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# coding=utf-8 |
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import logging |
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from abc import ABCMeta, abstractmethod |
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from typing import List, Dict |
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logger = logging.getLogger(__name__) |
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class Division: |
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def __init__(self, id: int, name: str, league: int, threshold: float): |
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self.id = id |
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self.name = name |
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self.league = league |
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self.threshold = threshold |
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class PlayerDivisionInfo: |
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def __init__(self, user_id: int, current_league: int, current_score: float): |
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self.user_id = user_id |
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self.league = current_league |
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self.score = current_score |
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def is_in_inferior_league(self, compared_to: 'PlayerDivisionInfo') -> bool: |
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return self.league < compared_to.league |
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def is_in_superior_league(self, compared_to: 'PlayerDivisionInfo') -> bool: |
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return self.league > compared_to.league |
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def __str__(self): |
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return "PlayerDivisionInfo(user_id=%s, league=%s, score=%s)" % (self.user_id, self.league, self.score) |
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class DivisionPersistor(ABCMeta): |
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""" |
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Interface for the persistance layer |
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""" |
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@abstractmethod |
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def add_player(self, player: 'PlayerDivisionInfo') -> None: |
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""" |
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Add a new player to the persistance layer |
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:param player: new player with zero score and initial league |
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""" |
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pass |
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@abstractmethod |
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def update_player(self, player: 'PlayerDivisionInfo') -> None: |
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""" |
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Update a player after a game (league, score, games) |
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:param player: updated player |
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""" |
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pass |
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class DivisionService: |
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""" |
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Division service calculates changes to the ladder leagues & divisions after each game |
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""" |
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def __init__(self, divisions: List['Division'], player_division_infos: List['PlayerDivisionInfo'], |
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persistor: 'DivisionPersistor'): |
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self.divisions = divisions |
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self.players = dict() # type: Dict[int, 'PlayerDivisionInfo'] |
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self.persistor = persistor |
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for info in player_division_infos: |
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self.players[info.user_id] = info |
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def add_player(self, player_id: int) -> None: |
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logger.debug("Added new player %s to divisions", player_id) |
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self.players[player_id] = PlayerDivisionInfo(player_id, 1, 0.0) |
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self.persistor.add_player(self.players[player_id]) |
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def update_player_score(self, player: PlayerDivisionInfo, new_score: float) -> None: |
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logger.debug("Update score for %s to %s", player) |
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player.score = new_score |
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self.persistor.update_player(player) |
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def promote_player(self, player): |
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logger.info("%s got promoted to league %s", player, player.league + 1) |
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player.score = 0.0 |
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player.league += 1 |
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self.persistor.update_player(player) |
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def post_result(self, player_one: int, player_two: int, player_one_has_won: bool) -> None: |
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if player_one not in self.players: |
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self.add_player(player_one) |
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if player_two not in self.players: |
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self.add_player(player_two) |
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winner = self.players[player_one] if player_one_has_won else self.players[player_two] |
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loser = self.players[player_two] if player_one_has_won else self.players[player_one] |
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if winner.is_in_inferior_league(loser): |
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gain = 1.5 |
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loss = 1.0 |
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elif winner.is_in_superior_league(loser): |
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gain = 0.5 |
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loss = 0.5 |
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else: |
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gain = 1.0 |
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loss = 0.5 |
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logger.debug("%s won against %s - gain: %s - loss: %s", winner, loser, gain, loss) |
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if winner.score + gain > self.max_league_threshold(winner.league): |
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self.promote_player(winner) |
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else: |
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self.update_player_score(winner, winner.score + gain) |
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self.update_player_score(loser, max(0.0, loser.score - loss)) |
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def get_player_division(self, player_id: int) -> 'Division': |
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player = self.players[player_id] |
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return self.get_division(player.league, player.score) |
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def max_league_threshold(self, league: int) -> float: |
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return max([x.threshold for x in self.divisions if x.league == league]) |
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def get_division(self, league: int, score: float) -> Division: |
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divisions_of_league = [x for x in self.divisions if x.league == league] |
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for division in sorted(divisions_of_league, key=lambda d: d.threshold): |
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if division.threshold > score: |
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return division |
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logger.error("league %s has no division for score %s", league, score) |
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return None |
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2. Missing __init__.py files
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__init__.pyfiles in your module folders. Make sure that you place one file in each sub-folder.