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package com.ufund.api.ufundapi.service;
import java.io.IOException;
import org.springframework.stereotype.Component;
import com.ufund.api.ufundapi.model.User;
import com.ufund.api.ufundapi.model.UserAuth;
import com.ufund.api.ufundapi.persistence.UserAuthDAO;
@Component
public class AuthService {
private final UserAuthDAO userAuthDAO;
private final UserService userService;
public AuthService(UserAuthDAO userAuthDAO, UserService userService) {
this.userAuthDAO = userAuthDAO;
this.userService = userService;
}
/**
* Check if the provided key has access to the provided user.
*
* @param targetUsername The targetUsername of the user trying to be accessed.
* @param key The api key obtained by the client from logging in.
* @throws IllegalAccessException Thrown if access was denied to the user.
* @throws IOException Thrown on a file writing issue
*/
public void keyHasAccessToUser(String targetUsername, String key) throws IllegalAccessException, IOException {
var userAuth = userAuthDAO.getUserAuth(key);
if (userAuth == null) {
throw new IllegalAccessException("Invalid authentication key");
}
var username = userAuth.getUsername();
var userType = userService.getUser(username).getType();
if (!username.equals(targetUsername) && userType != User.UserType.MANAGER) {
throw new IllegalAccessException("Provided key does not grant access to perform the requested operation");
}
}
/**
* Check if the provided key is valid
* @param key The api key obtained by the client from logging in.
* @throws IllegalAccessException Thrown if access was denied to the user.
* @throws IOException Thrown on a file writing issue
*/
public void keyIsValid(String key) throws IOException, IllegalAccessException {
var userAuth = userAuthDAO.getUserAuth(key);
if (userAuth == null) {
throw new IllegalAccessException("Invalid authentication key");
}
}
/**
* Check if the provided key has access to edit the cupboard
* @param key The api key obtained by the client from logging in.
* @throws IllegalAccessException Thrown if access was denied to the user.
* @throws IOException Thrown on a file writing issue
*/
public void keyHasAccessToCupboard(String key) throws IOException, IllegalAccessException {
var userAuth = userAuthDAO.getUserAuth(key);
if (userAuth == null) {
throw new IllegalAccessException("Invalid authentication key");
}
var username = userAuth.getUsername();
var userType = userService.getUser(username).getType();
if (userType != User.UserType.MANAGER) {
throw new IllegalAccessException("Provided key does not grant access to perform the requested operation");
}
}
/**
* Attempt to log in with the provided credentials
*
* @param username The username of the user
* @param password The password of the user
* @return An API key if the authentication was successful.
* @throws IllegalAccessException Thrown if the username or password was incorrect
* @throws IOException If there was an issue saving the authentication
*/
public String login(String username, String password) throws IllegalAccessException, IOException {
var usr = userService.getUser(username);
if (usr == null || !usr.verifyPassword(password)) {
throw new IllegalAccessException("Incorrect username or password");
}
var userAuth = UserAuth.generate(username);
userAuthDAO.addUserAuth(userAuth);
return userAuth.getKey();
}
/**
* Logs out the current user
*
* @param key The API key to of the client
* @throws IOException Thrown if there was an error saving the authentication
*/
public void logout(String key) throws IOException {
userAuthDAO.removeUserAuth(key);
}
}
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