Include route params when initializing stack

Author: brentvatne

src/routers/StackRouter.js

@@ -84,7 +84,8 @@ export default (routeConfigs, stackConfig = {}) => {
         })
       );
     }
-    const params = (route.params || action.params || initialRouteParams) && {
+    const params = (routeConfigs[initialRouteName].params || route.params || action.params || initialRouteParams) && {
+      ...(routeConfigs[initialRouteName].params || {}),
       ...(route.params || {}),
       ...(action.params || {}),
       ...(initialRouteParams || {}),
@@ -104,6 +105,15 @@ export default (routeConfigs, stackConfig = {}) => {
     };
   }
 
+  function getParamsForRouteAndAction(routeName, action) {
+    let routeConfig = routeConfigs[routeName];
+    if (routeConfig && routeConfig.params) {
+      return { ...routeConfig.params, ...action.params };
+    } else {
+      return action.params;
+    }
+  }
+
   const {
     getPathAndParamsForRoute,
     getActionForPathAndParams,