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Initial commit.

Browse source 
This is enough code to start using the tool to debug itself,
so it's time to start committing individual bugfixes.
This commit is contained in:
Brett Smith 2020-11-18 15:57:38 -05:00
commit 2ff353bebb
16 changed files with 2157 additions and 0 deletions
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"""__init__.py - paypal_rest module initialization"""
# Copyright © 2020 Brett Smith
#
# 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 .client import (
PayPalAPIClient,
PayPalSite,
SubscriptionFields,
TransactionFields,
)

265
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"""client.py - PayPal API client class"""
# Copyright © 2020 Brett Smith
#
# 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/>.
import collections
import datetime
import enum
import functools
import logging
import math
import urllib.parse as urlparse
import requests
import requests_oauthlib # type:ignore[import]
from oauthlib import oauth2 # type:ignore[import]
from typing import (
Any,
Iterator,
Mapping,
Optional,
Sequence,
Type,
TypeVar,
Union,
)
from .paypal_types import (
APIResponse,
)
from .transaction import Transaction
FieldsType = TypeVar('FieldsType', bound='PayPalFields')
Params = Mapping[str, str]
class PayPalSite(enum.Enum):
SANDBOX = 'api-m.sandbox.paypal.com'
LIVE = 'api-m.paypal.com'
def url(self) -> str:
return f'https://{self.value}'
class PayPalFields(enum.Flag):
@classmethod
def choices(cls) -> Iterator[str]:
for flag in cls:
yield flag.name.lower()
@classmethod
def combine(cls: Type[FieldsType], fields: Optional[Sequence[FieldsType]]=None) -> FieldsType:
if fields:
fields_iter = iter(fields)
else:
fields_iter = iter(cls)
retval = next(fields_iter)
for field in fields_iter:
retval |= field
return retval
@classmethod
def from_arg(cls: Type[FieldsType], arg: str) -> FieldsType:
try:
return cls[arg.upper()]
except KeyError:
raise ValueError(f"unknown {cls.__name__} {arg!r}") from None
def is_base_field(self) -> bool:
return not math.log2(self.value) % 1
def _base_value(self) -> str:
return self.name.lower()
def param_value(self) -> str:
return ','.join(
flag._base_value()
for flag in type(self)
if flag & self and flag.is_base_field()
)
class SubscriptionFields(PayPalFields):
LAST_FAILED_PAYMENT = enum.auto()
PLAN = enum.auto()
ALL = LAST_FAILED_PAYMENT | PLAN
class TransactionFields(PayPalFields):
TRANSACTION = enum.auto()
PAYER = enum.auto()
SHIPPING = enum.auto()
AUCTION = enum.auto()
CART = enum.auto()
INCENTIVE = enum.auto()
STORE = enum.auto()
ALL = TRANSACTION | PAYER | SHIPPING | AUCTION | CART | INCENTIVE | STORE
def _base_value(self) -> str:
return f'{self.name.lower()}_info'
class PayPalSession(requests_oauthlib.OAuth2Session):
TOKEN_PATH = '/v1/oauth2/token'
def __init__(self, client: oauth2.Client, client_secret: str) -> None:
super().__init__(client=client)
self._client_secret = client_secret
def request(self, method: str, url: str, **kwargs: Any) -> requests.Response:
response = super().request(method, url, **kwargs)
if response.status_code == requests.codes.UNAUTHORIZED:
self.fetch_token(
token_url=urlparse.urljoin(url, self.TOKEN_PATH),
client_id=self._client.client_id,
client_secret=self._client_secret,
)
response = super().request(method, url, **kwargs)
return response
class PayPalAPIClient:
def __init__(
self,
session: requests.Session,
root_url: Union[str, PayPalSite]=PayPalSite.SANDBOX,
logger: Optional[logging.Logger]=None,
) -> None:
self._session = session
if isinstance(root_url, str):
self._root_url = root_url
else:
self._root_url = root_url.url()
if logger is None:
host_parts = urlparse.urlsplit(self._root_url).netloc.split('.')
host_parts.reverse()
logger_name = f'paypal_rest.PayPalAPIClient.{".".join(host_parts)}'
logger = logging.getLogger(logger_name)
self.logger = logger
@classmethod
def from_client_secret(
cls,
client_id: str,
client_secret: str,
root_url: Union[str, PayPalSite]=PayPalSite.SANDBOX,
logger: Optional[logging.Logger]=None,
) -> 'PayPalAPIClient':
client = oauth2.BackendApplicationClient(client_id=client_id)
session = PayPalSession(client, client_secret)
return cls(session, root_url, logger)
@classmethod
def from_config(
cls,
config: Mapping[str, str],
default_url: Union[str, PayPalSite]=PayPalSite.SANDBOX,
logger: Optional[logging.Logger]=None,
) -> 'PayPalAPIClient':
try:
client_id = config['client_id']
client_secret = config['client_secret']
except KeyError as error:
raise ValueError(f"configuration missing {error.args[0]!r}") from None
try:
root_url: Union[str, PayPalSite] = config['site']
except KeyError:
root_url = default_url
else:
try:
