Implemented service provider functionality

config/app.php

@@ -0,0 +1,9 @@
+<?php
+
+// Application config
+
+return [
+    // Service providers
+    'providers' => [
+    ],
+];

includes/engelsystem_provider.php

@@ -26,6 +26,13 @@ require_once __DIR__ . '/autoload.php';
 $app = new Application(realpath(__DIR__ . DIRECTORY_SEPARATOR . '..'));
 
 
+/**
+ * Bootstrap application
+ */
+$appConfig = $app->make(Config::class);
+$appConfig->set(app('path.config') . '/app.php');
+$app->bootstrap($appConfig);
+
 /**
  * Load configuration
  */
@@ -40,6 +47,10 @@ if (file_exists(__DIR__ . '/../config/config.php')) {
     ));
 }
 
+
+/**
+ * Configure application
+ */
 date_default_timezone_set($config->get('timezone'));
 
 
@@ -55,7 +66,7 @@ $app->instance('request', $request);
 /**
  * Check for maintenance
  */
-if ($config->get('maintenance')) {
+if ($app->get('config')->get('maintenance')) {
     echo file_get_contents(__DIR__ . '/../templates/maintenance.html');
     die();
 }

includes/helper/internationalization_helper.php

@@ -36,7 +36,7 @@ function gettext_init()
     }
 
     gettext_locale();
-    bindtextdomain('default', realpath(__DIR__ . '/../../locale'));
+    bindtextdomain('default', app('path.lang'));
     bind_textdomain_codeset('default', 'UTF-8');
     textdomain('default');
 }

src/Application.php

@@ -2,7 +2,9 @@
 
 namespace Engelsystem;
 
+use Engelsystem\Config\Config;
 use Engelsystem\Container\Container;
+use Engelsystem\Container\ServiceProvider;
 use Psr\Container\ContainerInterface;
 
 class Application extends Container
@@ -10,6 +12,16 @@ class Application extends Container
     /** @var string|null */
     protected $appPath = null;
 
+    /** @var bool */
+    protected $isBootstrapped = false;
+
+    /**
+     * Registered service providers
+     *
+     * @var array
+     */
+    protected $serviceProviders = [];
+
     /**
      * Application constructor.
      *
@@ -36,15 +48,73 @@ class Application extends Container
     }
 
     /**
+     * @param string|ServiceProvider $provider
+     * @return ServiceProvider
+     */
+    public function register($provider)
+    {
+        if (is_string($provider)) {
+            $provider = $this->get($provider);
+        }
+
+        $this->serviceProviders[] = $provider;
+
+        $provider->register();
+
+        if ($this->isBootstrapped) {
+            $this->call([$provider, 'boot']);
+        }
+
+        return $provider;
+    }
+
+    /**
+     * Boot service providers
+     *
+     * @param Config|null $config
+     */
+    public function bootstrap(Config $config = null)
+    {
+        if ($this->isBootstrapped) {
+            return;
+        }
+
+        if ($config instanceof Config) {
+            foreach ($config->get('providers', []) as $provider) {
+                $this->register($provider);
+            }
+        }
+
+        foreach ($this->serviceProviders as $provider) {
+            $this->call([$provider, 'boot']);
+        }
+
+        $this->isBootstrapped = true;
+    }
+
+    protected function registerPaths()
+    {
+        $appPath = $this->appPath;
+
+        $this->instance('path', $appPath);
+        $this->instance('path.config', $appPath . DIRECTORY_SEPARATOR . 'config');
+        $this->instance('path.lang', $appPath . DIRECTORY_SEPARATOR . 'locale');
+    }
+
+    /**
+     * Set app base path
+     *
      * @param string $appPath
      * @return static
      */
     public function setAppPath($appPath)
     {
+        $appPath = realpath($appPath);
         $appPath = rtrim($appPath, DIRECTORY_SEPARATOR);
 
