Unify the way alerts and users are handled on the DB side
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@@ -19,7 +19,7 @@ class Alert:
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self.region: Region = region
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self.price: int = price
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self._loaded: bool = False
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self._users: List[pdb.User] = []
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self.users: List[pdb.User] = []
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@classmethod
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def from_item(cls, primary_key: int, sort_key: str, users: List[int]) -> 'Alert':
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@@ -82,18 +82,15 @@ class Alert:
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await self.get(table, consistent=consistent)
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async def _append_user(self, table: Table, user: pdb.User) -> None:
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self._users.append(user)
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self.users.append(user)
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await self.put(table)
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async def _remove_user(self, table: Table, user: pdb.User) -> None:
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update_expression = F("users").delete({user.user_id})
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await table.update_item(
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key=self.key,
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update_expression=update_expression
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)
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self.users.remove(user)
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await self.put(table)
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async def put(self, table: Table) -> None:
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user_ids = [str(user.user_id) for user in self._users]
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user_ids = [str(user.user_id) for user in self.users]
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await table.put_item(
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item={
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self.primary_key_name: self.primary_key,
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@@ -110,23 +107,23 @@ class Alert:
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)
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except ItemNotFound:
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return False
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self._users = [pdb.User(int(user_id)) for user_id in response['users']]
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self.users = [pdb.User(int(user_id)) for user_id in response['users']]
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self._loaded = True
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return True
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async def get_users(self, table: Table, consistent: bool = False) -> List[pdb.User]:
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await self._lazy_load(table, consistent=consistent)
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return self._users
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return self.users
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async def add_user(self, table: Table, user: pdb.User, consistent: bool = False) -> None:
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await self._lazy_load(table, consistent=consistent)
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if user not in self._users:
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if user not in self.users:
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await self._append_user(table=table, user=user)
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async def remove_user(self, table: Table, user: pdb.User, consistent: bool = True) -> None:
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await self._lazy_load(table, consistent=consistent)
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if user in self._users:
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if user in self.users:
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await self._remove_user(table=table, user=user)
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@@ -59,9 +59,6 @@ class User:
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async def delete(self, table: Table) -> None:
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if not self._loaded:
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await self._lazy_load(table, consistent=True)
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if self.subscribed_alerts:
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for alert in self.subscribed_alerts:
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await alert.remove_user(table, self)
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await table.delete_item(
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key={self.primary_key_name: self.primary_key},
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)
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@@ -80,3 +77,15 @@ class User:
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self.subscribed_alerts.append(pdb.Alert.from_str(string_trinity))
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self.region = Region(response['region'])
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return True
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async def add_alert(self, table: Table, alert: 'pdb.Alert', consistent: bool = False) -> None:
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await self._lazy_load(table, consistent=consistent)
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if alert not in self.subscribed_alerts:
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self.subscribed_alerts.append(alert)
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await self.put(table)
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async def remove_alert(self, table: Table, alert: 'pdb.Alert', consistent: bool = True) -> None:
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await self._lazy_load(table, consistent=consistent)
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if alert in self.subscribed_alerts:
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self.subscribed_alerts.remove(alert)
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await self.put(table)
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