bsky-deletions/index.html at main · uniphil/bsky-deletions · GitHub

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<!doctype html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <title>Final words</title>
    <meta name="description" content="Glimpses of deleting bluesky posts." />
    <meta property="og:site_name" content="Final words" />
    <link rel="canonical" href="https://deletions.bsky.bad-example.com/" />
    <script type="application/ld+json">
    {
      "@context" : "https://schema.org",
      "@type" : "WebSite",
      "name" : "Final words",
      "url" : "https://deletions.bsky.bad-example.com/",
    }
    </script>
    <style type="text/css">

.js .no-js-ohno { display: none; }

body {
  background: #323;
  color: #bba;
  font-family: 'Iowan Old Style', 'Palatino Linotype', 'URW Palladio L', P052, serif;
  font-size: 16pt;
  font-weight: normal;
  line-height: 1.4em;
  margin: 0;
  padding: 0;
}

h1 {
  font-size: 1.5em;
  margin: 0.5em 0;
}
p {
  margin: 0.5em 0;
}
a {
  color: inherit;
}
#lang-selector {
  column-gap: 0.4em;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5em;
  margin: 0.5em 0;
  row-gap: 0.3em;
}

.layout {
  display: flex;
  min-height: 100vh;
}
.layout .meta {
  background: #111;
  border-style: solid;
  border-color: hsla(0, 0%, 100%, 0.1);
  border-width: 0 2px 0 0;
  box-sizing: border-box;
  flex: 0 1 12em;
  line-height: 1em;
  padding: 1em;
}
.layout .content {
  flex: 0 1 24em;
  max-width: 24em;
  padding: 1em 1em 4em;
  position: relative;
}
.thanks {
  align-items: baseline;
  bottom: 0;
  display: flex;
  font-family: sans-serif;
  font-size: 0.667em;
  gap: 1em;
  line-height: 1.1;
  margin: 0 auto;
  opacity: 0.5;
  position: absolute;
}
.thanks:hover {
  opacity: 0.8;
}

@media screen and (max-width: 30em) {
  body {
    font-size: 15pt;
  }
  .layout {
    flex-direction: column;
  }
  .layout .meta {
    min-height: 0;
    border-width: 0 0 2px;
    flex-basis: auto;
    flex-shrink: 0;
    flex-grow: 0;
  }
  .layout .content {
    flex-basis: auto;
    flex-grow: 1;
  }
  h1 {
    margin-top: 0.5rem;
  }
}

.info {
  font-size: 0.667em;
}

.info.connection {
  display: none;
}
.info.connection.timeout {
  display: block;
  color: #c70;
}

.posts-area {
  margin: 1em auto;
}

.stack-frame {
  --bottom: 50px;
  box-sizing: : border-box;
  margin: 0.1em 0;
  overflow: hidden;
  position: relative;
  padding-bottom: var(--bottom);

  animation:
    5s ease-out 3s fade,
    3s ease-in-out 5s leave;
}

.post {
  background: #1f141f;
  border-radius: 0.5rem;
  box-sizing: border-box;
  cursor: pointer;
  font-style: italic;
  margin: 0;
  overflow-wrap: break-word;
  padding: 0.5em 0.8em 0;
  position: relative;
  text-align: center;
  width: 100%;
  z-index: 1;
}
.post .wordy {
  -webkit-box-orient: vertical;
  box-orient: vertical;

  display: -webkit-box;
  display: box;

