From eb781109e1fefabb453f6ea2ee5aa71cc9e5546e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=91=A8=E7=82=BD=E9=94=AE?= <397201698@qq.com>
Date: Thu, 18 Feb 2021 14:48:18 +0800
Subject: [PATCH] Create cache.ts

---
 cache.ts | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 cache.ts

diff --git a/cache.ts b/cache.ts
new file mode 100644
index 0000000..1791f48
--- /dev/null
+++ b/cache.ts
@@ -0,0 +1,62 @@
+interface CacheDetail {
+  value: any;
+  expiresTimeStamp: number;
+}
+
+interface CacheMap {
+  [cacheKey: string]: CacheDetail;
+}
+
+/**
+ * 默认过期时间
+ */
+export const DEFAULT_EXPIRES = 5 * 60 * 1000;
+
+let data: CacheMap = {};
+
+export default class {
+  /**
+   * 插入指定名称数据
+   * @param {string} name
+   * @param {T} cache
+   * @param {number} expires 有效时间（毫秒时间戳）
+   */
+  static set<T = any>(name: string, cache: T, expires: number = DEFAULT_EXPIRES) {
+    data[name] = {
+      value: cache,
+      expiresTimeStamp: Date.now() + expires,
+    };
+    return this;
+  }
+
+  static get<T = any>(name: string): T | null {
+    const detail = data[name];
+    if (!detail) return null;
+
+    try {
+      if (detail.expiresTimeStamp && detail.expiresTimeStamp > Date.now()) {
+        return detail.value || null;
+      }
+    } catch (err) {}
+    this.clear(name);
+    return null;
+  }
+
+  /**
+   * 获取指定名称数据
+   * @param {string} name
+   */
+  static clear(name: string) {
+    delete data[name];
+    return this;
+  }
+
+  /**
+   * 清除所有数据
+   */
+  static clearAll() {
+    data = {};
+
+    return this;
+  }
+}