negyedik gyakorlat + megoldasok

Backend/negyedik gyakorlat/src/application/user/queries/GetUserByIdQueryHandler.js

@@ -0,0 +1,35 @@
+/**
+ * Get User By ID Query Handler
+ * Handles retrieval of a specific user by ID
+ */
+class GetUserByIdQueryHandler {
+  constructor(prisma) {
+    this.prisma = prisma;
+  }
+
+  /**
+   * Execute get user by ID query
+   * @param {GetUserByIdQuery} query 
+   * @returns {Promise<Object>} User data without password
+   */
+  async handle(query) {
+    const { userId } = query;
+
+    if (!userId || isNaN(userId)) {
+      throw new Error('Valid user ID is required');
+    }
+
+    const user = await this.prisma.user.findUnique({
+      where: { id: parseInt(userId) }
+    });
+
+    if (!user) {
+      throw new Error('User not found');
+    }
+
+    const { password, ...userWithoutPassword } = user;
+    return userWithoutPassword;
+  }
+}
+
+module.exports = GetUserByIdQueryHandler;