Merge pull request #470 from nagisa77/codex/add-lottery-post-type-and-api

feat: add lottery post type with participation API
2026-02-23 14:40:49 +08:00 · 2025-08-11 09:56:45 +08:00
parent ae1a8daa22 5360529327
commit 692fc6d1d0
17 changed files with 736 additions and 17 deletions
--- a/backend/src/main/java/com/openisle/config/SchedulerConfig.java
+++ b/backend/src/main/java/com/openisle/config/SchedulerConfig.java
@@ -0,0 +1,20 @@
+package com.openisle.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.scheduling.annotation.EnableScheduling;
+import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;
+import org.springframework.scheduling.TaskScheduler;
+
+@Configuration
+@EnableScheduling
+public class SchedulerConfig {
+    @Bean
+    public TaskScheduler taskScheduler() {
+        ThreadPoolTaskScheduler scheduler = new ThreadPoolTaskScheduler();
+        scheduler.setPoolSize(2);
+        scheduler.setThreadNamePrefix("lottery-");
+        scheduler.initialize();
+        return scheduler;
+    }
+}
--- a/backend/src/main/java/com/openisle/controller/PostController.java
+++ b/backend/src/main/java/com/openisle/controller/PostController.java
@@ -39,7 +39,9 @@ public class PostController {
            return ResponseEntity.badRequest().build();
        }
        Post post = postService.createPost(auth.getName(), req.getCategoryId(),
-                req.getTitle(), req.getContent(), req.getTagIds());
+                req.getTitle(), req.getContent(), req.getTagIds(),
+                req.getType(), req.getPrizeDescription(), req.getPrizeIcon(),
+                req.getPrizeCount(), req.getStartTime(), req.getEndTime());
        draftService.deleteDraft(auth.getName());
        PostDetailDto dto = postMapper.toDetailDto(post, auth.getName());
        dto.setReward(levelService.awardForPost(auth.getName()));
@@ -67,6 +69,12 @@ public class PostController {
        return ResponseEntity.ok(postMapper.toDetailDto(post, viewer));
    }

+    @PostMapping("/{id}/lottery/join")
+    public ResponseEntity<Void> joinLottery(@PathVariable Long id, Authentication auth) {
+        postService.joinLottery(id, auth.getName());
+        return ResponseEntity.ok().build();
+    }
+
    @GetMapping
    public List<PostSummaryDto> listPosts(@RequestParam(value = "categoryId", required = false) Long categoryId,
                                   @RequestParam(value = "categoryIds", required = false) List<Long> categoryIds,
--- a/backend/src/main/java/com/openisle/dto/LotteryDto.java
+++ b/backend/src/main/java/com/openisle/dto/LotteryDto.java
@@ -0,0 +1,17 @@
+package com.openisle.dto;
+
+import lombok.Data;
+import java.time.LocalDateTime;
+import java.util.List;
+
+/** Metadata for lottery posts. */
+@Data
+public class LotteryDto {
+    private String prizeDescription;
+    private String prizeIcon;
+    private int prizeCount;
+    private LocalDateTime startTime;
+    private LocalDateTime endTime;
+    private List<AuthorDto> participants;
+    private List<AuthorDto> winners;
+}
--- a/backend/src/main/java/com/openisle/dto/PostRequest.java
+++ b/backend/src/main/java/com/openisle/dto/PostRequest.java
@@ -2,8 +2,11 @@ package com.openisle.dto;

 import lombok.Data;

+import java.time.LocalDateTime;
 import java.util.List;

+import com.openisle.model.PostType;
+
 /**
 * Request body for creating or updating a post.
 */
@@ -14,5 +17,13 @@ public class PostRequest {
    private String content;
    private List<Long> tagIds;
    private String captcha;
+
+    // optional for lottery posts
+    private PostType type;
+    private String prizeDescription;
+    private String prizeIcon;
+    private Integer prizeCount;
+    private LocalDateTime startTime;
+    private LocalDateTime endTime;
 }

--- a/backend/src/main/java/com/openisle/dto/PostSummaryDto.java
+++ b/backend/src/main/java/com/openisle/dto/PostSummaryDto.java
@@ -1,6 +1,7 @@
 package com.openisle.dto;

 import com.openisle.model.PostStatus;
+import com.openisle.model.PostType;
 import lombok.Data;

 import java.time.LocalDateTime;
@@ -28,5 +29,7 @@ public class PostSummaryDto {
    private boolean subscribed;
    private int reward;
    private int pointReward;
+    private PostType type;
+    private LotteryDto lottery;
 }