  -webkit-line-clamp: 4;
  line-clamp: 4;

  font-size: 0.8em;
  overflow: hidden;
}

.post:not(:first-child) {
  position: absolute;
  z-index: calc(-1 * var(--n));
  bottom: calc(var(--bottom) - 2px - var(--n) * 13px);
  transform: rotate(calc(var(--n) * 0.8deg));
  scale: calc(1 - var(--n) * .04);
  opacity: calc(.7 - var(--n) * 0.05);
}
.post:nth-child(2) { --n: 1; }
.post:nth-child(3) { --n: 2; }
.post:nth-child(4) { --n: 3; }
.post:nth-child(5) { --n: 4; }
.post:nth-child(6) { --n: 5; }
.post:nth-child(7) { --n: 6; }
.post:nth-child(8) { --n: 7; }
.post:nth-child(9) { --n: 8; }
.post:nth-child(10) { --n: 9; }
.post:nth-child(11) { --n: 10; }
.post:nth-child(12) { --n: 11; }
.post:nth-child(13) { --n: 12; }

.post .post-info {
  color: #666;
  font-size: 0.667em;
  font-family: sans-serif;
  font-style: normal;
  line-height: 1;
  margin: 0 -0.8rem 0 0;
  padding: 0 0.2em 0.2em;
  text-align: right;
}

.post:not(.waiting) {
  border: 2px solid hsla(0, 0%, 100%, 0.1);
  animation: 0.5s ease-in arrive;
}

.post.waiting {
  background: transparent;
  animation:
    0.5s ease-in arrive;
}
.post.waiting.leaving {
  animation:
    5s ease-out fade,
    3s ease-in-out 2s leave;
}

@keyframes arrive {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fade {
  from { opacity: 1; }
  to { opacity: 0; }
}

@keyframes leave {
  from {
    margin-bottom: 0;
    scale: 100%;
  }
  to {
    margin-bottom: calc(var(--h) - 0.1em); /* 0.1em matches the frame margin */
    scale: 70%;
  }
}

    </style>
    <script type="text/javascript">document.querySelector('html').classList.add('js')</script>
  </head>

  <body>
    <div class="layout">
      <div class="meta">
        <h1>Final words</h1>
        <p class="info">Glimpses of deleting bluesky posts. Observing: <span id="info-observers"><em>waiting&hellip;</em></span></p>
        <details id="filter-langs">
          <summary>Filter language</summary>
          <form id="lang-selector"></form>
        </details>
        <p class="info connection">
          system status: missed connection
        </p>
      </div>

      <div class="content">
        <p class="no-js-ohno">Unfortunately, JavaScript is required to glimpse deleted posts as they go.</p>

        <div class="posts-area">
          <div class="post waiting">
            <p>Listening for deletions&hellip;</p>
          </div>
        </div>

        <div class="thanks">
          <a href="https://bsky.app/profile/bad-example.com/post/3l53o5atwio2t" target="_blank">about</a>
          <a href="https://docs.google.com/forms/d/e/1FAIpQLSeuV32IJL_xWKCHD6JsuWa8D60-0n10LQ6Fn5_Iw1Jj9hyKAQ/viewform" target="_blank">feedback</a>
          <details>
            <summary>thanks</summary>
            <p>data: bluesky's public <a href="https://github.com/bluesky-social/jetstream" target="_blank">jetstream</a> instance.</p>
          </details>
        </div>
      </div>
    </div>

    <script type="text/javascript">
window.onerror = (message, source, lineno, colno, e) => navigator.sendBeacon('/oops',
  JSON.stringify({ message, source, lineno, colno, stack: e && e.stack }));
    </script>

    <script type="text/javascript">
const SHOW_WAITING_AFTER_MS = 1000;
const DISCONNECT_TIMEOUT = 25 * 1000; // server sends observers every 12s
const RECONNECT_RETRY = 3000;
const STACK_CAPTURE_TIME = 1200; // ms; posts within this will be stacked

const crel = (tagName, classes) => {
  const el = document.createElement(tagName);
  if (classes !== undefined) {
    el.classList.add.apply(el.classList, classes);
  }
  return el;
};

const postsAreaEl = document.querySelector('.posts-area');
const waitingEl = document.querySelector('.post.waiting');
const langSelectorForm = document.querySelector('#lang-selector');
const includeUnsetLangInput = crel('input');
const observersInfoEl = document.querySelector('#info-observers');
const connectionStatusEl = document.querySelector('.info.connection');


