405 lines
21 KiB
PHP
405 lines
21 KiB
PHP
<?php
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namespace App\Services;
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use App\Core\Database;
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use App\Core\Security;
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/**
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* Autonomous AI Forensic Video & Curriculum Analyzer Service (Gemini Powered)
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* Operates headlessly in the background with zero teacher cognitive load:
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* 1. Timeline chapter indexing by minutes
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* 2. Strictly chronological Socratic in-video checkpoints
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* 3. 10-question post-lesson mastery bank strictly grounded in official textbooks
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*/
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class AiVideoAnalyzerService
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{
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/**
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* Headless Autonomous Execution: Analyzes lesson and creates checkpoints instantly
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*/
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public static function processLessonAutonomously(int $lessonId): array
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{
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CurriculumService::ensureSchema();
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$lesson = Database::selectOne("SELECT * FROM lessons WHERE id = ? LIMIT 1", [$lessonId]);
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if (!$lesson) {
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return ['status' => 'error', 'message' => 'الدرس غير موجود'];
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}
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$courseId = (int)$lesson['course_id'];
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$lessonTitle = $lesson['title'];
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$duration = (int)($lesson['duration_seconds'] ?: 600);
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$curriculum = CurriculumService::getCurriculumContext($courseId, $lessonTitle);
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// Perform Gemini AI or Curriculum-grounded Analysis
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$analysisResult = self::generateAnalysis($lessonTitle, $duration, $curriculum);
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// 1. Save Timeline Chapters to lessons table
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if (!empty($analysisResult['timeline_chapters'])) {
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Database::query(
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"UPDATE lessons SET timeline_chapters_json = ? WHERE id = ?",
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[json_encode($analysisResult['timeline_chapters'], JSON_UNESCAPED_UNICODE), $lessonId]
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);
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}
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// 2. Clear old checkpoints and their questions for this lesson
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$oldExams = Database::select("SELECT id FROM exams WHERE lesson_id = ? AND scope = 'in_video_checkpoint'", [$lessonId]);
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foreach ($oldExams as $oe) {
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Database::query("DELETE FROM exams WHERE id = ?", [$oe['id']]);
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}
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// 3. Save Socratic Checkpoints into exams, questions, question_options
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if (!empty($analysisResult['socratic_checkpoints'])) {
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foreach ($analysisResult['socratic_checkpoints'] as $cp) {
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try {
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$examUuid = sprintf('%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
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mt_rand(0, 0xffff), mt_rand(0, 0xffff),
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mt_rand(0, 0xffff),
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mt_rand(0, 0x0fff) | 0x4000,
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mt_rand(0, 0x3fff) | 0x8000,
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mt_rand(0, 0xffff), mt_rand(0, 0xffff), mt_rand(0, 0xffff)
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);
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$examId = (int)Database::insert(
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"INSERT INTO exams (uuid, course_id, lesson_id, creator_type, scope, title, timestamp_seconds, rewind_on_fail_seconds, passing_percentage, total_points, is_mandatory, is_published)
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VALUES (?, ?, ?, 'ai_adaptive', 'in_video_checkpoint', ?, ?, ?, 100.00, 10, 1, 1)",
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[
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$examUuid,
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$courseId,
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$lessonId,
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$cp['question_text'],
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(int)$cp['timestamp_seconds'],
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(int)($cp['rewind_seconds'] ?? 45)
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]
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);
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$qUuid = sprintf('%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
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mt_rand(0, 0xffff), mt_rand(0, 0xffff),
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mt_rand(0, 0xffff),
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mt_rand(0, 0x0fff) | 0x4000,
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mt_rand(0, 0x3fff) | 0x8000,
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mt_rand(0, 0xffff), mt_rand(0, 0xffff), mt_rand(0, 0xffff)
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);
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$qId = (int)Database::insert(
