Complete "Updating Contacts with FormData"

Note: "use server" is not good because force the fetch to be action/static so the client doesn't call them again explicitly during render (I think?)

src/app/(sidebar)/contacts/[contactId]/Contact.tsx

@@ -1,57 +1,60 @@
 "use client";
 
-import Form from "next/form";
 import { ContactRecord } from "@/app/data";
+import Form from "next/form";
+import { use } from "react";
+import { useRouter } from "next/navigation";
 
-export default function Contact() {
-  const contact = {
-    first: "Your",
-    last: "Name",
-    avatar: "https://placecats.com/200/200",
-    twitter: "your_handle",
-    notes: "Some notes",
-    favorite: true,
-  };
+export default function Contact({
+  contact
+}: {
+  contact: Promise<ContactRecord>
+}) {
+  const c = use(contact);
+  const router = useRouter();
 
   return (
     <div id="contact">
       <div>
         {/* eslint-disable-next-line @next/next/no-img-element */}
         <img
-          alt={`${contact.first} ${contact.last} avatar`}
-          key={contact.avatar}
-          src={contact.avatar}
+          alt={`${c.first} ${c.last} avatar`}
+          key={c.avatar}
+          src={c.avatar}
         />
       </div>
 
       <div>
         <h1>
-          {contact.first || contact.last ? (
+          {c.first || c.last ? (
             <>
-              {contact.first} {contact.last}
+              {c.first} {c.last}
             </>
           ) : (
             <i>No Name</i>
           )}
-          <Favorite contact={contact}/>
+          <Favorite contact={c}/>
         </h1>
 
-        {contact.twitter ? (
+        {c.twitter ? (
           <p>
             <a
-              href={`https://twitter.com/${contact.twitter}`}
+              href={`https://twitter.com/${c.twitter}`}
             >
-              {contact.twitter}
+              {c.twitter}
             </a>
           </p>
         ) : null}
 
-        {contact.notes ? <p>{contact.notes}</p> : null}
+        {c.notes ? <p>{c.notes}</p> : null}
 
         <div>
-          <Form action="edit">
-            <button type="submit">Edit</button>
-          </Form>
+          <button
+            type="button"
+            onClick={() => router.push(`/contacts/${c.id}/edit`)}
+          >
+            Edit
+          </button>
 
           <Form
             action="destroy"

src/app/(sidebar)/contacts/[contactId]/edit/page.tsx

@@ -0,0 +1,78 @@
+import Form from "next/form";
+import { fetchContact } from "@/app/(sidebar)/loaders";
+import { notFound, redirect } from "next/navigation";
+import { updateContact } from "@/app/data";
+
+
+async function editContact(contactId: string, formData: FormData) {
+  "use server";
+  const updates = Object.fromEntries(formData);
+  await updateContact(contactId, updates);
+  redirect(`/contacts/${contactId}`);
+}
+
+export default async function EditContactPage({
+  params
+}: {
+  params: Promise<{ contactId: string }>
+}) {
+  const { contactId } = await params;
+  const contact = await fetchContact(contactId).then((c) => {
+    if (c === null) notFound();
+    return c;
+  });
+  const editThisContact = editContact.bind(null, contactId);
+
+  return (
+    <Form key={contact.id} id="contact-form" action={editThisContact}>
+      <p>
+        <span>Name</span>
+        <input
+          aria-label="First name"
+          defaultValue={contact.first}
+          name="first"
+          placeholder="First"
+          type="text"
+        />
+        <input
+          aria-label="Last name"
+          defaultValue={contact.last}
+          name="last"
+          placeholder="Last"
+          type="text"
+        />
+      </p>
+      <label>
+        <span>Twitter</span>
+        <input
+          defaultValue={contact.twitter}
+          name="twitter"
+          placeholder="@jack"
+          type="text"
+        />
+      </label>
+      <label>
+        <span>Avatar URL</span>
+        <input
+          aria-label="Avatar URL"
+          defaultValue={contact.avatar}
+          name="avatar"
+          placeholder="https://example.com/avatar.jpg"
+          type="text"
+        />
+      </label>
+      <label>
+        <span>Notes</span>
+        <textarea
+          defaultValue={contact.notes}
+          name="notes"
+          rows={6}
+        />
+      </label>
+      <p>
+        <button type="submit">Save</button>
+        <button type="button">Cancel</button>
+      </p>
+    </Form>
+  );
+}

src/app/(sidebar)/contacts/[contactId]/loading.tsx

@@ -0,0 +1,5 @@
+export default function ContactLoading() {
+  return (
+    <div>Loading Contact...</div>
+  );
+}

src/app/(sidebar)/contacts/[contactId]/not-found.tsx

@@ -0,0 +1,8 @@
+export default function NotFound() {
+  return (
+    <main id="error-page">
+      <h1>404</h1>
+      <p>The requested contact could not be found.</p>
+    </main>
+  );
+}

src/app/(sidebar)/contacts/[contactId]/page.tsx

@@ -0,0 +1,19 @@
+import { notFound } from "next/navigation";
+import Contact from "@/app/(sidebar)/contacts/[contactId]/Contact";
+import { fetchContact } from "@/app/(sidebar)/loaders";
+
+export default async function ContactPage({
+  params
+}: {
+  params: Promise<{ contactId: string }>
+}) {
+  const { contactId } = await params;
+  const contact = fetchContact(contactId).then((c) => {
+    if (c === null) notFound();
+    return c;
+  });
+
+  return (
+    <Contact contact={contact}/>
+  );
+}

