laravel-elearning/app/Http/Controllers/TestController.php

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use App\Http\Requests;
use App\Test;
use App\Testdetail;
use App\Question;
use App\Option;
use App\Group;

class TestController extends Controller
{
    public function startTest(Test $test)
    {
        if (Auth::user()->testTaken(2)) {
            //insert session flash
            return redirect('/home');
        }
        session(['questions' => $test->randomizeQuestions(), 'question_counter' => 0, 'test' => $test, 'wrong_answers' => 0, 'is_correct' => false, 'has_failed' => false, 'last_question' => false]);
        return redirect()->action('TestController@showQuestion');
    }

    public function showQuestion()
    {
        session(['question_counter' => session('question_counter')+1]);
        $question = session('questions')->get(session('question_counter')-1);
        $options = $question->options->shuffle();
        session(['options' => $options]);
        return view('tests.index', compact('question'), compact('options'));
    }

    public function answerQuestion()
    {
        $question = session('questions')->get(session('question_counter')-1);
        $question_id = $question->id;
        $answer_id = request()->get('answer');
        if (!empty(session('answers'))) {
            $answers = session('answers');
        }
        $answers["$question_id"] = $answer_id;
        session(['answers' => $answers]);

        if (!$question->isCorrect(session('answers')["$question->id"])) {
            session(['wrong_answers' => session('wrong_answers')+1]);
            session(['is_correct' => false]);
        } else {
            session(['is_correct' => true]);
        }

        if (session('test')->hasFailed(session('wrong_answers'))) {
            session(['has_failed' => true]);
        }

        if (session('test')->lastQuestion(session('question_counter'))) {
            session(['last_question' => true]);
        }
        return redirect()->action('TestController@showAnswer');
    }

    public function showAnswer()
    {
        $question = session('questions')->get(session('question_counter')-1);
        $options = session('options');
        return view('tests.answer', compact("question"), compact("options"));
    }

    public function testRetry(Test $test)
    {
        Auth::user()->storeTestdetails($test, session("has_failed"));
        $test->sessionPurge();
        return redirect("/test/$test->id");
    }

    public function testEnd(Test $test)
    {
        Auth::user()->storeTestdetails($test, session("has_failed"));
        $test->sessionPurge();
        return redirect("/home");
    }

    /**
     *
     * Common controller functions between moderators and administrators for handling tests and associated questions
     *
     */

    public function addTest()
    {
        $test = new Test();
        $test->createTest(request()->all());
        return redirect('/admin/tests');
    }

    public function confirmDeleteTest(Test $test)
    {
        return view('tests.delete', compact('test'));
    }

    public function confirmDeleteQuestion(Question $question)
    {
        return view('tests.question.delete', compact('question'));
    }

    public function deleteQuestion(Question $question)
    {
        $test = $question->test;
        $question->deleteQuestion();
        return redirect("/admin/tests/$test->id");
    }

    public function deleteTest(Test $test)
    {
        $test->deleteTest();
        return redirect('/admin/tests');
    }

    public function editQuestion(Question $question)
    {
        $options = $question->options;
        return view('tests.question.edit', compact('question'), compact('options'));
    }

    public function newQuestion(Test $test)
    {
        $question_number = $test->nextQuestionNumber();
        return view('tests.question.new', compact('test'), compact('question_number'));
    }

    public function updateTest(Test $test)
    {
        $test->updateTest(request()->all());
        return redirect("/admin/tests/$test->id");
    }

    public function showTest(Test $test)
    {
        $questions = $test->questions;
        return view('tests.show', compact('test'), compact('questions'));
    }

    public function newTest()
    {
        if (Auth::user()->isAdministrator()) {
            $groups = Group::all();
            return view('tests.new', compact('groups'));
        }
        return view('tests.new');
    }

    public function editTest(Test $test)
    {
        if (Auth::user()->isAdministrator()) {
            $groups = Group::all();
            return view('tests.edit', compact('test'), compact('groups'));
        }
        return view('tests.edit', compact('test'));
    }   

    /* REFACTOR */
    public function addQuestion(Test $test)
    {
        $question = new Question;
        $question->title = request()->title;
        $question->question = request()->question;
        if (empty(Option::all()->last()->id)) {
            $question->answer_id = 1;
        } else {
            $question->answer_id = Option::all()->last()->id+1;
        }
        $test->questions()->save($question);
        $option1 = new Option;
        $option1->option = request()->option1;
        $option2 = new Option;
        $option2->option = request()->option2;
        $option3 = new Option;
        $option3->option = request()->option3;
        $option4 = new Option;
        $option4->option = request()->option4;
        $question->options()->save($option1);
        $question->options()->save($option2);
        $question->options()->save($option3);
        $question->options()->save($option4);
        return redirect("/admin/tests/$test->id");
    }

    public function updateQuestion(Question $question)
    {
        $test = $question->test;
        $question->question = request()->question;
        $options = $question->options;
        $options[0]->option = request()->option1;
        $options[1]->option = request()->option2;
        $options[2]->option = request()->option3;
        $options[3]->option = request()->option4;
        $question->update();
        $options[0]->update();
        $options[1]->update();
        $options[2]->update();
        $options[3]->update();
        return redirect("/admin/tests/$test->id");
    }
    
}