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import abc |
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from pathlib import Path |
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from typing import Callable, Sequence, Optional, Mapping, Any |
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import orjson |
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import defusedxml.ElementTree as Xml |
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8
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from pocketutils.core.dot_dict import NestedDotDict |
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from pocketutils.core.query_utils import QueryExecutor |
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class _Source: |
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def __init__(self, *getters: Callable[[], Optional[str]], name: str = "unknown"): |
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self._getters = getters |
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self._name = name |
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def _get_txt(self) -> str: |
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for getter in self._getters: |
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txt = getter() |
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if txt is not None: |
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return txt |
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raise ValueError(f"Nothing found for {self._name} {self.__class__.__name__} source") |
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@classmethod |
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def cached_from_url( |
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cls, |
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path: Optional[Path], |
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url: Optional[str], |
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query: QueryExecutor, |
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query_args: Optional[Mapping[str, Any]] = None, |
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): |
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if path is not None and url is None and query is None: |
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return cls.from_path(path) |
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elif path is None and url is not None and query is not None: |
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return cls.from_query(url, query, query_args) |
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elif path is not None and url is not None and query is not None: |
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path = Path(path) |
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query_args = {} if query_args is None else query_args |
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def load(): |
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return path.read_text(encoding="utf8") if path.exists() else None |
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def save(): |
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data = query(url, encoding="utf8", **query_args) |
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if data is not None: |
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if not path.exists(): |
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path.write_text(data, encoding="utf8") |
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return data |
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# noinspection PyArgumentList |
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return cls(load, save, name=f"Cache({path}, {url})") |
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raise ValueError(f"Cannot create source from path {path}, url {url}, and query {query}") |
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@classmethod |
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def from_path(cls, path: Path): |
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path = Path(path) |
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def one(): |
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return path.read_text(encoding="utf8") if path.exists() else None |
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# noinspection PyArgumentList |
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return cls(one, name=f"Cache({path})") |
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@classmethod |
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def from_query( |
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cls, url: str, query: QueryExecutor, query_args: Optional[Mapping[str, Any]] = None |
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): |
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def two(): |
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return query(url, encoding="utf8", **query_args) |
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# noinspection PyArgumentList |
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return cls(two, name=f"Cache({url})") |
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74
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75
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class TextSource(_Source): |
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def get(self) -> str: |
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return self._get_txt() |
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79
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80
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class XmlSource(_Source): |
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""" """ |
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def get(self) -> Xml: |
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84
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return Xml.fromstring(self._get_txt()) |
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86
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87
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class JsonSource(_Source): |
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""" """ |
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90
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def get(self) -> NestedDotDict: |
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return NestedDotDict(orjson.loads(self._get_txt())) |
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93
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94
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__all__ = ["TextSource", "XmlSource", "JsonSource"] |
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dmyersturnbull /
mandos
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