Add container factory and initialize container in Initializer

[MAILPOET-1605]

lib/Config/Initializer.php

@@ -4,6 +4,7 @@ namespace MailPoet\Config;
 
 use MailPoet\API;
 use MailPoet\Cron\CronTrigger;
+use MailPoet\DI\ContainerFactory;
 use MailPoet\Models\Setting;
 use MailPoet\Router;
 use MailPoet\Util\ConflictResolver;
@@ -18,6 +19,7 @@ require_once(ABSPATH . 'wp-admin/includes/plugin.php');
 class Initializer {
   private $access_control;
   private $renderer;
+  private $container;
 
   const INITIALIZED = 'MAILPOET_INITIALIZED';
 
@@ -50,6 +52,8 @@ class Initializer {
       ));
     }
 
+    $this->compileContainer();
+
     // activation function
     register_activation_hook(
       Env::$file,
@@ -170,7 +174,7 @@ class Initializer {
   }
 
   function setupAccessControl() {
-    $this->access_control = new AccessControl();
+    $this->access_control = $this->container->get(AccessControl::class);
   }
 
   function setupInstaller() {

lib/DI/ContainerFactory.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace MailPoet\DI;
+
+use MailPoet\Dependencies\Symfony\Component\Config\FileLocator;
+use MailPoet\Dependencies\Symfony\Component\DependencyInjection\ContainerBuilder;
+use MailPoet\Dependencies\Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
+
+class ContainerFactory {
+
+  /** @var ContainerBuilder */
+  private static $container;
+
+  static function getContainer() {
+    if (!self::$container) {
+      self::createContainer();
+    }
+    return self::$container;
+  }
+
+  private static function createContainer() {
+    self::$container = new ContainerBuilder();
+    $loader = new YamlFileLoader(self::$container, new FileLocator(__DIR__));
+    $loader->load('services.yml');
+  }
+}

lib/DI/services.yml

@@ -0,0 +1,5 @@
+parameters:
+
+services:
+  _defaults:
+    autowire: true