add services && controller && first configuration tree builder

.gitignore

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+.idea/
+vendor/
+

BillingBundle/Controller/BillingController.php

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+<?php
+
+namespace Bluesquare\BillingBundle\Controller;
+
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+
+class BillingController extends AbstractController
+{
+    /**
+     * @Route("/bluesquare/billing-bundle/webhook", name="bluesquare.billing_bundle.webhook")
+    */
+    public function webhook()
+    {
+
+    }
+}

BillingBundle/DependencyInjection/BillingExtension.php

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+<?php
+
+namespace Bluesquare\BillingBundle\DependencyInjection;
+
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Extension\Extension;
+
+class BillingExtension extends Extension
+{
+    public function load(array $configs, ContainerBuilder $container)
+    {
+        $configuration = new Configuration();
+
+        $loader = new YamlFileLoader(
+            $container,
+            new FileLocator(__DIR__.'/../Resources/config')
+        );
+        $loader->load('services.yaml');
+
+        $this->addAnnotatedClassesToCompile([
+            'Bluesquare\\BillingBundle\\Controller\\'
+        ]);
+
+        $config = $this->processConfiguration($configuration, $configs);
+    }
+}

BillingBundle/DependencyInjection/Configuration.php

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+<?php
+
+namespace Acme\SocialBundle\DependencyInjection;
+
+use Symfony\Component\Config\Definition\Builder\TreeBuilder;
+use Symfony\Component\Config\Definition\ConfigurationInterface;
+
+class Configuration implements ConfigurationInterface
+{
+    public function getConfigTreeBuilder()
+    {
+        $treeBuilder = new TreeBuilder('billing');
+
+        $treeBuilder->getRootNode()->children()
+            ->arrayNode('stripe')->children()
+                ->scalarNode('stripe_api_key_pub')->end()
+                ->scalarNode('stripe_api_key')->end()
+                ->scalarNode('stripe_webhook_key')->end()
+            ->end()
+        ->end();
+
+
+        return $treeBuilder;
+    }
+}

BillingBundle/Resources/services.yaml

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+services:
+    # default configuration for services in *this* file
+    _defaults:
+    autowire: true      # Automatically injects dependencies in your services.
+    autoconfigure: true # Automatically registers your services as commands, event subscribers, etc.

BillingBundle/Service.php

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+<?php
+
+namespace Bluesquare\BillingBundle\Service;
+
+class PaymentSrv
+{
+
+}

BillingBundle/Service/BillingSrv.php

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+<?php
+
+namespace Bluesquare\BillingBundle\Service;
+
+class BillingSrv
+{
+    public function createPurchase($arr)
+    {
+
+    }
+}

composer.lock

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+{
+    "_readme": [
+        "This file locks the dependencies of your project to a known state",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
+        "This file is @generated automatically"
+    ],
+    "content-hash": "aa3de6bb3952a1418d15ede69ae18875",
+    "packages": [
+        {
+            "name": "doctrine/event-manager",
+            "version": "v1.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/doctrine/event-manager.git",
+                "reference": "a520bc093a0170feeb6b14e9d83f3a14452e64b3"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/doctrine/event-manager/zipball/a520bc093a0170feeb6b14e9d83f3a14452e64b3",
+                "reference": "a520bc093a0170feeb6b14e9d83f3a14452e64b3",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.1"
+            },
+            "conflict": {
+                "doctrine/common": "<2.9@dev"
+            },
+            "require-dev": {
+                "doctrine/coding-standard": "^4.0",
+                "phpunit/phpunit": "^7.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Doctrine\\Common\\": "lib/Doctrine/Common"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Roman Borschel",
+                    "email": "roman@code-factory.org"
+                },
+                {
+                    "name": "Benjamin Eberlei",
+                    "email": "kontakt@beberlei.de"
+                },
+                {
+                    "name": "Guilherme Blanco",
+                    "email": "guilhermeblanco@gmail.com"
+                },
+                {
+                    "name": "Jonathan Wage",
+                    "email": "jonwage@gmail.com"
+                },
+                {
+                    "name": "Johannes Schmitt",
+                    "email": "schmittjoh@gmail.com"
+                },
+                {
+                    "name": "Marco Pivetta",
+                    "email": "ocramius@gmail.com"
+                }
+            ],
+            "description": "Doctrine Event Manager component",
+            "homepage": "https://www.doctrine-project.org/projects/event-manager.html",
+            "keywords": [
+                "event",
+                "eventdispatcher",
+                "eventmanager"
+            ],
+            "time": "2018-06-11T11:59:03+00:00"
+        }
+    ],
+    "packages-dev": [],
+    "aliases": [],
+    "minimum-stability": "stable",
+    "stability-flags": [],
+    "prefer-stable": false,
+    "prefer-lowest": false,
+    "platform": {
+        "php": ">=7.1"
+    },
+    "platform-dev": []
+}