145 lines
3 KiB
PHP
145 lines
3 KiB
PHP
<?php
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class FeedParser {
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private $doc;
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private $error;
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private $items;
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private $link;
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private $title;
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private $type;
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private $xpath;
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const FEED_RDF = 0;
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const FEED_RSS = 1;
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const FEED_ATOM = 2;
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function __construct($data) {
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libxml_use_internal_errors(true);
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libxml_clear_errors();
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$this->doc = new DOMDocument();
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$this->doc->loadXML($data);
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$this->error = $this->format_error(libxml_get_last_error());
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libxml_clear_errors();
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$this->items = array();
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}
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function init() {
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$root = $this->doc->firstChild;
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$xpath = new DOMXPath($this->doc);
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$xpath->registerNamespace('atom', 'http://www.w3.org/2005/Atom');
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$this->xpath = $xpath;
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$root = $xpath->query("(//atom:feed|//channel)")->item(0);
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if ($root) {
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switch ($root->tagName) {
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case "channel":
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$this->type = $this::FEED_RSS;
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break;
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case "feed":
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$this->type = $this::FEED_ATOM;
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break;
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default:
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$this->error = "Unknown/unsupported feed type";
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return;
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}
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switch ($this->type) {
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case $this::FEED_ATOM:
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$title = $xpath->query("//atom:feed/atom:title")->item(0);
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if ($title) {
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$this->title = $title->nodeValue;
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}
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$link = $xpath->query("//atom:feed/atom:link[not(@rel)]")->item(0);
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if ($link && $link->hasAttributes()) {
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$this->link = $link->getAttribute("href");
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}
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$articles = $xpath->query("//atom:entry");
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foreach ($articles as $article) {
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array_push($this->items, new FeedItem_Atom($article));
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}
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break;
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case $this::FEED_RSS:
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$title = $xpath->query("//channel/title")->item(0);
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if ($title) {
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$this->title = $title->nodeValue;
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}
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$link = $xpath->query("//channel/link")->item(0);
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if ($link && $link->hasAttributes()) {
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$this->link = $link->getAttribute("href");
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}
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$articles = $xpath->query("//channel/item");
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foreach ($articles as $article) {
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array_push($this->items, new FeedItem_RSS($article));
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}
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break;
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}
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}
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}
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function format_error($error) {
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if ($error) {
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return sprintf("LibXML error %s at line %d (column %d): %s",
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$error->code, $error->line, $error->column,
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$error->message);
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} else {
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return "";
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}
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}
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function error() {
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return $this->error;
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}
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function get_link() {
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return $this->link;
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}
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function get_title() {
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return $this->title;
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}
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function get_items() {
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return $this->items;
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}
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function get_links($rel) {
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$rv = array();
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switch ($this->type) {
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case $this::FEED_ATOM:
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$links = $this->xpath->query("//atom:feed/atom:link");
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foreach ($links as $link) {
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if (!$rel || $link->hasAttribute('rel') && $link->getAttribute('rel') == $rel) {
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array_push($rv, $link->getAttribute('href'));
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}
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}
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break;
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case $this::FEED_RSS:
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$links = $this->xpath->query("//channel/link");
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foreach ($links as $link) {
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if (!$rel || $link->hasAttribute('rel') && $link->getAttribute('rel') == $rel) {
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array_push($rv, $link->getAttribute('href'));
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}
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}
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break;
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}
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return $rv;
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}
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} ?>
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