<?php
namespace App\Http\Controllers\student;
use App\Http\Controllers\Controller;
use App\Models\Lesson;
use App\Models\Question;
use App\Models\QuizSubmission;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Session;
class QuizController extends Controller
{
public function quiz_submit(Request $request)
{
$retake = Lesson::where('id', $request->quiz_id)->value('retake');
$submit = QuizSubmission::where('quiz_id', $request->quiz_id)->where('user_id', auth()->user()->id)->count();
if ($submit > $retake) {
Session::flash('warning', get_phrase('Attempt has been over.'));
return redirect()->back();
}
$inputs = collect($request->all());
$quiz_id = $inputs->pull('quiz_id');
$inputs->forget(['_token', 'quiz_id']);
$submits = $inputs->whereNotNull();
foreach ($submits as $key => $submit) {
if (is_string($submit) && ($submit != 'true' && $submit != 'false')) {
$submits[$key] = array_column(json_decode($submit), 'value');
}
}
$question_ids = $submits->keys();
$submitted_answers = $submits->values();
$questions = Question::whereIn('id', $question_ids)->get();
$right_answers = $wrong_answers = [];
foreach ($questions as $key => $question) {
$correct_answer = json_decode($question->answer, true);
$submitted = $submitted_answers[$key];
if ($question->type == 'mcq') {
$isCorrect = empty(array_diff($correct_answer, $submitted));
} elseif ($question->type == 'fill_blanks') {
$isCorrect = count($correct_answer) === count($submitted);
if ($isCorrect) {
for ($i = 0; $i < count($correct_answer); $i++) {
if (strtolower($correct_answer[$i]) != strtolower($submitted[$i])) {
$isCorrect = false;
break;
}
}
} else {
$isCorrect = false;
}
} elseif ($question->type == 'true_false') {
$isCorrect = strtolower(json_encode($correct_answer)) == strtolower($submitted);
}
$isCorrect ? $right_answers[] = $question->id : $wrong_answers[] = $question->id;
}
$data['quiz_id'] = $quiz_id;
$data['user_id'] = auth()->user()->id;
$data['correct_answer'] = $right_answers ? json_encode($right_answers) : null;
$data['wrong_answer'] = $wrong_answers ? json_encode($wrong_answers) : null;
$data['submits'] = $submits->count() > 0 ? json_encode($submits->toArray()) : null;
QuizSubmission::insert($data);
Session::flash('success', get_phrase('Your answers have been submitted.'));
return redirect()->back();
}
public function load_result(Request $request)
{
$page_data['quiz'] = Lesson::where('id', $request->quiz_id)->first();
$page_data['questions'] = Question::where('quiz_id', $request->quiz_id)->get();
$page_data['result'] = QuizSubmission::where('id', $request->submit_id)
->where('quiz_id', $request->quiz_id)
->where('user_id', auth()->user()->id)
->first();
return view('course_player.quiz.result', $page_data);
}
public function load_questions(Request $request)
{
$page_data['quiz'] = Lesson::where('id', $request->quiz_id)->first();
$page_data['questions'] = Question::where('quiz_id', $request->quiz_id)->get();
$page_data['submits'] = QuizSubmission::where('quiz_id', $request->quiz_id)
->where('user_id', auth()->user()->id)
->get();
return view('course_player.quiz.questions', $page_data);
}
}