From 1b569371092f7361e86f0f57b81e7fdbf918d051 Mon Sep 17 00:00:00 2001
From: gunshiz <spsshop1047@gmail.com>
Date: Sat, 20 Jun 2026 19:41:14 +0700
Subject: [PATCH] feat: implement debounced auto-save for form settings and
 questions in the admin editor

---
 app/form/admin/client.tsx | 256 +++++++++++++++++++++++++++++---------
 app/form/layout.tsx       |   8 ++
 drizzle.config.ts         |   1 +
 3 files changed, 208 insertions(+), 57 deletions(-)

diff --git a/app/form/admin/client.tsx b/app/form/admin/client.tsx
index 41c32cb..2c9ad20 100644
--- a/app/form/admin/client.tsx
+++ b/app/form/admin/client.tsx
@@ -1,6 +1,6 @@
 "use client";
 
-import React, { useState, useTransition } from "react";
+import React, { useState, useTransition, useRef, useCallback, useEffect } from "react";
 import { useRouter } from "next/navigation";
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
 import { Button } from "@/components/ui/button";
@@ -10,6 +10,8 @@ import { Label } from "@/components/ui/label";
 import { Switch } from "@/components/ui/switch";
 import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
 import { Separator } from "@/components/ui/separator";
+import { RadioGroup, RadioGroupItem } from "@/components/ui/radio-group";
+import { Checkbox } from "@/components/ui/checkbox";
 import { toast } from "sonner";
 import { updateForm } from "@/app/actions/form";
 import {
@@ -19,9 +21,10 @@ import {
   reorderQuestions,
   bulkUpdateQuestions,
 } from "@/app/actions/questions";
-import { Plus, Trash, ArrowUp, ArrowDown, Loader2, Save, Image as ImageIcon, X } from "lucide-react";
+import { Plus, Trash, ArrowUp, ArrowDown, Loader2, Save, Image as ImageIcon, X, Check } from "lucide-react";
 import Image from 'next/image';
 import { RichTextEditor } from "@/components/rich-text-editor";
+import { FormattedText } from "@/components/formatted-text";
 
 interface Question {
   id: string;
@@ -45,6 +48,8 @@ interface FormEditorClientProps {
   initialQuestions: Question[];
 }
 
+type AutoSaveStatus = "idle" | "saving" | "saved";
+
 export default function FormEditorClient({ form, initialQuestions }: FormEditorClientProps) {
   const router = useRouter();
   const [formTitle, setFormTitle] = useState(form.title);
@@ -52,28 +57,92 @@ export default function FormEditorClient({ form, initialQuestions }: FormEditorC
   const [formIsOpen, setFormIsOpen] = useState(form.isOpen);
   const [questions, setQuestions] = useState<Question[]>(initialQuestions);
   const [uploadingId, setUploadingId] = useState<string | null>(null);
-  const [isFormSaving, startFormSaveTransition] = useTransition();
-  const [isQuestionsSaving, startQuestionsSaveTransition] = useTransition();
 
-  const saveFormMetadata = () => {
-    if (!formTitle.trim()) {
-      toast.error("Form title is required.");
-      return;
-    }
+  const [formSaveStatus, setFormSaveStatus] = useState<AutoSaveStatus>("idle");
+  const [questionsSaveStatus, setQuestionsSaveStatus] = useState<AutoSaveStatus>("idle");
 
