feat(folders): 添加公开文件夹和收藏功能

- 新增文件夹可见性控制（公开/私有）
- 添加公开文件夹浏览和搜索
- 实现文件夹收藏功能
- 新增 FolderFavorite 数据模型
- 更新 Prisma 至 7.4.2
- 添加相关 i18n 翻译

messages/en-US.json

@@ -24,7 +24,22 @@
     "noFoldersYet": "No folders yet",
     "folderInfo": "ID: {id} • {totalPairs} pairs",
     "enterFolderName": "Enter folder name:",
-    "confirmDelete": "Type \"{name}\" to delete:"
+    "confirmDelete": "Type \"{name}\" to delete:",
+    "myFolders": "My Folders",
+    "publicFolders": "Public Folders",
+    "public": "Public",
+    "private": "Private",
+    "setPublic": "Set Public",
+    "setPrivate": "Set Private",
+    "publicFolderInfo": "{userName} • {totalPairs} pairs",
+    "searchPlaceholder": "Search public folders...",
+    "loading": "Loading...",
+    "noPublicFolders": "No public folders found",
+    "unknownUser": "Unknown User",
+    "enterNewName": "Enter new name:",
+    "favorite": "Favorite",
+    "unfavorite": "Unfavorite",
+    "pleaseLogin": "Please login first"
   },
   "folder_id": {
     "unauthorized": "You are not the owner of this folder",

messages/zh-CN.json

@@ -24,7 +24,22 @@
     "noFoldersYet": "还没有文件夹",
     "folderInfo": "ID: {id} • {totalPairs} 个文本对",
     "enterFolderName": "输入文件夹名称：",
-    "confirmDelete": "输入 \"{name}\" 以删除："
+    "confirmDelete": "输入 \"{name}\" 以删除：",
+    "myFolders": "我的文件夹",
+    "publicFolders": "公开文件夹",
+    "public": "公开",
+    "private": "私有",
+    "setPublic": "设为公开",
+    "setPrivate": "设为私有",
+    "publicFolderInfo": "{userName} • {totalPairs} 个文本对",
+    "searchPlaceholder": "搜索公开文件夹...",
+    "loading": "加载中...",
+    "noPublicFolders": "没有找到公开文件夹",
+    "unknownUser": "未知用户",
+    "enterNewName": "输入新名称：",
+    "favorite": "收藏",
+    "unfavorite": "取消收藏",
+    "pleaseLogin": "请先登录"
   },
   "folder_id": {
     "unauthorized": "您不是此文件夹的所有者",

package.json

@@ -11,8 +11,8 @@
     "lint": "eslint"
   },
   "dependencies": {
-    "@prisma/adapter-pg": "^7.2.0",
+    "@prisma/adapter-pg": "^7.4.2",
-    "@prisma/client": "^7.2.0",
+    "@prisma/client": "7.4.2",
     "bcryptjs": "^3.0.3",
     "better-auth": "^1.4.10",
     "class-variance-authority": "^0.7.1",
@@ -43,7 +43,7 @@
     "eslint": "^9.39.2",
     "eslint-config-next": "16.1.1",
     "eslint-plugin-react": "^7.37.5",
-    "prisma": "^7.2.0",
+    "prisma": "^7.4.2",
     "tailwindcss": "^4.1.18",
     "typescript": "^5.9.3"
   },

prisma/schema.prisma

@@ -20,6 +20,7 @@ model User {
   accounts             Account[]
   dictionaryLookUps    DictionaryLookUp[]
   folders              Folder[]
+  folderFavorites      FolderFavorite[]
   sessions             Session[]
   translationHistories TranslationHistory[]
 
@@ -91,19 +92,42 @@ model Pair {
   @@map("pairs")
 }
 
+enum Visibility {
+  PRIVATE
+  PUBLIC
+}
+
 model Folder {
   id         Int              @id @default(autoincrement())
   name       String
   userId     String           @map("user_id")
+  visibility Visibility       @default(PRIVATE)
   createdAt  DateTime         @default(now()) @map("created_at")
   updatedAt  DateTime         @updatedAt @map("updated_at")
   user       User             @relation(fields: [userId], references: [id], onDelete: Cascade)
   pairs      Pair[]
+  favorites  FolderFavorite[]
 