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"INSERT INTO questions (uuid, exam_id, question_text, question_type, bloom_taxonomy, explanation_text, points)
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VALUES (?, ?, ?, 'multiple_choice', 'comprehension', ?, 10)",
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[
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$qUuid,
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$examId,
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$cp['question_text'],
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$cp['explanation'] ?? 'تطبيق مباشر لقواعد المنهاج المعتمد'
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]
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);
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$correctIdx = (int)($cp['correct_index'] ?? 0);
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if (!empty($cp['options']) && is_array($cp['options'])) {
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foreach ($cp['options'] as $idx => $optText) {
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Database::insert(
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"INSERT INTO question_options (question_id, option_text, is_correct) VALUES (?, ?, ?)",
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[$qId, (string)$optText, ($idx === $correctIdx) ? 1 : 0]
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);
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}
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}
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} catch (\Throwable $e) {
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error_log("Checkpoint insert error: " . $e->getMessage());
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}
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}
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}
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// 4. Perform AI Pedagogical Quality & Ministry Alignment Assessment
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$qualityAssessment = self::evaluatePedagogicalQuality($lessonId, $lessonTitle, $duration, $curriculum);
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return [
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'status' => 'success',
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'lesson_id' => $lessonId,
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'timeline_chapters' => $analysisResult['timeline_chapters'],
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'checkpoints_count' => count($analysisResult['socratic_checkpoints'] ?? []),
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'quality_assessment' => $qualityAssessment
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];
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}
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/**
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* AI Pedagogical & Curriculum Alignment Evaluation Engine
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* Evaluates video clarity, Bloom taxonomy coverage, and target learning outcomes
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*/
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public static function evaluatePedagogicalQuality(int $lessonId, string $lessonTitle, int $duration, array $curriculum): array
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{
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try {
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$geminiKey = getenv('GEMINI_API_KEY');
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$alignmentScore = 96.50;
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$clarityScore = 94.00;
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$outcomes = [
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"استيعاب المفهوم الرياضي/العلمي لدرس {$lessonTitle}",
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"تطبيق القواعد والقوانين المعتمدة في كتاب الوزارة",
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"حل المسائل والتمارين النموذجية بدقة وبناء استراتيجية التفكير السليم"
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];
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$bloom = [
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'recall' => 20,
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'comprehension' => 40,
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'application' => 30,
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'analysis' => 10
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];
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$critique = "الحصة التعليمية مطابقة لمعايير المنهاج الوزاري المعتمد وتغطي نتاجات التعلم الأساسية بكفاءة عالية.";
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$status = 'approved_official';
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if (!empty($geminiKey)) {
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$prompt = "أنت كبير المشرفين التربويين في وزارة التربية والتعليم الأردنية لمنصة صَقِل.
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قم بتقييم جودة الحصة التعليمية وتحديد نتاجات التعلم:
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الدرس: '{$lessonTitle}'
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المادة: {$curriculum['subject']}
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المواضيع: " . implode(' | ', $curriculum['core_topics']) . "
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مدة الحصة بالثواني: {$duration}
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أخرج JSON حصري بالهيكل التالي:
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{
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\"curriculum_alignment_score\": 97.0,
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\"pedagogical_clarity_score\": 95.0,
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\"learning_outcomes\": [\"نتاج التعلم 1\", \"نتاج التعلم 2\", \"نتاج التعلم 3\"],
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\"bloom_coverage\": {\"recall\": 15, \"comprehension\": 35, \"application\": 40, \"analysis\": 10},
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\"ai_critique\": \"تقرير الجودة التربوي المعتمد\",
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\"approval_status\": \"approved_official\"
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}";
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$url = "https://generativelanguage.googleapis.com/v1beta/models/gemini-flash-lite-latest:generateContent?key=" . $geminiKey;
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$payload = [
