Keep sub-account edits on the owner's accounts and change passwords on the account (2.4.x)

src/Business/Grand.Business.Core/Interfaces/Customers/ICustomerManagerService.cs

@@ -39,4 +39,14 @@ public interface ICustomerManagerService
     /// <param name="request">Request</param>
     /// <param name="storeId">Store identifier - used to resolve the customer when per-store customer identity is enabled</param>
     Task ChangePassword(ChangePasswordRequest request, string storeId = "");
+
+    /// <summary>
+    ///     Change password of this customer, without resolving the account by e-mail
+    /// </summary>
+    /// <param name="customer">Customer</param>
+    /// <param name="passwordFormat">Password format</param>
+    /// <param name="newPassword">New password</param>
+    /// <remarks>The default body keeps implementations built for an earlier 2.4 release loading without a rebuild</remarks>
+    Task ChangePassword(Customer customer, PasswordFormat passwordFormat, string newPassword) =>
+        ChangePassword(new ChangePasswordRequest(customer.Email, passwordFormat, newPassword), customer.StoreId);
 }

src/Business/Grand.Business.Core/Interfaces/Customers/ICustomerService.cs

@@ -190,6 +190,13 @@ Task UpdateCustomerField<T>(string customerId,
     /// <param name="customer">Customer</param>
     Task UpdateActive(Customer customer);
 
+    /// <summary>
+    ///     Updates the password fields of the customer, and nothing else
+    /// </summary>
+    /// <param name="customer">Customer</param>
+    /// <remarks>The default body keeps implementations built for an earlier 2.4 release loading without a rebuild</remarks>
+    Task UpdateCustomerPassword(Customer customer) => UpdateCustomer(customer);
+
     /// <summary>
     ///     Update the customer
     /// </summary>

src/Business/Grand.Business.Customers/Services/CustomerManagerService.cs

@@ -173,33 +173,46 @@ public virtual async Task ChangePassword(ChangePasswordRequest request, string s
         ArgumentNullException.ThrowIfNull(request);
 
         var customer = await _customerService.GetCustomerByEmail(request.Email, storeId);
+
+        await ChangePassword(customer, request.PasswordFormat, request.NewPassword);
+    }
+
+    /// <summary>
+    ///     Change password of this customer, without resolving the account by e-mail
+    /// </summary>
+    /// <param name="customer">Customer</param>
+    /// <param name="passwordFormat">Password format</param>
+    /// <param name="newPassword">New password</param>
+    public virtual async Task ChangePassword(Customer customer, PasswordFormat passwordFormat, string newPassword)
+    {
         ArgumentNullException.ThrowIfNull(customer);
 
-        switch (request.PasswordFormat)
+        switch (passwordFormat)
         {
             case PasswordFormat.Clear:
             {
-                customer.Password = request.NewPassword;
+                customer.Password = newPassword;
             }
                 break;
             case PasswordFormat.Encrypted:
             {
                 customer.PasswordSalt = CommonHelper.GenerateRandomDigitCode(24);
-                customer.Password = _encryptionService.EncryptText(request.NewPassword, customer.PasswordSalt);
+                customer.Password = _encryptionService.EncryptText(newPassword, customer.PasswordSalt);
             }
                 break;
             case PasswordFormat.Hashed:
             {
                 //modern self-describing PBKDF2 hash - salt and parameters are embedded in the value itself
                 customer.PasswordSalt = string.Empty;
-                customer.Password = _encryptionService.HashPassword(request.NewPassword);
+                customer.Password = _encryptionService.HashPassword(newPassword);
             }
                 break;
         }
 
         customer.PasswordChangeDateUtc = DateTime.UtcNow;
-        customer.PasswordFormatId = request.PasswordFormat;
-        await _customerService.UpdateCustomer(customer);
+        customer.PasswordFormatId = passwordFormat;
+        //only the password fields: the caller's copy may be older than the account
+        await _customerService.UpdateCustomerPassword(customer);
         //insert password history
         await _customerHistoryPasswordService.InsertCustomerPassword(customer);
 

src/Business/Grand.Business.Customers/Services/CustomerService.cs

@@ -551,6 +551,26 @@ public virtual async Task UpdateCustomerInAdminPanel(Customer customer)
     }
 