   @@index([userId])
+  @@index([visibility])
   @@map("folders")
 }
 
+model FolderFavorite {
+  id        Int      @id @default(autoincrement())
+  userId    String   @map("user_id")
+  folderId  Int      @map("folder_id")
+  createdAt DateTime @default(now()) @map("created_at")
+
+  user   User   @relation(fields: [userId], references: [id], onDelete: Cascade)
+  folder Folder @relation(fields: [folderId], references: [id], onDelete: Cascade)
+
+  @@unique([userId, folderId])
+  @@index([userId])
+  @@index([folderId])
+  @@map("folder_favorites")
+}
+
 model DictionaryLookUp {
   id               Int             @id @default(autoincrement())
   userId           String?         @map("user_id")

src/app/folders/FoldersClient.tsx

@@ -5,6 +5,10 @@ import {
   Folder as Fd,
   FolderPen,
   FolderPlus,
+  Globe,
+  Heart,
+  Lock,
+  Search,
   Trash2,
 } from "lucide-react";
 import { CircleButton, LightButton } from "@/design-system/base/button";
@@ -15,18 +19,41 @@ import { toast } from "sonner";
 import { PageLayout } from "@/components/ui/PageLayout";
 import { PageHeader } from "@/components/ui/PageHeader";
 import { CardList } from "@/components/ui/CardList";
-import { actionCreateFolder, actionDeleteFolderById, actionGetFoldersWithTotalPairsByUserId, actionRenameFolderById } from "@/modules/folder/folder-aciton";
+import {
-import { TSharedFolderWithTotalPairs } from "@/shared/folder-type";
+  actionCreateFolder,
+  actionDeleteFolderById,
+  actionGetFoldersWithTotalPairsByUserId,
+  actionRenameFolderById,
+  actionSearchPublicFolders,
+  actionSetFolderVisibility,
+  actionToggleFavorite,
+  actionCheckFavorite,
+} from "@/modules/folder/folder-aciton";
+import { TPublicFolder, TSharedFolderWithTotalPairs } from "@/shared/folder-type";
+
+type TabType = "my" | "public";
 
 interface FolderProps {
   folder: TSharedFolderWithTotalPairs;
   refresh: () => void;
+  showVisibility?: boolean;
 }
 
-const FolderCard = ({ folder, refresh }: FolderProps) => {
+const FolderCard = ({ folder, refresh, showVisibility = true }: FolderProps) => {
   const router = useRouter();
   const t = useTranslations("folders");
 
+  const handleToggleVisibility = async (e: React.MouseEvent) => {
+    e.stopPropagation();
+    const newVisibility = folder.visibility === "PUBLIC" ? "PRIVATE" : "PUBLIC";
+    const result = await actionSetFolderVisibility(folder.id, newVisibility);
+    if (result.success) {
+      refresh();
+    } else {
+      toast.error(result.message);
+    }
+  };
+
   return (
     <div
       className="flex justify-between items-center group py-4 px-5 border-b border-gray-200 last:border-b-0 hover:bg-gray-50 cursor-pointer transition-colors"
@@ -40,7 +67,19 @@ const FolderCard = ({ folder, refresh }: FolderProps) => {
         </div>
 
         <div className="flex-1 min-w-0">
+          <div className="flex items-center gap-2">
             <h3 className="font-semibold text-gray-900 truncate">{folder.name}</h3>
+            {showVisibility && (
+              <span className="flex items-center gap-1 text-xs text-gray-400">
+                {folder.visibility === "PUBLIC" ? (
+                  <Globe size={12} />
+                ) : (
+                  <Lock size={12} />
+                )}
+                {folder.visibility === "PUBLIC" ? t("public") : t("private")}
+              </span>
+            )}
+          </div>
           <p className="text-sm text-gray-500 mt-0.5">
             {t("folderInfo", {
               id: folder.id,
@@ -52,10 +91,22 @@ const FolderCard = ({ folder, refresh }: FolderProps) => {
       </div>
 
       <div className="flex items-center gap-1 ml-4">
+        {showVisibility && (
+          <CircleButton
+            onClick={handleToggleVisibility}
+            title={folder.visibility === "PUBLIC" ? t("setPrivate") : t("setPublic")}
+          >
+            {folder.visibility === "PUBLIC" ? (
+              <Lock size={18} />
+            ) : (
+              <Globe size={18} />
+            )}
+          </CircleButton>
+        )}
         <CircleButton
           onClick={(e: React.MouseEvent) => {
             e.stopPropagation();
-            const newName = prompt("Input a new name.")?.trim();
+            const newName = prompt(t("enterNewName"))?.trim();
             if (newName && newName.length > 0) {
               actionRenameFolderById(folder.id, newName)
                 .then(result => {
@@ -97,74 +148,227 @@ const FolderCard = ({ folder, refresh }: FolderProps) => {
   );
 };
 