-    startFormSaveTransition(async () => {
+  const formTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null);
+  const questionsTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null);
+
+  // Refs to always read latest state inside debounced callbacks
+  const formTitleRef = useRef(formTitle);
+  const formDescriptionRef = useRef(formDescription);
+  const formIsOpenRef = useRef(formIsOpen);
+  const questionsRef = useRef(questions);
+
+  formTitleRef.current = formTitle;
+  formDescriptionRef.current = formDescription;
+  formIsOpenRef.current = formIsOpen;
+  questionsRef.current = questions;
+
+  const autoSaveForm = useCallback(() => {
+    if (formTimerRef.current) clearTimeout(formTimerRef.current);
+    setFormSaveStatus("idle");
+    formTimerRef.current = setTimeout(async () => {
+      const title = formTitleRef.current;
+      if (!title.trim()) return;
+      setFormSaveStatus("saving");
       try {
         await updateForm(form.id, {
-          title: formTitle,
-          description: formDescription,
-          isOpen: formIsOpen,
+          title,
+          description: formDescriptionRef.current,
+          isOpen: formIsOpenRef.current,
         });
-        toast.success("Form metadata saved!");
+        setFormSaveStatus("saved");
         router.refresh();
-      } catch (err: any) {
-        toast.error(err.message || "Failed to update form.");
+        setTimeout(() => setFormSaveStatus("idle"), 2000);
+      } catch {
+        toast.error("Failed to auto-save form settings.");
+        setFormSaveStatus("idle");
       }
-    });
+    }, 1000);
+  }, [form.id, router]);
+
+  const autoSaveQuestions = useCallback(() => {
+    if (questionsTimerRef.current) clearTimeout(questionsTimerRef.current);
+    setQuestionsSaveStatus("idle");
+    questionsTimerRef.current = setTimeout(async () => {
+      const current = questionsRef.current;
+      if (current.length === 0) return;
+      setQuestionsSaveStatus("saving");
+      try {
+        const formattedUpdates = current.map(q => ({
+          ...q,
+          options: q.options === null ? [] : q.options,
+          allowOther: q.allowOther,
+        }));
+        await bulkUpdateQuestions(form.id, formattedUpdates);
+        setQuestionsSaveStatus("saved");
+        router.refresh();
+        setTimeout(() => setQuestionsSaveStatus("idle"), 2000);
+      } catch {
+        toast.error("Failed to auto-save questions.");
+        setQuestionsSaveStatus("idle");
+      }
+    }, 1500);
+  }, [form.id, router]);
+
+  // Cleanup timers on unmount
+  useEffect(() => {
+    return () => {
+      if (formTimerRef.current) clearTimeout(formTimerRef.current);
+      if (questionsTimerRef.current) clearTimeout(questionsTimerRef.current);
+    };
+  }, []);
+
+  const handleFormTitleChange = (val: string) => {
+    setFormTitle(val);
+    autoSaveForm();
+  };
+
+  const handleFormDescriptionChange = (val: string) => {
+    setFormDescription(val);
+    autoSaveForm();
+  };
+
+  const handleFormIsOpenChange = (val: boolean) => {
+    setFormIsOpen(val);
+    autoSaveForm();
   };
 
   const handleAddQuestion = async () => {
@@ -96,23 +165,7 @@ export default function FormEditorClient({ form, initialQuestions }: FormEditorC
     setQuestions((prev) =>
       prev.map((q) => (q.id === id ? { ...q, ...updates } as Question : q))
     );
-  };
-
-  const saveQuestions = () => {
-    startQuestionsSaveTransition(async () => {
-      try {
-        const formattedUpdates = questions.map(q => ({
-          ...q,
-          options: q.options === null ? [] : q.options,
-          allowOther: q.allowOther,
-        }));
-        await bulkUpdateQuestions(form.id, formattedUpdates);
-        toast.success("Questions saved!");
-        router.refresh();
-      } catch (err: any) {
-        toast.error(err.message || "Failed to save questions.");
-      }
-    });
+    autoSaveQuestions();
   };
 
   const handleDeleteQuestion = async (id: string) => {
@@ -139,6 +192,7 @@ export default function FormEditorClient({ form, initialQuestions }: FormEditorC
     });
 
     setQuestions(newQuestions);
+    autoSaveQuestions();
   };
 
