Settings library: use `appid.json`, update README.md and sanitycheck.js

README.md

@@ -377,40 +377,37 @@ that handles configuring the app.
 When the app settings are opened, this function is called with one
 argument, `back`: a callback to return to the settings menu.
 
-Usually it will save any information in `app.json` where `app` is the name
+Usually it will save any information in `myappid.json` where `myappid` is the name
 of your app - so you should change the example accordingly.
 
 Example `settings.js`
 ```js
 // make sure to enclose the function in parentheses
 (function(back) {
-  let settings = require('Storage').readJSON('app.json',1)||{};
-  function save(key, value) {
-    settings[key] = value;
-    require('Storage').write('app.json',settings);
-  }
+  function get(key, def) { return require('Settings').get('myappid', key, def); }
+  function set(key, value) { require('Settings').set('myappid', key, value); }
   const appMenu = {
     '': {'title': 'App Settings'},
     '< Back': back,
     'Monkeys': {
-      value: settings.monkeys||12,
-      onchange: (m) => {save('monkeys', m)}
+      value: get('monkeys', 12),
+      onchange: (m) => set('monkeys', m)
     }   
   };
   E.showMenu(appMenu)
 })
 ```
-In this example the app needs to add `app.settings.js` to `storage` in `apps.json`.   
-It should also add `app.json` to `data`, to make sure it is cleaned up when the app is uninstalled.
+In this example the app needs to add `myappid.settings.js` to `storage` in `apps.json`.   
+It should also add `myappid.json` to `data`, to make sure it is cleaned up when the app is uninstalled.
 ```json
-  { "id": "app",
+  { "id": "myappid",
     ...
     "storage": [
       ...
-      {"name":"app.settings.js","url":"settings.js"},
+      {"name":"myappid.settings.js","url":"settings.js"}
     ],
     "data": [
-      {"name":"app.json"}
+      {"name":"myappid.json"}
     ]
   },
 ```

bin/sanitycheck.js

@@ -209,6 +209,8 @@ apps.forEach((app,appIdx) => {
   // prefer "appid.json" over "appid.settings.json" (TODO: change to ERROR once all apps comply?)
   if (dataNames.includes(app.id+".settings.json") && !dataNames.includes(app.id+".json"))
     WARN(`App ${app.id} uses data file ${app.id+'.settings.json'} instead of ${app.id+'.json'}`)
+  else if (dataNames.includes(app.id+".settings.json"))
+    WARN(`App ${app.id} uses data file ${app.id+'.settings.json'}`)
   // settings files should be listed under data, not storage (TODO: change to ERROR once all apps comply?)
   if (fileNames.includes(app.id+".settings.json"))
     WARN(`App ${app.id} uses storage file ${app.id+'.settings.json'} instead of data file`)

modules/Settings.js

@@ -1,16 +1,17 @@
 /*
+- Read/write app settings, stored in <appid>.json
+- Read/write global settings (stored in setting.json)
 
 Usage:
-
 ```
 // read a single app setting
-value = require('Settings').get(appname, key, default);
+value = require('Settings').get(appid, key, default);
 // omit key to read all app settings
 value = require('Settings').get();
 // write a single app setting
-require('Settings').set(appname, key, value)
+require('Settings').set(appid, key, value)
 // omit key and pass an object as values to overwrite all settings
-require('Settings').set(appname, values)
+require('Settings').set(appid, values)
 
 // read Bangle settings by passing the Bangle object instead of an app name
 value = require('Settings').get(Bangle, key, default);
@@ -22,9 +23,9 @@ require('Settings').set(Bangle, key, value)
 
 For example:
 ```
-require('Settings').set('test', 'foo', 123);  // writes to 'test.settings.json'
-require('Settings').set('test', 'bar', 456);  // updates 'test.settings.json'
-// 'test.settings.json' now contains  {baz:123,bam:456}
+require('Settings').set('test', 'foo', 123);        // writes to 'test.json'
+require('Settings').set('test', 'bar', 456);        // updates 'test.json'
+// 'test.json' now contains  {baz:123,bam:456}
 baz = require('Settings').get('test', 'foo');       // baz = 123
 def = require('Settings').get('test', 'jkl', 789);  // def = 789
 all = require('Settings').get('test');              // all = {foo: 123, bar: 456}
@@ -34,7 +35,7 @@ baz = require('Settings').get('test', 'baz');       // baz = undefined
 vibrate = require('Settings').get(Bangle, 'vibrate', true);
 
 // Hint: if your app reads multiple settings, you can create a helper function:
-function s(key, def){return require('Settings').get('myapp', key, def);}
+function s(key, def) { return require('Settings').get('myapp', key, def); }
 var foo = s('foo setting', 'default value'), bar = s('bar setting');
 ```
 
@@ -54,10 +55,7 @@ function get(file, key, def) {
     // get(file) or get(file, def): get all settings
     return (s!==undefined) ? s : key;
   }
-  if (typeof s!=="object" || !(key in s)) {
-    return def;
-  }
-  return s[key];
+  return ((typeof s==="object") && (key in s)) ? s[key] : def;
 }
 
 /**
@@ -74,9 +72,7 @@ function set(file, key, value) {
     return;
   }
   var s = require("Storage").readJSON(file, 1);
-  if (typeof s!=="object") {
-    s = {};
-  }
+  if (typeof s!=="object") s = {};
   s[key] = value;
   require("Storage").write(file, s);
 }
@@ -90,7 +86,7 @@ function set(file, key, value) {
  * @return {*} Setting value (or default if not found)
  */
 exports.get = function(app, key, def) {
-  return get((app===Bangle) ? setting.json : app+".settings.json", key, def);
+  return get((app===Bangle) ? 'setting.json' : app+".json", key, def);
 };
 
 /**
@@ -101,5 +97,5 @@ exports.get = function(app, key, def) {
  * @param {*}             val Value to store
  */
 exports.set = function(app, key, val) {
-  set((app===Bangle) ? setting.json : app+".settings.json", key, val);
+  set((app===Bangle) ? 'setting.json' : app+".json", key, val);
 };