-export function FoldersClient({ userId }: { userId: string; }) {
+interface PublicFolderCardProps {
+  folder: TPublicFolder;
+  currentUserId?: string;
+  onFavoriteChange?: () => void;
+}
+
+const PublicFolderCard = ({ folder, currentUserId, onFavoriteChange }: PublicFolderCardProps) => {
+  const router = useRouter();
   const t = useTranslations("folders");
-  const [folders, setFolders] = useState<TSharedFolderWithTotalPairs[]>(
+  const [isFavorited, setIsFavorited] = useState(false);
-    [],
+  const [favoriteCount, setFavoriteCount] = useState(folder.favoriteCount);
-  );
-  const [loading, setLoading] = useState(false);
 
   useEffect(() => {
-    setLoading(true);
+    if (currentUserId) {
-    actionGetFoldersWithTotalPairsByUserId(userId)
+      actionCheckFavorite(folder.id).then(result => {
-      .then((folders) => {
+        if (result.success && result.data) {
-        if (folders.success && folders.data) {
+          setIsFavorited(result.data.isFavorited);
-          setFolders(folders.data);
+          setFavoriteCount(result.data.favoriteCount);
-          setLoading(false);
         }
       });
+    }
+  }, [folder.id, currentUserId]);
+
+  const handleToggleFavorite = async (e: React.MouseEvent) => {
+    e.stopPropagation();
+    if (!currentUserId) {
+      toast.error(t("pleaseLogin"));
+      return;
+    }
+    const result = await actionToggleFavorite(folder.id);
+    if (result.success && result.data) {
+      setIsFavorited(result.data.isFavorited);
+      setFavoriteCount(result.data.favoriteCount);
+      onFavoriteChange?.();
+    } else {
+      toast.error(result.message);
+    }
+  };
+
+  return (
+    <div
+      className="flex justify-between items-center group py-4 px-5 border-b border-gray-200 last:border-b-0 hover:bg-gray-50 cursor-pointer transition-colors"
+      onClick={() => {
+        router.push(`/folders/${folder.id}`);
+      }}
+    >
+      <div className="flex items-center gap-4 flex-1">
+        <div className="shrink-0 text-primary-500">
+          <Fd size={24} />
+        </div>
+
+        <div className="flex-1 min-w-0">
+          <h3 className="font-semibold text-gray-900 truncate">{folder.name}</h3>
+          <p className="text-sm text-gray-500 mt-0.5">
+            {t("publicFolderInfo", {
+              userName: folder.userName ?? folder.userUsername ?? t("unknownUser"),
+              totalPairs: folder.totalPairs,
+            })}
+          </p>
+        </div>
+      </div>
+
+      <div className="flex items-center gap-2">
+        <div className="flex items-center gap-1 text-sm text-gray-400">
+          <Heart
+            size={14}
+            className={isFavorited ? "fill-red-500 text-red-500" : ""}
+          />
+          <span>{favoriteCount}</span>
+        </div>
+        <CircleButton
+          onClick={handleToggleFavorite}
+          title={isFavorited ? t("unfavorite") : t("favorite")}
+        >
+          <Heart
+            size={18}
+            className={isFavorited ? "fill-red-500 text-red-500" : ""}
+          />
+        </CircleButton>
+        <ChevronRight size={20} className="text-gray-400" />
+      </div>
+    </div>
+  );
+};
+
+interface FoldersClientProps {
+  userId: string | null;
+  initialPublicFolders: TPublicFolder[];
+}
+
+export function FoldersClient({ userId, initialPublicFolders }: FoldersClientProps) {
+  const t = useTranslations("folders");
+  const [folders, setFolders] = useState<TSharedFolderWithTotalPairs[]>([]);
+  const [publicFolders, setPublicFolders] = useState<TPublicFolder[]>(initialPublicFolders);
+  const [loading, setLoading] = useState(false);
+  const [activeTab, setActiveTab] = useState<TabType>(userId ? "my" : "public");
+  const [searchQuery, setSearchQuery] = useState("");
+
+  useEffect(() => {
+    if (userId) {
+      setLoading(true);
+      actionGetFoldersWithTotalPairsByUserId(userId)
+        .then((result) => {
+          if (result.success && result.data) {
+            setFolders(result.data);
+          }
+        })
+        .finally(() => {
+          setLoading(false);
+        });
+    }
   }, [userId]);
 
   const updateFolders = async () => {
+    if (!userId) return;
     setLoading(true);
-    await actionGetFoldersWithTotalPairsByUserId(userId)
+    const result = await actionGetFoldersWithTotalPairsByUserId(userId);
-      .then(async result => {
+    if (result.success && result.data) {
-        if (!result.success) toast.error(result.message);
+      setFolders(result.data);
-        else await actionGetFoldersWithTotalPairsByUserId(userId)
-          .then((folders) => {
-            if (folders.success && folders.data) {
-              setFolders(folders.data);
     }
-          });
-      });
     setLoading(false);
   };
 
+  const handleSearch = async () => {
+    if (!searchQuery.trim()) {
+      setPublicFolders(initialPublicFolders);
+      return;
+    }
+    setLoading(true);
+    const result = await actionSearchPublicFolders(searchQuery.trim());
+    if (result.success && result.data) {
+      setPublicFolders(result.data);
+    }
+    setLoading(false);
+  };
+
+  const handleCreateFolder = async () => {
+    if (!userId) return;
+    const folderName = prompt(t("enterFolderName"));
+    if (!folderName) return;
+    setLoading(true);
+    try {
+      const result = await actionCreateFolder(userId, folderName);
+      if (result.success) {
+        updateFolders();
+      } else {
+        toast.error(result.message);
+      }
+    } finally {
+      setLoading(false);
+    }
+  };
+
   return (
     <PageLayout>
       <PageHeader title={t("title")} subtitle={t("subtitle")} />
 
