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CustomerValidator.cs

using FluentValidation;
using Nop.Core.Domain.Customers;
using Nop.Services.Customers;
using Nop.Services.Directory;
using Nop.Services.Localization;
using Nop.Web.Areas.Admin.Models.Customers;
using Nop.Web.Framework.Validators;

namespace Nop.Web.Areas.Admin.Validators.Customers;

public partial class CustomerValidator : BaseNopValidator
{
    public CustomerValidator(CustomerSettings customerSettings,
        ICustomerService customerService,
        ILocalizationService localizationService,
        IStateProvinceService stateProvinceService)
    {
        //ensure that valid email address is entered if Registered role is checked to avoid registered customers with empty email address
        RuleFor(x => x.Email)
            .NotEmpty()
            .IsEmailAddress()
            //.WithMessage("Valid Email is required for customer to be in 'Registered' role")
            .WithMessageAwait(localizationService.GetResourceAsync("Admin.Common.WrongEmail"))
            //only for registered users
            .WhenAwait(async x => await IsRegisteredCustomerRoleCheckedAsync(x, customerService));

        //form fields
        if (customerSettings.CountryEnabled && customerSettings.CountryRequired)
        {
            RuleFor(x => x.CountryId)
                .NotEqual(0)
                .WithMessageAwait(localizationService.GetResourceAsync("Account.Fields.Country.Required"))
                //only for registered users
                .WhenAwait(async x => await IsRegisteredCustomerRoleCheckedAsync(x, customerService));
        }
        if (customerSettings.CountryEnabled &&
            customerSettings.StateProvinceEnabled &&
            customerSettings.StateProvinceRequired)
        {
            RuleFor(x => x.StateProvinceId).MustAwait(async (x, context) =>
            {
                //does selected country have states?
                var hasStates = (await stateProvinceService.GetStateProvincesByCountryIdAsync(x.CountryId)).Any();
                if (hasStates)
                {
                    //if yes, then ensure that a state is selected
                    if (x.StateProvinceId == 0)
                        return false;
                }

                return true;
            }).WithMessageAwait(localizationService.GetResourceAsync("Account.Fields.StateProvince.Required"));
        }
        if (customerSettings.CompanyRequired && customerSettings.CompanyEnabled)
        {
            RuleFor(x => x.Company)
                .NotEmpty()
                .WithMessageAwait(localizationService.GetResourceAsync("Admin.Customers.Customers.Fields.Company.Required"))
                //only for registered users
                .WhenAwait(async x => await IsRegisteredCustomerRoleCheckedAsync(x, customerService));
        }
        if (customerSettings.StreetAddressRequired && customerSettings.StreetAddressEnabled)
        {
            RuleFor(x => x.StreetAddress)
                .NotEmpty()
                .WithMessageAwait(localizationService.GetResourceAsync("Admin.Customers.Customers.Fields.StreetAddress.Required"))
                //only for registered users
                .WhenAwait(async x => await IsRegisteredCustomerRoleCheckedAsync(x, customerService));
        }
        if (customerSettings.StreetAddress2Required && customerSettings.StreetAddress2Enabled)
        {
            RuleFor(x => x.StreetAddress2)
                .NotEmpty()
                .WithMessageAwait(localizationService.GetResourceAsync("Admin.Customers.Customers.Fields.StreetAddress2.Required"))
                //only for registered users
                .WhenAwait(async x => await IsRegisteredCustomerRoleCheckedAsync(x, customerService));
        }
        if (customerSettings.ZipPostalCodeRequired && customerSettings.ZipPostalCodeEnabled)
        {
            RuleFor(x => x.ZipPostalCode)
                .NotEmpty()
                .WithMessageAwait(localizationService.GetResourceAsync("Admin.Customers.Customers.Fields.ZipPostalCode.Required"))
                //only for registered users
                .WhenAwait(async x => await IsRegisteredCustomerRoleCheckedAsync(x, customerService));
        }
        if (customerSettings.CityRequired && customerSettings.CityEnabled)
        {
            RuleFor(x => x.City)
                .NotEmpty()
                .WithMessageAwait(localizationService.GetResourceAsync("Admin.Customers.Customers.Fields.City.Required"))
                //only for registered users
                .WhenAwait(async x => await IsRegisteredCustomerRoleCheckedAsync(x, customerService));
        }
        if (customerSettings.CountyRequired && customerSettings.CountyEnabled)
        {
            RuleFor(x => x.County)
                .NotEmpty()
                .WithMessageAwait(localizationService.GetResourceAsync("Admin.Customers.Customers.Fields.County.Required"))
                //only for registered users
                .WhenAwait(async x => await IsRegisteredCustomerRoleCheckedAsync(x, customerService));
        }
        if (customerSettings.PhoneRequired && customerSettings.PhoneEnabled)
        {
            RuleFor(x => x.Phone)
                .NotEmpty()
                .WithMessageAwait(localizationService.GetResourceAsync("Admin.Customers.Customers.Fields.Phone.Required"))
                //only for registered users
                .WhenAwait(async x => await IsRegisteredCustomerRoleCheckedAsync(x, customerService));
        }
        if (customerSettings.FaxRequired && customerSettings.FaxEnabled)
        {
            RuleFor(x => x.Fax)
                .NotEmpty()
                .WithMessageAwait(localizationService.GetResourceAsync("Admin.Customers.Customers.Fields.Fax.Required"))
                //only for registered users
                .WhenAwait(async x => await IsRegisteredCustomerRoleCheckedAsync(x, customerService));
        }

        SetDatabaseValidationRules();
    }

    protected virtual async Task IsRegisteredCustomerRoleCheckedAsync(CustomerModel model, ICustomerService customerService)
    {
        var allCustomerRoles = await customerService.GetAllCustomerRolesAsync(true);
        var newCustomerRoles = new List();
        foreach (var customerRole in allCustomerRoles)
            if (model.SelectedCustomerRoleIds.Contains(customerRole.Id))
                newCustomerRoles.Add(customerRole);

        var isInRegisteredRole = newCustomerRoles.FirstOrDefault(cr => cr.SystemName == NopCustomerDefaults.RegisteredRoleName) != null;
        return isInRegisteredRole;
    }
}