package com.mszlu.blog.controller;
 
import com.mszlu.blog.common.aop.LogAnnotation;
import com.mszlu.blog.common.cache.Cache;
import com.mszlu.blog.service.ArticleService;
import com.mszlu.blog.vo.Result;
import com.mszlu.blog.vo.params.ArticleParam;
import com.mszlu.blog.vo.params.PageParams;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
 
//json數(shù)據(jù)進(jìn)行交互
@RestController
@RequestMapping("articles")
public class ArticleController {
 
    @Autowired
    private ArticleService articleService;
    /**
     * 首頁(yè) 文章列表
     * @param pageParams
     * @return
     */
    @PostMapping
    //加上此注解 代表要對(duì)此接口記錄日志
    @LogAnnotation(module="文章",operator="獲取文章列表")
    @Cache(expire = 5 * 60 * 1000,name = "listArticle")
    public Result listArticle(@RequestBody PageParams pageParams){
//        int i = 10/0;
        return articleService.listArticle(pageParams);
    }
 
    /**
     * 首頁(yè) 最熱文章
     * @return
     */
    @PostMapping("hot")
    @Cache(expire = 5 * 60 * 1000,name = "hot_article")
    public Result hotArticle(){
        int limit = 5;
        return articleService.hotArticle(limit);
    }
 
    /**
     * 首頁(yè) 最新文章
     * @return
     */
    @PostMapping("new")
    @Cache(expire = 5 * 60 * 1000,name = "news_article")
    public Result newArticles(){
        int limit = 5;
        return articleService.newArticles(limit);
    }
 
    /**
     * 首頁(yè) 最新文章
     * @return
     */
    @PostMapping("listArchives")
    public Result listArchives(){
        return articleService.listArchives();
    }
 
 
    @PostMapping("view/{id}")
    public Result findArticleById(@PathVariable("id") Long articleId){
        return articleService.findArticleById(articleId);
    }
    //接口url：/articles/publish
    //
    //請(qǐng)求方式：POST
    @PostMapping("publish")
    public Result publish(@RequestBody ArticleParam articleParam){
 
        return articleService.publish(articleParam);
    }
}

package com.mszlu.blog.service.impl;
 
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.mszlu.blog.dao.dos.Archives;
import com.mszlu.blog.dao.mapper.ArticleBodyMapper;
import com.mszlu.blog.dao.mapper.ArticleMapper;
import com.mszlu.blog.dao.mapper.ArticleTagMapper;
import com.mszlu.blog.dao.pojo.Article;
import com.mszlu.blog.dao.pojo.ArticleBody;
import com.mszlu.blog.dao.pojo.ArticleTag;
import com.mszlu.blog.dao.pojo.SysUser;
import com.mszlu.blog.service.*;
import com.mszlu.blog.utils.UserThreadLocal;
import com.mszlu.blog.vo.ArticleBodyVo;
import com.mszlu.blog.vo.ArticleVo;
import com.mszlu.blog.vo.Result;
import com.mszlu.blog.vo.TagVo;
import com.mszlu.blog.vo.params.ArticleParam;
import com.mszlu.blog.vo.params.PageParams;
import org.apache.commons.lang3.StringUtils;
import org.joda.time.DateTime;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
 
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
 
@Service
public class ArticleServiceImpl implements ArticleService {
 
    @Autowired
    private ArticleMapper articleMapper;
    @Autowired
    private TagService tagService;
    @Autowired
    private SysUserService sysUserService;
    @Autowired
    private ArticleTagMapper articleTagMapper;
    @Override
    public Result listArticle(PageParams pageParams) {
        Page<Article> page = new Page<>(pageParams.getPage(),pageParams.getPageSize());
 
        IPage<Article> articleIPage = articleMapper.listArticle(
                page,
                pageParams.getCategoryId(),
                pageParams.getTagId(),
                pageParams.getYear(),
                pageParams.getMonth());
        List<Article> records = articleIPage.getRecords();
        return Result.success(copyList(records,true,true));
    }
 
