Lars Noack
49145a7d93
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159 lines
4.8 KiB
Python
159 lines
4.8 KiB
Python
import re
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from pathlib import Path
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from typing import Any, Callable, Dict, Generator, List, Optional
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from ..utils.config import main_settings
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from ..utils.exception import MKComposeException
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from ..utils.string_processing import unify
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class Option:
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"""
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This could represent a data object, a string or a page.
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"""
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def __init__(
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self,
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value: Any,
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text: Optional[str] = None,
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keys: List[Any] = None,
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hidden: bool = False,
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parse_key: Callable[[Any], Any] = lambda x: x,
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):
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self._parse_key: Callable[[Any], Any] = parse_key
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self.value = value
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self.text = text or str(value)
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self.hidden = hidden
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self._raw_keys = set(keys or [])
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self._raw_keys.add(self.text)
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self.keys = set(self.parse_key(key) for key in self._raw_keys)
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def register_key(self, key: Any):
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self._raw_keys.add(key)
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self.keys.add(self._parse_key(key))
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@property
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def parse_key(self) -> Callable[[Any], Any]:
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return self._parse_key
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@parse_key.setter
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def parse_key(self, value: Callable[[Any], Any]):
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self._parse_key = value
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self.keys = set(self._parse_key(key) for key in self._raw_keys)
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def __str__(self):
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return self.text
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class Select:
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def __init__(
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self,
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options: Generator[Option, None, None] = None,
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option_factory: Callable[[Any], Option] = None,
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raw_options: List[Any] = None,
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parse_option_key: Callable[[Any], Any] = lambda x: x,
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ask_for_creating_option: Callable[[Option], bool] = lambda x: True,
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sort: bool = False,
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**kwargs
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):
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self._parse_option_key: Callable[[Any], Any] = parse_option_key
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self._ask_for_creating_option: Callable[[Option], bool] = ask_for_creating_option
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self._key_to_option: Dict[Any, Option] = dict()
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self._options: List[Option] = []
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options = options or []
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self.option_factory: Optional[Callable[[Any], Option]] = option_factory
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if self.can_create_options:
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_raw_options = raw_options or []
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if sort:
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_raw_options = sorted(_raw_options)
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for raw_option in _raw_options:
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self.append(self.option_factory(raw_option))
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elif raw_options is not None:
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raise MKComposeException("Cannot create options without a factory.")
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self.extend(options)
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@property
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def can_create_options(self) -> bool:
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return self.option_factory is not None
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def append(self, option: Option):
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option.parse_key = self._parse_option_key
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self._options.append(option)
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for key in option.keys:
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self._key_to_option[key] = option
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def extend(self, options: List[Option]):
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for option in options:
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self.append(option)
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def __iter__(self) -> Generator[Option, None, None]:
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for option in self._options:
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if option.hidden:
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continue
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yield option
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def __contains__(self, key: Any) -> bool:
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return key in self._key_to_option
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def __getitem__(self, key: Any) -> Option:
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return self._key_to_option[key]
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def create_option(self, key: Any, **kwargs) -> Option:
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if not self.can_create_options:
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raise MKComposeException("Cannot create options without a factory.")
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option = self.option_factory(key, **kwargs)
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self.append(option)
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return option
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def choose(self, key: Any) -> Optional[Option]:
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if key not in self:
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if self.can_create_options and self._ask_for_creating_option(key):
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return self.create_option(key)
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return None
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return self[key]
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class StringSelect(Select):
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def __init__(self, **kwargs):
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self._current_index = 0
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kwargs["option_factory"] = self.next_option
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kwargs["parse_option_key"] = lambda x: unify(str(x))
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super().__init__(**kwargs)
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def next_option(self, value: Any) -> Optional[Option]:
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o = Option(value=value, keys=[self._current_index], text=f"{self._current_index:0>2}: {value}")
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self._current_index += 1
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return o
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class GenreSelect(StringSelect):
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@staticmethod
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def is_valid_genre(genre: Path) -> bool:
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"""
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gets the name of all subdirectories of shared.MUSIC_DIR,
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but filters out all directories, where the name matches with any Patern
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from shared.NOT_A_GENRE_REGEX.
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"""
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if not genre.is_dir():
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return False
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if any(re.match(regex_pattern, genre.name) for regex_pattern in main_settings["not_a_genre_regex"]):
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return False
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return True
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def __init__(self):
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super().__init__(sort=True, raw_options=(genre.name for genre in filter(self.is_valid_genre, main_settings["music_directory"].iterdir())))
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