# In this case, we know root_url must be a str because we got
# it from the Mapping, but mypy doesn't track that.
root_url = PayPalSite[root_url.upper()] # type:ignore[union-attr]
except KeyError:
pass
return cls.from_client_secret(client_id, client_secret, root_url, logger)
def _get_json(self, path: str, params: Optional[Params]=None) -> APIResponse:
url = urlparse.urljoin(self._root_url, path)
response = self._session.get(url, params=params)
try:
response.raise_for_status()
except requests.HTTPError:
self._log_error(response.json())
raise
else:
return response.json()
def _iter_pages(self, path: str, params: Params) -> Iterator[APIResponse]:
response: APIResponse = {'page': 0, 'total_pages': 1}
page_params = collections.ChainMap(params).new_child()
while response['page'] < response['total_pages']:
page_params['page'] = str(response['page'] + 1)
response = self._get_json(path, page_params)
yield response
def _log_error(self, error: APIResponse) -> None:
parts = [
'{name}: {message}'.format_map(error),
*('{issue} (in {location})'.format_map(detail)
for detail in error.get('details', ())),
]
self.logger.error(" — ".join(parts))
def get_subscription(
self,
subscription_id: str,
fields: SubscriptionFields=SubscriptionFields.ALL,
) -> APIResponse:
return self._get_json(f'/v1/billing/subscriptions/{subscription_id}', {
'fields': fields.param_value(),
})
def get_transaction(
self,
transaction_id: str,
end_date: Optional[datetime.datetime]=None,
start_date: Optional[datetime.datetime]=None,
fields: TransactionFields=TransactionFields.TRANSACTION,
) -> APIResponse:
now = datetime.datetime.now(datetime.timezone.utc)
if end_date is None:
end_date = now
if start_date is None:
# The API only goes back three years
start_date = now - datetime.timedelta(days=365 * 3)
date_diff = datetime.timedelta(days=30)
response: APIResponse = {'transaction_details': None}
while end_date > start_date and not response['transaction_details']:
search_start = max(end_date - date_diff, start_date)
response = self._get_json('/v1/reporting/transactions', {
'transaction_id': transaction_id,
'fields': fields.param_value(),
'start_date': search_start.isoformat(timespec='seconds'),
'end_date': end_date.isoformat(timespec='seconds'),
})
end_date = search_start
if response['transaction_details']:
return Transaction(response['transaction_details'][0])
else:
raise ValueError(f"transaction {transaction_id!r} not found")
def iter_transactions(
self,
start_date: datetime.datetime,
end_date: datetime.datetime,
fields: TransactionFields=TransactionFields.TRANSACTION,
) -> Iterator[Transaction]:
for page in self._iter_pages('/v1/reporting/transactions', {
'fields': fields.param_value(),
'start_date': start_date.isoformat(timespec='seconds'),
'end_date': end_date.isoformat(timespec='seconds'),
}):
for txn_source in page['transaction_details']:
yield Transaction(txn_source)

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#!/usr/bin/env python3
"""cliquery.py - Command line tool to query PayPal transactions and subscriptions"""
# Copyright © 2020 Brett Smith
#
# 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/>.
import argparse
import collections
import datetime
import logging
import sys
from pathlib import Path
import yaml
from . import client as clientmod
from . import cliutil
from . import config as configmod
from . import paypal_types
from .transaction import CartItem, Transaction
from typing import (
Optional,
Sequence,
TextIO,
Type,
)
PROGNAME = 'paypal-query'
logger = logging.getLogger('paypal_rest.cliquery')
class YAMLDumper(yaml.SafeDumper):
TRANSACTION_FIELD_ORDER = [
clientmod.TransactionFields.SHIPPING,
clientmod.TransactionFields.PAYER,
clientmod.TransactionFields.TRANSACTION,
clientmod.TransactionFields.CART,
clientmod.TransactionFields.STORE,
clientmod.TransactionFields.AUCTION,
clientmod.TransactionFields.INCENTIVE,
]
@classmethod
def add_transaction_representer(cls, fields: clientmod.TransactionFields) -> None:
txn_key_order = [
f'{flag.name.lower()}_info'
for flag in cls.TRANSACTION_FIELD_ORDER
if flag & fields
]
def transaction_representer(self: 'YAMLDumper', data: Transaction) -> yaml.nodes.MappingNode:
return self.represent_dict((key, data[key]) for key in txn_key_order)
cls.add_representer(Transaction, transaction_representer)
def add_fields_argument(
parser: argparse.ArgumentParser,
field_type: Type[clientmod.PayPalFields],
*short_flags: str,
) -> argparse.Action:
type_name = field_type.__name__[:-6].lower()
return parser.add_argument(
f'--{type_name}-fields', *short_flags,
action='append',
metavar='FIELD',
type=field_type.from_arg,
help=f"Only show these field(s) in {type_name} results."
