Rough guide to using my ruleswrapper.py class to hard-code certain rules in beancount-import.
See the example config - add the ruleswrapper as the data source, and specify the module to be wrapped as wrapped_module.
Any configuration parameters meant for the wrapped module should be added to the config passed to ruleswrapper.
Code may not compile exactly as-is - roughly edited to remove sensitive data.
TODO:
ruleswrapper.py can be shared more easily| data_sources = [ | |
| dict( | |
| module=ruleswrapper.__name__, | |
| wrapped_module=plaid.__name__, | |
| dbfile=os.path.join(data_dir, 'plaid/transactions.db'), | |
| earliest_date=datetime.date(2019, 1, 1) | |
| #dir=os.path.join(data_dir, 'plaid/') | |
| ), |
| from typing import Any, Dict, List, OrderedDict | |
| import re | |
| from beancount.core.data import Posting, Transaction, Balance | |
| from beancount_import.journal_editor import JournalEditor | |
| from beancount_import.source import LogFunction, Source, SourceResults, SourceSpec | |
| import importlib | |
| import numbers | |
| from beancount.core.number import MISSING, D, ZERO | |
| def instr(needle): | |
| return lambda hay: needle in hay | |
| RULES=[ | |
| { | |
| 'criteria': [ | |
| ("name", lambda n: re.match(r'^(amazon|AMZNGrcy|AMZN Mktp)', n, re.I) is not None), | |
| ], | |
| 'attributes': { | |
| 'payee': "Amazon", | |
| 'account': "Expenses:FIXME", | |
| } | |
| }, | |
| { | |
| 'criteria': [ | |
| ("name" , lambda n: re.search(r'uber eats', n, re.I)), | |
| ("amount", lambda a: abs(a.number) == D('5') ), | |
| ], | |
| 'attributes': { | |
| 'payee': 'Uber Eats', | |
| 'tags': ['tips'], | |
| } | |
| }, | |
| { # WITHDRAWAL TRANSFER TO LOAN 0001 | |
| 'criteria': [ | |
| ("name" , lambda n: re.search(r'TRANSFER TO LOAN', n, re.I) is not None), | |
| ("account_id", lambda i: i == "pzZp6rN8J3XSJq1Jxq" ), | |
| ], | |
| 'attributes': { | |
| 'payee': 'Auto Loan Payment', | |
| 'account': 'Assets:Payments:Auto:ThatCar', | |
| } | |
| }, | |
| { 'criteria': [ ("name", instr("WHOLEFDS") ) ], 'attributes': { 'payee': 'Whole Foods' }}, | |
| { 'criteria': [ ("name", instr("CHIPOTLE") ) ], 'attributes': { 'payee': 'Chipotle', 'narration': '', 'account': "Expenses:Food:Restaurants" }}, | |
| { 'criteria': [ ("name", instr(" CAVA ") ) ], 'attributes': { 'payee': 'Cava', 'narration': '', 'account': "Expenses:Food:Restaurants" }}, | |
| { 'criteria': [ ("name", "AUTOPAY PAYMENT - THANK YOU" ) ], 'attributes': { 'payee': "Credit Card Payment" } }, | |
| { 'criteria': [ ("name", "AUTOMATIC PAYMENT - THANK" ) ], 'attributes': { 'payee': 'Credit Card Payment' } }, | |
| { 'criteria': [ ("name", "CHASE CREDIT CRD AUTOPAY" ) ], 'attributes': { 'payee': 'Credit Card Payment' } }, | |
| { 'criteria': [ ("name", instr("YouTubePremium") ) ], 'attributes': { 'payee': "YouTube Premium" , 'narration': None, 'account': 'Expenses:Entertainment:Music' } }, | |
| ] | |
| def matches_all_criteria( plaid_entry: dict, rule: dict ): | |
| for criteria in rule['criteria']: | |
| attr, logic = criteria | |
| if attr == "plaid": | |
| value = plaid_entry | |
| elif attr == "name": | |
| value = plaid_entry.get( 'plaid_name', plaid_entry.get('plaid_pending_name', plaid_entry.get('ofx_name') ) ) | |
| else: | |
| value = plaid_entry.get( attr ) | |
| # can't match the criteria if there's no value for the specified attribute | |
| # can't match ALL criteria if one doesn't match | |
| if not value: | |
| return False | |
| if callable(logic): | |
| match = logic( value ) | |
| elif isinstance(logic, str): | |
| match = ( value.lower() == logic.lower() ) | |
| elif isinstance(logic, numbers.Number): | |
