feat: introduce snackbars for GQL errors

packages/web/src/components/ApolloProvider/index.tsx

@@ -1,11 +1,23 @@
+import * as React from 'react';
 import { ApolloProvider as BaseApolloProvider } from '@apollo/client';
-import client from 'graphql/client';
+import { useSnackbar } from 'notistack';
+import client, { setLink } from 'graphql/client';
 
 type ApolloProviderProps = {
   children: React.ReactNode;
 };
 
 const ApolloProvider = (props: ApolloProviderProps) => {
+  const { enqueueSnackbar } = useSnackbar();
+
+  const onError = React.useCallback((message) => {
+    enqueueSnackbar(message, { variant: 'error' });
+  }, [enqueueSnackbar]);
+
+  React.useEffect(() => {
+    setLink({ onError })
+  },  [onError]);
+
   return (
     <BaseApolloProvider client={client} {...props} />
   );

packages/web/src/graphql/client.ts

@@ -1,10 +1,23 @@
 import { ApolloClient } from '@apollo/client';
 import cache from './cache';
+import createLink from './link';
 import appConfig from 'config/app';
 
+type CreateClientOptions = {
+  onError?: (message: string) => void;
+};
+
 const client = new ApolloClient({
-  uri: appConfig.graphqlUrl,
+  cache,
-  cache
+  link: createLink({ uri: appConfig.graphqlUrl })
 });
 
+export function setLink({ onError }: CreateClientOptions) {
+  const link = createLink({ uri: appConfig.graphqlUrl, onError });
+
+  client.setLink(link);
+
+  return client;
+};
+
 export default client;

packages/web/src/graphql/link.ts

@@ -0,0 +1,31 @@
+import { HttpLink, from } from "@apollo/client";
+import { onError } from "@apollo/client/link/error";
+
+type CreateLinkOptions = {
+  uri: string;
+  onError?: (message: string) => void;
+};
+
+const createHttpLink = (uri: CreateLinkOptions['uri']) => new HttpLink({ uri });
+
+const createErrorLink = (callback: CreateLinkOptions['onError']) => onError(({ graphQLErrors, networkError }) => {
+  if (graphQLErrors)
+    graphQLErrors.forEach(({ message, locations, path }) => {
+      callback?.(message);
+
+      console.log(
+        `[GraphQL error]: Message: ${message}, Location: ${locations}, Path: ${path}`,
+      );
+    });
+
+  if (networkError) {
+    callback?.(networkError.toString())
+    console.log(`[Network error]: ${networkError}`);
+  }
+});
+
+const createLink = ({ uri, onError = function() {} }: CreateLinkOptions) => {
+  return from([createErrorLink(onError), createHttpLink(uri)]);
+};
+
+export default createLink;

packages/web/src/index.tsx

@@ -10,19 +10,19 @@ import routes from 'routes';
 import reportWebVitals from './reportWebVitals';
 
 ReactDOM.render(
+  <SnackbarProvider>
     <ApolloProvider>
       <IntlProvider>
         <ThemeProvider>
-        <SnackbarProvider>
             <Router>
               <Layout>
                 {routes}
               </Layout>
             </Router>
-        </SnackbarProvider>
         </ThemeProvider>
       </IntlProvider>
-  </ApolloProvider>,
+    </ApolloProvider>
+  </SnackbarProvider>,
   document.getElementById('root')
 )