From 38cfbdbdc2754f09dd4a6894635490df6e22d812 Mon Sep 17 00:00:00 2001
From: Arthur Ydalgo <arthurc@alunos.utfpr.edu.br>
Date: Tue, 3 Jan 2023 15:04:06 -0400
Subject: [PATCH] init

---
 index.js          | 86 +++++++++++++++++++++++++++++++++++++++++++++++
 package-lock.json | 13 +++++++
 package.json      | 23 +++++++++++++
 3 files changed, 122 insertions(+)
 create mode 100644 index.js
 create mode 100644 package-lock.json
 create mode 100644 package.json

diff --git a/index.js b/index.js
new file mode 100644
index 0000000..8b0a837
--- /dev/null
+++ b/index.js
@@ -0,0 +1,86 @@
+class CacheStore {
+    constructor(cacheKeyPrefix = null) {
+        this.cacheKeyPrefix = cacheKeyPrefix;
+    }
+    isNumber(value) {
+        return !isNaN(parseFloat(value)) && !isNaN(value - 0)
+    }
+    isDate(value) {
+        return value instanceof Date && !isNaN(value.valueOf())
+    }
+    put(key, value, ttl = null) {
+        let createdAt = new Date();
+        let expiresAt = null;
+
+        if (this.isNumber(ttl)) {
+            let date = new Date();
+            date.setSeconds(date.getSeconds() + ttl);
+            expiresAt = date.toISOString();
+        }
+
+        if (this.isDate(ttl)) {
+            expiresAt = ttl.toISOString();
+        }
+
+        let cachedData = {
+            value, createdAt, expiresAt
+        };
+
+        if (this.cacheKeyPrefix) {
+            key = this.cacheKeyPrefix + key;
+        }
+
+        localStorage.setItem(key, JSON.stringify(cachedData));
+
+        return value;
+    }
+    delete(key) {
+        if (this.cacheKeyPrefix) {
+            key = this.cacheKeyPrefix + key;
+        }
+
+        return localStorage.removeItem(key);
+    }
+    remember(key, ttl, callback) {
+        if (this.cacheKeyPrefix) {
+            key = this.cacheKeyPrefix + key;
+        }
+
+        let localStorageItem = localStorage.getItem(key);
+
+        let cachedData = localStorageItem ? JSON.parse(localStorageItem) : undefined;
+
+        // If cached data exists and doesn't expire, or if cached data expires, but still hasn't
+        if (cachedData && (!cachedData.expiresAt || (cachedData.expiresAt && cachedData.expiresAt > new Date().toISOString()))) {
+            return cachedData.value;
+        }
+
+        this.put(key, undefined, ttl);
+
+        let value = callback();
+
+        return this.put(key, value, ttl);
+    }
+    rememberForever(key, callback) {
+        return this.remember(key, null, callback);
+    }
+    get(key, defaultValue = undefined) {
+        if (this.cacheKeyPrefix) {
+            key = this.cacheKeyPrefix + key;
+        }
+
+        let localStorageItem = localStorage.getItem(key);
+
+        if (!localStorageItem) {
+            return defaultValue;
+        }
+
+        let cachedData = JSON.parse(localStorageItem);
+
+        if (cachedData.expiresAt && cachedData.expiresAt < new Date().toISOString()) {
+            return defaultValue;
+        }
+
+        return cachedData.value;
+    }
+}
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..1373fd5
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,13 @@
+{
+  "name": "time-based-cache",
+  "version": "1.0.0",
+  "lockfileVersion": 2,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "time-based-cache",
+      "version": "1.0.0",
+      "license": "ISC"
+    }
+  }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..3abe5cb
--- /dev/null
+++ b/package.json
@@ -0,0 +1,23 @@
+{
+  "name": "time-based-cache",
+  "version": "1.0.1",
+  "description": "A Laravel-like Cache Store for Javascript",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/ArthurYdalgo/time-based-cache-js.git"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "files": [
+    "index.js"
+  ],
+  "main": "index.js",
+  "bugs": {
+    "url": "https://github.com/ArthurYdalgo/time-based-cache-js/issues"
+  },
+  "homepage": "https://github.com/ArthurYdalgo/time-based-cache-js#readme"
+}