//    @Override
//    public Result listArticle(PageParams pageParams) {
//        /**
//         * 1. 分頁(yè)查詢 article數(shù)據(jù)庫(kù)表
//         */
//        Page<Article> page = new Page<>(pageParams.getPage(),pageParams.getPageSize());
//        LambdaQueryWrapper<Article> queryWrapper = new LambdaQueryWrapper<>();
//        if (pageParams.getCategoryId() != null){
//            // and category_id=#{categoryId}
//            queryWrapper.eq(Article::getCategoryId,pageParams.getCategoryId());
//        }
//        List<Long> articleIdList = new ArrayList<>();
//        if (pageParams.getTagId() != null){
//            //加入標(biāo)簽 條件查詢
//            //article表中 并沒(méi)有tag字段 一篇文章 有多個(gè)標(biāo)簽
//            //article_tag  article_id 1 : n tag_id
//            LambdaQueryWrapper<ArticleTag> articleTagLambdaQueryWrapper = new LambdaQueryWrapper<>();
//            articleTagLambdaQueryWrapper.eq(ArticleTag::getTagId,pageParams.getTagId());
//            List<ArticleTag> articleTags = articleTagMapper.selectList(articleTagLambdaQueryWrapper);
//            for (ArticleTag articleTag : articleTags) {
//                articleIdList.add(articleTag.getArticleId());
//            }
//            if (articleIdList.size() > 0){
//                // and id in(1,2,3)
//                queryWrapper.in(Article::getId,articleIdList);
//            }
//        }
//        //是否置頂進(jìn)行排序
//        //order by create_date desc
//        queryWrapper.orderByDesc(Article::getWeight,Article::getCreateDate);
//        Page<Article> articlePage = articleMapper.selectPage(page, queryWrapper);
//        List<Article> records = articlePage.getRecords();
//        //能直接返回嗎？ 很明顯不能
//        List<ArticleVo> articleVoList = copyList(records,true,true);
//        return Result.success(articleVoList);
//    }
 
    @Override
    public Result hotArticle(int limit) {
        LambdaQueryWrapper<Article> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.orderByDesc(Article::getViewCounts);
        queryWrapper.select(Article::getId,Article::getTitle);
        queryWrapper.last("limit "+limit);
        //select id,title from article order by view_counts desc limit 5
        List<Article> articles = articleMapper.selectList(queryWrapper);
 
        return Result.success(copyList(articles,false,false));
    }
 
    @Override
    public Result newArticles(int limit) {
        LambdaQueryWrapper<Article> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.orderByDesc(Article::getCreateDate);
        queryWrapper.select(Article::getId,Article::getTitle);
        queryWrapper.last("limit "+limit);
        //select id,title from article order by create_date desc desc limit 5
        List<Article> articles = articleMapper.selectList(queryWrapper);
 
        return Result.success(copyList(articles,false,false));
    }
 
    @Override
    public Result listArchives() {
        List<Archives> archivesList = articleMapper.listArchives();
        return Result.success(archivesList);
    }
 
    @Autowired
    private ThreadService threadService;
 
    @Override
    public Result findArticleById(Long articleId) {
        /**
         * 1. 根據(jù)id查詢 文章信息
         * 2. 根據(jù)bodyId和categoryid 去做關(guān)聯(lián)查詢
         */
        Article article = this.articleMapper.selectById(articleId);
        ArticleVo articleVo = copy(article, true, true,true,true);
        //查看完文章了，新增閱讀數(shù)，有沒(méi)有問(wèn)題呢？
        //查看完文章之后，本應(yīng)該直接返回?cái)?shù)據(jù)了，這時(shí)候做了一個(gè)更新操作，更新時(shí)加寫鎖，阻塞其他的讀操作，性能就會(huì)比較低
        // 更新 增加了此次接口的 耗時(shí) 如果一旦更新出問(wèn)題，不能影響 查看文章的操作
        //線程池  可以把更新操作 扔到線程池中去執(zhí)行，和主線程就不相關(guān)了
        threadService.updateArticleViewCount(articleMapper,article);
        return Result.success(articleVo);
    }
 
