优化目录结构

backend/src/main/java/com/openisle/service/LevelService.java

@@ -0,0 +1,90 @@
+package com.openisle.service;
+
+import com.openisle.model.User;
+import com.openisle.repository.UserRepository;
+import com.openisle.repository.ExperienceLogRepository;
+import com.openisle.model.ExperienceLog;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+
+import java.time.LocalDate;
+
+@Service
+@RequiredArgsConstructor
+public class LevelService {
+    private final UserRepository userRepository;
+    // repositories for experience-related entities
+    private final ExperienceLogRepository experienceLogRepository;
+    private final UserVisitService userVisitService;
+
+    private static final int[] LEVEL_EXP = {100,200,300,600,1200,10000};
+
+    private ExperienceLog getTodayLog(User user) {
+        LocalDate today = LocalDate.now();
+        return experienceLogRepository.findByUserAndLogDate(user, today)
+                .orElseGet(() -> {
+                    ExperienceLog log = new ExperienceLog();
+                    log.setUser(user);
+                    log.setLogDate(today);
+                    log.setPostCount(0);
+                    log.setCommentCount(0);
+                    log.setReactionCount(0);
+                    return experienceLogRepository.save(log);
+                });
+    }
+
+    private int addExperience(User user, int amount) {
+        user.setExperience(user.getExperience() + amount);
+        userRepository.save(user);
+        return amount;
+    }
+
+    public int awardForPost(String username) {
+        User user = userRepository.findByUsername(username).orElseThrow();
+        ExperienceLog log = getTodayLog(user);
+        if (log.getPostCount() > 1) return 0;
+        log.setPostCount(log.getPostCount() + 1);
+        experienceLogRepository.save(log);
+        return addExperience(user,30);
+    }
+
+    public int awardForComment(String username) {
+        User user = userRepository.findByUsername(username).orElseThrow();
+        ExperienceLog log = getTodayLog(user);
+        if (log.getCommentCount() > 3) return 0;
+        log.setCommentCount(log.getCommentCount() + 1);
+        experienceLogRepository.save(log);
+        return addExperience(user,10);
+    }
+
+    public int awardForReaction(String username) {
+        User user = userRepository.findByUsername(username).orElseThrow();
+        ExperienceLog log = getTodayLog(user);
+        if (log.getReactionCount() > 3) return 0;
+        log.setReactionCount(log.getReactionCount() + 1);
+        experienceLogRepository.save(log);
+        return addExperience(user,5);
+    }
+
+    public int awardForSignin(String username) {
+        boolean first = userVisitService.recordVisit(username);
+        if (!first) return 0;
+        User user = userRepository.findByUsername(username).orElseThrow();
+        return addExperience(user,5);
+    }
+
+    public int getLevel(int exp) {
+        int level = 0;
+        for (int t : LEVEL_EXP) {
+            if (exp >= t) level++; else break;
+        }
+        return level;
+    }
+
+    public int nextLevelExp(int exp) {
+        for (int t : LEVEL_EXP) {
+            if (exp < t) return t;
+        }
+        return LEVEL_EXP[LEVEL_EXP.length-1];
+    }
+}