/**
* Constructor.
*
* @param string $html
* @param array $rules
*/
public function __construct($html, array $rules)
{
$this->rules = $rules;
$this->dom = XmlParser::getHtmlDocument('<?xml version="1.0" encoding="UTF-8">' . $html);
$this->xpath = new DOMXPath($this->dom);
}
/**
* Detect the feed format
*
* @access public
* @param string $content Feed content
* @return string
*/
public function detectFormat($content)
{
$dom = XmlParser::getHtmlDocument($content);
$xpath = new DOMXPath($dom);
foreach ($this->formats as $parser_name => $query) {
$nodes = $xpath->query($query);
if ($nodes->length === 1) {
return $parser_name;
}
}
return '';
}
/**
* Get the relevant content with the list of potential attributes
*
* @access public
*/
public function parseContentWithCandidates()
{
$dom = XmlParser::getHtmlDocument('<?xml version="1.0" encoding="UTF-8">' . $this->html);
$xpath = new DOMXPath($dom);
// Try to lookup in each tag
foreach ($this->candidatesAttributes as $candidate) {
Logger::setMessage(get_called_class() . ': Try this candidate: "' . $candidate . '"');
$nodes = $xpath->query('//*[(contains(@class, "' . $candidate . '") or @id="' . $candidate . '") and not (contains(@class, "nav") or contains(@class, "page"))]');
if ($nodes !== false && $nodes->length > 0) {
$this->content = $dom->saveXML($nodes->item(0));
Logger::setMessage(get_called_class() . ': Find candidate "' . $candidate . '" (' . strlen($this->content) . ' bytes)');
break;
}
}
// Try to fetch <article/>
if (strlen($this->content) < 200) {
$nodes = $xpath->query('//article');
if ($nodes !== false && $nodes->length > 0) {
$this->content = $dom->saveXML($nodes->item(0));
Logger::setMessage(get_called_class() . ': Find <article/> tag (' . strlen($this->content) . ' bytes)');
}
}
// Get everything
if (strlen($this->content) < 50) {
$nodes = $xpath->query('//body');
if ($nodes !== false && $nodes->length > 0) {
Logger::setMessage(get_called_class() . ' No enought content fetched, get //body');
$this->content = $dom->saveXML($nodes->item(0));
}
}
Logger::setMessage(get_called_class() . ': Strip garbage');
$this->stripGarbage();
}
/**
* Extract the icon links from the HTML.
*
* @param string $html
* HTML
*
* @return array
*/
public function extract($html)
{
$icons = array();
if (empty($html)) {
return $icons;
}
$dom = XmlParser::getHtmlDocument($html);
$xpath = new DOMXpath($dom);
$elements = $xpath->query("//link[contains(@rel, 'icon') and not(contains(@rel, 'apple'))]");
for ($i = 0; $i < $elements->length; ++$i) {
$icons[] = $elements->item($i)->getAttribute('href');
}
return $icons;
}
public function testEmpty()
{
$this->assertFalse(XmlParser::getDomDocument(''));
$this->assertFalse(XmlParser::getSimpleXml(''));
$this->assertNotFalse(XmlParser::getHtmlDocument(''));
}
/**
* Extract the icon links from the HTML.
*
* @param string $html HTML
*
* @return array
*/
public function extract($html)
{
$icons = array();
if (empty($html)) {
return $icons;
}
$dom = XmlParser::getHtmlDocument($html);
$xpath = new DOMXpath($dom);
$elements = $xpath->query('//link[@rel="icon" or @rel="shortcut icon" or @rel="icon shortcut"]');
for ($i = 0; $i < $elements->length; ++$i) {
$icons[] = $elements->item($i)->getAttribute('href');
}
return $icons;
}
