Allow automatic shift exchanges

.env.example

@@ -8,9 +8,9 @@ APP_URL=http://localhost
 DB_CONNECTION=mysql
 DB_HOST=127.0.0.1
 DB_PORT=3306
-DB_DATABASE=homestead
-DB_USERNAME=homestead
-DB_PASSWORD=secret
+DB_DATABASE=swap
+DB_USERNAME=root
+DB_PASSWORD=swap
 
 BROADCAST_DRIVER=log
 CACHE_DRIVER=file
@@ -28,6 +28,9 @@ MAIL_USERNAME=null
 MAIL_PASSWORD=null
 MAIL_ENCRYPTION=null
 
+SOLVER_HOST=10.0.2.2
+SOLVER_PORT=4567
+
 PUSHER_APP_ID=
 PUSHER_APP_KEY=
 PUSHER_APP_SECRET=

Vagrantfile

@@ -0,0 +1,72 @@
+# -*- mode: ruby -*-
+# vi: set ft=ruby :
+
+# All Vagrant configuration is done below. The "2" in Vagrant.configure
+# configures the configuration version (we support older styles for
+# backwards compatibility). Please don't change it unless you know what
+# you're doing.
+Vagrant.configure("2") do |config|
+  # The most common configuration options are documented and commented below.
+  # For a complete reference, please see the online documentation at
+  # https://docs.vagrantup.com.
+
+  # Every Vagrant development environment requires a box. You can search for
+  # boxes at https://vagrantcloud.com/search.
+  config.vm.box = "ubuntu/focal64"
+  config.vm.provision :shell, path: "bootstrap.sh"
+  config.vm.network "private_network", ip: "192.168.56.21"
+  config.vm.synced_folder "./", "/vagrant", type: "rsync", rsync__auto: true, rsync__exclude: ['./node_modules*']
+  # Disable automatic box update checking. If you disable this, then
+  # boxes will only be checked for updates when the user runs
+  # `vagrant box outdated`. This is not recommended.
+  # config.vm.box_check_update = false
+
+  # Create a forwarded port mapping which allows access to a specific port
+  # within the machine from a port on the host machine. In the example below,
+  # accessing "localhost:8080" will access port 80 on the guest machine.
+  # NOTE: This will enable public access to the opened port
+  # config.vm.network "forwarded_port", guest: 80, host: 8080
+
+  # Create a forwarded port mapping which allows access to a specific port
+  # within the machine from a port on the host machine and only allow access
+  # via 127.0.0.1 to disable public access
+  # config.vm.network "forwarded_port", guest: 80, host: 8080, host_ip: "127.0.0.1"
+
+  # Create a private network, which allows host-only access to the machine
+  # using a specific IP.
+  # config.vm.network "private_network", ip: "192.168.33.10"
+
+  # Create a public network, which generally matched to bridged network.
+  # Bridged networks make the machine appear as another physical device on
+  # your network.
+  # config.vm.network "public_network"
+
+  # Share an additional folder to the guest VM. The first argument is
+  # the path on the host to the actual folder. The second argument is
+  # the path on the guest to mount the folder. And the optional third
+  # argument is a set of non-required options.
+  # config.vm.synced_folder "../data", "/vagrant_data"
+
+  # Provider-specific configuration so you can fine-tune various
+  # backing providers for Vagrant. These expose provider-specific options.
+  # Example for VirtualBox:
+  #
+  # config.vm.provider "virtualbox" do |vb|
+  #   # Display the VirtualBox GUI when booting the machine
+  #   vb.gui = true
+  #
+  #   # Customize the amount of memory on the VM:
+  #   vb.memory = "1024"
+  # end
+  #
+  # View the documentation for the provider you are using for more
+  # information on available options.
+
+  # Enable provisioning with a shell script. Additional provisioners such as
+  # Ansible, Chef, Docker, Puppet and Salt are also available. Please see the
+  # documentation for more information about their specific syntax and use.
+  # config.vm.provision "shell", inline: <<-SHELL
+  #   apt-get update
+  #   apt-get install -y apache2
+  # SHELL
+end

