feat: 新建消息通知后端部分的

新建根据websocket的后端部分代码.其中包含sql数据库文件

src/main/java/com/youlai/system/service/impl/NoticeServiceImpl.java

@@ -0,0 +1,140 @@
+package com.youlai.system.service.impl;
+
+import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
+import com.google.gson.*;
+import com.youlai.system.security.util.SecurityUtils;
+import com.youlai.system.service.WebsocketService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import com.baomidou.mybatisplus.core.metadata.IPage;
+import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import com.youlai.system.mapper.NoticeMapper;
+import com.youlai.system.service.NoticeService;
+import com.youlai.system.model.entity.Notice;
+import com.youlai.system.model.form.NoticeForm;
+import com.youlai.system.model.query.NoticeQuery;
+import com.youlai.system.model.vo.NoticeVO;
+import com.youlai.system.converter.NoticeConverter;
+
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.Collectors;
+
+import cn.hutool.core.lang.Assert;
+import cn.hutool.core.util.StrUtil;
+
+/**
+ * 通知公告服务实现类
+ *
+ * @author youlaitech
+ * @since 2024-08-27 10:31
+ */
+@Service
+@RequiredArgsConstructor
+public class NoticeServiceImpl extends ServiceImpl<NoticeMapper, Notice> implements NoticeService {
+
+    private final NoticeConverter noticeConverter;
+
+    private final WebsocketService webSocketServer;
+    private final Gson gson = new GsonBuilder()
+            .registerTypeAdapter(LocalDateTime.class, (JsonSerializer<LocalDateTime>) (localDateTime, type, jsonSerializationContext) ->
+                    new JsonPrimitive(localDateTime.format(DateTimeFormatter.ISO_LOCAL_DATE_TIME)))
+            .registerTypeAdapter(LocalDateTime.class, (JsonDeserializer<LocalDateTime>) (jsonElement, type, jsonDeserializationContext) ->
+                    LocalDateTime.parse(jsonElement.getAsString(), DateTimeFormatter.ISO_LOCAL_DATE_TIME))
+            .create();
+
+    private void sendWebSocketMsg(Notice notice) {
+        if(notice.getSendStatus() > 0){
+            String jsonNotice = gson.toJson(noticeConverter.toVO(notice));
+             webSocketServer.sendStringToFrontend(jsonNotice);
+        }
+    }
+
+    /**
+    * 获取通知公告分页列表
+    *
+    * @param queryParams 查询参数
+    * @return {@link IPage<NoticeVO>} 通知公告分页列表
+    */
+    @Override
+    public IPage<NoticeVO> getNoticePage(NoticeQuery queryParams) {
+        Page<NoticeVO> pageVO = this.baseMapper.getNoticePage(
+                new Page<>(queryParams.getPageNum(), queryParams.getPageSize()),
+                queryParams
+        );
+        return pageVO;
+    }
+    
+    /**
+     * 获取通知公告表单数据
+     *
+     * @param id 通知公告ID
+     * @return
+     */
+    @Override
+    public NoticeForm getNoticeFormData(Long id) {
+        Notice entity = this.getById(id);
+        return noticeConverter.toForm(entity);
+    }
+    
+    /**
+     * 新增通知公告
+     *
+     * @param formData 通知公告表单对象
+     * @return
+     */
+    @Override
+    public boolean saveNotice(NoticeForm formData) {
+        Notice entity = noticeConverter.toEntity(formData);
+        entity.setCreateBy(SecurityUtils.getUserId());
+        entity.setReleaseBy(SecurityUtils.getUserId());
+        entity.setUpdateBy(SecurityUtils.getUserId());
+        entity.setIsDelete(0);
+        boolean result = this.save(entity);
+        if(result){
+            sendWebSocketMsg(entity);
+        }
+        return result;
+    }
+    
+    /**
+     * 更新通知公告
+     *
+     * @param id   通知公告ID
+     * @param formData 通知公告表单对象
+     * @return
+     */
+    @Override
+    public boolean updateNotice(Long id,NoticeForm formData) {
+        Notice entity = noticeConverter.toEntity(formData);
+        entity.setUpdateBy(SecurityUtils.getUserId());
+        entity.setIsDelete(0);
+        boolean result = this.updateById(entity);
+        if(result) {
+            sendWebSocketMsg(entity);
+        }
+        return result;
+    }
+    
+    /**
+     * 删除通知公告
+     *
+     * @param ids 通知公告ID，多个以英文逗号(,)分割
+     * @return
+     */
+    @Override
+    public boolean deleteNotices(String ids) {
+        Assert.isTrue(StrUtil.isNotBlank(ids), "删除的通知公告数据为空");
+        // 逻辑删除
+        List<Long> idList = Arrays.stream(ids.split(","))
+                .map(Long::parseLong)
+                .toList();
+        LambdaUpdateWrapper<Notice> wrapper = new LambdaUpdateWrapper<>();
+        wrapper.in(Notice::getId, idList).set(Notice::getIsDelete, 1);
+        return this.update(wrapper);
+    }
+
+}