From 65ee2fe6c53e46dd26b41d1c2364b3809d28c464 Mon Sep 17 00:00:00 2001
From: minij02 <mjryu00211@gmail.com>
Date: Fri, 20 Mar 2026 17:14:31 +0900
Subject: [PATCH] Feat: add  field to prompt detail API for UX improvement

---
 src/prompts/repositories/prompt.repository.ts | 34 +++++++++++++++++--
 src/prompts/routes/prompt.route.ts            |  1 +
 2 files changed, 33 insertions(+), 2 deletions(-)

diff --git a/src/prompts/repositories/prompt.repository.ts b/src/prompts/repositories/prompt.repository.ts
index 284c0c5..62821d1 100644
--- a/src/prompts/repositories/prompt.repository.ts
+++ b/src/prompts/repositories/prompt.repository.ts
@@ -278,7 +278,7 @@ const promptSelect = Prisma.validator<Prisma.PromptSelect>()({
   },
 });
 
-export const getPromptDetailRepo = async (promptId: number) => {
+export const getPromptDetailRepo = async (promptId: number, userId?: number) => {
 
   await prisma.prompt.update({
     where: { prompt_id: promptId },
@@ -334,7 +334,37 @@ export const getPromptDetailRepo = async (promptId: number) => {
   // ✅ 통계 붙이기
   const [promptWithStats] = attachReviewStats([prompt], stats);
 
-  return promptWithStats;
+  let is_paid = false;
+
+  if (userId) {
+    if (prompt.user_id === userId) {
+      // 본인이 등록한 프롬프트 (무조건 열람 가능)
+      is_paid = true;
+    } else if (prompt.is_free) {
+      // 로그인한 상태 && 무료 프롬프트 (DB 조회 없이 열람 가능)
+      is_paid = true;
+    } else {
+      // 로그인한 상태 && 유료 프롬프트 (결제 성공 여부 검사)
+      const purchaseRecord = await prisma.purchase.findFirst({
+        where: {
+          user_id: userId,
+          prompt_id: promptId,
+          payment: {
+            status: 'Succeed',
+          },
+        },
+      });
+
+      if (purchaseRecord) {
+        is_paid = true;
+      }
+    }
+  }
+
+  return {
+    ...promptWithStats,
+    is_paid,
+  };
 };
 
 export const createPromptWriteRepo = async (
diff --git a/src/prompts/routes/prompt.route.ts b/src/prompts/routes/prompt.route.ts
index 8086341..7e91632 100644
--- a/src/prompts/routes/prompt.route.ts
+++ b/src/prompts/routes/prompt.route.ts
@@ -200,6 +200,7 @@ router.get("/", promptController.getAllPrompts);
  *                 usage_guide: "사용 가이드 2"
  *                 price: 1000
  *                 is_free: false
+ *                 is_paid: true
  *                 tags:
  *                   - tag_id: 2
  *                     name: "태그 2"