Plugins/Nop.Plugin.DiscountRules.PurchasedAllProducts/PurchasedAllProductsDiscountRequirementRule.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using Nop.Core;
using Nop.Core.Domain.Orders;
using Nop.Core.Plugins;
using Nop.Services.Discounts;
using Nop.Services.Localization;
using Nop.Services.Orders;

namespace Nop.Plugin.DiscountRules.PurchasedAllProducts
{
    public partial class PurchasedAllProductsDiscountRequirementRule : BasePlugin, IDiscountRequirementRule
    {
        private readonly IOrderService _orderService;

        public PurchasedAllProductsDiscountRequirementRule(IOrderService orderService)
        {
            this._orderService = orderService;
        }

        /// <summary>
        /// Check discount requirement
        /// </summary>
        /// <param name="request">Object that contains all information required to check the requirement (Current customer, discount, etc)</param>
        /// <returns>true - requirement is met; otherwise, false</returns>
        public bool CheckRequirement(CheckDiscountRequirementRequest request)
        {
            if (request == null)
                throw new ArgumentNullException("request");

            if (request.DiscountRequirement == null)
                throw new NopException("Discount requirement is not set");

            if (String.IsNullOrWhiteSpace(request.DiscountRequirement.RestrictedProductVariantIds))
                return true;

            if (request.Customer == null)
                return false;

            var restrictedProductVariantIds = new List<int>();
            try
            {
                restrictedProductVariantIds = request.DiscountRequirement.RestrictedProductVariantIds
                    .Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries)
                    .Select(x => Convert.ToInt32(x))
                    .ToList();
            }
            catch
            {
                //error parsing
                return false;
            }
            if (restrictedProductVariantIds.Count == 0)
                return false;

            //purchased products
            var purchasedProductVariants = _orderService.GetAllOrderProductVariants(0,
                request.Customer.Id, null, null, OrderStatus.Complete, null, null);