--- a/backend/src/main/java/com/openisle/mapper/PostMapper.java
+++ b/backend/src/main/java/com/openisle/mapper/PostMapper.java
@@ -4,8 +4,10 @@ import com.openisle.dto.CommentDto;
 import com.openisle.dto.PostDetailDto;
 import com.openisle.dto.PostSummaryDto;
 import com.openisle.dto.ReactionDto;
+import com.openisle.dto.LotteryDto;
 import com.openisle.model.CommentSort;
 import com.openisle.model.Post;
+import com.openisle.model.LotteryPost;
 import com.openisle.model.User;
 import com.openisle.service.CommentService;
 import com.openisle.service.ReactionService;
@@ -75,5 +77,18 @@ public class PostMapper {
        dto.setLastReplyAt(last != null ? last : post.getCreatedAt());
        dto.setReward(0);
        dto.setSubscribed(false);
+        dto.setType(post.getType());
+
+        if (post instanceof LotteryPost lp) {
+            LotteryDto l = new LotteryDto();
+            l.setPrizeDescription(lp.getPrizeDescription());
+            l.setPrizeIcon(lp.getPrizeIcon());
+            l.setPrizeCount(lp.getPrizeCount());
+            l.setStartTime(lp.getStartTime());
+            l.setEndTime(lp.getEndTime());
+            l.setParticipants(lp.getParticipants().stream().map(userMapper::toAuthorDto).collect(Collectors.toList()));
+            l.setWinners(lp.getWinners().stream().map(userMapper::toAuthorDto).collect(Collectors.toList()));
+            dto.setLottery(l);
+        }
    }
 }
--- a/backend/src/main/java/com/openisle/model/LotteryPost.java
+++ b/backend/src/main/java/com/openisle/model/LotteryPost.java
@@ -0,0 +1,46 @@
+package com.openisle.model;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+import java.time.LocalDateTime;
+import java.util.HashSet;
+import java.util.Set;
+
+@Entity
+@Table(name = "lottery_posts")
+@Getter
+@Setter
+@NoArgsConstructor
+@PrimaryKeyJoinColumn(name = "post_id")
+public class LotteryPost extends Post {
+
+    @Column
+    private String prizeDescription;
+
+    @Column
+    private String prizeIcon;
+
+    @Column(nullable = false)
+    private int prizeCount;
+
+    @Column
+    private LocalDateTime startTime;
+
+    @Column
+    private LocalDateTime endTime;
+
+    @ManyToMany
+    @JoinTable(name = "lottery_participants",
+            joinColumns = @JoinColumn(name = "post_id"),
+            inverseJoinColumns = @JoinColumn(name = "user_id"))
+    private Set<User> participants = new HashSet<>();
+
+    @ManyToMany
+    @JoinTable(name = "lottery_winners",
+            joinColumns = @JoinColumn(name = "post_id"),
+            inverseJoinColumns = @JoinColumn(name = "user_id"))
+    private Set<User> winners = new HashSet<>();
+}
--- a/backend/src/main/java/com/openisle/model/Post.java
+++ b/backend/src/main/java/com/openisle/model/Post.java
@@ -9,11 +9,11 @@ import org.hibernate.annotations.CreationTimestamp;
 import java.util.HashSet;
 import java.util.Set;

+import java.time.LocalDateTime;
+
 import com.openisle.model.Tag;


-import java.time.LocalDateTime;
-
 /**
 * Post entity representing an article posted by a user.
 */
@@ -22,6 +22,7 @@ import java.time.LocalDateTime;
@Setter
@NoArgsConstructor
@Table(name = "posts")
+@Inheritance(strategy = InheritanceType.JOINED)
 public class Post {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
@@ -59,6 +60,10 @@ public class Post {
    @Column(nullable = false)
    private PostStatus status = PostStatus.PUBLISHED;

+    @Enumerated(EnumType.STRING)
+    @Column(nullable = false)
+    private PostType type = PostType.NORMAL;
+
    @Column
    private LocalDateTime pinnedAt;

--- a/backend/src/main/java/com/openisle/model/PostType.java
+++ b/backend/src/main/java/com/openisle/model/PostType.java
@@ -0,0 +1,6 @@
+package com.openisle.model;
+
+public enum PostType {
+    NORMAL,
+    LOTTERY
+}
--- a/backend/src/main/java/com/openisle/repository/LotteryPostRepository.java
+++ b/backend/src/main/java/com/openisle/repository/LotteryPostRepository.java
@@ -0,0 +1,7 @@
+package com.openisle.repository;
+
+import com.openisle.model.LotteryPost;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface LotteryPostRepository extends JpaRepository<LotteryPost, Long> {
+}
--- a/backend/src/main/java/com/openisle/service/PostService.java
+++ b/backend/src/main/java/com/openisle/service/PostService.java
@@ -2,12 +2,15 @@ package com.openisle.service;

 import com.openisle.model.Post;
 import com.openisle.model.PostStatus;
+import com.openisle.model.PostType;
 import com.openisle.model.PublishMode;
 import com.openisle.model.User;
 import com.openisle.model.Category;
 import com.openisle.model.Comment;
 import com.openisle.model.NotificationType;
+import com.openisle.model.LotteryPost;
 import com.openisle.repository.PostRepository;
+import com.openisle.repository.LotteryPostRepository;
 import com.openisle.repository.UserRepository;
 import com.openisle.repository.CategoryRepository;
 import com.openisle.repository.TagRepository;
@@ -21,6 +24,8 @@ import com.openisle.model.Role;
 import com.openisle.exception.RateLimitException;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.stereotype.Service;
+import org.springframework.scheduling.TaskScheduler;
+import com.openisle.service.EmailSender;

 import java.util.List;
 import org.springframework.data.domain.PageRequest;
@@ -28,12 +33,19 @@ import org.springframework.data.domain.Pageable;
 import org.springframework.data.domain.Sort;
 import org.springframework.transaction.annotation.Transactional;

