All files / src/components/features/notifications/NotificationPanel index.tsx

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'use client';
 
import { useEffect, useRef, useCallback } from 'react';
import Link from 'next/link';
import { Icon } from '@/components/ui/icons';
import { cn } from '@/lib/core';
import { NotificationItem } from '../NotificationItem';
import type { NotificationPayload } from '@/lib/notifications/types';
 
export interface NotificationPanelProps {
  /** Whether the panel is visible */
  isOpen: boolean;
  /** Callback to close the panel */
  onClose: () => void;
  /** List of notifications to display */
  notifications: NotificationPayload[];
  /** Number of unread notifications */
  unreadCount: number;
  /** Whether notifications are loading */
  isLoading?: boolean;
  /** Callback when a notification is marked as read */
  onMarkAsRead?: (id: string) => void;
  /** Callback to mark all as read */
  onMarkAllAsRead?: () => void;
  /** Callback when a notification is clicked */
  onNotificationClick?: (notification: NotificationPayload) => void;
  /** Optional class name */
  className?: string;
}
 
/**
 * NotificationPanel - Dropdown panel displaying user notifications
 *
 * Shows a list of notifications with actions to mark as read,
 * mark all as read, and navigate to full notifications page.
 */
export function NotificationPanel({
  isOpen,
  onClose,
  notifications,
  unreadCount,
  isLoading = false,
  onMarkAsRead,
  onMarkAllAsRead,
  onNotificationClick,
  className,
}: NotificationPanelProps) {
  const panelRef = useRef<HTMLDivElement>(null);

  // Close on click outside
  useEffect(() => {
    if (!isOpen) return;

    function handleClickOutside(event: MouseEvent) {
      if (panelRef.current && !panelRef.current.contains(event.target as Node)) {
        onClose();
      }
    }

    // Delay adding listener to prevent immediate close
    const timeoutId = setTimeout(() => {
      document.addEventListener('mousedown', handleClickOutside);
    }, 0);

    return () => {
      clearTimeout(timeoutId);
      document.removeEventListener('mousedown', handleClickOutside);
    };
  }, [isOpen, onClose]);

  // Close on Escape key
  useEffect(() => {
    if (!isOpen) return;

    function handleEscape(event: KeyboardEvent) {
      if (event.key === 'Escape') {
        onClose();
      }
    }

    document.addEventListener('keydown', handleEscape);
    return () => document.removeEventListener('keydown', handleEscape);
  }, [isOpen, onClose]);

  const handleMarkAsRead = useCallback(
    (id: string) => {
      onMarkAsRead?.(id);
    },
    [onMarkAsRead]
  );

  const handleNotificationClick = useCallback(
    (notification: NotificationPayload) => {
      onNotificationClick?.(notification);
    },
    [onNotificationClick]
  );

  if (!isOpen) return null;

  return (
    <div
      ref={panelRef}
      className={cn(
        'absolute right-0 top-full mt-2 w-80 sm:w-96 bg-white dark:bg-gray-900 rounded-lg shadow-lg border border-gray-200 dark:border-gray-700 z-50 overflow-hidden',
        className
      )}
      role="dialog"
      aria-label="Notifications"
    >
      {/* Header */}
      <div className="flex items-center justify-between px-4 py-3 border-b border-gray-200 dark:border-gray-700">
        <div className="flex items-center gap-2">
          <h2 className="font-semibold text-gray-900 dark:text-white">
            Notifications
          </h2>
          {unreadCount > 0 && (
            <span className="px-2 py-0.5 text-xs font-medium bg-blue-100 text-blue-800 dark:bg-blue-900/50 dark:text-blue-300 rounded-full">
              {unreadCount}
            </span>
          )}
        </div>
        <div className="flex items-center gap-2">
          {unreadCount > 0 && (
            <button
              type="button"
              onClick={onMarkAllAsRead}
              className="text-xs text-blue-600 hover:text-blue-700 dark:text-blue-400 dark:hover:text-blue-300 font-medium"
            >
              Mark all read
            </button>
          )}
          <button
            type="button"
            onClick={onClose}
            className="p-1 text-gray-400 hover:text-gray-600 dark:hover:text-gray-300 rounded"
            aria-label="Close notifications"
          >
            <Icon name="x" className="w-4 h-4" />
          </button>
        </div>
      </div>

      {/* Content */}
      <div className="max-h-96 overflow-y-auto">
        {isLoading ? (
          <div className="flex items-center justify-center py-8">
            <Icon name="spinner" className="w-6 h-6 animate-spin text-gray-400" />
          </div>
        ) : notifications.length === 0 ? (
          <div className="flex flex-col items-center justify-center py-8 px-4 text-center">
            <Icon
              name="bell"
              className="w-12 h-12 text-gray-300 dark:text-gray-600 mb-3"
            />
            <p className="text-sm text-gray-500 dark:text-gray-400">
              No notifications yet
            </p>
            <p className="text-xs text-gray-400 dark:text-gray-500 mt-1">
              We&apos;ll notify you when something important happens
            </p>
          </div>
        ) : (
          <div className="divide-y divide-gray-100 dark:divide-gray-800">
            {notifications.map((notification) => (
              <NotificationItem
                key={notification.id}
                notification={notification}
                onMarkAsRead={() => handleMarkAsRead(notification.id)}
                onClick={() => handleNotificationClick(notification)}
              />
            ))}
          </div>
        )}
      </div>

      {/* Footer */}
      {notifications.length > 0 && (
        <div className="border-t border-gray-200 dark:border-gray-700 p-2">
          <Link
            href="/my-account"
            className="block w-full text-center py-2 text-sm text-blue-600 hover:text-blue-700 dark:text-blue-400 dark:hover:text-blue-300 font-medium hover:bg-gray-50 dark:hover:bg-gray-800 rounded transition-colors"
            onClick={onClose}
          >
            View all notifications
          </Link>
        </div>
      )}
    </div>
  );
}
 
export default NotificationPanel;