Spaces:
Sleeping
Sleeping
File size: 8,727 Bytes
3595d5c ff87b10 3595d5c ff87b10 3595d5c ff87b10 3595d5c ff87b10 3595d5c ff87b10 3595d5c ff87b10 3595d5c ff87b10 3595d5c ff87b10 3595d5c ff87b10 3595d5c ff87b10 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 |
import sqlite3
import hashlib
import pandas as pd
from typing import Optional
import os
from threading import Lock
class DatabaseManager:
def __init__(self, db_path=":memory:"):
self.db_path = db_path
self._lock = Lock() # Thread safety
self.init_db()
def init_db(self):
"""Initialize database tables"""
with self._lock:
# Ensure directory exists if using file-based DB
if self.db_path != ":memory:":
os.makedirs(os.path.dirname(self.db_path), exist_ok=True)
conn = sqlite3.connect(self.db_path, check_same_thread=False)
cur = conn.cursor()
# Users table
cur.execute("""
CREATE TABLE IF NOT EXISTS users (
id INTEGER PRIMARY KEY AUTOINCREMENT,
username TEXT UNIQUE NOT NULL,
password_hash TEXT NOT NULL,
email TEXT,
created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
)
""")
# Transactions table
cur.execute("""
CREATE TABLE IF NOT EXISTS transactions (
id INTEGER PRIMARY KEY AUTOINCREMENT,
user_id INTEGER NOT NULL,
transaction_id TEXT,
timestamp TEXT,
amount REAL,
description TEXT,
merchant TEXT,
category TEXT,
is_flagged INTEGER DEFAULT 0,
risk_score REAL DEFAULT 0.0,
created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
FOREIGN KEY (user_id) REFERENCES users (id)
)
""")
conn.commit()
conn.close()
print(f"✅ Database initialized at: {self.db_path}")
def _hash_password(self, password: str) -> str:
"""Hash password using SHA256"""
return hashlib.sha256(password.encode('utf-8')).hexdigest()
def create_user(self, username: str, password: str, email: str = None) -> bool:
"""Create a new user"""
if not username or not password:
print("❌ Username and password required")
return False
try:
with self._lock:
conn = sqlite3.connect(self.db_path, check_same_thread=False)
cur = conn.cursor()
# Check if user already exists
cur.execute("SELECT id FROM users WHERE username = ?", (username,))
if cur.fetchone():
print(f"❌ User '{username}' already exists")
conn.close()
return False
# Create new user
pwd_hash = self._hash_password(password)
cur.execute(
"INSERT INTO users (username, password_hash, email) VALUES (?, ?, ?)",
(username, pwd_hash, email)
)
conn.commit()
user_id = cur.lastrowid
conn.close()
print(f"✅ User '{username}' created successfully with ID: {user_id}")
return True
except sqlite3.IntegrityError as e:
print(f"❌ Database integrity error: {e}")
return False
except Exception as e:
print(f"❌ Error creating user: {e}")
return False
def authenticate_user(self, username: str, password: str) -> Optional[int]:
"""Authenticate user and return user ID if successful"""
if not username or not password:
print("❌ Username and password required")
return None
try:
with self._lock:
conn = sqlite3.connect(self.db_path, check_same_thread=False)
cur = conn.cursor()
pwd_hash = self._hash_password(password)
print(f"🔍 Authenticating user: '{username}'")
print(f"🔑 Password hash: {pwd_hash[:10]}...")
cur.execute(
"SELECT id, username FROM users WHERE username = ? AND password_hash = ?",
(username, pwd_hash)
)
row = cur.fetchone()
conn.close()
if row:
user_id = row[0]
print(f"✅ Authentication successful for user '{username}' (ID: {user_id})")
return user_id
else:
# Debug: Check if user exists with different password
conn = sqlite3.connect(self.db_path, check_same_thread=False)
cur = conn.cursor()
cur.execute("SELECT id, password_hash FROM users WHERE username = ?", (username,))
debug_row = cur.fetchone()
conn.close()
if debug_row:
print(f"❌ User '{username}' exists but password incorrect")
print(f" Expected hash: {debug_row[1][:10]}...")
print(f" Provided hash: {pwd_hash[:10]}...")
else:
print(f"❌ User '{username}' not found")
return None
except Exception as e:
print(f"❌ Authentication error: {e}")
return None
def list_users(self):
"""Debug method to list all users"""
try:
with self._lock:
conn = sqlite3.connect(self.db_path, check_same_thread=False)
cur = conn.cursor()
cur.execute("SELECT id, username, email, created_at FROM users")
rows = cur.fetchall()
conn.close()
print("📋 All users in database:")
for row in rows:
print(f" ID: {row[0]}, Username: {row[1]}, Email: {row[2]}, Created: {row[3]}")
return rows
except Exception as e:
print(f"❌ Error listing users: {e}")
return []
def store_transactions(self, user_id: int, df: pd.DataFrame):
"""Store transactions for a user"""
try:
with self._lock:
conn = sqlite3.connect(self.db_path, check_same_thread=False)
df = df.copy()
df['user_id'] = user_id
# Ensure required columns exist
required_cols = ['transaction_id', 'timestamp', 'amount', 'description', 'merchant']
for col in required_cols:
if col not in df.columns:
df[col] = ''
df.to_sql('transactions', conn, if_exists='append', index=False)
conn.commit()
conn.close()
print(f"✅ Stored {len(df)} transactions for user {user_id}")
except Exception as e:
print(f"❌ Error storing transactions: {e}")
def get_transactions(self, user_id: int, days: int = 30):
"""Get transactions for a user"""
try:
with self._lock:
conn = sqlite3.connect(self.db_path, check_same_thread=False)
cur = conn.cursor()
cur.execute(
"SELECT * FROM transactions WHERE user_id = ? ORDER BY timestamp DESC",
(user_id,)
)
rows = cur.fetchall()
cols = [desc[0] for desc in cur.description]
conn.close()
return pd.DataFrame(rows, columns=cols)
except Exception as e:
print(f"❌ Error getting transactions: {e}")
return pd.DataFrame()
def reset_database(self):
"""Reset database (for testing)"""
try:
with self._lock:
conn = sqlite3.connect(self.db_path, check_same_thread=False)
cur = conn.cursor()
cur.execute("DROP TABLE IF EXISTS users")
cur.execute("DROP TABLE IF EXISTS transactions")
conn.commit()
conn.close()
self.init_db()
print("🔄 Database reset successfully")
except Exception as e:
print(f"❌ Error resetting database: {e}") |