Got the basic migration framework working

install/ajax/process-migration.php

@@ -0,0 +1,37 @@
+<?php
+define('IN_SCRIPT', 1);
+define('HESK_PATH', '../../');
+
+spl_autoload_register(function ($class) {
+    // USED FOR MIGRATIONS
+    $file = HESK_PATH . 'install/migrations/' . str_replace('\\', '/', $class) . '.php';
+
+    if (file_exists($file)) {
+        require($file);
+    } else {
+        output(array("message" => "{$file} not found!", 500));
+    }
+});
+
+require(HESK_PATH . 'install/migrations/core.php');
+
+$allMigrations = getAllMigrations();
+$json = file_get_contents('php://input');
+$request = json_decode($json, true);
+
+/* @var $migration AbstractMigration */
+$migration = $allMigrations[$request['migrationNumber']];
+
+if ($request['direction'] === 'up') {
+    $migration->up();
+} elseif ($request['direction'] === 'down') {
+    $migration->down();
+} else {
+    output(array("message" => "Invalid direction provided"), 400);
+}
+
+function output($data, $response = 200) {
+    http_response_code($response);
+    header('Content-Type: application/json');
+    print json_encode($data);
+}

install/migrations/AbstractMigration.php

@@ -0,0 +1,7 @@
+<?php
+
+abstract class AbstractMigration {
+    abstract function up();
+
+    abstract function down();
+}

install/migrations/Pre140/StatusesMigration.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace Pre140;
+
+use AbstractMigration;
+
+class StatusesMigration extends AbstractMigration {
+
+    function up() {
+        // TODO: Implement up() method.
+        die('up called');
+    }
+
+    function down() {
+        // TODO: Implement down() method.
+        die('down called');
+    }
+}

install/migrations/core.php

@@ -1,7 +1,9 @@
 <?php
 
+use Pre140\StatusesMigration;
+
 function getAllMigrations() {
     return array(
-        1 => null
+        1 => new StatusesMigration()
     );
 }