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401b16c | 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 | import sqlite3
from typing import Optional, List, Dict, Any
from sqlalchemy import create_engine, text
from sqlalchemy.orm import sessionmaker
from models import Base, Supplier, Customer, Product, Purchase, Sale, EntityExtraction
class DatabaseManager:
def __init__(self, db_path: str = "chatbot.db"):
self.db_path = db_path
self.engine = create_engine(f"sqlite:///{db_path}")
Base.metadata.create_all(self.engine)
Session = sessionmaker(bind=self.engine)
self.session = Session()
self._initialize_data()
def _initialize_data(self):
"""Initialize database with sample data"""
# Add default suppliers if they don't exist
suppliers = ["TechMart", "Office Supplies Co", "Electronics Plus"]
for supplier_name in suppliers:
existing = self.session.query(Supplier).filter_by(name=supplier_name).first()
if not existing:
supplier = Supplier(name=supplier_name)
self.session.add(supplier)
# Add default products
products = [
("USB drives", "Electronics"),
("Office chairs", "Furniture"),
("Laptops", "Electronics"),
("Monitors", "Electronics"),
("Keyboards", "Electronics")
]
for product_name, category in products:
existing = self.session.query(Product).filter_by(name=product_name).first()
if not existing:
product = Product(name=product_name, category=category)
self.session.add(product)
self.session.commit()
def process_transaction(self, entities: EntityExtraction):
"""Process a transaction based on extracted entities"""
try:
if entities.transaction_type == "purchase":
return self._process_purchase(entities)
elif entities.transaction_type == "sale":
return self._process_sale(entities)
else:
return None, "Could not determine transaction type"
except Exception as e:
self.session.rollback()
return None, f"Error processing transaction: {str(e)}"
def _process_purchase(self, entities: EntityExtraction) -> str:
"""Process a purchase transaction"""
# Get or create supplier
supplier = None
if entities.supplier:
supplier = self.session.query(Supplier).filter_by(name=entities.supplier).first()
if not supplier:
supplier = Supplier(name=entities.supplier)
self.session.add(supplier)
self.session.flush()
# Get or create product
product = None
if entities.product:
product = self.session.query(Product).filter_by(name=entities.product).first()
if not product:
product = Product(name=entities.product)
self.session.add(product)
self.session.flush()
# Create purchase record
purchase = Purchase(
supplier_id=supplier.id if supplier else None,
product_id=product.id if product else None,
quantity=entities.quantity or 1,
unit_price=entities.unit_price or 0,
total_cost=entities.total_amount or (entities.quantity or 1) * (entities.unit_price or 0),
notes=entities.notes
)
self.session.add(purchase)
self.session.commit()
return purchase.id, f"Purchase recorded: {entities.quantity or 1}x {entities.product or 'Unknown'} from {entities.supplier or 'Unknown'} for €{entities.total_amount or 0}"
def _process_sale(self, entities: EntityExtraction) -> str:
"""Process a sale transaction"""
# Get or create customer
customer = None
if entities.customer:
customer = self.session.query(Customer).filter_by(name=entities.customer).first()
if not customer:
customer = Customer(name=entities.customer)
self.session.add(customer)
self.session.flush()
# Get or create product
product = None
if entities.product:
product = self.session.query(Product).filter_by(name=entities.product).first()
if not product:
product = Product(name=entities.product)
self.session.add(product)
self.session.flush()
# Create sale record
sale = Sale(
customer_id=customer.id if customer else None,
product_id=product.id if product else None,
quantity=entities.quantity or 1,
unit_price=entities.unit_price or 0,
total_amount=entities.total_amount or (entities.quantity or 1) * (entities.unit_price or 0),
notes=entities.notes
)
self.session.add(sale)
self.session.commit()
return sale.id, f"Sale recorded: {entities.quantity or 1}x {entities.product or 'Unknown'} to {entities.customer or 'Unknown'} for €{entities.total_amount or 0}"
