112 lines
No EOL
4 KiB
Python
112 lines
No EOL
4 KiB
Python
import psycopg2
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import psycopg2.extras
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from typing import Optional, Dict, Any
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import logging
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logger = logging.getLogger(__name__)
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class DatabaseManager:
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def __init__(self, config: Dict[str, Any]):
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self.config = config
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self.connection: Optional[psycopg2.extensions.connection] = None
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def connect(self) -> bool:
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try:
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self.connection = psycopg2.connect(
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host=self.config['host'],
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port=self.config['port'],
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database=self.config['database'],
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user=self.config['username'],
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password=self.config['password']
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)
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logger.info("PostgreSQL connection established successfully")
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return True
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except Exception as e:
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logger.error(f"Failed to connect to PostgreSQL: {e}")
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return False
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def disconnect(self):
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if self.connection:
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self.connection.close()
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self.connection = None
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logger.info("PostgreSQL connection closed")
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def is_connected(self) -> bool:
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try:
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if self.connection and not self.connection.closed:
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cur = self.connection.cursor()
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cur.execute("SELECT 1")
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cur.fetchone()
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cur.close()
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return True
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except:
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pass
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return False
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def update_car_info(self, session_id: str, brand: str, model: str, body_type: str) -> bool:
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if not self.is_connected():
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if not self.connect():
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return False
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try:
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cur = self.connection.cursor()
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query = """
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INSERT INTO car_frontal_info (session_id, car_brand, car_model, car_body_type, updated_at)
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VALUES (%s, %s, %s, %s, NOW())
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ON CONFLICT (session_id)
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DO UPDATE SET
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car_brand = EXCLUDED.car_brand,
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car_model = EXCLUDED.car_model,
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car_body_type = EXCLUDED.car_body_type,
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updated_at = NOW()
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"""
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cur.execute(query, (session_id, brand, model, body_type))
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self.connection.commit()
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cur.close()
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logger.info(f"Updated car info for session {session_id}: {brand} {model} ({body_type})")
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return True
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except Exception as e:
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logger.error(f"Failed to update car info: {e}")
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if self.connection:
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self.connection.rollback()
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return False
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def execute_update(self, table: str, key_field: str, key_value: str, fields: Dict[str, str]) -> bool:
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if not self.is_connected():
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if not self.connect():
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return False
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try:
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cur = self.connection.cursor()
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# Build the UPDATE query dynamically
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set_clauses = []
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values = []
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for field, value in fields.items():
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if value == "NOW()":
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set_clauses.append(f"{field} = NOW()")
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else:
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set_clauses.append(f"{field} = %s")
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values.append(value)
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query = f"""
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INSERT INTO {table} ({key_field}, {', '.join(fields.keys())})
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VALUES (%s, {', '.join(['%s'] * len(fields))})
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ON CONFLICT ({key_field})
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DO UPDATE SET {', '.join(set_clauses)}
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"""
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# Add key_value to the beginning of values list
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all_values = [key_value] + list(fields.values()) + values
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cur.execute(query, all_values)
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self.connection.commit()
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cur.close()
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logger.info(f"Updated {table} for {key_field}={key_value}")
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return True
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except Exception as e:
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logger.error(f"Failed to execute update on {table}: {e}")
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if self.connection:
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self.connection.rollback()
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return False |