serialize to json/dictionary, instance by type

classes/deck/deck.gd

@@ -39,6 +39,19 @@ func add_node(node: GDScript, meta: Dictionary = {}) -> DeckNode:
 	return node_inst
 
 
+func add_node_inst(node: DeckNode) -> DeckNode:
+	var uuid := UUID.v4()
+	nodes[uuid] = node
+	node._belonging_to = self
+	node._id = uuid
+
+#	if !meta.is_empty():
+#		for k in meta:
+#			node.set_meta(k, meta[k])
+
+	return node
+
+
 func get_node(uuid: String) -> DeckNode:
 	return nodes.get(uuid)
 
@@ -61,3 +74,18 @@ func connect_nodes(from_node: DeckNode, to_node: DeckNode, from_port: int, to_po
 func disconnect_nodes(from_node: DeckNode, to_node: DeckNode, from_port: int, to_port: int) -> void:
 	var hash = {to_node._id: to_port}.hash()
 	from_node.remove_outgoing_connection(from_port, hash)
+
+
+func to_json(with_meta: bool = true) -> String:
+	var inner := {"nodes": {}}
+
+	for id in nodes.keys():
+		inner["nodes"][id] = nodes[id].to_dict(with_meta)
+
+	var d := {"deck": inner}
+
+	if with_meta:
+		d["meta"] = {}
+		for meta in get_meta_list():
+			d["meta"][meta] = get_meta(meta)
+	return JSON.stringify(d, "\t", false)

classes/deck/deck_node.gd

@@ -10,6 +10,9 @@ var ports: Array[Port]
 
 var _belonging_to: Deck
 var _id: String
+var node_type: String
+
+var props_to_serialize: Array[StringName]
 
 enum PortType{
 	INPUT, ## Input port type (slot on the left).
@@ -160,3 +163,19 @@ func get_all_ports() -> Array[Port]:
 
 func get_node(uuid: String) -> DeckNode:
 	return _belonging_to.get_node(uuid)
+
+
+func to_dict(with_meta: bool = true) -> Dictionary:
+	var d := {
+		"_id": _id,
+		"name": name,
+		"outgoing_connections": outgoing_connections,
+		"incoming_connections": incoming_connections,
+		"props": props_to_serialize,
+		"node_type": node_type,
+	}
+	if with_meta:
+		d["meta"] = {}
+		for meta in get_meta_list():
+			d["meta"][meta] = get_meta(meta)
+	return d

classes/deck/node_db.gd

@@ -0,0 +1,27 @@
+extends Node
+
+const BASE_NODE_PATH := "res://classes/deck/nodes/"
+var nodes: Dictionary = {}
+
+
+func _init() -> void:
+	var dir := DirAccess.open(BASE_NODE_PATH)
+	dir.list_dir_begin()
+	var current_file := dir.get_next()
+	while current_file != "":
+		print(current_file)
+		if current_file.ends_with(".gd"):
+			var f := FileAccess.open(BASE_NODE_PATH.path_join(current_file), FileAccess.READ)
+			var line := f.get_line()
+			if !line.begins_with("###type="):
+				current_file = dir.get_next()
+				continue
+			nodes[line.trim_prefix("###type=")] = BASE_NODE_PATH.path_join(current_file)
+		current_file = dir.get_next()
+
+
+func instance_node(type: String) -> DeckNode:
+	if !nodes.has(type):
+		return null
+
+	return load(nodes[type]).new()

classes/deck/nodes/button.gd

@@ -1,3 +1,4 @@
+###type=button
 extends DeckNode
 
 
@@ -9,3 +10,4 @@ func _init() -> void:
 	)
 
 	name = "Button"
+	node_type = name.to_snake_case()

classes/deck/nodes/get_deck_var.gd

@@ -1,3 +1,4 @@
+###type=get_deck_var
 extends DeckNode
 
 
@@ -9,6 +10,7 @@ func _init() -> void:
 	)
 
 	name = "Get Deck Var"
+	node_type = name.to_snake_case()
 
 
 func _value_request(from_port: int) -> Variant:

classes/deck/nodes/no_type.gd

@@ -0,0 +1 @@
+extends Node

classes/deck/nodes/print.gd

@@ -1,3 +1,4 @@
+###type=print
 extends DeckNode
 
 
@@ -21,6 +22,7 @@ func _init() -> void:
 	)
 
 	name = "Print"
+	node_type = name.to_snake_case()
 
 
 func _receive(to_port: int, data: DeckType, extra_data: Array = []) -> void:

classes/deck/nodes/set_deck_var.gd

@@ -1,3 +1,4 @@
+###type=set_deck_var
 extends DeckNode
 
 
@@ -27,6 +28,7 @@ func _init() -> void:
 	)
 
 	name = "Set Deck Var"
+	node_type = name.to_snake_case()
 
