WIP: Wallets

classes/__init__.py

@@ -1,3 +1,4 @@
 from .pycord_guild import PycordGuild
 from .pycord_guild_colors import PycordGuildColors
 from .pycord_user import PycordUser
+from .wallet import Wallet

classes/errors/wallet.py

@@ -0,0 +1,10 @@
+class WalletNotFoundError(Exception):
+    """Wallet could not find user with such an ID from a guild in the database"""
+
+    def __init__(self, owner_id: int, guild_id: int) -> None:
+        self.owner_id = owner_id
+        self.guild_id = guild_id
+
+        super().__init__(
+            f"Wallet of a user with id {self.owner_id} was not found for the guild with id {self.guild_id}"
+        )

classes/pycord_user.py

@@ -1,6 +1,7 @@
 import logging
 from dataclasses import dataclass
-from typing import Dict, Any, Optional
+from logging import Logger
+from typing import Any, Dict, Optional
 
 from bson import ObjectId
 from libbot.cache.classes import Cache
@@ -8,8 +9,9 @@ from pymongo.results import InsertOneResult
 
 from classes.errors.pycord_user import UserNotFoundError
 from modules.database import col_users
+from classes import Wallet
 
-logger = logging.getLogger(__name__)
+logger: Logger = logging.getLogger(__name__)
 
 
 @dataclass
@@ -131,7 +133,7 @@ class PycordUser:
         cache.delete(self._get_cache_key())
 
     @staticmethod
-    def get_defaults(user_id: int | None = None) -> Dict[str, Any]:
+    def get_defaults(user_id: Optional[int] = None) -> Dict[str, Any]:
         return {
             "id": user_id,
         }
@@ -151,3 +153,14 @@ class PycordUser:
         """
         await col_users.delete_one({"_id": self._id})
         self._delete_cache(cache)
+
+    async def get_wallet(self, guild_id: int) -> Wallet:
+        """Get wallet of the user.
+
+        Args:
+            guild_id (int): Guild ID of the wallet
+
+        Returns:
+            Wallet: Wallet object of the user
+        """
+        return await Wallet.from_id(self.id, guild_id)

classes/wallet.py

@@ -1,15 +1,104 @@
+import logging
 from dataclasses import dataclass
-from datetime import datetime
+from datetime import datetime, timezone
+from logging import Logger
+from typing import Any, Dict, Optional
 
 from bson import ObjectId
+from pymongo.results import InsertOneResult
+
+from classes.errors import WalletNotFoundError
+from modules.database import col_wallets
+
+logger: Logger = logging.getLogger(__name__)
 
 
 @dataclass
 class Wallet:
     _id: ObjectId
-    id: int
-    balance: float
     owner_id: int
     guild_id: int
+    balance: float
     is_frozen: bool
     created: datetime
+
+    # TODO Write a docstring
+    @classmethod
+    async def from_id(
+        cls, owner_id: int, guild_id: int, allow_creation: bool = True
+    ) -> "Wallet":
+        db_entry = await col_wallets.find_one(
+            {"owner_id": owner_id, "guild_id": guild_id}
+        )
+
+        if db_entry is None:
+            if not allow_creation:
+                raise WalletNotFoundError(owner_id, guild_id)
+
+            db_entry = Wallet.get_defaults(owner_id, guild_id)
+
+            insert_result: InsertOneResult = await col_wallets.insert_one(db_entry)
+
+            db_entry["_id"] = insert_result.inserted_id
+
+        return cls(**db_entry)
+
+    def _to_dict(self) -> Dict[str, Any]:
+        return {
+            "_id": self._id,
+            "owner_id": self.owner_id,
+            "guild_id": self.guild_id,
+            "balance": self.balance,
+            "is_frozen": self.is_frozen,
+            "created": self.created,
+        }
+
+    async def _set(self, key: str, value: Any) -> None:
+        if not hasattr(self, key):
+            raise AttributeError()
+
+        setattr(self, key, value)
+
+        await col_wallets.update_one(
+            {"_id": self._id}, {"$set": {key: value}}, upsert=True
+        )
+
+        logger.info(
+            "Set attribute '%s' of the wallet %s to '%s'", key, str(self._id), value
+        )
+
+    @staticmethod
+    def get_defaults(
+        owner_id: Optional[int] = None, guild_id: Optional[int] = None
+    ) -> Dict[str, Any]:
+        return {
+            "owner_id": owner_id,
+            "guild_id": guild_id,
+            "balance": 0.0,
+            "is_frozen": False,
+            "created": datetime.now(tz=timezone.utc),
+        }
+
+    @staticmethod
+    def get_default_value(key: str) -> Any:
+        if key not in Wallet.get_defaults():
+            raise KeyError(f"There's no default value for key '{key}' in Wallet")
+
+        return Wallet.get_defaults()[key]
+
+    # TODO Write a docstring
+    async def freeze(self) -> None:
+        await self._set("is_frozen", True)
+
+    # TODO Write a docstring
+    async def unfreeze(self) -> None:
+        await self._set("is_frozen", False)
+
+    # TODO Write a dosctring
+    async def deposit(self, amount: float) -> None:
+        await self._set("balance", round(self.balance + amount, 2))
+
+    # TODO Add a check to prevent negative balances
+    # TODO Write a dosctring
+    async def withdraw(self, amount: float) -> None:
+        await self._set("balance", round(self.balance - amount, 2))

modules/database.py

@@ -25,6 +25,7 @@ db_client = AsyncClient(con_string)
 db: AsyncDatabase = db_client.get_database(name=db_config["name"])
 
 col_users: AsyncCollection = db.get_collection("users")
+col_wallets: AsyncCollection = db.get_collection("wallets")
 # col_messages: AsyncCollection = db.get_collection("messages")
 # col_warnings: AsyncCollection = db.get_collection("warnings")
 # col_checkouts: AsyncCollection = db.get_collection("checkouts")
@@ -33,4 +34,7 @@ col_users: AsyncCollection = db.get_collection("users")
 # col_transactions: AsyncCollection = db.get_collection("transactions")
 
 # Update indexes
-db.dispatch.get_collection("users").create_index("id", unique=True)
+db.dispatch.get_collection("users").create_index("id", unique=True)
+db.dispatch.get_collection("wallets").create_index(
+    ["owner_id", "guild_id"], unique=False
+)