377 lines
13 KiB
Python
377 lines
13 KiB
Python
import os
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import time
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import json
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import sqlite3
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import threading
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import random
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import tempfile
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import subprocess
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import sys
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import traceback
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import io
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from pathlib import Path
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try:
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from watchdog.observers import Observer
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from watchdog.events import FileSystemEventHandler
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WATCHDOG_AVAILABLE = True
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except ImportError:
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WATCHDOG_AVAILABLE = False
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PROBLEMS_DIR = Path(__file__).parent / 'problems'
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DB_PATH = Path(__file__).parent / 'problems.sqlite3'
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class ProblemScannerThread(threading.Thread):
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def __init__(self, scan_interval=2):
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super().__init__(daemon=True)
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self.scan_interval = scan_interval
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self.last_state = {}
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self.observer = None
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def create_table(self, conn):
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c = conn.cursor()
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c.execute('PRAGMA journal_mode=WAL;')
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c.execute('''CREATE TABLE IF NOT EXISTS problems (
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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folder TEXT,
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description TEXT,
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test_code TEXT
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)''')
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conn.commit()
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def scan(self):
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problems = []
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if not PROBLEMS_DIR.exists():
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print(f"Problems directory does not exist: {PROBLEMS_DIR}")
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return problems
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for folder in PROBLEMS_DIR.iterdir():
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if folder.is_dir():
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# Dynamically find manifest file (manifest.json or manifets.json)
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manifest_path = None
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for candidate in ["manifest.json", "manifets.json"]:
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candidate_path = folder / candidate
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if candidate_path.exists():
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manifest_path = candidate_path
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break
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desc_path = folder / 'description.md'
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test_path = folder / 'test.py'
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# Check if required files exist
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if manifest_path and desc_path.exists() and test_path.exists():
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try:
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with open(desc_path, 'r', encoding='utf-8') as f:
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description = f.read()
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with open(test_path, 'r', encoding='utf-8') as f:
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test_code = f.read()
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problems.append({
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'folder': folder.name,
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'description': description,
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'test_code': test_code
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})
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print(f"Found problem: {folder.name}")
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except Exception as e:
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print(f"Error reading problem files for {folder.name}: {e}")
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else:
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missing_files = []
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if not manifest_path:
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missing_files.append("manifest.json/manifets.json")
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if not desc_path.exists():
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missing_files.append("description.md")
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if not test_path.exists():
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missing_files.append("test.py")
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print(f"Skipping {folder.name}: missing {', '.join(missing_files)}")
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print(f"Total problems found: {len(problems)}")
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return problems
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def update_db(self, problems, retries=5):
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for attempt in range(retries):
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try:
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conn = sqlite3.connect(DB_PATH, timeout=5)
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c = conn.cursor()
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c.execute('PRAGMA journal_mode=WAL;')
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# Clear existing problems
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c.execute('DELETE FROM problems')
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# Insert new problems
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for p in problems:
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c.execute('INSERT INTO problems (folder, description, test_code) VALUES (?, ?, ?)',
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(p['folder'], p['description'], p['test_code']))
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conn.commit()
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print(f"Updated database with {len(problems)} problems")
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conn.close()
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return
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except sqlite3.OperationalError as e:
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if 'locked' in str(e).lower():
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wait_time = 0.2 + random.random() * 0.3
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print(f"Database locked, retrying in {wait_time:.2f}s (attempt {attempt + 1})")
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time.sleep(wait_time)
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else:
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print(f"Database error: {e}")
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raise
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except Exception as e:
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print(f"Unexpected error updating database: {e}")
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raise
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print('Failed to update problems DB after several retries due to lock.')
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def rescan_and_update(self):
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print("Scanning for problems...")
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problems = self.scan()
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self.update_db(problems)
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def run(self):
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print("Starting problem scanner...")
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# Initial scan and table creation
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try:
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conn = sqlite3.connect(DB_PATH)
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self.create_table(conn)
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conn.close()
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print("Database initialized")
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except Exception as e:
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print(f"Failed to initialize database: {e}")
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return
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# Initial scan
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self.rescan_and_update()
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if WATCHDOG_AVAILABLE:
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print("Using watchdog for file monitoring")
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class Handler(FileSystemEventHandler):
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def __init__(self, scanner):
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self.scanner = scanner
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self.last_event_time = 0
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def on_any_event(self, event):
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# Debounce events to avoid too many rescans
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now = time.time()
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if now - self.last_event_time > 1: # Wait at least 1 second between rescans
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self.last_event_time = now
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print(f"File system event: {event.event_type} - {event.src_path}")
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self.scanner.rescan_and_update()
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event_handler = Handler(self)
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self.observer = Observer()
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self.observer.schedule(event_handler, str(PROBLEMS_DIR), recursive=True)
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self.observer.start()
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try:
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while True:
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time.sleep(1)
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except KeyboardInterrupt:
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print("Stopping problem scanner...")
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finally:
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self.observer.stop()
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self.observer.join()
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else:
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print(f"Watchdog not available, using polling every {self.scan_interval}s")
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# Fallback: poll every scan_interval seconds
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try:
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while True:
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time.sleep(self.scan_interval)
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self.rescan_and_update()
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except KeyboardInterrupt:
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print("Stopping problem scanner...")
