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fiobank.py
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fiobank.py
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from decimal import Decimal
import re
from datetime import datetime, date
import warnings
import requests
__all__ = ("FioBank", "ThrottlingError")
def coerce_date(value):
if isinstance(value, datetime):
return value.date()
elif isinstance(value, date):
return value
else:
return datetime.strptime(value[:10], "%Y-%m-%d").date()
def sanitize_value(value, convert=None):
if isinstance(value, str):
value = value.strip() or None
if convert and value is not None:
return convert(value)
return value
class ThrottlingError(Exception):
"""Throttling error raised when api is being used too fast."""
def __str__(self):
return "Token should be used only once per 30s."
class FioBank(object):
base_url = "https://fioapi.fio.cz/v1/rest/"
actions = {
"periods": "periods/{token}/{from_date}/{to_date}/transactions.json",
"by-id": "by-id/{token}/{year}/{number}/transactions.json",
"last": "last/{token}/transactions.json",
"set-last-id": "set-last-id/{token}/{from_id}/",
"set-last-date": "set-last-date/{token}/{from_date}/",
}
_amount_re = re.compile(r"\-?\d+(\.\d+)? [A-Z]{3}")
def __init__(self, token, decimal=False):
self.token = token
if decimal:
self.float_type = Decimal
else:
warnings.warn(
(
"Using float for money can cause inaccuracies. "
"Use FioBank(..., decimal=True) for Decimal objects instead. "
"This will be the default in the future versions."
),
DeprecationWarning,
)
self.float_type = float
# http://www.fio.cz/xsd/IBSchema.xsd
self.transaction_schema = {
"column0": ("date", coerce_date),
"column1": ("amount", self.float_type),
"column2": ("account_number", str),
"column3": ("bank_code", str),
"column4": ("constant_symbol", str),
"column5": ("variable_symbol", str),
"column6": ("specific_symbol", str),
"column7": ("user_identification", str),
"column8": ("type", str),
"column9": ("executor", str),
"column10": ("account_name", str),
"column12": ("bank_name", str),
"column14": ("currency", str),
"column16": ("recipient_message", str),
"column17": ("instruction_id", str),
"column18": ("specification", str),
"column22": ("transaction_id", str),
"column25": ("comment", str),
"column26": ("bic", str),
"column27": ("reference", str),
}
self.info_schema = {
"accountid": ("account_number", str),
"bankid": ("bank_code", str),
"currency": ("currency", str),
"iban": ("iban", str),
"bic": ("bic", str),
"closingbalance": ("balance", self.float_type),
}
def _request(self, action, **params):
template = self.base_url + self.actions[action]
url = template.format(token=self.token, **params)
response = requests.get(url)
if response.status_code == requests.codes["conflict"]:
raise ThrottlingError()
response.raise_for_status()
if response.content:
return response.json(parse_float=self.float_type)
return None
def _parse_info(self, data):
# parse data from API
info = {}
for key, value in data["accountStatement"]["info"].items():
key = key.lower()
if key in self.info_schema:
field_name, convert = self.info_schema[key]
value = sanitize_value(value, convert)
info[field_name] = value
# make some refinements
self._add_account_number_full(info)
# return data
return info
def _parse_transactions(self, data):
schema = self.transaction_schema
try:
entries = data["accountStatement"]["transactionList"]["transaction"] # NOQA
except TypeError:
entries = []
for entry in entries:
# parse entry from API
trans = {}
for column_name, column_data in entry.items():
if not column_data:
continue
field_name, convert = schema[column_name.lower()]
value = sanitize_value(column_data["value"], convert)
trans[field_name] = value
# add missing fileds with None values
for column_data_name, (field_name, convert) in schema.items():
trans.setdefault(field_name, None)
# make some refinements
specification = trans.get("specification")
is_amount = self._amount_re.match
if specification is not None and is_amount(specification):
amount, currency = trans["specification"].split(" ")
trans["original_amount"] = self.float_type(amount)
trans["original_currency"] = currency
else:
trans["original_amount"] = None
trans["original_currency"] = None
self._add_account_number_full(trans)
# generate transaction data
yield trans
def _add_account_number_full(self, obj):
account_number = obj.get("account_number")
bank_code = obj.get("bank_code")
if account_number is not None and bank_code is not None:
account_number_full = "{}/{}".format(account_number, bank_code)
else:
account_number_full = None
obj["account_number_full"] = account_number_full
def info(self):
today = date.today()
data = self._request("periods", from_date=today, to_date=today)
return self._parse_info(data)
def period(self, from_date, to_date):
data = self._request(
"periods", from_date=coerce_date(from_date), to_date=coerce_date(to_date)
)
return self._parse_transactions(data)
def statement(self, year, number):
data = self._request("by-id", year=year, number=number)
return self._parse_transactions(data)
def last(self, from_id=None, from_date=None):
if from_id and from_date:
raise ValueError("Only one constraint is allowed.")
if from_id:
self._request("set-last-id", from_id=from_id)
elif from_date:
self._request("set-last-date", from_date=coerce_date(from_date))
return self._parse_transactions(self._request("last"))