def query_data(self, query: str) -> List[Dict[str, Any]]:
"""Execute a query and return results"""
try:
result = self.session.execute(text(query))
columns = result.keys()
rows = result.fetchall()
return [dict(zip(columns, row)) for row in rows]
except Exception as e:
return [{"error": str(e)}]
def get_recent_transactions(self, limit: int = 10) -> Dict[str, List[Dict]]:
"""Get recent purchases and sales"""
purchases = self.session.query(Purchase).order_by(Purchase.purchase_date.desc()).limit(limit).all()
sales = self.session.query(Sale).order_by(Sale.sale_date.desc()).limit(limit).all()
purchase_data = []
for p in purchases:
purchase_data.append({
"id": p.id,
"supplier": p.supplier.name if p.supplier else "Unknown",
"product": p.product.name if p.product else "Unknown",
"quantity": p.quantity,
"unit_price": float(p.unit_price),
"total_cost": float(p.total_cost),
"date": p.purchase_date.isoformat(),
"type": "purchase"
})
sale_data = []
for s in sales:
sale_data.append({
"id": s.id,
"customer": s.customer.name if s.customer else "Unknown",
"product": s.product.name if s.product else "Unknown",
"quantity": s.quantity,
"unit_price": float(s.unit_price),
"total_amount": float(s.total_amount),
"date": s.sale_date.isoformat(),
"type": "sale"
})
return {"purchases": purchase_data, "sales": sale_data}
def search_transactions(self, search_term: str) -> List[Dict[str, Any]]:
"""Search transactions by supplier, customer, or product"""
results = []
# Search purchases
purchases = self.session.query(Purchase).join(Supplier, Purchase.supplier_id == Supplier.id, isouter=True)\
.join(Product, Purchase.product_id == Product.id, isouter=True)\
.filter(
(Supplier.name.contains(search_term)) |
(Product.name.contains(search_term)) |
(Purchase.notes.contains(search_term))
).all()
for p in purchases:
results.append({
"id": p.id,
"type": "purchase",
"supplier": p.supplier.name if p.supplier else "Unknown",
"product": p.product.name if p.product else "Unknown",
"quantity": p.quantity,
"unit_price": float(p.unit_price),
"total": float(p.total_cost),
"date": p.purchase_date.isoformat()
})
# Search sales
sales = self.session.query(Sale).join(Customer, Sale.customer_id == Customer.id, isouter=True)\
.join(Product, Sale.product_id == Product.id, isouter=True)\
.filter(
(Customer.name.contains(search_term)) |
(Product.name.contains(search_term)) |
(Sale.notes.contains(search_term))
).all()
for s in sales:
results.append({
"id": s.id,
"type": "sale",
"customer": s.customer.name if s.customer else "Unknown",
"product": s.product.name if s.product else "Unknown",
"quantity": s.quantity,
"unit_price": float(s.unit_price),
"total": float(s.total_amount),
"date": s.sale_date.isoformat()
})
return sorted(results, key=lambda x: x["date"], reverse=True)
def get_transaction_by_id(self, transaction_id: int, transaction_type: str) -> Optional[Dict[str, Any]]:
"""Retrieve a specific transaction by ID and type"""
try:
if transaction_type == "purchase":
transaction = self.session.query(Purchase).filter_by(id=transaction_id).first()
if transaction:
return {
"id": transaction.id,
"type": "purchase",
"supplier_id": transaction.supplier_id,
"product_id": transaction.product_id,
"quantity": transaction.quantity,
"unit_price": transaction.unit_price,
"total_cost": transaction.total_cost,
"purchase_date": transaction.purchase_date.isoformat() if transaction.purchase_date else None,
"notes": transaction.notes
}
elif transaction_type == "sale":
transaction = self.session.query(Sale).filter_by(id=transaction_id).first()
if transaction:
return {
"id": transaction.id,
"type": "sale",
"customer_id": transaction.customer_id,
"product_id": transaction.product_id,
"quantity": transaction.quantity,
"unit_price": transaction.unit_price,
"total_amount": transaction.total_amount,
"sale_date": transaction.sale_date.isoformat() if transaction.sale_date else None,
"notes": transaction.notes
}
return None
except Exception as e:
print(f"Error retrieving transaction by ID: {e}")
return None
def close(self):
"""Close database connection"""
self.session.close() |