More work on setup/installation process

airtime_mvc/public/setup/setup-functions.php

@@ -0,0 +1,45 @@
+<?php
+
+/**
+ * Class Setup
+ *
+ * Abstract superclass for the setup and installation process
+ */
+abstract class Setup {
+
+    abstract function __construct($settings);
+
+    abstract function runSetup();
+
+    /**
+     * Generates a random string.
+     *
+     * @param integer $p_len length of the output string
+     * @param string $p_chars characters to use in the output string
+     * @return string the generated random string
+     */
+    protected function generateRandomString($p_len=20, $p_chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789')
+    {
+        $string = '';
+        for ($i = 0; $i < $p_len; $i++)
+        {
+            $pos = mt_rand(0, strlen($p_chars)-1);
+            $string .= $p_chars{$pos};
+        }
+        return $string;
+    }
+
+}
+
+require_once('database-setup.php');
+require_once('rabbitmq-setup.php');
+
+// If airtime.conf exists, we shouldn't be here
+if (!file_exists(dirname(dirname(__DIR__)) . '/build/airtime.conf')) {
+    if (isset($_GET["obj"]) && $objType = $_GET["obj"]) {
+        $obj = new $objType($_POST);
+        if ($obj instanceof Setup) {
+            echo json_encode($obj->runSetup());
+        }
+    }
+}