diff options
Diffstat (limited to 'classes/feedparser.php')
| -rw-r--r-- | classes/feedparser.php | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/classes/feedparser.php b/classes/feedparser.php new file mode 100644 index 000000000..d60db8a28 --- /dev/null +++ b/classes/feedparser.php @@ -0,0 +1,180 @@ +<?php +class FeedParser { + private $doc; + private $error; + private $items; + private $link; + private $title; + private $type; + private $xpath; + + const FEED_RDF = 0; + const FEED_RSS = 1; + const FEED_ATOM = 2; + + function __construct($data) { + libxml_use_internal_errors(true); + libxml_clear_errors(); + $this->doc = new DOMDocument(); + $this->doc->loadXML($data); + $this->error = $this->format_error(libxml_get_last_error()); + libxml_clear_errors(); + + $this->items = array(); + } + + function init() { + $root = $this->doc->firstChild; + $xpath = new DOMXPath($this->doc); + $xpath->registerNamespace('atom', 'http://www.w3.org/2005/Atom'); + $xpath->registerNamespace('media', 'http://search.yahoo.com/mrss/'); + $xpath->registerNamespace('rdf', 'http://www.w3.org/1999/02/22-rdf-syntax-ns#'); + $xpath->registerNamespace('slash', 'http://purl.org/rss/1.0/modules/slash/'); + $xpath->registerNamespace('dc', 'http://purl.org/dc/elements/1.1/'); + $xpath->registerNamespace('content', 'http://purl.org/rss/1.0/modules/content/'); + + $this->xpath = $xpath; + + $root = $xpath->query("(//atom:feed|//channel|//rdf:rdf|//rdf:RDF)")->item(0); + + if ($root) { + switch (mb_strtolower($root->tagName)) { + case "rdf:rdf": + $this->type = $this::FEED_RDF; + break; + case "channel": + $this->type = $this::FEED_RSS; + break; + case "feed": + $this->type = $this::FEED_ATOM; + break; + default: + $this->error = "Unknown/unsupported feed type"; + return; + } + + switch ($this->type) { + case $this::FEED_ATOM: + + $title = $xpath->query("//atom:feed/atom:title")->item(0); + + if ($title) { + $this->title = $title->nodeValue; + } + + $link = $xpath->query("//atom:feed/atom:link[not(@rel)]")->item(0); + + if ($link && $link->hasAttributes()) { + $this->link = $link->getAttribute("href"); + } + + $articles = $xpath->query("//atom:entry"); + + foreach ($articles as $article) { + array_push($this->items, new FeedItem_Atom($article, $this->doc, $this->xpath)); + } + + break; + case $this::FEED_RSS: + + $title = $xpath->query("//channel/title")->item(0); + + if ($title) { + $this->title = $title->nodeValue; + } + + $link = $xpath->query("//channel/link")->item(0); + + if ($link && $link->hasAttributes()) { + $this->link = $link->getAttribute("href"); + } + + $articles = $xpath->query("//channel/item"); + + foreach ($articles as $article) { + array_push($this->items, new FeedItem_RSS($article, $this->doc, $this->xpath)); + } + + break; + case $this::FEED_RDF: + $xpath->registerNamespace('rssfake', 'http://purl.org/rss/1.0/'); + + $title = $xpath->query("//rssfake:channel/rssfake:title")->item(0); + + if ($title) { + $this->title = $title->nodeValue; + } + + $link = $xpath->query("//rssfake:channel/rssfake:link")->item(0); + + if ($link) { + $this->link = $link->nodeValue; + } + + $articles = $xpath->query("//rssfake:item"); + + foreach ($articles as $article) { + array_push($this->items, new FeedItem_RSS($article, $this->doc, $this->xpath)); + } + + break; + + } + } else { + $this->error = "Unknown/unsupported feed type"; + return; + } + } + + function format_error($error) { + if ($error) { + return sprintf("LibXML error %s at line %d (column %d): %s", + $error->code, $error->line, $error->column, + $error->message); + } else { + return ""; + } + } + + function error() { + return $this->error; + } + + function get_link() { + return $this->link; + } + + function get_title() { + return $this->title; + } + + function get_items() { + return $this->items; + } + + function get_links($rel) { + $rv = array(); + + switch ($this->type) { + case $this::FEED_ATOM: + $links = $this->xpath->query("//atom:feed/atom:link"); + + foreach ($links as $link) { + if (!$rel || $link->hasAttribute('rel') && $link->getAttribute('rel') == $rel) { + array_push($rv, $link->getAttribute('href')); + } + } + break; + case $this::FEED_RSS: + $links = $this->xpath->query("//channel/link"); + foreach ($links as $link) { + if (!$rel || $link->hasAttribute('rel') && $link->getAttribute('rel') == $rel) { + array_push($rv, $link->getAttribute('href')); + } + } + break; + } + + return $rv; + } +} ?> |