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# ========================================================================== #
# #
# KVMD - The main Pi-KVM daemon. #
# #
# Copyright (C) 2018-2021 Maxim Devaev <[email protected]> #
# #
# This program is free software: you can redistribute it and/or modify #
# it under the terms of the GNU 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 General Public License for more details. #
# #
# You should have received a copy of the GNU General Public License #
# along with this program. If not, see <https://www.gnu.org/licenses/>. #
# #
# ========================================================================== #
import operator
import functools
import multiprocessing.queues
import queue
from typing import Tuple
from typing import List
from typing import Dict
from typing import Hashable
from typing import TypeVar
# =====
def remap(value: int, in_min: int, in_max: int, out_min: int, out_max: int) -> int:
return (value - in_min) * (out_max - out_min) // (in_max - in_min) + out_min
# =====
def efmt(err: Exception) -> str:
return f"{type(err).__name__}: {err}"
# =====
def merge(dest: Dict, src: Dict) -> None:
for key in src:
if key in dest:
if isinstance(dest[key], dict) and isinstance(src[key], dict):
merge(dest[key], src[key])
continue
dest[key] = src[key]
def rget(dct: Dict, *keys: Hashable) -> Dict:
result = functools.reduce((lambda nxt, key: nxt.get(key, {})), keys, dct)
if not isinstance(result, dict):
raise TypeError(f"Not a dict as result: {result!r} from {dct!r} at {list(keys)}")
return result
_DictKeyT = TypeVar("_DictKeyT")
_DictValueT = TypeVar("_DictValueT")
def sorted_kvs(dct: Dict[_DictKeyT, _DictValueT]) -> List[Tuple[_DictKeyT, _DictValueT]]:
return sorted(dct.items(), key=operator.itemgetter(0))
def swapped_kvs(dct: Dict[_DictKeyT, _DictValueT]) -> Dict[_DictValueT, _DictKeyT]:
return {value: key for (key, value) in dct.items()}
# =====
def clear_queue(q: multiprocessing.queues.Queue) -> None: # pylint: disable=invalid-name
for _ in range(q.qsize()):
try:
q.get_nowait()
except queue.Empty:
break
# =====
def build_cmd(cmd: List[str], cmd_remove: List[str], cmd_append: List[str]) -> List[str]:
assert len(cmd) >= 1, cmd
return [
cmd[0], # Executable
*filter((lambda item: item not in cmd_remove), cmd[1:]),
*cmd_append,
]
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