Laravel 5.2 Socialite Middleware Example

routes.php

<?php

/*
 * SocialiteFacebookController is just a stub. 
 * I'm not really sure how to create a route without controller or closure.
 * Please, feel free to share this information :)
 */

Route::get('auth/facebook', [
	'middleware' => 'App\Http\Middleware\SocialiteRedirectToProviderMiddleware:facebook',
	'uses' => 'SocialiteFacebookController@index'
]);

Route::get('auth/facebook/callback', [
	'middleware' => 'App\Http\Middleware\SocialiteCallbackMiddleware:facebook',
	'uses' => 'SocialiteFacebookController@store'
]);

SocialiteCallbackMiddleware.php

<?php

namespace App\Http\Middleware;

use Closure;

use Laravel\Socialite\Facades\Socialite;

class SocialiteCallbackMiddleware
{
	/**
	 * Handle an incoming request.
	 *
	 * @param  \Illuminate\Http\Request  $request
	 * @param  \Closure  $next
	 * @param  string $providerDriver
	 *
	 * @return mixed
	 */
	public function handle($request, Closure $next, $providerDriver = null)
	{
		$socialite = Socialite::driver($providerDriver)->user();
		
		/**
		 * You can do whatever you want. All user's data are in $socialite.
		 * 
		 * Such as:
		 * $socialite->getId();
		 * $socialite->getEmail();
		 * $socialite->getName();
		 * $socialite->getAvatar();
		 * and etc.
		 */
		
		return $next($request);
	}
}

SocialiteRedirectToProviderMiddleware.php

<?php

namespace App\Http\Middleware;

use Closure;

use Laravel\Socialite\Facades\Socialite;

class SocialiteRedirectToProviderMiddleware
{
	/**
	 * Handle an incoming request.
	 *
	 * @param  \Illuminate\Http\Request  $request
	 * @param  \Closure  $next
	 * @param  string $providerDriver
	 *
	 * @return mixed
	 */
	public function handle($request, Closure $next, $providerDriver = null)
	{
		/**
		 * Redirect authenticated user to homepage
		 */
		if (auth()->check()) {
			return redirect('/');
		}
		
		/**
		 * Making redirect through socialite driver
		 */
		return Socialite::driver($providerDriver)->redirect();
		
	}
}