From fa3ec3299b3fa33e5a699683beb96cfa4e6dd51d Mon Sep 17 00:00:00 2001
From: Wes Bos <wesbos@gmail.com>
Date: Tue, 13 Feb 2018 13:19:23 -0500
Subject: getting there

---
 frontend/enhancers/enhancers.js | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

(limited to 'frontend/enhancers/enhancers.js')

diff --git a/frontend/enhancers/enhancers.js b/frontend/enhancers/enhancers.js
index f7021c3..1abdd78 100644
--- a/frontend/enhancers/enhancers.js
+++ b/frontend/enhancers/enhancers.js
@@ -59,7 +59,16 @@ export const addtoCartEnhancer = graphql(ADD_TO_CART_MUTATION, {
   name: 'addToCart',
   options: {
     update: (proxy, payload) => {
-      console.log('=----asdf-asd-fas-df-asdf-sa-df');
+      const newCartItem = payload.data.addToCart;
+      const data = proxy.readQuery({ query: CURRENT_USER_QUERY });
+      const existingIndex = data.me.cart.findIndex(cartItem => cartItem.id === newCartItem.id);
+      if (existingIndex >= 0) {
+        // already in cache, just replace it
+        data.me.cart = [...data.me.cart.slice(0, existingIndex), newCartItem, ...data.me.cart.slice(existingIndex + 1)];
+      } else {
+        data.me.cart = [...data.me.cart, newCartItem];
+      }
+      proxy.writeQuery({ query: CURRENT_USER_QUERY, data });
     },
   },
 });
-- 
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