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lib/pkp/classes/core/AppServiceProvider.php

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+<?php
+
+/**
+ * @file classes/core/AppServiceProvider.php
+ *
+ * Copyright (c) 2014-2021 Simon Fraser University
+ * Copyright (c) 2000-2021 John Willinsky
+ * Distributed under the GNU GPL v3. For full terms see the file docs/COPYING.
+ *
+ * @class AppServiceProvider
+ *
+ * @ingroup core
+ *
+ * @brief Resolves requests for application classes such as the request handler
+ *   to support dependency injection
+ */
+
+namespace PKP\core;
+
+use APP\core\Application;
+use APP\core\Services;
+use Illuminate\Support\ServiceProvider;
+use PKP\context\Context;
+use PKP\services\PKPSchemaService;
+
+class AppServiceProvider extends ServiceProvider
+{
+    /**
+     * Register application services
+     *
+     * Services registered on the app container here can be automatically
+     * injected as dependencies to classes that are instantiated by the
+     * app container.
+     *
+     * @see https://laravel.com/docs/8.x/container#automatic-injection
+     * @see https://laravel.com/docs/8.x/providers#the-register-method
+     */
+    public function register()
+    {
+        $this->app->singleton('maps', function ($app) {
+            return new MapContainer();
+        });
+        $this->app->singleton(PKPSchemaService::class, function ($app) {
+            return Services::get('schema');
+        });
+        $this->app->singleton(PKPRequest::class, function ($app) {
+            return Application::get()->getRequest();
+        });
+        $this->app->bind(Context::class, function ($app) {
+            return Application::get()->getRequest()->getContext();
+        });
+    }
+}