Added start of API

Author: voidgraphics

.gitignore

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+/vendor/
+.idea
+.DS_Store

README.md

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 # multisafepay-php
-An unofficial wrapper for the MultiSafePay API.
+A wrapper for the MultiSafePay API.
+
+## Installation
+
+```
+composer require whitecube/multisafepay-php
+```
+
+## Usage
+
+You must specify two things before beginning to use the API:
+- The application environment (accepted values are  `production` or `test`)
+- Your MultiSafepay API key
+
+```php
+$client = new Whitecube\MultiSafepay\Client('production', 'your-api-key');
+
+// Example: Get an existing order
+$order = $client->orders()->show('order-id');
+```
+
+### Orders
+
+The Orders API lives under the `orders` method on the client.
+```php
+$client->orders()->...
+```
+
+#### Creating orders
+[See official docs.](https://docs.multisafepay.com/api/#create-an-order)  
+Orders are represented by PHP Objects but can be submitted as regular associative arrays.
+
+```php
+use Whitecube\MultiSafepay\Entities\Order;
+
+$order = new Order('my-order-id')
+             ->type('redirect')
+             ->amount(20)
+             ->currency('EUR')
+             ->description('2 movie tickets')
+             ->paymentOptions([
+                 'notification_url' => 'http://www.example.com/client/notification?type=notification',
+                 'redirect_url' => 'http://www.example.com/client/notification?type=redirect',
+                 'cancel_url' => 'http://www.example.com/client/notification?type=cancel', 
+                 'close_window' => ''
+             ]);
+             
+$client->orders()->create($order);
+
+// Or as an associative array
+
+$client->orders()->create([
+    'order_id' => 'my-order-id',
+    'type' => 'redirect',
+    'amount' => 20,
+    'currency' => 'EUR',
+    'description' => '2 movie tickets',
+    'payment_options' => [
+        'notification_url' => 'http://www.example.com/client/notification?type=notification',
+        'redirect_url' => 'http://www.example.com/client/notification?type=redirect',
+        'cancel_url' => 'http://www.example.com/client/notification?type=cancel', 
+        'close_window' => ''
+    ]
+]);
+
+```
+
+#### Getting orders
+[See official docs.](https://docs.multisafepay.com/api/#retrieve-an-order)
+Fetch an existing order's information
+
+```php
+$client->orders()->fetch('order-id');
+```
+
+#### Updating orders
+[See official docs.](https://docs.multisafepay.com/api/#update-an-order)
+
+```php
+$client->orders()->update('order-id', [
+    'status' => 'completed', 
+    //...
+]);
+```

composer.json

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+{
+    "name": "whitecube/multisafepay-php",
+    "description": "An unofficial wrapper for the MultiSafepay API.",
+    "authors": [
+        {
+            "name": "Adrien Leloup",
+            "email": "[email protected]"
+        }
+    ],
+    "require": {
+        "php": ">=7.1.0",
+        "guzzlehttp/guzzle": "^6.3",
+        "php-http/message": "^1.8"
+    },
+    "autoload": {
+        "psr-4": {
+            "Whitecube\\MultiSafepay\\": "src/"
+        }
+    },
+    "extra": {
+        "laravel": {
+            "providers": [
+                "Whitecube\\MultiSafepay\\MultiSafepayServiceProvider"
+            ]
+        }
+    }
+}