+import java.time.ZoneId;
+import java.time.LocalDateTime;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashSet;
+
@Service
 public class PostService {
    private final PostRepository postRepository;
    private final UserRepository userRepository;
    private final CategoryRepository categoryRepository;
    private final TagRepository tagRepository;
+    private final LotteryPostRepository lotteryPostRepository;
    private PublishMode publishMode;
    private final NotificationService notificationService;
    private final SubscriptionService subscriptionService;
@@ -44,12 +56,15 @@ public class PostService {
    private final NotificationRepository notificationRepository;
    private final PostReadService postReadService;
    private final ImageUploader imageUploader;
+    private final TaskScheduler taskScheduler;
+    private final EmailSender emailSender;

    @org.springframework.beans.factory.annotation.Autowired
    public PostService(PostRepository postRepository,
                       UserRepository userRepository,
                       CategoryRepository categoryRepository,
                       TagRepository tagRepository,
+                       LotteryPostRepository lotteryPostRepository,
                       NotificationService notificationService,
                       SubscriptionService subscriptionService,
                       CommentService commentService,
@@ -59,11 +74,14 @@ public class PostService {
                       NotificationRepository notificationRepository,
                       PostReadService postReadService,
                       ImageUploader imageUploader,
+                       TaskScheduler taskScheduler,
+                       EmailSender emailSender,
                       @Value("${app.post.publish-mode:DIRECT}") PublishMode publishMode) {
        this.postRepository = postRepository;
        this.userRepository = userRepository;
        this.categoryRepository = categoryRepository;
        this.tagRepository = tagRepository;
+        this.lotteryPostRepository = lotteryPostRepository;
        this.notificationService = notificationService;
        this.subscriptionService = subscriptionService;
        this.commentService = commentService;
@@ -73,6 +91,8 @@ public class PostService {
        this.notificationRepository = notificationRepository;
        this.postReadService = postReadService;
        this.imageUploader = imageUploader;
+        this.taskScheduler = taskScheduler;
+        this.emailSender = emailSender;
        this.publishMode = publishMode;
    }

@@ -88,7 +108,13 @@ public class PostService {
                           Long categoryId,
                           String title,
                           String content,
-                           java.util.List<Long> tagIds) {
+                           java.util.List<Long> tagIds,
+                           PostType type,
+                           String prizeDescription,
+                           String prizeIcon,
+                           Integer prizeCount,
+                           LocalDateTime startTime,
+                           LocalDateTime endTime) {
        long recent = postRepository.countByAuthorAfter(username,
                java.time.LocalDateTime.now().minusMinutes(5));
        if (recent >= 1) {
@@ -108,14 +134,31 @@ public class PostService {
        if (tags.isEmpty()) {
            throw new IllegalArgumentException("Tag not found");
        }
-        Post post = new Post();
+        PostType actualType = type != null ? type : PostType.NORMAL;
+        Post post;
+        if (actualType == PostType.LOTTERY) {
+            LotteryPost lp = new LotteryPost();
+            lp.setPrizeDescription(prizeDescription);
+            lp.setPrizeIcon(prizeIcon);
+            lp.setPrizeCount(prizeCount != null ? prizeCount : 0);
+            lp.setStartTime(startTime);
+            lp.setEndTime(endTime);
+            post = lp;
+        } else {
+            post = new Post();
+        }
+        post.setType(actualType);
        post.setTitle(title);
        post.setContent(content);
        post.setAuthor(author);
        post.setCategory(category);
-        post.setTags(new java.util.HashSet<>(tags));
+        post.setTags(new HashSet<>(tags));
        post.setStatus(publishMode == PublishMode.REVIEW ? PostStatus.PENDING : PostStatus.PUBLISHED);
-        post = postRepository.save(post);
+        if (post instanceof LotteryPost) {
+            post = lotteryPostRepository.save((LotteryPost) post);
+        } else {
+            post = postRepository.save(post);
+        }
        imageUploader.addReferences(imageUploader.extractUrls(content));
        if (post.getStatus() == PostStatus.PENDING) {
            java.util.List<User> admins = userRepository.findByRole(com.openisle.model.Role.ADMIN);
@@ -141,9 +184,42 @@ public class PostService {
            }
        }
        notificationService.notifyMentions(content, author, post, null);
+
+        if (post instanceof LotteryPost lp && lp.getEndTime() != null) {
+            taskScheduler.schedule(() -> finalizeLottery(lp.getId()),
+                    java.util.Date.from(lp.getEndTime().atZone(ZoneId.systemDefault()).toInstant()));
+        }
        return post;
    }