 
 func _receive(to_port: int, data: DeckType, extra_data: Array = []) -> void:

graph_node_renderer/deck_node_renderer_graph_node.gd

@@ -43,3 +43,7 @@ func _ready() -> void:
 			0,
 			Color.WHITE,
 		)
+
+
+func _on_position_offset_changed() -> void:
+	node.set_meta("position_offset", position_offset)

graph_node_renderer/deck_node_renderer_graph_node.tscn

@@ -7,3 +7,5 @@ offset_right = 280.0
 offset_bottom = 217.0
 title = "Deck Node"
 script = ExtResource("1_pos0w")
+
+[connection signal="position_offset_changed" from="." to="." method="_on_position_offset_changed"]

graph_node_renderer/deck_renderer_graph_edit.gd

@@ -3,10 +3,10 @@ extends GraphEdit
 const NODE_SCENE := preload("res://graph_node_renderer/deck_node_renderer_graph_node.tscn")
 
 var deck: Deck = Deck.new()
-var button_node = preload("res://classes/deck/nodes/button.gd")
-var print_node = preload("res://classes/deck/nodes/print.gd")
-var get_var_node = preload("res://classes/deck/nodes/get_deck_var.gd")
-var set_var_node = preload("res://classes/deck/nodes/set_deck_var.gd")
+#var button_node = preload("res://classes/deck/nodes/button.gd")
+#var print_node = preload("res://classes/deck/nodes/print.gd")
+#var get_var_node = preload("res://classes/deck/nodes/get_deck_var.gd")
+#var set_var_node = preload("res://classes/deck/nodes/set_deck_var.gd")
 
 func _ready() -> void:
 	var add_button := Button.new()
@@ -22,9 +22,21 @@ func _ready() -> void:
 	get_zoom_hbox().add_child(get_var)
 	get_zoom_hbox().add_child(set_var)
 
+	var save_btn := Button.new()
+	save_btn.text = "Save"
+	get_zoom_hbox().add_child(save_btn)
+
+	save_btn.pressed.connect(
+		func():
+			var t = deck.to_json()
+			var f := FileAccess.open("user://save_test.json", FileAccess.WRITE)
+			f.store_string(t)
+	)
+
 	add_button.pressed.connect(
 		func():
-			var node := deck.add_node(button_node)
+			var node := NodeDB.instance_node("button")
+			deck.add_node_inst(node)
 			var node_renderer: DeckNodeRendererGraphNode = NODE_SCENE.instantiate()
 			node_renderer.node = node
 			add_child(node_renderer)
@@ -32,7 +44,8 @@ func _ready() -> void:
 
 	add_print.pressed.connect(
 		func():
-			var node := deck.add_node(print_node)
+			var node := NodeDB.instance_node("print")
+			deck.add_node_inst(node)
 			var node_renderer: DeckNodeRendererGraphNode = NODE_SCENE.instantiate()
 			node_renderer.node = node
 			add_child(node_renderer)
@@ -40,7 +53,8 @@ func _ready() -> void:
 
 	get_var.pressed.connect(
 		func():
-			var node := deck.add_node(get_var_node)
+			var node := NodeDB.instance_node("get_deck_var")
+			deck.add_node_inst(node)
 			var node_renderer: DeckNodeRendererGraphNode = NODE_SCENE.instantiate()
 			node_renderer.node = node
 			add_child(node_renderer)
@@ -48,7 +62,8 @@ func _ready() -> void:
 
 	set_var.pressed.connect(
 		func():
-			var node := deck.add_node(set_var_node)
+			var node := NodeDB.instance_node("set_deck_varbutton")
+			deck.add_node_inst(node)
 			var node_renderer: DeckNodeRendererGraphNode = NODE_SCENE.instantiate()
 			node_renderer.node = node
 			add_child(node_renderer)
@@ -79,3 +94,7 @@ func attempt_disconnect(from_node_name: StringName, from_port: int, to_node_name
 	deck.disconnect_nodes(from_node, to_node, from_output, to_input)
 
 	disconnect_node(from_node_name, from_port, to_node_name, to_port)
+
+
+func _on_scroll_offset_changed(offset: Vector2) -> void:
+	deck.set_meta("offset", offset)

graph_node_renderer/deck_renderer_graph_edit.tscn

@@ -10,3 +10,5 @@ grow_horizontal = 2
 grow_vertical = 2
 right_disconnects = true
 script = ExtResource("1_pojfs")
+
+[connection signal="scroll_offset_changed" from="." to="." method="_on_scroll_offset_changed"]

project.godot

@@ -16,3 +16,7 @@ run/main_scene="res://graph_node_renderer/deck_renderer_graph_edit.tscn"
 config/features=PackedStringArray("4.1", "Forward Plus")
 run/low_processor_mode=true
 config/icon="res://icon.svg"
+
+[autoload]
+
+NodeDB="*res://classes/deck/node_db.gd"