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fetcher.py
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fetcher.py
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from collections import defaultdict
from csv import (reader as csv_reader,
writer as csv_writer,
DictReader,
DictWriter)
from datetime import datetime
from pprint import pprint
from typing import Dict, List, NamedTuple, Set, Tuple
from game import Game, TEAMS
import requests
GAMES_CSV = 'games.csv'
AVAILABILITIES_CSV = 'availabilities.csv'
RATINGS_CSV = 'ratings.csv'
BASE_URL = 'https://api.overwatchleague.com/'
Availabilities = Dict[Tuple[str, int], Dict[str, Set[str]]]
class CSVGame(NamedTuple):
"""Describe a single game in a CSV file."""
match_id: int
stage: str
start_time: datetime
team1: str
team2: str
match_format: str
game_id: int = None
game_number: int = None
map_name: str = None
score1: int = None
score2: int = None
roster1: str = None
roster2: str = None
full_roster1: str = None
full_roster2: str = None
def join_names(names: List[str]) -> str:
return '|'.join(sorted(names))
def split_names(names_str: str) -> List[str]:
return set(names_str.split('|'))
def fetch_games() -> List[CSVGame]:
url = BASE_URL + 'match'
params = {'size': 1000}
result = requests.get(url, params).json()
games = []
for raw_match in result['content']:
games += parse_match(raw_match)
games.sort(key=lambda game: game.start_time)
return fill_availabilities(games)
def parse_match(raw_match) -> List[CSVGame]:
if None in raw_match['competitors'] or 'abbreviatedName' not in raw_match['competitors'][0]:
return [] # The competitors have not been decided, don't parse it.
match_id = raw_match['id']
stage = raw_match['bracket']['stage']['tournament']['title']
start_time = datetime.fromtimestamp(raw_match['startDate'] / 1000)
team1_id = raw_match['competitors'][0]['id']
team2_id = raw_match['competitors'][1]['id']
team1_abbr = raw_match['competitors'][0]['abbreviatedName']
team2_abbr = raw_match['competitors'][1]['abbreviatedName']
# Fix an API bug.
if stage == 'Split 4':
stage = 'Stage 4'
prefix = 'Overwatch League '
if stage.startswith(prefix):
stage = stage[len(prefix):]
best_of = raw_match.get('bestOf')
if best_of is None:
match_format = 'regular'
else:
match_format = f'best-of-{best_of}'
base_game = CSVGame(match_id=match_id, stage=stage, start_time=start_time,
team1=team1_abbr, team2=team2_abbr,
match_format=match_format)
if raw_match['state'] != 'CONCLUDED':
return [base_game] # This a unfinished match.
games = []
for raw_game in raw_match['games']:
game = parse_game(raw_game, base_game, team1_id, team2_id)
if game is not None:
games.append(game)
return games
def parse_game(raw_game, base_game: CSVGame, team1_id: int,
team2_id: int) -> CSVGame:
if raw_game['state'] != 'CONCLUDED':
return None # This is an unfinished match, don't parse it.
game_id = raw_game['id']
game_number = raw_game['number']
if 'map' in raw_game['attributes']:
map_name = raw_game['attributes']['map']
else:
map_guid = raw_game['attributes']['mapGuid']
if map_guid == '0x08000000000002AF':
map_name = 'hollywood'
elif map_guid == '0x0800000000000756':
map_name = 'junkertown'
else:
print('Failed to get map for', (base_game, game_number, map_guid))
exit()
score = raw_game['points']
roster1 = []
roster2 = []
for raw_player in raw_game['players']:
team_id = raw_player['team']['id']
name = raw_player['player']['name']
if team_id == team1_id:
roster1.append(name)
elif team_id == team2_id:
roster2.append(name)
else:
print(f'{game_id}: Invalid team id ({name}, {team_id}), skipping.')
continue
if len(roster1) != 6 or len(roster2) != 6:
print(f'{game_id}: Invalid player numbers ({roster1}, {roster2}).')