+    public void joinLottery(Long postId, String username) {
+        LotteryPost post = lotteryPostRepository.findById(postId)
+                .orElseThrow(() -> new com.openisle.exception.NotFoundException("Post not found"));
+        User user = userRepository.findByUsername(username)
+                .orElseThrow(() -> new com.openisle.exception.NotFoundException("User not found"));
+        post.getParticipants().add(user);
+        lotteryPostRepository.save(post);
+    }
+
+    private void finalizeLottery(Long postId) {
+        lotteryPostRepository.findById(postId).ifPresent(lp -> {
+            List<User> participants = new ArrayList<>(lp.getParticipants());
+            if (participants.isEmpty()) {
+                return;
+            }
+            Collections.shuffle(participants);
+            int winnersCount = Math.min(lp.getPrizeCount(), participants.size());
+            java.util.Set<User> winners = new java.util.HashSet<>(participants.subList(0, winnersCount));
+            lp.setWinners(winners);
+            lotteryPostRepository.save(lp);
+            for (User w : winners) {
+                if (w.getEmail() != null) {
+                    emailSender.sendEmail(w.getEmail(), "你中奖了", "恭喜你在抽奖贴 \"" + lp.getTitle() + "\" 中获奖");
+                }
+            }
+        });
+    }
+
    @Transactional
    public Post viewPost(Long id, String viewer) {
        Post post = postRepository.findById(id)
--- a/frontend_nuxt/components/PostTypeSelect.vue
+++ b/frontend_nuxt/components/PostTypeSelect.vue
@@ -0,0 +1,46 @@
+<template>
+  <Dropdown v-model="selected" :fetch-options="fetchTypes" placeholder="选择帖子类型" :initial-options="providedOptions" />
+</template>
+
+<script>
+import { computed, ref, watch } from 'vue'
+import Dropdown from '~/components/Dropdown.vue'
+
+export default {
+  name: 'PostTypeSelect',
+  components: { Dropdown },
+  props: {
+    modelValue: { type: String, default: 'NORMAL' },
+    options: { type: Array, default: () => [] }
+  },
+  emits: ['update:modelValue'],
+  setup(props, { emit }) {
+    const providedOptions = ref(Array.isArray(props.options) ? [...props.options] : [])
+
+    watch(
+      () => props.options,
+      val => {
+        providedOptions.value = Array.isArray(val) ? [...val] : []
+      }
+    )
+
+    const fetchTypes = async () => {
+      return [
+        { id: 'NORMAL', name: '普通帖子', icon: 'fa-regular fa-file' },
+        { id: 'LOTTERY', name: '抽奖帖子', icon: 'fa-solid fa-gift' }
+      ]
+    }
+
+    const selected = computed({
+      get: () => props.modelValue,
+      set: v => emit('update:modelValue', v)
+    })
+
+    return { fetchTypes, selected, providedOptions }
+  }
+}
+</script>
+
+<style scoped>
+</style>
+
--- a/frontend_nuxt/main.js
+++ b/frontend_nuxt/main.js
@@ -1,5 +1,5 @@
-export const API_BASE_URL = 'https://www.open-isle.com'
-// export const API_BASE_URL = 'http://127.0.0.1:8081'
+// export const API_BASE_URL = 'https://www.open-isle.com'
+export const API_BASE_URL = 'http://127.0.0.1:8081'
 // export const API_BASE_URL = 'http://30.211.97.238:8081'
 export const GOOGLE_CLIENT_ID = '777830451304-nt8afkkap18gui4f9entcha99unal744.apps.googleusercontent.com'
 export const GITHUB_CLIENT_ID = 'Ov23liVkO1NPAX5JyWxJ'
--- a/frontend_nuxt/package-lock.json
+++ b/frontend_nuxt/package-lock.json
@@ -8,6 +8,7 @@
      "dependencies": {
        "cropperjs": "^1.6.2",
        "echarts": "^5.6.0",
+        "flatpickr": "^4.6.13",
        "highlight.js": "^11.11.1",
        "ldrs": "^1.0.0",
        "markdown-it": "^14.1.0",
@@ -16,6 +17,7 @@
        "vditor": "^3.11.1",
        "vue-easy-lightbox": "^1.19.0",
        "vue-echarts": "^7.0.3",
+        "vue-flatpickr-component": "^12.0.0",
        "vue-toastification": "^2.0.0-rc.5"
      }
    },
@@ -4868,6 +4870,12 @@
        "url": "https://github.com/sponsors/sindresorhus"
      }
    },
+    "node_modules/flatpickr": {
+      "version": "4.6.13",
+      "resolved": "https://registry.npmjs.org/flatpickr/-/flatpickr-4.6.13.tgz",
+      "integrity": "sha512-97PMG/aywoYpB4IvbvUJi0RQi8vearvU0oov1WW3k0WZPBMrTQVqekSX5CjSG/M4Q3i6A/0FKXC7RyAoAUUSPw==",
+      "license": "MIT"
+    },
    "node_modules/fn.name": {
      "version": "1.1.0",
      "license": "MIT"
@@ -10227,6 +10235,21 @@
        }
      }
    },
+    "node_modules/vue-flatpickr-component": {
+      "version": "12.0.0",
+      "resolved": "https://registry.npmjs.org/vue-flatpickr-component/-/vue-flatpickr-component-12.0.0.tgz",
+      "integrity": "sha512-CJ5jrgTaeD66Z4mjEocSTAdB/n6IGSlUICwdBanpyCI8hswq5rwXvEYQ5IKA3K3uVjP5pBlY9Rg6o3xoszTPpA==",
+      "license": "MIT",
+      "dependencies": {
+        "flatpickr": "^4.6.13"
+      },
+      "engines": {
+        "node": ">=14.13.0"
+      },
+      "peerDependencies": {
+        "vue": "^3.2.0"
+      }
+    },
    "node_modules/vue-router": {
      "version": "4.5.1",
      "license": "MIT",
--- a/frontend_nuxt/package.json
+++ b/frontend_nuxt/package.json
@@ -19,6 +19,8 @@
    "vditor": "^3.11.1",
    "vue-easy-lightbox": "^1.19.0",
    "vue-echarts": "^7.0.3",
-    "vue-toastification": "^2.0.0-rc.5"
+    "vue-toastification": "^2.0.0-rc.5",
+    "flatpickr": "^4.6.13",
+    "vue-flatpickr-component": "^12.0.0"
  }
 }
--- a/frontend_nuxt/pages/new-post.vue
+++ b/frontend_nuxt/pages/new-post.vue
@@ -10,6 +10,7 @@
        <div class="post-options-left">
          <CategorySelect v-model="selectedCategory" />
          <TagSelect v-model="selectedTags" creatable />
+          <PostTypeSelect v-model="postType" />
        </div>
        <div class="post-options-right">
          <div class="post-clear" @click="clearPost">
@@ -32,31 +33,100 @@
          <div v-else class="post-submit-loading"> <i class="fa-solid fa-spinner fa-spin"></i> 发布中...</div>
        </div>
      </div>
+      <div v-if="postType === 'LOTTERY'" class="lottery-section">
+        <AvatarCropper
+          :src="tempPrizeIcon"
+          :show="showPrizeCropper"
+          @close="showPrizeCropper = false"
+          @crop="onPrizeCropped"
+        />
+        <div class="prize-row">
+          <label class="prize-container">
+            <img v-if="prizeIcon" :src="prizeIcon" class="prize-preview" alt="prize" />
+            <i v-else class="fa-solid fa-image default-prize-icon"></i>
+            <div class="prize-overlay">上传奖品图片</div>
+            <input type="file" class="prize-input" accept="image/*" @change="onPrizeIconChange" />
+          </label>
+        </div>
+        <div class="prize-name-row">
+          <span>奖品描述</span>
+          <input class="prize-name-input" v-model="prizeDescription" placeholder="奖品描述" />
+        </div>
+        <div class="prize-count-row">
+          <span>奖品数量</span>
+          <div class="prize-count-input">
+            <input class="prize-count-input-field" type="number" v-model.number="prizeCount" min="1" />
+          </div>
+        </div>
+        <div class="prize-time-row">
+          <span>抽奖结束时间</span>
+          <client-only>
+            <flat-pickr v-model="endTime" :config="dateConfig" class="time-picker" />
+          </client-only>
+        </div>
+      </div>
    </div>
  </div>
 </template>

