Add support for phancap website thumbnailer.

Drop support for artviper, since their service is gone.

4 files changed, 204 insertions, 1 deletions

diff --git a/src/SemanticScuttle/Service.php b/src/SemanticScuttle/Service.php
index 1afb353..cd79f2c 100644
--- a/src/SemanticScuttle/Service.php
+++ b/src/SemanticScuttle/Service.php
@@ -51,7 +51,7 @@ class SemanticScuttle_Service
     {
 		static $instance;
 		if (!isset($instance)) {
-            $instance = new self($db);
+            $instance = new static($db);
         }
 		return $instance;
 	}
diff --git a/src/SemanticScuttle/Service/Thumbnails.php b/src/SemanticScuttle/Service/Thumbnails.php
new file mode 100644
index 0000000..6151254
--- /dev/null
+++ b/src/SemanticScuttle/Service/Thumbnails.php
@@ -0,0 +1,59 @@
+<?php
+/**
+ * SemanticScuttle - your social bookmark manager.
+ *
+ * PHP version 5.
+ *
+ * @category Bookmarking
+ * @package  SemanticScuttle
+ * @author   Christian Weiske <cweiske@cweiske.de>
+ * @license  GPL http://www.gnu.org/licenses/gpl.html
+ * @link     http://sourceforge.net/projects/semanticscuttle
+ */
+
+/**
+ * Instantiates the configured website thumbnailer object.
+ *
+ * @category Bookmarking
+ * @package  SemanticScuttle
+ * @author   Christian Weiske <cweiske@cweiske.de>
+ * @license  GPL http://www.gnu.org/licenses/gpl.html
+ * @link     http://sourceforge.net/projects/semanticscuttle
+ */
+class SemanticScuttle_Service_Thumbnails extends SemanticScuttle_Service
+{
+    /**
+     * Instantiates the configured website thumbnailer object.
+     *
+     * @return object Website thumbnailer
+     */
+    public function getThumbnailer()
+    {
+        if (!isset($GLOBALS['thumbnailsType'])
+            || $GLOBALS['thumbnailsType'] == ''
+        ) {
+            $class = 'SemanticScuttle_Thumbnailer_Null';
+        } else {
+            $class = 'SemanticScuttle_Thumbnailer_'
+                . ucfirst($GLOBALS['thumbnailsType']);
+        }
+        if (!class_exists($class)) {
+            //PEAR classname to filename rule
+            $file = str_replace('_', '/', $class) . '.php';
+            include_once $file;
+        }
+
+        $thumbnailer = new $class();
+
+        if (!isset($GLOBALS['thumbnailsConfig'])
+            || $GLOBALS['thumbnailsConfig'] == ''
+        ) {
+            $thumbnailer->setConfig(null);
+        } else {
+            $thumbnailer->setConfig($GLOBALS['thumbnailsConfig']);
+        }
+
+        return $thumbnailer;
+    }
+}
+?>
diff --git a/src/SemanticScuttle/Thumbnailer/Null.php b/src/SemanticScuttle/Thumbnailer/Null.php
new file mode 100644
index 0000000..ec12135
--- /dev/null
+++ b/src/SemanticScuttle/Thumbnailer/Null.php
@@ -0,0 +1,52 @@
+<?php
+/**
+ * SemanticScuttle - your social bookmark manager.
+ *
+ * PHP version 5.
+ *
+ * @category Bookmarking
+ * @package  SemanticScuttle
+ * @author   Christian Weiske <cweiske@cweiske.de>
+ * @license  GPL http://www.gnu.org/licenses/gpl.html
+ * @link     http://sourceforge.net/projects/semanticscuttle
+ */
+
+/**
+ * Dummy thumbnailer that never returns a thumbnail URL
+ *
+ * @category Bookmarking
+ * @package  SemanticScuttle
+ * @author   Christian Weiske <cweiske@cweiske.de>
+ * @license  GPL http://www.gnu.org/licenses/gpl.html
+ * @link     http://sourceforge.net/projects/semanticscuttle
+ */
+class SemanticScuttle_Thumbnailer_Null
+{
+    /**
+     * Set dummy configuration
+     *
+     * @param array $config Dummy configuration
+     *
+     * @return void
+     */
