From 447c353a5d627b07a9d62b793a5a2ca10dac74e0 Mon Sep 17 00:00:00 2001
From: tangly1024 <tlyong1992@hotmail.com>
Date: Mon, 21 Mar 2022 17:32:01 +0800
Subject: [PATCH] =?UTF-8?q?=E6=96=B0=E5=A2=9E=E6=8E=A8=E8=8D=90=E6=96=87?=
 =?UTF-8?q?=E7=AB=A0=E6=95=B0=E9=87=8F=E9=85=8D=E7=BD=AE?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 blog.config.js          |  1 +
 pages/article/[slug].js | 39 +++++++++++++++++++++++----------------
 2 files changed, 24 insertions(+), 16 deletions(-)

diff --git a/blog.config.js b/blog.config.js
index 0b62db37..312d4603 100644
--- a/blog.config.js
+++ b/blog.config.js
@@ -26,6 +26,7 @@ const BLOG = {
   POST_LIST_STYLE: 'page', // ['page','scroll] 文章列表样式:页码分页、单页滚动加载
   POST_LIST_PREVIEW: process.env.NEXT_PUBLIC_POST_PREVIEW || 'false', //  是否在列表加载文章预览
   POST_PREVIEW_LINES: 12, // 预览博客行数
+  POST_RECOMMEND_COUNT: 6, // 推荐文章数量
   POSTS_PER_PAGE: 6, // post counts per page
   POSTS_SORT_BY: 'notion', // 排序方式 'date'按时间,'notion'由notion控制
 
diff --git a/pages/article/[slug].js b/pages/article/[slug].js
index 9eb1bd65..e3f71f51 100644
--- a/pages/article/[slug].js
+++ b/pages/article/[slug].js
@@ -51,7 +51,7 @@ export async function getStaticProps ({ params: { slug } }) {
   const prev = allPosts.slice(index - 1, index)[0] ?? allPosts.slice(-1)[0]
   const next = allPosts.slice(index + 1, index + 2)[0] ?? allPosts[0]
 
-  const recommendPosts = getRecommendPost(post, allPosts)
+  const recommendPosts = getRecommendPost(post, allPosts, BLOG.POST_RECOMMEND_COUNT)
 
   return {
     props: {
@@ -76,25 +76,32 @@ export async function getStaticProps ({ params: { slug } }) {
  * @param {*} count
  * @returns
  */
-function getRecommendPost (post, allPosts, count = 5) {
-  let filteredPosts = []
-  for (const i in allPosts) {
+function getRecommendPost (post, allPosts, count = 6) {
+  let recommendPosts = []
+  const postIds = []
+  const currentTags = post.tags
+  for (let i = 0; i < allPosts.length; i++) {
     const p = allPosts[i]
-    filteredPosts.push(Object.assign(p))
+    if (p.id === post.id || p.type.indexOf('Post') < 0) {
+      continue
+    }
+
+    for (let j = 0; j < currentTags.length; j++) {
+      const t = currentTags[j]
+      if (postIds.indexOf(p.id) > -1) {
+        continue
+      }
+      if (p.tags && p.tags.indexOf(t) > -1) {
+        recommendPosts.push(p)
+        postIds.push(p.id)
+      }
+    }
   }
 
-  if (post.tags && post.tags.length) {
-    const currentTag = post.tags[0]
-    filteredPosts = filteredPosts.filter(
-      p => p && p.slug !== post.slug && p.tags && p.tags?.includes(currentTag) && p.type === ['Post']
-    )
+  if (recommendPosts.length > count) {
+    recommendPosts = recommendPosts.slice(0, count)
   }
-
-  // 筛选前5个
-  if (filteredPosts.length > count) {
-    filteredPosts = filteredPosts.slice(0, count)
-  }
-  return filteredPosts
+  return recommendPosts
 }
 
 export default Slug