Re-Wrote settings

apps/berlinc/settings.js

@@ -1,19 +1,35 @@
 (function(back) {
-    let settings = require('Storage').readJSON('berlin-clock.json',1)||{};
-    function save(key, value) {
-      settings[key] = value;
-      require('Storage').write('berlin-clock.json',settings);
+  const SETTINGS_FILE = 'berlin-clock.json'
+
+  // initialize structure
+  let s = {
+    'showdate' : false
+  }
+
+  const storage = require('Storage')
+  const savedsettings = storage.readJSON(SETTINGS_FILE,1) || {}
+  // read values from storage (if any)
+  for (const key in savedsettings) {
+    s[key]=savedsettings[key]
+  }
+
+  function save (key) {
+    return function(value) {
+      s[key]=value;
+      storage.write(SETTINGS_FILE,s);
     }
-    const appMenu = {
-      '': {'title': 'Berlin Clock Settings'},
-      '< Back': back
-      /*,
-      'Show Date': {
-        value: settings.show_date||false,
-        format: v => v?'On':'Off',
-        onchange: v => {save('showdate', v)}
-      }   
-      */
-    };
-    E.showMenu(appMenu)
-  })
+  }
+
+  const booleanFormat = b => ( b ? 'on':'off' )
+
+  const menu =  {
+    '' : { 'title' : 'Berlin Clock Settings'} ,
+    '< Back' : back,
+    'Show Date' : {
+      value : s.showdate,
+      format: booleanFormat,
+      onChange: save('showdat'),
+    },
+  }
+  E.showMenu(menu)
+})