18d0a74348
- Users can share/unshare their flashcard decks (toggle button) - Shared tab: paginated list of all shared decks sorted by avg rating - Star rating system (1-5): click stars to rate, updates average live - Each user can rate each shared deck once (upsert on re-rate) - Admin can force-unshare any deck (remove from shared listing) - Shared decks are study-able by anyone (read-only access) - Owner name displayed on shared deck cards - Load more button for shared decks (12 per page) - New DB table: flashcard_deck_ratings (user_id+deck_id unique) - New column: flashcard_decks.is_shared (default 0) Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
432 lines
19 KiB
Python
432 lines
19 KiB
Python
import os
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from contextlib import asynccontextmanager
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from fastapi import FastAPI
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from fastapi.middleware.cors import CORSMiddleware
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from fastapi.staticfiles import StaticFiles
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from app.config import settings
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from app.database import engine, Base, SessionLocal
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from app.routers import auth, documents, quizzes, attempts, admin, tts, nextcloud, categories, questions, question_categories, favorites, teach, contact, tags, flashcards
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from app.utils.auth import get_password_hash
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from app.utils.scheduler import start_scheduler, stop_scheduler
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def seed_admin():
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"""Create default admin user if none exists."""
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from app.models.user import User
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from app.models.email_verification import EmailVerification
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from app.models.password_reset import PasswordReset
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db = SessionLocal()
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try:
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admin_exists = db.query(User).filter(User.role == "admin").first()
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if not admin_exists:
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admin_user = User(
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email="admin@quizapp.com",
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hashed_password=get_password_hash("admin123"),
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name="Admin",
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role="admin",
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)
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db.add(admin_user)
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db.flush()
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# Auto-verify seeded admin
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from datetime import datetime
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db.add(EmailVerification(
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user_id=admin_user.id,
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token="seeded",
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expires_at=datetime.utcnow(),
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verified_at=datetime.utcnow(),
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))
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db.commit()
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else:
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# Ensure existing admin has a verified email record
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from app.models.email_verification import EmailVerification
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from datetime import datetime
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existing_v = db.query(EmailVerification).filter(EmailVerification.user_id == admin_exists.id).first()
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if not existing_v:
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db.add(EmailVerification(
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user_id=admin_exists.id,
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token=f"legacy_{admin_exists.id}",
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expires_at=datetime.utcnow(),
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verified_at=datetime.utcnow(),
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))
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db.commit()
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finally:
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db.close()
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def seed_default_models():
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"""Seed default AI model configs if none exist."""
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from app.models.ai_model_config import AIModelConfig
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db = SessionLocal()
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try:
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if db.query(AIModelConfig).count() == 0:
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defaults = [
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AIModelConfig(name="Claude Haiku 4.5", model_id="claude-haiku-4.5", task="extraction", is_active=True, is_default=True),
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AIModelConfig(name="Claude Sonnet 4.6", model_id="claude-sonnet-4.6", task="extraction", is_active=True, is_default=False),
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AIModelConfig(name="Gemini 2.5 Flash", model_id="gemini-2.5-flash", task="extraction", is_active=True, is_default=False),
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]
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db.add_all(defaults)
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db.commit()
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# Clean up legacy titan-embed-v2 "general" entry (was mistakenly seeded)
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titan = db.query(AIModelConfig).filter(
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AIModelConfig.model_id == "titan-embed-v2",
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AIModelConfig.task == "general",
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).first()
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if titan:
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db.delete(titan)
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db.commit()
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# Always ensure OpenAI TTS voice models exist (idempotent)
