Rework the runtime delta experiment to the agreed shape: graph-craft structural deltas, an editor metadata wrapper, and diff-derived metadata ops

document/graph-storage/src/crdt.rs

@@ -92,7 +92,7 @@ impl Delta {
 
 /// Op payload. Timestamps live on the wrapping `Delta` — one per delta, applied to all LWW-eligible
 /// writes within. See `notes/document-format-collaboration.md`.
-#[derive(Clone, Debug, Serialize, Deserialize)]
+#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub enum RegistryDelta {
 	AddNode {
 		id: NodeId,
@@ -190,7 +190,7 @@ pub enum RegistryDelta {
 }
 
 /// `value: None` means remove. The timestamp comes from the wrapping `Delta`.
-#[derive(Clone, Debug, Serialize, Deserialize)]
+#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct AttributeDelta {
 	pub key: String,
 	pub value: Option<serde_json::Value>,

document/graph-storage/src/from_runtime.rs

@@ -423,6 +423,27 @@ fn convert_node<M: NodeMetadataSource + ?Sized>(
 	})
 }
 
+pub fn encode_node_ui_attributes<M: NodeMetadataSource + ?Sized>(
+	attributes: &mut crate::Attributes,
+	metadata: &M,
+	metadata_path: &[RuntimeNodeId],
+	runtime_node_id: RuntimeNodeId,
+	timestamp: TimeStamp,
+) -> Result<(), ConversionError> {
+	write_ui_attributes(attributes, metadata, metadata_path, runtime_node_id, timestamp)
+}
+
+pub fn encode_input_ui_attributes<M: NodeMetadataSource + ?Sized>(
+	attributes: &mut crate::Attributes,
+	metadata: &M,
+	metadata_path: &[RuntimeNodeId],
+	runtime_node_id: RuntimeNodeId,
+	input_index: usize,
+	timestamp: TimeStamp,
+) -> Result<(), ConversionError> {
+	write_ui_input_attributes(attributes, metadata, metadata_path, runtime_node_id, input_index, timestamp)
+}
+
 fn write_ui_attributes<M: NodeMetadataSource + ?Sized>(
 	attributes: &mut crate::Attributes,
 	metadata: &M,
@@ -613,6 +634,13 @@ impl PathResolver {
 		child_path(owner.as_ref(), self.network_id(local_path), local_id).to_global_id(self.peer)
 	}
 
+	/// Converts one runtime input inside the network at `local_path` to its storage form, resolving
+	/// node references to their stable global IDs.
+	pub fn convert_input_at(&self, input: &GraphCraftNodeInput, local_path: &[RuntimeNodeId]) -> Result<NodeInput, ConversionError> {
+		let owner = self.owner_path(local_path);
+		convert_input(input, owner.as_ref(), self.network_id(local_path), self.peer)
+	}
+
 	/// The `NodePath` of the node owning the network at `local_path`, or `None` for the root network.
 	fn owner_path(&self, local_path: &[RuntimeNodeId]) -> Option<NodePath> {
 		let mut owner: Option<NodePath> = None;
@@ -703,10 +731,15 @@ impl<'m, M: NodeMetadataSource + ?Sized> ScopedConversion<'m, M> {
 /// whole `TaggedValue`, which can be arbitrarily large. `resource_ref_shape_matches_serde` asserts
 /// this stays in lockstep with the real serialization.
 pub fn node_value_resource_refs(node: &Node) -> impl Iterator<Item = ResourceId> + '_ {
-	node.inputs.iter().filter_map(|slot| match &slot.input {
+	node.inputs.iter().filter_map(|slot| value_resource_ref(&slot.input))
+}
+
+/// The `TaggedValue::Resource` ID referenced by a stored value input, if any.
+pub fn value_resource_ref(input: &NodeInput) -> Option<ResourceId> {
+	match input {
 		NodeInput::Value { value, .. } => value.get("Resource").and_then(|id| serde_json::from_value(id.clone()).ok()),
 		_ => None,
-	})
+	}
 }
 
 #[cfg(test)]

document/graph-storage/src/lib.rs

@@ -29,7 +29,10 @@ pub use resources::*;
 pub use session::*;
 
 #[cfg(any(feature = "conversion", test))]
-pub use from_runtime::{PathResolver, RuntimeConversion, ScopedConversion, convert_resource_entry, decode_declaration, encode_declaration, node_value_resource_refs};
+pub use from_runtime::{
+	PathResolver, RuntimeConversion, ScopedConversion, convert_resource_entry, decode_declaration, encode_declaration, encode_input_ui_attributes, encode_node_ui_attributes, node_value_resource_refs,
+	value_resource_ref,
+};
 #[cfg(any(feature = "conversion", test))]
 pub use metadata_source::{InputMetadataEntry, NetworkMetadataEntry, NoMetadata, NodeMetadataEntry, NodeMetadataSource, Position};
 #[cfg(any(feature = "conversion", test))]