Maxim Dolgolyov
be4d43105e
Node.js/Express backend + vanilla JS frontend. Features: real-time collaborative whiteboard (SSE), multi-page support, LaTeX formulas, shapes/connectors, coordinate systems, number lines, compass, zoom/pan, Catmull-Rom pencil smoothing, ruler/protractor with rotation & resize controls, minimap navigation overlay, auto-measurements, multi-page thumbnails sidebar, PNG export, page templates. Student/teacher workflows: classes, assignments, library, dashboard. Mobile responsive. SQLite (better-sqlite3). Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
70 lines
2.4 KiB
JavaScript
70 lines
2.4 KiB
JavaScript
'use strict';
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const db = require('../db/db');
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function _tier(total, correct) {
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if (total === 0) return 'locked';
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const pct = correct / total * 100;
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if (total >= 10 && pct >= 90) return 'platinum';
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if (total >= 5 && pct >= 80) return 'gold';
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if (total >= 3 && pct >= 50) return 'silver';
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if (correct >= 1) return 'bronze';
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return 'locked';
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}
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/* ── GET /api/collection ──────────────────────────────────────────────── */
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function getCollection(req, res) {
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const rows = db.prepare(`
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SELECT
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t.id AS topic_id,
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t.name AS topic_name,
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s.name AS subject_name,
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s.slug AS subject_slug,
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s.icon AS subject_icon,
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COALESCE(agg.total_attempts, 0) AS total_attempts,
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COALESCE(agg.correct_count, 0) AS correct_count,
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agg.first_seen_at
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FROM topics t
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JOIN subjects s ON s.id = t.subject_id
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LEFT JOIN (
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SELECT q.topic_id,
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COUNT(ua.id) AS total_attempts,
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SUM(CASE WHEN ua.is_correct=1 THEN 1 ELSE 0 END) AS correct_count,
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MIN(ua.answered_at) AS first_seen_at
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FROM user_answers ua
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JOIN questions q ON q.id = ua.question_id
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WHERE ua.session_id IN (
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SELECT id FROM test_sessions WHERE user_id = ? AND status = 'completed'
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)
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GROUP BY q.topic_id
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) agg ON agg.topic_id = t.id
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ORDER BY s.slug, t.order_index, t.name
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`).all(req.user.id);
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const cards = rows.map(r => ({
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topicId: r.topic_id,
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topicName: r.topic_name,
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subjectName: r.subject_name,
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subjectSlug: r.subject_slug,
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subjectIcon: r.subject_icon,
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tier: _tier(r.total_attempts, r.correct_count),
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totalAttempts: r.total_attempts,
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correctCount: r.correct_count,
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masteryPct: r.total_attempts > 0 ? Math.round(r.correct_count / r.total_attempts * 100) : 0,
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firstSeenAt: r.first_seen_at || null,
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}));
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const unlocked = cards.filter(c => c.tier !== 'locked').length;
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res.json({
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totalTopics: cards.length,
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unlockedTopics: unlocked,
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platinumCount: cards.filter(c => c.tier === 'platinum').length,
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goldCount: cards.filter(c => c.tier === 'gold').length,
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silverCount: cards.filter(c => c.tier === 'silver').length,
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bronzeCount: cards.filter(c => c.tier === 'bronze').length,
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cards,
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});
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}
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module.exports = { getCollection };
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