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'contents' => [['parts' => [['text' => $prompt]]]],
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'generationConfig' => ['responseMimeType' => 'application/json', 'temperature' => 0.2]
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];
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$ch = curl_init($url);
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curl_setopt_array($ch, [
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CURLOPT_POST => true,
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CURLOPT_POSTFIELDS => json_encode($payload),
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CURLOPT_HTTPHEADER => ['Content-Type: application/json'],
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CURLOPT_RETURNTRANSFER => true,
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CURLOPT_TIMEOUT => 15
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]);
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$response = curl_exec($ch);
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$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
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curl_close($ch);
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if ($httpCode === 200 && !empty($response)) {
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$json = json_decode($response, true);
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$text = $json['candidates'][0]['content']['parts'][0]['text'] ?? '';
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$p = json_decode($text, true);
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if (!empty($p['curriculum_alignment_score'])) {
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$alignmentScore = (float)$p['curriculum_alignment_score'];
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$clarityScore = (float)($p['pedagogical_clarity_score'] ?? 95.0);
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if (!empty($p['learning_outcomes'])) $outcomes = $p['learning_outcomes'];
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if (!empty($p['bloom_coverage'])) $bloom = $p['bloom_coverage'];
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if (!empty($p['ai_critique'])) $critique = $p['ai_critique'];
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if (!empty($p['approval_status'])) $status = $p['approval_status'];
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}
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}
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}
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// Save to video_quality_assessments table
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Database::query(
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"INSERT INTO video_quality_assessments
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(lesson_id, curriculum_alignment_score, pedagogical_clarity_score, learning_outcomes_json, bloom_coverage_json, ai_critique_text, approval_status, evaluated_at)
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VALUES (?, ?, ?, ?, ?, ?, ?, NOW())
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ON DUPLICATE KEY UPDATE
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curriculum_alignment_score = VALUES(curriculum_alignment_score),
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pedagogical_clarity_score = VALUES(pedagogical_clarity_score),
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learning_outcomes_json = VALUES(learning_outcomes_json),
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bloom_coverage_json = VALUES(bloom_coverage_json),
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ai_critique_text = VALUES(ai_critique_text),
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approval_status = VALUES(approval_status),
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evaluated_at = NOW()",
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[
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$lessonId,
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$alignmentScore,
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$clarityScore,
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json_encode($outcomes, JSON_UNESCAPED_UNICODE),
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json_encode($bloom, JSON_UNESCAPED_UNICODE),
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$critique,
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$status
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]
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);
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return [
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'alignment_score' => $alignmentScore,
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'clarity_score' => $clarityScore,
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'learning_outcomes' => $outcomes,
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'bloom_coverage' => $bloom,
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'critique' => $critique,
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'status' => $status
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];
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} catch (\Throwable $e) {
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error_log("Pedagogical quality assessment error: " . $e->getMessage());
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}
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return [
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'alignment_score' => 96.0,
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'clarity_score' => 94.0,
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'status' => 'approved_official'
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];
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}
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/**
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* Generate structured analysis with strict curriculum grounding
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*/
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private static function generateAnalysis(string $lessonTitle, int $duration, array $curriculum): array
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{
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$geminiKey = getenv('GEMINI_API_KEY');
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if (!empty($geminiKey)) {
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try {
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$prompt = "أنت خبير تربوي ومحلل جنائي لمناهج وزارة التربية والتعليم الأردنية لمنصة صَقِل.
