function escapeXml(s) {
    return String(s)
        .replace(/&/g, '&')
        .replace(/</g, '&lt;')
        .replace(/>/g, '&gt;')
        .replace(/"/g, '&quot;');
}

function caps() {
    return `<?xml version="1.0" encoding="UTF-8"?>
<caps>
  <server version="1.0" title="Webshare" strapline="Webshare.cz" url="https://webshare.cz"/>
  <limits max="100" default="25"/>
  <registration available="no" open="no"/>
  <searching>
    <search available="yes" supportedParams="q"/>
    <tv-search available="yes" supportedParams="q,season,ep"/>
    <movie-search available="yes" supportedParams="q"/>
    <music-search available="no" supportedParams=""/>
    <book-search available="no" supportedParams=""/>
  </searching>
  <categories>
    <category id="2000" name="Movies"/>
    <category id="5000" name="TV"/>
    <category id="5040" name="TV/HD"/>
    <category id="5030" name="TV/SD"/>
  </categories>
</caps>`;
}

function feed(items, baseUrl) {
    const pubDate = new Date().toUTCString();
    const itemsXml = items.map(item => `    <item>
      <title>${escapeXml(item.name)}</title>
      <guid isPermaLink="false">${escapeXml(item.ident)}</guid>
      <pubDate>${pubDate}</pubDate>
      <category>5040</category>
      <enclosure url="${escapeXml(baseUrl + '/download/' + item.ident)}" length="${item.size}" type="application/x-bittorrent"/>
      <torznab:attr name="category" value="5040"/>
      <torznab:attr name="size" value="${item.size}"/>
      <torznab:attr name="seeders" value="1"/>
      <torznab:attr name="peers" value="1"/>
      <torznab:attr name="downloadvolumefactor" value="0"/>
      <torznab:attr name="uploadvolumefactor" value="1"/>
    </item>`).join('\n');

    return `<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0" xmlns:torznab="http://torznab.com/schemas/2015/feed">
  <channel>
    <title>Webshare</title>
    <description>Webshare.cz API (Torznab façade)</description>
    <link>https://webshare.cz</link>
${itemsXml}
  </channel>
</rss>`;
}

module.exports = { caps, feed };