Add a few convenience implementations for UpdateDataValues on IInstance interface

src/Altinn.App.Core/Interface/IInstance.cs

@@ -1,3 +1,4 @@
+using Altinn.App.Core.Models;
 using Altinn.Platform.Storage.Interface.Models;
 using Microsoft.Extensions.Primitives;
 
@@ -92,6 +93,36 @@ public interface IInstance
         /// <returns>Returns the updated instance.</returns>
         Task<Instance> UpdateDataValues(int instanceOwnerPartyId, Guid instanceGuid, DataValues dataValues);
 
+        /// <summary>
+        /// Update data data values.
+        /// </summary>
+        /// <remarks>
+        /// The provided data value will be added with the existing collection of data values on the instance.
+        /// </remarks>
+        /// <param name="instance">The instance</param>
+        /// <param name="dataValues">The data value (null unsets the value)</param>
+        /// <returns>Returns the updated instance.</returns>
+        async Task<Instance> UpdateDataValues(Instance instance, Dictionary<string, string?> dataValues)
+        {
+            var id = new InstanceIdentifier(instance);
+            return await UpdateDataValues(id.InstanceOwnerPartyId, id.InstanceGuid, new DataValues{Values = dataValues});
+        }
+
+        /// <summary>
+        /// Update single data value.
+        /// </summary>
+        /// <remarks>
+        /// The provided data value will be added with the existing collection of data values on the instance.
+        /// </remarks>
+        /// <param name="instance">The instance</param>
+        /// <param name="key">The key of the DataValues collection to be updated.</param>
+        /// <param name="value">The data value (null unsets the value)</param>
+        /// <returns>Returns the updated instance.</returns>
+        async Task<Instance> UpdateDataValue(Instance instance, string key, string? value)
+        {
+            return await UpdateDataValues(instance, new Dictionary<string, string?>{{key, value}});
+        }
+
         /// <summary>
         /// Delete instance.
         /// </summary>

src/Altinn.App.Core/Models/InstanceIdentifier.cs

@@ -1,3 +1,5 @@
+using Altinn.Platform.Storage.Interface.Models;
+
 namespace Altinn.App.Core.Models
 {
     /// <summary>
@@ -27,6 +29,12 @@ public InstanceIdentifier(string instanceId)
             IsNoInstance = false;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="InstanceIdentifier"/> class.
+        /// </summary>
+        /// <param name="instance">Is the instance you want to get an idenifier from</param>
+        public InstanceIdentifier(Instance instance) : this(instance.Id) {}
+
         /// <summary>
         /// Initializes a new instance of the <see cref="InstanceIdentifier"/> class. For instances without OwnerPartyId and InstanceId, ex: Stateless applications.
         /// </summary>