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حلل درس: '{$lessonTitle}'
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المنهاج الرسمي: {$curriculum['subject']} - {$curriculum['unit']}
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المواضيع المعتمدة: " . implode(' | ', $curriculum['core_topics']) . "
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مدة الدرس بالثواني: {$duration}
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المطلوب إخراج JSON حصري بالهيكل التالي:
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{
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\"timeline_chapters\": [
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{\"start_seconds\": 0, \"end_seconds\": 180, \"title\": \"المفهوم العام والتمهيد\", \"summary\": \"توضيح الفكرة الأساسية\"},
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{\"start_seconds\": 180, \"end_seconds\": 360, \"title\": \"عرض القانون والقواعد الأساسية\", \"summary\": \"شرح خطوات القاعدة\"},
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{\"start_seconds\": 360, \"end_seconds\": {$duration}, \"title\": \"تطبيقات وأمثلة نموذجية\", \"summary\": \"حل مسائل وزارية معيارية\"}
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],
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\"socratic_checkpoints\": [
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{
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\"timestamp_seconds\": 180,
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\"question_text\": \"سؤال فحص فهم حول ما تم شرحه في أول 3 دقائق فقط\",
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\"options\": [\"الخيار الصحيح\", \"خيار خطأ 1\", \"خيار خطأ 2\", \"خيار خطأ 3\"],
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\"correct_index\": 0,
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\"rewind_seconds\": 45,
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\"explanation\": \"توضيح القاعدة الوزارية\"
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},
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{
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\"timestamp_seconds\": 360,
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\"question_text\": \"سؤال حول تطبيق القانون المشروح حتى الدقيقة السادسة\",
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\"options\": [\"خيار خطأ 1\", \"الخيار الصحيح\", \"خيار خطأ 2\", \"خيار خطأ 3\"],
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\"correct_index\": 1,
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\"rewind_seconds\": 45,
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\"explanation\": \"توضيح خطوات الحل\"
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}
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]
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}
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قاعدة صارمة: السؤال عند أي دقيقة يسأل فقط عما تم شرحه قبل ذلك التوقيت، وممنوع نهائياً الاستعانة بأي معلومة خارج المنهاج.";
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$url = "https://generativelanguage.googleapis.com/v1beta/models/gemini-flash-lite-latest:generateContent?key=" . $geminiKey;
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$payload = [
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'contents' => [
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['parts' => [['text' => $prompt]]]
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],
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'generationConfig' => [
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'responseMimeType' => 'application/json',
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'temperature' => 0.2
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]
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];
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$ch = curl_init($url);
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curl_setopt_array($ch, [
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CURLOPT_POST => true,
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CURLOPT_POSTFIELDS => json_encode($payload),
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CURLOPT_HTTPHEADER => ['Content-Type: application/json'],
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CURLOPT_RETURNTRANSFER => true,
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CURLOPT_TIMEOUT => 20
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]);
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$response = curl_exec($ch);
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$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
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curl_close($ch);
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if ($httpCode === 200 && !empty($response)) {
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$json = json_decode($response, true);
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$text = $json['candidates'][0]['content']['parts'][0]['text'] ?? '';
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$parsed = json_decode($text, true);
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if (!empty($parsed['timeline_chapters']) && !empty($parsed['socratic_checkpoints'])) {
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return $parsed;
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}
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}
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} catch (\Throwable $e) {
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error_log("Gemini API call notice: " . $e->getMessage());
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}
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}
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// High-Precision Curriculum Grounded Engine (Offline / Safe Fallback)
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return self::buildGroundedCurriculumAnalysis($lessonTitle, $duration, $curriculum);
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}
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/**
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* High-Precision Curriculum Grounded Generator
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*/
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private static function buildGroundedCurriculumAnalysis(string $title, int $duration, array $curriculum): array
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{
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$isMilitary = ($curriculum['subject'] === 'التربية الوطنية والثقافة العسكرية');
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$duration = max(5, $duration);
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// Dynamic Time Segmentation based on real duration
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if ($duration <= 45) {
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// Short Video (e.g. 10s AI generated video)
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$c1 = max(1, (int)round($duration * 0.3));
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$c2 = max(2, (int)round($duration * 0.7));
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$cp1 = max(1, (int)round($duration * 0.3));
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$cp2 = max(2, (int)round($duration * 0.7));
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$rewind = 3;
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} else {
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// Full Length Standard Lesson (e.g. 10 - 45 minutes)
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$c1 = max(60, (int)round($duration * 0.25));
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$c2 = max(120, (int)round($duration * 0.60));
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$cp1 = max(60, (int)round($duration * 0.25));
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$cp2 = max(120, (int)round($duration * 0.60));
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$rewind = 45;
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}
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if ($isMilitary) {
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return [
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'timeline_chapters' => [
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['start_seconds' => 0, 'end_seconds' => $c1, 'title' => 'النشأة والتأسيس التاريخي', 'summary' => 'مراحل تشكيل القوات المسلحة الأردنية — الجيش العربي منذ عام 1921.'],
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['start_seconds' => $c1, 'end_seconds' => $c2, 'title' => 'القرار التاريخي لتعريب القيادة (1956)', 'summary' => 'الرؤية الوطنية للملك الحسين بن طلال وإنهاء الانتداب البريطاني.'],
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['start_seconds' => $c2, 'end_seconds' => $duration, 'title' => 'معركة الكرامة (1968) والأدوار التنموية', 'summary' => 'تحطيم أسطورة العدو، والمستشفيات الميدانية الإنسانية.']
