Nodes - Added gradient nodes

Nodes - Added color gradient pin type
Data bindings - Changed color gradient data bindings to now take a color gradient

src/Artemis.Storage/Migrations/M0021GradientNodes.cs

@@ -0,0 +1,87 @@
+using System;
+using System.Linq;
+using Artemis.Storage.Entities.Profile;
+using Artemis.Storage.Entities.Profile.Nodes;
+using Artemis.Storage.Migrations.Interfaces;
+using LiteDB;
+
+namespace Artemis.Storage.Migrations;
+
+public class M0021GradientNodes : IStorageMigration
+{
+    private void MigrateDataBinding(PropertyEntity property)
+    {
+        NodeScriptEntity script = property.DataBinding.NodeScript;
+        NodeEntity exitNode = script.Nodes.FirstOrDefault(s => s.IsExitNode);
+        if (exitNode == null)
+            return;
+
+        // Create a new node at the same position of the exit node
+        NodeEntity gradientNode = new()
+        {
+            Id = Guid.NewGuid(),
+            Type = "ColorGradientNode",
+            PluginId = Guid.Parse("ffffffff-ffff-ffff-ffff-ffffffffffff"),
+            Name = "Color Gradient",
+            Description = "Outputs a color gradient with the given colors",
+            X = exitNode.X,
+            Y = exitNode.Y,
+            Storage = property.Value // Copy the value of the property into the node storage
+        };
+        script.Nodes.Add(gradientNode);
+
+        // Move all connections of the exit node to the new node
+        foreach (NodeConnectionEntity connection in script.Connections)
+        {
+            if (connection.SourceNode == exitNode.Id)
+            {
+                connection.SourceNode = gradientNode.Id;
+                connection.SourcePinId++;
+            }
+        }
+
+        // Connect the data binding node to the source node
+        script.Connections.Add(new NodeConnectionEntity
+        {
+            SourceType = "ColorGradient",
+            SourceNode = exitNode.Id,
+            SourcePinCollectionId = -1,
+            SourcePinId = 0,
+            TargetType = "ColorGradient",
+            TargetNode = gradientNode.Id,
+            TargetPinCollectionId = -1,
+            TargetPinId = 0,
+        });
+
+        // Move the exit node to the right
+        exitNode.X += 300;
+        exitNode.Y += 30;
+    }
+
+    public int UserVersion => 21;
+
+    public void Apply(LiteRepository repository)
+    {
+        // Find all color gradient data bindings, there's no really good way to do this so infer it from the value
+        ILiteCollection<ProfileEntity> collection = repository.Database.GetCollection<ProfileEntity>();
+        foreach (ProfileEntity profileEntity in collection.FindAll())
+        {
+            foreach (LayerEntity layer in profileEntity.Layers)
+                MigrateDataBinding(layer.LayerBrush.PropertyGroup);
+
+            collection.Update(profileEntity);
+        }
+    }
+
+    private void MigrateDataBinding(PropertyGroupEntity propertyGroup)
+    {
+        foreach (PropertyGroupEntity propertyGroupPropertyGroup in propertyGroup.PropertyGroups)
+            MigrateDataBinding(propertyGroupPropertyGroup);
+
+        foreach (PropertyEntity property in propertyGroup.Properties)
+        {
+            if (property.Value.StartsWith("[{\"Color\":\"") && property.DataBinding?.NodeScript != null && property.DataBinding.IsEnabled)
+                MigrateDataBinding(property);
+        }
+    }
+}