End of chapter 6. A lot of problems took to much time to solve. It was good to know better Godot internal mechanism.

scripts/game/commands/Command.gd

@@ -4,7 +4,6 @@ signal COMMAND_PROCESSED(label)
 
 var commandLabel
 
-
 func execute():
 	COMMAND_PROCESSED.emit(commandLabel)
 

scripts/game/commands/CommandDispatcher.gd

@@ -3,3 +3,9 @@ extends Node
 signal PROCESS_COMMAND(command)
 signal WAIT_FOR_COMMAND
 signal PAUSE_PROCESSOR
+
+signal PLAYER_MOVE(direction)
+
+signal DISPLAY_MESSAGE(message)
+signal DISPLAY_COMMAND_PROMPT
+signal DISPLAY_CLEAR

scripts/game/commands/MoveCommand.gd

@@ -0,0 +1,22 @@
+extends Command
+
+class_name MoveCommand
+
+var direction
+
+func _init(dir):
+	commandLabel = "Move"
+	direction = dir
+
+
+func execute():
+	CommandDispatcher.PLAYER_MOVE.emit(direction)
+	emit_signal("COMMAND_PROCESSED", getCommandText())
+
+
+func getDirectionString() -> String:
+	return Map.Direction.keys()[direction]
+
+
+func getCommandText():
+	return "%s %s" % [commandLabel, getDirectionString()]

scripts/game/commands/MoveCommand.gd.uid

@@ -0,0 +1 @@
+uid://c136g73lrccts

scripts/game/commands/PassCommand.gd

@@ -2,9 +2,10 @@ extends Command
 
 class_name PassCommand
 
-func _init() -> void:
+func _init():
 	commandLabel = "Pass"
 
+
 func execute():
 	print("Player passed.")
 	COMMAND_PROCESSED.emit(commandLabel)