         $this->appPath = $appPath;
-        $this->instance('path', $appPath);
+
+        $this->registerPaths();
 
         return $this;
     }
@@ -56,4 +126,12 @@ class Application extends Container
     {
         return $this->appPath;
     }
+
+    /**
+     * @return bool
+     */
+    public function isBooted()
+    {
+        return $this->isBootstrapped;
+    }
 }

src/Container/ServiceProvider.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace Engelsystem\Container;
+
+use Engelsystem\Application;
+
+abstract class ServiceProvider
+{
+    /** @var Application */
+    protected $app;
+
+    /**
+     * ServiceProvider constructor.
+     *
+     * @param Application $app
+     */
+    public function __construct(Application $app)
+    {
+        $this->app = $app;
+    }
+
+    /**
+     * Register container bindings
+     */
+    public function register() { }
+
+    /**
+     * Called after other services had been registered
+     */
+    public function boot() { }
+}

src/helpers.php

@@ -23,6 +23,15 @@ function app($id = null)
     return Application::getInstance()->get($id);
 }
 
+/**
+ * @param string $path
+ * @return string
+ */
+function base_path($path = '')
+{
+    return app('path') . (empty($path) ? '' : DIRECTORY_SEPARATOR . $path);
+}
+
 /**
  * Get or set config values
  *
@@ -46,6 +55,15 @@ function config($key = null, $default = null)
     return $config->get($key, $default);
 }
 
+/**
+ * @param string $path
+ * @return string
+ */
+function config_path($path = '')
+{
+    return app('path.config') . (empty($path) ? '' : DIRECTORY_SEPARATOR . $path);
+}
+
 /**
  * @param string $key
  * @param mixed  $default
@@ -78,22 +96,6 @@ function session($key = null, $default = null)
     return $session->get($key, $default);
 }
 
-/**
- * @param string  $template
- * @param mixed[] $data
- * @return Renderer|string
- */
-function view($template = null, $data = null)
-{
-    $renderer = app('renderer');
-
-    if (is_null($template)) {
-        return $renderer;
-    }
-
-    return $renderer->render($template, $data);
-}
-
 /**
  * @param string $path
  * @param array  $parameters
@@ -109,3 +111,19 @@ function url($path = null, $parameters = [])
 
     return $urlGenerator->to($path, $parameters);
 }
+
+/**
+ * @param string  $template
+ * @param mixed[] $data
+ * @return Renderer|string
+ */
+function view($template = null, $data = null)
+{
+    $renderer = app('renderer');
+
+    if (is_null($template)) {
+        return $renderer;
+    }
+
+    return $renderer->render($template, $data);
+}

tests/Unit/ApplicationTest.php

@@ -3,19 +3,23 @@
 namespace Engelsystem\Test\Config;
 
 use Engelsystem\Application;
+use Engelsystem\Config\Config;
 use Engelsystem\Container\Container;
+use Engelsystem\Container\ServiceProvider;
 use PHPUnit\Framework\TestCase;
+use PHPUnit_Framework_MockObject_MockObject;
 use Psr\Container\ContainerInterface;
+use ReflectionClass;
 
 class ApplicationTest extends TestCase
 {
     /**
-     * @covers       \Engelsystem\Application::__construct
-     * @covers       \Engelsystem\Application::registerBaseBindings
+     * @covers \Engelsystem\Application::__construct
+     * @covers \Engelsystem\Application::registerBaseBindings
      */
     public function testConstructor()
     {
-        $app = new Application();
+        $app = new Application('.');
 
