refactor: bangumi 每日放送添加id 修改缓存时间 (#2097)

* update: bangumi 每日放送添加id 修改缓存时间

* update: 恢复计算今日的方法

lib/routes/bangumi/calendar/_base.js

@@ -1,5 +1,19 @@
 const axios = require('../../../utils/axios');
 
+/** @type { (timezoneOffset: number) => Date } */
+const tomorrowMidnight = (timezoneOffset) => {
+    const result = new Date(Date.now());
+    const localHour = result.getHours() + timezoneOffset;
+    if (localHour < 0) {
+        result.setUTCHours(-timezoneOffset, 0, 0, 0);
+    } else if (localHour < 24) {
+        result.setUTCHours(24 - timezoneOffset, 0, 0, 0);
+    } else {
+        result.setUTCHours(48 - timezoneOffset, 0, 0, 0);
+    }
+    return result;
+};
+
 module.exports = async (ctx) => {
     const bgmCalendarUrl = 'https://api.bgm.tv/calendar';
     const bgmDataUrl = 'https://cdn.jsdelivr.net/npm/bangumi-data/dist/data.json';
@@ -33,7 +47,7 @@ module.exports = async (ctx) => {
                     data.items = items;
                 }
 
-                ctx.cache.set(url[i], JSON.stringify(data), 86400);
+                ctx.cache.set(url[i], JSON.stringify(data), tomorrowMidnight(8).getTime() - Date.now());
                 return Promise.resolve(data);
             }
         })

lib/routes/bangumi/calendar/today.js

@@ -4,10 +4,12 @@ module.exports = async (ctx) => {
     const [list, data] = await getData(ctx);
     const siteMeta = data.siteMeta;
 
-    const now = new Date(Date.now());
+    const today = new Date(Date.now());
 
-    now.setHours(now.getHours() + 9);
-    const day = now.getUTCDay();
+    // 将 UTC 时间向前移动9小时，即可在数值上表示东京时间
+    today.setUTCHours(today.getUTCHours() + 9);
+
+    const day = today.getUTCDay();
 
     const todayList = list.filter((l) => l.weekday.id % 7 === day)[0];
 
@@ -33,6 +35,9 @@ module.exports = async (ctx) => {
             updated.setMinutes(begin.getMinutes());
             updated.setSeconds(begin.getSeconds());
 
+            const link = `http://bangumi.tv/subject/${bgm.bgm_id}`;
+            const id = `${link}#${new Intl.DateTimeFormat('zh-CN').format(updated)}`;
+
             const image = `<img referrerpolicy="no-referrer" src=${bgm.image} />`;
             const html =
                 image +
@@ -51,6 +56,8 @@ module.exports = async (ctx) => {
                 '</ul>';
 
             return {
+                id,
+                guid: id,
                 title: [
                     bgm.title,
                     Object.values(bgm.titleTranslate)
@@ -59,7 +66,7 @@ module.exports = async (ctx) => {
                 ].join('｜'),
                 updated: updated.toISOString(),
                 pubDate: updated.toUTCString(),
-                link: `http://bangumi.tv/subject/${bgm.bgm_id}`,
+                link,
                 description: html,
                 content: { html },
             };