65 lines
2.4 KiB
Python
65 lines
2.4 KiB
Python
#
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# Copyright (c) 2023 Airbyte, Inc., all rights reserved.
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#
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from dataclasses import InitVar, dataclass
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from typing import Any, Mapping, Optional, Union
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from airbyte_cdk.sources.declarative.interpolation.jinja import JinjaInterpolation
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from airbyte_cdk.sources.types import Config
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@dataclass
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class InterpolatedString:
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"""
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Wrapper around a raw string to be interpolated with the Jinja2 templating engine
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Attributes:
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string (str): The string to evalute
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default (Optional[str]): The default value to return if the evaluation returns an empty string
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parameters (Mapping[str, Any]): Additional runtime parameters to be used for string interpolation
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"""
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string: str
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parameters: InitVar[Mapping[str, Any]]
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default: Optional[str] = None
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def __post_init__(self, parameters: Mapping[str, Any]) -> None:
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self.default = self.default or self.string
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self._interpolation = JinjaInterpolation()
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self._parameters = parameters
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def eval(self, config: Config, **kwargs: Any) -> Any:
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"""
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Interpolates the input string using the config and other optional arguments passed as parameter.
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:param config: The user-provided configuration as specified by the source's spec
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:param kwargs: Optional parameters used for interpolation
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:return: The interpolated string
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"""
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return self._interpolation.eval(self.string, config, self.default, parameters=self._parameters, **kwargs)
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def __eq__(self, other: Any) -> bool:
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if not isinstance(other, InterpolatedString):
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return False
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return self.string == other.string and self.default == other.default
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@classmethod
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def create(
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cls,
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string_or_interpolated: Union["InterpolatedString", str],
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*,
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parameters: Mapping[str, Any],
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) -> "InterpolatedString":
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"""
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Helper function to obtain an InterpolatedString from either a raw string or an InterpolatedString.
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:param string_or_interpolated: either a raw string or an InterpolatedString.
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:param parameters: parameters propagated from parent component
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:return: InterpolatedString representing the input string.
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"""
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if isinstance(string_or_interpolated, str):
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return InterpolatedString(string=string_or_interpolated, parameters=parameters)
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else:
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return string_or_interpolated
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