add: キャッシュに有効期限を設定

src/lib/server/Metadatas.js

@@ -5,6 +5,8 @@ import path from 'node:path';
 import Posts from './PostList';
 import Load from './LoadPost';
 
+import { dev } from '$app/environment';
+
 async function Metadatas() {
 
     const cache_dir = '/tmp/day.moris.blog/';
@@ -21,29 +23,46 @@ async function Metadatas() {
 
         const sorted = metadataList
             .sort((a,b)=>{
-            return b.metadata.date.getTime() - a.metadata.date.getTime()
-        })
+                return b.metadata.date.getTime() - a.metadata.date.getTime()
+            })
             .filter((m)=> dev||m.metadata.published)
 
         return sorted
     }
 
+    async function makeCache() {
+        let data = await build()
+        let cache_data = {
+            cached_time: Date.now(),
+            dev,
+            data
+        }
+
+        if (!fs.existsSync(cache_dir)) {
+            fs.mkdirSync(cache_dir), {recursive: true}
+        }
+
+        fs.writeFileSync(cache_file, JSON.stringify(cache_data, null, 2), 'utf8')
+        return data
+    }
+
 
     if (fs.existsSync(cache_file)) {
-        const metas = JSON.parse(fs.readFileSync(cache_file, 'utf8'), (key,value)=>{
+        const cache = JSON.parse(fs.readFileSync(cache_file, 'utf8'), (key,value)=>{
             if(key=='date'){
                 return (new Date(value));
             }
             return value
         })
 
-        return metas
+        if (cache.dev^dev || Date.now()-cache.cached_time>5*60000) {
+            const data = await makeCache()
+            return data
+        } else {
+            return cache.data
+        }
     } else {
-        const metas = await build()
-
-        if(!fs.existsSync(cache_dir)){fs.mkdirSync(cache_dir), {recursive: true}}
-        fs.writeFileSync(cache_file, JSON.stringify(metas), 'utf8')
-
-        return metas
+        const data = await makeCache()
+        return data
     }
 }