+    public function setConfig($config)
+    {
+    }
+
+    /**
+     * Get the URL for a website thumbnail.
+     * Always returns false.
+     *
+     * @param string  $bookmarkUrl URL of website to create thumbnail for
+     * @param integer $width       Screenshot width
+     * @param integer $height      Screenshot height
+     *
+     * @return mixed FALSE when no screenshot could be obtained,
+     *               string with the URL otherwise
+     */
+    public function getThumbnailUrl($bookmarkUrl, $width, $height)
+    {
+        return false;
+    }
+}
+?>
diff --git a/src/SemanticScuttle/Thumbnailer/Phancap.php b/src/SemanticScuttle/Thumbnailer/Phancap.php
new file mode 100644
index 0000000..1b76849
--- /dev/null
+++ b/src/SemanticScuttle/Thumbnailer/Phancap.php
@@ -0,0 +1,92 @@
+<?php
+/**
+ * SemanticScuttle - your social bookmark manager.
+ *
+ * PHP version 5.
+ *
+ * @category Bookmarking
+ * @package  SemanticScuttle
+ * @author   Christian Weiske <cweiske@cweiske.de>
+ * @license  GPL http://www.gnu.org/licenses/gpl.html
+ * @link     http://sourceforge.net/projects/semanticscuttle
+ */
+
+/**
+ * Show website thumbnails/screenshots using phancap
+ *
+ * @category Bookmarking
+ * @package  SemanticScuttle
+ * @author   Christian Weiske <cweiske@cweiske.de>
+ * @license  GPL http://www.gnu.org/licenses/gpl.html
+ * @link     http://sourceforge.net/projects/semanticscuttle
+ * @see      http://cweiske.de/phancap.htm
+ */
+class SemanticScuttle_Thumbnailer_Phancap
+{
+    /**
+     * Configuration array.
+     * Required keys:
+     * - url
+     * - token
+     * - secret
+     */
+    protected $config = array();
+
+    /**
+     * Set phancap configuration
+     *
+     * @param array $config Phancap configuration
+     *
+     * @return void
+     */
+    public function setConfig($config)
+    {
+        $this->config = $config;
+    }
+
+    /**
+     * Get the URL for a website thumbnail
+     *
+     * @param string  $bookmarkUrl URL of website to create thumbnail for
+     * @param integer $width       Screenshot width
+     * @param integer $height      Screenshot height
+     *
+     * @return mixed FALSE when no screenshot could be obtained,
+     *               string with the URL otherwise
+     */
+    public function getThumbnailUrl($bookmarkUrl, $width, $height)
+    {
+        //default parameters for the phancap service
+        $parameters = array(
+            'url'     => $bookmarkUrl,
+            'swidth'  => $width,
+            'sheight' => $height,
+            'sformat' => 'jpg',
+        );
+
+        if (isset($this->config['token']) && $this->config['token'] != '') {
+            $parameters['atoken']     = $this->config['token'];
+            $parameters['atimestamp'] = time();
+
+            //create signature
+            ksort($parameters);
+            foreach ($parameters as $key => $value) {
+                $encparams[] = $key . '=' . rawurlencode($value);
+            }
+            $encstring = implode('&', $encparams);
+            $signature = hash_hmac('sha1', $encstring, $this->config['secret']);
+            //append signature to parameters
+            $parameters['asignature'] = $signature;
+        }
+
+        //url-encode the parameters
+        $urlParams = array();
+        foreach ($parameters as $key => $value) {
+            $urlParams[] = $key . '=' . urlencode($value);
+        }
+
+        //final URL
+        return $this->config['url'] . '?' . implode('&', $urlParams);
+    }
+}
+?>