from __future__ import annotations
import asyncio
import datetime
from typing import Union, List, Optional, TYPE_CHECKING
from functools import wraps
import discord
from redbot.core.utils.chat_formatting import humanize_number
from . import Config, errors, commands
from .i18n import Translator
from .errors import BankPruneError
from .utils import AsyncIter
if TYPE_CHECKING:
from .bot import Red
_ = Translator("Bank API", __file__)
__all__ = [
"Account",
"get_balance",
"set_balance",
"withdraw_credits",
"deposit_credits",
"can_spend",
"transfer_credits",
"wipe_bank",
"get_account",
"is_global",
"set_global",
"get_bank_name",
"set_bank_name",
"get_currency_name",
"set_currency_name",
"get_default_balance",
"set_default_balance",
"get_max_balance",
"set_max_balance",
"cost",
"AbortPurchase",
"bank_prune",
]
_MAX_BALANCE = 2 ** 63 - 1
_DEFAULT_GLOBAL = {
"is_global": False,
"bank_name": "Twentysix bank",
"currency": "credits",
"default_balance": 100,
"max_balance": _MAX_BALANCE,
}
_DEFAULT_GUILD = {
"bank_name": "Twentysix bank",
"currency": "credits",
"default_balance": 100,
"max_balance": _MAX_BALANCE,
}
_DEFAULT_MEMBER = {"name": "", "balance": 0, "created_at": 0}
_DEFAULT_USER = _DEFAULT_MEMBER
_config: Config = None
def _init():
global _config
_config = Config.get_conf(None, 384734293238749, cog_name="Bank", force_registration=True)
_config.register_global(**_DEFAULT_GLOBAL)
_config.register_guild(**_DEFAULT_GUILD)
_config.register_member(**_DEFAULT_MEMBER)
_config.register_user(**_DEFAULT_USER)
[docs]class Account:
"""A single account.
This class should ONLY be instantiated by the bank itself."""
def __init__(self, name: str, balance: int, created_at: datetime.datetime):
self.name = name
self.balance = balance
self.created_at = created_at
def _encoded_current_time() -> int:
"""Get the current UTC time as a timestamp.
Returns
-------
int
The current UTC timestamp.
"""
now = datetime.datetime.utcnow()
return _encode_time(now)
def _encode_time(time: datetime.datetime) -> int:
"""Convert a datetime object to a serializable int.
Parameters
----------
time : datetime.datetime
The datetime to convert.
Returns
-------
int
The timestamp of the datetime object.
"""
ret = int(time.timestamp())
return ret
def _decode_time(time: int) -> datetime.datetime:
"""Convert a timestamp to a datetime object.
Parameters
----------
time : int
The timestamp to decode.
Returns
-------
datetime.datetime
The datetime object from the timestamp.
"""
return datetime.datetime.utcfromtimestamp(time)
[docs]async def get_balance(member: discord.Member) -> int:
"""Get the current balance of a member.
Parameters
----------
member : discord.Member
The member whose balance to check.
Returns
-------
int
The member's balance
"""
acc = await get_account(member)
return acc.balance
[docs]async def can_spend(member: discord.Member, amount: int) -> bool:
"""Determine if a member can spend the given amount.
Parameters
----------
member : discord.Member
The member wanting to spend.
amount : int
The amount the member wants to spend.
Returns
-------
bool
:code:`True` if the member has a sufficient balance to spend the
amount, else :code:`False`.
"""
if _invalid_amount(amount):
return False
return await get_balance(member) >= amount
[docs]async def set_balance(member: Union[discord.Member, discord.User], amount: int) -> int:
"""Set an account balance.
Parameters
----------
member : Union[discord.Member, discord.User]
The member whose balance to set.
amount : int
The amount to set the balance to.
Returns
-------
int
New account balance.
Raises
------
ValueError
If attempting to set the balance to a negative number.
RuntimeError
If the bank is guild-specific and a discord.User object is provided.
BalanceTooHigh
If attempting to set the balance to a value greater than
``bank._MAX_BALANCE``.
