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239 lines
9.6 KiB
239 lines
9.6 KiB
# -*- coding: utf-8 -*-
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"""Class to parse camt files."""
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##############################################################################
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#
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# Copyright (C) 2013-2015 Therp BV <http://therp.nl>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published
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# by the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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##############################################################################
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import re
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from datetime import datetime
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from lxml import etree
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from openerp.addons.account_bank_statement_import.parserlib import (
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BankStatement)
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class CamtParser(object):
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"""Parser for camt bank statement import files."""
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def parse_amount(self, ns, node):
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"""Parse element that contains Amount and CreditDebitIndicator."""
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if node is None:
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return 0.0
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sign = 1
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amount = 0.0
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sign_node = node.xpath('ns:CdtDbtInd', namespaces={'ns': ns})
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if sign_node and sign_node[0].text == 'DBIT':
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sign = -1
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amount_node = node.xpath('ns:Amt', namespaces={'ns': ns})
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if amount_node:
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amount = sign * float(amount_node[0].text)
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return amount
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def add_value_from_node(
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self, ns, node, xpath_str, obj, attr_name, join_str=None):
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"""Add value to object from first or all nodes found with xpath.
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If xpath_str is a list (or iterable), it will be seen as a series
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of search path's in order of preference. The first item that results
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in a found node will be used to set a value."""
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if not isinstance(xpath_str, (list, tuple)):
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xpath_str = [xpath_str]
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for search_str in xpath_str:
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found_node = node.xpath(search_str, namespaces={'ns': ns})
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if found_node:
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if join_str is None:
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attr_value = found_node[0].text
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else:
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attr_value = join_str.join([x.text for x in found_node])
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setattr(obj, attr_name, attr_value)
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break
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def parse_transaction_details(self, ns, node, transaction):
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"""Parse transaction details (message, party, account...)."""
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# message
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self.add_value_from_node(
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ns, node, [
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'./ns:RmtInf/ns:Ustrd',
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'./ns:AddtlTxInf',
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'./ns:AddtlNtryInf',
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], transaction, 'message')
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# eref
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self.add_value_from_node(
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ns, node, [
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'./ns:RmtInf/ns:Strd/ns:CdtrRefInf/ns:Ref',
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'./ns:Refs/ns:EndToEndId',
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],
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transaction, 'eref'
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)
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# remote party values
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party_type = 'Dbtr'
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party_type_node = node.xpath(
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'../../ns:CdtDbtInd', namespaces={'ns': ns})
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if party_type_node and party_type_node[0].text != 'CRDT':
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party_type = 'Cdtr'
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party_node = node.xpath(
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'./ns:RltdPties/ns:%s' % party_type, namespaces={'ns': ns})
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if party_node:
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self.add_value_from_node(
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ns, party_node[0], './ns:Nm', transaction, 'remote_owner')
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self.add_value_from_node(
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ns, party_node[0], './ns:PstlAdr/ns:Ctry', transaction,
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'remote_owner_country'
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)
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address_node = party_node[0].xpath(
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'./ns:PstlAdr/ns:AdrLine', namespaces={'ns': ns})
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if address_node:
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transaction.remote_owner_address = [address_node[0].text]
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# Get remote_account from iban or from domestic account:
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account_node = node.xpath(
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'./ns:RltdPties/ns:%sAcct/ns:Id' % party_type,
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namespaces={'ns': ns}
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)
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if account_node:
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iban_node = account_node[0].xpath(
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'./ns:IBAN', namespaces={'ns': ns})
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if iban_node:
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transaction.remote_account = iban_node[0].text
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bic_node = node.xpath(
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'./ns:RltdAgts/ns:%sAgt/ns:FinInstnId/ns:BIC' % party_type,
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namespaces={'ns': ns}
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)
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if bic_node:
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transaction.remote_bank_bic = bic_node[0].text
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else:
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self.add_value_from_node(
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ns, account_node[0], './ns:Othr/ns:Id', transaction,
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'remote_account'
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)
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def parse_transaction(self, ns, node, transaction):
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"""Parse transaction (entry) node."""
