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42 lines
1.0 KiB
42 lines
1.0 KiB
import Cache from './Cache.ts'
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import { Collection } from '../collection/Collection.ts'
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/**
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* Base interface for an item stored in a memory cache.
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*/
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export interface InMemCacheItem {
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key: string,
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item: string,
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}
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/**
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* A cache implementation stored in memory.
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* @extends Cache
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*/
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export class InMemCache extends Cache {
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/**
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* The stored cache items.
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* @type Collection<InMemCacheItem>
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*/
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protected items: Collection<InMemCacheItem> = new Collection<InMemCacheItem>()
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public async fetch(key: string) {
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const item = this.items.firstWhere('key', '=', key)
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if ( item ) return item.item
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}
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public async put(key: string, item: string) {
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const existing = this.items.firstWhere('key', '=', key)
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if ( existing ) existing.item = item
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else this.items.push({ key, item })
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}
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public async has(key: string) {
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return this.items.where('key', '=', key).length > 0
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}
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public async drop(key: string) {
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this.items = this.items.whereNot('key', '=', key)
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}
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}
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