refactor(frontend): scripts -> utility

packages/frontend/src/scripts/cache.ts

@@ -1,53 +0,0 @@
-/*
- * SPDX-FileCopyrightText: syuilo and misskey-project
- * SPDX-License-Identifier: AGPL-3.0-only
- */
-
-import { ref } from 'vue';
-
-export class Cache<T> {
-	private cachedAt: number | null = null;
-	public value = ref<T | undefined>();
-	private lifetime: number;
-	private fetcher: () => Promise<T>;
-
-	constructor(lifetime: Cache<never>['lifetime'], fetcher: () => Promise<T>) {
-		this.lifetime = lifetime;
-		this.fetcher = fetcher;
-	}
-
-	public set(value: T): void {
-		this.cachedAt = Date.now();
-		this.value.value = value;
-	}
-
-	private get(): T | undefined {
-		if (this.cachedAt == null) return undefined;
-		if ((Date.now() - this.cachedAt) > this.lifetime) {
-			this.value.value = undefined;
-			this.cachedAt = null;
-			return undefined;
-		}
-		return this.value.value;
-	}
-
-	public delete() {
-		this.cachedAt = null;
-	}
-
-	/**
-	 * キャッシュがあればそれを返し、無ければfetcherを呼び出して結果をキャッシュ&返します
-	 */
-	public async fetch(): Promise<T> {
-		const cachedValue = this.get();
-		if (cachedValue !== undefined) {
-			// Cache HIT
-			return cachedValue;
-		}
-
-		// Cache MISS
-		const value = await this.fetcher();
-		this.set(value);
-		return value;
-	}
-}