Add helper methods for getting incident URLS ushahidi#857 ushahidi#853

These are used in the json controller and reports listing

application/models/incident.php

@@ -635,4 +635,36 @@ public function delete()
 		parent::delete();
 	}
 
+	/**
+	 * Get url of this incident
+	 * @return string
+	 **/
+	public function url()
+	{
+		return self::get_url($this);
+	}
+
+	/**
+	 * Get url for the incident object passed
+	 * @param object|int
+	 * @return string
+	 **/
+	public static function get_url($incident)
+	{
+		if (is_object($incident))
+		{
+			$id = isset($incident->incident_id) ? $incident->incident_id : $incident->id;
+		}
+		elseif (is_int($incident))
+		{
+			$id = intval($incident);
+		}
+		else
+		{
+			return false;
+		}
+
+		return url::site('reports/view/'.$id);
+	}
+
 }