Laravel 5.3 upgrade (#189)

* Started move to laravel 5.3

* Started updating login & registration flows for laravel 5.3 update

* Updated app emails to notification system

* Fixed registations bugs and removed email confirmation model

* Fixed large portion of laravel post-upgrade issues

* Fixed and tested LDAP process

app/Http/Controllers/Auth/LoginController.php

@@ -0,0 +1,123 @@
+<?php
+
+namespace BookStack\Http\Controllers\Auth;
+
+use BookStack\Http\Controllers\Controller;
+use BookStack\Repos\UserRepo;
+use BookStack\Services\SocialAuthService;
+use Illuminate\Contracts\Auth\Authenticatable;
+use Illuminate\Foundation\Auth\AuthenticatesUsers;
+use Illuminate\Http\Request;
+
+class LoginController extends Controller
+{
+    /*
+    |--------------------------------------------------------------------------
+    | Login Controller
+    |--------------------------------------------------------------------------
+    |
+    | This controller handles authenticating users for the application and
+    | redirecting them to your home screen. The controller uses a trait
+    | to conveniently provide its functionality to your applications.
+    |
+    */
+
+    use AuthenticatesUsers;
+
+    /**
+     * Where to redirect users after login.
+     *
+     * @var string
+     */
+    protected $redirectTo = '/';
+
+    protected $redirectPath = '/';
+    protected $redirectAfterLogout = '/login';
+
+    protected $socialAuthService;
+    protected $userRepo;
+
+    /**
+     * Create a new controller instance.
+     *
+     * @param SocialAuthService $socialAuthService
+     * @param UserRepo $userRepo
+     */
+    public function __construct(SocialAuthService $socialAuthService, UserRepo $userRepo)
+    {
+        $this->middleware('guest', ['only' => ['getLogin', 'postLogin']]);
+        $this->socialAuthService = $socialAuthService;
+        $this->userRepo = $userRepo;
+        $this->redirectPath = baseUrl('/');
+        $this->redirectAfterLogout = baseUrl('/login');
+        parent::__construct();
+    }
+
+    public function username()
+    {
+        return config('auth.method') === 'standard' ? 'email' : 'username';
+    }
+
+    /**
+     * Overrides the action when a user is authenticated.
+     * If the user authenticated but does not exist in the user table we create them.
+     * @param Request $request
+     * @param Authenticatable $user
+     * @return \Illuminate\Http\RedirectResponse
+     * @throws AuthException
+     */
+    protected function authenticated(Request $request, Authenticatable $user)
+    {
+        // Explicitly log them out for now if they do no exist.
+        if (!$user->exists) auth()->logout($user);
+
+        if (!$user->exists && $user->email === null && !$request->has('email')) {
+            $request->flash();
+            session()->flash('request-email', true);
+            return redirect('/login');
+        }
+
+        if (!$user->exists && $user->email === null && $request->has('email')) {
+            $user->email = $request->get('email');
+        }
+
+        if (!$user->exists) {
+
+            // Check for users with same email already
+            $alreadyUser = $user->newQuery()->where('email', '=', $user->email)->count() > 0;
+            if ($alreadyUser) {
+                throw new AuthException('A user with the email ' . $user->email . ' already exists but with different credentials.');
+            }
+
+            $user->save();
+            $this->userRepo->attachDefaultRole($user);
+            auth()->login($user);
+        }
+
+        $path = session()->pull('url.intended', '/');
+        $path = baseUrl($path, true);
+        return redirect($path);
+    }
+
+    /**
+     * Show the application login form.
+     * @return \Illuminate\Http\Response
+     */
+    public function getLogin()
+    {
+        $socialDrivers = $this->socialAuthService->getActiveDrivers();
+        $authMethod = config('auth.method');
+        return view('auth/login', ['socialDrivers' => $socialDrivers, 'authMethod' => $authMethod]);
+    }
+
+    /**
+     * Redirect to the relevant social site.
+     * @param $socialDriver
+     * @return \Symfony\Component\HttpFoundation\RedirectResponse
+     */
+    public function getSocialLogin($socialDriver)
+    {
+        session()->put('social-callback', 'login');
+        return $this->socialAuthService->startLogIn($socialDriver);
+    }
+}