$ req = web.tx.request

$if req.method == "GET":
    <p>Bookmarklet: <a href="javascript:(function(){
      window.location.href='https://ragt.ag/rsvp?url='+
        encodeURIComponent(window.location.href)
    })()">RSVP</a> <small>(drag to browser toolbar to install)</small></p>
    
    $ url = req.uri.query.get('url', [None])[0]
    <form method=post action=/rsvp>
    <label><small>Event URL:</small><br>
    <input name=event_url value="$url" style=width:30em></label><br>
    $if url:
        $ event = web.get(url).entry
        <p>$event["name"]<br><img src="$event['photo']"></p>
    <fieldset>
    <legend>RSVP</legend>
    $for response in ("yes", "no", "maybe"):
        <label><input type=radio name=response
        value=$response> $response.capitalize()</label>
    </fieldset>
    <button>RSVP</button>
    </form>
    <code style=font-size:.8em>$web.tx.user.session</code>
$elif req.method == "POST":
    $ form = web.form("event_url", "response")
    $if token := web.tx.user.session.get("token", [None])[0]:
        $ mp_resp = web.post("https://micro.blog/micropub",
        $   headers={
        $     "Authorization": f"Bearer {token}",
        $     "Content-Type": "application/x-www-form-urlencoded",
        $   },
        $   data={
        $   "h": "entry",
        $   "in_reply_to": form.event_url,
        $   "rsvp": form.response,
        $ })
        $mp_resp.text
        <p>RSVP'd to <code>$form.event_url</code></p>
    $else:
        <p>Your host does not support access tokens.</p>