<?php

require_once __DIR__ . '/db.php';

function post_to_item(DOMDocument $dom, Array $post) {
      $mime_type = $post['MIME_TYPE'];
      $post_id = $post['ID'];
      $post_body = $post['BODY'];
      $timestamp = $post['TIMESTAMP'];
      $item = $dom->createElement('item');
      $description = $dom->createElement('description', $post_body);
      $link = $dom->createElement('link', "https://pics.jacobcasper.com/#post-{$post_id}");
      $guid = $dom->createElement('guid', "https://pics.jacobcasper.com/#post-{$post_id}");
      $pub_date = $dom->createElement('pubDate', date(DATE_RSS, $timestamp));
      // TODO write the endpoint for this
      //$enclosure = $dom->createElement('enclosure');
      //$enclosure->setAttribute('url', "https://pics.jacobcasper.com/pic/{$post_id}");
      //$enclosure->setAttribute('length', "9999");
      //$enclosure->setAttribute('type', $mime_type);
      $item->appendChild($description);
      //$item->appendChild($enclosure);
      $item->appendChild($link);
      $item->appendChild($guid);
      $item->appendChild($pub_date);
      return $item;
}

$rss_template = file_get_contents('rss.template.xml');
$rss_dom = new DOMDocument();
$rss_dom->formatOutput = true;
$rss_dom->loadXML($rss_template);
$channel_node = $rss_dom->firstChild->childNodes[1];
$db = get_db();
$posts = $db->query('SELECT
    p.ID, p.TIMESTAMP, pi.MIME_TYPE, c.BODY
    FROM posts p
    JOIN pics pi on p.id = pi.post_id
    JOIN comments c on p.id = c.post_id
    ORDER BY p.TIMESTAMP DESC');
while ($post = $posts->fetchArray()) {
    $item = post_to_item($rss_dom, $post);
    $channel_node->appendChild($item);
}

file_put_contents('rss.xml', $rss_dom->saveXML());