         $this->assertInstanceOf(Container::class, $app);
         $this->assertInstanceOf(ContainerInterface::class, $app);
@@ -27,4 +31,141 @@ class ApplicationTest extends TestCase
         $this->assertSame($app, Application::getInstance());
         $this->assertSame($app, Container::getInstance());
     }
+
+    /**
+     * @covers \Engelsystem\Application::setAppPath
+     * @covers \Engelsystem\Application::registerPaths
+     * @covers \Engelsystem\Application::path
+     */
+    public function testAppPath()
+    {
+        $app = new Application();
+
+        $this->assertFalse($app->has('path'));
+
+        $app->setAppPath('.');
+        $this->assertTrue($app->has('path'));
+        $this->assertTrue($app->has('path.config'));
+        $this->assertTrue($app->has('path.lang'));
+
+        $this->assertEquals(realpath('.'), $app->path());
+        $this->assertEquals(realpath('.') . '/config', $app->get('path.config'));
+
+        $app->setAppPath('./../');
+        $this->assertEquals(realpath('../') . '/config', $app->get('path.config'));
+    }
+
+    /**
+     * @covers \Engelsystem\Application::register
+     */
+    public function testRegister()
+    {
+        $app = new Application();
+
+        $serviceProvider = $this->mockServiceProvider($app, ['register']);
+        $serviceProvider->expects($this->once())
+            ->method('register');
+
+        $app->register($serviceProvider);
+
+        $anotherServiceProvider = $this->mockServiceProvider($app, ['register', 'boot']);
+        $anotherServiceProvider->expects($this->once())
+            ->method('register');
+        $anotherServiceProvider->expects($this->once())
+            ->method('boot');
+
+        $app->bootstrap();
+        $app->register($anotherServiceProvider);
+    }
+
+    /**
+     * @covers \Engelsystem\Application::register
+     */
+    public function testRegisterBoot()
+    {
+        $app = new Application();
+        $app->bootstrap();
+
+        $serviceProvider = $this->mockServiceProvider($app, ['register', 'boot']);
+        $serviceProvider->expects($this->once())
+            ->method('register');
+        $serviceProvider->expects($this->once())
+            ->method('boot');
+
+        $app->register($serviceProvider);
+    }
+
+    /**
+     * @covers \Engelsystem\Application::register
+     */
+    public function testRegisterClassName()
+    {
+        $app = new Application();
+
+        $mockClassName = $this->getMockClass(ServiceProvider::class);
+        $serviceProvider = $this->getMockBuilder($mockClassName)
+            ->setConstructorArgs([$app])
+            ->setMethods(['register'])
+            ->getMock();
+
+        $serviceProvider->expects($this->once())
+            ->method('register');
+
+        $app->instance($mockClassName, $serviceProvider);
+        $app->register($mockClassName);
+    }
+
+    /**
+     * @covers \Engelsystem\Application::bootstrap
+     * @covers \Engelsystem\Application::isBooted
+     */
+    public function testBootstrap()
+    {
+        /** @var PHPUnit_Framework_MockObject_MockObject|Application $app */
+        $app = $this->getMockBuilder(Application::class)
+            ->setMethods(['register'])
+            ->getMock();
+
+        $serviceProvider = $this->mockServiceProvider($app, ['boot']);
+        $serviceProvider->expects($this->once())
+            ->method('boot');
+
+        $app->expects($this->once())
+            ->method('register')
+            ->with($serviceProvider);
+
+        $config = $this->getMockBuilder(Config::class)
+            ->getMock();
+
+        $config->expects($this->once())
+            ->method('get')
+            ->with('providers')
+            ->willReturn([$serviceProvider]);
+
+        $property = (new ReflectionClass($app))->getProperty('serviceProviders');
+        $property->setAccessible(true);
+        $property->setValue($app, [$serviceProvider]);
+
+        $app->bootstrap($config);
+
+        $this->assertTrue($app->isBooted());
+
+        // Run bootstrap another time to ensure that providers are registered only once
+        $app->bootstrap($config);
+    }
+
+    /**
+     * @param Application $app
+     * @param array       $methods
+     * @return PHPUnit_Framework_MockObject_MockObject|ServiceProvider
+     */
+    protected function mockServiceProvider(Application $app, $methods = [])
+    {
+        $serviceProvider = $this->getMockBuilder(ServiceProvider::class)
+            ->setConstructorArgs([$app])
+            ->setMethods($methods)
+            ->getMockForAbstractClass();
+
+        return $serviceProvider;
+    }
 }