"""
if amount < 0:
raise ValueError("Not allowed to have negative balance.")
guild = getattr(member, "guild", None)
max_bal = await get_max_balance(guild)
if amount > max_bal:
currency = await get_currency_name(guild)
raise errors.BalanceTooHigh(
user=member.display_name, max_balance=max_bal, currency_name=currency
)
if await is_global():
group = _config.user(member)
else:
group = _config.member(member)
await group.balance.set(amount)
if await group.created_at() == 0:
time = _encoded_current_time()
await group.created_at.set(time)
if await group.name() == "":
await group.name.set(member.display_name)
return amount
def _invalid_amount(amount: int) -> bool:
return amount < 0
[docs]async def withdraw_credits(member: discord.Member, amount: int) -> int:
"""Remove a certain amount of credits from an account.
Parameters
----------
member : discord.Member
The member to withdraw credits from.
amount : int
The amount to withdraw.
Returns
-------
int
New account balance.
Raises
------
ValueError
If the withdrawal amount is invalid or if the account has insufficient
funds.
TypeError
If the withdrawal amount is not an `int`.
"""
if not isinstance(amount, int):
raise TypeError("Withdrawal amount must be of type int, not {}.".format(type(amount)))
if _invalid_amount(amount):
raise ValueError(
"Invalid withdrawal amount {} < 0".format(
humanize_number(amount, override_locale="en_US")
)
)
bal = await get_balance(member)
if amount > bal:
raise ValueError(
"Insufficient funds {} > {}".format(
humanize_number(amount, override_locale="en_US"),
humanize_number(bal, override_locale="en_US"),
)
)
return await set_balance(member, bal - amount)
[docs]async def deposit_credits(member: discord.Member, amount: int) -> int:
"""Add a given amount of credits to an account.
Parameters
----------
member : discord.Member
The member to deposit credits to.
amount : int
The amount to deposit.
Returns
-------
int
The new balance.
Raises
------
ValueError
If the deposit amount is invalid.
TypeError
If the deposit amount is not an `int`.
"""
if not isinstance(amount, int):
raise TypeError("Deposit amount must be of type int, not {}.".format(type(amount)))
if _invalid_amount(amount):
raise ValueError(
"Invalid deposit amount {} <= 0".format(
humanize_number(amount, override_locale="en_US")
)
)
bal = await get_balance(member)
return await set_balance(member, amount + bal)
[docs]async def transfer_credits(
from_: Union[discord.Member, discord.User],
to: Union[discord.Member, discord.User],
amount: int,
):
"""Transfer a given amount of credits from one account to another.
Parameters
----------
from_: Union[discord.Member, discord.User]
The member to transfer from.
to : Union[discord.Member, discord.User]
The member to transfer to.
amount : int
The amount to transfer.
Returns
-------
int
The new balance of the member gaining credits.
Raises
------
ValueError
If the amount is invalid or if ``from_`` has insufficient funds.
TypeError
If the amount is not an `int`.
RuntimeError
If the bank is guild-specific and a discord.User object is provided.
BalanceTooHigh
If the balance after the transfer would be greater than
``bank._MAX_BALANCE``.
"""
if not isinstance(amount, int):
raise TypeError("Transfer amount must be of type int, not {}.".format(type(amount)))
if _invalid_amount(amount):
raise ValueError(
"Invalid transfer amount {} <= 0".format(
humanize_number(amount, override_locale="en_US")
)
)
guild = getattr(to, "guild", None)
max_bal = await get_max_balance(guild)
if await get_balance(to) + amount > max_bal:
currency = await get_currency_name(guild)
raise errors.BalanceTooHigh(
user=to.display_name, max_balance=max_bal, currency_name=currency
)
await withdraw_credits(from_, amount)
return await deposit_credits(to, amount)
[docs]async def wipe_bank(guild: Optional[discord.Guild] = None) -> None:
"""Delete all accounts from the bank.
Parameters
----------
guild : discord.Guild
The guild to clear accounts for. If unsupplied and the bank is
per-server, all accounts in every guild will be wiped.