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tts_voices = [
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# OpenAI (work with OPENAI_API_KEY)
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("OpenAI Alloy", "tts-1:alloy", True),
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("OpenAI Nova", "tts-1:nova", False),
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("OpenAI Echo", "tts-1:echo", False),
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("OpenAI Shimmer", "tts-1:shimmer", False),
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("OpenAI Onyx", "tts-1:onyx", False),
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("OpenAI Fable", "tts-1:fable", False),
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("OpenAI Alloy HD", "tts-1-hd:alloy", False),
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("OpenAI Nova HD", "tts-1-hd:nova", False),
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# ElevenLabs (work with ELEVENLABS_API_KEY)
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("ElevenLabs Adam", "elevenlabs/adam", False),
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# Google Cloud TTS (work with GOOGLE_TTS_API_KEY)
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("Google Wavenet F (en-US)", "google/en-US-Wavenet-F", False),
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("Google Wavenet D (en-US)", "google/en-US-Wavenet-D", False),
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("Google Studio O (en-US)", "google/en-US-Studio-O", False),
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("Google Studio Q (en-US)", "google/en-US-Studio-Q", False),
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("Google Chirp 3 HD (en-US)", "google/en-US-Chirp3-HD-Aoede", False),
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# AWS Polly Neural (work with AWS_ACCESS_KEY_ID + AWS_SECRET_ACCESS_KEY)
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("AWS Polly Joanna (en-US)", "polly/Joanna", False),
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("AWS Polly Matthew (en-US)", "polly/Matthew", False),
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("AWS Polly Amy (en-GB)", "polly/Amy", False),
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("AWS Polly Brian (en-GB)", "polly/Brian", False),
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]
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# Deactivate old generic tts-1 / tts-1-hd entries (no voice encoded)
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for old_id in ("tts-1", "tts-1-hd"):
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old = db.query(AIModelConfig).filter(AIModelConfig.model_id == old_id).first()
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if old:
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old.is_active = False
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old.is_default = False
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has_default_tts = db.query(AIModelConfig).filter(
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AIModelConfig.task == "tts", AIModelConfig.is_default == True, AIModelConfig.is_active == True,
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).first() is not None
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for name, model_id, _ in tts_voices:
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exists = db.query(AIModelConfig).filter(AIModelConfig.model_id == model_id).first()
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if not exists:
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is_def = not has_default_tts
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db.add(AIModelConfig(name=name, model_id=model_id, task="tts", is_active=True, is_default=is_def))
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if is_def:
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has_default_tts = True
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db.commit()
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finally:
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db.close()
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def setup_pgvector():
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"""Enable pgvector, add new columns/tables, run schema migrations."""
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from sqlalchemy import text
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# Import new models so create_all picks them up
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from app.models import quiz_category, quiz_question_link, question_category, favorite # noqa
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from app.models import flashcard # noqa
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# Kill stale idle-in-transaction connections from previous killed startups.
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# They hold DDL locks and cause ALTER TABLE below to hang indefinitely.
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with engine.connect() as conn:
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conn.execute(text("""
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SELECT pg_terminate_backend(pid)
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FROM pg_stat_activity
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WHERE datname = current_database()
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AND state = 'idle in transaction'
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AND query_start < NOW() - INTERVAL '30 seconds'
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AND pid != pg_backend_pid()
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"""))
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conn.commit()
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# Retry schema migration up to 3 times — Celery tasks may hold locks briefly
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for attempt in range(3):
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try:
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with engine.connect() as conn:
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conn.execute(text("SET lock_timeout = '15s'"))
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conn.execute(text("CREATE EXTENSION IF NOT EXISTS vector"))
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conn.execute(text("ALTER TABLE questions ADD COLUMN IF NOT EXISTS embedding vector(1024)"))
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conn.commit()
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break
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except Exception as e:
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if attempt < 2 and "lock" in str(e).lower():
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import logging; logging.getLogger(__name__).warning(f"Schema migration lock timeout (attempt {attempt+1}/3), retrying in 5s...")
