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59 lines
2.4 KiB
Python
59 lines
2.4 KiB
Python
# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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from copy import deepcopy
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from flask import Flask
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class FeatureFlagManager:
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def __init__(self) -> None:
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super().__init__()
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self._get_feature_flags_func = None
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self._is_feature_enabled_func = None
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self._feature_flags: dict[str, bool] = {}
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def init_app(self, app: Flask) -> None:
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self._get_feature_flags_func = app.config["GET_FEATURE_FLAGS_FUNC"]
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self._is_feature_enabled_func = app.config["IS_FEATURE_ENABLED_FUNC"]
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self._feature_flags = app.config["DEFAULT_FEATURE_FLAGS"]
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self._feature_flags.update(app.config["FEATURE_FLAGS"])
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def get_feature_flags(self) -> dict[str, bool]:
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if self._get_feature_flags_func:
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return self._get_feature_flags_func(deepcopy(self._feature_flags))
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if callable(self._is_feature_enabled_func):
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return dict( # noqa: C417
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map(
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lambda kv: (kv[0], self._is_feature_enabled_func(kv[0], kv[1])),
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self._feature_flags.items(),
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)
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)
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return self._feature_flags
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def is_feature_enabled(self, feature: str) -> bool:
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"""Utility function for checking whether a feature is turned on"""
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if self._is_feature_enabled_func:
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return (
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self._is_feature_enabled_func(feature, self._feature_flags[feature])
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if feature in self._feature_flags
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else False
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)
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feature_flags = self.get_feature_flags()
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if feature_flags and feature in feature_flags:
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return feature_flags[feature]
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return False
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