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247 lines
10 KiB
247 lines
10 KiB
# -*- coding: utf-8 -*-
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# © 2014-2015 ACSONE SA/NV (<http://acsone.eu>)
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# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html).
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import re
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from collections import defaultdict
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from openerp.exceptions import Warning as UserError
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from openerp.models import expression
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from openerp.tools.safe_eval import safe_eval
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from openerp.tools.translate import _
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from .accounting_none import AccountingNone
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MODE_VARIATION = 'p'
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MODE_INITIAL = 'i'
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MODE_END = 'e'
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class AccountingExpressionProcessor(object):
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""" Processor for accounting expressions.
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Expressions of the form <field><mode>[accounts][optional move line domain]
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are supported, where:
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* field is bal, crd, deb
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* mode is i (initial balance), e (ending balance),
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p (moves over period)
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* accounts is a list of accounts, possibly containing % wildcards
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* an optional domain on move lines allowing filters on eg analytic
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accounts or journal
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Examples:
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* bal[70]: variation of the balance of moves on account 70
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over the period (it is the same as balp[70]);
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* bali[70,60]: balance of accounts 70 and 60 at the start of period;
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* bale[1%]: balance of accounts starting with 1 at end of period.
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How to use:
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* repeatedly invoke parse_expr() for each expression containing
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accounting variables as described above; this lets the processor
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group domains and modes and accounts;
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* when all expressions have been parsed, invoke done_parsing()
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to notify the processor that it can prepare to query (mainly
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search all accounts - children, consolidation - that will need to
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be queried;
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* for each period, call do_queries(), then call replace_expr() for each
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expression to replace accounting variables with their resulting value
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for the given period.
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How it works:
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* by accumulating the expressions before hand, it ensures to do the
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strict minimum number of queries to the database (for each period,
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one query per domain and mode);
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* it queries using the orm read_group which reduces to a query with
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sum on debit and credit and group by on account_id (note: it seems
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the orm then does one query per account to fetch the account
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name...);
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* additionally, one query per view/consolidation account is done to
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discover the children accounts.
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"""
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ACC_RE = re.compile(r"(?P<field>\bbal|\bcrd|\bdeb)"
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r"(?P<mode>[pise])?"
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r"(?P<accounts>_[a-zA-Z0-9]+|\[.*?\])"
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r"(?P<domain>\[.*?\])?")
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def __init__(self, env):
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self.env = env
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# before done_parsing: {(domain, mode): set(account_codes)}
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# after done_parsing: {(domain, mode): list(account_ids)}
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self._map_account_ids = defaultdict(set)
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# {account_code: account_id} where account_code can be
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# - None for all accounts
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# - NNN% for a like
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# - NNN for a code with an exact match
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self._account_ids_by_code = defaultdict(set)
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def _load_account_codes(self, account_codes):
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account_model = self.env['account.account']
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exact_codes = set()
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for account_code in account_codes:
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if account_code in self._account_ids_by_code:
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continue
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if account_code is None:
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# None means we want all accounts
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account_ids = account_model.\
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search([]).mapped('id')
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self._account_ids_by_code[account_code].update(account_ids)
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elif '%' in account_code:
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account_ids = account_model.\
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search([('code', 'like', account_code)]).mapped('id')
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self._account_ids_by_code[account_code].update(account_ids)
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else:
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# search exact codes after the loop to do less queries
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exact_codes.add(account_code)
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for account in account_model.\
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search([('code', 'in', list(exact_codes))]):
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self._account_ids_by_code[account.code].add(account.id)
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def _parse_match_object(self, mo):
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"""Split a match object corresponding to an accounting variable
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Returns field, mode, [account codes], (domain expression).
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"""
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field, mode, account_codes, domain = mo.groups()
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if not mode:
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mode = MODE_VARIATION
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elif mode == 's':
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mode = MODE_END
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if account_codes.startswith('_'):
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account_codes = account_codes[1:]
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else:
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account_codes = account_codes[1:-1]
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if account_codes.strip():
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account_codes = [a.strip() for a in account_codes.split(',')]
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else:
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account_codes = [None] # None means we want all accounts
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domain = domain or '[]'
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domain = tuple(safe_eval(domain))
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return field, mode, account_codes, domain
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def parse_expr(self, expr):
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"""Parse an expression, extracting accounting variables.
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Domains and accounts are extracted and stored in the map
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so when all expressions have been parsed, we know which
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account codes to query for each domain and mode.
