feat: implemented most of the backend api for administrator

MyINPulse-back/src/main/java/enseirb/myinpulse/service/database/UserService.java

@@ -1,4 +1,76 @@
 package enseirb.myinpulse.service.database;
 
+import enseirb.myinpulse.model.User;
+import enseirb.myinpulse.repository.UserRepository;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Service;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.server.ResponseStatusException;
+
+import java.util.Optional;
+
+@Service
 public class UserService {
+    private final UserRepository userRepository;
+
+    @Autowired
+    UserService(UserRepository userRepository) {
+        this.userRepository = userRepository;
+    }
+
+    public Iterable<User> getAllUsers() {
+        return this.userRepository.findAll();
+    }
+
+    // TODO
+    public long getIdUserByEmail(String email) {
+        Optional<User> opt_user = this.userRepository.findByPrimaryMail(email);
+
+        if (opt_user.isEmpty()) {
+            System.err.println("Couldn't find user with email " + email);
+            throw new ResponseStatusException(HttpStatus.NOT_FOUND);
+        }
+        User user = opt_user.get();
+        return user.getIdUser();
+    }
+
+    public Iterable<User> allUsers() {
+        return this.userRepository.findAll();
+    }
+
+    public User addUser(@RequestBody User user) {
+        return this.userRepository.save(user);
+    }
+
+    public User updateUser(
+            @PathVariable Long id,
+            String userSurname,
+            String userName,
+            String mainMail,
+            String secondaryMail,
+            String phoneNumber) {
+        Optional<User> user = userRepository.findById(id);
+        if (user.isEmpty()) {
+            throw new ResponseStatusException(HttpStatus.NOT_FOUND, "Cet utilisateur n'existe pas");
+        }
+        if (userName != null) {
+            user.get().setUserName(userName);
+        }
+        if (userSurname != null) {
+            user.get().setUserSurname(userSurname);
+        }
+        if (mainMail != null) {
+            user.get().setPrimaryMail(mainMail);
+        }
+        if (secondaryMail != null) {
+            user.get().setSecondaryMail(secondaryMail);
+        }
+        if (phoneNumber != null) {
+            user.get().setPhoneNumber(phoneNumber);
+        }
+        return this.userRepository.save(user.get());
+    }
 }