Handle some GraphQL API edge cases

lib/containers/pr-list-container.js

@@ -12,7 +12,7 @@ export class PrList extends React.Component {
 
   render() {
     const repo = this.props.query.repository;
-    if (!repo.pullRequests.edges.length) {
+    if (!repo || !repo.pullRequests.edges.length) {
       return null; // TODO: no PRs
     }
     const pr = repo.pullRequests.edges[0].node;

lib/controllers/pr-info-controller.js

@@ -4,21 +4,26 @@ import Relay from 'react-relay';
 import {RemotePropType} from '../prop-types';
 import RelayRootContainer from '../containers/relay-root-container';
 import PrListContainer from '../containers/pr-list-container';
+import GithubLoginView from '../views/github-login-view';
 
-const environmentByGithubInstance = new Map();
+const relayConfigByGithubInstance = new Map();
 
 const getEnvironmentForInstance = (instance, endpoint, token) => {
-  let environment = environmentByGithubInstance.get(instance);
+  const config = relayConfigByGithubInstance.get(instance) || {};
+  let {environment, networkLayer} = config;
   if (!environment) {
     environment = new Relay.Environment();
-    environment.injectNetworkLayer(
-      new Relay.DefaultNetworkLayer(`${endpoint}/graphql`, {
-        headers: {
-          Authorization: `bearer ${token}`,
-        },
-      }),
-    );
-    environmentByGithubInstance.set(instance, environment);
+    networkLayer = new Relay.DefaultNetworkLayer(`${endpoint}/graphql`, {
+      headers: {
+        Authorization: `bearer ${token}`,
+      },
+    });
+    environment.injectNetworkLayer(networkLayer);
+    relayConfigByGithubInstance.set(instance, {environment, networkLayer});
+  } else {
+    networkLayer._init.headers = {
+      Authorization: `bearer ${token}`,
+    };
   }
   return environment;
 };
@@ -49,6 +54,8 @@ export default class PrInfoController extends React.Component {
     token: React.PropTypes.string.isRequired,
     instance: React.PropTypes.string.isRequired,
     currentBranch: React.PropTypes.string.isRequired,
+    loginModel: React.PropTypes.object.isRequired,
+    onLogin: React.PropTypes.func.isRequired,
     remote: RemotePropType.isRequired,
   }
 
@@ -68,6 +75,21 @@ export default class PrInfoController extends React.Component {
         Component={PrListContainer}
         route={route}
         environment={environment}
+        renderLoading={() => {
+          return <div>Loading...</div>;
+        }}
+        renderFailure={(err, retry) => {
+          if (err.response && err.response.status === 401) {
+            return (
+              <div>
+                The API endpoint returned a unauthorized error. Please try to re-authenticate with the endpoint.
+                <GithubLoginView onLogin={this.props.onLogin} />
+              </div>
+            );
+          } else {
+            return <div>An unknown error occurred.</div>;
+          }
+        }}
       />
     );
   }

lib/controllers/remote-pr-controller.js

@@ -31,10 +31,14 @@ export default class RemotePrController extends React.Component {
   }
 
   render() {
-    const {instance, endpoint, remote, currentBranch, token} = this.props;
+    const {instance, endpoint, remote, currentBranch, token, loginModel} = this.props;
     return (
       <div className="github-RemotePrController">
-        {token && <PrInfoController {...{instance, endpoint, remote, currentBranch, token}} />}
+        {token && <PrInfoController
+          {...{instance, endpoint, remote, currentBranch, token, loginModel}}
+          onLogin={this.handleLogin}
+                  />
+          }
         {!token && <GithubLoginView onLogin={this.handleLogin} />}
       </div>
     );