[MM-56206] Allow for proper paging and sorting (#25726)

Co-authored-by: Mattermost Build <build@mattermost.com>

server/channels/store/sqlstore/user_store.go

@@ -2297,17 +2297,28 @@ func (us SqlUserStore) GetUserReport(filter *model.UserReportOptions) ([]*model.
 		Select(selectColumns...).
 		From("Users u").
 		LeftJoin("Status s ON s.UserId = u.Id").
-		Where(sq.Or{
-			sq.Gt{filter.SortColumn: filter.LastSortColumnValue},
-			sq.And{
-				sq.Eq{filter.SortColumn: filter.LastSortColumnValue},
-				sq.Gt{"u.Id": filter.LastUserId},
-			},
-		}).
 		Where(sq.Expr("u.Id NOT IN (SELECT UserId FROM Bots)")).
 		GroupBy("u.Id").
 		OrderBy(sortColumnValue, "u.Id")
 
+	if (filter.Direction == "up" && !filter.SortDesc) || (filter.Direction == "down" && filter.SortDesc) {
+		query = query.Where(sq.Or{
+			sq.Lt{filter.SortColumn: filter.FromColumnValue},
+			sq.And{
+				sq.Eq{filter.SortColumn: filter.FromColumnValue},
+				sq.Lt{"u.Id": filter.FromId},
+			},
+		})
+	} else {
+		query = query.Where(sq.Or{
+			sq.Gt{filter.SortColumn: filter.FromColumnValue},
+			sq.And{
+				sq.Eq{filter.SortColumn: filter.FromColumnValue},
+				sq.Gt{"u.Id": filter.FromId},
+			},
+		})
+	}
+
 	if filter.PageSize > 0 {
 		query = query.Limit(uint64(filter.PageSize))
 	}

server/channels/store/storetest/user_store.go

@@ -6321,11 +6321,62 @@ func testGetUserReport(t *testing.T, rctx request.CTX, ss store.Store) {
 	t.Run("should return correct paging", func(t *testing.T) {
 		userReport, err := ss.User().GetUserReport(&model.UserReportOptions{
 			ReportingBaseOptions: model.ReportingBaseOptions{
-				SortColumn:          "Username",
-				PageSize:            50,
-				LastSortColumnValue: u2.Username,
+				SortColumn:      "Username",
+				Direction:       "down",
+				PageSize:        50,
+				FromColumnValue: u2.Username,
+				FromId:          u2.Id,
+			},
+		})
+		require.NoError(t, err)
+		require.NotNil(t, userReport)
+		require.Equal(t, 1, len(userReport))
+
+		require.NotNil(t, userReport[0])
+		require.Equal(t, u3.Username, userReport[0].Username)
+
+		userReport, err = ss.User().GetUserReport(&model.UserReportOptions{
+			ReportingBaseOptions: model.ReportingBaseOptions{
+				SortColumn:      "Username",
+				SortDesc:        true,
+				Direction:       "down",
+				PageSize:        50,
+				FromColumnValue: u2.Username,
+				FromId:          u2.Id,
+			},
+		})
+		require.NoError(t, err)
+		require.NotNil(t, userReport)
+		require.Equal(t, 1, len(userReport))
+
+		require.NotNil(t, userReport[0])
+		require.Equal(t, u1.Username, userReport[0].Username)
+
+		userReport, err = ss.User().GetUserReport(&model.UserReportOptions{
+			ReportingBaseOptions: model.ReportingBaseOptions{
+				SortColumn:      "Username",
+				Direction:       "up",
+				PageSize:        50,
+				FromColumnValue: u2.Username,
+				FromId:          u2.Id,
+			},
+		})
+		require.NoError(t, err)
+		require.NotNil(t, userReport)
+		require.Equal(t, 1, len(userReport))
+
+		require.NotNil(t, userReport[0])
+		require.Equal(t, u1.Username, userReport[0].Username)
+
+		userReport, err = ss.User().GetUserReport(&model.UserReportOptions{
+			ReportingBaseOptions: model.ReportingBaseOptions{
+				SortColumn:      "Username",
+				SortDesc:        true,
+				Direction:       "up",
+				PageSize:        50,
+				FromColumnValue: u2.Username,
+				FromId:          u2.Id,
 			},
-			LastUserId: u2.Id,
 		})
 		require.NoError(t, err)
 		require.NotNil(t, userReport)