Merge pull request #2 from bharatpe/storage-util

Storage Utils added

src/StorageUtils.js

@@ -0,0 +1,81 @@
+/**
+ * @name StorageMap object used for when Local Storage quota exceeded
+ */
+let StorageMap = {};
+
+/**
+ * @function strToJson
+ * @param {string} str 
+ * @description string to JSON object conversation
+ */
+const strToJson = (str) => {
+    try {
+        return JSON.parse(str);
+    } catch (e) {
+        return str;
+    }
+}
+
+/**
+ * @function _get
+ * @param {string} key 
+ * @description get value from localstorage by key name
+ */
+const _get = (key) => {
+    let value = StorageMap[key] || window.localStorage.getItem(key);
+    value = strToJson(value);
+    return value;
+}
+
+/**
+ * @function _set
+ * @param {string} key 
+ * @param {string} value 
+ * @description set value to localstorage
+ */
+const _set = (key, value) => {
+    if (typeof value === 'object') {
+        value = JSON.stringify(value);
+    }
+    try {
+        window.localStorage.setItem(key, value);
+    } catch (e) {
+        StorageMap[key] = value;
+    }
+}
+
+/**
+ * @function _has
+ * @param {string} key 
+ * @description check key available in localstorage
+ */
+const _has = (key) => {
+ return (StorageMap.hasOwnProperty(key) || window.localStorage.getItem(key) !== null);  
+}
+
+/**
+ * @function _remove
+ * @param {string} key 
+ * @description remove key from localstorage
+ */
+const _remove = (key) => {
+    window.localStorage.removeItem(key);
+    delete StorageMap[key];
+}
+
+/**
+ * @function _removeAll
+ * @description remove all items from localstorage
+ */
+const _removeAll = () => {
+    StorageMap = {};
+    window.localStorage.clear();
+}
+
+export default {
+    get: _get,
+    set: _set,
+    has: _has,
+    remove: _remove,
+    removeAll: _removeAll
+};