-      {/* 新建文件夹按钮 */}
+      <div className="flex items-center gap-2 mb-4">
+        {userId && (
+          <button
+            onClick={() => setActiveTab("my")}
+            className={`px-4 py-2 rounded-lg text-sm font-medium transition-colors ${
+              activeTab === "my"
+                ? "bg-primary-500 text-white"
+                : "bg-gray-100 text-gray-600 hover:bg-gray-200"
+            }`}
+          >
+            {t("myFolders")}
+          </button>
+        )}
+        <button
+          onClick={() => setActiveTab("public")}
+          className={`px-4 py-2 rounded-lg text-sm font-medium transition-colors ${
+            activeTab === "public"
+              ? "bg-primary-500 text-white"
+              : "bg-gray-100 text-gray-600 hover:bg-gray-200"
+          }`}
+        >
+          {t("publicFolders")}
+        </button>
+      </div>
+
+      {activeTab === "public" && (
+        <div className="flex items-center gap-2 mb-4">
+          <div className="relative flex-1">
+            <Search size={18} className="absolute left-3 top-1/2 -translate-y-1/2 text-gray-400" />
+            <input
+              type="text"
+              value={searchQuery}
+              onChange={(e) => setSearchQuery(e.target.value)}
+              onKeyDown={(e) => e.key === "Enter" && handleSearch()}
+              placeholder={t("searchPlaceholder")}
+              className="w-full pl-10 pr-4 py-2 border border-gray-200 rounded-lg focus:outline-none focus:ring-2 focus:ring-primary-500"
+            />
+          </div>
+          <CircleButton onClick={handleSearch}>
+            <Search size={18} />
+          </CircleButton>
+        </div>
+      )}
+
+      {activeTab === "my" && userId && (
         <LightButton
-        onClick={async () => {
+          onClick={handleCreateFolder}
-          const folderName = prompt(t("enterFolderName"));
-          if (!folderName) return;
-          setLoading(true);
-          try {
-            await actionCreateFolder(userId, folderName)
-              .then(result => {
-                if (result.success) {
-                  updateFolders();
-                } else {
-                  toast.error(result.message);
-                }
-              });
-          } finally {
-            setLoading(false);
-          }
-        }}
           disabled={loading}
           className="w-full border-dashed"
         >
           <FolderPlus size={20} />
           <span>{loading ? t("creating") : t("newFolder")}</span>
         </LightButton>
+      )}
 
-      {/* 文件夹列表 */}
       <div className="mt-4">
         <CardList>
-          {folders.length === 0 ? (
+          {loading ? (
-            // 空状态
+            <div className="p-8 text-center">
+              <div className="w-8 h-8 border-2 border-gray-200 border-t-gray-400 rounded-full animate-spin mx-auto mb-3"></div>
+              <p className="text-sm text-gray-500">{t("loading")}</p>
+            </div>
+          ) : activeTab === "my" && userId ? (
+            folders.length === 0 ? (
               <div className="text-center py-12 text-gray-400">
                 <div className="w-16 h-16 mx-auto mb-3 rounded-full bg-gray-100 flex items-center justify-center">
                   <FolderPlus size={24} className="text-gray-400" />
@@ -172,7 +376,6 @@ export function FoldersClient({ userId }: { userId: string; }) {
                 <p className="text-sm">{t("noFoldersYet")}</p>
               </div>
             ) : (
-            // 文件夹卡片列表
               folders
                 .toSorted((a, b) => a.id - b.id)
                 .map((folder) => (
@@ -180,8 +383,28 @@ export function FoldersClient({ userId }: { userId: string; }) {
                     key={folder.id}
                     folder={folder}
                     refresh={updateFolders}
+                    showVisibility={true}
                   />
                 ))
+            )
+          ) : (
+            publicFolders.length === 0 ? (
+              <div className="text-center py-12 text-gray-400">
+                <div className="w-16 h-16 mx-auto mb-3 rounded-full bg-gray-100 flex items-center justify-center">
+                  <Fd size={24} className="text-gray-400" />
+                </div>
+                <p className="text-sm">{t("noPublicFolders")}</p>
+              </div>
+            ) : (
+              publicFolders.map((folder) => (
+                <PublicFolderCard
+                  key={folder.id}
+                  folder={folder}
+                  currentUserId={userId ?? undefined}
+                  onFavoriteChange={handleSearch}
+                />
+              ))
+            )
           )}
         </CardList>
       </div>

src/app/folders/[folder_id]/page.tsx

@@ -3,7 +3,7 @@ import { getTranslations } from "next-intl/server";
 import { InFolder } from "./InFolder";
 import { auth } from "@/auth";
 import { headers } from "next/headers";
-import { actionGetUserIdByFolderId } from "@/modules/folder/folder-aciton";
+import { actionGetFolderVisibility } from "@/modules/folder/folder-aciton";
 
 export default async function FoldersPage({
   params,
@@ -18,9 +18,19 @@ export default async function FoldersPage({
     redirect("/folders");
   }
 
