1 files changed, 186 insertions, 0 deletions
diff --git a/vendor/miniflux/picofeed/lib/PicoFeed/Reader/Favicon.php b/vendor/miniflux/picofeed/lib/PicoFeed/Reader/Favicon.php
new file mode 100644
index 00000000..d4ca07db
--- /dev/null
+++ b/vendor/miniflux/picofeed/lib/PicoFeed/Reader/Favicon.php
@@ -0,0 +1,186 @@
+<?php
+
+namespace PicoFeed\Reader;
+
+use DOMXPath;
+use PicoFeed\Base;
+use PicoFeed\Client\Client;
+use PicoFeed\Client\ClientException;
+use PicoFeed\Client\Url;
+use PicoFeed\Logging\Logger;
+use PicoFeed\Parser\XmlParser;
+
+/**
+ * Favicon class.
+ *
+ * https://en.wikipedia.org/wiki/Favicon
+ *
+ * @author  Frederic Guillot
+ */
+class Favicon extends Base
+{
+    /**
+     * Valid types for favicon (supported by browsers).
+     *
+     * @var array
+     */
+    private $types = array(
+        'image/png',
+        'image/gif',
+        'image/x-icon',
+        'image/jpeg',
+        'image/jpg',
+        'image/svg+xml',
+    );
+
+    /**
+     * Icon binary content.
+     *
+     * @var string
+     */
+    private $content = '';
+
+    /**
+     * Icon content type.
+     *
+     * @var string
+     */
+    private $content_type = '';
+
+    /**
+     * Get the icon file content (available only after the download).
+     *
+     * @return string
+     */
+    public function getContent()
+    {
+        return $this->content;
+    }
+
+    /**
+     * Get the icon file type (available only after the download).
+     *
+     * @return string
+     */
+    public function getType()
+    {
+        foreach ($this->types as $type) {
+            if (strpos($this->content_type, $type) === 0) {
+                return $type;
+            }
+        }
+
+        return 'image/x-icon';
+    }
+
+    /**
+     * Get data URI (http://en.wikipedia.org/wiki/Data_URI_scheme).
+     *
+     * @return string
+     */
+    public function getDataUri()
+    {
+        if (empty($this->content)) {
+            return '';
+        }
+
+        return sprintf(
+            'data:%s;base64,%s',
+            $this->getType(),
+            base64_encode($this->content)
+        );
+    }
+
+    /**
+     * Download and check if a resource exists.
+     *
+     * @param string $url URL
+     * @return \PicoFeed\Client\Client Client instance
+     */
+    public function download($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.
+     *
+     * @param string $url URL
+     * @return bool
+     */
+    public function exists($url)
+    {
+        return $this->download($url)->getContent() !== '';
+    }
+
+    /**
+     * Get the icon link for a website.
+     *
+     * @param string $website_link URL
+     * @param string $favicon_link optional URL
+     * @return string
+     */
+    public function find($website_link, $favicon_link = '')
+    {
+        $website = new Url($website_link);
+
+        if ($favicon_link !== '') {
+            $icons = array($favicon_link);
+        } else {
+            $icons = $this->extract($this->download($website->getBaseUrl('/'))->getContent());
+            $icons[] = $website->getBaseUrl('/favicon.ico');
+        }
+
+        foreach ($icons as $icon_link) {
+            $icon_link = Url::resolve($icon_link, $website);
+            $resource = $this->download($icon_link);
+            $this->content = $resource->getContent();
+            $this->content_type = $resource->getContentType();
+
+            if ($this->content !== '') {
+                return $icon_link;
+            } elseif ($favicon_link !== '') {
+                return $this->find($website_link);
+            }
+        }
+
+        return '';
+    }
+
+    /**
+     * 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 = $xpath->query('//link[@rel="icon" or @rel="shortcut icon" or @rel="Shortcut Icon" or @rel="icon shortcut"]');
+
+        for ($i = 0; $i < $elements->length; ++$i) {
+            $icons[] = $elements->item($i)->getAttribute('href');
+        }
+
+        return $icons;
+    }
+}