flectra/addons/l10n_fr_certification/models/account.py
2018-01-18 16:56:22 +05:30

198 lines
10 KiB
Python

# -*- coding: utf-8 -*-
# Part of Odoo, Flectra. See LICENSE file for full copyright and licensing details.
from hashlib import sha256
from json import dumps
from flectra import models, api, fields
from flectra.tools.translate import _
from flectra.exceptions import UserError
#forbidden fields
MOVE_FIELDS = ['date', 'journal_id', 'company_id']
LINE_FIELDS = ['debit', 'credit', 'account_id', 'partner_id']
class AccountMove(models.Model):
_inherit = "account.move"
# TO DO in master : refactor hashing algo to go into a mixin
l10n_fr_secure_sequence_number = fields.Integer(string="Inalteralbility No Gap Sequence #", readonly=True, copy=False)
l10n_fr_hash = fields.Char(string="Inalterability Hash", readonly=True, copy=False)
l10n_fr_string_to_hash = fields.Char(compute='_compute_string_to_hash', readonly=True, store=False)
def _get_new_hash(self, secure_seq_number):
""" Returns the hash to write on journal entries when they get posted"""
self.ensure_one()
#get the only one exact previous move in the securisation sequence
prev_move = self.search([('state', '=', 'posted'),
('company_id', '=', self.company_id.id),
('l10n_fr_secure_sequence_number', '!=', 0),
('l10n_fr_secure_sequence_number', '=', int(secure_seq_number) - 1)])
if prev_move and len(prev_move) != 1:
raise UserError(
_('An error occured when computing the inalterability. Impossible to get the unique previous posted journal entry.'))
#build and return the hash
return self._compute_hash(prev_move.l10n_fr_hash if prev_move else u'')
def _compute_hash(self, previous_hash):
""" Computes the hash of the browse_record given as self, based on the hash
of the previous record in the company's securisation sequence given as parameter"""
self.ensure_one()
hash_string = sha256((previous_hash + self.l10n_fr_string_to_hash).encode('utf-8'))
return hash_string.hexdigest()
def _compute_string_to_hash(self):
def _getattrstring(obj, field_str):
field_value = obj[field_str]
if obj._fields[field_str].type == 'many2one':
field_value = field_value.id
return str(field_value)
for move in self:
values = {}
for field in MOVE_FIELDS:
values[field] = _getattrstring(move, field)
for line in move.line_ids:
for field in LINE_FIELDS:
k = 'line_%d_%s' % (line.id, field)
values[k] = _getattrstring(line, field)
#make the json serialization canonical
# (https://tools.ietf.org/html/draft-staykov-hu-json-canonical-form-00)
move.l10n_fr_string_to_hash = dumps(values, sort_keys=True,
ensure_ascii=True, indent=None,
separators=(',',':'))
@api.multi
def write(self, vals):
has_been_posted = False
for move in self:
if move.company_id._is_accounting_unalterable():
# write the hash and the secure_sequence_number when posting an account.move
if vals.get('state') == 'posted':
has_been_posted = True
# restrict the operation in case we are trying to write a forbidden field
if (move.state == "posted" and set(vals).intersection(MOVE_FIELDS)):
raise UserError(_("According to the French law, you cannot modify a journal entry in order for its posted data to be updated or deleted. Unauthorized field: %s.") % ', '.join(MOVE_FIELDS))
# restrict the operation in case we are trying to overwrite existing hash
if (move.l10n_fr_hash and 'l10n_fr_hash' in vals) or (move.l10n_fr_secure_sequence_number and 'l10n_fr_secure_sequence_number' in vals):
raise UserError(_('You cannot overwrite the values ensuring the inalterability of the accounting.'))
res = super(AccountMove, self).write(vals)
# write the hash and the secure_sequence_number when posting an account.move
if has_been_posted:
for move in self.filtered(lambda m: m.company_id._is_accounting_unalterable() and
not (m.l10n_fr_secure_sequence_number or m.l10n_fr_hash)):
new_number = move.company_id.l10n_fr_secure_sequence_id.next_by_id()
vals_hashing = {'l10n_fr_secure_sequence_number': new_number,
'l10n_fr_hash': move._get_new_hash(new_number)}
res |= super(AccountMove, move).write(vals_hashing)
return res
@api.multi
def button_cancel(self):
#by-pass the normal behavior/message that tells people can cancel a posted journal entry
#if the journal allows it.
if self.company_id._is_accounting_unalterable():
raise UserError(_('You cannot modify a posted journal entry. This ensures its inalterability.'))
super(AccountMove, self).button_cancel()
@api.model
def _check_hash_integrity(self, company_id):
"""Checks that all posted moves have still the same data as when they were posted
and raises an error with the result.
