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[ENH] Improve determination of start and end balance for camt.

pull/78/head
Ronald Portier 8 years ago
parent
751890718f
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3b1a0561f7
1 changed files with 158 additions and 149 deletions
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  1. 307
      account_bank_statement_import_camt/models/parser.py

307
account_bank_statement_import_camt/models/parser.py
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@ -1,64 +1,64 @@
# -*- coding: utf-8 -*-
"""Class to parse camt files."""
##############################################################################
#
# Copyright (C) 2013-2015 Therp BV <http://therp.nl>
# Copyright 2017 Open Net Sàrl
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
##############################################################################
# Copyright 2013-2018 Therp BV <https://therp.nl>.
# Copyright 2015 1200wd.com.
# Copyright 2017 Open Net Sàrl.
# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
import logging
import re
from copy import copy
from datetime import datetime
from lxml import etree
from openerp import _
from openerp import _, models
from openerp.addons.account_bank_statement_import.parserlib import (
BankStatement)
from openerp import models
_logger = logging.getLogger(__name__)
class CamtParser(models.AbstractModel):
_name = 'account.bank.statement.import.camt.parser'
"""Parser for camt bank statement import files."""
_name = 'account.bank.statement.import.camt.parser'
def xpath(self, node, expr):
"""
Wrap namespaces argument into call to Element.xpath():
self.xpath(node, './ns:Acct/ns:Id')
"""
return node.xpath(expr, namespaces={'ns': self.namespace})
def parse_amount(self, node):
"""Parse element that contains Amount and CreditDebitIndicator.
First try to get debit/credit and amount from transaction details.
If not possible, try to get them from ancester element entry.
def parse_amount(self, ns, node):
"""Parse element that contains Amount and CreditDebitIndicator."""
Function is also called for statement opening balance!
Therefore also search for amount anywhere in node, if not found
elsewhere.
"""
if node is None:
return 0.0
sign = 1
amount = 0.0
sign_node = node.xpath('ns:CdtDbtInd', namespaces={'ns': ns})
sign_node = self.xpath(node, '../../ns:CdtDbtInd')
if not sign_node:
sign_node = node.xpath(
'../../ns:CdtDbtInd', namespaces={'ns': ns})
sign_node = self.xpath(node, 'ns:CdtDbtInd')
if sign_node and sign_node[0].text == 'DBIT':
sign = -1
amount_node = node.xpath('ns:Amt', namespaces={'ns': ns})
amount_node = self.xpath(node, './ns:AmtDtls/ns:TxAmt/ns:Amt')
if not amount_node:
amount_node = node.xpath(
'./ns:AmtDtls/ns:TxAmt/ns:Amt', namespaces={'ns': ns})
amount_node = self.xpath(node, '../../ns:Amt')
if not amount_node:
amount_node = self.xpath(node, 'ns:Amt')
if amount_node:
amount = sign * float(amount_node[0].text)
return amount
def add_value_from_node(
self, ns, node, xpath_str, obj, attr_name, join_str=None,
self, node, xpath_str, obj, attr_name, join_str=None,
default=None):
"""Add value to object from first or all nodes found with xpath.
@ -68,7 +68,7 @@ class CamtParser(models.AbstractModel):
if not isinstance(xpath_str, (list, tuple)):
xpath_str = [xpath_str]
for search_str in xpath_str:
found_node = node.xpath(search_str, namespaces={'ns': ns})
found_node = self.xpath(node, search_str)
if found_node:
if join_str is None:
attr_value = found_node[0].text
@ -80,13 +80,11 @@ class CamtParser(models.AbstractModel):
if default:
setattr(obj, attr_name, default)
def parse_transaction_details(self, ns, node, transaction):
"""Parse TxDtls node."""
def parse_transaction_details(self, node, transaction):
"""Parse transaction details (message, party, account...)."""