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"""
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for mo in self.ACC_RE.finditer(expr):
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_, mode, account_codes, domain = self._parse_match_object(mo)
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key = (domain, mode)
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self._map_account_ids[key].update(account_codes)
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def done_parsing(self):
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"""Load account codes and replace account codes by
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account ids in map."""
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for key, account_codes in self._map_account_ids.items():
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# TODO _load_account_codes could be done
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# for all account_codes at once (also in v8)
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self._load_account_codes(account_codes)
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account_ids = set()
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for account_code in account_codes:
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account_ids.update(self._account_ids_by_code[account_code])
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self._map_account_ids[key] = list(account_ids)
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@classmethod
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def has_account_var(cls, expr):
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"""Test if an string contains an accounting variable."""
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return bool(cls.ACC_RE.search(expr))
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def get_aml_domain_for_expr(self, expr,
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date_from, date_to,
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target_move):
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""" Get a domain on account.move.line for an expression.
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Prerequisite: done_parsing() must have been invoked.
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Returns a domain that can be used to search on account.move.line.
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"""
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aml_domains = []
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date_domain_by_mode = {}
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for mo in self.ACC_RE.finditer(expr):
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field, mode, account_codes, domain = self._parse_match_object(mo)
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aml_domain = list(domain)
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account_ids = set()
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for account_code in account_codes:
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account_ids.update(self._account_ids_by_code[account_code])
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aml_domain.append(('account_id', 'in', tuple(account_ids)))
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if field == 'crd':
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aml_domain.append(('credit', '>', 0))
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elif field == 'deb':
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aml_domain.append(('debit', '>', 0))
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aml_domains.append(expression.normalize_domain(aml_domain))
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if mode not in date_domain_by_mode:
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date_domain_by_mode[mode] = \
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self.get_aml_domain_for_dates(date_from, date_to,
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mode, target_move)
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return expression.OR(aml_domains) + \
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expression.OR(date_domain_by_mode.values())
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def get_aml_domain_for_dates(self, date_from, date_to,
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mode,
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target_move):
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if mode == MODE_VARIATION:
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domain = [('date', '>=', date_from), ('date', '<=', date_to)]
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elif mode == MODE_INITIAL:
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domain = [('date', '<', date_from)]
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elif mode == MODE_END:
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domain = [('date', '<=', date_to)]
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if target_move == 'posted':
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domain.append(('move_id.state', '=', 'posted'))
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return expression.normalize_domain(domain)
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def do_queries(self, date_from, date_to,
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target_move, additional_move_line_filter=None):
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"""Query sums of debit and credit for all accounts and domains
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used in expressions.
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This method must be executed after done_parsing().
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"""
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aml_model = self.env['account.move.line']
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# {(domain, mode): {account_id: (debit, credit)}}
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self._data = defaultdict(dict)
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domain_by_mode = {}
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for key in self._map_account_ids:
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domain, mode = key
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if mode not in domain_by_mode:
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domain_by_mode[mode] = \
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self.get_aml_domain_for_dates(date_from, date_to,
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mode, target_move)
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domain = list(domain) + domain_by_mode[mode]
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domain.append(('account_id', 'in', self._map_account_ids[key]))
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if additional_move_line_filter:
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domain.extend(additional_move_line_filter)
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# fetch sum of debit/credit, grouped by account_id
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accs = aml_model.read_group(domain,
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['debit', 'credit', 'account_id'],
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['account_id'])
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for acc in accs:
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self._data[key][acc['account_id'][0]] = \
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(acc['debit'] or 0.0, acc['credit'] or 0.0)
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def replace_expr(self, expr):
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"""Replace accounting variables in an expression by their amount.
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Returns a new expression string.
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This method must be executed after do_queries().
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"""
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def f(mo):
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field, mode, account_codes, domain = self._parse_match_object(mo)
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key = (domain, mode)
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account_ids_data = self._data[key]
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v = AccountingNone
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for account_code in account_codes:
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account_ids = self._account_ids_by_code[account_code]
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for account_id in account_ids:
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debit, credit = \
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account_ids_data.get(account_id,
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(AccountingNone, AccountingNone))
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if field == 'bal':
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v += debit - credit
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elif field == 'deb':
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v += debit
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elif field == 'crd':
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v += credit
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return '(' + repr(v) + ')'
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return self.ACC_RE.sub(f, expr)
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