update Piwik to version 2.16 (fixes #91)

www/analytics/plugins/Monolog/Processor/SprintfProcessor.php

@@ -0,0 +1,42 @@
+<?php
+/**
+ * Piwik - free/libre analytics platform
+ *
+ * @link http://piwik.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ */
+
+namespace Piwik\Plugins\Monolog\Processor;
+
+/**
+ * Processes a log message using `sprintf()`.
+ */
+class SprintfProcessor
+{
+    public function __invoke(array $record)
+    {
+        $message = $record['message'];
+        $parameters = $record['context'];
+
+        if (is_string($message) && !empty($parameters) && strpos($message, '%') !== false) {
+            $parameters = $this->ensureParametersAreStrings($parameters);
+
+            $record['message'] = vsprintf($message, $parameters);
+        }
+
+        return $record;
+    }
+
+    private function ensureParametersAreStrings(array $parameters)
+    {
+        foreach ($parameters as &$param) {
+            if (is_array($param)) {
+                $param = json_encode($param);
+            } elseif (is_object($param)) {
+                $param = get_class($param);
+            }
+        }
+
+        return $parameters;
+    }
+}