"""
if await is_global():
await _config.clear_all_users()
else:
await _config.clear_all_members(guild)
[docs]async def bank_prune(bot: Red, guild: discord.Guild = None, user_id: int = None) -> None:
"""Prune bank accounts from the bank.
Parameters
----------
bot : Red
The bot.
guild : discord.Guild
The guild to prune. This is required if the bank is set to local.
user_id : int
The id of the user whose account will be pruned.
If supplied this will prune only this user's bank account
otherwise it will prune all invalid users from the bank.
Raises
------
BankPruneError
If guild is :code:`None` and the bank is Local.
"""
global_bank = await is_global()
if global_bank:
_guilds = set()
_uguilds = set()
if user_id is None:
async for g in AsyncIter(bot.guilds, steps=100):
if not g.unavailable and g.large and not g.chunked:
_guilds.add(g)
elif g.unavailable:
_uguilds.add(g)
group = _config._get_base_group(_config.USER)
else:
if guild is None:
raise BankPruneError("'guild' can't be None when pruning a local bank")
if user_id is None:
_guilds = {guild} if not guild.unavailable and guild.large else set()
_uguilds = {guild} if guild.unavailable else set()
group = _config._get_base_group(_config.MEMBER, str(guild.id))
if user_id is None:
await bot.request_offline_members(*_guilds)
accounts = await group.all()
tmp = accounts.copy()
members = bot.get_all_members() if global_bank else guild.members
user_list = {str(m.id) for m in members if m.guild not in _uguilds}
async with group.all() as bank_data: # FIXME: use-config-bulk-update
if user_id is None:
for acc in tmp:
if acc not in user_list:
del bank_data[acc]
else:
user_id = str(user_id)
if user_id in bank_data:
del bank_data[user_id]
async def get_leaderboard(positions: int = None, guild: discord.Guild = None) -> List[tuple]:
"""
Gets the bank's leaderboard
Parameters
----------
positions : `int`
The number of positions to get
guild : discord.Guild
The guild to get the leaderboard of. If the bank is global and this
is provided, get only guild members on the leaderboard
Returns
-------
`list` of `tuple`
The sorted leaderboard in the form of :code:`(user_id, raw_account)`
Raises
------
TypeError
If the bank is guild-specific and no guild was specified
"""
if await is_global():
raw_accounts = await _config.all_users()
if guild is not None:
tmp = raw_accounts.copy()
for acc in tmp:
if not guild.get_member(acc):
del raw_accounts[acc]
else:
if guild is None:
raise TypeError("Expected a guild, got NoneType object instead!")
raw_accounts = await _config.all_members(guild)
sorted_acc = sorted(raw_accounts.items(), key=lambda x: x[1]["balance"], reverse=True)
if positions is None:
return sorted_acc
else:
return sorted_acc[:positions]
async def get_leaderboard_position(
member: Union[discord.User, discord.Member]
) -> Union[int, None]:
"""
Get the leaderboard position for the specified user
Parameters
----------
member : `discord.User` or `discord.Member`
The user to get the leaderboard position of
Returns
-------
`int`
The position of the user on the leaderboard
Raises
------
TypeError
If the bank is currently guild-specific and a `discord.User` object was passed in
"""
if await is_global():
guild = None
else:
guild = member.guild if hasattr(member, "guild") else None
try:
leaderboard = await get_leaderboard(None, guild)
except TypeError:
raise
else:
pos = discord.utils.find(lambda x: x[1][0] == member.id, enumerate(leaderboard, 1))
if pos is None:
return None
else:
return pos[0]
[docs]async def get_account(member: Union[discord.Member, discord.User]) -> Account:
"""Get the appropriate account for the given user or member.
A member is required if the bank is currently guild specific.
Parameters
----------
member : `discord.User` or `discord.Member`
The user whose account to get.
Returns
-------
Account
The user's account.
