Remove optimistic update

Add multiple toast when saving challenge
and when first completed challenges

common/app/routes/Hikes/flux/Actions.js

@@ -255,26 +255,40 @@ export default Actions({
     }
 
     // challenge completed
-    const optimisticSave = isSignedIn ?
-      this.post$('/completed-challenge', { id, name, challengeType }) :
-      Observable.just(true);
-
-    const correctAnswer = {
+    let update$;
+    if (isSignedIn) {
+      const body = { id, name, challengeType };
+      update$ = this.postJSON$('/completed-challenge', body)
+        // if post fails, will retry once
+        .retry(3)
+        .map(({ alreadyCompleted, points }) => ({
           transform(state) {
             return {
               ...state,
-          hikesApp: {
-            ...state.hikesApp,
-            isCorrect: true,
-            isPressed: false,
-            delta: [0, 0],
-            mouse: [ userAnswer ? 1000 : -1000, 0]
+              points,
+              toast: {
+                message:
+                  'Challenge saved.' +
+                  (alreadyCompleted ? '' : ' First time Completed!'),
+                title: 'Saved',
+                type: 'info',
+                id: state.toast && state.toast.id ? state.toast.id + 1 : 1
               }
             };
           }
+        }))
+        .catch((errObj => {
+          const err = new Error(errObj.message);
+          err.stack = errObj.stack;
+          return {
+            transform(state) { return { ...state, err }; }
           };
+        }));
+    } else {
+      update$ = Observable.just({ transform: (() => {}) });
+    }
 
-    return Observable.just({
+    const challengeCompleted$ = Observable.just({
       transform(state) {
         const { hikes, currentHike: { id } } = state.hikesApp;
         const currentHike = findNextHike(hikes, id);
@@ -291,10 +305,10 @@ export default Actions({
           },
           toast: {
             title: 'Congratulations!',
-              message: 'Hike completed',
-              id: state.toast && typeof state.toast.id === 'number' ?
+            message: 'Hike completed.' + (isSignedIn ? ' Saving...' : ''),
+            id: state.toast && state.toast.id ?
               state.toast.id + 1 :
-                0,
+              1,
             type: 'success'
           },
           location: {
@@ -304,9 +318,25 @@ export default Actions({
               '/hikes'
           }
         };
-        },
-        optimistic: optimisticSave
-      })
+      }
+    });
+
+    const correctAnswer = {
+      transform(state) {
+        return {
+          ...state,
+          hikesApp: {
+            ...state.hikesApp,
+            isCorrect: true,
+            isPressed: false,
+            delta: [0, 0],
+            mouse: [ userAnswer ? 1000 : -1000, 0]
+          }
+        };
+      }
+    };
+
+    return Observable.merge(challengeCompleted$, update$)
       .delay(300)
       .startWith(correctAnswer)
       .catch(err => Observable.just({