| match = ( value == D(str(value)) ) | |
| else: | |
| raise RuntimeError("Unsupported match criteria type: %s" % type(logic)) | |
| # can't match ALL criteria if one doesn't match | |
| if not match: | |
| return False | |
| return True | |
| def match_rules( posting: Posting ) -> List[Dict[str, Any]]: | |
| entry_dict:OrderedDict[str, Any] = posting.meta | |
| apply = [] | |
| for rule in RULES: | |
| match = matches_all_criteria( entry_dict, rule ) | |
| if not match: continue | |
| apply.append( rule['attributes'] ) | |
| return apply | |
| def merge_rule_attributes( to_apply: list ) -> Dict[str, Any]: | |
| merged: Dict[str, Any] = { | |
| 'payee': None, | |
| 'narration': None, | |
| 'account': None, | |
| 'tags': set(), | |
| 'flag': None, | |
| } | |
| for apply in to_apply: | |
| for attr, value in apply.items(): | |
| if not attr in merged: | |
| raise RuntimeError("Plaid module: Rule updates unknown attribute [%s]" % attr) | |
| if isinstance( merged[attr], set ): | |
| if isinstance( value, str ): value = [ value ] | |
| for v in value: | |
| merged[attr].add( v ) | |
| else: | |
| merged[attr] = value | |
| # remove unset entries so the logic below can use .get(attr, DEFAULT) | |
| return dict([(k,v) for k,v in merged.items() if v is not None]) | |
| def load(spec: SourceSpec, log_status: LogFunction): | |
| if not 'wrapped_module' in spec: | |
| raise Exception("ruleswrapper source requires wrapped_module specifying the module being wrapped") | |
| original_module = importlib.import_module(spec.pop('wrapped_module')) | |
| loaded: Source = original_module.load(spec, log_status) | |
| old_prepare = loaded.prepare | |
| def new_prepare(journal: JournalEditor, results: SourceResults): | |
| old_prepare(journal, results) | |
| for result in results.pending: # Type: ImportResult | |
| for i, entry in enumerate(result.entries): # Type: Directive | |
| if type(entry) != Transaction: | |
| # only supports Transactions, although it might make sense | |
| # to extend to other types of Directives | |
| continue | |
| # current logic assumes a single Posting with an account | |
| # owned by this source, and a single Posting with an account | |
| # not owned by this source - any more than that, and not sure | |
| # how to proceed | |
| owned_postings = list(filter(lambda p: p.account in results.accounts, entry.postings)) | |
| other_postings = list(filter(lambda p: p.account not in results.accounts, entry.postings)) | |
| if len(owned_postings) != 1 or len(other_postings) != 1: | |
| log_status("Unable to process rules - needed 1 owned posting and 1 other posting, got: %d owned, %d other" % (len(owned_postings), len(other_postings))) | |
| continue | |
| matches = match_rules( owned_postings[0] ) | |
| if matches: | |
| rule_overrides = merge_rule_attributes( matches ) | |
| other_postings = [ | |
| Posting( | |
| account = rule_overrides.get('account', other_postings[0].account), | |
| units = other_postings[0].units, | |
| cost = other_postings[0].cost, | |
| price = other_postings[0].price, | |
| flag = other_postings[0].flag, | |
| meta = other_postings[0].meta, | |
| ) | |
| ] | |
| result.entries[i] = Transaction( | |
| meta = entry.meta, | |
| date = entry.date, | |
| flag = entry.flag, | |
| payee = rule_overrides.get('payee', entry.payee), | |
| narration = rule_overrides.get('narration', entry.narration), | |
| tags = rule_overrides.get('tags', entry.tags), | |
| links = entry.links, | |
| postings = [ | |
| owned_postings[0], | |
| other_postings[0] | |
| ] | |
| ) | |
| # result.entries = list(filter(lambda e: e is not None, result.entries)) | |
| loaded.prepare = new_prepare | |
| return loaded | |