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xml-feed-generator
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jasmine 2023-10-17 21:13:20 +07:00 committed by GitHub
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<?php
// work in progress!!
// create beginning of feed template.
// reference for required elements: https://validator.w3.org/feed/docs/atom.html
ob_start();
date_default_timezone_set("Asia/Jakarta");
echo '<?xml version="1.0" encoding="utf-8"?>'
.'<feed xmlns="http://www.w3.org/2005/Atom">'
// optionally specify feed generator for debugging purposes.
.'<generator version="1.0">jasmine&apos;s PHP feed generator!! | last modified by system at ' . strtoupper(date("h:i:sa")) . ' (GMT+7)</generator>'
.'<title>jasmine&apos;s b(rain)log | jasm1nii.xyz</title>'
.'<subtitle>blog articles by jasmine</subtitle>'
.'<id>https://jasm1nii.xyz/blog/articles</id>';
echo '<link rel="self" href="https://jasm1nii.xyz/blog/articles/articles.xml" type="application/atom+xml"/>';
echo '<link rel="alternate" href="https://jasm1nii.xyz/blog/articles" type="text/html"/>';
// define path to fetch pages from.
$root = dirname(__DIR__, 2);
$blog = $root.'/blog/articles';
// force libxml to parse all HTML elements, including HTML 5. by default, the extension can only read valid HTML 4.
libxml_use_internal_errors(true);
// match feed update time with the newest entry.
// i'm personally not using the system modification time to avoid sending uneccessary notifications to feed readers.
$article_list = glob($blog.'/*/*/*/*.html');
$first_article = array_pop($article_list);
$first_article_content = file_get_contents($first_article);
$first_article_dom = new DOMDocument;
$first_article_dom->loadHTML($first_article_content);
$feed_updated = $first_article_dom->getElementsByTagName('time');
foreach ($feed_updated as $feed_updated_text) {
echo '<updated>' . $feed_updated_text->getAttribute('datetime') . 'T00:00:00+07:00</updated>';
}
// rest of the template.
echo '<author>'
.'<name>jasmine</name>'
.'<email>contact@jasm1nii.xyz</email>'
.'<uri>https://jasm1nii.xyz/</uri>'
.'</author>'
.'<icon>https://jasm1nii.xyz/assets/media/itchio-textless-white.svg</icon>'
.'<logo>https://jasm1nii.xyz/assets/media/main/07042023-me_compressed.webp</logo>';
// output entries.
$i = 0;
foreach (array_reverse(glob($blog.'/*/*/*/*.html')) as $article) {
$article_content = file_get_contents($article);
$article_dom = new DOMDocument;
$article_dom->loadHTML($article_content);
echo '<entry>';
// title
$title = $article_dom->getElementsByTagName('h2');
foreach ($title as $title_text) {
echo '<title>'.$title_text->nodeValue.'</title>';
}
// id
echo '<id>https://jasm1nii.xyz/blog/articles/' . ltrim($article, $blog) . '</id>';
// alternate link
echo '<link rel="alternate" type="text/html" href="https://jasm1nii.xyz/blog/articles/' . ltrim($article, $blog) . '"/>';
$updated = $article_dom->getElementsByTagName('time');
$t = 0;
foreach ($updated as $updated_text) {
echo '<updated>' . $updated_text->getAttribute('datetime') . 'T00:00:00+07:00</updated>';
if(++$t > 0) break;
}
// summary
$x = new DOMXPath($article_dom);
$summary_class = 'p-summary';
$summary = $x->query("//*[@class='" . $summary_class . "']");
if ($summary->length > 0) {
echo '<summary type="html">';
echo $summary->item(0)->nodeValue;
echo '</summary>';
}
// content
// HTML entities must be escaped - note that XML only defines five of them.
// reference: https://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references
$content_class = 'e-content';
$content = $x->query("//*[@class='" . $content_class . "']");
if ($content->length > 0) {
echo '<content type="html">' . preg_replace('/\s\s+/', ' ',(substr($content->item(0)->nodeValue,0,500))) . '... (&lt;a href="https://jasm1nii.xyz/blog/articles/' . ltrim($article, $blog) . '"&gt;read more&lt;/a&gt;)' . '</content>';
} else {
// fallback for older markup
$content_class = 'entry';
$content = $x->query("//*[@class='" . $content_class . "']");
if ($content->length >= 0) {
echo '<content type="html">' . 'whoops - this page contains markup that can&apos;t be parsed for feed-reader friendliness. read more on the website!' . '</content>';
}
}
echo '</entry>';
if(++$i > 9) break;
}
echo '</feed>';
$xml_str = ob_get_contents();
ob_end_clean();
file_put_contents($blog.'/articles.xml', $xml_str);
?>