feat(api/games): add GET /types endpoint

controllers/gameController.js

@@ -1,5 +1,6 @@
 const { Game } = require('../models');
 const { cacheUtils } = require('../config/redis');
+const { sequelize } = require('../config/database');
 
 /**
  * Game Controller - Quản lý trò chơi giáo dục
@@ -393,6 +394,40 @@ class GameController {
     }
   }
 
+  /**
+   * Get all unique game types
+   */
+  async getGameTypes(req, res, next) {
+    try {
+      const cacheKey = 'games:types';
+      
+      const cached = await cacheUtils.get(cacheKey);
+      if (cached) {
+        return res.json({
+          success: true,
+          data: cached,
+          cached: true,
+        });
+      }
+
+      // Get distinct types
+      const types = await Game.aggregate('type', 'DISTINCT', { plain: false });
+
+      // Format response as array of objects
+      const result = types.map(t => ({ type: t.type }));
+
+      await cacheUtils.set(cacheKey, result, 3600);
+
+      res.json({
+        success: true,
+        data: result,
+        cached: false,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
   /**
    * Get game statistics
    */