 
+    public virtual async Task UpdateCustomerPassword(Customer customer)
+    {
+        ArgumentNullException.ThrowIfNull(customer);
+
+        if (customer.IsSystemAccount)
+            throw new GrandException(
+                $"System customer account ({(string.IsNullOrEmpty(customer.SystemName) ? customer.Email : customer.SystemName)}) could not be updated");
+
+        var update = UpdateBuilder<Customer>.Create()
+            .Set(x => x.Password, customer.Password)
+            .Set(x => x.PasswordSalt, customer.PasswordSalt)
+            .Set(x => x.PasswordFormatId, customer.PasswordFormatId)
+            .Set(x => x.PasswordChangeDateUtc, customer.PasswordChangeDateUtc);
+
+        await _customerRepository.UpdateOneAsync(x => x.Id == customer.Id, update);
+
+        //event notification
+        await _mediator.EntityUpdated(customer);
+    }
+
     public virtual async Task UpdateActive(Customer customer)
     {
         ArgumentNullException.ThrowIfNull(customer);

src/Tests/Grand.Business.Customers.Tests/Services/CustomerManagerServiceTests.cs

@@ -100,6 +100,74 @@ public async Task ChangePassword_PassesStoreIdToLookup()
         _customerServiceMock.Verify(c => c.GetCustomerByEmail("admin@admin.com", "store-1"), Times.Once);
     }
 
+    [TestMethod]
+    public async Task ChangePassword_ForCustomer_ChangesThatCustomerWithoutLookup()
+    {
+        //Arrange
+        var customer = new Customer { Id = "c1", Email = "a@x.com", PasswordFormatId = PasswordFormat.Clear, Password = "123456" };
+        //Act
+        await _customerManagerService.ChangePassword(customer, PasswordFormat.Clear, "zxcvbn");
+        //Assert
+        Assert.AreEqual("zxcvbn", customer.Password);
+        _customerServiceMock.Verify(c => c.UpdateCustomerPassword(customer), Times.Once);
+        //the whole-customer update would write back everything else the caller's copy holds
+        _customerServiceMock.Verify(c => c.UpdateCustomer(It.IsAny<Customer>()), Times.Never);
+        _customerServiceMock.Verify(c => c.GetCustomerByEmail(It.IsAny<string>(), It.IsAny<string>()), Times.Never);
+    }
+
+    [TestMethod]
+    public async Task ChangePassword_ImplementationBuiltForAnEarlierRelease_UsesItsExistingMethod()
+    {
+        ICustomerManagerService manager = new EarlierReleaseManager();
+
+        await manager.ChangePassword(new Customer { Email = "a@x.com", StoreId = "store-1" }, PasswordFormat.Hashed, "new");
+
+        var implementation = (EarlierReleaseManager)manager;
+        Assert.AreEqual("a@x.com", implementation.Request.Email);
+        Assert.AreEqual(PasswordFormat.Hashed, implementation.Request.PasswordFormat);
+        Assert.AreEqual("new", implementation.Request.NewPassword);
+        Assert.AreEqual("store-1", implementation.StoreId);
+    }
+
+    [TestMethod]
+    public void NewInterfaceMembers_HaveDefaultBodies_SoExistingImplementationsKeepLoading()
+    {
+        Assert.IsFalse(typeof(ICustomerService).GetMethod(nameof(ICustomerService.UpdateCustomerPassword))!.IsAbstract);
+        Assert.IsFalse(typeof(ICustomerManagerService).GetMethod(nameof(ICustomerManagerService.ChangePassword),
+            [typeof(Customer), typeof(PasswordFormat), typeof(string)])!.IsAbstract);
+    }
+
+    private sealed class EarlierReleaseManager : ICustomerManagerService
+    {
+        public ChangePasswordRequest Request { get; private set; }
+        public string StoreId { get; private set; }
+
+        public Task<CustomerLoginResults> LoginCustomer(string usernameOrEmail, string password, string storeId = "") =>
+            throw new NotImplementedException();
+
+        public Task RegisterCustomer(RegistrationRequest request) => throw new NotImplementedException();
+
+        public bool PasswordMatch(PasswordFormat passwordFormat, string oldPassword, string newPassword,
+            string passwordSalt) => throw new NotImplementedException();
+
+        public Task ChangePassword(ChangePasswordRequest request, string storeId = "")
+        {
+            Request = request;
+            StoreId = storeId;
+            return Task.CompletedTask;
+        }
+    }
+
+    [TestMethod]
+    public async Task ChangePassword_UnknownEmail_Throws()
+    {
+        //Arrange
+        var changepassword = new ChangePasswordRequest("nobody@x.com", PasswordFormat.Clear, "zxcvbn");
+        //Act + Assert
+        await Assert.ThrowsExactlyAsync<ArgumentNullException>(() =>
+            _customerManagerService.ChangePassword(changepassword, "store-1"));
+    }
+
     [TestMethod]
     public async Task ChangePasswordTest_Success()
     {

