31 lines
1.0 KiB
TypeScript
31 lines
1.0 KiB
TypeScript
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import { remove } from 'fs-extra/esm'
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import { logger } from '../../../helpers/logger.js'
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import memoizee from 'memoizee'
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type GetFilePathResult = { isOwned: boolean, path: string, downloadName?: string } | undefined
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export abstract class AbstractSimpleFileCache <T> {
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getFilePath: (params: T) => Promise<GetFilePathResult>
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abstract getFilePathImpl (params: T): Promise<GetFilePathResult>
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// Load and save the remote file, then return the local path from filesystem
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protected abstract loadRemoteFile (key: string): Promise<GetFilePathResult>
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init (max: number, maxAge: number) {
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this.getFilePath = memoizee(this.getFilePathImpl, {
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maxAge,
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max,
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promise: true,
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dispose: (result?: GetFilePathResult) => {
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if (result && result.isOwned !== true) {
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remove(result.path)
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.then(() => logger.debug('%s removed from %s', result.path, this.constructor.name))
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.catch(err => logger.error('Cannot remove %s from cache %s.', result.path, this.constructor.name, { err }))
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}
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}
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})
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}
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}
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