#9 revert old state if save request fails

Seitenbau · Apr 16, 2018 · f99b985 · f99b985
1 parent 89aa344
commit f99b985
Showing 1 changed file with 6 additions and 2 deletions.
diff --git a/src/components/metaEditable/actions.js b/src/components/metaEditable/actions.js
@@ -45,7 +45,10 @@ const actions = ({ setState }) => ({
   },
 
   handleSave: (state, newMeta, src) => {
-    // we're optimistic, so update client state
+    // keep old state for the case we need to revert
+    const oldData = JSON.stringify(state.data);
+
+    // we're optimistic, so update client state immediately
     const newData = setNewMetaInTree(
       JSON.parse(JSON.stringify(state.data)),
       newMeta
@@ -63,7 +66,8 @@ const actions = ({ setState }) => ({
     }).then(response => {
       if (!response.ok) {
         alert(`Error while saving: ${response.statusText} ${response.url}`);
-        // TODO revert client state
+        // revert client state
+        setState({ data: JSON.parse(oldData) });
       }
     });
   }