"""
def build_move_info(move):
entry_reference = _('(ref.: %s)')
move_reference_string = move.ref and entry_reference % move.ref or ''
return [move.name, move_reference_string]
moves = self.search([('state', '=', 'posted'),
('company_id', '=', company_id),
('l10n_fr_secure_sequence_number', '!=', 0)],
order="l10n_fr_secure_sequence_number ASC")
if not moves:
raise UserError(_('There isn\'t any journal entry flagged for data inalterability yet for the company %s. This mechanism only runs for journal entries generated after the installation of the module France - Certification CGI 286 I-3 bis.') % self.env.user.company_id.name)
previous_hash = u''
start_move_info = []
for move in moves:
if move.l10n_fr_hash != move._compute_hash(previous_hash=previous_hash):
raise UserError(_('Corrupted data on journal entry with id %s.') % move.id)
if not previous_hash:
#save the date and sequence number of the first move hashed
start_move_info = build_move_info(move)
previous_hash = move.l10n_fr_hash
end_move_info = build_move_info(move)
report_dict = {'start_move_name': start_move_info[0],
'start_move_ref': start_move_info[1],
'end_move_name': end_move_info[0],
'end_move_ref': end_move_info[1]}
# Raise on success
raise UserError(_('''Successful test !
The journal entries are guaranteed to be in their original and inalterable state
From: %(start_move_name)s %(start_move_ref)s
To: %(end_move_name)s %(end_move_ref)s
For this report to be legally meaningful, please download your certification from your customer account on Flectra.com (Only for Flectra Enterprise users).'''
) % report_dict)
class AccountMoveLine(models.Model):
_inherit = "account.move.line"
@api.multi
def write(self, vals):
# restrict the operation in case we are trying to write a forbidden field
if set(vals).intersection(LINE_FIELDS):
if any(l.company_id._is_accounting_unalterable() and l.move_id.state == 'posted' for l in self):
raise UserError(_("According to the French law, you cannot modify a journal item in order for its posted data to be updated or deleted. Unauthorized field: %s.") % ', '.join(LINE_FIELDS))
return super(AccountMoveLine, self).write(vals)
class AccountJournal(models.Model):
_inherit = "account.journal"
@api.onchange('update_posted')
def _onchange_update_posted(self):
if self.update_posted and self.company_id._is_accounting_unalterable():
field_string = self._fields['update_posted'].get_description(self.env)['string']
raise UserError(_("According to the French law, you cannot modify a journal in order for its posted data to be updated or deleted. Unauthorized field: %s.") % field_string)
@api.multi
def _is_journal_alterable(self):
self.ensure_one()
critical_domain = [('journal_id', '=', self.id),
'|', ('l10n_fr_hash', '!=', False),
'&', ('l10n_fr_secure_sequence_number', '!=', False),
('l10n_fr_secure_sequence_number', '!=', 0)]
if self.env['account.move'].search(critical_domain):
raise UserError(_('It is not permitted to disable the data inalterability in this journal (%s) since journal entries have already been protected.') % (self.name, ))
return True
@api.multi
def write(self, vals):
# restrict the operation in case we are trying to write a forbidden field
for journal in self:
if journal.company_id._is_accounting_unalterable():
if vals.get('update_posted'):
field_string = journal._fields['update_posted'].get_description(self.env)['string']
raise UserError(_("According to the French law, you cannot modify a journal in order for its posted data to be updated or deleted. Unauthorized field: %s.") % field_string)
return super(AccountJournal, self).write(vals)
@api.model
def create(self, vals):
# restrict the operation in case we are trying to set a forbidden field
if self.company_id._is_accounting_unalterable():
if vals.get('update_posted'):
field_string = self._fields['update_posted'].get_description(self.env)['string']
raise UserError(_("According to the French law, you cannot modify a journal in order for its posted data to be updated or deleted. Unauthorized field: %s.") % field_string)
return super(AccountJournal, self).create(vals)