   const handleImageUpload = async (questionId: string, e: React.ChangeEvent<HTMLInputElement>) => {
@@ -223,8 +277,13 @@ export default function FormEditorClient({ form, initialQuestions }: FormEditorC
     <div className="space-y-6">
       <Card>
         <CardHeader>
-          <CardTitle>Form Settings</CardTitle>
-          <CardDescription>Configure the main title and description of your form.</CardDescription>
+          <div className="flex items-center justify-between">
+            <div>
+              <CardTitle>Form Settings</CardTitle>
+              <CardDescription>Configure the main title and description of your form.</CardDescription>
+            </div>
+            <SaveStatusIndicator status={formSaveStatus} />
+          </div>
         </CardHeader>
         <CardContent className="space-y-4">
           <div className="space-y-2">
@@ -232,7 +291,7 @@ export default function FormEditorClient({ form, initialQuestions }: FormEditorC
             <Input
               id="form-title"
               value={formTitle}
-              onChange={(e) => setFormTitle(e.target.value)}
+              onChange={(e) => handleFormTitleChange(e.target.value)}
               placeholder="e.g. Untitled Form"
             />
           </div>
@@ -241,7 +300,7 @@ export default function FormEditorClient({ form, initialQuestions }: FormEditorC
             <Textarea
               id="form-description"
               value={formDescription}
-              onChange={(e) => setFormDescription(e.target.value)}
+              onChange={(e) => handleFormDescriptionChange(e.target.value)}
               placeholder="Provide a description..."
               className="min-h-20"
             />
@@ -250,35 +309,26 @@ export default function FormEditorClient({ form, initialQuestions }: FormEditorC
             <Switch
               id="form-is-open"
               checked={formIsOpen}
-              onCheckedChange={setFormIsOpen}
+              onCheckedChange={handleFormIsOpenChange}
             />
             <Label htmlFor="form-is-open" className="text-sm font-normal text-muted-foreground">
               Accepting Submissions
             </Label>
           </div>
-          <div className="flex justify-end pt-2">
-            <Button onClick={saveFormMetadata} disabled={isFormSaving} className="gap-2">
-              {isFormSaving ? <Loader2 className="w-4 h-4 animate-spin" /> : <Save className="w-4 h-4" />}
-              Save Settings
-            </Button>
-          </div>
         </CardContent>
       </Card>
 
       <Separator />
 
       <div className="flex items-center justify-between">
-        <h2 className="text-xl font-bold">Questions</h2>
-        <div className="flex items-center gap-2">
-          <Button onClick={saveQuestions} disabled={isQuestionsSaving} className="gap-2">
-            {isQuestionsSaving ? <Loader2 className="w-4 h-4 animate-spin" /> : <Save className="w-4 h-4" />}
-            Save Questions
-          </Button>
-          <Button onClick={handleAddQuestion} variant="outline" className="gap-2">
-            <Plus className="w-4 h-4" />
-            Add Question
-          </Button>
+        <div className="flex items-center gap-3">
+          <h2 className="text-xl font-bold">Questions</h2>
+          <SaveStatusIndicator status={questionsSaveStatus} />
         </div>
+        <Button onClick={handleAddQuestion} variant="outline" className="gap-2">
+          <Plus className="w-4 h-4" />
+          Add Question
+        </Button>
       </div>
 
       <div className="space-y-4">
@@ -305,8 +355,8 @@ export default function FormEditorClient({ form, initialQuestions }: FormEditorC
                     <SelectContent>
                       <SelectItem value="text">Short Answer</SelectItem>
                       <SelectItem value="textarea">Paragraph</SelectItem>
-                      <SelectItem value="radio">Multiple Choice</SelectItem>
-                      <SelectItem value="checkbox">Checkboxes</SelectItem>
+                      <SelectItem value="radio">Choose one</SelectItem>
+                      <SelectItem value="checkbox">Multiple choose</SelectItem>
                     </SelectContent>
                   </Select>
 
@@ -413,6 +463,9 @@ export default function FormEditorClient({ form, initialQuestions }: FormEditorC
                 </div>
               )}
 
