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model.py
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model.py
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from datetime import datetime
from decimal import Decimal
from typing import NamedTuple, Optional, List
Price = Decimal
Money = Decimal
Amount = int
SKU = str
Unit = str
CustomerID = int
DocumentID = int
NewID = -1
class Product(NamedTuple):
sku: SKU
name: str
units: Unit
class Customer(NamedTuple):
name: str
id: CustomerID = NewID
class Receive(NamedTuple):
sku: SKU
date: datetime
price: Price
amount: Amount
id: DocumentID = NewID
class Dispatch(NamedTuple):
cid: CustomerID
sku: SKU
date: datetime
price: Price
amount: Amount
id: DocumentID = NewID
class Movement(NamedTuple):
sku: SKU
rid: DocumentID
did: Optional[DocumentID]
date: datetime
price: Price
amount: Amount
id: DocumentID = NewID
class Balance(NamedTuple):
id: DocumentID
date: datetime
sku: SKU
price: Price
amount: Amount
balance: Amount
class DispatchPlan(NamedTuple):
price: Price
requestAmount: Amount
stockAmount: Amount
balances: List[Balance]
class ReportEntry(NamedTuple):
sku: Optional[SKU]
cost: Money
price: Price
amount: Amount
class Report(NamedTuple):
totalCost: Money
entries: List[ReportEntry]