Feat/add metadata

src/Altinn.App.Core/Internal/Data/InstanceDataUnitOfWork.cs

@@ -478,6 +478,14 @@ DataElementChange change
             new MemoryAsStream(bytes),
             authenticationMethod: GetAuthenticationMethod(change.DataType)
         );
+
+        if (change.Metadata is not null)
+        {
+            dataElement.Metadata = [.. change.Metadata];
+            await _dataClient.Update(Instance, dataElement);
+            change.Lock = true;
+        }
+
         // Update caches
         _binaryCache.Set(dataElement, bytes);
         change.DataElement = dataElement; // Set the data element so that it can be referenced later in the save process

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

@@ -47,6 +47,11 @@ private protected DataElementChange(
         ContentType = contentType;
     }
 
+    /// <summary>
+    /// The metadata of the data element
+    /// </summary>
+    private List<KeyValueEntry>? _metadata;
+
     /// <summary>
     /// The type of update: Create, Update or Delete
     /// </summary>
@@ -72,6 +77,37 @@ private protected DataElementChange(
     /// The contentType of an element in storage
     /// </summary>
     public string ContentType { get; }
+
+    /// <summary>
+    /// The metadata of the data element
+    /// </summary>
+    internal IReadOnlyCollection<KeyValueEntry>? Metadata => _metadata;
+
+    /// <summary>
+    /// If true, no more metadata can be added
+    /// </summary>
+    internal bool Lock { get; set; }
+
+    /// <summary>
+    /// Add metadata to a created data element
+    /// </summary>
+    public void AddMetadata(string key, string value)
+    {
+        ArgumentException.ThrowIfNullOrWhiteSpace(key);
+        ArgumentException.ThrowIfNullOrWhiteSpace(value);
+
+        if (Type != ChangeType.Created)
+        {
+            throw new InvalidOperationException("Metadata can only be added to created data elements");
+        }
+
+        if (Lock)
+        {
+            throw new InvalidOperationException("Metadata already locked");
+        }
+        _metadata =  [];
+        _metadata.Add(new KeyValueEntry { Key = key, Value = value });
+    }
 }
 
 /// <summary>

test/Altinn.App.Core.Tests/PublicApiTests.PublicApi_ShouldNotChange_Unintentionally.verified.txt

@@ -4157,6 +4157,7 @@ namespace Altinn.App.Core.Models
         public Altinn.App.Core.Models.DataElementIdentifier DataElementIdentifier { get; }
         public Altinn.Platform.Storage.Interface.Models.DataType DataType { get; }
         public Altinn.App.Core.Models.ChangeType Type { get; }
+        public void AddMetadata(string key, string value) { }
     }
     public sealed class DataElementChanges
     {