Backend of public sharing at root (#6103)

app/routes/index.tsx

@@ -4,6 +4,7 @@ import DesktopRedirect from "~/scenes/DesktopRedirect";
 import DelayedMount from "~/components/DelayedMount";
 import FullscreenLoading from "~/components/FullscreenLoading";
 import Route from "~/components/ProfiledRoute";
+import env from "~/env";
 import useQueryNotices from "~/hooks/useQueryNotices";
 import lazyWithRetry from "~/utils/lazyWithRetry";
 import { matchDocumentSlug as slug } from "~/utils/routeHelpers";
@@ -25,30 +26,37 @@ export default function Routes() {
         </DelayedMount>
       }
     >
-      <Switch>
-        <Route exact path="/" component={Login} />
-        <Route exact path="/create" component={Login} />
-        <Route exact path="/logout" component={Logout} />
-        <Route exact path="/desktop-redirect" component={DesktopRedirect} />
+      {env.ROOT_SHARE_ID ? (
+        <Switch>
+          <Route exact path="/" component={SharedDocument} />
+          <Route exact path={`/doc/${slug}`} component={SharedDocument} />
+        </Switch>
+      ) : (
+        <Switch>
+          <Route exact path="/" component={Login} />
+          <Route exact path="/create" component={Login} />
+          <Route exact path="/logout" component={Logout} />
+          <Route exact path="/desktop-redirect" component={DesktopRedirect} />
 
-        <Redirect exact from="/share/:shareId" to="/s/:shareId" />
-        <Route exact path="/s/:shareId" component={SharedDocument} />
+          <Redirect exact from="/share/:shareId" to="/s/:shareId" />
+          <Route exact path="/s/:shareId" component={SharedDocument} />
 
-        <Redirect
-          exact
-          from={`/share/:shareId/doc/${slug}`}
-          to={`/s/:shareId/doc/${slug}`}
-        />
-        <Route
-          exact
-          path={`/s/:shareId/doc/${slug}`}
-          component={SharedDocument}
-        />
+          <Redirect
+            exact
+            from={`/share/:shareId/doc/${slug}`}
+            to={`/s/:shareId/doc/${slug}`}
+          />
+          <Route
+            exact
+            path={`/s/:shareId/doc/${slug}`}
+            component={SharedDocument}
+          />
 
-        <Authenticated>
-          <AuthenticatedRoutes />
-        </Authenticated>
-      </Switch>
+          <Authenticated>
+            <AuthenticatedRoutes />
+          </Authenticated>
+        </Switch>
+      )}
     </React.Suspense>
   );
 }