piker/piker/watchlists/__init__.py

# piker: trading gear for hackers
# Copyright (C) 2018-present  Tyler Goodlet (in stewardship of piker0)

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.

# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

import os
import json
from collections import defaultdict

from ..log import get_logger

log = get_logger(__name__)

_builtins = {
    'indexes': ['SPY', 'DAX', 'QQQ', 'DIA'],
}


def write_to_file(watchlist, path):
    for key in watchlist:
        watchlist[key] = sorted(list(set(watchlist[key])))
    with open(path, 'w') as f:
        json.dump(watchlist, f, sort_keys=True, indent=4)


def make_config_dir(dir_path):
    if not os.path.isdir(dir_path):
        log.debug(f"Creating config dir {dir_path}")
        os.makedirs(dir_path)


def ensure_watchlists(file_path):
    mode = 'r' if os.path.isfile(file_path) else 'w'
    with open(file_path, mode) as f:
        return json.load(f) if not os.stat(file_path).st_size == 0 else {}


def add_ticker(name, ticker_name, watchlist):
    watchlist.setdefault(name, []).append(str(ticker_name).upper())
    return watchlist


def remove_ticker(name, ticker_name, watchlist):
    watchlist[name].remove(str(ticker_name).upper())
    if watchlist[name] == []:
        del watchlist[name]
    return watchlist


def delete_group(name, watchlist):
    watchlist.pop(name, None)
    return watchlist


def merge_watchlist(watchlist_to_merge, watchlist):
    merged_watchlist = defaultdict(list)
    for d in (watchlist, watchlist_to_merge):
        for key, value in d.items():
            merged_watchlist[key].extend(value)
    return merged_watchlist