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src/main/java/stirling/software/SPDF/config/security/UserService.java

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+package stirling.software.SPDF.config.security;
+
+import java.util.Map;
+import java.util.Optional;
+import java.util.HashMap;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.security.crypto.password.PasswordEncoder;
+import org.springframework.stereotype.Service;
+
+import stirling.software.SPDF.repository.UserRepository;
+import stirling.software.SPDF.model.Authority;
+import stirling.software.SPDF.model.Role;
+import stirling.software.SPDF.model.User;
+@Service
+public class UserService {
+    
+    @Autowired
+    private UserRepository userRepository;
+
+    @Autowired
+    private PasswordEncoder passwordEncoder;
+
+    public void saveUser(String username, String password) {
+        User user = new User();
+        user.setUsername(username);
+        user.setPassword(passwordEncoder.encode(password));
+        user.setEnabled(true);
+        userRepository.save(user);
+    }
+
+    public void saveUser(String username, String password, String role) {
+        User user = new User();
+        user.setUsername(username);
+        user.setPassword(passwordEncoder.encode(password));
+        user.addAuthority(new Authority(role, user));
+        user.setEnabled(true);
+        userRepository.save(user);
+    }
+    
+    public void deleteUser(String username) {
+    	 Optional<User> userOpt = userRepository.findByUsername(username);
+         if (userOpt.isPresent()) {
+        	 userRepository.delete(userOpt.get());
+         }
+    }
+    
+    public boolean usernameExists(String username) {
+        return userRepository.findByUsername(username) != null;
+    }
+    
+    public boolean hasUsers() {
+        return userRepository.count() > 0;
+    }
+    
+    public void updateUserSettings(String username, Map<String, String> updates) {
+        Optional<User> userOpt = userRepository.findByUsername(username);
+        if (userOpt.isPresent()) {
+            User user = userOpt.get();
+            Map<String, String> settingsMap = user.getSettings();
+
+            if(settingsMap == null) {
+                settingsMap = new HashMap<String,String>();
+            } 
+            settingsMap.clear();
+            settingsMap.putAll(updates);
+            user.setSettings(settingsMap);
+
+            userRepository.save(user);
+        } 
+    }
+
+    
+}