ledger-pyreport/ledger_pyreport/ledger.py

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# ledger-pyreport
# Copyright © 2020 Lee Yingtong Li (RunasSudo)
#
# 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 <https://www.gnu.org/licenses/>.
from .config import config
from .model import *
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import csv
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from datetime import datetime, timedelta
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from decimal import Decimal
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import hashlib
import re
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import subprocess
# Helper commands to run Ledger
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def run_ledger(*args):
ledger_args = ['ledger', '--args-only', '--file', config['ledger_file'], '--date-format', '%Y-%m-%d', '--unround'] + config['ledger_args'] + list(args)
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proc = subprocess.Popen(ledger_args, encoding='utf-8', stdout=subprocess.PIPE, stderr=subprocess.PIPE)
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stdout, stderr = proc.communicate()
if stderr:
raise Exception(stderr)
return stdout
def run_ledger_date(date, *args):
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if date is None:
return run_ledger(*args)
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return run_ledger('--end', (date + timedelta(days=1)).strftime('%Y-%m-%d'), *args)
# General financial logic
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def financial_year(date):
pstart = date.replace(day=1, month=7)
if pstart > date:
pstart = pstart.replace(year=pstart.year - 1)
return pstart
# Ledger logic
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csv.register_dialect('ledger', doublequote=False, escapechar='\\', strict=True)
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RE_COMMODITY1 = re.compile(r'([0123456789.,-]+)( *)(.+)')
RE_COMMODITY2 = re.compile(r'(.+?)( *)([0123456789.,-]+)')
def parse_amount(amount):
if '{' in amount:
amount_str = amount[:amount.index('{')].strip()
price_str = amount[amount.index('{')+1:amount.index('}')].strip()
else:
amount_str = amount
price_str = None
if amount_str[0] in list('0123456789-'):
# Commodity follows number
result = RE_COMMODITY1.match(amount_str)
amount_num = Decimal(result.group(1).replace(',', ''))
commodity = Commodity(result.group(3).strip('"'), False, len(result.group(2)) > 0)
else:
# Commodity precedes number
result = RE_COMMODITY2.match(amount_str)
amount_num = Decimal(result.group(3).replace(',', ''))
commodity = Commodity(result.group(1).strip('"'), True, len(result.group(2)) > 0)
if price_str:
commodity.price = parse_amount(price_str)
return Amount(amount_num, commodity)
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def get_pricedb():
output = run_ledger('prices', '--prices-format', '%(quoted(format_date(date))),%(quoted(display_account)),%(quoted(display_amount))\n')
prices = []
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reader = csv.reader(output.splitlines(), dialect='ledger')
for date_str, commodity, price_str in reader:
prices.append((datetime.strptime(date_str, '%Y-%m-%d'), commodity.strip('"'), parse_amount(price_str)))
return prices
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def raw_transactions_at_date(date):
ledger = Ledger(date)
ledger.prices = get_pricedb()
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output = run_ledger_date(date, 'csv', '--csv-format', '%(quoted(parent.id)),%(quoted(format_date(date))),%(quoted(parent.code)),%(quoted(payee)),%(quoted(account)),%(quoted(display_amount)),%(quoted(comment)),%(quoted(state)),%(quoted(note))\n')
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uuids = set()
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reader = csv.reader(output.splitlines(True), dialect='ledger')
for trn_id, date_str, code, payee, account_str, amount_str, comment, state_str, note_str in reader:
if not ledger.transactions or trn_id != ledger.transactions[-1].id:
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if trn_id in uuids:
digest = hashlib.sha256()
digest.update(trn_id.encode('utf-8'))
digest.update(date_str.encode('utf-8'))
digest.update(payee.encode('utf-8'))
uuid = digest.hexdigest()
else:
uuid = trn_id
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metadata = {}
for line in note_str.splitlines():
line = line.strip()
if ': ' in line:
metadata[line.split(': ')[0]] = line.split(': ')[1].strip()
transaction = Transaction(ledger, trn_id, datetime.strptime(date_str, '%Y-%m-%d'), payee, code, uuid, metadata)
ledger.transactions.append(transaction)
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uuids.add(uuid)
else:
# Transaction ID matches: continuation of previous transaction
transaction = ledger.transactions[-1]
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if ';' in comment:
comment = comment[comment.index(';')+1:].strip()
amount = parse_amount(amount_str)
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posting = Posting(transaction, ledger.get_account(account_str), amount, comment=comment, state=Posting.State(int(state_str)))
transaction.postings.append(posting)
if amount.commodity.name not in ledger.commodities:
ledger.commodities[amount.commodity.name] = amount.commodity.strip_price()
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ledger.transactions.sort(key=lambda t: t.date)
return ledger