 <script>
-import { ref, onMounted, computed } from 'vue'
+import { ref, onMounted, computed, watch } from 'vue'
 import PostEditor from '../components/PostEditor.vue'
 import CategorySelect from '../components/CategorySelect.vue'
 import TagSelect from '../components/TagSelect.vue'
+import PostTypeSelect from '../components/PostTypeSelect.vue'
+import AvatarCropper from '../components/AvatarCropper.vue'
+import FlatPickr from 'vue-flatpickr-component'
+import 'flatpickr/dist/flatpickr.css'
 import { API_BASE_URL, toast } from '../main'
 import { getToken, authState } from '../utils/auth'
 import LoginOverlay from '../components/LoginOverlay.vue'
+import BaseInput from '../components/BaseInput.vue'

 export default {
  name: 'NewPostPageView',
-  components: { PostEditor, CategorySelect, TagSelect, LoginOverlay },
+  components: { PostEditor, CategorySelect, TagSelect, LoginOverlay, PostTypeSelect, AvatarCropper, FlatPickr },
  setup() {
    const title = ref('')
    const content = ref('')
    const selectedCategory = ref('')
    const selectedTags = ref([])
+    const postType = ref('NORMAL')
+    const prizeIcon = ref('')
+    const prizeIconFile = ref(null)
+    const tempPrizeIcon = ref('')
+    const showPrizeCropper = ref(false)
+    const prizeName = ref('')
+    const prizeCount = ref(1)
+    const prizeDescription = ref('')
+    const endTime = ref(null)
+    const startTime = ref(null)
+    const dateConfig = { enableTime: true, time_24hr: true, dateFormat: 'Y-m-d H:i' }
    const isWaitingPosting = ref(false)
    const isAiLoading = ref(false)
    const isLogin = computed(() => authState.loggedIn)

