From 16c47f86925997d73a71e73b850d75ff59333b6f Mon Sep 17 00:00:00 2001
From: deploy <deploy@wageulwageul.com>
Date: Mon, 18 May 2026 01:11:48 +0000
Subject: [PATCH] feat: getDailyWords filter by difficulty param

---
 src/words/words.controller.ts |  4 ++--
 src/words/words.service.ts    | 20 +++++++++++++-------
 2 files changed, 15 insertions(+), 9 deletions(-)

diff --git a/src/words/words.controller.ts b/src/words/words.controller.ts
index 5cad236..2ba4517 100644
--- a/src/words/words.controller.ts
+++ b/src/words/words.controller.ts
@@ -15,8 +15,8 @@ export class WordsController {
   }
 
   @Get('daily')
-  getDaily() {
-    return this.service.getDailyWords();
+  getDaily(@Query('difficulty') difficulty?: string) {
+    return this.service.getDailyWords(difficulty);
   }
 
   @Get('quiz')
diff --git a/src/words/words.service.ts b/src/words/words.service.ts
index aa4e395..b215b7b 100644
--- a/src/words/words.service.ts
+++ b/src/words/words.service.ts
@@ -23,27 +23,33 @@ export class WordsService {
     return this.repo.find({ where: { id: In(ids) } });
   }
 
-  async getDailyWords(): Promise<Word[]> {
+  async getDailyWords(difficulty?: string): Promise<Word[]> {
     const today = new Date().toISOString().split('T')[0];
-    const existing = await this.repo.find({ where: { daily_date: today, is_daily: true } });
+    const dailyKey = difficulty ? `${today}_${difficulty}` : today;
+
+    const existingQuery = this.repo
+      .createQueryBuilder('w')
+      .where('w.daily_date = :dailyKey AND w.is_daily = true', { dailyKey });
+    const existing = await existingQuery.getMany();
     if (existing.length >= 10) return existing.slice(0, 10);
 
     await this.repo
       .createQueryBuilder()
       .update(Word)
       .set({ is_daily: false, daily_date: null })
-      .where('daily_date = :today AND is_daily = true', { today })
+      .where('daily_date = :dailyKey AND is_daily = true', { dailyKey })
       .execute();
 
-    const shuffled = await this.repo
+    const newWordsQuery = this.repo
       .createQueryBuilder('w')
       .orderBy('RAND()')
-      .limit(10)
-      .getMany();
+      .limit(10);
+    if (difficulty) newWordsQuery.where('w.difficulty = :difficulty', { difficulty });
 
+    const shuffled = await newWordsQuery.getMany();
     for (const w of shuffled) {
       w.is_daily = true;
-      w.daily_date = today;
+      w.daily_date = dailyKey;
     }
     return this.repo.save(shuffled);
   }