40 lines
1.7 KiB
TypeScript
40 lines
1.7 KiB
TypeScript
import { AbstractStorageService, ObservableStorageService } from "../abstractions/storage.service";
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// eslint-disable-next-line import/no-restricted-paths
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import { ClientLocations, StorageLocation } from "../state/state-definition";
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export type PossibleLocation = StorageLocation | ClientLocations[keyof ClientLocations];
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/**
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* A provider for getting client specific computed storage locations and services.
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*/
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export class StorageServiceProvider {
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constructor(
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protected readonly diskStorageService: AbstractStorageService & ObservableStorageService,
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protected readonly memoryStorageService: AbstractStorageService & ObservableStorageService,
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) {}
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/**
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* Computes the location and corresponding service for a given client.
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*
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* **NOTE** The default implementation does not respect client overrides and if clients
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* have special overrides they are responsible for implementing this service.
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* @param defaultLocation The default location to use if no client specific override is preferred.
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* @param overrides Client specific overrides
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* @returns The computed storage location and corresponding storage service to use to get/store state.
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* @throws If there is no configured storage service for the given inputs.
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*/
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get(
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defaultLocation: PossibleLocation,
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overrides: Partial<ClientLocations>,
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): [location: PossibleLocation, service: AbstractStorageService & ObservableStorageService] {
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switch (defaultLocation) {
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case "disk":
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return [defaultLocation, this.diskStorageService];
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case "memory":
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return [defaultLocation, this.memoryStorageService];
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default:
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throw new Error(`Unexpected location: ${defaultLocation}`);
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}
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}
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}
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