payload: ["target" => "passwordOld", "message" => "Incorrect old password."],
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satisfied: false
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);
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}
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// Update password
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$stmt = $conn->prepare("UPDATE users SET password=:password, password_update_time=unixepoch()
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WHERE uuid=:uuid;");
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$stmt->bindValue(":uuid", $uuid);
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$stmt->bindValue(":password", password_hash($password_new, PASSWORD_DEFAULT));
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$stmt->execute();
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// Respond
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$conn->commit();
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return new Response(payload: null, satisfied: true);
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}
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}
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