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def start_problem_scanner():
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scanner = ProblemScannerThread()
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scanner.start()
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return scanner
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# Flask model loading functions
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def load_problems_from_json(json_path):
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"""Load problems from JSON file into Flask database"""
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if not os.path.exists(json_path):
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print(f"Problem JSON file not found: {json_path}")
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return
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try:
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with open(json_path, 'r', encoding='utf-8') as f:
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problems = json.load(f)
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except Exception as e:
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print(f"Error reading JSON file: {e}")
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return
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# This assumes you have imported the necessary Flask/SQLAlchemy components
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try:
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from models import db, Problem
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for p in problems:
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# Check if problem already exists by title
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existing = Problem.query.filter_by(title=p['title']).first()
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# Load test code from solution file if provided
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test_code = ''
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if 'solution' in p and os.path.exists(p['solution']):
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try:
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with open(p['solution'], 'r', encoding='utf-8') as sf:
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test_code = sf.read()
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except Exception as e:
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print(f"Error reading solution file for {p['title']}: {e}")
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if existing:
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existing.description = p['description']
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existing.test_code = test_code
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print(f"Updated problem: {p['title']}")
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else:
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new_problem = Problem(title=p['title'], description=p['description'], test_code=test_code)
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db.session.add(new_problem)
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print(f"Added new problem: {p['title']}")
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db.session.commit()
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print("Successfully updated problems from JSON")
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except ImportError:
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print("Flask models not available - skipping JSON load")
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except Exception as e:
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print(f"Error loading problems from JSON: {e}")
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def schedule_problem_reload(app, json_path, interval_hours=10):
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"""Schedule periodic reloading of problems from JSON"""
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def reload_loop():
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while True:
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try:
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with app.app_context():
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load_problems_from_json(json_path)
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time.sleep(interval_hours * 3600)
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except Exception as e:
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print(f"Error in problem reload loop: {e}")
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time.sleep(60) # Wait 1 minute before retrying
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t = threading.Thread(target=reload_loop, daemon=True)
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t.start()
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def run_code_against_tests(user_code, test_code, timeout=10):
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"""
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Execute user code against test code with proper error handling.
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Args:
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user_code: The user's solution code
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test_code: The test code to validate the solution
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timeout: Maximum execution time in seconds
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Returns:
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dict: Result with passed, output, runtime, and error fields
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"""
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if not user_code or not user_code.strip():
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return {
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'passed': False,
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'output': '',
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'runtime': 0,
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'error': 'No code provided'
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}
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if not test_code or not test_code.strip():
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return {
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'passed': False,
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'output': '',
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'runtime': 0,
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'error': 'No test code available'
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}
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start_time = time.perf_counter()
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output = ''
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error = None
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passed = False
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temp_file = None
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try:
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# Check if unittest is used in test_code
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if 'unittest' in test_code:
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# Create temporary file with user code + test code
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with tempfile.NamedTemporaryFile('w+', suffix='.py', delete=False, encoding='utf-8') as f:
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# Combine user code and test code
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combined_code = f"{user_code}\n\n{test_code}"
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f.write(combined_code)
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f.flush()
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temp_file = f.name
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try:
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# Run the file as a subprocess with timeout
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proc = subprocess.run(
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[sys.executable, temp_file],
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capture_output=True,
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text=True,
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timeout=timeout,
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encoding='utf-8'
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)
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output = proc.stdout
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if proc.stderr:
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output += f"\nSTDERR:\n{proc.stderr}"
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passed = proc.returncode == 0
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if not passed:
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error = f"Tests failed. Return code: {proc.returncode}\n{output}"
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except subprocess.TimeoutExpired:
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passed = False
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error = f"Code execution timed out after {timeout} seconds"
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output = "Execution timed out"
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else:
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# Direct execution approach for simple assert-based tests
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local_ns = {}
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# Capture stdout
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old_stdout = sys.stdout
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captured_output = io.StringIO()
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sys.stdout = captured_output
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try:
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# Execute user code first
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exec(user_code, {}, local_ns)
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# Execute test code in the same namespace
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exec(test_code, local_ns, local_ns)
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# If we get here without exceptions, tests passed
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passed = True
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except AssertionError as e:
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passed = False
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error = f"Assertion failed: {str(e)}"
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except Exception as e:
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passed = False
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error = f"Runtime error: {traceback.format_exc()}"
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finally:
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output = captured_output.getvalue()
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sys.stdout = old_stdout
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except Exception as e:
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passed = False
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error = f"Execution error: {traceback.format_exc()}"
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finally:
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# Clean up temporary file
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if temp_file and os.path.exists(temp_file):
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try:
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os.unlink(temp_file)
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except Exception as e:
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print(f"Warning: Could not delete temp file {temp_file}: {e}")
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runtime = time.perf_counter() - start_time
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result = {
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'passed': passed,
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'output': output.strip() if output else '',
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'runtime': runtime,
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'error': error if not passed else None
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}
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print(f"Test execution result: passed={passed}, runtime={runtime:.3f}s")
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if error:
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print(f"Error: {error}")
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return result
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