" You can specify this option multiple times."
f" Choices are {', '.join(field_type.choices())}."
)
def parse_arguments(arglist: Optional[Sequence[str]]=None) -> argparse.Namespace:
parser = argparse.ArgumentParser(prog=PROGNAME)
cliutil.add_version_argument(parser)
parser.add_argument(
'--config-file', '-C',
type=Path,
metavar='PATH',
help="""Read client configuration from this INI file
""")
parser.add_argument(
'--config-section', '-c',
default='query',
help="""Read client configuration from this section of the config file
""")
parser.add_argument(
'--begin', '--start', '-b',
dest='start_date',
metavar='DATETIME',
type=paypal_types.parse_datetime,
help="""Datetime to begin the search, in ISO 8601 format
""")
parser.add_argument(
'--end', '--stop', '-e',
dest='end_date',
metavar='DATETIME',
type=paypal_types.parse_datetime,
help="""Datetime to end the search, in ISO 8601 format
""")
add_fields_argument(parser, clientmod.TransactionFields, '--txn-fields', '-T')
add_fields_argument(parser, clientmod.SubscriptionFields, '--sub-fields', '-S')
parser.add_argument(
'paypal_ids',
metavar='ID',
nargs='*',
help="""ID of PayPal object(s) to look up and return. If no IDs are
specified, lists all transactions in your specified date range (default last
24 hours).
""")
cliutil.add_loglevel_argument(parser)
args = parser.parse_args(arglist)
args.transaction_fields = clientmod.TransactionFields.combine(args.transaction_fields)
args.subscription_fields = clientmod.SubscriptionFields.combine(args.subscription_fields)
if args.end_date is None:
args.end_date = datetime.datetime.now(datetime.timezone.utc)
return args
def summarize_transaction(txn: Transaction, stream: TextIO) -> None:
date_s = txn.updated_date().astimezone(datetime.timezone.utc).strftime('%Y-%m-%d %H:%M')
status = txn.status().value
try:
from_s = f"\t{txn.payer_fullname()} ({txn.payer_email()})"
except KeyError:
from_s = ""
print(f"{date_s}\t{txn.transaction_id()}\t{status}{from_s}", file=stream)
cart = list(txn.cart_items())
if not cart:
txn_name = txn['transaction_info'].get('transaction_subject', "Gross Amount")
txn_amt = txn.amount()
cart.append(CartItem(None, txn_name, None, 1, txn_amt, txn_amt))
fee_amt = txn.fee_amount()
cart.append(CartItem(None, "PayPal Fee", None, 1, fee_amt, fee_amt))
names = [
item.name or item.description or item.code or "Unknown Item"
for item in cart
]
amounts = [str(item.total_price) for item in cart]
name_len = max(len(name) for name in names)
amt_len = max(len(amt_s) for amt_s in amounts)
line_fmt = f' {{:>{name_len}}} │ {{:>{amt_len}}}{{}}'
for item, name, amt_s in zip(cart, names, amounts):
if item.quantity != 1:
unit_s = f" ({item.quantity:,g} @ {item.unit_price})"
else:
unit_s = ""
print(line_fmt.format(name, amt_s, unit_s), file=stream)
def main(
arglist: Optional[Sequence[str]]=None,
stdout: TextIO=sys.stdout,
stderr: TextIO=sys.stderr,
) -> int:
args = parse_arguments(arglist)
cliutil.set_loglevel(logger, args.loglevel)
config = configmod.load_config(args.config_file)
if args.config_section not in config:
config.add_section(args.config_section)
paypal = clientmod.PayPalAPIClient.from_config(config[args.config_section])
if not args.paypal_ids:
if args.start_date is None:
args.start_date = args.end_date - datetime.timedelta(hours=24)
args.transaction_fields |= clientmod.TransactionFields.TRANSACTION
for txn in paypal.iter_transactions(
args.start_date, args.end_date, args.transaction_fields,
):
summarize_transaction(txn, stdout)
else:
YAMLDumper.add_transaction_representer(args.transaction_fields)
for paypal_id in args.paypal_ids:
paypal_id = paypal_id.upper()
paypal_obj: paypal_types.APIResponse
if paypal_id.startswith('I-'):
paypal_obj = paypal.get_subscription(paypal_id, fields=args.subscription_fields)
else:
paypal_obj = paypal.get_transaction(
paypal_id, args.end_date, args.start_date, args.transaction_fields,
)
yaml.dump(paypal_obj, stdout, Dumper=YAMLDumper)
return 0
entry_point = cliutil.make_entry_point(__name__, PROGNAME)
if __name__ == '__main__':
exit(entry_point())

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"""cliutil - Utilities for CLI tools"""
PKGNAME = 'paypal_rest'
LICENSE = """
Copyright © 2020 Brett Smith
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/>."""
