.github/workflows/wake-up-streamlit.yml

name: Keep Streamlit Warm

on:
  schedule:
    - cron: "0 */5 * * *"
  workflow_dispatch:

jobs:
  warm_app:
    runs-on: ubuntu-latest
    timeout-minutes: 15

    steps:
      - name: Set up Node.js
        uses: actions/setup-node@v4
        with:
          node-version: "20"

      - name: Install Playwright
        run: |
          npm init -y
          npm install playwright
          npx playwright install --with-deps chromium

      - name: Wake Streamlit Community Cloud app
        env:
          APP_URL: https://plexi-study.streamlit.app/
        run: |
          cat <<'EOF' > wake-streamlit.mjs
          import { chromium } from "playwright";

          const appUrl = process.env.APP_URL;
          const browser = await chromium.launch({ headless: true });
          const page = await browser.newPage({ viewport: { width: 1440, height: 900 } });

          try {
            await page.goto(appUrl, { waitUntil: "domcontentloaded", timeout: 90000 });

            const wakeButton = page
              .getByRole("button", { name: /yes, get this app back up|wake up/i })
              .first();

            if (await wakeButton.isVisible({ timeout: 10000 }).catch(() => false)) {
              await wakeButton.click();
              await page.waitForTimeout(8000);
              console.log("App was asleep. Wake-up button clicked.");
            } else {
              console.log("Wake-up prompt not shown.");
            }

            await page.waitForSelector(
              "[data-testid='stAppViewContainer'], section.main, div[data-testid='stApp']",
              { timeout: 90000 }
            );

            console.log("App is reachable.");
          } finally {
            await browser.close();
          }
          EOF
          node wake-streamlit.mjs