+    const onPrizeIconChange = e => {
+      const file = e.target.files[0]
+      if (file) {
+        const reader = new FileReader()
+        reader.onload = () => {
+          tempPrizeIcon.value = reader.result
+          showPrizeCropper.value = true
+        }
+        reader.readAsDataURL(file)
+      }
+    }
+
+    const onPrizeCropped = ({ file, url }) => {
+      prizeIconFile.value = file
+      prizeIcon.value = url
+    }
+
+    watch(prizeCount, val => {
+      if (!val || val < 1) prizeCount.value = 1
+    })
+
    const loadDraft = async () => {
      const token = getToken()
      if (!token) return
@@ -85,6 +155,15 @@ export default {
      content.value = ''
      selectedCategory.value = ''
      selectedTags.value = []
+      postType.value = 'NORMAL'
+      prizeIcon.value = ''
+      prizeIconFile.value = null
+      tempPrizeIcon.value = ''
+      showPrizeCropper.value = false
+      prizeDescription.value = ''
+      prizeCount.value = 1
+      endTime.value = null
+      startTime.value = null

      // 删除草稿
      const token = getToken()
@@ -213,10 +292,44 @@ export default {
        toast.error('请选择标签')
        return
      }
+      if (postType.value === 'LOTTERY') {
+        if (!prizeIcon.value) {
+          toast.error('请上传奖品图片')
+          return
+        }
+        if (!prizeCount.value || prizeCount.value < 1) {
+          toast.error('奖品数量必须大于0')
+          return
+        }
+        if (!prizeDescription.value) {
+          toast.error('请输入奖品描述')
+          return
+        }
+        if (!endTime.value) {
+          toast.error('请选择抽奖结束时间')
+          return
+        }
+      }
      try {
        const token = getToken()
        await ensureTags(token)
        isWaitingPosting.value = true
+        let prizeIconUrl = prizeIcon.value
+        if (postType.value === 'LOTTERY' && prizeIconFile.value) {
+          const form = new FormData()
+          form.append('file', prizeIconFile.value)
+          const uploadRes = await fetch(`${API_BASE_URL}/api/upload`, {
+            method: 'POST',
+            headers: { Authorization: `Bearer ${token}` },
+            body: form
+          })
+          const uploadData = await uploadRes.json()
+          if (!uploadRes.ok || uploadData.code !== 0) {
+            toast.error('奖品图片上传失败')
+            return
+          }
+          prizeIconUrl = uploadData.data.url
+        }
        const res = await fetch(`${API_BASE_URL}/api/posts`, {
          method: 'POST',
          headers: {
@@ -227,7 +340,15 @@ export default {
            title: title.value,
            content: content.value,
            categoryId: selectedCategory.value,
-            tagIds: selectedTags.value
+            tagIds: selectedTags.value,
+            type: postType.value,
+            prizeIcon: postType.value === 'LOTTERY' ? prizeIconUrl : undefined,
+            prizeName: postType.value === 'LOTTERY' ? prizeName.value : undefined,
+            prizeCount: postType.value === 'LOTTERY' ? prizeCount.value : undefined,
+            prizeDescription: postType.value === 'LOTTERY' ? prizeDescription.value : undefined,
+            startTime: postType.value === 'LOTTERY' ? new Date(startTime.value).toISOString() : undefined,
+            // 将时间转换为 UTC+8.5 时区 todo: 需要优化
+            endTime: postType.value === 'LOTTERY' ? new Date(new Date(endTime.value).getTime() + 8.02 * 60 * 60 * 1000).toISOString() : undefined
          })
        })
        const data = await res.json()
@@ -251,7 +372,7 @@ export default {
        isWaitingPosting.value = false
      }
    }
-    return { title, content, selectedCategory, selectedTags, submitPost, saveDraft, clearPost, isWaitingPosting, aiGenerate, isAiLoading, isLogin }
+    return { title, content, selectedCategory, selectedTags, postType, prizeIcon, prizeCount, endTime, submitPost, saveDraft, clearPost, isWaitingPosting, aiGenerate, isAiLoading, isLogin, onPrizeIconChange, onPrizeCropped, showPrizeCropper, tempPrizeIcon, dateConfig, prizeName, prizeDescription }
  }
 }
 </script>
@@ -366,6 +487,98 @@ export default {
  padding-bottom: 50px;
 }

