feat: add klarna provider (#1297)

Co-authored-by: Taher Dhilawala <[email protected]>
Co-authored-by: Lucas Michot <[email protected]>

KlarnaExtendSocialite.php

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+<?php
+
+namespace SocialiteProviders\Klarna;
+
+use SocialiteProviders\Manager\SocialiteWasCalled;
+
+class KlarnaExtendSocialite
+{
+    public function handle(SocialiteWasCalled $socialiteWasCalled): void
+    {
+        $socialiteWasCalled->extendSocialite('klarna', Provider::class);
+    }
+}

Provider.php

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+<?php
+
+namespace SocialiteProviders\Klarna;
+
+use GuzzleHttp\RequestOptions;
+use SocialiteProviders\Manager\OAuth2\AbstractProvider;
+use SocialiteProviders\Manager\OAuth2\User;
+
+class Provider extends AbstractProvider
+{
+    public const IDENTIFIER = 'KLARNA';
+
+    /**
+     * The separating character for the requested scopes.
+     *
+     * @var string
+     */
+    protected $scopeSeparator = ' ';
+
+    protected function getAuthUrl($state): string
+    {
+        return $this->buildAuthUrlFromBase('https://login.klarna.com/eu/lp/idp/oauth2/auth', $state);
+    }
+
+    protected function getTokenUrl(): string
+    {
+        return 'https://login.klarna.com/eu/lp/idp/oauth2/token';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function getUserByToken($token)
+    {
+        $response = $this->getHttpClient()->get('https://login.klarna.com/eu/lp/idp/userinfo', [
+            RequestOptions::HEADERS => [
+                'Accept'        => 'application/json',
+                'Authorization' => 'Bearer '.$token,
+            ],
+        ]);
+
+        return json_decode((string) $response->getBody(), true);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function mapUserToObject(array $user)
+    {
+        return (new User)->setRaw($user)->map([
+            'id'                                     => $user['sub'],
+            'nickname'                               => $user['given_name'],
+            'name'                                   => $user['given_name'].' '.$user['family_name'],
+            'email'                                  => $user['email'],
+            'email_verified'                         => $user['email_verified'],
+            'avatar'                                 => null,
+            'national_identification_number'         => $user['national_identification_number'] ?? null,
+            'national_identification_number_country' => $user['national_identification_number_country'] ?? null,
+            'phone'                                  => $user['phone'] ?? null,
+            'phone_verified'                         => $user['phone_verified'] ?? null,
+        ]);
+    }
+}

README.md

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+# Intercom
+
+```bash
+composer require socialiteproviders/klarna
+```
+
+## Installation & Basic Usage
+
+Please see the [Base Installation Guide](https://socialiteproviders.com/usage/), then follow the provider specific instructions below.
+
+### Add configuration to `config/services.php`
+
+```php
+'klarna' => [
+  'client_id' => env('KLARNA_CLIENT_ID'),
+  'client_secret' => env('KLARNA_CLIENT_SECRET'),
+  'redirect' => env('KLARNA_REDIRECT_URI')
+],
+```
+
+### Add provider event listener
+
+#### Laravel 11+
+
+In Laravel 11, the default `EventServiceProvider` provider was removed. Instead, add the listener using the `listen` method on the `Event` facade, in your `AppServiceProvider` `boot` method.
+
+* Note: You do not need to add anything for the built-in socialite providers unless you override them with your own providers.
+
+```php
+Event::listen(function (\SocialiteProviders\Manager\SocialiteWasCalled $event) {
+    $event->extendSocialite('klarna', \SocialiteProviders\Klarna\Provider::class);
+});
+```
+<details>
+<summary>
+Laravel 10 or below
+</summary>
+Configure the package's listener to listen for `SocialiteWasCalled` events.
+
+Add the event to your `listen[]` array in `app/Providers/EventServiceProvider`. See the [Base Installation Guide](https://socialiteproviders.com/usage/) for detailed instructions.
+
+```php
+protected $listen = [
+    \SocialiteProviders\Manager\SocialiteWasCalled::class => [
+        // ... other providers
+        \SocialiteProviders\Klarna\KlarnaExtendSocialite::class.'@handle',
+    ],
+];
+```
+</details>
+
+### Usage
+
+You should now be able to use the provider like you would regularly use Socialite (assuming you have the facade installed):
+
+```php
+return Socialite::driver('klarna')->redirect();
+```
+
+### Returned User fields
+
+- ``id``
+- ``name``
+- ``nickname`` (same as ``first_name`` in ``name``)
+- ``email``
+- ``email_verified`` (boolean indicating if the email is verified)
+- ``phone``
+- ``phone_verified`` (boolean indicating if the phone is verified)
+- ``national_identification_number``
+- ``national_identification_number_country``

composer.json

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+{
+    "name": "socialiteproviders/klarna",
+    "description": "Klarna Oauth2 Provider for Laravel Socialite",
+    "license": "MIT",
+    "keywords": [
+        "klarna",
+        "laravel",
+        "oauth",
+        "provider",
+        "socialite"
+    ],
+    "authors": [
+        {
+            "name": "Taher Dhilawala",
+            "email": "[email protected]"
+        }
+    ],
+    "support": {
+        "issues": "https://github.com/socialiteproviders/providers/issues",
+        "source": "https://github.com/socialiteproviders/providers",
+        "docs": "https://socialiteproviders.com/klarna"
+    },
+    "require": {
+        "php": "^8.0",
+        "ext-json": "*",
+        "socialiteproviders/manager": "^4.4"
+    },
+    "autoload": {
+        "psr-4": {
+            "SocialiteProviders\\Klarna\\": ""
+        }
+    }
+}