implement rss-to-twitter workflow

.github/workflows/rss-to-twitter.yml

@@ -0,0 +1,34 @@
+name: rss-to-twitter
+
+on:
+  schedule:
+    # everyday at 01:00 UTC (10:00 JST)
+    - cron: '0 1 * * *'
+
+jobs:
+  twitter:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: azu/rss-to-twitter@v2
+        with:
+          # RSS feed URL
+          RSS_URL: "https://utelecon.adm.u-tokyo.ac.jp/notice/rss.xml"
+          # UPDATE_WITHIN_MINUTES is calculated from cron schedule to be 1 day
+          TWEET_TEMPLATE: '%title% %url%'
+          TWITTER_APIKEY: ${{ secrets.TWITTER_APIKEY }}
+          TWITTER_APIKEY_SECRET: ${{ secrets.TWITTER_APIKEY_SECRET }}
+          TWITTER_ACCESS_TOKEN: ${{ secrets.TWITTER_ACCESS_TOKEN }}
+          TWITTER_ACCESS_TOKEN_SECRET: ${{ secrets.TWITTER_ACCESS_TOKEN_SECRET }}
+  twitter-en:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: azu/rss-to-twitter@v2
+        with:
+          # RSS feed URL
+          RSS_URL: "https://utelecon.adm.u-tokyo.ac.jp/en/notice/rss.xml"
+          # UPDATE_WITHIN_MINUTES is calculated from cron schedule to be 1 day
+          TWEET_TEMPLATE: '%title% %url%'
+          TWITTER_APIKEY: ${{ secrets.TWITTER_EN_APIKEY }}
+          TWITTER_APIKEY_SECRET: ${{ secrets.TWITTER_EN_APIKEY_SECRET }}
+          TWITTER_ACCESS_TOKEN: ${{ secrets.TWITTER_EN_ACCESS_TOKEN }}
+          TWITTER_ACCESS_TOKEN_SECRET: ${{ secrets.TWITTER_EN_ACCESS_TOKEN_SECRET }}

src/components/pages/rss.ts

@@ -36,7 +36,8 @@ export async function rss({ title, description, url, lang }: RssParams) {
     itemsMap.set(link, {
       title,
       link,
-      pubDate: new Date(notice.date),
+      // 12:00 of the day in order for rss-to-twitter to work correctly
+      pubDate: new Date(notice.date.getTime() + 12 * 60 * 60 * 1000),
     });
   }