Initial revision supporting obtaining bearer authentication tokens

composer.json

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+{
+    "name": "leenooks/intuit",
+    "description": "Intuit API",
+    "keywords": ["laravel","leenooks","intuit"],
+    "authors": [
+        {
+            "name": "Deon George",
+            "email": "deon@leenooks.net"
+        }
+    ],
+    "require": {
+        "jenssegers/model": "^1.5"
+    },
+    "require-dev": {
+    },
+    "autoload": {
+        "psr-4": {
+            "Intuit\\": "src"
+        }
+    },
+	"extra": {
+		"laravel": {
+			"providers": [
+				"Intuit\\Providers\\IntuitServiceProvider"
+			]
+		}
+	},
+    "minimum-stability": "dev"
+}

src/Providers/IntuitServiceProvider.php

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+<?php
+
+namespace Intuit\Providers;
+
+use Illuminate\Routing\Router;
+use Illuminate\Support\ServiceProvider;
+
+/**
+ * Class IntuitServiceProvider.
+ */
+class IntuitServiceProvider extends ServiceProvider
+{
+	private string $_path = '';
+
+	/**
+	 * Bootstrap the application services.
+	 *
+	 * @param Router $router
+	 */
+	public function boot(Router $router)
+	{
+		$this->mergeConfigFrom($this->_path.'/config/intuit.php','intuit');
+	}
+
+	/**
+	 * Register the application services.
+	 *
+	 * @return void
+	 */
+	public function register()
+	{
+		if (! $this->_path) {
+			$this->_path = realpath(__DIR__.'/../../src');
+		}
+	}
+}

src/Providers/Socialite/IntuitProvider.php

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+<?php
+
+namespace Intuit\Providers\Socialite;
+
+use Illuminate\Support\Arr;
+use Illuminate\Support\Facades\Auth;
+use Laravel\Socialite\Two\InvalidStateException;
+use Laravel\Socialite\Two\ProviderInterface;
+use Laravel\Socialite\Two\AbstractProvider;
+use Laravel\Socialite\Two\User as SocialUser;
+
+class IntuitProvider extends AbstractProvider implements ProviderInterface
+{
+	private const hosts = [
+		'authorise' => 'https://appcenter.intuit.com/connect/oauth2',
+		'accesstoken' => 'https://oauth.platform.intuit.com/oauth2/v1/tokens/bearer',
+		'local' => 'https://sandbox-quickbooks.api.intuit.com',
+		'production' => 'https://quickbooks.api.intuit.com',
+	];
+	protected $scopes = ['com.intuit.quickbooks.accounting'];
+
+	/* ABSTRACT */
+
+	protected function getAuthUrl($state)
+	{
+		return $this->buildAuthUrlFromBase(
+			Arr::get(self::hosts,'authorise'),
+			$state
+		);
+	}
+
+	protected function getUserByToken($token)
+	{
+		$response = [];
+
+		$access = $this->getAccessTokenResponse($token);
+
+		if ((! $x=Arr::get($access,'token_type')) || ($x !== 'bearer')) {
+			$response['reject'] = TRUE;
+			$response['reject_reason'] = 'No bearer token?';
+
+			return $response;
+		}
+
+		return $response ?: $access;
+	}
+
+	protected function getTokenUrl()
+	{
+		return Arr::get(self::hosts,'accesstoken');
+	}
+
+	protected function mapUserToObject(array $user)
+	{
+		return (new SocialUser)->setRaw(Auth::user()->toArray());
+	}
+
+	/* OVERRIDES */
+
+	public function user()
+	{
+		if ($this->hasInvalidState()) {
+			throw new InvalidStateException;
+		}
+
+		if (! $this->getCode())
+			return NULL;
+
+		$details = $this->getUserByToken($this->getCode());
+
+		if ((! $details) || Arr::get($details,'reject'))
+			abort(403, sprintf('Authentication Failed with %s',Arr::get($details,'reject_reason','*no reason given*')));
+
+		$user = $this->mapUserToObject($details);
+		$user->refresh_token_expires_in = Arr::get($details,'x_refresh_token_expires_in');
+		$user->realmid = $this->request->get('realmId');
+
+		return $user->setToken(Arr::get($details,'access_token'))
+			->setRefreshToken(Arr::get($details,'refresh_token'))
+			->setExpiresIn(Arr::get($details,'expires_in'));
+	}
+}

src/Traits/IntuitSocialite.php

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+<?php
+
+/**
+ * Setup for Intuit authentication
+ */
+namespace Intuit\Traits;
+
+use Illuminate\Support\Arr;
+use Intuit\Providers\Socialite\IntuitProvider;
+
+trait IntuitSocialite
+{
+	private function bootIntuitSocialite()
+	{
+		$socialite = $this->app->make('Laravel\Socialite\Contracts\Factory');
+
+		$socialite->extend('intuit', function ($app) use ($socialite) {
+			$config = Arr::get($app,'config.intuit');
+
+			return $socialite->buildProvider(IntuitProvider::class, $config);
+		});
+	}
+}

src/config/intuit.php

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+<?php
+
+return [
+	'client_id' => env('AUTH_INTUIT_CLIENT_ID'),
+	'client_secret' => env('AUTH_INTUIT_SECRET_KEY'),
+	'redirect' => '/auth/intuit/token',
+];