if len(roster1) < 6 or len(roster2) < 6:
return None
roster1 = join_names(roster1[:6])
roster2 = join_names(roster2[:6])
game = base_game._replace(game_id=game_id, game_number=game_number,
map_name=map_name,
score1=score[0], score2=score[1],
roster1=roster1, roster2=roster2)
return game
def save_games(games: List[CSVGame], csv_filename: str = GAMES_CSV) -> None:
with open(csv_filename, 'w', newline='') as csv_file:
writer = csv_writer(csv_file)
writer.writerow(CSVGame._fields) # Write headers.
writer.writerows(games)
def load_games(csv_filename: str = GAMES_CSV) -> Tuple[List[Game], List[Game]]:
"""Load past & future games from a csv file."""
past_games = []
future_games = []
with open(csv_filename, newline='') as csv_file:
reader = csv_reader(csv_file)
next(reader, None) # Skip the header line.
for csv_game in map(CSVGame._make, reader):
match_id = int(csv_game.match_id)
stage = csv_game.stage
start_time = datetime.strptime(csv_game.start_time,
'%Y-%m-%d %H:%M:%S')
teams = (csv_game.team1, csv_game.team2)
match_format = csv_game.match_format
full_rosters = (split_names(csv_game.full_roster1),
split_names(csv_game.full_roster2))
if csv_game.game_id:
game_id = int(csv_game.game_id)
game_number = int(csv_game.game_number)
map_name = csv_game.map_name
score = (int(csv_game.score1), int(csv_game.score2))
rosters = (split_names(csv_game.roster1),
split_names(csv_game.roster2))
game = Game(match_id=match_id, stage=stage,
start_time=start_time, teams=teams,
match_format=match_format, game_id=game_id,
game_number=game_number, map_name=map_name,
score=score, rosters=rosters,
full_rosters=full_rosters)
past_games.append(game)
else:
game = Game(match_id=match_id, stage=stage,
start_time=start_time, teams=teams,
match_format=match_format,
full_rosters=full_rosters)
future_games.append(game)
return past_games, future_games
def load_availabilities(
csv_filename: str = AVAILABILITIES_CSV) -> Availabilities:
availabilities = {}
with open(csv_filename, newline='') as csv_file:
for row in DictReader(csv_file):
stage = row.pop('stage')
match_number = int(row.pop('match_number'))
team_members = defaultdict(set)
for name, team in row.items():
if team not in TEAMS:
continue
team_members[team].add(name)
availabilities[(stage, match_number)] = team_members
return availabilities
def fill_availabilities(games: List[CSVGame]) -> List[CSVGame]:
availabilities = load_availabilities()
match_ids = defaultdict(set)
filled_games = []
for game in games:
key1 = game.stage, game.team1
key2 = game.stage, game.team2
match_ids[key1].add(game.match_id)
match_ids[key2].add(game.match_id)
match_key1 = (game.stage, len(match_ids[key1]))
match_key2 = (game.stage, len(match_ids[key2]))
player_set1 = set(availabilities[match_key1][game.team1])
player_set2 = set(availabilities[match_key2][game.team2])
if game.roster1:
for player in split_names(game.roster1):
if player not in player_set1:
print(f'Unknown player {player} in {match_key1}, {game.team1}.')
if game.roster2:
for player in split_names(game.roster2):
if player not in player_set2:
print(f'Unknown player {player} in {match_key2}, {game.team2}.')
full_roster1 = join_names(player_set1)
full_roster2 = join_names(player_set2)
filled_games.append(game._replace(full_roster1=full_roster1,
full_roster2=full_roster2))
return filled_games
def save_ratings_history(history, mu, sigma, csv_filename: str = RATINGS_CSV):
# Collect all unique names.
names = set(name for ratings in history.values()
for name in ratings.keys())
row = {}
for name in names:
row[f'{name}.mu'] = round(mu)
row[f'{name}.sigma'] = round(sigma)
fieldnames = ['stage', 'match_number'] + sorted(row.keys())
with open(csv_filename, 'w', newline='') as csv_file:
writer = DictWriter(csv_file, fieldnames=fieldnames)
writer.writeheader()
for (stage, match_number), ratings in history.items():
row['stage'] = stage
row['match_number'] = match_number
for name, rating in ratings.items():
row[f'{name}.mu'] = round(rating.mu)
row[f'{name}.sigma'] = round(rating.sigma)
writer.writerow(row)
if __name__ == '__main__':
games = fetch_games()
save_games(games)