app/Http/Controllers/EnrollmentAutomaticExchangeController.php

@@ -0,0 +1,110 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\Judite\Models\Course;
+use App\Judite\Models\Exchange;
+use App\Judite\Models\Enrollment;
+use App\Judite\Models\Shift;
+use App\Judite\Models\solver;
+use Illuminate\Support\Facades\DB;
+use App\Events\ExchangeWasConfirmed;
+use Illuminate\Support\Facades\Auth;
+use App\Http\Requests\AutoExchange\CreateRequest;
+use App\Exceptions\EnrollmentCannotBeExchangedException;
+use App\Exceptions\ExchangeEnrollmentsOnDifferentCoursesException;
+
+class EnrollmentAutomaticExchangeController extends Controller
+{
+	/**
+	 * Create a new controller instance.
+	 */
+	public function __construct()
+	{
+		$this->middleware('auth');
+		$this->middleware('can.student');
+		$this->middleware('student.verified');
+		$this->middleware('can.exchange');
+	}
+
+	/**
+	 * Show the form for creating a new resource.
+	 *
+	 * @param int $id
+	 *
+	 * @return \Illuminate\View\View|\Illuminate\Http\RedirectResponse
+	 */
+	public function create($id)
+	{
+		try {
+			$data = DB::transaction(function () use ($id) {
+				$enrollment = Auth::student()->enrollments()->findOrFail($id);
+				$course = $enrollment->course()->first();
+				$to_shift_tag = $enrollment->shift()->value('tag');
+
+				if (! $enrollment->availableForExchange()) {
+					throw new \LogicException('The enrollment is not available for exchange.');
+				}
+
+				$matchingShifts = $course->shifts()->where('tag','!=',$to_shift_tag)->orderBy('tag','asc')->get();
+
+				return compact('enrollment','to_shift_tag', 'matchingShifts');
+			});
+
+            $data['matchingShifts'] = $data['matchingShifts']->map(function ($item) {
+                return [
+                    'tag' => $item->tag,
+                    '_toString' => $item->present()->inlineToString(),
+                ];
+            });
+			return view('autoExchanges.create', $data);
+
+		} catch (\LogicException $e) {
+			flash($e->getMessage())->error();
+
+			return redirect()->route('dashboard');
+		}
+	}
+
+	/**
+	 * Store a newly created resource in storage.
+	 *
+	 * @param int                                       $id
+	 * @param \App\Http\Requests\AutoExchange\CreateRequest $request
+	 *
+	 * @return \Illuminate\Http\RedirectResponse
+	 */
+	public function store($id, CreateRequest $request)
+	{
+		try {
+
+			$exchange = DB::transaction(function () use ($id, $request) {
+
+
+				$fromEnrollment = Auth::student()->enrollments()->findOrFail($id);
+                                $toShift = $fromEnrollment->course()->first()->getShiftByTag($request->input('to_shift_tag'));
+				$toEnrollment = Enrollment::make();
+				$toEnrollment->student()->associate(null);
+				$toEnrollment->course()->associate($fromEnrollment->course()->first());
+				$toEnrollment->shift()->associate($toShift);
+                               $toEnrollment->save();
+
+				$exchange = Exchange::make();
+				$exchange->setExchangeEnrollments($fromEnrollment, $toEnrollment);
+				$exchange->save();
+
+				return $exchange;
+			});
+            DB::beginTransaction();
+	    $message = 'The exchange was successfully saved';
+	    flash($message)->success();
+            Solver::SolveAutomicExchangesOfCourse($exchange->course());
+            DB::commit();
+
+		} catch (EnrollmentCannotBeExchangedException | ExchangeEnrollmentsOnDifferentCoursesException $e) {
+			flash($e->getMessage())->error();
+		}
+
+		return redirect()->route('dashboard');
+	}
+}

app/Http/Controllers/ExchangeController.php

@@ -72,10 +72,16 @@ public function decline($id)
     public function destroy($id)
     {
         DB::transaction(function () use ($id) {
-            Auth::student()->requestedExchanges()->findOrFail($id)->delete();
+            $exchange=Auth::student()->requestedExchanges()->findOrFail($id);
+            $enrollment=$exchange->toEnrollment;
+            $exchange->delete();
+            if ($enrollment->student==null){
+                $enrollment->delete();
+            }
         });
         flash('The shift exchange request was successfully deleted.')->success();
 
         return redirect()->back();
     }
+
 }

app/Http/Middleware/AuthorizeAutoExchangeActions.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use Closure;
+
+class AuthorizeExchangeActions
+{
+    /**
+     * Handle an incoming request.
+     *
+     * @param \Illuminate\Http\Request $request
+     * @param \Closure                 $next
+     *
+     * @return mixed
+     */
+    public function handle($request, Closure $next)
+    {
+        if (! app('settings')->withinExchangePeriod()) {
+            flash('The exchanges period is closed. You are not allowed to perform this action.')->error();
+
+            return redirect()->route('dashboard');
+        }
+
+        return $next($request);
+    }
+}

app/Http/Requests/AutoExchange/CreateRequest.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace App\Http\Requests\AutoExchange;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class CreateRequest extends FormRequest
+{
+    /**
+     * Determine if the user is authorized to make this request.
+     *
+     * @return bool
+     */
+    public function authorize()
+    {
+        return true;
+    }
+
+    /**
+     * Get the validation rules that apply to the request.
+     *
+     * @return array
+     */
+    public function rules()
+    {
+        return [
+            'to_shift_tag' => 'required',
+        ];
+    }
+}