From 8a910fb2f4e413f8dd0786ddb04d1d244cbd9ae9 Mon Sep 17 00:00:00 2001
From: Thomas Steur <tsteur@users.noreply.github.com>
Date: Thu, 10 Sep 2015 09:50:02 +0200
Subject: Split multi-line log messages into multiple log messages if file
 handler is used

---
 plugins/Monolog/Formatter/LineMessageFormatter.php | 34 +++++++++++++++++-----
 plugins/Monolog/config/config.php                  |  5 +++-
 .../Unit/Formatter/LineMessageFormatterTest.php    | 28 ++++++++++++++++--
 3 files changed, 57 insertions(+), 10 deletions(-)

(limited to 'plugins/Monolog')

diff --git a/plugins/Monolog/Formatter/LineMessageFormatter.php b/plugins/Monolog/Formatter/LineMessageFormatter.php
index 6b81f2daec..8224ff71f6 100644
--- a/plugins/Monolog/Formatter/LineMessageFormatter.php
+++ b/plugins/Monolog/Formatter/LineMessageFormatter.php
@@ -23,12 +23,16 @@ class LineMessageFormatter implements FormatterInterface
      */
     private $logMessageFormat;
 
+    private $allowInlineLineBreaks;
+
     /**
      * @param string $logMessageFormat
+     * @param bool $allowInlineLineBreaks If disabled, a log message will be created for each line
      */
-    public function __construct($logMessageFormat)
+    public function __construct($logMessageFormat, $allowInlineLineBreaks = true)
     {
         $this->logMessageFormat = $logMessageFormat;
+        $this->allowInlineLineBreaks = $allowInlineLineBreaks;
     }
 
     public function format(array $record)
@@ -36,18 +40,34 @@ class LineMessageFormatter implements FormatterInterface
         $class = isset($record['extra']['class']) ? $record['extra']['class'] : '';
         $date = $record['datetime']->format('Y-m-d H:i:s');
 
-        $message = $this->prefixMessageWithRequestId($record);
+        $message = $record['message'];
+
+        if ($this->allowInlineLineBreaks) {
+            $message  = str_replace("\n", "\n  ", $message); // intend lines
+            $messages = array($message);
+        } else {
+            $messages = explode("\n", $message);
+        }
+
+        $total = '';
+
+        foreach ($messages as $message) {
+            $message = $this->prefixMessageWithRequestId($record, $message);
+            $total  .= $this->formatMessage($class, $message, $date, $record);
+        }
 
+        return $total;
+    }
+
+    private function formatMessage($class, $message, $date, $record)
+    {
         $message = str_replace(
             array('%tag%', '%message%', '%datetime%', '%level%'),
             array($class, $message, $date, $record['level_name']),
             $this->logMessageFormat
         );
 
-        $message = str_replace("\n", "\n  ", $message);
-
         $message .= "\n";
-
         return $message;
     }
 
@@ -60,11 +80,11 @@ class LineMessageFormatter implements FormatterInterface
         return $records;
     }
 
-    private function prefixMessageWithRequestId(array $record)
+    private function prefixMessageWithRequestId(array $record, $message)
     {
         $requestId = isset($record['extra']['request_id']) ? $record['extra']['request_id'] : '';
 
-        $message = trim($record['message']);
+        $message = trim($message);
 
         if ($requestId) {
             $message = '[' . $requestId . '] ' . $message;
diff --git a/plugins/Monolog/config/config.php b/plugins/Monolog/config/config.php
index 6a7fb0130f..95463b91de 100644
--- a/plugins/Monolog/config/config.php
+++ b/plugins/Monolog/config/config.php
@@ -46,7 +46,10 @@ return array(
 
     'Piwik\Plugins\Monolog\Handler\FileHandler' => DI\object()
         ->constructor(DI\get('log.file.filename'), DI\get('log.level'))
-        ->method('setFormatter', DI\get('Piwik\Plugins\Monolog\Formatter\LineMessageFormatter')),
+        ->method('setFormatter', DI\get('log.lineMessageFormatter.file')),
+
+    'log.lineMessageFormatter.file' => DI\object('Piwik\Plugins\Monolog\Formatter\LineMessageFormatter')
+        ->constructorParameter('allowInlineLineBreaks', false),
 
     'Piwik\Plugins\Monolog\Handler\DatabaseHandler' => DI\object()
         ->constructor(DI\get('log.level'))
diff --git a/plugins/Monolog/tests/Unit/Formatter/LineMessageFormatterTest.php b/plugins/Monolog/tests/Unit/Formatter/LineMessageFormatterTest.php
index eac798e9c7..c98182e357 100644
--- a/plugins/Monolog/tests/Unit/Formatter/LineMessageFormatterTest.php
+++ b/plugins/Monolog/tests/Unit/Formatter/LineMessageFormatterTest.php
@@ -64,7 +64,7 @@ class LineMessageFormatterTest extends \PHPUnit_Framework_TestCase
      */
     public function it_should_indent_multiline_message()
     {
-        $formatter = new LineMessageFormatter('%message%');
+        $formatter = new LineMessageFormatter('%level% %message%');
 
         $record = array(
             'message'    => "Hello world\ntest\ntest",
@@ -73,10 +73,34 @@ class LineMessageFormatterTest extends \PHPUnit_Framework_TestCase
         );
 
         $formatted = <<<LOG
-Hello world
+ERROR Hello world
   test
   test
 
+LOG;
+
+        $this->assertEquals($formatted, $formatter->format($record));
+    }
+
+    /**
+     * @test
+     */
+    public function it_should_split_inline_line_breaks_into_many_messages_if_disabled()
+    {
+        $formatter = new LineMessageFormatter('%level% %message%', $allowInlineLineBreaks = false);
+
+        $record = array(
+            'message'    => "Hello world\ntest\ntest",
+            'datetime'   => DateTime::createFromFormat('U', 0),
+            'level_name' => 'ERROR',
+            'extra'      => array('request_id' => '1234')
+        );
+
+        $formatted = <<<LOG
+ERROR [1234] Hello world
+ERROR [1234] test
+ERROR [1234] test
+
 LOG;
 
         $this->assertEquals($formatted, $formatter->format($record));
-- 
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