add license, move folders

app/scripts/ui/menu/menu_navigation.gd

@@ -0,0 +1,80 @@
+extends Node
+
+@export var gate_events: GateEvents
+@export var history: History
+
+@export var go_back: BaseButton
+@export var go_forw: BaseButton
+@export var reload: BaseButton
+@export var home: BaseButton
+
+
+func _ready() -> void:
+	gate_events.open_gate.connect(on_new)
+	gate_events.search.connect(on_new)
+	
+	go_back.pressed.connect(on_go_back)
+	go_forw.pressed.connect(on_go_forw)
+	reload.pressed.connect(on_reload)
+	home.pressed.connect(on_home)
+	
+	disable([go_back, go_forw, reload, home])
+
+
+func on_new(location: String) -> void:
+	history.add(location)
+	enable([go_back, reload, home])
+	if not history.can_forw():
+		disable([go_forw])
+
+
+func on_go_back() -> void:
+	var location = history.back()
+	
+	enable([go_forw])
+	if history.can_back():
+		open(location)
+	else:
+		disable([go_back, reload, home])
+		gate_events.exit_gate_emit()
+
+
+func on_go_forw() -> void:
+	var location = history.forw()
+	
+	enable([go_back])
+	if not history.can_forw():
+		disable([go_forw])
+	
+	open(location)
+
+
+func on_reload() -> void:
+	open(history.get_current())
+
+
+func on_home() -> void:
+	history.clear()
+	disable([go_back, go_forw, reload, home])
+	gate_events.exit_gate_emit()
+
+
+func open(location: String) -> void:
+	if Url.is_valid(location):
+		gate_events.open_gate_emit(location)
+	else:
+		gate_events.search_emit(location)
+
+
+func disable(buttons: Array[BaseButton]) -> void:
+	for button in buttons:
+		button.disabled = true
+		button.modulate.a = 0.5
+		button.mouse_default_cursor_shape = Control.CURSOR_ARROW
+
+
+func enable(buttons: Array[BaseButton]) -> void:
+	for button in buttons:
+		button.disabled = false
+		button.modulate.a = 1
+		button.mouse_default_cursor_shape = Control.CURSOR_POINTING_HAND