-  // Allow non-authenticated users to view folders (read-only mode)
+  const folderInfo = (await actionGetFolderVisibility(Number(folder_id))).data;
-  const folderUserId = (await actionGetUserIdByFolderId(Number(folder_id))).data;
+
-  const isOwner = session?.user?.id === folderUserId;
+  if (!folderInfo) {
+    redirect("/folders");
+  }
+
+  const isOwner = session?.user?.id === folderInfo.userId;
+  const isPublic = folderInfo.visibility === "PUBLIC";
+
+  if (!isOwner && !isPublic) {
+    redirect("/folders");
+  }
+
   const isReadOnly = !isOwner;
 
   return <InFolder folderId={Number(folder_id)} isReadOnly={isReadOnly} />;

src/app/folders/page.tsx

@@ -1,12 +1,29 @@
 import { auth } from "@/auth";
 import { FoldersClient } from "./FoldersClient";
-import { redirect } from "next/navigation";
 import { headers } from "next/headers";
+import { actionGetPublicFolders } from "@/modules/folder/folder-aciton";
 
 export default async function FoldersPage() {
   const session = await auth.api.getSession(
     { headers: await headers() }
   );
-  if (!session) redirect(`/login?redirect=/folders`);
+
-  return <FoldersClient userId={session.user.id} />;
+  const publicFoldersResult = await actionGetPublicFolders();
+  const publicFolders = publicFoldersResult.success ? publicFoldersResult.data ?? [] : [];
+
+  if (!session) {
+    return (
+      <FoldersClient
+        userId={null}
+        initialPublicFolders={publicFolders}
+      />
+    );
+  }
+
+  return (
+    <FoldersClient
+      userId={session.user.id}
+      initialPublicFolders={publicFolders}
+    />
+  );
 }

src/modules/folder/folder-aciton.ts

@@ -3,15 +3,13 @@
 import { auth } from "@/auth";
 import { headers } from "next/headers";
 import { ValidateError } from "@/lib/errors";
-import { ActionInputCreatePair, ActionInputUpdatePairById, ActionOutputGetFoldersWithTotalPairsByUserId, validateActionInputCreatePair, validateActionInputUpdatePairById } from "./folder-action-dto";
+import { ActionInputCreatePair, ActionInputUpdatePairById, ActionOutputGetFoldersWithTotalPairsByUserId, ActionOutputGetPublicFolders, ActionOutputSetFolderVisibility, ActionOutputToggleFavorite, ActionOutputCheckFavorite, validateActionInputCreatePair, validateActionInputUpdatePairById } from "./folder-action-dto";
-import { repoCreateFolder, repoCreatePair, repoDeleteFolderById, repoDeletePairById, repoGetFolderIdByPairId, repoGetFoldersByUserId, repoGetFoldersWithTotalPairsByUserId, repoGetPairsByFolderId, repoGetUserIdByFolderId, repoRenameFolderById, repoUpdatePairById } from "./folder-repository";
+import { repoCreateFolder, repoCreatePair, repoDeleteFolderById, repoDeletePairById, repoGetFolderIdByPairId, repoGetFolderVisibility, repoGetFoldersByUserId, repoGetFoldersWithTotalPairsByUserId, repoGetPairsByFolderId, repoGetPublicFolders, repoGetUserIdByFolderId, repoRenameFolderById, repoSearchPublicFolders, repoUpdateFolderVisibility, repoUpdatePairById, repoToggleFavorite, repoCheckFavorite } from "./folder-repository";
 import { validate } from "@/utils/validate";
 import z from "zod";
 import { LENGTH_MAX_FOLDER_NAME, LENGTH_MIN_FOLDER_NAME } from "@/shared/constant";
+import { Visibility } from "../../../generated/prisma/enums";
 
-/**
- * Helper function to check if the current user is the owner of a folder
- */
 async function checkFolderOwnership(folderId: number): Promise<boolean> {
   const session = await auth.api.getSession({ headers: await headers() });
   if (!session?.user?.id) return false;
@@ -20,9 +18,6 @@ async function checkFolderOwnership(folderId: number): Promise<boolean> {
   return folderOwnerId === session.user.id;
 }
 
