Change the ClayConfig.getSettings() method to convert data types to be compatible with sendAppMessage

src/scripts/lib/clay-config.js

@@ -158,7 +158,7 @@ function ClayConfig(settings, config, $rootContainer, meta) {
   self.getSettings = function() {
     _checkBuilt('getSettings');
     _.eachObj(_itemsByAppKey, function(appKey, item) {
-      _settings[appKey] = item.get();
+      _settings[appKey] = utils.prepareForAppMessage(item.get());
     });
     return _settings;
   };

src/scripts/lib/utils.js

@@ -17,3 +17,39 @@ module.exports.updateProperties = function(obj, descriptor) {
     Object.defineProperty(obj, prop, descriptor);
   });
 };
+
+/**
+ * Converts the val into a type compatible with Pebble.sendAppMessage().
+ *  - Strings will be returned without modification
+ *  - Numbers will be returned without modification
+ *  - Booleans will be converted to a 0 or 1
+ *  - Arrays that contain strings will be split with a zero.
+ *    eg: ['one', 'two'] becomes ['one', 0, 'two', 0]
+ *  - Arrays that contain numbers will be returned without modification
+ *    eg: [1, 2] becomes [1, 2]
+ *  - Arrays that contain booleans will be converted to a 0 or 1
+ *    eg: [true, false] becomes [1, 0]
+ *  - Arrays must be single dimensional
+ * @param {number|string|boolean|Array} val
+ * @returns {number|string|Array}
+ */
+module.exports.prepareForAppMessage = function(val) {
+  var result;
+
+  if (typeof val === 'boolean') {
+    result = val ? 1 : 0;
+  } else if (Array.isArray(val)) {
+    result = [];
+    val.forEach(function(item) {
+      var itemConverted = module.exports.prepareForAppMessage(item);
+      result.push(itemConverted);
+      if (typeof itemConverted === 'string') {
+        result.push(0);
+      }
+    });
+  } else {
+    result = val;
+  }
+
+  return result;
+};