feat: 添加创建代码片段界面内容验证

src/actions/index.ts

@@ -17,3 +17,32 @@ export async function deleteSnippet(id: number) {
 
   redirect("/");
 }
+
+export async function createSnippet(
+  formState: { message: string },
+  formData: FormData
+) {
+  // Check the user's inputs and make sure they're valid
+  const title = formData.get("title");
+  const code = formData.get("code");
+  if (typeof title !== "string" || title.length < 3) {
+    return {
+      message: "Title must be longer",
+    };
+  }
+  if (typeof code !== "string" || code.length < 10) {
+    return {
+      message: "Code must be longer",
+    };
+  }
+  // Create a new record in the database
+  const snippet = await db.snippet.create({
+    data: {
+      title: title,
+      code: code,
+    },
+  });
+  console.log(snippet);
+  // Redirect the user back to the root route
+  redirect("/");
+}

src/app/snippets/new/page.tsx

@@ -1,26 +1,15 @@
-import { db } from "@/db";
+"use client";
-import { redirect } from "next/navigation";
+
+import * as actions from "@/actions";
+import { useActionState } from "react";
 
 export default function SnippetCreatePage() {
-  async function createSnippet(formData: FormData) {
+  const [formState, action] = useActionState(actions.createSnippet, {
-    // This needs to be a server action!
+    message: "",
-    "use server";
-    // Check the user's inputs and make sure they're valid
-    const title = formData.get("title") as string;
-    const code = formData.get("code") as string;
-    // Create a new record in the database
-    const snippet = await db.snippet.create({
-      data: {
-        title: title,
-        code: code,
-      },
   });
-    console.log(snippet);
+
-    // Redirect the user back to the root route
-    redirect("/");
-  }
   return (
-    <form action={createSnippet}>
+    <form action={action}>
       <h3 className="font-bold m-3">Create a Snippet</h3>
       <div className="flex flex-col gap-4">
         <div className="flex gap-4">
@@ -39,6 +28,13 @@ export default function SnippetCreatePage() {
           </label>
           <input name="code" className="border rounded p-2 w-full" id="code" />
         </div>
+
+        {formState.message ? (
+          <div className="my-2 p-2 bg-red-200 border rounded border-red-400">
+            {formState.message}
+          </div>
+        ) : null}
+
         <button type="submit" className="rounded p-2 bg-blue-200">
           Create
         </button>