server/src/Core/Models/Api/Request/PushSendRequestModel.cs

using Bit.Core.Enums;
using System.ComponentModel.DataAnnotations;
using System.Collections.Generic;

namespace Bit.Core.Models.Api
{
    public class PushSendRequestModel : IValidatableObject
    {
        public string UserId { get; set; }
        public string OrganizationId { get; set; }
        public string DeviceId { get; set; }
        public string Identifier { get; set; }
        [Required]
        public PushType? Type { get; set; }
        [Required]
        public object Payload { get; set; }

        public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
        {
            if(string.IsNullOrWhiteSpace(UserId) && string.IsNullOrWhiteSpace(OrganizationId))
            {
                yield return new ValidationResult($"{nameof(UserId)} or {nameof(OrganizationId)} is required.");
            }
        }
    }
}