page_matches("sitemap.xml")) {
global $config;
$this->sitemap_filepath = data_path("cache/sitemap.xml");
// determine if new sitemap needs to be generated
if ($this->new_sitemap_needed()) {
// determine which type of sitemap to generate
if ($config->get_bool("sitemap_generatefull", false)) {
$this->handle_full_sitemap(); // default false until cache fixed
} else {
$this->handle_smaller_sitemap();
}
} else {
$this->display_existing_sitemap();
}
}
}
public function onSetupBuilding(SetupBuildingEvent $event)
{
$sb = new SetupBlock("Sitemap");
$sb->add_bool_option("sitemap_generatefull", "Generate full sitemap");
$sb->add_label("
(Enabled: every image and tag in sitemap, generation takes longer)");
$sb->add_label("
(Disabled: only display the last 50 uploads in the sitemap)");
$event->panel->add_block($sb);
}
// sitemap with only the latest 50 images
private function handle_smaller_sitemap()
{
/* --- Add latest images to sitemap with higher priority --- */
$latestimages = Image::find_images(0, 50, []);
if (empty($latestimages)) {
return;
}
$latestimages_urllist = [];
$last_image = null;
foreach ($latestimages as $arrayid => $image) {
// create url from image id's
$latestimages_urllist[$arrayid] = "post/view/$image->id";
$last_image = $image;
}
$this->add_sitemap_queue(
$latestimages_urllist,
"monthly",
"0.8",
date("Y-m-d", strtotime($last_image->posted))
);
/* --- Display page --- */
// when sitemap is ok, display it from the file
$this->generate_display_sitemap();
}
// Full sitemap
private function handle_full_sitemap()
{
global $database, $config;
// add index
$index = [];
$index[0] = $config->get_string(SetupConfig::FRONT_PAGE);
$this->add_sitemap_queue($index, "weekly", "1");
/* --- Add 20 most used tags --- */
$popular_tags = $database->get_all("SELECT tag, count FROM tags ORDER BY `count` DESC LIMIT 0,20");
foreach ($popular_tags as $arrayid => $tag) {
$tag = $tag['tag'];
$popular_tags[$arrayid] = "post/list/$tag/";
}
$this->add_sitemap_queue($popular_tags, "monthly", "0.9" /* not sure how to deal with date here */);
/* --- Add latest images to sitemap with higher priority --- */
$latestimages = Image::find_images(0, 50, []);
$latestimages_urllist = [];
$latest_image = null;
foreach ($latestimages as $arrayid => $image) {
// create url from image id's
$latestimages_urllist[$arrayid] = "post/view/$image->id";
$latest_image = $image;
}
$this->add_sitemap_queue($latestimages_urllist, "monthly", "0.8", date("Y-m-d", strtotime($latest_image->posted)));
/* --- Add other tags --- */
$other_tags = $database->get_all("SELECT tag, count FROM tags ORDER BY `count` DESC LIMIT 21,10000000");
foreach ($other_tags as $arrayid => $tag) {
$tag = $tag['tag'];
// create url from tags (tagme ignored)
if ($tag != "tagme") {
$other_tags[$arrayid] = "post/list/$tag/";
}
}
$this->add_sitemap_queue($other_tags, "monthly", "0.7" /* not sure how to deal with date here */);
/* --- Add all other images to sitemap with lower priority --- */
$otherimages = Image::find_images(51, 10000000, []);
$image = null;
foreach ($otherimages as $arrayid => $image) {
// create url from image id's
$otherimages[$arrayid] = "post/view/$image->id";
}
assert(!is_null($image));
$this->add_sitemap_queue($otherimages, "monthly", "0.6", date("Y-m-d", strtotime($image->posted)));
/* --- Display page --- */
// when sitemap is ok, display it from the file
$this->generate_display_sitemap();
}
/**
* Adds an array of urls to the sitemap with the given information.
*/
private function add_sitemap_queue(
array $urls,
string $changefreq = "monthly",
string $priority = "0.5",
string $date = "2013-02-01"
) {
foreach ($urls as $url) {
$link = make_http(make_link("$url"));
$this->sitemap_queue .= "
$link
$date
$changefreq
$priority
";
}
}
// sets sitemap with entries in sitemap_queue
private function generate_display_sitemap()
{
global $page;
$xml = "<" . "?xml version=\"1.0\" encoding=\"utf-8\"?" . ">
$this->sitemap_queue
";
// Generate new sitemap
file_put_contents($this->sitemap_filepath, $xml);
$page->set_mode(PageMode::DATA);
$page->set_type("application/xml");
$page->set_data($xml);
}
/**
* Returns true if a new sitemap is needed.
*/
private function new_sitemap_needed(): bool
{
if (!file_exists($this->sitemap_filepath)) {
return true;
}
$sitemap_generation_interval = 86400; // allow new site map every day
$last_generated_time = filemtime($this->sitemap_filepath);
// if file doesn't exist, return true
if ($last_generated_time == false) {
return true;
}
// if it's been a day since last sitemap creation, return true
if ($last_generated_time + $sitemap_generation_interval < time()) {
return true;
} else {
return false;
}
}
private function display_existing_sitemap()
{
global $page;
$xml = file_get_contents($this->sitemap_filepath);
$page->set_mode(PageMode::DATA);
$page->set_type("application/xml");
$page->set_data($xml);
}
}