发布动态话题自动创建和引用

src/main/java/cn/meteor/beyondclouds/modules/post/api/PostApi.java

@@ -79,7 +79,7 @@ public class PostApi {
 
         //发布动态
         try {
-            postService.publishPost(post,postForm.getTopicIds());
+            postService.publishPost(post);
             return Response.success();
         } catch (ProjectServiceException e) {
             e.printStackTrace();

src/main/java/cn/meteor/beyondclouds/modules/post/form/PostForm.java

@@ -26,7 +26,4 @@ public class PostForm {
 
     @NullOrNotBlank(message = "请传入有效的视频内容")
     private String video;
-
-    @ElementNotBlank(message = "话题Id不可为空")
-    private List<String> topicIds;
 }

src/main/java/cn/meteor/beyondclouds/modules/post/service/IPostService.java

@@ -21,10 +21,9 @@ public interface IPostService extends IService<Post> {
     /**
      * 发布动态
      * @param post
-     * @param topicIds
      * @throws ProjectServiceException
      */
-    void publishPost(Post post , List<String> topicIds) throws ProjectServiceException;
+    void publishPost(Post post) throws ProjectServiceException;
 
     /**
      * 删除动态

src/main/java/cn/meteor/beyondclouds/modules/post/service/impl/PostServiceImpl.java

@@ -16,6 +16,7 @@ import cn.meteor.beyondclouds.modules.topic.service.ITopicReferenceService;
 import cn.meteor.beyondclouds.modules.topic.service.ITopicService;
 import cn.meteor.beyondclouds.modules.user.entity.User;
 import cn.meteor.beyondclouds.modules.user.service.IUserService;
+import cn.meteor.beyondclouds.util.TopicUtils;
 import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
 import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
 import com.baomidou.mybatisplus.core.metadata.IPage;
@@ -24,6 +25,7 @@ import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.util.CollectionUtils;
+import org.springframework.util.StringUtils;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -74,7 +76,7 @@ public class PostServiceImpl extends ServiceImpl<PostMapper, Post> implements IP
      * @throws ProjectServiceException
      */
     @Override
-    public void publishPost(Post post , List<String> topicIds) throws ProjectServiceException {
+    public void publishPost(Post post) throws ProjectServiceException {
         //1.判断是否视频和图片都传了
         if (null != post.getPictures() && null != post.getVideo()) {
             throw new ProjectServiceException(PostErrorCode.NOT_APPEAR_SAME_TIME);
@@ -104,12 +106,17 @@ public class PostServiceImpl extends ServiceImpl<PostMapper, Post> implements IP
         save(post);
 
         //处理话题引用
-        if (!CollectionUtils.isEmpty(topicIds)) {
-            // 获取要引用的话题，不正确的话题ID会被自动过滤
-            List<String> existsTopicIds = topicService.listByIds(topicIds).stream().map(Topic::getTopicId).collect(Collectors.toList());
-            if (!CollectionUtils.isEmpty(existsTopicIds)) {
+        String postContent = post.getContent();
+        if (!StringUtils.isEmpty(postContent)) {
+            // 解析话题，若话题不存在则创建话题
+            List<String> topicNames = TopicUtils.parseTopics(post.getContent());
+            if (!CollectionUtils.isEmpty(topicNames)) {
+                List<Topic> topics = topicService.queryAndCreateByTopicNames(topicNames, post.getUserId());
+                List<String >topicIds = topics.stream().map(Topic::getTopicId).collect(Collectors.toList());
+
+                // 关联话题和动态
                 List<TopicReference> topicReferences = new ArrayList<>();
-                for (String topicId : existsTopicIds) {
+                for (String topicId : topicIds) {
                     TopicReference topicReference = new TopicReference();
                     topicReference.setTopicId(topicId);
                     topicReference.setReferencerId(post.getPostId());
@@ -119,9 +126,11 @@ public class PostServiceImpl extends ServiceImpl<PostMapper, Post> implements IP
                 // 批量保存
                 topicReferenceService.saveBatch(topicReferences);
                 // 新增话题引用次数
-                topicService.increaseReferenceCountBatch(existsTopicIds, 1);
+                topicService.increaseReferenceCountBatch(topicIds, 1);
             }
+
         }
+
         //发送消息到消息队列
         messageQueueService.sendDataItemChangeMessage(DataItemChangeMessage.addMessage(DataItemType.POST, post.getPostId(), post.getUserId()));
 