// websocket connection & message handling

let ws;
const connect = langs => {
  const wsProto = window.location.protocol === 'https:' ? 'wss:' : 'ws:';
  const wsParams = new URLSearchParams();
  langs.forEach(lang => wsParams.append('lang', lang));
  const wsUrl = `${wsProto}//${window.location.host}/?${wsParams}`;
  console.info('ws connect', wsUrl);
  ws = new WebSocket(wsUrl);
  ws.onopen = petWatchdog;
  ws.onclose = () => missedU(1, 'ws.onclose');
  ws.onerror = e => { ws.close(); console.error(e) };
  ws.onmessage = ({ data }) => {
    petWatchdog();
    const content = JSON.parse(data);
    const { type } = content;
    if (type === 'post') {
      createPost(content.post);
    } else if (type == 'observers') {
      updateObservers(content.observers);
    } else {
      console.info('other message', content);
    }
  };
};

let wdt;
let reconTimer;
const missedU = (n, msg) => {
  console.info('missedU', msg)
  connectionStatusEl.classList.add('timeout');
  let t = RECONNECT_RETRY * Math.pow(1.4, (n ?? 0));
  t *= Math.random() / 10 + 1;
  reconTimer = setTimeout(() => {
    if (ws.readyState === ws.CLOSED) {
      connect(getSelectedLangs());
    } else {
      missedU((n ?? 0) + 1, `${msg}.reconTimer`);
    }
  }, t);
};
const petWatchdog = () => {
  connectionStatusEl.classList.remove('timeout');
  clearTimeout(wdt);
  clearTimeout(reconTimer);
  wdt = setTimeout(() => missedU(0, 'wdt'), DISCONNECT_TIMEOUT);
};
let initialLangs = {{ .BrowserLangs }};
try { initialLangs = JSON.parse(localStorage.getItem('langs')) || initialLangs; }
catch (e) { console.warn('could not load saved langs', e) }
connect(initialLangs);

let waitingTimer;
waitingEl.style.setProperty('--h', `-${waitingEl.getBoundingClientRect().height}px`);
waitingEl.remove(); // initially hide
waitingEl.addEventListener('animationend', event => {
  if (event.animationName === 'leave') waitingEl.remove();
});
waitingTimer = setTimeout(showListeningMessage, SHOW_WAITING_AFTER_MS);


// post rendering

const getNiceAge = ms => {
  const secs = Math.round(ms / 1000);
  if (secs < 45) {
    return `${secs} sec`;
  }
  const mins = Math.round(secs / 60);
  if (mins < 45) {
    return `${mins} min`;
  }
  const hrs = Math.round(mins / 60);
  return `${hrs} hr`;
}

let currentStackFrame;
let currentStackTime;

function newStack() {
  const myStackFrame = crel('div', ['stack-frame']);
  currentStackTime = +new Date();
  if (postsAreaEl.contains(waitingEl)) {
    waitingEl.classList.add('leaving');
  }

  let cleanupTimer;
  const cleanup = () => {
    clearTimeout(cleanupTimer);
    if (postsAreaEl.childElementCount === 1) { // we are the last one
      clearTimeout(waitingTimer);
      waitingTimer = setTimeout(showListeningMessage, SHOW_WAITING_AFTER_MS);
    }
    myStackFrame.remove();
  };

  myStackFrame.addEventListener('click', event => {
    if (event.target.classList.contains('stack-frame')) return;
    const first = myStackFrame.firstChild;
    first.remove();
    myStackFrame.appendChild(first);
  });

  myStackFrame.addEventListener('animationend', event => {
    if (event.animationName === 'arrive') {
      myStackFrame.style.setProperty('--h', `-${myStackFrame.getBoundingClientRect().height}px`);
    } else if (event.animationName === 'leave') {
      cleanup();
    }
  });