import argparse
import enum
import logging
import operator
import os
import pkg_resources
import signal
import sys
import traceback
import types
from pathlib import Path
import requests
from typing import (
Any,
Callable,
Iterator,
NoReturn,
Optional,
Sequence,
TextIO,
Type,
Union,
)
VERSION = pkg_resources.require(PKGNAME)[0].version
class ExceptHook:
def __init__(self, logger: Optional[logging.Logger]=None) -> None:
if logger is None:
logger = logging.getLogger()
self.logger = logger
def __call__(self,
exc_type: Type[BaseException],
exc_value: BaseException,
exc_tb: types.TracebackType,
) -> NoReturn:
error_type = type(exc_value).__name__
msg = ": ".join(str(arg) for arg in exc_value.args)
if isinstance(exc_value, KeyboardInterrupt):
signal.signal(signal.SIGINT, signal.SIG_DFL)
os.kill(0, signal.SIGINT)
signal.pause()
elif isinstance(exc_value, requests.HTTPError):
error_type = "PayPal API error"
if exc_value.response is None:
status_code = 500
else:
status_code = exc_value.response.status_code
if (status_code == requests.codes.UNAUTHORIZED
or status_code == requests.codes.FORBIDDEN):
exitcode = os.EX_NOPERM
elif status_code < 500:
exitcode = os.EX_SOFTWARE
else:
exitcode = os.EX_UNAVAILABLE
elif isinstance(exc_value, OSError):
if exc_value.filename is None:
exitcode = os.EX_OSERR
error_type = "OS error"
msg = exc_value.strerror
else:
# There are more specific exit codes for input problems vs.
# output problems, but without knowing how the file was
# intended to be used, we can't use them.
exitcode = os.EX_IOERR
error_type = "I/O error"
msg = f"{exc_value.filename}: {exc_value.strerror}"
else:
exitcode = os.EX_SOFTWARE
error_type = f"internal {error_type}"
self.logger.critical("%s%s%s", error_type, ": " if msg else "", msg)
self.logger.debug(
''.join(traceback.format_exception(exc_type, exc_value, exc_tb)),
)
raise SystemExit(exitcode)
class InfoAction(argparse.Action):
def __call__(self,
parser: argparse.ArgumentParser,
namespace: argparse.Namespace,
values: Union[Sequence[Any], str, None]=None,
option_string: Optional[str]=None,
) -> NoReturn:
if isinstance(self.const, str):
info = self.const
exitcode = 0
else:
info, exitcode = self.const
print(info)
raise SystemExit(exitcode)
class LogLevel(enum.IntEnum):
DEBUG = logging.DEBUG
INFO = logging.INFO
WARNING = logging.WARNING
ERROR = logging.ERROR
CRITICAL = logging.CRITICAL
WARN = WARNING
ERR = ERROR
CRIT = CRITICAL
@classmethod
def from_arg(cls, arg: str) -> int:
try:
return cls[arg.upper()].value
except KeyError:
raise ValueError(f"unknown loglevel {arg!r}") from None
@classmethod
def choices(cls) -> Iterator[str]:
for level in sorted(cls, key=operator.attrgetter('value')):
yield level.name.lower()
def add_loglevel_argument(parser: argparse.ArgumentParser,
default: LogLevel=LogLevel.INFO) -> argparse.Action:
return parser.add_argument(
'--loglevel',
metavar='LEVEL',
default=default.value,
type=LogLevel.from_arg,
help="Show logs at this level and above."
f" Specify one of {', '.join(LogLevel.choices())}."
f" Default {default.name.lower()}.",
)
def add_version_argument(parser: argparse.ArgumentParser) -> argparse.Action:
progname = parser.prog or sys.argv[0]
return parser.add_argument(
'--version', '--copyright', '--license',
action=InfoAction,
nargs=0,
const=f"{progname} version {VERSION}\n{LICENSE}",
help="Show program version and license information",
)
def make_entry_point(mod_name: str, prog_name: str=sys.argv[0]) -> Callable[[], int]:
"""Create an entry_point function for a tool
The returned function is suitable for use as an entry_point in setup.py.
It sets up the root logger and excepthook, then calls the module's main
function.
"""
def entry_point(): # type:ignore
prog_mod = sys.modules[mod_name]
setup_logger()
prog_mod.logger = logging.getLogger(prog_name)
sys.excepthook = ExceptHook(prog_mod.logger)
return prog_mod.main()
return entry_point
def setup_logger(logger: Union[str, logging.Logger]='',
stream: TextIO=sys.stderr,
fmt: str='%(name)s: %(levelname)s: %(message)s',
) -> logging.Logger:
"""Set up a logger with a StreamHandler with the given format"""
if isinstance(logger, str):
logger = logging.getLogger(logger)
formatter = logging.Formatter(fmt)
handler = logging.StreamHandler(stream)
handler.setFormatter(formatter)
logger.addHandler(handler)
return logger
def set_loglevel(logger: logging.Logger, loglevel: int=logging.INFO) -> None:
"""Set the loglevel for a tool or module
If the given logger is not under a hierarchy, this function sets the
loglevel for the root logger, along with some specific levels for libraries
used by reporting tools. Otherwise, it's the same as
``logger.setLevel(loglevel)``.
