Add isHandling, fixes #53

CHANGELOG.mdown

@@ -1,3 +1,10 @@
+* 1.0.3 (2012--)
+
+  Changes:
+
+    * Added Monolog\Logger::isHandling() to check if a handler will
+      handle the given log level
+
 * 1.0.2 (2011-10-24)
 
   Changes:

src/Monolog/Logger.php

@@ -278,6 +278,33 @@ class Logger
         return self::$levels[$level];
     }
 
+    /**
+     * Checks whether the Logger as a handler that listens on the given level
+     *
+     * @param integer $level
+     * @return Boolean
+     */
+    public function isHandling($level)
+    {
+        $record = array(
+            'message' => '',
+            'context' => array(),
+            'level' => $level,
+            'level_name' => self::getLevelName($level),
+            'channel' => $this->name,
+            'datetime' => new \DateTime(),
+            'extra' => array(),
+        );
+
+        foreach ($this->handlers as $key => $handler) {
+            if ($handler->isHandling($record)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
     // ZF Logger Compat
 
     /**

tests/Monolog/LoggerTest.php

@@ -289,6 +289,32 @@ class LoggerTest extends \PHPUnit_Framework_TestCase
         $logger->debug('test');
     }
 
+    /**
+     * @covers Monolog\Logger::isHandling
+     */
+    public function testIsHandling()
+    {
+        $logger = new Logger(__METHOD__);
+
+        $handler1 = $this->getMock('Monolog\Handler\HandlerInterface');
+        $handler1->expects($this->any())
+            ->method('isHandling')
+            ->will($this->returnValue(false))
+        ;
+
+        $logger->pushHandler($handler1);
+        $this->assertFalse($logger->isHandling(Logger::DEBUG));
+
+        $handler2 = $this->getMock('Monolog\Handler\HandlerInterface');
+        $handler2->expects($this->any())
+            ->method('isHandling')
+            ->will($this->returnValue(true))
+        ;
+
+        $logger->pushHandler($handler2);
+        $this->assertTrue($logger->isHandling(Logger::DEBUG));
+    }
+
     /**
      * @dataProvider logMethodProvider
      * @covers Monolog\Logger::addDebug