/
ekd_payment_term.py
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/
ekd_payment_term.py
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#This file is part of Tryton. The COPYRIGHT file at the top level of
#this repository contains the full copyright notices and license terms.
from decimal import Decimal
import datetime
import time
from dateutil.relativedelta import relativedelta
from trytond.model import ModelView, ModelSQL, fields
from trytond.backend import TableHandler
from trytond.pyson import Not, Equal, Eval
from trytond.transaction import Transaction
class PaymentTerm(ModelSQL, ModelView):
'Payment Term'
_name = 'ekd.document.payment_term'
_description = __doc__
name = fields.Char('Payment Term', size=None, required=True, translate=True)
active = fields.Boolean('Active')
description = fields.Text('Description', translate=True)
lines = fields.One2Many('ekd.document.payment_term.line', 'payment',
'Lines')
form_payment = fields.Selection([
('cash','Cash payment'),
('bank','Bank payment'),
('post','Post payment'),
('internet','Internet payment'),
], 'Form of payment')
kind_payment = fields.Selection([
('postpay','Postpay'),
('prepayment','Prepayment'),
('advance','Down payment'),
], 'Kind of payment')
def __init__(self):
super(PaymentTerm, self).__init__()
self._order.insert(0, ('name', 'ASC'))
self._error_messages.update({
'invalid_line': 'Invalid payment term line!',
'missing_remainder': 'Payment term missing a remainder line!',
})
def default_active(self):
return True
def compute(self, amount, currency, payment_term, date=None):
'''
Return list with (date, amount) for each payment term lines
'''
#TODO implement business_days
# http://pypi.python.org/pypi/BusinessHours/
type_obj = self.pool.get('ekd.document.payment_term.line.type')
delay_obj = self.pool.get(
'ekd.document.payment_term.line.delay')
currency_obj = self.pool.get('currency.currency')
date_obj = self.pool.get('ir.date')
res = []
if date is None:
date = date_obj.today()
remainder = amount
for line in payment_term.lines:
value = type_obj.get_value(line, remainder, currency)
value_date = delay_obj.get_date(line, date)
if not value or not value_date:
if (not remainder) and line.amount:
self.raise_user_error('invalid_line')
else:
continue
res.append((value_date, value))
remainder -= value
if not currency_obj.is_zero(currency, remainder):
self.raise_user_error('missing_remainder')
return res
PaymentTerm()
class PaymentTermLineType(ModelSQL, ModelView):
'Payment Term Line Type'
_name = 'ekd.document.payment_term.line.type'
_description = __doc__
name = fields.Char('Name', size=None, translate=True, required=True)
code = fields.Char('Code', size=None, required=True)
def __init__(self):
super(PaymentTermLineType, self).__init__()
self._sql_constraints += [
('code_uniq', 'UNIQUE(code)', 'The code must be unique!'),
]
self._order.insert(0, ('name', 'ASC'))
def get_value(self, line, amount, currency):
currency_obj = self.pool.get('currency.currency')
if line.type == 'fixed':
return currency_obj.compute(line.currency, line.amount, currency)
elif line.type == 'percent':
return currency_obj.round(currency,
amount * line.percentage / Decimal('100'))
elif line.type == 'remainder':
return currency_obj.round(currency, amount)
return None
PaymentTermLineType()
class PaymentTermLineDelay(ModelSQL, ModelView):
'Payment Term Line Delay'
_name = 'ekd.document.payment_term.line.delay'
_description = __doc__
name = fields.Char('Name', size=None, translate=True, required=True)
code = fields.Char('Code', size=None, required=True)
def __init__(self):
super(PaymentTermLineDelay, self).__init__()
self._sql_constraints += [
('code_uniq', 'UNIQUE(code)', 'The code must be unique!'),
]
self._order.insert(0, ('name', 'ASC'))
def get_date(self, line, date):
value = None
if line.delay in ('net_days', 'end_month'):
value = date + relativedelta(days=line.days)
if line.delay == 'end_month':
value += relativedelta(day=31)
return value
PaymentTermLineDelay()
class PaymentTermLine(ModelSQL, ModelView):
'Payment Term Line'
_name = 'ekd.document.payment_term.line'
_description = __doc__
sequence = fields.Integer('Sequence',
help='Use to order lines in ascending order')
payment = fields.Many2One('ekd.document.payment_term', 'Payment Term',
required=True, ondelete="CASCADE")
type = fields.Selection('get_type', 'Type', required=True,
on_change=['type'])
percentage = fields.Numeric('Percentage', digits=(16, 8),
states={
'invisible': Not(Equal(Eval('type'), 'percent')),
'required': Equal(Eval('type'), 'percent'),
}, help='In %')
amount = fields.Numeric('Amount', digits=(16, Eval('currency_digits', 2)),
states={
'invisible': Not(Equal(Eval('type'), 'fixed')),
'required': Equal(Eval('type'), 'fixed'),
})
currency = fields.Many2One('currency.currency', 'Currency',
states={
'invisible': Not(Equal(Eval('type'), 'fixed')),
'required': Equal(Eval('type'), 'fixed'),
})
currency_digits = fields.Function(fields.Integer('Currency Digits',
on_change_with=['currency']), 'get_currency_digits')
days = fields.Integer('Number of Days')
delay = fields.Selection('get_delay', 'Condition', required=True)
def __init__(self):
super(PaymentTermLine, self).__init__()
self._order.insert(0, ('sequence', 'ASC'))
def init(self, module_name):
super(PaymentTermLine, self).init(module_name)
cursor = Transaction().cursor
table = TableHandler(cursor, self, module_name)
def default_type(self):
return 'remainder'
def default_delay(self):
return 'net_days'
def get_type(self):
type_obj = self.pool.get('ekd.document.payment_term.line.type')
type_ids = type_obj.search([])
types = type_obj.browse(type_ids)
return [(x.code, x.name) for x in types]
def get_delay(self):
delay_obj = self.pool.get('ekd.document.payment_term.line.delay')
delay_ids = delay_obj.search([])
delays = delay_obj.browse(delay_ids)
return [(x.code, x.name) for x in delays]
def on_change_type(self, vals):
if not 'type' in vals:
return {}
res = {}
if vals['type'] != 'fixed':
res['amount'] = Decimal('0.0')
res['currency'] = False
if vals['type'] != 'percent':
res['percentage'] = Decimal('0.0')
return res
def on_change_with_currency_digits(self, vals):
currency_obj = self.pool.get('currency.currency')
if vals.get('currency'):
currency = currency_obj.browse(vals['currency'])
return currency.digits
return 2
def get_currency_digits(self, ids, name):
res = {}
for line in self.browse(ids):
if line.currency:
res[line.id] = line.currency.digits
else:
res[line.id] = 2
return res
PaymentTermLine()