# message
self.add_value_from_node(
ns,
node,
[
node, [
'./ns:RmtInf/ns:Ustrd',
'./ns:AddtlTxInf',
'./ns:AddtlNtryInf',
@ -96,158 +94,161 @@ class CamtParser(models.AbstractModel):
transaction,
'message',
join_str='\n',
default=_('No description')
)
default=_('No description'))
# eref
self.add_value_from_node(
ns, node, [
node, [
'./ns:RmtInf/ns:Strd/ns:CdtrRefInf/ns:Ref',
'./ns:Refs/ns:EndToEndId',
],
transaction, 'eref'
)
amount = self.parse_amount(ns, node)
transaction, 'eref')
amount = self.parse_amount(node)
if amount != 0.0:
transaction['amount'] = amount
# remote party values
party_type = 'Dbtr'
party_type_node = node.xpath(
'../../ns:CdtDbtInd', namespaces={'ns': ns})
party_type_node = self.xpath(node, '../../ns:CdtDbtInd')
if party_type_node and party_type_node[0].text != 'CRDT':
party_type = 'Cdtr'
party_node = node.xpath(
'./ns:RltdPties/ns:%s' % party_type, namespaces={'ns': ns})
party_node = self.xpath(node, './ns:RltdPties/ns:%s' % party_type)
if party_node:
self.add_value_from_node(
ns, party_node[0], './ns:Nm', transaction, 'remote_owner')
party_node[0], './ns:Nm', transaction, 'remote_owner')
self.add_value_from_node(
ns, party_node[0], './ns:PstlAdr/ns:Ctry', transaction,
'remote_owner_country'
)
address_node = party_node[0].xpath(
'./ns:PstlAdr/ns:AdrLine', namespaces={'ns': ns})
party_node[0], './ns:PstlAdr/ns:Ctry', transaction,
'remote_owner_country')
address_node = self.xpath(
party_node[0], './ns:PstlAdr/ns:AdrLine')
if address_node:
transaction.remote_owner_address = [address_node[0].text]
# Get remote_account from iban or from domestic account:
account_node = node.xpath(
'./ns:RltdPties/ns:%sAcct/ns:Id' % party_type,
namespaces={'ns': ns}
)
account_node = self.xpath(
node, './ns:RltdPties/ns:%sAcct/ns:Id' % party_type)
if account_node:
iban_node = account_node[0].xpath(
'./ns:IBAN', namespaces={'ns': ns})
iban_node = self.xpath(account_node[0], './ns:IBAN')
if iban_node:
transaction.remote_account = iban_node[0].text
bic_node = node.xpath(
'./ns:RltdAgts/ns:%sAgt/ns:FinInstnId/ns:BIC' % party_type,
namespaces={'ns': ns}
)
bic_node = self.xpath(
node,
'./ns:RltdAgts/ns:%sAgt/ns:FinInstnId/ns:BIC'
% party_type)
if bic_node:
transaction.remote_bank_bic = bic_node[0].text
else:
self.add_value_from_node(
ns, account_node[0], './ns:Othr/ns:Id', transaction,
'remote_account'
)
account_node[0], './ns:Othr/ns:Id', transaction,
'remote_account')
def parse_entry(self, ns, node, transaction):
"""Parse an Ntry node and yield transactions."""
self.add_value_from_node(
ns, node, './ns:BkTxCd/ns:Prtry/ns:Cd', transaction,
'transfer_type'
)
def default_transaction_data(self, node, transaction):
if not transaction.eref:
self.add_value_from_node(
node, [
'./ns:NtryDtls/ns:RmtInf/ns:Strd/ns:CdtrRefInf/ns:Ref',
'./ns:NtryDtls/ns:Btch/ns:PmtInfId',
],
transaction, 'eref')
if not transaction.message:
self.add_value_from_node(
node, './ns:AddtlNtryInf', transaction, 'message')
def parse_entry(self, node, transaction):
"""Parse transaction (entry) node."""
