49 lines
1.6 KiB
TypeScript
49 lines
1.6 KiB
TypeScript
/*
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* Copyright (C) Contributors to the Suwayomi project
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/.
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*/
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import type { MetadataHolderType } from '@/features/metadata/Metadata.types.ts';
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export class MetadataValueCache {
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private static convertedValueByKey = new Map<string, unknown>();
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private static rawValueByKey = new Map<string, string | undefined>();
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private static getCacheKey(type: MetadataHolderType, holderId: string | number | undefined, key: string): string {
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return `${type}::${holderId ?? ''}::${key}`;
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}
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static getCachedValue<T>(
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type: MetadataHolderType,
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holderId: string | number | undefined,
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key: string,
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): T | undefined {
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return this.convertedValueByKey.get(this.getCacheKey(type, holderId, key)) as T | undefined;
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}
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static getStableValue<T>(
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type: MetadataHolderType,
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holderId: string | number | undefined,
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key: string,
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rawValue: string | undefined,
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newValue: T,
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): T {
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const cacheKey = this.getCacheKey(type, holderId, key);
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const cachedRawValue = this.rawValueByKey.get(cacheKey);
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const cachedConvertedValue = this.getCachedValue<T>(type, holderId, key);
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if (cachedRawValue !== undefined && rawValue === cachedRawValue) {
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return cachedConvertedValue as T;
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}
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this.rawValueByKey.set(cacheKey, rawValue);
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this.convertedValueByKey.set(cacheKey, newValue);
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return newValue;
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}
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}
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