141 行
4.0 KiB
Python
141 行
4.0 KiB
Python
import time
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from math import inf
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from quart import current_app
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from anonstream.chat import broadcast
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from anonstream.wrappers import try_except_log, with_timestamp
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from anonstream.helpers.user import is_visible
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from anonstream.helpers.tripcode import generate_tripcode
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from anonstream.utils.colour import color_to_colour, get_contrast, NotAColor
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from anonstream.utils.user import user_for_websocket
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CONFIG = current_app.config
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MESSAGES = current_app.messages
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USERS = current_app.users
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class BadAppearance(Exception):
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pass
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def add_notice(user, notice, verbose=False):
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notice_id = time.time_ns() // 1_000_000
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user['notices'][notice_id] = (notice, verbose)
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if len(user['notices']) > CONFIG['MAX_NOTICES']:
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user['notices'].popitem(last=False)
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return notice_id
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def pop_notice(user, notice_id):
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try:
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notice, verbose = user['notices'].pop(notice_id)
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except KeyError:
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notice, verbose = None, False
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return notice, verbose
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async def try_change_appearance(user, name, color, password,
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want_delete_tripcode, want_change_tripcode):
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errors = []
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def try_(f, *args, **kwargs):
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return try_except_log(errors, BadAppearance)(f)(*args, **kwargs)
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try_(change_name, user, name, dry_run=True)
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try_(change_color, user, color, dry_run=True)
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if want_delete_tripcode:
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pass
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elif want_change_tripcode:
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try_(change_tripcode, user, password, dry_run=True)
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if not errors:
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change_name(user, name)
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change_color(user, color)
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if want_delete_tripcode:
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delete_tripcode(user)
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elif want_change_tripcode:
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change_tripcode(user, password)
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await broadcast(
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USERS,
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payload={
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'type': 'mut-user',
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'token_hash': user['token_hash'],
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'name': user['name'],
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'color': user['color'],
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'tripcode': user['tripcode'],
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},
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)
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return errors
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def change_name(user, name, dry_run=False):
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if dry_run:
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if name is not None:
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if len(name) == 0:
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raise BadAppearance('Name was empty')
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if len(name) > 24:
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raise BadAppearance('Name exceeded 24 chars')
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else:
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user['name'] = name
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def change_color(user, color, dry_run=False):
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if dry_run:
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try:
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colour = color_to_colour(color)
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except NotAColor:
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raise BadAppearance('Invalid CSS color')
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contrast = get_contrast(
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CONFIG['CHAT_BACKGROUND_COLOUR'],
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colour,
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)
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min_contrast = CONFIG['CHAT_NAME_MIN_CONTRAST']
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if contrast < min_contrast:
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raise BadAppearance(
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'Colour had insufficient contrast:',
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(f'{contrast:.2f}', f'/{min_contrast}'),
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)
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else:
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user['color'] = color
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def change_tripcode(user, password, dry_run=False):
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if dry_run:
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if len(password) > 1024:
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raise BadAppearance('Password exceeded 1024 chars')
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else:
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user['tripcode'] = generate_tripcode(password)
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def delete_tripcode(user):
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user['tripcode'] = None
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def see(user):
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user['seen']['last'] = int(time.time())
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@with_timestamp
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def users_for_websocket(timestamp):
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visible_users = filter(
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lambda user: is_visible(timestamp, MESSAGES, user),
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USERS,
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)
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return {
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user['token_hash']: user_for_websocket(user)
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for user in visible_users
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}
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last_checkup = -inf
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def sunset(messages, users_by_token):
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global last_checkup
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timestamp = int(time.time())
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if timestamp - last_checkup < CONFIG['CHECKUP_PERIOD_USER']:
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return []
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to_delete = []
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for token in users_by_token:
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user = users_by_token[token]
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if not is_visible(timestamp, messages, user):
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to_delete.append(token)
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for index, token in enumerate(to_delete):
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to_delete[index] = users_by_token.pop(token)['token_hash']
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last_checkup = timestamp
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return to_delete
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