feature: user details are individually exported; shared export field renderer

Disco.Models/UI/Config/DeviceFlag/ConfigDeviceFlagExportModel.cs

@@ -1,6 +1,7 @@
 using Disco.Models.Services.Devices.DeviceFlag;
 using Disco.Models.Services.Exporting;
 using Disco.Models.UI;
+using Disco.Models.UI.Shared;
 using System;
 using System.Collections.Generic;
 
@@ -14,5 +15,7 @@ namespace Disco.Models.Areas.Config.UI.DeviceFlag
         ExportResult ExportResult { get; set; }
 
         List<Repository.DeviceFlag> DeviceFlags { get; set; }
+
+        SharedExportFieldsModel<DeviceFlagExportOptions> Fields { get; set; }
     }
 }

Disco.Models/UI/Config/UserFlag/ConfigUserFlagExportModel.cs

@@ -1,6 +1,8 @@
-using Disco.Models.Services.Exporting;
+using Disco.Models.Services.Devices;
+using Disco.Models.Services.Exporting;
 using Disco.Models.Services.Users.UserFlags;
 using Disco.Models.UI;
+using Disco.Models.UI.Shared;
 using System;
 using System.Collections.Generic;
 
@@ -14,5 +16,7 @@ namespace Disco.Models.Areas.Config.UI.UserFlag
         ExportResult ExportResult { get; set; }
 
         List<Repository.UserFlag> UserFlags { get; set; }
+
+        SharedExportFieldsModel<UserFlagExportOptions> Fields { get; set; }
     }
 }

Disco.Models/UI/Device/DeviceExportModel.cs

@@ -1,5 +1,6 @@
 using Disco.Models.Services.Devices;
 using Disco.Models.Services.Exporting;
+using Disco.Models.UI.Shared;
 using System;
 using System.Collections.Generic;
 
@@ -15,5 +16,7 @@ namespace Disco.Models.UI.Device
         IEnumerable<KeyValuePair<int, string>> DeviceBatches { get; set; }
         IEnumerable<KeyValuePair<int, string>> DeviceModels { get; set; }
         IEnumerable<KeyValuePair<int, string>> DeviceProfiles { get; set; }
+
+        SharedExportFieldsModel<DeviceExportOptions> Fields { get; set; }
     }
 }

Disco.Models/UI/Shared/SharedExportFieldsModel.cs

@@ -1,5 +1,7 @@
 using Disco.Models.Services.Exporting;
+using System;
 using System.Collections.Generic;
+using System.Linq.Expressions;
 
 namespace Disco.Models.UI.Shared
 {
@@ -8,5 +10,6 @@ namespace Disco.Models.UI.Shared
     {
         T Options { get; set; }
         List<ExportOptionGroup> FieldGroups { get; set; }
+        void AddCustomUserDetails(Expression<Func<T, List<string>>> modelAccessor, int groupIndex = -1);
     }
 }