"""
if await is_global():
all_accounts = await _config.all_users()
else:
all_accounts = await _config.all_members(member.guild)
if member.id not in all_accounts:
acc_data = {"name": member.display_name, "created_at": _DEFAULT_MEMBER["created_at"]}
try:
acc_data["balance"] = await get_default_balance(member.guild)
except AttributeError:
acc_data["balance"] = await get_default_balance()
else:
acc_data = all_accounts[member.id]
acc_data["created_at"] = _decode_time(acc_data["created_at"])
return Account(**acc_data)
[docs]async def is_global() -> bool:
"""Determine if the bank is currently global.
Returns
-------
bool
:code:`True` if the bank is global, otherwise :code:`False`.
"""
return await _config.is_global()
[docs]async def set_global(global_: bool) -> bool:
"""Set global status of the bank.
.. important::
All accounts are reset when you switch!
Parameters
----------
global_ : bool
:code:`True` will set bank to global mode.
Returns
-------
bool
New bank mode, :code:`True` is global.
Raises
------
RuntimeError
If bank is becoming global and a `discord.Member` was not provided.
"""
if (await is_global()) is global_:
return global_
if await is_global():
await _config.clear_all_users()
else:
await _config.clear_all_members()
await _config.is_global.set(global_)
return global_
[docs]async def get_bank_name(guild: discord.Guild = None) -> str:
"""Get the current bank name.
Parameters
----------
guild : `discord.Guild`, optional
The guild to get the bank name for (required if bank is
guild-specific).
Returns
-------
str
The bank's name.
Raises
------
RuntimeError
If the bank is guild-specific and guild was not provided.
"""
if await is_global():
return await _config.bank_name()
elif guild is not None:
return await _config.guild(guild).bank_name()
else:
raise RuntimeError("Guild parameter is required and missing.")
[docs]async def set_bank_name(name: str, guild: discord.Guild = None) -> str:
"""Set the bank name.
Parameters
----------
name : str
The new name for the bank.
guild : `discord.Guild`, optional
The guild to set the bank name for (required if bank is
guild-specific).
Returns
-------
str
The new name for the bank.
Raises
------
RuntimeError
If the bank is guild-specific and guild was not provided.
"""
if await is_global():
await _config.bank_name.set(name)
elif guild is not None:
await _config.guild(guild).bank_name.set(name)
else:
raise RuntimeError("Guild must be provided if setting the name of a guild-specific bank.")
return name
[docs]async def get_currency_name(guild: discord.Guild = None) -> str:
"""Get the currency name of the bank.
Parameters
----------
guild : `discord.Guild`, optional
The guild to get the currency name for (required if bank is
guild-specific).
Returns
-------
str
The currency name.
Raises
------
RuntimeError
If the bank is guild-specific and guild was not provided.
"""
if await is_global():
return await _config.currency()
elif guild is not None:
return await _config.guild(guild).currency()
else:
raise RuntimeError("Guild must be provided.")
[docs]async def set_currency_name(name: str, guild: discord.Guild = None) -> str:
"""Set the currency name for the bank.
Parameters
----------
name : str
The new name for the currency.
guild : `discord.Guild`, optional
The guild to set the currency name for (required if bank is
guild-specific).
Returns
-------
str
The new name for the currency.
Raises
------
RuntimeError
If the bank is guild-specific and guild was not provided.
"""
if await is_global():
await _config.currency.set(name)
elif guild is not None:
await _config.guild(guild).currency.set(name)
else:
raise RuntimeError(
"Guild must be provided if setting the currency name of a guild-specific bank."
)
return name
[docs]async def get_max_balance(guild: discord.Guild = None) -> int:
"""Get the max balance for the bank.
Parameters
----------
guild : `discord.Guild`, optional
The guild to get the max balance for (required if bank is
guild-specific).
Returns
-------
int
The maximum allowed balance.
Raises
------
RuntimeError
If the bank is guild-specific and guild was not provided.
"""
if await is_global():
return await _config.max_balance()
elif guild is not None:
return await _config.guild(guild).max_balance()
else:
raise RuntimeError("Guild must be provided.")
[docs]async def set_max_balance(amount: int, guild: discord.Guild = None) -> int:
"""Set the maximum balance for the bank.
