Add GetRoleNames by user ids Method

modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IIdentityUserRepository.cs

@@ -143,4 +143,8 @@ public interface IIdentityUserRepository : IBasicRepository<IdentityUser, Guid>
         Guid? targetOrganizationId,
         CancellationToken cancellationToken = default
     );
+
+    Task<Dictionary<Guid, List<string>>> GetRoleNamesAsync(
+        IEnumerable<Guid> userIds,
+        CancellationToken cancellationToken = default);
 }

modules/identity/src/Volo.Abp.Identity.EntityFrameworkCore/Volo/Abp/Identity/EntityFrameworkCore/EfCoreIdentityUserRepository.cs

@@ -56,6 +56,27 @@ public class EfCoreIdentityUserRepository : EfCoreRepository<IIdentityDbContext,
         return await resultQuery.ToListAsync(GetCancellationToken(cancellationToken));
     }
 
+    public virtual async Task<Dictionary<Guid, List<string>>> GetRoleNamesAsync(
+        IEnumerable<Guid> userIds, 
+        CancellationToken cancellationToken = default)
+    {
+        var dbContext = await GetDbContextAsync();
+        var query = from userRole in dbContext.Set<IdentityUserRole>()
+            join role in dbContext.Roles on userRole.RoleId equals role.Id
+            where userIds.Contains(userRole.UserId)
+                select new
+                {
+                    userRole.UserId,
+                    role.Name
+                };
+        
+        var result = await query
+            .GroupBy(x => x.UserId)
+            .ToDictionaryAsync(x => x.Key, x => x.Select(r => r.Name).ToList(), cancellationToken: cancellationToken);
+
+        return result;
+    }
+
     public virtual async Task<List<string>> GetRoleNamesInOrganizationUnitAsync(
         Guid id,
         CancellationToken cancellationToken = default)

modules/identity/src/Volo.Abp.Identity.MongoDB/Volo/Abp/Identity/MongoDB/MongoIdentityUserRepository.cs

@@ -131,7 +131,7 @@ public class MongoIdentityUserRepository : MongoDbRepository<IAbpIdentityMongoDb
             .Where(u => u.Roles.Any(r => r.RoleId == role.Id))
             .ToListAsync(cancellationToken);
     }
-
+    
     public virtual async Task<List<IdentityUser>> GetListAsync(
         string sorting = null,
         int maxResultCount = int.MaxValue,
@@ -360,4 +360,29 @@ public class MongoIdentityUserRepository : MongoDbRepository<IAbpIdentityMongoDb
 
         await UpdateManyAsync(users, cancellationToken: cancellationToken);
     }
+
+    public virtual async Task<Dictionary<Guid, List<string>>> GetRoleNamesAsync(
+        IEnumerable<Guid> userIds, 
+        CancellationToken cancellationToken = default)
+    {
+        cancellationToken = GetCancellationToken(cancellationToken);
+        
+        var userAndRoleIds = (await GetMongoQueryableAsync<IdentityUser>(cancellationToken))
+            .Where(u => userIds.Contains(u.Id))
+            .SelectMany(u => u.Roles)
+            .Select(userRole => new 
+            {
+                userRole.UserId,
+                userRole.RoleId
+            }).GroupBy(x => x.UserId).ToDictionary(x => x.Key, x => x.Select(r => r.RoleId).ToList());
+
+        var roleIds = userAndRoleIds.SelectMany(x => x.Value);
+        var roles = await (await GetMongoQueryableAsync<IdentityRole>(cancellationToken)).Where(r => roleIds.Contains(r.Id)).Select(r => new 
+        {
+            r.Id,
+            r.Name
+        }).ToListAsync(cancellationToken);
+  
+        return userAndRoleIds.ToDictionary(x => x.Key, x => roles.Where(r => x.Value.Contains(r.Id)).Select(r => r.Name).ToList());
+    }
 }

modules/identity/test/Volo.Abp.Identity.TestBase/Volo/Abp/Identity/IdentityUserRepository_Tests.cs

@@ -53,6 +53,26 @@ public abstract class IdentityUserRepository_Tests<TStartupModule> : AbpIdentity
         roles.ShouldContain("supporter");
         roles.ShouldContain("manager");
     }
+    
+    [Fact]
+    public async Task GetRoleNames_By_UserIds_Async()
+    {
+        var userRoleNames = await UserRepository.GetRoleNamesAsync(new [] {
+            TestData.UserBobId,
+            TestData.UserJohnId,
+            TestData.UserNeoId,
+            TestData.UserDavidId
+        });
+       
+        userRoleNames[TestData.UserBobId].Count.ShouldBe(1);
+        userRoleNames[TestData.UserBobId][0].ShouldBe("manager");
+        userRoleNames[TestData.UserJohnId].Count.ShouldBe(2);
+        userRoleNames[TestData.UserJohnId].ShouldContain("moderator");
+        userRoleNames[TestData.UserJohnId].ShouldContain("supporter");
+        userRoleNames[TestData.UserNeoId].Count.ShouldBe(1);
+        userRoleNames[TestData.UserNeoId][0].ShouldBe("supporter");
+        userRoleNames.ShouldNotContainKey(TestData.UserDavidId);
+    }
 
     [Fact]
     public async Task FindByLoginAsync()