2 files changed, 53 insertions, 15 deletions

diff --git a/src/shared/AtomReader.cpp b/src/shared/AtomReader.cpp
index fa14243a..99a09b44 100644
--- a/src/shared/AtomReader.cpp
+++ b/src/shared/AtomReader.cpp
@@ -35,11 +35,13 @@ AtomReader::AtomReader(LV2URIMap& map, URIs& uris, Forge& forge, Interface& ifac
 void
 AtomReader::get_uri(const LV2_Atom* in, Raul::Atom& out)
 {
-	if (in->type == _uris.atom_URID) {
-		const LV2_Atom_URID* urid = (const LV2_Atom_URID*)in;
-		out = _forge.alloc_uri(_map.unmap_uri(urid->body));
-	} else {
-		out = _forge.alloc(in->size, in->type, LV2_ATOM_BODY(in));
+	if (in) {
+		if (in->type == _uris.atom_URID) {
+			const LV2_Atom_URID* urid = (const LV2_Atom_URID*)in;
+			out = _forge.alloc_uri(_map.unmap_uri(urid->body));
+		} else {
+			out = _forge.alloc(in->size, in->type, LV2_ATOM_BODY(in));
+		}
 	}
 }
 
@@ -76,6 +78,33 @@ AtomReader::write(const LV2_Atom* msg)
 	if (obj->body.otype == _uris.patch_Get) {
 		_iface.set_response_id(obj->body.id);
 		_iface.get(subject_uri);
+	} else if (obj->body.otype == _uris.patch_Delete) {
+		if (subject_uri) {
+			_iface.del(subject_uri);
+			return;
+		}
+
+		const LV2_Atom_Object* body = NULL;
+		lv2_atom_object_get(obj, (LV2_URID)_uris.patch_body, &body, 0);
+		if (body && body->body.otype == _uris.ingen_Edge) {
+			const LV2_Atom* tail = NULL;
+			const LV2_Atom* head = NULL;
+			lv2_atom_object_get(body,
+			                    (LV2_URID)_uris.ingen_tail, &tail,
+			                    (LV2_URID)_uris.ingen_head, &head,
+			                    NULL);
+
+			Raul::Atom tail_atom;
+			Raul::Atom head_atom;
+			get_uri(tail, tail_atom);
+			get_uri(head, head_atom);
+			if (tail_atom.is_valid() && head_atom.is_valid()) {
+				_iface.disconnect(Raul::Path(tail_atom.get_uri()),
+				                  Raul::Path(head_atom.get_uri()));
+			} else {
+				Raul::warn << "Delete of unknown object." << std::endl;
+			}
+		}
 	} else if (obj->body.otype == _uris.patch_Put) {
 		const LV2_Atom_Object* body = NULL;
 		lv2_atom_object_get(obj, (LV2_URID)_uris.patch_body, &body, 0);
diff --git a/src/shared/AtomWriter.cpp b/src/shared/AtomWriter.cpp
index 4e3853e8..d77364a5 100644
--- a/src/shared/AtomWriter.cpp
+++ b/src/shared/AtomWriter.cpp
@@ -105,6 +105,18 @@ AtomWriter::forge_properties(const Resource::Properties& properties)
 }
 
 void
+AtomWriter::forge_edge(const Raul::URI& tail, const Raul::URI& head)
+{
+	LV2_Atom_Forge_Frame edge;
+	lv2_atom_forge_blank(&_forge, &edge, 0, _uris.ingen_Edge);
+	lv2_atom_forge_property_head(&_forge, _uris.ingen_tail, 0);
+	forge_uri(tail);
+	lv2_atom_forge_property_head(&_forge, _uris.ingen_head, 0);
+	forge_uri(head);
+	lv2_atom_forge_pop(&_forge, &edge);
+}
+
+void
 AtomWriter::put(const Raul::URI&            uri,
                 const Resource::Properties& properties,
                 Resource::Graph             ctx)
@@ -180,17 +192,8 @@ AtomWriter::connect(const Raul::Path& src,
 	lv2_atom_forge_property_head(&_forge, _uris.patch_subject, 0);
 	forge_uri(Raul::Path::lca(src, dst));
 	lv2_atom_forge_property_head(&_forge, _uris.patch_body, 0);
-
-	LV2_Atom_Forge_Frame body;
-	lv2_atom_forge_blank(&_forge, &body, 0, _uris.ingen_Edge);
-	lv2_atom_forge_property_head(&_forge, _uris.ingen_tail, 0);
-	forge_uri(src);
-	lv2_atom_forge_property_head(&_forge, _uris.ingen_head, 0);
-	forge_uri(dst);
-	lv2_atom_forge_pop(&_forge, &body);
-
+	forge_edge(src, dst);
 	lv2_atom_forge_pop(&_forge, &msg);
-
 	finish_msg();
 }
 
@@ -198,6 +201,12 @@ void
 AtomWriter::disconnect(const Raul::URI& src,
                        const Raul::URI& dst)
 {
+	LV2_Atom_Forge_Frame msg;
+	lv2_atom_forge_blank(&_forge, &msg, next_id(), _uris.patch_Delete);
+	lv2_atom_forge_property_head(&_forge, _uris.patch_body, 0);
+	forge_edge(src, dst);
+	lv2_atom_forge_pop(&_forge, &msg);
+	finish_msg();
 }
 
 void