-/**
- * Helper function to check if the current user is the owner of a pair's folder
- */
 async function checkPairOwnership(pairId: number): Promise<boolean> {
   const session = await auth.api.getSession({ headers: await headers() });
   if (!session?.user?.id) return false;
@@ -52,7 +47,6 @@ export async function actionGetPairsByFolderId(folderId: number) {
 
 export async function actionUpdatePairById(id: number, dto: ActionInputUpdatePairById) {
     try {
-        // Check ownership
         const isOwner = await checkPairOwnership(id);
         if (!isOwner) {
             return {
@@ -92,9 +86,24 @@ export async function actionGetUserIdByFolderId(folderId: number) {
     }
 }
 
+export async function actionGetFolderVisibility(folderId: number) {
+    try {
+        return {
+            success: true,
+            message: 'success',
+            data: await repoGetFolderVisibility(folderId)
+        };
+    } catch (e) {
+        console.log(e);
+        return {
+            success: false,
+            message: 'Unknown error occured.'
+        };
+    }
+}
+
 export async function actionDeleteFolderById(folderId: number) {
     try {
-        // Check ownership
         const isOwner = await checkFolderOwnership(folderId);
         if (!isOwner) {
             return {
@@ -119,7 +128,6 @@ export async function actionDeleteFolderById(folderId: number) {
 
 export async function actionDeletePairById(id: number) {
     try {
-        // Check ownership
         const isOwner = await checkPairOwnership(id);
         if (!isOwner) {
             return {
@@ -176,7 +184,6 @@ export async function actionGetFoldersByUserId(userId: string) {
 
 export async function actionCreatePair(dto: ActionInputCreatePair) {
     try {
-        // Check ownership
         const isOwner = await checkFolderOwnership(dto.folderId);
         if (!isOwner) {
             return {
@@ -238,7 +245,6 @@ export async function actionCreateFolder(userId: string, folderName: string) {
 
 export async function actionRenameFolderById(id: number, newName: string) {
     try {
-        // Check ownership
         const isOwner = await checkFolderOwnership(id);
         if (!isOwner) {
             return {
@@ -272,3 +278,150 @@ export async function actionRenameFolderById(id: number, newName: string) {
         };
     }
 }
+
+export async function actionSetFolderVisibility(
+    folderId: number,
+    visibility: "PRIVATE" | "PUBLIC",
+): Promise<ActionOutputSetFolderVisibility> {
+    try {
+        const isOwner = await checkFolderOwnership(folderId);
+        if (!isOwner) {
+            return {
+                success: false,
+                message: 'You do not have permission to change this folder visibility.',
+            };
+        }
+
+        await repoUpdateFolderVisibility({
+            folderId,
+            visibility: visibility as Visibility,
+        });
+        return {
+            success: true,
+            message: 'success',
+        };
+    } catch (e) {
+        console.log(e);
+        return {
+            success: false,
+            message: 'Unknown error occured.',
+        };
+    }
+}
+
+export async function actionGetPublicFolders(): Promise<ActionOutputGetPublicFolders> {
+    try {
+        const data = await repoGetPublicFolders({});
+        return {
+            success: true,
+            message: 'success',
+            data: data.map((folder) => ({
+                ...folder,
+                visibility: folder.visibility as "PRIVATE" | "PUBLIC",
+            })),
+        };
+    } catch (e) {
+        console.log(e);
+        return {
+            success: false,
+            message: 'Unknown error occured.',
+        };
+    }
+}
+
+export async function actionSearchPublicFolders(query: string): Promise<ActionOutputGetPublicFolders> {
+    try {
+        const data = await repoSearchPublicFolders({ query, limit: 50 });
+        return {
+            success: true,
+            message: 'success',
+            data: data.map((folder) => ({
+                ...folder,
+                visibility: folder.visibility as "PRIVATE" | "PUBLIC",
+            })),
+        };
+    } catch (e) {
+        console.log(e);
+        return {
+            success: false,
+            message: 'Unknown error occured.',
+        };
+    }
+}
+
+export async function actionToggleFavorite(
+    folderId: number,
+): Promise<ActionOutputToggleFavorite> {
+    try {
+        const session = await auth.api.getSession({ headers: await headers() });
+        if (!session?.user?.id) {
+            return {
+                success: false,
+                message: 'Unauthorized',
+            };
+        }
+
+        const isFavorited = await repoToggleFavorite({
+            folderId,
+            userId: session.user.id,
+        });
+
+        const { favoriteCount } = await repoCheckFavorite({
+            folderId,
+            userId: session.user.id,
+        });
+
+        return {
+            success: true,
+            message: 'success',
+            data: {
+                isFavorited,
+                favoriteCount,
+            },
+        };
+    } catch (e) {
+        console.log(e);
+        return {
+            success: false,
+            message: 'Unknown error occured.',
+        };
+    }
+}
+
+export async function actionCheckFavorite(
+    folderId: number,
+): Promise<ActionOutputCheckFavorite> {
+    try {
+        const session = await auth.api.getSession({ headers: await headers() });
+        if (!session?.user?.id) {
+            return {
+                success: true,
+                message: 'success',
+                data: {
+                    isFavorited: false,
+                    favoriteCount: 0,
+                },
+            };
+        }
+
+        const { isFavorited, favoriteCount } = await repoCheckFavorite({
+            folderId,
+            userId: session.user.id,
+        });
+
+        return {
+            success: true,
+            message: 'success',
+            data: {
+                isFavorited,
+                favoriteCount,
+            },
+        };
+    } catch (e) {
+        console.log(e);
+        return {
+            success: false,
+            message: 'Unknown error occured.',
+        };
+    }
+}

