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import sqlite3
from datetime import date, datetime
from configparser import ConfigParser
import io
class Tax:
def __init__(self, name="", ratio = 0.0):
self.name = name.upper()
self.ratio = ratio
class Product:
def __init__(self, description, units=1.0,
price_unit=0.0, vat = 0.21):
if len(description) == 0:
raise ValueError("Product: No description provided")
self.description = description
self.units = units
self.price_unit = price_unit
self.vat = vat
class Customer:
def __init__(self, name, id = "", address = ""):
if len(name) == 0:
raise ValueError("Customer: No name provided")
self.name = name
self.id = id
self.address = address
class Invoice:
TYPES = {"sent", "received"}
SERIES = {}
ID_FORMAT = None
CURRENCY = None
CURRENCY_DECIMAL = 0
DB_FILE = None
DEFAULT_TAXES = ()
DEFAULT_PRODUCT_DESC = "Empty Product"
DEFAULT_CUSTOMER_DESC = "Empty Customer"
def __init__(self, type = None,
series = None,
idate = None,
notes= None,
products = None,
customers = None,
taxes = None):
# Initializes to empty state if not set
self.set_type(type or tuple(Invoice.TYPES)[0])
self.id = None
self.set_series(series or tuple(Invoice.SERIES.keys())[0])
self.date = idate or date.today()
self.notes = notes or ""
self.products = products or (Product(Invoice.DEFAULT_PRODUCT_DESC),
Product(Invoice.DEFAULT_PRODUCT_DESC))
self.customer = customers or Customer(Invoice.DEFAULT_CUSTOMER_DESC)
self.taxes = taxes or Invoice.DEFAULT_TAXES
def set_series(self, series):
if series not in Invoice.SERIES.keys():
raise ValueError ("Not valid series for Invoice. Valid are %s"
% Invoice.SERIES)
self.series = series
def set_type(self, type):
if type not in Invoice.TYPES:
raise ValueError ("Not valid type for Invoice. Valid are: %s"
% Invoice.TYPES)
self.type = type
def dump(self):
print(self.format_id())
def format_id(self):
return Invoice.ID_FORMAT(self.series, self.date, self.id)
def to_config(self):
strf = io.StringIO()
cfg = ConfigParser()
cfg["invoice"] = {
"series": self.series,
"date": self.date,
"type": self.type,
"notes": self.notes,
"customer-name": self.customer.name,
"customer-address": self.customer.address,
"customer-id": self.customer.id,
}
for i,p in enumerate(self.products):
cfg["product-"+str(i)] = {
"description": p.description,
"units": p.units,
"price_unit": p.price_unit,
"vat": p.vat
}
cfg["taxes"] = { x.name: x.ratio for x in self.taxes }
cfg.write(strf)
return strf.getvalue()
def from_config(self, config):
cfg = ConfigParser()
cfg.read_string(config)
# PRODUCTS SECTIONS
self.products = ()
for s in cfg.sections():
if not s.startswith("product"):
continue
desc = cfg[s]["description"]
un = float(cfg[s]["units"])
pu = float(cfg[s]["price_unit"])
vat = float(cfg[s]["vat"])
self.products += ( Product(desc,un,pu,vat) ,)
if cfg[s]["description"] == Invoice.DEFAULT_PRODUCT_DESC:
raise ValueError("Product name not set")
if len(self.products) == 0:
raise ValueError("No products assigned")
# TAXES SECTION
self.taxes = ()
if cfg.has_section("taxes"):
for x in cfg["taxes"]:
self.taxes += ( Tax(x, float(cfg["taxes"][x])) ,)
# INVOICE SECTION
if not cfg.has_section("invoice"):
raise ValueError("[invoice] section needed")
i = cfg["invoice"]
self.set_series(int(i["series"]))
self.date = datetime.strptime(i["date"], "%Y-%m-%d").date()
self.notes = i["notes"]
self.set_type(i["type"])
self.customer= Customer(i["customer-name"],
i["customer-address"],
i["customer-id"])
if i["customer-name"] == Invoice.DEFAULT_CUSTOMER_DESC:
raise ValueError("Customer name not set")
def persist(self):
conn = sqlite3.connect(Invoice.DB_FILE)
c = conn.cursor()
c.execute("""INSERT INTO invoices (
type,
series,
date,
notes,
customer_id,
customer_name,
customer_address
) VALUES (?,?,?,?,?,?,?)""", (
self.type,
self.series,
self.date.strftime("%Y-%m-%d"),
self.notes,
self.customer.id,
self.customer.name,
self.customer.address
))
self.id = c.lastrowid
for p in self.products:
c.execute("""INSERT INTO products (
invoice_id,
description,
units,
price_unit,
vat
) VALUES (?,?,?,?,?)""",(
self.id,
p.description,
p.units,
p.price_unit,
p.vat
))
for x in self.taxes:
c.execute("""INSERT INTO taxes (
invoice_id,
name,
ratio
) VALUES (?,?,?)""", (self.id, x.name, x.ratio))
conn.commit()
conn.close()
return self.id
def load(id):
with sqlite3.connect(Invoice.DB_FILE) as conn:
conn.row_factory = sqlite3.Row
invoice = Invoice()
c = conn.cursor()
# PRODUCTS
products = ()
c.execute("""SELECT * FROM products WHERE invoice_id = ?""", (id,))
res = c.fetchone()
while res is not None:
desc = res["description"]
un = res["units"]
pu = res["price_unit"]
vat = res["vat"]
products += (Product(desc,un,pu,vat),)
res = c.fetchone()
# TAXES
taxes = ()
c.execute("""SELECT * FROM taxes WHERE invoice_id = ?""", (id,))
res = c.fetchone()
while res is not None:
taxes += (Tax(res["name"], res["ratio"]) ,)
res = c.fetchone()
# INVOICE
c.execute("""SELECT * FROM invoices WHERE id = ?""", (id,))
res = c.fetchone()
return Invoice(
res["type"],
res["series"],
res["date"],
res["notes"],
products,
Customer( res["customer_name"],
res["customer_id"],
res["customer_address"] ),
taxes)
def format(self):
# TODO
pass
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