Parameters
----------
amount : int
The new maximum balance.
guild : `discord.Guild`, optional
The guild to set the max balance for (required if bank is
guild-specific).
Returns
-------
int
The new maximum balance.
Raises
------
RuntimeError
If the bank is guild-specific and guild was not provided.
ValueError
If the amount is less than 0 or higher than 2 ** 63 - 1.
"""
if not (0 < amount <= _MAX_BALANCE):
raise ValueError(
"Amount must be greater than zero and less than {max}.".format(
max=humanize_number(_MAX_BALANCE, override_locale="en_US")
)
)
if await is_global():
await _config.max_balance.set(amount)
elif guild is not None:
await _config.guild(guild).max_balance.set(amount)
else:
raise RuntimeError(
"Guild must be provided if setting the maximum balance of a guild-specific bank."
)
return amount
[docs]async def get_default_balance(guild: discord.Guild = None) -> int:
"""Get the current default balance amount.
Parameters
----------
guild : `discord.Guild`, optional
The guild to get the default balance for (required if bank is
guild-specific).
Returns
-------
int
The bank's default balance.
Raises
------
RuntimeError
If the bank is guild-specific and guild was not provided.
"""
if await is_global():
return await _config.default_balance()
elif guild is not None:
return await _config.guild(guild).default_balance()
else:
raise RuntimeError("Guild is missing and required!")
[docs]async def set_default_balance(amount: int, guild: discord.Guild = None) -> int:
"""Set the default balance amount.
Parameters
----------
amount : int
The new default balance.
guild : `discord.Guild`, optional
The guild to set the default balance for (required if bank is
guild-specific).
Returns
-------
int
The new default balance.
Raises
------
RuntimeError
If the bank is guild-specific and guild was not provided.
ValueError
If the amount is less than 0 or higher than the max allowed balance.
"""
amount = int(amount)
max_bal = await get_max_balance(guild)
if not (0 <= amount <= max_bal):
raise ValueError(
"Amount must be greater than or equal zero and less than or equal {max}.".format(
max=humanize_number(max_bal, override_locale="en_US")
)
)
if await is_global():
await _config.default_balance.set(amount)
elif guild is not None:
await _config.guild(guild).default_balance.set(amount)
else:
raise RuntimeError("Guild is missing and required.")
return amount
[docs]class AbortPurchase(Exception):
pass
[docs]def cost(amount: int):
"""
Decorates a coroutine-function or command to have a cost.
If the command raises an exception, the cost will be refunded.
You can intentionally refund by raising `AbortPurchase`
(this error will be consumed and not show to users)
Other exceptions will propagate and will be handled by Red's (and/or
any other configured) error handling.
"""
if not isinstance(amount, int) or amount < 0:
raise ValueError("This decorator requires an integer cost greater than or equal to zero")
def deco(coro_or_command):
is_command = isinstance(coro_or_command, commands.Command)
if not is_command and not asyncio.iscoroutinefunction(coro_or_command):
raise TypeError("@bank.cost() can only be used on commands or `async def` functions")
coro = coro_or_command.callback if is_command else coro_or_command
@wraps(coro)
async def wrapped(*args, **kwargs):
context: commands.Context = None
for arg in args:
if isinstance(arg, commands.Context):
context = arg
break
if not context.guild and not await is_global():
raise commands.UserFeedbackCheckFailure(
_("Can't pay for this command in DM without a global bank.")
)
try:
await withdraw_credits(context.author, amount)
except Exception:
credits_name = await get_currency_name(context.guild)
raise commands.UserFeedbackCheckFailure(
_("You need at least {cost} {currency} to use this command.").format(
cost=humanize_number(amount), currency=credits_name
)
)
else:
try:
return await coro(*args, **kwargs)
except AbortPurchase:
await deposit_credits(context.author, amount)
except Exception:
await deposit_credits(context.author, amount)
raise
if not is_command:
return wrapped
else:
wrapped.__module__ = coro_or_command.callback.__module__
coro_or_command.callback = wrapped
return coro_or_command
return deco