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import time; time.sleep(5)
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continue
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raise
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with engine.connect() as conn:
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conn.execute(text("SET lock_timeout = '15s'"))
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conn.execute(text("""
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CREATE INDEX IF NOT EXISTS questions_embedding_hnsw
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ON questions USING hnsw (embedding vector_cosine_ops)
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"""))
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# Quiz categories
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conn.execute(text("""
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CREATE TABLE IF NOT EXISTS quiz_categories (
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id SERIAL PRIMARY KEY,
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name VARCHAR NOT NULL,
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user_id INTEGER REFERENCES users(id),
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created_at TIMESTAMP DEFAULT NOW()
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)
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"""))
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conn.execute(text("""
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ALTER TABLE quizzes
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ADD COLUMN IF NOT EXISTS category_id INTEGER REFERENCES quiz_categories(id) ON DELETE SET NULL
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"""))
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# Question categories (separate from quiz categories)
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conn.execute(text("""
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CREATE TABLE IF NOT EXISTS question_categories (
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id SERIAL PRIMARY KEY,
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name VARCHAR NOT NULL,
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description TEXT,
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user_id INTEGER REFERENCES users(id),
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created_at TIMESTAMP DEFAULT NOW()
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)
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"""))
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conn.execute(text("""
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ALTER TABLE questions
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ADD COLUMN IF NOT EXISTS question_category_id INTEGER
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REFERENCES question_categories(id) ON DELETE SET NULL
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"""))
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# Fix email collation to avoid en_US.utf8 B-tree index corruption
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conn.execute(text('ALTER TABLE users ALTER COLUMN email TYPE varchar COLLATE "C"'))
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# Fix: section deletion must not cascade-delete quizzes
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conn.execute(text("ALTER TABLE quizzes ALTER COLUMN section_id DROP NOT NULL"))
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try:
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conn.execute(text("ALTER TABLE quizzes DROP CONSTRAINT IF EXISTS quizzes_section_id_fkey"))
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conn.execute(text("ALTER TABLE quizzes ADD CONSTRAINT quizzes_section_id_fkey FOREIGN KEY (section_id) REFERENCES sections(id) ON DELETE SET NULL"))
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except Exception as e:
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import logging
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logging.getLogger(__name__).debug(f"FK constraint migration (may already exist): {e}")
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# Soft delete + publish control for quizzes
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conn.execute(text("ALTER TABLE quizzes ADD COLUMN IF NOT EXISTS deleted_at TIMESTAMP"))
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conn.execute(text("ALTER TABLE quizzes ADD COLUMN IF NOT EXISTS is_published INTEGER DEFAULT 1"))
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# Junction table: quiz ↔ question many-to-many
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conn.execute(text("""
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CREATE TABLE IF NOT EXISTS quiz_question_links (
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quiz_id INTEGER NOT NULL REFERENCES quizzes(id) ON DELETE CASCADE,
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question_id INTEGER NOT NULL REFERENCES questions(id) ON DELETE CASCADE,
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position INTEGER DEFAULT 0,
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PRIMARY KEY (quiz_id, question_id)
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)
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"""))
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# Populate junction from existing questions (idempotent via ON CONFLICT DO NOTHING)
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conn.execute(text("""
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INSERT INTO quiz_question_links (quiz_id, question_id, position)
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SELECT quiz_id, id,
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ROW_NUMBER() OVER (PARTITION BY quiz_id ORDER BY id) - 1
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FROM questions
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WHERE quiz_id IS NOT NULL
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ON CONFLICT DO NOTHING
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"""))
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# Make quiz_id on questions nullable (it becomes informational "source_quiz_id")
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conn.execute(text("ALTER TABLE questions ALTER COLUMN quiz_id DROP NOT NULL"))
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# Favorites table
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conn.execute(text("""
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CREATE TABLE IF NOT EXISTS favorites (
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id SERIAL PRIMARY KEY,
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user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
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question_id INTEGER NOT NULL REFERENCES questions(id) ON DELETE CASCADE,
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created_at TIMESTAMP DEFAULT NOW(),
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UNIQUE(user_id, question_id)
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)
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"""))
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# Unthrottle flag for users (exempt from AI/TTS rate limits)
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conn.execute(text("ALTER TABLE users ADD COLUMN IF NOT EXISTS is_unthrottled INTEGER DEFAULT 0"))
