Lars Noack
d4fe99ffc7
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303 lines
9.1 KiB
Python
303 lines
9.1 KiB
Python
from __future__ import annotations
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import re
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from collections import defaultdict
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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 ..objects import OuterProxy as DataObject
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from ..utils import BColors
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from ..utils.config import main_settings
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from ..utils.enums import SourceType
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from ..utils.exception import MKComposeException
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from ..utils.shared import ALPHABET
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from ..utils.string_processing import unify
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class HumanIO:
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@staticmethod
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def ask_to_create(option: Option) -> bool:
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return True
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@staticmethod
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def not_found(key: Any) -> None:
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return None
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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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index: int = None,
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):
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self._parse_key: Callable[[Any], Any] = parse_key
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self._index = index
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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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try:
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self._raw_keys.add(self.value)
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except TypeError:
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pass
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self._raw_keys.add(str(self.value))
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self._raw_keys.add(self._index)
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self.keys = set(self.parse_key(key) for key in self._raw_keys)
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@property
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def text(self) -> str:
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return self._text.replace("{index}", str(self.index))
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@text.setter
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def text(self, value: str):
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self._text = value
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@property
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def index(self) -> int:
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return self._index
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@index.setter
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def index(self, value: int):
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p = self._parse_key(self._index)
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if p in self.keys:
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self.keys.remove(p)
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self._index = value
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self.keys.add(p)
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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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human_io: HumanIO = HumanIO,
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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.human_io: HumanIO = human_io
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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 _remap(self):
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self._key_to_option = dict()
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for option in self._options:
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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 self._parse_option_key(key) in self._key_to_option
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def __getitem__(self, key: Any) -> Option:
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r = self._key_to_option[self._parse_option_key(key)]
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if callable(r):
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r = r()
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if callable(r.value):
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r.value = r.value()
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return r
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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:
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c = self.create_option(key)
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if self.human_io.ask_to_create(c):
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return c
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self.human_io.not_found(key)
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return None
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return self[key]
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def pprint(self) -> str:
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return "\n".join(str(option) for option in self)
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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"{BColors.BOLD.value}{self._current_index: >2}{BColors.ENDC.value}: {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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class SourceTypeToOption(dict):
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def __init__(self, callback):
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super().__init__()
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self.callback = callback
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def __missing__(self, key):
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self[key] = self.callback(key)
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return self[key]
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class DataObjectSelect(Select):
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def __init__(self, data_objects: Generator[DataObject]):
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self._source_type_to_data_objects: Dict[SourceType, List[Option]] = defaultdict(list)
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self._source_type_to_option: Dict[SourceType, Option] = SourceTypeToOption(self.option_from_source_type)
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self._data_object_index: int = 0
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self._source_type_index: int = 0
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super().__init__(
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parse_option_key=lambda x: unify(str(x)),
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)
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self.extend(data_objects)
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def option_from_data_object(self, data_object: DataObject) -> Option:
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index = self._data_object_index
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self._data_object_index += 1
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return Option(
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value=data_object,
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keys=[index, data_object.option_string, data_object.title_string],
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text=f"{BColors.BOLD.value}{{index}}{BColors.ENDC.value}: {data_object.option_string}",
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index=index,
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)
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def option_from_source_type(self, source_type: SourceType) -> Option:
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index = ALPHABET[self._source_type_index % len(ALPHABET)]
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self._source_type_index += 1
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o = Option(
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value=lambda: DataObjectSelect(self._source_type_to_data_objects[source_type]),
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keys=[index, source_type],
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text=f"{BColors.HEADER.value}({index}) --------------------------------{source_type.name:{'-'}<{21}}--------------------{BColors.ENDC.value}",
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)
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super().append(o)
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return o
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def append(self, option: Union[Option, DataObject]):
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if isinstance(option, DataObject):
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data_object = option
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option = self.option_from_data_object(data_object)
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else:
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data_object = option.value
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for source_type in data_object.source_collection.source_types(only_with_page=True):
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self._source_type_to_data_objects[source_type].append(option)
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super().append(option)
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def __iter__(self):
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source_types = list(sorted(self._source_type_to_data_objects.keys(), key=lambda x: x.name))
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single_source = len(source_types) > 1
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j = 0
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for st in source_types:
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if single_source:
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yield self._source_type_to_option[st]
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limit = min(15, len(self._source_type_to_data_objects[st])) if single_source else len(self._source_type_to_data_objects[st])
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for i in range(limit):
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o = self._source_type_to_data_objects[st][i]
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o.index = j
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yield o
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j += 1
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self._remap() |