Harwinder Sekhon
c6a970880c
Scanner indexes quiz files found next to videos ([&] questions, "- " options, "-- Correct" markers; _notsolved twins ignored). Quizzes appear in the folder content list interleaved with videos by filename order. New api/quiz.php serves questions without answers and grades attempts server-side; per-user best/last score and attempts stored in quiz_progress. Folder/course progress now aggregates videos + quizzes with partial credit for partial scores.
123 lines
4.1 KiB
PHP
123 lines
4.1 KiB
PHP
<?php
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// GET api/quiz.php?id=N -> quiz questions + options (no answers) + user's results
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// POST api/quiz.php -> grade an attempt, save the result
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// JSON body: {quiz_id, answers: [[optIdx,...], ...]} (one array per question)
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// Response includes the correct options so the UI can mark the attempt.
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require_once __DIR__ . '/../includes/auth.php';
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require_once __DIR__ . '/../includes/functions.php';
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header('Content-Type: application/json');
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$userId = requireLoginApi();
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function quizProgressRow(int $userId, int $quizId): array
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{
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$stmt = db()->prepare(
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'SELECT best_score, last_score, total_questions, attempts, completed
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FROM quiz_progress WHERE user_id = ? AND quiz_id = ?'
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);
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$stmt->execute([$userId, $quizId]);
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return $stmt->fetch()
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?: ['best_score' => 0, 'last_score' => 0, 'total_questions' => 0,
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'attempts' => 0, 'completed' => 0];
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}
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if ($_SERVER['REQUEST_METHOD'] === 'GET') {
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$quiz = getQuiz((int)($_GET['id'] ?? 0));
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if (!$quiz) {
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http_response_code(404);
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echo json_encode(['error' => 'Quiz not found']);
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exit;
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}
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$file = quizFilePath($quiz);
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$questions = $file ? parseQuizFile($file) : [];
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if (!$questions) {
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http_response_code(404);
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echo json_encode(['error' => 'Quiz file is missing — rescan the library']);
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exit;
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}
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$folder = getFolder((int)$quiz['folder_id']);
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$p = quizProgressRow($userId, (int)$quiz['id']);
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echo json_encode([
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'quiz' => ['id' => (int)$quiz['id'], 'name' => $quiz['name']],
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'folder' => ['id' => (int)$folder['id'], 'name' => $folder['name']],
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'breadcrumbs' => array_map(
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fn($c) => ['id' => (int)$c['id'], 'name' => $c['name']],
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folderBreadcrumbs($folder)
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),
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'questions' => array_map(fn($q) => [
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'text' => $q['text'],
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'multi' => $q['multi'],
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'options' => $q['options'],
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], $questions),
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'progress' => [
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'attempts' => (int)$p['attempts'],
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'best_score' => (int)$p['best_score'],
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'last_score' => (int)$p['last_score'],
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'total' => count($questions),
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'completed' => (bool)$p['completed'],
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],
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]);
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exit;
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}
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if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
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http_response_code(405);
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echo json_encode(['error' => 'Method not allowed']);
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exit;
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}
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$data = json_decode(file_get_contents('php://input'), true) ?: [];
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$quiz = getQuiz((int)($data['quiz_id'] ?? 0));
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$answers = $data['answers'] ?? null;
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if (!$quiz || !is_array($answers)) {
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http_response_code(400);
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echo json_encode(['error' => 'Bad request']);
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exit;
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}
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$file = quizFilePath($quiz);
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$questions = $file ? parseQuizFile($file) : [];
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if (!$questions) {
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http_response_code(404);
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echo json_encode(['error' => 'Quiz file is missing — rescan the library']);
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exit;
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}
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$score = 0;
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$results = [];
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foreach ($questions as $i => $q) {
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$selected = array_values(array_unique(array_map('intval', (array)($answers[$i] ?? []))));
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sort($selected);
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$correct = $q['correct'];
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sort($correct);
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$isCorrect = $selected === $correct;
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if ($isCorrect) $score++;
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$results[] = [
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'correct' => $isCorrect,
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'correct_options' => $correct,
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'selected' => $selected,
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];
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}
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$total = count($questions);
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$completed = ($score === $total) ? 1 : 0;
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db()->prepare(
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'INSERT INTO quiz_progress
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(user_id, quiz_id, best_score, last_score, total_questions, attempts, completed)
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VALUES (?, ?, ?, ?, ?, 1, ?)
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ON DUPLICATE KEY UPDATE
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last_score = VALUES(last_score),
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best_score = GREATEST(best_score, VALUES(best_score)),
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total_questions = VALUES(total_questions),
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attempts = attempts + 1,
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completed = GREATEST(completed, VALUES(completed))'
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)->execute([$userId, (int)$quiz['id'], $score, $score, $total, $completed]);
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echo json_encode([
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'score' => $score,
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'total' => $total,
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'completed' => (bool)$completed,
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'results' => $results,
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]);
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