Optimistic UI profile modal

app/controllers/application_controller.rb

@@ -1,5 +1,6 @@
 class ApplicationController < ActionController::Base
   include Pagy::Method
+  include UserProfileable
 
   # Only allow modern browsers supporting webp images, web push, badges, import maps, CSS nesting, and CSS :has.
   allow_browser versions: :modern

app/controllers/concerns/user_profileable.rb

@@ -0,0 +1,22 @@
+module UserProfileable
+  extend ActiveSupport::Concern
+
+  included do
+    inertia_share do
+      {
+        user_profile_id: params[:user_profile_id]&.to_i,
+        user_profile: load_user_profile
+      }.compact
+    end
+  end
+
+  private
+
+  def load_user_profile
+    return nil if params[:user_profile_id].blank?
+    sleep 1
+
+    User.find_by(id: params[:user_profile_id])
+      &.as_json(only: [ :username, :email, :about_me, :id, :topics_count, :messages_count ])
+  end
+end

app/frontend/components/Avatar.tsx

@@ -1,20 +1,35 @@
+import { Link, router } from '@inertiajs/react'
 import { User } from '../types'
 
 const Avatar = ({ user }: { user: User }) => {
-  const { username } = user;
+  const { username, id } = user;
 
   if (!user) {
     return null;
   }
 
+  const handleClick = (url: string) => {
+    router.push({
+      url,
+      props: (currentProps) => ({ ...currentProps, user_profile_id: id }),
+      preserveState: true,
+      preserveScroll: true,
+    })
+  }
+
   return (
-    <div
+    <Link
+      href=""
+      data={{ user_profile_id: id }}
+      only={['user_profile', 'user_profile_id']}
       className="w-8 h-8 rounded-full bg-sky-100 flex items-center justify-center text-sky-600 text-xs font-medium"
       title={username}
+      // preserveUrl // If we don't want shareable links
+      onBefore={(e) => handleClick(e.url.toString())}
     >
       {username.charAt(0).toUpperCase()}
-    </div>
+    </Link>
   )
 }
 
-export default Avatar
+export default Avatar

app/frontend/components/UserProfileModal.tsx

@@ -0,0 +1,47 @@
+import Modal from './Modal'
+import {router, usePage} from '@inertiajs/react'
+
+import LoadingSpinner from '@/components/LoadingSpinner';
+import UserProfile from '@/components/UserProfile';
+import type {User} from '@/types'
+
+export default function UserProfileModal() {
+  const {props: {user_profile_id: userProfileId, user_profile: userProfile}} = usePage<{
+    user_profile_id: number,
+    user_profile: User
+  }>()
+
+  const isLoading = userProfileId && !userProfile;
+
+  const handleClose = () => {
+    const pathname = window.location.pathname;
+    const params = new URLSearchParams(window.location.search);
+    params.delete('user_profile_id');
+
+    const queryString = params.toString();
+    const url = queryString ? `${pathname}?${queryString}` : pathname;
+
+    router.visit(url, {
+      preserveScroll: true,
+      preserveState: true,
+      onBefore: (e) => {
+        router.push({
+          url: e.url.toString(),
+          props: (currentProps) => ({...currentProps, user_profile_id: null}),
+          preserveState: true,
+          preserveScroll: true,
+        })
+      }
+    })
+  }
+
+  return (
+    <Modal isOpen={!!userProfileId} onClose={handleClose} title='User Profile'>
+      {isLoading ? (
+        <LoadingSpinner/>
+      ) : (
+        <UserProfile user={userProfile} onClose={handleClose}/>
+      )}
+    </Modal>
+  )
+}

app/frontend/layouts/AppLayout.tsx

@@ -6,8 +6,10 @@ import {
   MagnifyingGlassIcon,
   ChevronDownIcon
 } from '@heroicons/react/24/outline'
+
 import { User } from '@/types'
 import Sidebar from "@/components/Sidebar";
+import UserProfileModal from '../components/UserProfileModal'
 
 interface AppLayoutProps {
   children: ReactNode
@@ -95,6 +97,7 @@ export default function AppLayout({ children }: AppLayoutProps) {
           {children}
         </main>
       </div>
+      <UserProfileModal />
     </div>
   )
 }