1 files changed, 209 insertions, 0 deletions
diff --git a/vendor/fguillot/picofeed/lib/PicoFeed/Reader/Favicon.php b/vendor/fguillot/picofeed/lib/PicoFeed/Reader/Favicon.php
new file mode 100644
index 000000000..f762c56b2
--- /dev/null
+++ b/vendor/fguillot/picofeed/lib/PicoFeed/Reader/Favicon.php
@@ -0,0 +1,209 @@
+<?php
+
+namespace PicoFeed\Reader;
+
+use DOMXpath;
+
+use PicoFeed\Client\Client;
+use PicoFeed\Client\ClientException;
+use PicoFeed\Client\Url;
+use PicoFeed\Config\Config;
+use PicoFeed\Logging\Logger;
+use PicoFeed\Parser\XmlParser;
+
+/**
+ * Favicon class
+ *
+ * https://en.wikipedia.org/wiki/Favicon
+ *
+ * @author  Frederic Guillot
+ * @package Reader
+ */
+class Favicon
+{
+    /**
+     * Config class instance
+     *
+     * @access private
+     * @var \PicoFeed\Config\Config
+     */
+    private $config;
+
+    /**
+     * Icon binary content
+     *
+     * @access private
+     * @var string
+     */
+    private $content = '';
+
+    /**
+     * Icon content type
+     *
+     * @access private
+     * @var string
+     */
+    private $content_type = '';
+
+    /**
+     * Constructor
+     *
+     * @access public
+     * @param  \PicoFeed\Config\Config   $config   Config class instance
+     */
+    public function __construct(Config $config = null)
+    {
+        $this->config = $config ?: new Config;
+    }
+
+    /**
+     * Get the icon file content (available only after the download)
+     *
+     * @access public
+     * @return string
+     */
+    public function getContent()
+    {
+        return $this->content;
+    }
+
+    /**
+     * Get the icon file type (available only after the download)
+     *
+     * @access public
+     * @return string
+     */
+    public function getType()
+    {
+        return $this->content_type;
+    }
+
+    /**
+     * Get data URI (http://en.wikipedia.org/wiki/Data_URI_scheme)
+     *
+     * @access public
+     * @return string
+     */
+    public function getDataUri()
+    {
+        return sprintf(
+            'data:%s;base64,%s',
+            $this->content_type,
+            base64_encode($this->content)
+        );
+    }
+
+    /**
+     * Download and check if a resource exists
+     *
+     * @access public
+     * @param  string               $url    URL
+     * @return \PicoFeed\Client             Client instance
+     */
+    public function download($url)
+    {
+        $client = Client::getInstance();
+        $client->setConfig($this->config);
+
+        Logger::setMessage(get_called_class().' Download => '.$url);
+
+        try {
+            $client->execute($url);
+        }
+        catch (ClientException $e) {
+            Logger::setMessage(get_called_class().' Download Failed => '.$e->getMessage());
+        }
+
+        return $client;
+    }
+
+    /**
+     * Check if a remote file exists
+     *
+     * @access public
+     * @param  string    $url    URL
+     * @return boolean
+     */
+    public function exists($url)
+    {
+        return $this->download($url)->getContent() !== '';
+    }
+
+    /**
+     * Get the icon link for a website
+     *
+     * @access public
+     * @param  string    $website_link    URL
+     * @return string
+     */
+    public function find($website_link)
+    {
+        $website = new Url($website_link);
+
+        $icons = $this->extract($this->download($website->getBaseUrl('/'))->getContent());
+        $icons[] = $website->getBaseUrl('/favicon.ico');
+
+        foreach ($icons as $icon_link) {
+
+            $icon_link = $this->convertLink($website, new Url($icon_link));
+            $resource = $this->download($icon_link);
+            $this->content = $resource->getContent();
+            $this->content_type = $resource->getContentType();
+
+            if ($this->content !== '') {
+                return $icon_link;
+            }
+        }
+
+        return '';
+    }
+
+    /**
+     * Convert icon links to absolute url
+     *
+     * @access public
+     * @param  \PicoFeed\Client\Url      $website     Website url
+     * @param  \PicoFeed\Client\Url      $icon        Icon url
+     * @return string
+     */
+    public function convertLink(Url $website, Url $icon)
+    {
+        $base_url = '';
+
+        if ($icon->isRelativeUrl()) {
+            $base_url = $website->getBaseUrl();
+        }
+        else if ($icon->isProtocolRelative()) {
+            $icon->setScheme($website->getScheme());
+        }
+
+        return $icon->getAbsoluteUrl($base_url);
+    }
+
+    /**
+     * Extract the icon links from the HTML
+     *
+     * @access public
+     * @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;
+    }
+}