+              {/* Preview answer field */}
+              <AnswerPreview question={q} />
+
               <div className="flex justify-between items-center pt-2 border-t border-border">
                 <div className="flex items-center flex-wrap gap-6">
                   <div className="flex items-center gap-2">
@@ -454,3 +507,92 @@ export default function FormEditorClient({ form, initialQuestions }: FormEditorC
     </div>
   );
 }
+
+function SaveStatusIndicator({ status }: { status: AutoSaveStatus }) {
+  if (status === "idle") return null;
+
+  return (
+    <span className="flex items-center gap-1.5 text-xs text-muted-foreground">
+      {status === "saving" && (
+        <>
+          <Loader2 className="w-3 h-3 animate-spin" />
+          Saving...
+        </>
+      )}
+      {status === "saved" && (
+        <>
+          <Check className="w-3 h-3 text-green-500" />
+          Saved
+        </>
+      )}
+    </span>
+  );
+}
+
+function AnswerPreview({ question }: { question: Question }) {
+  const q = question;
+
+  return (
+    <div className="rounded-md border border-dashed border-muted-foreground/30 p-3 bg-muted/30">
+      <Label className="text-xs text-muted-foreground mb-2 block">Answer Preview</Label>
+
+      {q.type === "text" && (
+        <Input
+          placeholder="Short answer text"
+          disabled
+          className="max-w-sm"
+        />
+      )}
+
+      {q.type === "textarea" && (
+        <Textarea
+          placeholder="Long answer text"
+          disabled
+          className="max-w-sm min-h-20 resize-none"
+        />
+      )}
+
+      {q.type === "radio" && (
+        <RadioGroup className="space-y-2">
+          {(q.options || []).map((opt, idx) => (
+            <div key={idx} className="flex items-center space-x-2">
+              <RadioGroupItem value={opt} id={`preview-${q.id}-${idx}`} />
+              <Label htmlFor={`preview-${q.id}-${idx}`} className="font-normal text-sm cursor-pointer">
+                <FormattedText text={opt} />
+              </Label>
+            </div>
+          ))}
+          {q.allowOther && (
+            <div className="flex items-center space-x-2">
+              <RadioGroupItem value="__OTHER__" id={`preview-${q.id}-other`} />
+              <Label htmlFor={`preview-${q.id}-other`} className="font-normal text-sm text-muted-foreground cursor-pointer">
+                Other...
+              </Label>
+            </div>
+          )}
+        </RadioGroup>
+      )}
+
+      {q.type === "checkbox" && (
+        <div className="space-y-2">
+          {(q.options || []).map((opt, idx) => (
+            <div key={idx} className="flex items-center space-x-2">
+              <Checkbox id={`preview-${q.id}-${idx}`} />
+              <Label htmlFor={`preview-${q.id}-${idx}`} className="font-normal text-sm cursor-pointer">
+                <FormattedText text={opt} />
+              </Label>
+            </div>
+          ))}
+          {q.allowOther && (
+            <div className="flex items-center space-x-2">
+              <Checkbox id={`preview-${q.id}-other`} />
+              <Label htmlFor={`preview-${q.id}-other`} className="font-normal text-sm text-muted-foreground cursor-pointer">
+                Other...
+              </Label>
+            </div>
+          )}
+        </div>
+      )}
+    </div>
+  );
+}
diff --git a/app/form/layout.tsx b/app/form/layout.tsx
index d0da9be..50d5d95 100644
--- a/app/form/layout.tsx
+++ b/app/form/layout.tsx
@@ -2,6 +2,14 @@ import { getServerSession } from "next-auth";
 import { authOptions } from "@/app/api/auth/[...nextauth]/route";
 import { FormLayoutClient } from "./client";
 import LoginDialog from "@/components/login-dialog";
+import { Metadata } from "next";
+
+export const metadata: Metadata = {
+  title: {
+    default: "Erika! - กรอกแบบฟอร์ม",
+    template: "%s | Erika!",
+  },
+}
 
 export default async function FormLayout({
   children,
diff --git a/drizzle.config.ts b/drizzle.config.ts
index 5d62398..ef59c7d 100644
--- a/drizzle.config.ts
+++ b/drizzle.config.ts
@@ -7,4 +7,5 @@ export default defineConfig({
   dbCredentials: {
     url: process.env.DATABASE_URL!,
   },
+  schemaFilter: ["public", "account"],
 });