fix(config): add persistance mode

manucorporat · manucorporat · commit db0049ff7396 · 2018-08-12T01:18:59.000+02:00
fixes #15102
diff --git a/core/src/global/config.ts b/core/src/global/config.ts
@@ -6,6 +6,7 @@ export interface IonicConfig {
    * Possible values are: `"ios"` or `"md"`.
    */
   mode?: Mode;
+  _persist?: boolean;
 
   isDevice?: boolean;
   statusbarPadding?: boolean;
diff --git a/core/src/global/ionic-global.ts b/core/src/global/ionic-global.ts
@@ -1,6 +1,6 @@
 import 'ionicons';
 
-import { configFromURL } from '../utils/config';
+import { configFromSession, configFromURL, saveConfig } from '../utils/config';
 import { isIOS } from '../utils/platform';
 
 import { Config } from './config';
@@ -16,10 +16,15 @@ Object.defineProperty(Ionic, 'queue', {
 
 // create the Ionic.config from raw config object (if it exists)
 // and convert Ionic.config into a ConfigApi that has a get() fn
-const config = Ionic['config'] = Context['config'] = new Config({
+const configObj = {
   ...Ionic['config'],
+  ...configFromSession(),
   ...configFromURL()
-});
+};
+const config = Ionic['config'] = Context['config'] = new Config(configObj);
+if (config.getBoolean('_persist', false)) {
+  saveConfig(configObj);
+}
 
 // first see if the mode was set as an attribute on <html>
 // which could have been set by the user, or by prerendering
diff --git a/core/src/utils/config.ts b/core/src/utils/config.ts
@@ -16,6 +16,16 @@ export function setupConfig(config: IonicConfig) {
 }
 
 const IONIC_PREFIX = 'ionic:';
+const IONIC_SESSION_KEY = 'ionic-persist-config';
+
+export function configFromSession(): any {
+  const configStr = window.sessionStorage.getItem(IONIC_SESSION_KEY);
+  return configStr ? JSON.parse(configStr) : {};
+}
+
+export function saveConfig(config: any) {
+  window.sessionStorage.setItem(IONIC_SESSION_KEY, JSON.stringify(config));
+}
 
 export function configFromURL() {
   const config: any = {};