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self.add_value_from_node(
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ns, node, './ns:BkTxCd/ns:Prtry/ns:Cd', transaction,
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'transfer_type'
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)
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self.add_value_from_node(
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ns, node, './ns:BookgDt/ns:Dt', transaction, 'execution_date')
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self.add_value_from_node(
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ns, node, './ns:ValDt/ns:Dt', transaction, 'value_date')
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transaction.transferred_amount = self.parse_amount(ns, node)
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details_node = node.xpath(
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'./ns:NtryDtls/ns:TxDtls', namespaces={'ns': ns})
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if details_node:
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self.parse_transaction_details(ns, details_node[0], transaction)
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transaction.data = etree.tostring(node)
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return transaction
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def get_balance_amounts(self, ns, node):
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"""Return opening and closing balance.
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Depending on kind of balance and statement, the balance might be in a
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different kind of node:
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OPBD = OpeningBalance
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PRCD = PreviousClosingBalance
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ITBD = InterimBalance (first ITBD is start-, second is end-balance)
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CLBD = ClosingBalance
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"""
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start_balance_node = None
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end_balance_node = None
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for node_name in ['OPBD', 'PRCD', 'CLBD', 'ITBD']:
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code_expr = (
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'./ns:Bal/ns:Tp/ns:CdOrPrtry/ns:Cd[text()="%s"]/../../..' %
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node_name
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)
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balance_node = node.xpath(code_expr, namespaces={'ns': ns})
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if balance_node:
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if node_name in ['OPBD', 'PRCD']:
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start_balance_node = balance_node[0]
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elif node_name == 'CLBD':
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end_balance_node = balance_node[0]
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else:
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if not start_balance_node:
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start_balance_node = balance_node[0]
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if not end_balance_node:
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end_balance_node = balance_node[-1]
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return (
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self.parse_amount(ns, start_balance_node),
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self.parse_amount(ns, end_balance_node)
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)
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def parse_statement(self, ns, node):
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"""Parse a single Stmt node."""
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statement = BankStatement()
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self.add_value_from_node(
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ns, node, [
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'./ns:Acct/ns:Id/ns:IBAN',
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'./ns:Acct/ns:Id/ns:Othr/ns:Id',
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], statement, 'local_account'
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)
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self.add_value_from_node(
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ns, node, './ns:Id', statement, 'statement_id')
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self.add_value_from_node(
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ns, node, './ns:Acct/ns:Ccy', statement, 'local_currency')
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(statement.start_balance, statement.end_balance) = (
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self.get_balance_amounts(ns, node))
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transaction_nodes = node.xpath('./ns:Ntry', namespaces={'ns': ns})
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for entry_node in transaction_nodes:
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transaction = statement.create_transaction()
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self.parse_transaction(ns, entry_node, transaction)
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if statement['transactions']:
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statement.date = datetime.strptime(
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statement['transactions'][0].execution_date, "%Y-%m-%d")
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return statement
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def check_version(self, ns, root):
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"""Validate validity of camt file."""
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# Check wether it is camt at all:
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re_camt = re.compile(
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r'(^urn:iso:std:iso:20022:tech:xsd:camt.'
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r'|^ISO:camt.)'
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)
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if not re_camt.search(ns):
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raise ValueError('no camt: ' + ns)
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# Check wether version 052 or 053:
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re_camt_version = re.compile(
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r'(^urn:iso:std:iso:20022:tech:xsd:camt.053.'
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r'|^urn:iso:std:iso:20022:tech:xsd:camt.052.'
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r'|^ISO:camt.053.'
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r'|^ISO:camt.052.)'
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)
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if not re_camt_version.search(ns):
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raise ValueError('no camt 052 or 053: ' + ns)
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# Check GrpHdr element:
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root_0_0 = root[0][0].tag[len(ns) + 2:] # strip namespace
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if root_0_0 != 'GrpHdr':
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raise ValueError('expected GrpHdr, got: ' + root_0_0)
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def parse(self, data):
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"""Parse a camt.052 or camt.053 file."""
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try:
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root = etree.fromstring(
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data, parser=etree.XMLParser(recover=True))
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except etree.XMLSyntaxError:
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# ABNAmro is known to mix up encodings
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root = etree.fromstring(
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data.decode('iso-8859-15').encode('utf-8'))
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if root is None:
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raise ValueError(
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'Not a valid xml file, or not an xml file at all.')
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ns = root.tag[1:root.tag.index("}")]
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self.check_version(ns, root)
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statements = []
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for node in root[0][1:]:
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statement = self.parse_statement(ns, node)
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if len(statement['transactions']):
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statements.append(statement)
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return statements
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