211 lines
No EOL
8.4 KiB
Python
211 lines
No EOL
8.4 KiB
Python
import psycopg2
|
|
import psycopg2.extras
|
|
from typing import Optional, Dict, Any
|
|
import logging
|
|
import uuid
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
class DatabaseManager:
|
|
def __init__(self, config: Dict[str, Any]):
|
|
self.config = config
|
|
self.connection: Optional[psycopg2.extensions.connection] = None
|
|
|
|
def connect(self) -> bool:
|
|
try:
|
|
self.connection = psycopg2.connect(
|
|
host=self.config['host'],
|
|
port=self.config['port'],
|
|
database=self.config['database'],
|
|
user=self.config['username'],
|
|
password=self.config['password']
|
|
)
|
|
logger.info("PostgreSQL connection established successfully")
|
|
return True
|
|
except Exception as e:
|
|
logger.error(f"Failed to connect to PostgreSQL: {e}")
|
|
return False
|
|
|
|
def disconnect(self):
|
|
if self.connection:
|
|
self.connection.close()
|
|
self.connection = None
|
|
logger.info("PostgreSQL connection closed")
|
|
|
|
def is_connected(self) -> bool:
|
|
try:
|
|
if self.connection and not self.connection.closed:
|
|
cur = self.connection.cursor()
|
|
cur.execute("SELECT 1")
|
|
cur.fetchone()
|
|
cur.close()
|
|
return True
|
|
except:
|
|
pass
|
|
return False
|
|
|
|
def update_car_info(self, session_id: str, brand: str, model: str, body_type: str) -> bool:
|
|
if not self.is_connected():
|
|
if not self.connect():
|
|
return False
|
|
|
|
try:
|
|
cur = self.connection.cursor()
|
|
query = """
|
|
INSERT INTO car_frontal_info (session_id, car_brand, car_model, car_body_type, updated_at)
|
|
VALUES (%s, %s, %s, %s, NOW())
|
|
ON CONFLICT (session_id)
|
|
DO UPDATE SET
|
|
car_brand = EXCLUDED.car_brand,
|
|
car_model = EXCLUDED.car_model,
|
|
car_body_type = EXCLUDED.car_body_type,
|
|
updated_at = NOW()
|
|
"""
|
|
cur.execute(query, (session_id, brand, model, body_type))
|
|
self.connection.commit()
|
|
cur.close()
|
|
logger.info(f"Updated car info for session {session_id}: {brand} {model} ({body_type})")
|
|
return True
|
|
except Exception as e:
|
|
logger.error(f"Failed to update car info: {e}")
|
|
if self.connection:
|
|
self.connection.rollback()
|
|
return False
|
|
|
|
def execute_update(self, table: str, key_field: str, key_value: str, fields: Dict[str, str]) -> bool:
|
|
if not self.is_connected():
|
|
if not self.connect():
|
|
return False
|
|
|
|
try:
|
|
cur = self.connection.cursor()
|
|
|
|
# Build the UPDATE query dynamically
|
|
set_clauses = []
|
|
values = []
|
|
|
|
for field, value in fields.items():
|
|
if value == "NOW()":
|
|
set_clauses.append(f"{field} = NOW()")
|
|
else:
|
|
set_clauses.append(f"{field} = %s")
|
|
values.append(value)
|
|
|
|
# Add schema prefix if table doesn't already have it
|
|
full_table_name = table if '.' in table else f"gas_station_1.{table}"
|
|
|
|
query = f"""
|
|
INSERT INTO {full_table_name} ({key_field}, {', '.join(fields.keys())})
|
|
VALUES (%s, {', '.join(['%s'] * len(fields))})
|
|
ON CONFLICT ({key_field})
|
|
DO UPDATE SET {', '.join(set_clauses)}
|
|
"""
|
|
|
|
# Add key_value to the beginning of values list
|
|
all_values = [key_value] + list(fields.values()) + values
|
|
|
|
cur.execute(query, all_values)
|
|
self.connection.commit()
|
|
cur.close()
|
|
logger.info(f"Updated {table} for {key_field}={key_value}")
|
|
return True
|
|
except Exception as e:
|
|
logger.error(f"Failed to execute update on {table}: {e}")
|
|
if self.connection:
|
|
self.connection.rollback()
|
|
return False
|
|
|
|
def create_car_frontal_info_table(self) -> bool:
|
|
"""Create the car_frontal_info table in gas_station_1 schema if it doesn't exist."""
