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Further refinment to OPDS/RSS generation and also add Atom feeds

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This commit is contained in:
Alex Cabal 2022-06-23 15:03:52 -05:00
parent d75d847004
commit f9fd6c8a02
23 changed files with 733 additions and 859 deletions
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44
lib/RssFeed.php
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@ -2,8 +2,8 @@
class RssFeed extends Feed{
public $Description;
public function __construct(string $url, string $title, string $path, string $description, array $entries){
parent::__construct($url, $title, $path, $entries);
public function __construct(string $title, string $description, string $url, string $path, array $entries){
parent::__construct($title, $url, $path, $entries);
$this->Description = $description;
$this->Stylesheet = '/rss/style';
}
@ -17,4 +17,44 @@ class RssFeed extends Feed{
return $this->XmlString;
}
protected function HasChanged(string $path): bool{
// RSS doesn't have information about when an item was updated,
// only when it was first published. So, we approximate on whether the feed
// has changed by looking at the length of the enclosed file.
// This can sometimes be the same even if the file has changed, but most of the time
// it also changes.
if(!is_file($path)){
return true;
}
$currentEntries = [];
foreach($this->Entries as $entry){
$obj = new StdClass();
$obj->Size = (string)filesize(WEB_ROOT . $entry->EpubUrl);
$obj->Id = preg_replace('/^url:/ius', '', $entry->Identifier);
$currentEntries[] = $obj;
}
$oldEntries = [];
try{
$xml = new SimpleXMLElement(str_replace('xmlns=', 'ns=', file_get_contents($path)));
$xml->registerXPathNamespace('atom', 'http://www.w3.org/2005/Atom');
foreach($xml->xpath('/rss/channel/item') ?: [] as $entry){
$obj = new StdClass();
foreach($entry->xpath('enclosure') ?: [] as $enclosure){
$obj->Size = (string)$enclosure['length'];
}
$obj->Id = (string)$entry->guid;
$oldEntries[] = $obj;
}
}
catch(Exception $ex){
// Invalid XML
return true;
}
return $currentEntries != $oldEntries;
}
}