2.5.2: Reorganize upgrade path so that 2.5.2 contains the show art schema changes

* Also bump the system_version number to 2.5.2. This will be deprecated sooner or later...

airtime_mvc/application/controllers/UpgradeController.php

@@ -0,0 +1,78 @@
+<?php
+
+require_once("Upgrades.php");
+
+class UpgradeController extends Zend_Controller_Action
+{
+    public function indexAction()
+    {
+        $this->view->layout()->disableLayout();
+        $this->_helper->viewRenderer->setNoRender(true);
+        
+        if (!$this->verifyAuth()) {
+            return;
+        }
+
+        $upgraders = array();
+        array_push($upgraders, new AirtimeUpgrader252());
+        /* These upgrades do not apply to open source Airtime yet.
+        array_push($upgraders, new AirtimeUpgrader253());
+        array_push($upgraders, new AirtimeUpgrader254());
+        */
+        $didWePerformAnUpgrade = false;
+        try 
+        {
+            for ($i = 0; $i < count($upgraders); $i++)
+            {
+                $upgrader = $upgraders[$i];
+                if ($upgrader->checkIfUpgradeSupported())
+                {
+                	// pass __DIR__ to the upgrades, since __DIR__ returns parent dir of file, not executor
+                    $upgrader->upgrade(__DIR__); //This will throw an exception if the upgrade fails.
+                    $didWePerformAnUpgrade = true;
+                    $this->getResponse()
+                         ->setHttpResponseCode(200)
+                         ->appendBody("Upgrade to Airtime " . $upgrader->getNewVersion() . " OK<br>"); 
+                    $i = 0; //Start over, in case the upgrade handlers are not in ascending order.
+                }
+            }
+            
+            if (!$didWePerformAnUpgrade)
+            {
+                $this->getResponse()
+                	 ->setHttpResponseCode(200)
+                	 ->appendBody("No upgrade was performed. The current Airtime version is " . AirtimeUpgrader::getCurrentVersion() . ".<br>");
+            }
+        } 
+        catch (Exception $e) 
+        {
+            $this->getResponse()
+            	 ->setHttpResponseCode(400)
+           		 ->appendBody($e->getMessage());
+        }
+    }
+
+    private function verifyAuth()
+    {
+        //The API key is passed in via HTTP "basic authentication":
+        //http://en.wikipedia.org/wiki/Basic_access_authentication
+        
+        $CC_CONFIG = Config::getConfig();
+        
+        //Decode the API key that was passed to us in the HTTP request.
+        $authHeader = $this->getRequest()->getHeader("Authorization");
+
+        $encodedRequestApiKey = substr($authHeader, strlen("Basic "));
+        $encodedStoredApiKey = base64_encode($CC_CONFIG["apiKey"][0] . ":");
+
+        if ($encodedRequestApiKey !== $encodedStoredApiKey)
+        {
+            $this->getResponse()
+                 ->setHttpResponseCode(401)
+                 ->appendBody("Error: Incorrect API key.<br>");
+            return false;
+        }
+        return true;
+    }
+
+}

airtime_mvc/application/controllers/upgrade_sql/airtime_2.5.3/upgrade.sql

@@ -0,0 +1,6 @@
+DELETE FROM cc_pref WHERE keystr = 'system_version';
+INSERT INTO cc_pref (keystr, valstr) VALUES ('system_version', '2.5.3');
+
+ALTER TABLE cc_files DROP COLUMN state;
+ALTER TABLE cc_files ADD import_status integer default 1; -- Default is "pending"
+UPDATE cc_files SET import_status=0; -- Existing files are already "imported"

airtime_mvc/application/controllers/upgrade_sql/airtime_2.5.5/upgrade.sql

@@ -0,0 +1,5 @@
+DELETE FROM cc_pref WHERE keystr = 'system_version';
+INSERT INTO cc_pref (keystr, valstr) VALUES ('system_version', '2.5.5');
+
+ALTER TABLE cc_show ADD COLUMN image_path varchar(255) DEFAULT '';
+ALTER TABLE cc_show_instances ADD COLUMN description varchar(255) DEFAULT '';