From 25e030a7074f8e00cfbdaf85e491b9b22886991d Mon Sep 17 00:00:00 2001
From: syuilo <Syuilotan@yahoo.co.jp>
Date: Mon, 11 Sep 2023 14:55:18 +0900
Subject: enhance(frontend): improve some caches

---
 packages/frontend/src/scripts/cache.ts | 46 ++++++----------------------------
 1 file changed, 7 insertions(+), 39 deletions(-)

(limited to 'packages/frontend/src/scripts/cache.ts')

diff --git a/packages/frontend/src/scripts/cache.ts b/packages/frontend/src/scripts/cache.ts
index 0dda203ef0..12347cf4b1 100644
--- a/packages/frontend/src/scripts/cache.ts
+++ b/packages/frontend/src/scripts/cache.ts
@@ -9,9 +9,11 @@ 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']) {
+	constructor(lifetime: Cache<never>['lifetime'], fetcher: () => Promise<T>) {
 		this.lifetime = lifetime;
+		this.fetcher = fetcher;
 	}
 
 	public set(value: T): void {
@@ -35,51 +37,17 @@ export class Cache<T> {
 
 	/**
 	 * 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
-	 * optional: キャッシュが存在してもvalidatorでfalseを返すとキャッシュ無効扱いにします
 	 */
-	public async fetch(fetcher: () => Promise<T>, validator?: (cachedValue: T) => boolean): Promise<T> {
+	public async fetch(): Promise<T> {
 		const cachedValue = this.get();
 		if (cachedValue !== undefined) {
-			if (validator) {
-				if (validator(cachedValue)) {
-					// Cache HIT
-					return cachedValue;
-				}
-			} else {
-				// Cache HIT
-				return cachedValue;
-			}
+			// Cache HIT
+			return cachedValue;
 		}
 
 		// Cache MISS
-		const value = await fetcher();
+		const value = await this.fetcher();
 		this.set(value);
 		return value;
 	}
-
-	/**
-	 * 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
-	 * optional: キャッシュが存在してもvalidatorでfalseを返すとキャッシュ無効扱いにします
-	 */
-	public async fetchMaybe(fetcher: () => Promise<T | undefined>, validator?: (cachedValue: T) => boolean): Promise<T | undefined> {
-		const cachedValue = this.get();
-		if (cachedValue !== undefined) {
-			if (validator) {
-				if (validator(cachedValue)) {
-					// Cache HIT
-					return cachedValue;
-				}
-			} else {
-				// Cache HIT
-				return cachedValue;
-			}
-		}
-
-		// Cache MISS
-		const value = await fetcher();
-		if (value !== undefined) {
-			this.set(value);
-		}
-		return value;
-	}
 }
-- 
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