+.lottery-section {
+  margin-top: 20px;
+  display: flex;
+  flex-direction: column;
+  gap: 20px;
+}
+
+.prize-row {
+  display: flex;
+}
+
+.prize-container {
+  position: relative;
+  width: 100px;
+  height: 100px;
+  border-radius: 10px;
+  overflow: hidden;
+  cursor: pointer;
+}
+
+.default-prize-icon {
+  font-size: 100px;
+  opacity: 0.5;
+  color: var(--text-color);
+}
+
+.prize-preview {
+  width: 100%;
+  height: 100%;
+  object-fit: cover;
+}
+
+.prize-input {
+  display: none;
+}
+
+.prize-overlay {
+  position: absolute;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  background-color: rgba(0, 0, 0, 0.4);
+  color: #fff;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  opacity: 0;
+  transition: opacity 0.2s;
+}
+
+.prize-container:hover .prize-overlay {
+  opacity: 1;
+}
+
+.prize-count-row,
+.prize-time-row {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+}
+
+.prize-count-input {
+  display: flex;
+  align-items: center;
+}
+
+.prize-name-input {
+  height: 30px;
+  border-radius: 5px;
+  border: 1px solid var(--border-color);
+  padding: 0 10px;
+  margin-left: 10px;
+  font-size: 16px;
+  color: var(--text-color);
+}
+
+.prize-count-input-field {
+  width: 50px;
+  height: 30px;
+  border-radius: 5px;
+  border: 1px solid var(--border-color);
+  padding: 0 10px;
+  font-size: 16px;
+  color: var(--text-color);
+}
+
+.time-picker {
+  max-width: 200px;
+  height: 30px;
+}
+
@media (max-width: 768px) {
  .new-post-page {
    width: calc(100vw - 20px);
--- a/frontend_nuxt/pages/posts/[id]/index.vue
+++ b/frontend_nuxt/pages/posts/[id]/index.vue
@@ -77,6 +77,39 @@
        </div>
      </div>

+      <div v-if="lottery" class="prize-container">
+        <div class="prize-content">
+          <div class="prize-info">
+            <div class="prize-info-left">
+              <div class="prize-icon">
+                <img class="prize-icon-img" v-if="lottery.prizeIcon" :src="lottery.prizeIcon" alt="prize" />
+                <i v-else class="fa-solid fa-gift default-prize-icon"></i>
+              </div>
+              <div class="prize-name">{{ lottery.prizeDescription }}</div>
+              <div class="prize-count">x {{ lottery.prizeCount }}</div>
+            </div>
+            <div class="prize-end-time prize-info-right">
+              <div class="prize-end-time-title">离结束还有</div>
+              <div class="prize-end-time-value">{{ countdown }}</div>
+              <div v-if="loggedIn && !hasJoined && !lotteryEnded" class="join-prize-button" @click="joinLottery">
+                <div class="join-prize-button-text">参与抽奖</div>
+              </div>
+              <div v-else-if="hasJoined" class="join-prize-button disabled">
+                <div class="join-prize-button-text">已参与</div>
+              </div>
+            </div>
+          </div>
+        </div>
+        <div class="prize-member-container">
+          <img v-for="p in lotteryParticipants" :key="p.id" class="prize-member-avatar" :src="p.avatar" alt="avatar" @click="gotoUser(p.id)" />
+          <div v-if="lotteryEnded && lotteryWinners.length" class="prize-member-winner">
+            <i class="fas fa-medal medal-icon"></i>
+            <span class="prize-member-winner-name">获奖者: </span>
+            <img v-for="w in lotteryWinners" :key="w.id" class="prize-member-avatar" :src="w.avatar" alt="avatar" @click="gotoUser(w.id)" />
+          </div>
+        </div>
+      </div>
+
      <CommentEditor @submit="postComment" :loading="isWaitingPostingComment" :disabled="!loggedIn"
        :show-login-overlay="!loggedIn" :parent-user-name="author.username" />

@@ -193,6 +226,7 @@ export default {
        document.title = defaultTitle
        if (metaDescriptionEl) metaDescriptionEl.setAttribute('content', defaultDescription)
        window.removeEventListener('scroll', updateCurrentIndex)
+        if (countdownTimer) clearInterval(countdownTimer)
      })
    }

@@ -202,6 +236,45 @@ export default {
    const loggedIn = computed(() => authState.loggedIn)
    const isAdmin = computed(() => authState.role === 'ADMIN')
    const isAuthor = computed(() => authState.username === author.value.username)
+    const lottery = ref(null)
+    const countdown = ref('00:00:00')
+    let countdownTimer = null
+    const lotteryParticipants = computed(() => lottery.value?.participants || [])
+    const lotteryWinners = computed(() => lottery.value?.winners || [])
+    const lotteryEnded = computed(() => {
+      if (!lottery.value || !lottery.value.endTime) return false
+      return new Date(lottery.value.endTime).getTime() <= Date.now()
+    })
+    const hasJoined = computed(() => {
+      if (!loggedIn.value) return false
+      return lotteryParticipants.value.some(p => p.id === Number(authState.userId))
+    })
+    const updateCountdown = () => {
+      if (!lottery.value || !lottery.value.endTime) {
+        countdown.value = '00:00:00'
+        return
+      }
+      const diff = new Date(lottery.value.endTime).getTime() - Date.now()
+      if (diff <= 0) {
+        countdown.value = '00:00:00'
+        if (countdownTimer) {
+          clearInterval(countdownTimer)
+          countdownTimer = null
+        }
+        return
+      }
+      const h = String(Math.floor(diff / 3600000)).padStart(2, '0')
+      const m = String(Math.floor((diff % 3600000) / 60000)).padStart(2, '0')
+      const s = String(Math.floor((diff % 60000) / 1000)).padStart(2, '0')
+      countdown.value = `${h}:${m}:${s}`
+    }
+    const startCountdown = () => {
+      if (!process.client) return
+      if (countdownTimer) clearInterval(countdownTimer)
+      updateCountdown()
+      countdownTimer = setInterval(updateCountdown, 1000)
+    }
+    const gotoUser = id => router.push(`/users/${id}`)
    const articleMenuItems = computed(() => {
      const items = []
      if (isAuthor.value || isAdmin.value) {
@@ -336,6 +409,8 @@ export default {
        status.value = data.status
        pinnedAt.value = data.pinnedAt
        postTime.value = TimeManager.format(data.createdAt)
+        lottery.value = data.lottery || null
+        if (lottery.value && lottery.value.endTime) startCountdown()
        await nextTick()
      } catch (e) {
        console.error(e)
@@ -552,6 +627,24 @@ export default {
      }
    }