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# Contact form submissions table
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conn.execute(text("""
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CREATE TABLE IF NOT EXISTS contact_submissions (
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id SERIAL PRIMARY KEY,
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name VARCHAR(120) NOT NULL,
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email VARCHAR NOT NULL,
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type VARCHAR NOT NULL,
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message TEXT NOT NULL,
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read INTEGER DEFAULT 0,
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created_at TIMESTAMP DEFAULT NOW()
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)
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"""))
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# AI question tags (subjects, diseases, keywords)
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conn.execute(text("""
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CREATE TABLE IF NOT EXISTS question_tags (
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id SERIAL PRIMARY KEY,
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name VARCHAR(200) NOT NULL,
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type VARCHAR(50) NOT NULL,
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created_at TIMESTAMP DEFAULT NOW()
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)
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"""))
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conn.execute(text("""
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CREATE UNIQUE INDEX IF NOT EXISTS uq_tag_name_type ON question_tags(LOWER(name), type)
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"""))
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conn.execute(text("""
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CREATE TABLE IF NOT EXISTS question_tag_links (
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question_id INTEGER REFERENCES questions(id) ON DELETE CASCADE,
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tag_id INTEGER REFERENCES question_tags(id) ON DELETE CASCADE,
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PRIMARY KEY (question_id, tag_id)
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)
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"""))
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# Flashcard decks and cards
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conn.execute(text("""
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CREATE TABLE IF NOT EXISTS flashcard_decks (
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id SERIAL PRIMARY KEY,
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title VARCHAR NOT NULL,
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section_id INTEGER REFERENCES sections(id) ON DELETE SET NULL,
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user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
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card_count INTEGER DEFAULT 0,
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created_at TIMESTAMP DEFAULT NOW()
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)
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"""))
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conn.execute(text("""
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CREATE TABLE IF NOT EXISTS flashcards (
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id SERIAL PRIMARY KEY,
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deck_id INTEGER NOT NULL REFERENCES flashcard_decks(id) ON DELETE CASCADE,
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front TEXT NOT NULL,
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back TEXT NOT NULL,
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page_reference INTEGER,
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image_path VARCHAR,
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created_at TIMESTAMP DEFAULT NOW()
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)
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"""))
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conn.execute(text("""
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CREATE TABLE IF NOT EXISTS flashcard_tag_links (
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flashcard_id INTEGER NOT NULL REFERENCES flashcards(id) ON DELETE CASCADE,
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tag_id INTEGER NOT NULL REFERENCES question_tags(id) ON DELETE CASCADE,
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PRIMARY KEY (flashcard_id, tag_id)
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)
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"""))
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# Soft-delete + sharing for flashcard decks
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conn.execute(text("ALTER TABLE flashcard_decks ADD COLUMN IF NOT EXISTS deleted_at TIMESTAMP"))
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conn.execute(text("ALTER TABLE flashcard_decks ADD COLUMN IF NOT EXISTS is_shared INTEGER DEFAULT 0"))
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# Deck ratings
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conn.execute(text("""
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CREATE TABLE IF NOT EXISTS flashcard_deck_ratings (
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id SERIAL PRIMARY KEY,
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deck_id INTEGER NOT NULL REFERENCES flashcard_decks(id) ON DELETE CASCADE,
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user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
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rating INTEGER NOT NULL CHECK (rating >= 1 AND rating <= 5),
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created_at TIMESTAMP DEFAULT NOW(),
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UNIQUE (user_id, deck_id)
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)
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"""))
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conn.commit()
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def backfill_embeddings():
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"""Generate embeddings for questions that don't have one yet (background, best-effort)."""
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import threading
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from app.models.question import Question
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from app.services import embedding_service
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def _run():
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db = SessionLocal()
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try:
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missing = db.query(Question).filter(Question.embedding.is_(None)).all()
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if not missing:
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return
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import logging
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log = logging.getLogger(__name__)
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log.info(f"Backfilling embeddings for {len(missing)} questions...")