self.add_value_from_node(
ns, node, './ns:BookgDt/ns:Dt', transaction, 'date')
node, './ns:BkTxCd/ns:Prtry/ns:Cd', transaction, 'transfer_type')
self.add_value_from_node(
ns, node, './ns:BookgDt/ns:Dt', transaction, 'execution_date')
node, './ns:BookgDt/ns:Dt', transaction, 'date')
self.add_value_from_node(
ns, node, './ns:ValDt/ns:Dt', transaction, 'value_date')
amount = self.parse_amount(ns, node)
if amount != 0.0:
transaction['amount'] = amount
node, './ns:BookgDt/ns:Dt', transaction, 'execution_date')
self.add_value_from_node(
ns, node, './ns:AddtlNtryInf', transaction, 'name')
node, './ns:ValDt/ns:Dt', transaction, 'value_date')
transaction.transferred_amount = self.parse_amount(node)
self.add_value_from_node(
ns, node, [
'./ns:NtryDtls/ns:RmtInf/ns:Strd/ns:CdtrRefInf/ns:Ref',
'./ns:NtryDtls/ns:Btch/ns:PmtInfId',
],
transaction, 'eref'
)
details_nodes = node.xpath(
'./ns:NtryDtls/ns:TxDtls', namespaces={'ns': ns})
if len(details_nodes) == 0:
node, './ns:AddtlNtryInf', transaction, 'name')
detail_nodes = self.xpath(node, './ns:NtryDtls/ns:TxDtls')
if len(detail_nodes) == 0:
self.default_transaction_data(node, transaction)
transaction.data = etree.tostring(node)
yield transaction
return
transaction_base = transaction
for i, dnode in enumerate(details_nodes):
for i, dnode in enumerate(detail_nodes):
transaction = copy(transaction_base)
self.parse_transaction_details(ns, dnode, transaction)
# transactions['data'] should be a synthetic xml snippet which
# contains only the TxDtls that's relevant.
# only set this field if statement lines have it
if 'data' in self.pool['account.bank.statement.line']._fields:
data = copy(node)
for j, dnode in enumerate(data.xpath(
'./ns:NtryDtls/ns:TxDtls', namespaces={'ns': ns})):
if j != i:
dnode.getparent().remove(dnode)
transaction['data'] = etree.tostring(data)
self.parse_transaction_details(dnode, transaction)
self.default_transaction_data(node, transaction)
transaction.data = etree.tostring(dnode)
yield transaction
def get_balance_amounts(self, ns, node):
"""Return opening and closing balance.
def get_balance_type_node(self, node, balance_type):
"""
:param node: BkToCstmrStmt/Stmt/Bal node
:param balance type: one of 'OPBD', 'PRCD', 'ITBD', 'CLBD'
"""
code_expr = (
'./ns:Bal/ns:Tp/ns:CdOrPrtry/ns:Cd[text()="%s"]/../../..' %
balance_type
)
return self.xpath(node, code_expr)
Depending on kind of balance and statement, the balance might be in a
different kind of node:
OPBD = OpeningBalance
PRCD = PreviousClosingBalance
ITBD = InterimBalance (first ITBD is start-, second is end-balance)
CLBD = ClosingBalance
def get_start_balance(self, node):
"""
start_balance_node = None
end_balance_node = None
for node_name in ['OPBD', 'PRCD', 'CLBD', 'ITBD']:
code_expr = (
'./ns:Bal/ns:Tp/ns:CdOrPrtry/ns:Cd[text()="%s"]/../../..' %
node_name
)
balance_node = node.xpath(code_expr, namespaces={'ns': ns})
if balance_node:
if node_name in ['OPBD', 'PRCD']:
start_balance_node = balance_node[0]
elif node_name == 'CLBD':
end_balance_node = balance_node[0]
else:
if not start_balance_node:
start_balance_node = balance_node[0]
if not end_balance_node:
end_balance_node = balance_node[-1]
return (
self.parse_amount(ns, start_balance_node),
self.parse_amount(ns, end_balance_node)
Find the (only) balance node with code OpeningBalance, or
the only one with code 'PreviousClosingBalance'
or the first balance node with code InterimBalance in
the case of preceeding pagination.
:param node: BkToCstmrStmt/Stmt/Bal node
"""
balance = 0
nodes = (
self.get_balance_type_node(node, 'OPBD') or
self.get_balance_type_node(node, 'PRCD') or
self.get_balance_type_node(node, 'ITBD')
)
if nodes:
balance = self.parse_amount(nodes[0])
return balance
def get_end_balance(self, node):
"""
Find the (only) balance node with code ClosingBalance, or
the second (and last) balance node with code InterimBalance in
the case of continued pagination.
