colorize support for logging

src/Infrastructure/Logger/Handlers/StdOut/StdOutFormatter.php

@@ -0,0 +1,91 @@
+<?php
+
+/**
+ * PHP Service Bus (publish-subscribe pattern implementation).
+ *
+ * @author  Maksim Masiukevich <dev@async-php.com>
+ * @license MIT
+ * @license https://opensource.org/licenses/MIT
+ */
+
+declare(strict_types = 1);
+
+namespace ServiceBus\Infrastructure\Logger\Handlers\StdOut;
+
+use Monolog\Formatter\LineFormatter;
+use Psr\Log\LogLevel;
+use function Amp\Log\hasColorSupport;
+use function ServiceBus\Common\jsonEncode;
+
+/**
+ * @codeCoverageIgnore
+ */
+final class StdOutFormatter extends LineFormatter
+{
+    /** @var bool */
+    private $colorize;
+
+    public function __construct()
+    {
+        parent::__construct("[%datetime%] %channel%.%level_name%: %message% %context% %extra%\r\n");
+
+        $this->colorize = hasColorSupport();
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function format(array $record): string
+    {
+        if ($this->colorize === true)
+        {
+            $record['level_name'] = $this->ansifyLevel($record['level_name']);
+            $record['channel']    = "\033[1m{$record['channel']}\033[0m";
+        }
+
+        return parent::format($record);
+    }
+
+    /**
+     * @inheritDoc
+     */
+    protected function toJson($data, bool $ignoreErrors = false): string
+    {
+        if (\is_array($data) === true)
+        {
+            return jsonEncode($data);
+        }
+
+        return '';
+    }
+
+    private function ansifyLevel(string $level): string
+    {
+        $level = \strtolower($level);
+
+        switch ($level)
+        {
+            case LogLevel::EMERGENCY:
+            case LogLevel::ALERT:
+            case LogLevel::CRITICAL:
+            case LogLevel::ERROR:
+                /** bold + red */
+                return "\033[1;31m{$level}\033[0m";
+            case LogLevel::WARNING:
+                /** bold + yellow */
+                return "\033[1;33m{$level}\033[0m";
+            case LogLevel::NOTICE:
+                /** bold + green */
+                return "\033[1;32m{$level}\033[0m";
+            case LogLevel::INFO:
+                /** bold + magenta */
+                return "\033[1;35m{$level}\033[0m";
+            case LogLevel::DEBUG:
+                /** bold + cyan */
+                return "\033[1;36m{$level}\033[0m";
+            default:
+                /** bold */
+                return "\033[1m{$level}\033[0m";
+        }
+    }
+}

src/Infrastructure/Logger/Handlers/StdOut/StdOutHandler.php

@@ -14,10 +14,8 @@
 
 use Amp\ByteStream\ResourceOutputStream;
 use Monolog\Formatter\FormatterInterface;
-use Monolog\Formatter\LineFormatter;
 use Monolog\Handler\AbstractProcessingHandler;
 use Monolog\Logger;
-use function ServiceBus\Common\jsonEncode;
 
 /**
  * Console output handler.
@@ -33,24 +31,7 @@ public function __construct(int $level = Logger::DEBUG, bool $bubble = true, ?Fo
     {
         parent::__construct($level, $bubble);
 
-        $this->formatter = $formatter
-            ?: new class() extends LineFormatter
-            {
-                public function __construct()
-                {
-                    parent::__construct("[%datetime%] %channel%.%level_name%: %message% %context% %extra%\r\n");
-                }
-
-                protected function toJson($data, bool $ignoreErrors = false): string
-                {
-                    if (\is_array($data) === true)
-                    {
-                        return jsonEncode($data);
-                    }
-
-                    return '';
-                }
-            };
+        $this->formatter = $formatter ?? new StdOutFormatter();
 
         $this->streamWriter = new ResourceOutputStream(\STDOUT, 50000);
     }