"""
if '.' not in logger.name:
logger = logging.getLogger()
logger.setLevel(loglevel)

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"""config.py - Load user configuration for PayPal API client"""
# Copyright © 2020 Brett Smith
#
# 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/>.
import configparser
from pathlib import Path
from xdg import BaseDirectory # type:ignore[import]
from typing import (
Union,
)
CONFIG_PATH = Path('paypal_rest', 'config.ini')
def load_config(path: Union[Path, str, None]=None) -> configparser.ConfigParser:
if path is None:
path = BaseDirectory.load_first_config(str(CONFIG_PATH))
if path is None:
# This path doesn't exist, but we'll handle that case later.
path = Path(BaseDirectory.xdg_config_home, CONFIG_PATH)
config = configparser.ConfigParser()
with open(path) as config_file:
config.read_file(config_file)
return config

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"""errors.py - PayPal API client exception classes"""
# Copyright © 2020 Brett Smith
#
# 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/>.
class MissingFieldError(KeyError):
pass

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paypal_rest/paypal_types.py Normal file
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"""paypal_types.py - Common types and classes across the PayPal API"""
# Copyright © 2020 Brett Smith
#
# 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/>.
import datetime
from decimal import Decimal
from typing import (
Any,
Callable,
Mapping,
NamedTuple,
)
# Declare a type definition for the one function of iso8601 that we use.
import iso8601 # type:ignore[import]
parse_datetime: Callable[[str], datetime.datetime] = iso8601.parse_date
APIResponse = Mapping[str, Any]
class Amount(NamedTuple):
number: Decimal
currency: str
@classmethod
def from_api(cls, source: APIResponse) -> 'Amount':
return cls(
Decimal(source['value']),
source['currency_code'],
)
def __str__(self) -> str:
return '{:,g} {}'.format(*self)

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paypal_rest/transaction.py Normal file
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"""transaction.py - High-level access to PayPal transactions"""
# Copyright © 2020 Brett Smith
#
# 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/>.
import enum
from . import errors
from decimal import Decimal
from typing import (
Any,
Callable,
Iterable,
Iterator,
NamedTuple,
Optional,
TypeVar,
Union,
)
from .paypal_types import (
Amount,
APIResponse,
parse_datetime,
)
T = TypeVar('T')
class CartItem(NamedTuple):
code: Optional[str]
name: Optional[str]
description: Optional[str]
quantity: Union[int, Decimal]
unit_price: Amount
total_price: Amount
@classmethod
def from_api(cls, source: APIResponse) -> 'CartItem':
total_price = Amount.from_api(source['item_amount'])
quantity = Decimal(source.get('item_quantity', 1))
try:
unit_price = Amount.from_api(source['item_unit_price'])
except KeyError:
unit_price = total_price._replace(number=total_price.number / quantity)
return cls(
source.get('item_code'),
source.get('item_name'),
source.get('item_description'),
quantity,
unit_price,
total_price,
)
class TransactionStatus(enum.Enum):
D = "Denied"
DENIED = D
F = "Partially Refunded"
REFUNDED = F
P = "Pending"
PENDING = P
S = "Successful"
SUCCESSFUL = S
SUCCESS = S
V = "Reversed"
REVERSED = V
class Transaction(APIResponse):
__slots__ = ['_response']
def __init__(self, response: APIResponse) -> None:
self._response = response
def __getitem__(self, key: str) -> Any:
return self._response[key]
def __iter__(self) -> Iterator[str]:
return iter(self._response)
def __len__(self) -> int:
return len(self._response)
def _from_response( # type:ignore[misc]
func: Callable[[Any], T],
*keys: str,
) -> Callable[['Transaction'], T]:
def _load_from_response(self: 'Transaction') -> T:
source = self._response
for index, key in enumerate(keys):
try:
source = source[key]
except KeyError as error:
if source is self._response:
raise errors.MissingFieldError(
f"transaction was not loaded with {error.args[0]!r} field",
) from None
else:
key_s = '→'.join(repr(key) for key in keys[:index + 1])
raise KeyError(f"Transaction {key_s}") from None
return func(source)
return _load_from_response
def _cart_items(cart_info: APIResponse) -> Iterator[CartItem]: # type:ignore[misc]
try:
item_seq = cart_info['item_details']
except KeyError:
pass
else:
