zhibo/android-app/app/src/main/java/com/example/livestreaming/NotificationsAdapter.java

package com.example.livestreaming;

import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.DiffUtil;
import androidx.recyclerview.widget.ListAdapter;
import androidx.recyclerview.widget.RecyclerView;

import com.bumptech.glide.Glide;
import com.example.livestreaming.databinding.ItemNotificationBinding;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

public class NotificationsAdapter extends ListAdapter<NotificationItem, NotificationsAdapter.VH> {

    public interface OnNotificationClickListener {
        void onNotificationClick(NotificationItem item);
    }

    private final OnNotificationClickListener onNotificationClickListener;

    public NotificationsAdapter(OnNotificationClickListener onNotificationClickListener) {
        super(DIFF);
        this.onNotificationClickListener = onNotificationClickListener;
    }

    @NonNull
    @Override
    public VH onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        ItemNotificationBinding binding = ItemNotificationBinding.inflate(LayoutInflater.from(parent.getContext()), parent, false);
        return new VH(binding, onNotificationClickListener);
    }

    @Override
    public void onBindViewHolder(@NonNull VH holder, int position) {
        holder.bind(getItem(position));
    }

    static class VH extends RecyclerView.ViewHolder {

        private final ItemNotificationBinding binding;
        private final OnNotificationClickListener onNotificationClickListener;
        private final SimpleDateFormat timeFormat = new SimpleDateFormat("MM-dd HH:mm", Locale.getDefault());
        private final SimpleDateFormat todayFormat = new SimpleDateFormat("HH:mm", Locale.getDefault());

        VH(ItemNotificationBinding binding, OnNotificationClickListener onNotificationClickListener) {
            super(binding.getRoot());
            this.binding = binding;
            this.onNotificationClickListener = onNotificationClickListener;
        }

        void bind(NotificationItem item) {
            if (item == null) return;

            // 设置标题和内容
            binding.title.setText(item.getTitle() != null ? item.getTitle() : "");
            binding.content.setText(item.getContent() != null ? item.getContent() : "");

            // 设置时间
            Date timestamp = item.getTimestamp();
            if (timestamp != null) {
                String timeText = formatTime(timestamp);
                binding.timeText.setText(timeText);
            } else {
                binding.timeText.setText("");
            }

            // 设置未读标记
            if (!item.isRead()) {
                binding.unreadDot.setVisibility(View.VISIBLE);
            } else {
                binding.unreadDot.setVisibility(View.GONE);
            }

            // 加载头像
            loadAvatar(item);

            // 设置点击事件
            binding.getRoot().setOnClickListener(v -> {
                if (onNotificationClickListener != null) {
                    onNotificationClickListener.onNotificationClick(item);
                }
            });
        }

        private String formatTime(Date date) {
            if (date == null) return "";
            
            Date now = new Date();
            long diff = now.getTime() - date.getTime();
            
            // 如果是今天，只显示时间
            if (diff < 24 * 60 * 60 * 1000 && isToday(date, now)) {
                return todayFormat.format(date);
            }
            
            // 否则显示日期和时间
            return timeFormat.format(date);
        }

        private boolean isToday(Date date, Date now) {
            SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd", Locale.getDefault());
            return dateFormat.format(date).equals(dateFormat.format(now));
        }

        private void loadAvatar(NotificationItem item) {
            // TODO: 接入后端接口 - 从后端获取通知发送者的头像URL
            // 接口路径: GET /api/user/profile/{senderId}
            // 请求参数: senderId (路径参数，从NotificationItem中获取)
            // 返回数据格式: ApiResponse<{avatarUrl: string}>
            // 如果NotificationItem包含senderId，则调用此接口获取头像；否则使用默认图标
            if (binding.avatar == null) return;

            String avatarUrl = item.getAvatarUrl();
            if (!TextUtils.isEmpty(avatarUrl)) {
                Glide.with(binding.avatar)
                        .load(avatarUrl)
                        .circleCrop()
                        .placeholder(R.drawable.ic_account_circle_24)
                        .error(R.drawable.ic_account_circle_24)
                        .into(binding.avatar);
            } else {
                // 根据通知类型设置默认图标
                int iconRes = getIconForType(item.getType());
                Glide.with(binding.avatar)
                        .load(iconRes)
                        .circleCrop()
                        .into(binding.avatar);
            }
        }

        private int getIconForType(NotificationItem.Type type) {
            if (type == null) return R.drawable.ic_notifications_24;
            
            switch (type) {
                case SYSTEM:
                    return R.drawable.ic_notifications_24;
                case INTERACTION:
                    return R.drawable.ic_chat_24;
                case FOLLOW:
                    return R.drawable.ic_people_24;
                case MESSAGE:
                    return R.drawable.ic_chat_24;
                case LIVE:
                    return R.drawable.ic_voice_24;
                default:
                    return R.drawable.ic_notifications_24;
            }
        }
    }

    private static final DiffUtil.ItemCallback<NotificationItem> DIFF = new DiffUtil.ItemCallback<NotificationItem>() {
        @Override
        public boolean areItemsTheSame(@NonNull NotificationItem oldItem, @NonNull NotificationItem newItem) {
            String o = oldItem.getId();
            String n = newItem.getId();
            return o != null && o.equals(n);
        }

        @Override
        public boolean areContentsTheSame(@NonNull NotificationItem oldItem, @NonNull NotificationItem newItem) {
            return oldItem.equals(newItem) && oldItem.isRead() == newItem.isRead();
        }
    };
}