Added Glitch Room Source code to Gitty

core/simulation/simulated_hardware_backend.gd

@@ -0,0 +1,102 @@
+class_name SimulatedHardwareBackend
+extends RefCounted
+
+
+signal pin_state_changed(
+	cabinet_id: StringName,
+	gpio_pin: int,
+	active: bool,
+	action_id: StringName,
+	context: Dictionary
+)
+
+signal trace_entry_created(
+	entry: Dictionary
+)
+
+
+var pin_states: Dictionary = {}
+
+
+func reset() -> void:
+
+	pin_states.clear()
+
+
+func activate_action(
+	cabinet_id: StringName,
+	action: HardwareAction,
+	context: Dictionary
+) -> void:
+
+	if action == null:
+		return
+
+	var gpio_active := action.active_high
+
+	_set_pin_state(
+		cabinet_id,
+		action,
+		gpio_active,
+		true,
+		context
+	)
+
+
+func deactivate_action(
+	cabinet_id: StringName,
+	action: HardwareAction,
+	context: Dictionary
+) -> void:
+
+	if action == null:
+		return
+
+	var gpio_active := not action.active_high
+
+	_set_pin_state(
+		cabinet_id,
+		action,
+		gpio_active,
+		false,
+		context
+	)
+
+
+func _set_pin_state(
+	cabinet_id: StringName,
+	action: HardwareAction,
+	electrical_state: bool,
+	logical_active: bool,
+	context: Dictionary
+) -> void:
+
+	var key := "%s::%d" % [
+		cabinet_id,
+		action.gpio_pin
+	]
+
+	pin_states[key] = electrical_state
+
+	var entry := {
+		"type": &"gpio",
+		"cabinet_id": cabinet_id,
+		"action_id": action.action_id,
+		"gpio_pin": action.gpio_pin,
+		"electrical_state": electrical_state,
+		"logical_active": logical_active,
+		"active_high": action.active_high,
+		"context": context.duplicate(),
+	}
+
+	trace_entry_created.emit(
+		entry
+	)
+
+	pin_state_changed.emit(
+		cabinet_id,
+		action.gpio_pin,
+		logical_active,
+		action.action_id,
+		context
+	)