for source in item_seq:
try:
yield CartItem.from_api(source)
except KeyError:
pass
amount = _from_response(
Amount.from_api,
'transaction_info',
'transaction_amount',
)
cart_items = _from_response(_cart_items, 'cart_info')
fee_amount = _from_response(Amount.from_api, 'transaction_info', 'fee_amount')
initiation_date = _from_response(
parse_datetime,
'transaction_info',
'transaction_initiation_date',
)
payer_email = _from_response(str, 'payer_info', 'email_address')
payer_fullname = _from_response(str, 'payer_info', 'payer_name', 'alternate_full_name')
status = _from_response(
TransactionStatus.__getitem__,
'transaction_info',
'transaction_status',
)
transaction_id = _from_response(str, 'transaction_info', 'transaction_id')
updated_date = _from_response(
parse_datetime,
'transaction_info',
'transaction_updated_date',
)

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[aliases]
test=pytest
typecheck=pytest --addopts="--mypy paypal_rest"
[mypy]
disallow_any_unimported = False
disallow_untyped_calls = False
disallow_untyped_defs = True
show_error_codes = True
strict_equality = True
warn_redundant_casts = True
warn_return_any = False
warn_unreachable = True
warn_unused_configs = True
[tool:pytest]
filterwarnings =
ignore::DeprecationWarning:^socks$
[tox:tox]
envlist = py36,py37
[testenv]
commands =
./setup.py test
./setup.py typecheck

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#!/usr/bin/env python3
"""setup.py - paypal_rest installation script"""
# Copyright © 2020 Brett Smith
#
# 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 setuptools import setup
setup(
name='paypal_rest',
description="Library to access PayPal's REST API",
version='0.9.0',
author='Software Freedom Conservancy',
author_email='info@sfconservancy.org',
license='GNU AGPLv3+',
install_requires=[
'iso8601>=0.1', # Debian:python3-iso8601
'oauthlib>=2.0', # Debian:python3-oauthlib
'pyxdg>=0.2', # Debian:python3-xdg
'requests>=2.0', # Debian:python3-requests
'requests-oauthlib>=1.0', # Debian:python3-requests-oauthlib
],
setup_requires=[
'pytest-mypy',
'pytest-runner', # Debian:python3-pytest-runner
],
tests_require=[
'mypy>=0.770', # Debian:python3-mypy
'pytest', # Debian:python3-pytest
],
packages=[
'paypal_rest',
],
entry_points={
'console_scripts': [
'paypal-query = paypal_rest.cliquery:entry_point',
],
},
)

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"""__init__.py - paypal_rest unit test common functionality"""
# Copyright © 2020 Brett Smith
#
# 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/>.
import itertools
import typing
import urllib.parse as urlparse
import requests
FLOAT_NUMBERS = [
'1200.30',
'255.75',
'99.99',
'5.00',
'0.00',
]
FLOAT_NUMBERS.extend(f'-{s}' for s in FLOAT_NUMBERS[:-1])
WHOLE_NUMBERS = [
'1250',
'255',
'99',
'5',
'0',
]
WHOLE_NUMBERS.extend(f'-{s}' for s in WHOLE_NUMBERS[:-1])
class ReceivedRequest(typing.NamedTuple):
method: str
url: urlparse.ParseResult
params: typing.Mapping[str, str]
@classmethod
def from_args(cls, method, url, params):
return cls(
method,
urlparse.urlparse(url),
dict(params or ()),
)
class MockResponse:
def __init__(self, body, status_code=requests.codes.OK):
self._body = body
self.status_code = status_code
@classmethod
def error(
cls,
name='TEST_ERROR',
message='Test error',
debug_id='0000',
status_code=requests.codes.BAD_REQUEST,
*details,
**kwargs,
):
body = {
'name': name,
'message': message,
'debug_id': debug_id,
'details': [{'issue': issue, 'location': 'test'}
for issue in details],
}
body.update(kwargs)
return cls(body, status_code)
def json(self):
return self._body.copy()
def raise_for_status(self):
if self.status_code >= 400:
raise requests.HTTPError(self.status_code)
class MockSession:
LAST_RESPONSE = MockResponse({
'name': 'NO_RESPONSE',
'message': 'MockSession got more requests than expected',
}, 509)
def __init__(self, *responses, infinite=False):
self._requests = []
if infinite:
self._responses = itertools.cycle(responses)
else:
self._responses = itertools.chain(
responses,
itertools.repeat(self.LAST_RESPONSE),
)
def request(self, method, url, params=None):
self._requests.append(ReceivedRequest.from_args(method, url, params))
return next(self._responses)
def get(self, url, params=None):
return self.request('GET', url, params)

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"""test_client.py - Unit tests for PayPal API client class"""