    @Override
    public Result publish(ArticleParam articleParam) {
        //此接口 要加入到登錄攔截當(dāng)中
        SysUser sysUser = UserThreadLocal.get();
        /**
         * 1. 發(fā)布文章 目的 構(gòu)建Article對(duì)象
         * 2. 作者id  當(dāng)前的登錄用戶
         * 3. 標(biāo)簽  要將標(biāo)簽加入到 關(guān)聯(lián)列表當(dāng)中
         * 4. body 內(nèi)容存儲(chǔ) article bodyId
         */
        Article article = new Article();
        article.setAuthorId(sysUser.getId());
        article.setWeight(Article.Article_Common);
        article.setViewCounts(0);
        article.setTitle(articleParam.getTitle());
        article.setSummary(articleParam.getSummary());
        article.setCommentCounts(0);
        article.setCreateDate(System.currentTimeMillis());
        article.setCategoryId(Long.parseLong(articleParam.getCategory().getId()));
        //插入之后 會(huì)生成一個(gè)文章id
        this.articleMapper.insert(article);
        //tag
        List<TagVo> tags = articleParam.getTags();
        if (tags != null){
            for (TagVo tag : tags) {
                Long articleId = article.getId();
                ArticleTag articleTag = new ArticleTag();
                articleTag.setTagId(Long.parseLong(tag.getId()));
                articleTag.setArticleId(articleId);
                articleTagMapper.insert(articleTag);
            }
        }
        //body
        ArticleBody articleBody  = new ArticleBody();
        articleBody.setArticleId(article.getId());
        articleBody.setContent(articleParam.getBody().getContent());
        articleBody.setContentHtml(articleParam.getBody().getContentHtml());
        articleBodyMapper.insert(articleBody);
 
        article.setBodyId(articleBody.getId());
        articleMapper.updateById(article);
        Map<String,String> map = new HashMap<>();
        map.put("id",article.getId().toString());
        return Result.success(map);
    }
 
 
    private List<ArticleVo> copyList(List<Article> records, boolean isTag, boolean isAuthor) {
        List<ArticleVo> articleVoList = new ArrayList<>();
        for (Article record : records) {
            articleVoList.add(copy(record,isTag,isAuthor,false,false));
        }
        return articleVoList;
    }
    private List<ArticleVo> copyList(List<Article> records, boolean isTag, boolean isAuthor, boolean isBody,boolean isCategory) {
        List<ArticleVo> articleVoList = new ArrayList<>();
        for (Article record : records) {
            articleVoList.add(copy(record,isTag,isAuthor,isBody,isCategory));
        }
        return articleVoList;
    }
 
    @Autowired
    private CategoryService categoryService;
 
 
    private ArticleVo copy(Article article, boolean isTag, boolean isAuthor, boolean isBody,boolean isCategory){
        ArticleVo articleVo = new ArticleVo();
        articleVo.setId(String.valueOf(article.getId()));
        BeanUtils.copyProperties(article,articleVo);
 
        articleVo.setCreateDate(new DateTime(article.getCreateDate()).toString("yyyy-MM-dd HH:mm"));
        //并不是所有的接口 都需要標(biāo)簽 ，作者信息
        if (isTag){
            Long articleId = article.getId();
            articleVo.setTags(tagService.findTagsByArticleId(articleId));
        }
        if (isAuthor){
            Long authorId = article.getAuthorId();
            articleVo.setAuthor(sysUserService.findUserById(authorId).getNickname());
        }
        if (isBody){
            Long bodyId = article.getBodyId();
            articleVo.setBody(findArticleBodyById(bodyId));
        }
        if (isCategory){
            Long categoryId = article.getCategoryId();
            articleVo.setCategory(categoryService.findCategoryById(categoryId));
        }
        return articleVo;
    }
 
    @Autowired
    private ArticleBodyMapper articleBodyMapper;
 
    private ArticleBodyVo findArticleBodyById(Long bodyId) {
        ArticleBody articleBody = articleBodyMapper.selectById(bodyId);
        ArticleBodyVo articleBodyVo = new ArticleBodyVo();
        articleBodyVo.setContent(articleBody.getContent());
        return articleBodyVo;
    }
 
}