optional string usage for CLI is possible on all commands

groundStation/src/cli/cli_source.c

@@ -39,6 +39,7 @@ int cli_getsource(struct backend_conn * conn, int argc, char ** argv) {
 
 int cli_setsource(struct backend_conn * conn, int argc, char ** argv) {
 	struct frontend_source_data source_data;
+	struct convert_data conv_data;
 	int needHelp = 0;
 	
 	if ((needHelp = help_check(argc, argv))) {
@@ -53,10 +54,17 @@ int cli_setsource(struct backend_conn * conn, int argc, char ** argv) {
 		return 1;
 	}
 	
-	source_data.dst_block = atoi(argv[1]);
-	source_data.dst_input = atoi(argv[2]);
-	source_data.src_block = atoi(argv[3]);
-	source_data.src_output = atoi(argv[4]);
+	if (convert_to_id(conn, argv, &conv_data, INPUT)) {
+		return 1;
+	}
+	source_data.dst_block = conv_data.val_1;
+	source_data.dst_input = conv_data.val_2;
+
+	if (convert_to_id(conn, argv+2, &conv_data, OUTPUT)) {
+		return 1;
+	}
+	source_data.src_block = conv_data.val_1;
+	source_data.src_output = conv_data.val_2;
 
 	if (frontend_setsource(conn, &source_data)) {
 		return 1;