add service methods

src/main/java/ru/ulstu/core/controller/AdviceController.java

@@ -23,11 +23,29 @@ import ru.ulstu.user.error.UserResetKeyError;
 
 import java.util.Set;
 import java.util.stream.Collectors;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.ModelAttribute;
+import ru.ulstu.user.service.UserService;
 
 @RestController
 @ControllerAdvice
 public class AdviceController {
+    private final static String USER_NAME_TEMPLATE = "%s %s %s";
     private final Logger log = LoggerFactory.getLogger(AdviceController.class);
+    private final UserService userService;
+
+
+    public AdviceController(UserService userService) {
+        this.userService = userService;
+    }
+    
+    @ModelAttribute
+    public void globalAttributes(Model model) {
+       model.addAttribute("currentUser", String.format(USER_NAME_TEMPLATE, 
+               userService.getCurrentUser().getLastName(), 
+               userService.getCurrentUser().getFirstName().substring(0, 1),
+               userService.getCurrentUser().getFirstName().substring(0, 1)));
+    }
         
     private Response<Void> handleException(ErrorConstants error) {
         log.warn(error.toString());

src/main/java/ru/ulstu/user/service/UserService.java

@@ -315,4 +315,13 @@ public class UserService implements UserDetailsService {
     public User findById(Integer id) {
         return userRepository.findOne(id);
     }
+        
+    public User getCurrentUser() {
+        String login = UserUtils.getCurrentUserLogin();
+        User user = userRepository.findOneByLoginIgnoreCase(login);
+        if (user == null) {
+            throw new UserNotFoundException(login);
+        }
+        return user;
+    }
 }

src/main/java/ru/ulstu/user/service/UserUtils.java

@@ -0,0 +1,34 @@
+package ru.ulstu.user.service;
+import org.apache.commons.lang3.RandomStringUtils;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.context.SecurityContext;
+import org.springframework.security.core.context.SecurityContextHolder;
+import org.springframework.security.core.userdetails.UserDetails;
+
+public class UserUtils {
+    private static final int DEF_COUNT = 20;
+
+    public static String generateActivationKey() {
+        return RandomStringUtils.randomNumeric(DEF_COUNT);
+    }
+
+    public static String generateResetKey() {
+        return RandomStringUtils.randomNumeric(DEF_COUNT);
+    }
+
+    public static String getCurrentUserLogin() {
+        final SecurityContext securityContext = SecurityContextHolder.getContext();
+        if (securityContext == null) {
+            return null;
+        }
+        final Authentication authentication = securityContext.getAuthentication();
+        if (authentication.getPrincipal() instanceof UserDetails) {
+            final UserDetails springSecurityUser = (UserDetails) authentication.getPrincipal();
+            return springSecurityUser.getUsername();
+        }
+        if (authentication.getPrincipal() instanceof String) {
+            return (String) authentication.getPrincipal();
+        }
+        return null;
+    }
+}