practicekea_backend/microservices/institute/V1/Controllers/NotificationController.cs

using System;
using System.Collections.Generic;
using System.Security.Claims;
using OnlineAssessment.Common;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using OnlineAssessment.Data.EFCore;
using OnlineAssessment.Domain.Models;
using OnlineAssessment.Domain.ViewModels;

namespace OnlineAssessment.V1.Controllers
{
    [Authorize]
    [ApiVersion("1.0")]
    [Route("v{version:apiVersion}/[controller]")]
    public class NotificationController : BaseController<UserGroups, EFCoreUserGroupRepository>
    {
        EFCoreUserGroupRepository _repository;
        string responseMessage = string.Empty;
        public NotificationController(EFCoreUserGroupRepository repository) : base(repository)
        {
            _repository = repository;
        }


        
        /// <summary>
        /// Attch users to the user group
        /// </summary>
        /// <returns></returns>
        [HttpPost("{user_group_id}/Message")]
        [Authorize(Roles = "Admin")]
        public async System.Threading.Tasks.Task<IActionResult> Message()
        {
            IActionResult returnResponse;

            // The topic name can be optionally prefixed with "/topics/".
            var topic = "practiceKea";

            // See documentation on defining a message payload.
            var message = new FirebaseAdmin.Messaging.Message()
            {
                Data = new Dictionary<string, string>()
                {
                    { "score", "850" },
                    { "time", "2:45" },
                },
                Topic = topic,

                Notification = new FirebaseAdmin.Messaging.Notification
                {
                    Title = "Message Title",
                    Body = "Message Body"
                },
            };

            // Send a message to the devices subscribed to the provided topic.
            string response = await FirebaseAdmin.Messaging.FirebaseMessaging.DefaultInstance.SendAsync(message);
            // Response is a message ID string.
            Console.WriteLine("Successfully sent message: " + response);

            returnResponse = Ok(ReturnResponse.GetSuccessStatus(response));

            return returnResponse;
        }
        
    }
}