src/main/java/cn/meteor/beyondclouds/modules/topic/service/ITopicService.java

@@ -9,6 +9,7 @@ import com.baomidou.mybatisplus.core.metadata.IPage;
 import com.baomidou.mybatisplus.extension.service.IService;
 
 import java.util.Collection;
+import java.util.List;
 
 /**
  * <p>
@@ -139,4 +140,12 @@ public interface ITopicService extends IService<Topic> {
      * @return IPage<Post>
      */
     IPage<Post> getPostByTopicName(Integer pageNumber, Integer pageSize, String topicName) throws TopicServiceException;
+
+    /**
+     * 查找并话题，若话题不存在，则创建话题
+     * @param topicNames
+     * @param userId
+     * @return
+     */
+    List<Topic> queryAndCreateByTopicNames(List<String> topicNames, String userId);
 }

src/main/java/cn/meteor/beyondclouds/modules/topic/service/impl/TopicServiceImpl.java

@@ -354,4 +354,31 @@ public class TopicServiceImpl extends ServiceImpl<TopicMapper, Topic> implements
         return postIPage;
     }
 
+    @Override
+    public List<Topic> queryAndCreateByTopicNames(List<String> topicNames, String userId) {
+        QueryWrapper<Topic> topicQueryWrapper = new QueryWrapper<>();
+        topicQueryWrapper.in("topic_name", topicNames);
+        List<Topic> topics = list(topicQueryWrapper);
+
+        // 查询不存在的话题
+        List<String> topicNameExists = topics.stream()
+                .map(Topic::getTopicName)
+                .collect(Collectors.toList());
+
+        List<String> topicNameNotExists = topicNames.stream()
+                .filter(topicName -> !topicNameExists.contains(topicName))
+                .collect(Collectors.toList());
+
+        // 创建不存在的话题并添加到topics
+        topicNameNotExists.forEach(topicName -> {
+            Topic topic = new Topic();
+            topic.setTopicName(topicName);
+            topic.setUserId(userId);
+            save(topic);
+            topics.add(topic);
+        });
+
+        return topics;
+    }
+
 }

src/main/java/cn/meteor/beyondclouds/util/TopicUtils.java

@@ -4,6 +4,7 @@ import lombok.extern.slf4j.Slf4j;
 import org.springframework.util.Assert;
 
 import java.util.ArrayList;
+import java.util.HashSet;
 import java.util.List;
 import java.util.TreeSet;
 import java.util.regex.Matcher;
@@ -27,13 +28,15 @@ public class TopicUtils {
         while (matcher.find()) {
             topicNames.add(matcher.group(2));
         }
-//        topicNames.stream().
-//                collect(Collectors.collectingAndThen(Collectors.toCollection());
-        return null;
+        topicNames = topicNames.stream().
+                collect(
+                        Collectors.collectingAndThen(Collectors.toCollection(() -> new HashSet<>()), ArrayList::new)
+                );
+        return topicNames;
     }
 
     public static void main(String[] args) {
-        System.out.println(TopicUtils.parseTopics("#哈哈哈#今天你吃饭了吗#吃了#######"));
+        System.out.println(TopicUtils.parseTopics("#哈哈哈#今#哈哈哈#天你吃饭了吗#吃了#######"));
     }
 
 }

src/main/resources/application.yml

@@ -4,7 +4,7 @@ spring:
     driver-class-name: com.mysql.cj.jdbc.Driver
     url: jdbc:mysql://127.0.0.1:3306/beyond_clouds?useUnicode=true&characterEncoding=UTF-8&useSSL=false&allowPublicKeyRetrieval=true
     username: root
-    password: 197442
+    password: 100Centa30821%mysql
 
   # 邮箱
   mail: