Update client server

GoGreen/Server/src/main/java/gogreen/server/Application.java

@@ -0,0 +1,13 @@
+package gogreen.server;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+}
+

GoGreen/Server/src/main/java/gogreen/server/data/model/User.java

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+package gogreen.server.data.model;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+
+@Entity
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+public class User {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    Long id;
+    String name;
+    String password;
+}

GoGreen/Server/src/main/java/gogreen/server/data/repository/UserJpaRepository.java

@@ -0,0 +1,8 @@
+package gogreen.server.data.repository;
+
+import gogreen.server.data.model.User;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface UserJpaRepository extends UserRepository, JpaRepository<User,Long> {
+
+}

GoGreen/Server/src/main/java/gogreen/server/data/repository/UserRepository.java

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+package gogreen.server.data.repository;
+
+import gogreen.server.data.model.User;
+
+public interface UserRepository {
+    User findByName(String name);
+    <T extends User> T save(T user);
+}

GoGreen/Server/src/main/java/gogreen/server/rest/RestExceptionHandler.java

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+package gogreen.server.rest;
+
+import gogreen.common.ApplicationException;
+import gogreen.common.ErrorResponse;
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.ResponseStatus;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+
+@RestControllerAdvice
+public class RestExceptionHandler {
+    @ExceptionHandler(ApplicationException.class)
+    @ResponseStatus(HttpStatus.BAD_REQUEST)
+    public ErrorResponse applicationException (ApplicationException ex) {
+        return new ErrorResponse(ex.getMessage());
+    }
+}

GoGreen/Server/src/main/java/gogreen/server/rest/UserController.java

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+package gogreen.server.rest;
+
+import gogreen.common.UserDTO;
+import gogreen.server.service.UserService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class UserController {
+    @Autowired
+    UserService userService;
+
+    @RequestMapping("/registerUser")
+    public UserDTO registerUser(@RequestParam(value="name") String name,
+                                @RequestParam(value="password") String password) {
+        return userService.registerUser(name, password);
+    }
+
+    @RequestMapping("/login")
+    public UserDTO login(@RequestParam(value="name") String name,
+                         @RequestParam(value="password") String password) {
+        return userService.login(name, password);
+    }
+}

GoGreen/Server/src/main/java/gogreen/server/service/UserService.java

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+package gogreen.server.service;
+
+import gogreen.common.ApplicationException;
+import gogreen.common.UserDTO;
+import gogreen.server.data.model.User;
+import gogreen.server.data.repository.UserRepository;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class UserService {
+    Logger logger = LoggerFactory.getLogger(UserService.class);
+    @Autowired
+    UserRepository userRepository;
+
+    public UserDTO registerUser(String name, String password) {
+        User user = userRepository.findByName(name);
+        if (user != null) {
+            throw new ApplicationException("User already exists");
+        } else {
+            user = userRepository.save(new User(null, name, password));
+        }
+        logger.info("Created user id=" + user.getId() + ", name=" + user.getName());
+        return new UserDTO(user.getId(), user.getName());
+    }
+
+    public UserDTO login(String name, String password) {
+        User user = userRepository.findByName(name);
+        if (user == null) {
+            throw new ApplicationException("User does not exist");
+        } else {
+            if (!user.getPassword().equals(password)) {
+                throw new ApplicationException("Wrong password");
+            }
+        }
+        return new UserDTO(user.getId(), user.getName());
+    }
+}