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ok = 0
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for q in missing:
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try:
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if embedding_service.embed_question(q):
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ok += 1
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except Exception as e:
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log.warning(f"Embedding failed for question {q.id}: {e}")
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db.commit()
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log.info(f"Backfill complete: {ok}/{len(missing)} embedded")
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except Exception as e:
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import logging
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logging.getLogger(__name__).warning(f"Embedding backfill failed: {e}")
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finally:
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db.close()
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threading.Thread(target=_run, daemon=True).start()
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def _acquire_singleton_lock() -> bool:
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"""Returns True if this worker wins the startup lock for singleton tasks (scheduler, backfill).
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Uses Redis SETNX with a 5-minute TTL. Degrades gracefully if Redis is unavailable."""
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try:
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import redis as redis_lib
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r = redis_lib.from_url(settings.REDIS_URL, decode_responses=True, socket_connect_timeout=2)
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return bool(r.set("startup:singleton_lock", "1", nx=True, ex=300))
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except Exception:
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return True # Redis unavailable — assume single worker, run everything
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@asynccontextmanager
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async def lifespan(app: FastAPI):
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# Startup — all workers run DDL/seeds (idempotent), only one runs scheduler/backfill
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Base.metadata.create_all(bind=engine)
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setup_pgvector()
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os.makedirs(settings.UPLOAD_DIR, exist_ok=True)
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os.makedirs(os.path.join(settings.UPLOAD_DIR, "images"), exist_ok=True)
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os.makedirs(settings.CHROMA_PERSIST_DIR, exist_ok=True)
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seed_admin()
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seed_default_models()
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# Scheduler and backfill must only run in one worker to avoid duplicate jobs / race conditions
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is_primary = _acquire_singleton_lock()
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if is_primary:
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backfill_embeddings()
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start_scheduler()
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yield
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# Shutdown
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if is_primary:
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stop_scheduler()
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app = FastAPI(
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title="PedsHub",
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description="Pediatric Knowledge Quiz Platform",
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version="2.0.0",
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lifespan=lifespan,
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)
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app.add_middleware(
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CORSMiddleware,
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allow_origins=["https://quiz.danvics.com", "https://pedshub.com", "https://www.pedshub.com"],
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allow_credentials=True,
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allow_methods=["*"],
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allow_headers=["*"],
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expose_headers=["X-New-Token"], # Allow frontend to read this header
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)
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# Add token refresh middleware AFTER CORS (middleware applies in reverse)
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from app.utils.auth import TokenRefreshMiddleware
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app.add_middleware(TokenRefreshMiddleware)
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# Serve uploaded images as static files
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app.mount("/uploads", StaticFiles(directory=settings.UPLOAD_DIR), name="uploads")
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app.include_router(auth.router, prefix="/api/auth", tags=["auth"])
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app.include_router(documents.router, prefix="/api/documents", tags=["documents"])
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app.include_router(quizzes.router, prefix="/api/quizzes", tags=["quizzes"])
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app.include_router(attempts.router, prefix="/api/attempts", tags=["attempts"])
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app.include_router(admin.router, prefix="/api/admin", tags=["admin"])
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app.include_router(tts.router, prefix="/api/tts", tags=["tts"])
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app.include_router(nextcloud.router, prefix="/api/nextcloud", tags=["nextcloud"])
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app.include_router(categories.router, prefix="/api/categories", tags=["categories"])
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app.include_router(questions.router, prefix="/api/questions", tags=["questions"])
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app.include_router(question_categories.router, prefix="/api/question-categories", tags=["question-categories"])
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app.include_router(favorites.router, prefix="/api/favorites", tags=["favorites"])
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app.include_router(teach.router, prefix="/api/teach", tags=["teach"])
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app.include_router(contact.router, prefix="/api/contact", tags=["contact"])
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app.include_router(tags.router, prefix="/api/tags", tags=["tags"])
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app.include_router(flashcards.router, prefix="/api/flashcards", tags=["flashcards"])
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@app.get("/api/health")
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def health_check():
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return {"status": "ok"}
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