From 09b59e7acb32f11de6dcd6ded0a24e52cca8dca3 Mon Sep 17 00:00:00 2001
From: Yufan Sheng <syhily@gmail.com>
Date: Wed, 16 Oct 2024 02:17:58 +0800
Subject: [PATCH] feat: dynamic feature posts.

---
 options.ts                                  |  3 +-
 src/components/page/post/FeaturePosts.astro | 57 ++++++++++++++-------
 2 files changed, 40 insertions(+), 20 deletions(-)

diff --git a/options.ts b/options.ts
index da1346c..d6ac9ad 100644
--- a/options.ts
+++ b/options.ts
@@ -46,7 +46,7 @@ const Options = z
         .readonly(),
       post: z.object({
         sort: z.enum(['asc', 'desc']),
-        feature: z.array(z.string()).optional(),
+        feature: z.array(z.string()).min(3).optional(),
         category: z.array(z.string()).optional(),
       }),
       pagination: z.object({
@@ -163,7 +163,6 @@ const options: z.input<typeof Options> = {
     assetPrefix: 'https://cat.yufan.me',
     post: {
       sort: 'desc',
-      feature: ['we-are-stranger', 'secret-of-boys-mind', 'my-darling'],
       category: ['article', 'think', 'gossip', 'coding'],
     },
     pagination: {
diff --git a/src/components/page/post/FeaturePosts.astro b/src/components/page/post/FeaturePosts.astro
index 9e6c4ea..c923e6c 100644
--- a/src/components/page/post/FeaturePosts.astro
+++ b/src/components/page/post/FeaturePosts.astro
@@ -8,29 +8,50 @@ interface Props {
 }
 
 const { posts } = Astro.props;
+const historicalPosts = (): Post[] => {
+  // Skip the first 6 pages.
+  const offset = options.settings.pagination.posts * 6;
+  if (posts.length - offset < 43 * 3 + 2) {
+    // Can't generate historical posts.
+    return [];
+  }
+
+  const now = new Date();
+  const radical = now.getMonth() + now.getDate();
+
+  return [posts[offset + radical - 1], posts[offset + radical + 43 - 1], posts[offset + radical + 43 * 2 - 1]];
+};
 const featurePosts = options.settings.post.feature ?? [];
-const metas: Post[] = featurePosts
-  .map((slug) => posts.find((post) => post.slug === slug))
-  .flatMap((post) => (post == null ? [] : [post]))
-  .slice(0, 3);
+
+const metas: Post[] =
+  featurePosts.length < 3
+    ? historicalPosts()
+    : featurePosts
+        .map((slug) => posts.find((post) => post.slug === slug))
+        .flatMap((post) => (post == null ? [] : [post]))
+        .slice(0, 3);
 ---
 
-<div class="list-top-pushes mb-3 mb-md-4 mb-lg-5">
-  <div class="container">
-    <div class="row gx-2 gx-md-3 list-grouped">
-      <div class="col-lg-8">
-        <FeaturePost post={metas[0]} />
-      </div>
-      <div class="col-lg-4 d-flex flex-column mt-2 mt-md-3 mt-lg-0">
-        <div class="row g-2 g-md-3">
-          <div class="col-6 col-lg-12">
-            <FeaturePost post={metas[1]} />
+{
+  metas.length === 3 && (
+    <div class="list-top-pushes mb-3 mb-md-4 mb-lg-5">
+      <div class="container">
+        <div class="row gx-2 gx-md-3 list-grouped">
+          <div class="col-lg-8">
+            <FeaturePost post={metas[0]} />
           </div>
-          <div class="col-6 col-lg-12">
-            <FeaturePost post={metas[2]} />
+          <div class="col-lg-4 d-flex flex-column mt-2 mt-md-3 mt-lg-0">
+            <div class="row g-2 g-md-3">
+              <div class="col-6 col-lg-12">
+                <FeaturePost post={metas[1]} />
+              </div>
+              <div class="col-6 col-lg-12">
+                <FeaturePost post={metas[2]} />
+              </div>
+            </div>
           </div>
         </div>
       </div>
     </div>
-  </div>
-</div>
+  )
+}