#hitode909memorial_viewer

fetch.sh

#!/bin/bash

set -ue

cp /Users/pastak/worktmp/wedpar-namecard/list.txt /Users/pastak/worktmp/wedpar-namecard/list.txt.tmp
twurl "/1.1/search/tweets.json?q=%23hitode909memorial" \
          | jq .statuses[].entities | grep media_url_https | perl -ne '$_ =~ /"media_url_https": "([^"]+)"/; print "$1\n"'  \
          >> /Users/pastak/worktmp/wedpar-namecard/list.txt.tmp
cat /Users/pastak/worktmp/wedpar-namecard/list.txt.tmp | uniq > /Users/pastak/worktmp/wedpar-namecard/list.txt

index.ts

import Koa from 'koa';
import Router from 'koa-router';

import fs from 'fs';

const app = new Koa();
const router = new Router();

router.get('/memorial', (ctx) => {
  ctx.body =  `
  <div style='width: 95vw;text-align: center;'>
  <img id='mainImg' style='margin: auto;max-width: 100vw; max-height: 95vh;'/>
  </div>
  <script>
    const a = () => {
      const mainImg = document.querySelector('#mainImg');
      fetch('/memorial-list')
        .then(r => r.text())
        .then(t => {
          mainImg.src = t;
         setTimeout(a, 10 * 1000)
        })
    }
    a();
  </script>
 `  
});

router.get('/memorial-list', (ctx) => {
  const list = fs.readFileSync('list.txt').toString();
  const lines = list.split('\n');
  ctx.body = lines[Math.floor(Math.random() * lines.length)];  
});

app
  .use(router.routes())
  .use(router.allowedMethods());

const port = process.env.PORT || 3000;

app.listen(port, () => {
  console.log('listening on port ' + port);
})