# Copyright © 2020 Brett Smith
#
# 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/>.
import datetime
import re
import pytest
import requests
from . import MockSession, MockResponse
from paypal_rest import client as client_mod
from paypal_rest import transaction as txn_mod
START_DATE = datetime.datetime(2020, 10, 1, 12, tzinfo=datetime.timezone.utc)
END_DATE = START_DATE.replace(month=START_DATE.month + 1)
def test_transaction_type():
txn_id = 'TYPETEST123456789'
session = MockSession(
MockResponse({'page': 1, 'total_pages': 1, 'transaction_details': [
{'transaction_info': {'transaction_id': txn_id}},
]}),
)
paypal = client_mod.PayPalAPIClient(session)
txn, = paypal.iter_transactions(START_DATE, END_DATE)
assert isinstance(txn, txn_mod.Transaction)
assert txn.transaction_id() == txn_id
@pytest.mark.parametrize('pages', range(1, 4))
def test_transaction_pagination(pages):
session = MockSession(
*(MockResponse({'page': page, 'total_pages': pages, 'transaction_details': []})
for page in range(1, pages + 1))
)
paypal = client_mod.PayPalAPIClient(session)
actual = list(paypal.iter_transactions(START_DATE, END_DATE))
assert len(session._requests) == pages
for expect_page, request in enumerate(session._requests, 1):
assert request.params.get('page') == str(expect_page)
@pytest.mark.parametrize('index,key', enumerate(['start_date', 'end_date']))
def test_transaction_date_formatting(index, key):
session = MockSession(
MockResponse({'page': 1, 'total_pages': 1, 'transaction_details': []}),
)
paypal = client_mod.PayPalAPIClient(session)
args = [START_DATE, END_DATE]
new_date = START_DATE.replace(day=15)
args[index] = new_date
actual = list(paypal.iter_transactions(*args))
assert session._requests
assert session._requests[0].params.get(key) == new_date.isoformat(timespec='seconds')
@pytest.mark.parametrize('fields', [
{'transaction'},
{'cart'},
{'transaction', 'payer'},
{'cart', 'transaction', 'payer'},
])
def test_transaction_fields_formatting(fields):
fields_iter = (name.upper() for name in fields)
fields_arg = client_mod.TransactionFields[next(fields_iter)]
for name in fields_iter:
fields_arg |= client_mod.TransactionFields[name]
session = MockSession(
MockResponse({'page': 1, 'total_pages': 1, 'transaction_details': []}),
)
paypal = client_mod.PayPalAPIClient(session)
_ = list(paypal.iter_transactions(START_DATE, END_DATE, fields_arg))
assert session._requests
assert fields == {
re.sub(r'_info$', '', name)
for name in session._requests[0].params.get('fields', '').split(',')
}
@pytest.mark.parametrize('name', [
'BAD_REQUEST',
'UNAUTHORIZED',
'FORBIDDEN',
'NOT_FOUND',
'INTERNAL_SERVER_ERROR',
])
def test_error_handling(name, caplog):
session = MockSession(MockResponse.error(name, status_code=requests.codes[name]))
paypal = client_mod.PayPalAPIClient(session)
with pytest.raises(requests.HTTPError):
paypal.get_transaction('ABCDEFGHIJKLMNOPQ')
assert any(
log.levelname == 'ERROR'
and log.message == f'{name}: Test error'
for log in caplog.records
)

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"""test_paypal_types.py - Unit tests for common PayPal API classes"""
# Copyright © 2020 Brett Smith
#
# 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/>.
import itertools
from decimal import Decimal
import pytest
from . import FLOAT_NUMBERS, WHOLE_NUMBERS
from paypal_rest import paypal_types
@pytest.mark.parametrize('number,currency', itertools.product(
FLOAT_NUMBERS, ['USD', 'INR'],
))
def test_float_amount_from_api(number, currency):
source = {'value': number, 'currency_code': currency}
actual = paypal_types.Amount.from_api(source)
assert actual.number == Decimal(number)
assert actual.currency == currency
@pytest.mark.parametrize('number,currency', itertools.product(
WHOLE_NUMBERS, ['JPY', 'CLP'],
))
def test_whole_amount_from_api(number, currency):
source = {'value': number, 'currency_code': currency}
actual = paypal_types.Amount.from_api(source)
assert actual.number == int(number)
assert actual.currency == currency

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"""test_transaction.py - Unit tests for high-level Transaction access"""