src/app/(sidebar)/layout.tsx

@@ -0,0 +1,56 @@
+import React, { Suspense } from "react";
+import Link from "next/link";
+import Form from "next/form";
+import ContactList from "./sidebar-contacts";
+import { createEmptyContact } from "@/app/data";
+import { revalidatePath } from "next/cache";
+import { fetchContacts } from "@/app/(sidebar)/loaders";
+
+async function newContact() {
+  "use server";
+  await createEmptyContact();
+  revalidatePath('/');
+}
+
+export default function SidebarRootLayout({
+  children,
+}: Readonly<{
+  children: React.ReactNode;
+}>) {
+  const contacts = fetchContacts();
+
+  return (
+    <>
+      <div id="sidebar">
+        <h1>
+          <Link href="/about">React Router Contacts</Link>
+        </h1>
+        <div>
+          <Form id="search-form" role="search" action="." formMethod="get">
+            <input
+              aria-label="Search contacts"
+              id="q"
+              name="q"
+              placeholder="Search"
+              type="search"/>
+            <div
+              aria-hidden
+              hidden={true}
+              id="search-spinner"/>
+          </Form>
+          <Form action={newContact}>
+            <button type="submit">New</button>
+          </Form>
+        </div>
+        <nav>
+          <Suspense fallback={<div>Loading...</div>}>
+            <ContactList contacts={contacts}/>
+          </Suspense>
+        </nav>
+      </div>
+      <div id={'detail'}>
+        {children}
+      </div>
+    </>
+  );
+}

src/app/(sidebar)/loaders.ts

@@ -0,0 +1,9 @@
+import { getContact, getContacts } from "@/app/data";
+
+export const fetchContacts = async () => {
+  return await getContacts();
+};
+
+export const fetchContact = async (contactId: string) => {
+  return await getContact(contactId);
+};

src/app/(sidebar)/page.tsx

@@ -0,0 +1,15 @@
+import React from "react";
+
+export default function Home() {
+  return (
+    <p id="index-page">
+      This is a demo for React Router.
+      <br/>
+      Check out{" "}
+      <a href="https://reactrouter.com">
+        the docs at reactrouter.com
+      </a>
+      .
+    </p>
+  );
+}

src/app/(sidebar)/sidebar-contacts.tsx

@@ -0,0 +1,27 @@
+import { ContactRecord } from "@/app/data";
+import React, { use } from "react";
+import Link from "next/link";
+
+export default function ContactList({ contacts }: { contacts: Promise<ContactRecord[]> }) {
+  const allContacts = use(contacts);
+  return (
+    <ul>
+      {allContacts.map((c) => (
+        <li key={c.id}>
+          <Link href={`/contacts/${c.id}`}>
+            {c.first || c.last ? (
+              <>
+                {c.first} {c.last}
+              </>
+            ) : (
+              <i>No Name</i>
+            )}
+            {c.favorite ? (
+              <span>★</span>
+            ) : null}
+          </Link>
+        </li>
+      ))}
+    </ul>
+  );
+}

src/app/about/page.tsx

@@ -0,0 +1,45 @@
+import Link from "next/link";
+
+export default function About() {
+  return (
+    <div id="about">
+      <Link href="/">← Go to demo</Link>
+      <h1>About React Router Contacts</h1>
+
+      <div>
+        <p>
+          This is a demo application showing off some of the
+          powerful features of React Router, including
+          dynamic routing, nested routes, loaders, actions,
+          and more.
+        </p>
+
+        <h2>Features</h2>
+        <p>
+          Explore the demo to see how React Router handles:
+        </p>
+        <ul>
+          <li>
+            Data loading and mutations with loaders and
+            actions
+          </li>
+          <li>
+            Nested routing with parent/child relationships
+          </li>
+          <li>URL-based routing with dynamic segments</li>
+          <li>Pending and optimistic UI</li>
+        </ul>
+
+        <h2>Learn More</h2>
+        <p>
+          Check out the official documentation at{" "}
+          <a href="https://reactrouter.com">
+            reactrouter.com
+          </a>{" "}
+          to learn more about building great web
+          applications with React Router.
+        </p>
+      </div>
+    </div>
+  );
+}

src/app/layout.tsx

@@ -1,9 +1,7 @@
-import type { Metadata } from "next";
 import React from "react";
+import type { Metadata } from "next";
 
 import "./globals.css";
-import Form from "next/form";
-import Link from "next/link";
 
 export const metadata: Metadata = {
   title: "Next.js Address Book",
@@ -18,42 +16,8 @@ export default function RootLayout({
   return (
     <html lang="en">
     <body>
-    <div id="sidebar">
-      <h1>React Router Contacts</h1>
-      <div>
-        <Form id="search-form" role="search" action="." formMethod="get">
-          <input
-            aria-label="Search contacts"
-            id="q"
-            name="q"
-            placeholder="Search"
-            type="search"
-          />
-          <div
-            aria-hidden
-            hidden={true}
-            id="search-spinner"
-          />
-        </Form>
-        <Form action="." formMethod="post">
-          <button type="submit">New</button>
-        </Form>
-      </div>
-      <nav>
-        <ul>
-          <li>
-            <Link href={`/contacts/1`}>Your Name</Link>
-          </li>
-          <li>
-            <Link href={`/contacts/2`}>Your Friend</Link>
-          </li>
-        </ul>
-      </nav>
-    </div>
-    <div id={'detail'}>
-      {children}
-    </div>
+    {children}
     </body>
     </html>
   );
-}
+}

src/app/page.tsx

@@ -1,8 +0,0 @@
-import Form from "next/form";
-import React from "react";
-
-export default function Home() {
-  return (
-    <div></div>
-  );
-}