src/Tests/Grand.Business.Customers.Tests/Services/CustomerServiceTests.cs

@@ -9,6 +9,7 @@
 using Grand.Infrastructure.Configuration;
 using Grand.Infrastructure.Tests.Caching;
 using Grand.Mediator;
+using Grand.SharedKernel;
 using Microsoft.VisualStudio.TestTools.UnitTesting;
 using Moq;
 
@@ -474,6 +475,43 @@ public async Task UpdateCustomerinAdminPanelTest()
         Assert.AreEqual("store-1", updated.StoreId);
     }
 
+    [TestMethod]
+    public async Task UpdateCustomerPassword_WritesOnlyThePasswordFields()
+    {
+        //Arrange
+        await _repository.InsertAsync(new Customer {
+            Id = "c1", Email = "current@x.com", Username = "current", StoreId = "store-1", Active = false,
+            Password = "old", PasswordSalt = "salt", PasswordFormatId = PasswordFormat.Clear
+        });
+        //taken before the account changed, as a caller holds it during a request
+        var changedAt = new DateTime(2026, 11, 1, 12, 0, 0, DateTimeKind.Utc);
+        var snapshot = new Customer {
+            Id = "c1", Email = "stale@x.com", Username = "stale", StoreId = "store-2", Active = true,
+            Password = "new", PasswordSalt = "", PasswordFormatId = PasswordFormat.Hashed,
+            PasswordChangeDateUtc = changedAt
+        };
+        //Act
+        await _customerService.UpdateCustomerPassword(snapshot);
+        //Assert
+        var stored = _repository.Table.First(x => x.Id == "c1");
+        Assert.AreEqual("new", stored.Password);
+        Assert.AreEqual("", stored.PasswordSalt);
+        Assert.AreEqual(PasswordFormat.Hashed, stored.PasswordFormatId);
+        Assert.AreEqual(changedAt, stored.PasswordChangeDateUtc);
+        Assert.AreEqual("current@x.com", stored.Email);
+        Assert.AreEqual("current", stored.Username);
+        Assert.AreEqual("store-1", stored.StoreId);
+        Assert.IsFalse(stored.Active);
+    }
+
+    [TestMethod]
+    public async Task UpdateCustomerPassword_SystemAccount_Throws()
+    {
+        var customer = new Customer { Id = "c1", IsSystemAccount = true, SystemName = "system" };
+
+        await Assert.ThrowsExactlyAsync<GrandException>(() => _customerService.UpdateCustomerPassword(customer));
+    }
+
     [TestMethod]
     public async Task UpdateActiveTest()
     {