自动为没有Front-matter的md按语雀知识库目录增加categories about yuque-hexo HOT 2 CLOSED

        if (config.autoFrontMatter) { // 自己在package.js添加配置项
          let categories = new Array();
          const getCategories = function (toc, item) { // 根据toc生成categories
            for (let i = 0; i < toc.length; i++) {
              if (toc[i].uuid === item.parent_uuid) {
                categories.push(toc[i].title);
                if (!!toc[i].parent_uuid) {
                  getCategories(toc, toc[i]);
                } else {
                  break;
                }
              }
            }
          }
          for (let i = 0; i < toc.length; i++) { // 取得文章对应知识库的目标项
            if (toc[i].type === 'DOC' && toc[i].id == article.id) {
              getCategories(toc, toc[i]);
            }
          }
          const str_categories = categories.length < 1 ? '' : `categories:\n- ${categories.length > 1 ? '[' + categories.join(',') + ']' : categories[0]}\n`;
          const front_matter = `---\ntitle: ${article.title}\ndate: ${article.created_at}\nupdated: ${article
            .updated_at}\n${str_categories}---\n`;
          article.body = front_matter + article.body;
        }