141 lines
3.9 KiB
PHP
141 lines
3.9 KiB
PHP
<?php
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declare(strict_types=1);
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namespace Shimmie2;
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class XMLSitemapURL
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{
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public function __construct(
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public string $url,
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public string $changefreq,
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public string $priority,
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public string $date
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) {
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}
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}
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class XMLSitemap extends Extension
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{
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public function onPageRequest(PageRequestEvent $event): void
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{
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if ($event->page_matches("sitemap.xml")) {
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global $config, $page;
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$cache_path = data_path("cache/sitemap.xml");
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if ($this->new_sitemap_needed($cache_path)) {
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$xml = $this->handle_full_sitemap();
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file_put_contents($cache_path, $xml);
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}
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$xml = \Safe\file_get_contents($cache_path);
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$page->set_mode(PageMode::DATA);
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$page->set_mime(MimeType::XML_APPLICATION);
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$page->set_data($xml);
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}
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}
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// Full sitemap
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private function handle_full_sitemap(): string
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{
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global $database, $config;
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$urls = [];
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// add index
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$urls[] = new XMLSitemapURL(
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$config->get_string(SetupConfig::FRONT_PAGE),
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"weekly",
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"1",
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date("Y-m-d")
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);
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/* --- Add 20 most used tags --- */
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foreach ($database->get_col("SELECT tag FROM tags ORDER BY count DESC LIMIT 20") as $tag) {
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$urls[] = new XMLSitemapURL(
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"post/list/$tag/1",
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"weekly",
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"0.9",
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date("Y-m-d")
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);
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}
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/* --- Add latest images to sitemap with higher priority --- */
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foreach (Search::find_images(limit: 50) as $image) {
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$urls[] = new XMLSitemapURL(
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"post/view/$image->id",
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"weekly",
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"0.8",
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date("Y-m-d", \Safe\strtotime($image->posted))
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);
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}
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/* --- Add other tags --- */
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foreach ($database->get_col("SELECT tag FROM tags ORDER BY count DESC LIMIT 10000 OFFSET 21") as $tag) {
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$urls[] = new XMLSitemapURL(
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"post/list/$tag/1",
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"weekly",
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"0.7",
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date("Y-m-d")
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);
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}
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/* --- Add all other images to sitemap with lower priority --- */
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foreach (Search::find_images(offset: 51, limit: 10000) as $image) {
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$urls[] = new XMLSitemapURL(
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"post/view/$image->id",
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"monthly",
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"0.6",
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date("Y-m-d", \Safe\strtotime($image->posted))
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);
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}
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/* --- Display page --- */
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return $this->generate_sitemap($urls);
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}
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/**
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* @param XMLSitemapURL[] $urls
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*/
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private function generate_sitemap(array $urls): string
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{
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$xml = "<" . "?xml version=\"1.0\" encoding=\"utf-8\"?" . ">\n" .
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"<urlset xmlns=\"http://www.sitemaps.org/schemas/sitemap/0.9\">\n";
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foreach ($urls as $url) {
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$link = make_http(make_link($url->url));
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$xml .= "
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<url>
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<loc>$link</loc>
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<lastmod>$url->date</lastmod>
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<changefreq>$url->changefreq</changefreq>
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<priority>$url->priority</priority>
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</url>
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";
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}
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$xml .= "</urlset>\n";
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return $xml;
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}
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/**
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* Returns true if a new sitemap is needed.
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*/
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private function new_sitemap_needed(string $cache_path): bool
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{
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if (!file_exists($cache_path)) {
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return true;
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}
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$sitemap_generation_interval = 86400; // allow new site map every day
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$last_generated_time = filemtime($cache_path);
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// if file doesn't exist, return true
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if ($last_generated_time == false) {
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return true;
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}
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// if it's been a day since last sitemap creation, return true
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return ($last_generated_time + $sitemap_generation_interval < time());
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}
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}
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