优雅写异步与循环

scripts/filter.js

@@ -1,47 +1,6 @@
-const crypto = require('crypto')
-/**
- * 创建mongodb数据库连接, 返回Model
- */
-function createModel(dbUrl) {
-  const Segment = require('segment')
-  const segment = new Segment() // 创建实例
-  segment.useDefault() // 使用默认的识别模块及字典
-
-  const mongoose = require('mongoose')
-  mongoose.connect(dbUrl, {useNewUrlParser: true})
-  const articleSchema = new mongoose.Schema({
-    title: String,
-    path: String,
-    create_date: Date,
-    content: String,
-    content_hash: String
-  }, {
-    collection: 'article',
-    versionKey: false,
-  })
-
-  const articleKeysSchema = new mongoose.Schema({
-    article_id: mongoose.Types.ObjectId,
-    keys: Array
-  }, {
-    collection: 'article_keys',
-    versionKey: false,
-  }) 
-  return {
-    articleModel: mongoose.model('Article', articleSchema),
-    articleKeysModel: mongoose.model('ArticleKeys', articleKeysSchema)
-  }
-}
-
-var mongooseModels = undefined
-if(hexo.config.save_content) {
-  mongooseModels = createModel('mongodb://127.0.0.1:27017/common_api')
-}
-
 // 替换markdown中图片路径的正则
 const mdImageRegex = /\]\s*\((?=(?!http).*?\))/gi
 // 替换所有HTML标签的正则
-const tagRegex = /<[^>]*>/g
 hexo.extend.filter.register('before_post_render', function(article){
   // article.raw 是原始的文件内容
   // article.content 是处理过代码块语法高亮的内容
@@ -49,32 +8,4 @@ hexo.extend.filter.register('before_post_render', function(article){
     article.content = article.content.replace(mdImageRegex, `](${hexo.config.picture_cdn}`)
   }
   return article
-})
-
-hexo.extend.filter.register('after_post_render', function(article){
-  if(!mongooseModels || article.pageid) return article
-  let textContent = article.content.replace(tagRegex, '')
-  const contentHash = crypto.createHash('sha1')
-        .update(textContent)
-        .digest('hex')
-  let articleKeys = segment.doSegment(textContent, {
-    simple: true, // 不返回词性
-    stripPunctuation: true // 去除标点符号
-  })
-  const articleEntity = new mongooseModels.articleModel({
-    title: article.title,
-    path: article.path,
-    create_date: article.date._i,
-    content: textContent,
-    content_hash: contentHash
-  })
-  articleEntity.save(function(err, savedArticle){
-    if(err) console.error(err)
-    const articleKeysEntity = new mongooseModels.articleKeysModel({
-      article_id: savedArticle._id,
-      keys: articleKeys,
-    })
-    articleKeysEntity.save()
-  })
-  return article;
 })