added counting observer

Author: Patrick Leckey

src/Intouch/LaravelNewrelic/Observers/NewrelicCountingObserver.php

@@ -0,0 +1,67 @@
+<?php
+/**
+ * Copyright (c)2015 In-Touch Insight Systems Inc.  All rights reserved.
+ *
+ * Date: 15-03-11
+ * Time: 8:55 AM
+ * 
+ * @author pleckey
+ * @project laravel-newrelic
+ */
+
+namespace Intouch\LaravelNewrelic\Observers;
+
+
+class NewrelicCountingObserver {
+
+	/**
+	 * Custom Metric name
+	 *
+	 * @var string|null
+	 */
+	protected $name;
+
+	/**
+	 * The list of observable events we care about
+	 *
+	 * @var array
+	 */
+	protected $care = [
+		'created',
+		'saved',
+		'deleted',
+		'updated',
+		'restored',
+	];
+
+	/**
+	 * @param null  $name
+	 * @param array $care
+	 */
+	public function __construct( $name = null, array $care = [] )
+	{
+		$this->name = $name;
+		$this->care = $care ?: $this->care;
+	}
+
+	/**
+	 * Handle the observable events we get passed
+	 *
+	 * @param string $event
+	 * @param array $args
+	 */
+	public function __call( $event, array $args )
+	{
+		// ignore it if we don't care about this event
+		if ( !in_array( $event, $this->care ) ) return;
+
+		$model = array_shift( $args );
+		$name = 'Custom/Counts/' . ltrim( $this->name ?: get_class($model), '/' ) . '/' . $event;
+
+		/**
+		 * NewRelic assumes custom metrics to be in milliseconds, so 4 gets interpreted as
+		 * .004.  So each "count" increment is 1000 to display properly in custom dashboards.
+		 */
+		\Newrelic::customMetric( $name, 1000 );
+	}
+}