|
|
if not self.is_connected():
|
|
if not self.connect():
|
|
return False
|
|
|
|
try:
|
|
cur = self.connection.cursor()
|
|
|
|
# Create schema if it doesn't exist
|
|
cur.execute("CREATE SCHEMA IF NOT EXISTS gas_station_1")
|
|
|
|
# Create table if it doesn't exist
|
|
create_table_query = """
|
|
CREATE TABLE IF NOT EXISTS gas_station_1.car_frontal_info (
|
|
display_id VARCHAR(255),
|
|
captured_timestamp VARCHAR(255),
|
|
session_id VARCHAR(255) PRIMARY KEY,
|
|
license_character VARCHAR(255) DEFAULT NULL,
|
|
license_type VARCHAR(255) DEFAULT 'No model available',
|
|
car_brand VARCHAR(255) DEFAULT NULL,
|
|
car_model VARCHAR(255) DEFAULT NULL,
|
|
car_body_type VARCHAR(255) DEFAULT NULL,
|
|
updated_at TIMESTAMP DEFAULT NOW()
|
|
)
|
|
"""
|
|
|
|
cur.execute(create_table_query)
|
|
|
|
# Add columns if they don't exist (for existing tables)
|
|
alter_queries = [
|
|
"ALTER TABLE gas_station_1.car_frontal_info ADD COLUMN IF NOT EXISTS car_brand VARCHAR(255) DEFAULT NULL",
|
|
"ALTER TABLE gas_station_1.car_frontal_info ADD COLUMN IF NOT EXISTS car_model VARCHAR(255) DEFAULT NULL",
|
|
"ALTER TABLE gas_station_1.car_frontal_info ADD COLUMN IF NOT EXISTS car_body_type VARCHAR(255) DEFAULT NULL",
|
|
"ALTER TABLE gas_station_1.car_frontal_info ADD COLUMN IF NOT EXISTS updated_at TIMESTAMP DEFAULT NOW()"
|
|
]
|
|
|
|
for alter_query in alter_queries:
|
|
try:
|
|
cur.execute(alter_query)
|
|
logger.debug(f"Executed: {alter_query}")
|
|
except Exception as e:
|
|
# Ignore errors if column already exists (for older PostgreSQL versions)
|
|
if "already exists" in str(e).lower():
|
|
logger.debug(f"Column already exists, skipping: {alter_query}")
|
|
else:
|
|
logger.warning(f"Error in ALTER TABLE: {e}")
|
|
|
|
self.connection.commit()
|
|
cur.close()
|
|
logger.info("Successfully created/verified car_frontal_info table with all required columns")
|
|
return True
|
|
|
|
except Exception as e:
|
|
logger.error(f"Failed to create car_frontal_info table: {e}")
|
|
if self.connection:
|
|
self.connection.rollback()
|
|
return False
|
|
|
|
def insert_initial_detection(self, display_id: str, captured_timestamp: str, session_id: str = None) -> str:
|
|
"""Insert initial detection record and return the session_id."""
|
|
if not self.is_connected():
|
|
if not self.connect():
|
|
return None
|
|
|
|
# Generate session_id if not provided
|
|
if not session_id:
|
|
session_id = str(uuid.uuid4())
|
|
|
|
try:
|
|
# Ensure table exists
|
|
if not self.create_car_frontal_info_table():
|
|
logger.error("Failed to create/verify table before insertion")
|
|
return None
|
|
|
|
cur = self.connection.cursor()
|
|
insert_query = """
|
|
INSERT INTO gas_station_1.car_frontal_info
|
|
(display_id, captured_timestamp, session_id, license_character, license_type, car_brand, car_model, car_body_type)
|
|
VALUES (%s, %s, %s, NULL, 'No model available', NULL, NULL, NULL)
|
|
ON CONFLICT (session_id) DO NOTHING
|
|
"""
|
|
|
|
cur.execute(insert_query, (display_id, captured_timestamp, session_id))
|
|
self.connection.commit()
|
|
cur.close()
|
|
logger.info(f"Inserted initial detection record with session_id: {session_id}")
|
|
return session_id
|
|
|
|
except Exception as e:
|
|
logger.error(f"Failed to insert initial detection record: {e}")
|
|
if self.connection:
|
|
self.connection.rollback()
|
|
return None |