cleaned up gpio and device code, implemented dummy/dry run mode

lib/GpioWatcher.php

@@ -0,0 +1,71 @@
+<?php
+
+/*
+ * Copyright (C) 2014, NoccyLabs
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+namespace NoccyLabs\Gpio;
+
+use NoccyLabs\Gpio\Exception\HardwareException;
+
+/**
+ * Watch GPIO for interrupts (hardware or software)
+ *
+ *
+ *
+ */
+class GpioWatcher 
+{
+    protected $fd_gpio = array();
+    protected $fd_pins = array();
+    
+    public function refresh()
+    {
+        $read = $this->fd_gpio;
+        $write = array();
+        $except = $read;
+        if (count($read)>0) {
+            stream_select($read, $write, $except, 0);
+            foreach($except as $fd) {
+                $pin = $this->getPinFromFd($fd);
+                $pin->doInterrupt();
+            
+            }
+        }
+    }
+    
+    public function getPinFromFd($fd)
+    {
+        foreach($this->fd_pins as $pinfd=>$pin) {
+            if ($pinfd == $fd) { return $pin; }
+        }
+        return false;
+    }
+    
+    public function enableInterrupt(GpioPin $pin, $fd)
+    {
+        $this->fd_gpio[] = $fd;
+        
+        $this->fd_pins[$fd] = $pin;
+        
+    }
+    
+    public function disableInterrupt(GpioPin $pin)
+    {
+    }
+    
+   
+}