Cache settings in local storage

js/settingsCache.js

@@ -0,0 +1,46 @@
+'use strict';
+
+const Store = require('electron-store');
+const store = new Store();
+const FC = require('./fc');
+
+var settingsCache = (function() {
+
+    let publicScope = {};
+    let privateScope = {};
+
+    const SETTINGS_KEY = 'settings';
+
+    privateScope.getSetingKey = function(settingName) {
+        return FC.CONFIG.target + '_' + FC.CONFIG.flightControllerVersion + '_' + settingName;
+    }
+
+    publicScope.flush = function() {
+        store.delete(SETTINGS_KEY);
+    };
+
+    publicScope.get = function(settingName) {
+        let settings = store.get(SETTINGS_KEY, null);
+
+        if (settings === null) {
+            return undefined;
+        }
+        let setting = settings[privateScope.getSetingKey(settingName)];
+        return setting;
+    };
+
+    publicScope.set = function(settingName, value) {
+        let settings = store.get(SETTINGS_KEY, null);
+
+        if (settings === null) {
+            settings = {};
+        }
+
+        settings[privateScope.getSetingKey(settingName)] = value;
+        store.set(SETTINGS_KEY, settings);
+    };
+
+    return publicScope;
+}());
+
+module.exports = settingsCache;