85 lines
2.4 KiB
Python
85 lines
2.4 KiB
Python
from typing import List
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from .source import SourceAttribute
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from ...utils import string_processing
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class Collection:
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"""
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This an class for the iterables
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like tracklist or discography
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"""
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_data: List[SourceAttribute]
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_by_url: dict
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_by_attribute: dict
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def __init__(self, data: list = None, map_attributes: list = None, element_type=None) -> None:
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"""
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Attribute needs to point to
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"""
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self._by_url = dict()
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self.map_attributes = map_attributes or []
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self.element_type = element_type
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self._by_attribute = {attr: dict() for attr in map_attributes}
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self._data = data or []
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for element in self._data:
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self.map_element(element=element)
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def map_element(self, element: SourceAttribute):
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for source_url in element.source_url_map:
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self._by_url[source_url] = element
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for attr in self.map_attributes:
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value = element.__getattribute__(attr)
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if type(value) != str:
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# this also throws out all none values
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continue
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self._by_attribute[attr][string_processing.unify(value)] = element
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def get_object_with_source(self, url: str) -> any:
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"""
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Returns either None, or the object, that has a source
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matching the url.
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"""
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if url in self._by_url:
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return self._by_url[url]
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def get_object_with_attribute(self, name: str, value: str):
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if name not in self.map_attributes:
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raise ValueError(f"didn't map the attribute {name}")
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unified = string_processing.unify(value)
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if unified in self._by_attribute[name]:
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return self._by_attribute[name][unified]
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def append(self, element: SourceAttribute):
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if type(element) is not self.element_type and self.element_type is not None:
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raise TypeError(f"{type(element)} is not the set type {self.element_type}")
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self._data.append(element)
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self.map_element(element)
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def __iter__(self):
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for element in self._data:
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yield element
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def __str__(self) -> str:
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return "\n".join([f"{str(j).zfill(2)}: {i}" for j, i in enumerate(self._data)])
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def __len__(self) -> int:
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return len(self._data)
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def copy(self) -> List:
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"""
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returns a shallow copy of the data list
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"""
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return self._data.copy()
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