update Piwik to version 2.16 (fixes #91)

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

@@ -0,0 +1,58 @@
+<?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;
+
+use Piwik\ErrorHandler;
+use Piwik\Log;
+
+/**
+ * Process a log record containing an exception to generate a textual message.
+ */
+class ExceptionToTextProcessor
+{
+    public function __invoke(array $record)
+    {
+        if (! $this->contextContainsException($record)) {
+            return $record;
+        }
+
+        /** @var \Exception $exception */
+        $exception = $record['context']['exception'];
+
+        $record['message'] = sprintf(
+            "%s(%d): %s\n%s",
+            $exception->getFile(),
+            $exception->getLine(),
+            $this->getMessage($exception),
+            $this->getStackTrace($exception)
+        );
+
+        return $record;
+    }
+
+    private function contextContainsException($record)
+    {
+        return isset($record['context']['exception'])
+            && $record['context']['exception'] instanceof \Exception;
+    }
+
+    private function getMessage(\Exception $exception)
+    {
+        if ($exception instanceof \ErrorException) {
+            return ErrorHandler::getErrNoString($exception->getSeverity()) . ' - ' . $exception->getMessage();
+        }
+
+        return $exception->getMessage();
+    }
+
+    private function getStackTrace(\Exception $exception)
+    {
+        return Log::$debugBacktraceForTests ?: $exception->getTraceAsString();
+    }
+}