src/modules/folder/folder-action-dto.ts

@@ -32,3 +32,55 @@ export type ActionOutputGetFoldersWithTotalPairsByUserId = {
     success: boolean,
     data?: TSharedFolderWithTotalPairs[];
 };
+
+export const schemaActionInputSetFolderVisibility = z.object({
+    folderId: z.number().int().positive(),
+    visibility: z.enum(["PRIVATE", "PUBLIC"]),
+});
+export type ActionInputSetFolderVisibility = z.infer<typeof schemaActionInputSetFolderVisibility>;
+
+export const schemaActionInputSearchPublicFolders = z.object({
+    query: z.string().min(1).max(100),
+});
+export type ActionInputSearchPublicFolders = z.infer<typeof schemaActionInputSearchPublicFolders>;
+
+export type ActionOutputPublicFolder = {
+    id: number;
+    name: string;
+    visibility: "PRIVATE" | "PUBLIC";
+    createdAt: Date;
+    userId: string;
+    userName: string | null;
+    userUsername: string | null;
+    totalPairs: number;
+    favoriteCount: number;
+};
+
+export type ActionOutputGetPublicFolders = {
+    message: string;
+    success: boolean;
+    data?: ActionOutputPublicFolder[];
+};
+
+export type ActionOutputSetFolderVisibility = {
+    message: string;
+    success: boolean;
+};
+
+export type ActionOutputToggleFavorite = {
+    message: string;
+    success: boolean;
+    data?: {
+        isFavorited: boolean;
+        favoriteCount: number;
+    };
+};
+
+export type ActionOutputCheckFavorite = {
+    message: string;
+    success: boolean;
+    data?: {
+        isFavorited: boolean;
+        favoriteCount: number;
+    };
+};

src/modules/folder/folder-repository-dto.ts

@@ -1,3 +1,5 @@
+import { Visibility } from "../../../generated/prisma/enums";
+
 export interface RepoInputCreateFolder {
   name: string;
   userId: string;
@@ -21,3 +23,51 @@ export interface RepoInputUpdatePair {
   ipa1?: string;
   ipa2?: string;
 }
+
+export interface RepoInputUpdateFolderVisibility {
+  folderId: number;
+  visibility: Visibility;
+}
+
+export interface RepoInputSearchPublicFolders {
+  query: string;
+  limit?: number;
+}
+
+export interface RepoInputGetPublicFolders {
+  limit?: number;
+  offset?: number;
+  orderBy?: "createdAt" | "name";
+}
+
+export type RepoOutputPublicFolder = {
+  id: number;
+  name: string;
+  visibility: Visibility;
+  createdAt: Date;
+  userId: string;
+  userName: string | null;
+  userUsername: string | null;
+  totalPairs: number;
+  favoriteCount: number;
+};
+
+export type RepoOutputFolderVisibility = {
+  visibility: Visibility;
+  userId: string;
+};
+
+export interface RepoInputToggleFavorite {
+  folderId: number;
+  userId: string;
+}
+
+export interface RepoInputCheckFavorite {
+  folderId: number;
+  userId: string;
+}
+
+export type RepoOutputFavoriteStatus = {
+  isFavorited: boolean;
+  favoriteCount: number;
+};

src/modules/folder/folder-repository.ts

@@ -1,5 +1,18 @@
 import { prisma } from "@/lib/db";
-import { RepoInputCreateFolder, RepoInputCreatePair, RepoInputUpdatePair } from "./folder-repository-dto";
+import {
+  RepoInputCreateFolder,
+  RepoInputCreatePair,
+  RepoInputUpdatePair,
+  RepoInputUpdateFolderVisibility,
+  RepoInputSearchPublicFolders,
+  RepoInputGetPublicFolders,
+  RepoOutputPublicFolder,
+  RepoOutputFolderVisibility,
+  RepoInputToggleFavorite,
+  RepoInputCheckFavorite,
+  RepoOutputFavoriteStatus,
+} from "./folder-repository-dto";
+import { Visibility } from "../../../generated/prisma/enums";
 