  cleanupTimer = setTimeout(cleanup, 20000); // backup to remove nodes if we miss `animationend`
  postsAreaEl.appendChild(myStackFrame);
  currentStackFrame = myStackFrame;
}

function createPost(post) {
  if (!currentStackFrame) {
    newStack();
  } else if ((+new Date() - currentStackTime) > STACK_CAPTURE_TIME) {
    newStack();
  } else if (currentStackFrame.childElementCount >= 13) {
    return; // cap the stack
  }

  const { text, target } = post.value;

  const postEl = crel('div', ['post']);
  let wordy = text.length > 100;

  const paras = text
    .replace(/\n\s*\n/g, '\n')
    .split('\n')
    .map((p, i) => {
      const postP = crel('p');
      postP.textContent = p;
      if (i > 3) postEl.classList.add('wordy');
      return postP;
    });

  let postContentContainer = postEl;
  if (wordy) {
    postContentContainer = crel('div', ['wordy']);
    postEl.appendChild(postContentContainer);
  }
  paras.forEach(p => postContentContainer.appendChild(p));

  let postTypeName = 'post';
  if (target === 'reply') postTypeName = 'reply';
  else if (target === 'quote') postTypeName = 'quote post';

  const postInfoEl = crel('div', ['post-info']);
  postInfoEl.textContent = postTypeName;
  postInfoEl.textContent += post.likes ? `, ${post.likes} like${post.likes > 1 ? 's': ''}` : '';
  postInfoEl.textContent += `, age ${getNiceAge(post.age)}`;
  postEl.appendChild(postInfoEl);

  currentStackFrame.appendChild(postEl);
}

function showListeningMessage() {
  if (postsAreaEl.children.length > 0) return;
  waitingEl.classList.remove('leaving');
  postsAreaEl.appendChild(waitingEl);
}


// you and who

function updateObservers(observers) {
  if (observers <= 1) {
    observersInfoEl.textContent = 'just you.';
  } else if (observers == 2) {
    observersInfoEl.textContent = 'you and one other.';
  } else if (observers == 3) {
    observersInfoEl.textContent = 'you and two others.';
  } else if (observers == 4) {
    observersInfoEl.textContent = 'you and three others.';
  } else if (observers == 5) {
    observersInfoEl.textContent = 'you and four others.';
  } else {
    observersInfoEl.textContent = `you and ${observers-1} others.`;
  }
}


// controls

{{ .KnownLangs }}.forEach(lang => {
  const langEl = crel('label');
  langSelectorForm.appendChild(langEl);
  const langBox = crel('input');
  langBox.type = 'checkbox';
  if (initialLangs.includes(lang)) langBox.checked = true;
  langBox.name = lang;
  langBox.addEventListener('input', changeLanguageSelection);
  langEl.appendChild(langBox);
  langEl.appendChild(document.createTextNode(lang));
  langSelectorForm.appendChild(document.createTextNode(' '));
});
(includeUntaggedLangs => {
  const filterLangsEl = document.querySelector('#filter-langs');
  const p = crel('p');
  filterLangsEl.appendChild(p);
  const label = crel('label');
  p.appendChild(label);
  const input = crel('input');
  label.appendChild(includeUnsetLangInput);
  const text = document.createTextNode(' include unknown');
  label.appendChild(text);

  includeUnsetLangInput.type = 'checkbox';
  includeUnsetLangInput.checked = includeUntaggedLangs;
  includeUnsetLangInput.addEventListener('input', changeLanguageSelection);
})(initialLangs.includes(null));
function getSelectedLangs() {
  const langs = Array.from(new FormData(langSelectorForm).keys());
  if (includeUnsetLangInput.checked) langs.push(null);
  return langs;
}
function changeLanguageSelection() {
  const langs = getSelectedLangs();
  try { localStorage.setItem('langs', JSON.stringify(langs)); }
  catch (e) { console.error('could not save lang selection', e); }
  ws.send(JSON.stringify({ type: 'setLangs', langs }));
}
    </script>
  </body>
</html>