:param node: BkToCstmrStmt/Stmt/Bal node
"""
balance = 0
nodes = (
self.get_balance_type_node(node, 'CLAV') or
self.get_balance_type_node(node, 'CLBD') or
self.get_balance_type_node(node, 'ITBD')
)
if nodes:
balance = self.parse_amount(nodes[-1])
return balance
def parse_statement(self, ns, node):
def parse_statement(self, node):
"""Parse a single Stmt node."""
statement = BankStatement()
self.add_value_from_node(
ns, node, [
node, [
'./ns:Acct/ns:Id/ns:IBAN',
'./ns:Acct/ns:Id/ns:Othr/ns:Id',
], statement, 'local_account'
)
self.add_value_from_node(node, './ns:Id', statement, 'statement_id')
self.add_value_from_node(
ns, node, './ns:Id', statement, 'statement_id')
self.add_value_from_node(
ns, node, './ns:Acct/ns:Ccy', statement, 'local_currency')
(statement.start_balance, statement.end_balance) = (
self.get_balance_amounts(ns, node))
entry_nodes = node.xpath('./ns:Ntry', namespaces={'ns': ns})
node, './ns:Acct/ns:Ccy', statement, 'local_currency')
statement.start_balance = self.get_start_balance(node)
statement.end_balance = self.get_end_balance(node)
entry_nodes = self.xpath(node, './ns:Ntry')
total_amount = 0
transactions = []
for entry_node in entry_nodes:
# There might be multiple transactions in one entry!!
transaction = statement.create_transaction()
transactions.extend(self.parse_entry(ns, entry_node, transaction))
transactions.extend(self.parse_entry(entry_node, transaction))
for transaction in transactions:
total_amount += transaction.transferred_amount
statement['transactions'] = transactions
if statement['transactions']:
execution_date = statement['transactions'][0].execution_date[:10]
@ -256,17 +257,25 @@ class CamtParser(models.AbstractModel):
if execution_date not in statement.statement_id:
statement.statement_id = "%s-%s" % (
execution_date, statement.statement_id)
if statement.start_balance == 0 and statement.end_balance != 0:
statement.start_balance = statement.end_balance - total_amount
_logger.debug(
_("Start balance %s calculated from end balance %s and"
" Total amount %s."),
statement.start_balance,
statement.end_balance,
total_amount)
return statement
def check_version(self, ns, root):
def check_version(self, root):
"""Validate validity of camt file."""
# Check wether it is camt at all:
re_camt = re.compile(
r'(^urn:iso:std:iso:20022:tech:xsd:camt.'
r'|^ISO:camt.)'
)
if not re_camt.search(ns):
raise ValueError('no camt: ' + ns)
if not re_camt.search(self.namespace):
raise ValueError('no camt: ' + self.namespace)
# Check wether version 052 or 053:
re_camt_version = re.compile(
r'(^urn:iso:std:iso:20022:tech:xsd:camt.053.'
@ -274,10 +283,10 @@ class CamtParser(models.AbstractModel):
r'|^ISO:camt.053.'
r'|^ISO:camt.052.)'
)
if not re_camt_version.search(ns):
raise ValueError('no camt 052 or 053: ' + ns)
if not re_camt_version.search(self.namespace):
raise ValueError('no camt 052 or 053: ' + self.namespace)
# Check GrpHdr element:
root_0_0 = root[0][0].tag[len(ns) + 2:] # strip namespace
root_0_0 = root[0][0].tag[len(self.namespace) + 2:] # strip namespace
if root_0_0 != 'GrpHdr':
raise ValueError('expected GrpHdr, got: ' + root_0_0)
@ -293,11 +302,11 @@ class CamtParser(models.AbstractModel):
if root is None:
raise ValueError(
'Not a valid xml file, or not an xml file at all.')
ns = root.tag[1:root.tag.index("}")]
self.check_version(ns, root)
self.namespace = root.tag[1:root.tag.index("}")]
self.check_version(root)
statements = []
for node in root[0][1:]:
statement = self.parse_statement(ns, node)
statement = self.parse_statement(node)
if len(statement['transactions']):
statements.append(statement)
return statements
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