submanager/lib/widgets/skeleton_loading.dart

import 'package:flutter/material.dart';

class SkeletonLoading extends StatelessWidget {
  const SkeletonLoading({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        // 요약 카드 스켈레톤
        Card(
          margin: const EdgeInsets.all(16),
          child: Padding(
            padding: const EdgeInsets.all(16.0),
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Container(
                  width: 100,
                  height: 24,
                  color: Colors.grey[300],
                ),
                const SizedBox(height: 16),
                Row(
                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
                  children: [
                    _buildSkeletonColumn(),
                    _buildSkeletonColumn(),
                  ],
                ),
              ],
            ),
          ),
        ),
        // 구독 목록 스켈레톤
        Expanded(
          child: ListView.builder(
            itemCount: 5,
            itemBuilder: (context, index) {
              return Card(
                margin: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
                child: ListTile(
                  contentPadding: const EdgeInsets.all(16),
                  title: Container(
                    width: 200,
                    height: 24,
                    color: Colors.grey[300],
                  ),
                  subtitle: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      const SizedBox(height: 8),
                      Container(
                        width: 150,
                        height: 16,
                        color: Colors.grey[300],
                      ),
                      const SizedBox(height: 4),
                      Container(
                        width: 180,
                        height: 16,
                        color: Colors.grey[300],
                      ),
                    ],
                  ),
                ),
              );
            },
          ),
        ),
      ],
    );
  }

  Widget _buildSkeletonColumn() {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Container(
          width: 80,
          height: 16,
          color: Colors.grey[300],
        ),
        const SizedBox(height: 4),
        Container(
          width: 100,
          height: 24,
          color: Colors.grey[300],
        ),
      ],
    );
  }
}