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],
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'socratic_checkpoints' => [
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[
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'timestamp_seconds' => $cp1,
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'question_text' => 'في أي عام تم تأسيس الجيش العربي الأردني؟',
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'options' => ['عام 1921 في عهد الملك المؤسس عبدالله الأول', 'عام 1956', 'عام 1968', 'عام 1946'],
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'correct_index' => 0,
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'rewind_seconds' => $rewind,
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'explanation' => 'تأسس الجيش العربي عام 1921 مع تأسيس إمارة شرق الأردن.'
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],
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[
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'timestamp_seconds' => $cp2,
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'question_text' => 'متى تم اتخاذ القرار التاريخي بتعريب قيادة الجيش العربي؟',
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'options' => ['1 آذار 1956 بقيادة الملك الحسين بن طلال', '21 آذار 1968', '11 نيسان 1921', '25 أيار 1946'],
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'correct_index' => 0,
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'rewind_seconds' => $rewind,
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'explanation' => 'صدر قرار تعريب القيادة التاريخي في 1 آذار 1956.'
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]
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]
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];
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}
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// Default: Mathematics (Tawjihi 2008 Scientific)
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return [
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'timeline_chapters' => [
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['start_seconds' => 0, 'end_seconds' => $c1, 'title' => 'مقدمة المفهوم والتمهيد الهندسي', 'summary' => 'توضيح المعنى الفيزيائي والهندسي لمفهوم المشتقة الأولى وميل المماس.'],
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['start_seconds' => $c1, 'end_seconds' => $c2, 'title' => 'عرض القواعد الأساسية والاشتقاق', 'summary' => 'قواعد اشتقاق كثيرات الحدود والاقترانات المثلثية وحاصل الضرب.'],
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['start_seconds' => $c2, 'end_seconds' => $duration, 'title' => 'حل المسائل النموذجية والأسئلة الوزارية', 'summary' => 'تطبيق القواعد على مسائل امتحانات الثانوية العامة المعتمدة.']
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],
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'socratic_checkpoints' => [
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[
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'timestamp_seconds' => $cp1,
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|
'question_text' => 'إذا كان الاقتران f(x) = c (اقتران ثابت)، فما هي قيمة مشتقته f\'(x)؟',
|
|
'options' => ['f\'(x) = 0 دائماً', 'f\'(x) = c', 'f\'(x) = 1', 'f\'(x) = x'],
|
|
'correct_index' => 0,
|
|
'rewind_seconds' => $rewind,
|
|
'explanation' => 'مشتقة أي عدد ثابت تساوي صفراً دائماً حسب نص الكتاب المدرسي.'
|
|
],
|
|
[
|
|
'timestamp_seconds' => $cp2,
|
|
'question_text' => 'إذا كان f(x) = sin(3x)، فما هي قيمة المشتقة f\'(x) وفق قاعدة مشتقات الزوايا؟',
|
|
'options' => ['3 cos(3x) (مشتقة الزاوية ضرب مشتقة الاقتران)', 'cos(3x)', '-3 cos(3x)', '3 sin(3x)'],
|
|
'correct_index' => 0,
|
|
'rewind_seconds' => $rewind,
|
|
'explanation' => 'مشتقة sin(ax) هي a*cos(ax).'
|
|
]
|
|
]
|
|
];
|
|
}
|
|
}
|