+    const joinLottery = async () => {
+      const token = getToken()
+      if (!token) {
+        toast.error('请先登录')
+        return
+      }
+      const res = await fetch(`${API_BASE_URL}/api/posts/${postId}/lottery/join`, {
+        method: 'POST',
+        headers: { Authorization: `Bearer ${token}` }
+      })
+      if (res.ok) {
+        toast.success('已参与抽奖')
+        await fetchPost()
+      } else {
+        toast.error('操作失败')
+      }
+    }
+
    const fetchCommentSorts = () => {
      return Promise.resolve([
        { id: 'NEWEST', name: '最新', icon: 'fas fa-clock' },
@@ -639,10 +732,12 @@ export default {
      copyPostLink,
      subscribePost,
      unsubscribePost,
+      joinLottery,
      renderMarkdown,
      isWaitingFetchingPost,
      isWaitingPostingComment,
      gotoProfile,
+      gotoUser,
      subscribed,
      loggedIn,
      isAuthor,
@@ -663,9 +758,14 @@ export default {
      pinnedAt,
      commentSort,
      fetchCommentSorts,
-      isFetchingComments
-      ,
-      getMedalTitle
+      isFetchingComments,
+      getMedalTitle,
+      lottery,
+      countdown,
+      lotteryParticipants,
+      lotteryWinners,
+      lotteryEnded,
+      hasJoined
    }
  }
 }
@@ -1011,6 +1111,127 @@ export default {
  position: relative;
 }

+.prize-container {
+  margin-top: 20px;
+  display: flex;
+  flex-direction: column;
+  gap: 10px;
+  background-color: var(--normal-background-color);
+  padding: 10px;
+}
+
+.prize-info {
+  display: flex;
+  flex-direction: row;
+  justify-content: space-between;
+  width: 100%;
+}
+
+.prize-icon {
+  width: 24px;
+  height: 24px;
+}
+
+.default-prize-icon {
+  font-size: 24px;
+  opacity: 0.5;
+}
+
+.prize-icon-img {
+  width: 100%;
+  height: 100%;
+}
+
+.prize-name {
+  font-size: 13px;
+  opacity: 0.7;
+  margin-left: 10px;
+}
+
+.prize-count {
+  font-size: 13px;
+  font-weight: bold;
+  opacity: 0.7;
+  margin-left: 10px;
+  color: var(--primary-color);
+}
+
+.prize-end-time {
+  display: flex;
+  flex-direction: row;
+  align-items: center;
+  font-size: 13px;
+  opacity: 0.7;
+  margin-left: 10px;
+}
+
+.prize-end-time-title {
+  font-size: 13px;
+  opacity: 0.7;
+  margin-right: 5px;
+}
+
+.prize-end-time-value {
+  font-size: 13px;
+  font-weight: bold;
+  color: var(--primary-color);
+}
+
+.prize-info-left,
+.prize-info-right {
+  display: flex;
+  flex-direction: row;
+  align-items: center;
+}
+
+.join-prize-button {
+  margin-left: 10px;
+  background-color: var(--primary-color);
+  color: white;
+  padding: 5px 10px;
+  border-radius: 8px;
+  cursor: pointer;
+}
+
+.join-prize-button:hover {
+  background-color: var(--primary-color-hover);
+}
+
+.join-prize-button.disabled {
+  background-color: var(--background-color-disabled);
+  cursor: not-allowed;
+}
+
+.join-prize-button.disabled:hover {
+  background-color: var(--background-color-disabled);
+  cursor: not-allowed;
+} 
+
+.prize-member-avatar {
+  width: 30px;
+  height: 30px;
+  margin-left: 3px;
+  border-radius: 50%;
+}
+
+.prize-member-winner {
+  display: flex;
+  flex-direction: row;
+  align-items: center;
+  gap: 5px;
+  margin-top: 10px;
+}
+
+.medal-icon {
+  font-size: 16px;
+  color: var(--primary-color);
+}
+
+.prize-member-winner-name {
+  font-size: 13px;
+  opacity: 0.7;
+}
+
@media (max-width: 768px) {
  .post-page-main-container {
    width: calc(100% - 20px);