# Copyright © 2020 Brett Smith
#
# 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/>.
import datetime
import re
from decimal import Decimal
import pytest
import requests
from . import MockSession, MockResponse, FLOAT_NUMBERS, WHOLE_NUMBERS
from paypal_rest import errors
from paypal_rest import transaction as txn_mod
DATE1 = datetime.datetime(2020, 10, 2, 14, 15, 16, tzinfo=datetime.timezone.utc)
DATE2 = DATE1.replace(second=56)
def item_source(
name=None,
description=None,
code=None,
quantity=1,
number='15.99',
currency='USD',
):
if description is None:
description = name
if code is None:
code = name
total_number = str(quantity * Decimal(number))
retval = {
'item_quantity': str(quantity),
'item_unit_price': {'value': number, 'currency_code': currency},
'item_item_amount': {'value': total_number, 'currency_code': currency},
'item_amount': {'value': total_number, 'currency_code': currency},
}
if name is not None:
retval['item_name'] = name
if description is not None:
retval['item_description'] = description
if code is not None:
retval['item_code'] = code
return retval
def cart_info(*item_kwargs):
return {'item_details': [item_source(**kwargs) for kwargs in item_kwargs]}
def payer_info(
given_name='Payer',
surname='Smith',
account_id='PAYER12345678',
payer_status='Y',
address_status='Y',
country_code='US',
email_address='payer@example.org',
):
retval = locals().copy()
del retval['given_name'], retval['surname']
retval['payer_name'] = {
'given_name': given_name,
'surname': surname,
'alternate_full_name': f'{given_name} {surname}',
}
return retval
def transaction_info(
transaction_id='TRANSACTION123456',
number='5.00',
currency='USD',
fee_number='-0.49',
fee_currency=None,
init_date=DATE1,
update_date=None,
status='S',
subject=None,
note=None,
):
retval = {
'transaction_id': transaction_id,
'transaction_status': status,
'transaction_initiation_date': init_date.isoformat(timespec='seconds'),
'transaction_updated_date': (update_date or init_date).isoformat(timespec='seconds'),
'transaction_amount': {'value': number, 'currency_code': currency},
'fee_amount': {'value': fee_number, 'currency_code': fee_currency or currency},
}
if subject is not None:
retval['transaction_subject'] = subject
if note is not None:
retval['transaction_note'] = note
return retval
def test_mapping():
source = {
'transaction_info': transaction_info(),
'payer_info': payer_info(),
}
txn = txn_mod.Transaction(source.copy())
assert len(txn) == len(source)
assert frozenset(txn) == frozenset(source)
assert txn == source
assert txn.get('test_key') is None
@pytest.mark.parametrize('number', FLOAT_NUMBERS)
def test_amount_float(number):
source = transaction_info(number=number, currency='USD')
txn = txn_mod.Transaction({'transaction_info': source})
assert txn.amount() == (Decimal(number), 'USD')
@pytest.mark.parametrize('number', WHOLE_NUMBERS)
def test_amount_whole(number):
source = transaction_info(number=number, currency='JPY')
txn = txn_mod.Transaction({'transaction_info': source})
assert txn.amount() == (int(number), 'JPY')
def test_cart_items():
source = cart_info(
{'number': '5.99'},
{'name': 'Test', 'number': '7.99', 'quantity': 2},
)
txn = txn_mod.Transaction({'cart_info': source})
item1, item2 = txn.cart_items()
item1_price = (Decimal('5.99'), 'USD')
assert item1 == (
None, None, None, 1, item1_price, item1_price,
)
assert item2 == (
'Test', 'Test', 'Test', 2,
(Decimal('7.99'), 'USD'),
(Decimal('15.98'), 'USD'),
)
def test_cart_empty():
txn = txn_mod.Transaction({'cart_info': {}})
assert not any(txn.cart_items())
def test_cart_quantity_only():
# Refunds are structured this way.
source = {'item_details': [{'item_quantity': '1.000'}]}
txn = txn_mod.Transaction({'cart_info': source})
assert not any(txn.cart_items())
@pytest.mark.parametrize('number', FLOAT_NUMBERS)
def test_fee_amount_float(number):
source = transaction_info(fee_number=number, fee_currency='USD')
txn = txn_mod.Transaction({'transaction_info': source})
assert txn.fee_amount() == (Decimal(number), 'USD')
@pytest.mark.parametrize('number', WHOLE_NUMBERS)
def test_fee_amount_whole(number):
source = transaction_info(fee_number=number, fee_currency='JPY')
txn = txn_mod.Transaction({'transaction_info': source})
assert txn.fee_amount() == (int(number), 'JPY')
def test_payer_email():
email = 'test@example.net'
source = payer_info(email_address=email)
txn = txn_mod.Transaction({'payer_info': source})
assert txn.payer_email() == email
@pytest.mark.parametrize('given_name', ['Robin', 'Sawyer'])
def test_payer_fullname(given_name):
txn = txn_mod.Transaction({'payer_info': payer_info(given_name)})
assert txn.payer_fullname() == f'{given_name} Smith'
def test_initiation_date():
source = transaction_info(init_date=DATE2)
txn = txn_mod.Transaction({'transaction_info': source})
assert txn.initiation_date() == DATE2
@pytest.mark.parametrize('key', 'DFPSV')
def test_status(key):
source = transaction_info(status=key)
txn = txn_mod.Transaction({'transaction_info': source})
assert txn.status() is txn_mod.TransactionStatus[key]
def test_transaction_id():
test_id = 'TESTTXNID12345678'
source = transaction_info(transaction_id=test_id)
txn = txn_mod.Transaction({'transaction_info': source})
assert txn.transaction_id() == test_id
def test_updated_date():
source = transaction_info(update_date=DATE2)
txn = txn_mod.Transaction({'transaction_info': source})
assert txn.updated_date() == DATE2
@pytest.mark.parametrize('method_name', [
'amount',
'cart_items',
'fee_amount',
'payer_email',
'payer_fullname',
'initiation_date',
'status',
'transaction_id',
'updated_date',
])
def test_info_missing(method_name):
txn = txn_mod.Transaction({})
with pytest.raises(errors.MissingFieldError):
getattr(txn, method_name)()