 export async function repoCreatePair(data: RepoInputCreatePair) {
     return (await prisma.pair.create({
@@ -63,7 +76,8 @@ export async function repoGetFoldersByUserId(userId: string) {
     return {
       id: v.id,
       name: v.name,
-      userId: v.userId
+      userId: v.userId,
+      visibility: v.visibility,
     };
   });
 }
@@ -95,6 +109,7 @@ export async function repoGetFoldersWithTotalPairsByUserId(userId: string) {
     id: folder.id,
     name: folder.name,
     userId: folder.userId,
+    visibility: folder.visibility,
     total: folder._count?.pairs ?? 0,
     createdAt: folder.createdAt,
   }));
@@ -134,3 +149,126 @@ export async function repoGetFolderIdByPairId(pairId: number) {
   });
   return pair?.folderId;
 }
+
+export async function repoUpdateFolderVisibility(
+  input: RepoInputUpdateFolderVisibility,
+): Promise<void> {
+  await prisma.folder.update({
+    where: { id: input.folderId },
+    data: { visibility: input.visibility },
+  });
+}
+
+export async function repoGetFolderVisibility(
+  folderId: number,
+): Promise<RepoOutputFolderVisibility | null> {
+  const folder = await prisma.folder.findUnique({
+    where: { id: folderId },
+    select: { visibility: true, userId: true },
+  });
+  return folder;
+}
+
+export async function repoGetPublicFolders(
+  input: RepoInputGetPublicFolders = {},
+): Promise<RepoOutputPublicFolder[]> {
+  const { limit = 50, offset = 0, orderBy = "createdAt" } = input;
+
+  const folders = await prisma.folder.findMany({
+    where: { visibility: Visibility.PUBLIC },
+    include: {
+      _count: { select: { pairs: true, favorites: true } },
+      user: { select: { name: true, username: true } },
+    },
+    orderBy: { [orderBy]: "desc" },
+    take: limit,
+    skip: offset,
+  });
+  return folders.map((folder) => ({
+    id: folder.id,
+    name: folder.name,
+    visibility: folder.visibility,
+    createdAt: folder.createdAt,
+    userId: folder.userId,
+    userName: folder.user.name,
+    userUsername: folder.user.username,
+    totalPairs: folder._count.pairs,
+    favoriteCount: folder._count.favorites,
+  }));
+}
+
+export async function repoSearchPublicFolders(
+  input: RepoInputSearchPublicFolders,
+): Promise<RepoOutputPublicFolder[]> {
+  const { query, limit = 50 } = input;
+  const folders = await prisma.folder.findMany({
+    where: {
+      visibility: Visibility.PUBLIC,
+      name: { contains: query, mode: "insensitive" },
+    },
+    include: {
+      _count: { select: { pairs: true, favorites: true } },
+      user: { select: { name: true, username: true } },
+    },
+    orderBy: { createdAt: "desc" },
+    take: limit,
+  });
+  return folders.map((folder) => ({
+    id: folder.id,
+    name: folder.name,
+    visibility: folder.visibility,
+    createdAt: folder.createdAt,
+    userId: folder.userId,
+    userName: folder.user.name,
+    userUsername: folder.user.username,
+    totalPairs: folder._count.pairs,
+    favoriteCount: folder._count.favorites,
+  }));
+}
+
+export async function repoToggleFavorite(
+  input: RepoInputToggleFavorite,
+): Promise<boolean> {
+  const existing = await prisma.folderFavorite.findUnique({
+    where: {
+      userId_folderId: {
+        userId: input.userId,
+        folderId: input.folderId,
+      },
+    },
+  });
+  if (existing) {
+    await prisma.folderFavorite.delete({
+      where: { id: existing.id },
+    });
+    return false;
+  } else {
+    await prisma.folderFavorite.create({
+      data: {
+        userId: input.userId,
+        folderId: input.folderId,
+      },
+    });
+    return true;
+  }
+}
+
+export async function repoCheckFavorite(
+  input: RepoInputCheckFavorite,
+): Promise<RepoOutputFavoriteStatus> {
+  const favorite = await prisma.folderFavorite.findUnique({
+    where: {
+      userId_folderId: {
+        userId: input.userId,
+        folderId: input.folderId,
+      },
+    },
+  });
+  const count = await prisma.folderFavorite.count({
+    where: { folderId: input.folderId },
+  });
+  return {
+    isFavorited: !!favorite,
+    favoriteCount: count,
+  };
+}

src/shared/folder-type.ts

@@ -2,12 +2,14 @@ export type TSharedFolder = {
     id: number,
     name: string,
     userId: string;
+    visibility: "PRIVATE" | "PUBLIC";
 };
 
 export type TSharedFolderWithTotalPairs = {
     id: number,
     name: string,
     userId: string,
+    visibility: "PRIVATE" | "PUBLIC";
     total: number;
 };
 
@@ -21,3 +23,15 @@ export type TSharedPair = {
     id: number;
     folderId: number;
 };
+
+export type TPublicFolder = {
+    id: number;
+    name: string;
+    visibility: "PRIVATE" | "PUBLIC";
+    createdAt: Date;
+    userId: string;
+    userName: string | null;
+    userUsername: string | null;
+    totalPairs: number;
+    favoriteCount: number;
+};