1 files changed, 76 insertions, 0 deletions
diff --git a/src/script/api/script_sign.cpp b/src/script/api/script_sign.cpp
new file mode 100644
index 000000000..2178f3846
--- /dev/null
+++ b/src/script/api/script_sign.cpp
@@ -0,0 +1,76 @@
+/* $Id$ */
+
+/*
+ * This file is part of OpenTTD.
+ * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
+ * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** @file script_sign.cpp Implementation of AISign. */
+
+#include "../../stdafx.h"
+#include "script_sign.hpp"
+#include "table/strings.h"
+#include "../../ai/ai_instance.hpp"
+#include "../../command_func.h"
+#include "../../core/alloc_func.hpp"
+#include "../../signs_base.h"
+#include "../../string_func.h"
+#include "../../strings_func.h"
+#include "../../tile_map.h"
+#include "../../company_func.h"
+
+/* static */ bool AISign::IsValidSign(SignID sign_id)
+{
+	const Sign *si = ::Sign::GetIfValid(sign_id);
+	return si != NULL && si->owner == _current_company;
+}
+
+/* static */ bool AISign::SetName(SignID sign_id, const char *name)
+{
+	EnforcePrecondition(false, IsValidSign(sign_id));
+	EnforcePrecondition(false, !::StrEmpty(name));
+	EnforcePreconditionCustomError(false, ::Utf8StringLength(name) < MAX_LENGTH_SIGN_NAME_CHARS, AIError::ERR_PRECONDITION_STRING_TOO_LONG);
+
+	return AIObject::DoCommand(0, sign_id, 0, CMD_RENAME_SIGN, name);
+}
+
+/* static */ char *AISign::GetName(SignID sign_id)
+{
+	if (!IsValidSign(sign_id)) return NULL;
+
+	static const int len = 64;
+	char *sign_name = MallocT<char>(len);
+
+	::SetDParam(0, sign_id);
+	::GetString(sign_name, STR_SIGN_NAME, &sign_name[len - 1]);
+
+	return sign_name;
+}
+
+/* static */ TileIndex AISign::GetLocation(SignID sign_id)
+{
+	if (!IsValidSign(sign_id)) return INVALID_TILE;
+
+	const Sign *sign = ::Sign::Get(sign_id);
+	return ::TileVirtXY(sign->x, sign->y);
+}
+
+/* static */ bool AISign::RemoveSign(SignID sign_id)
+{
+	EnforcePrecondition(false, IsValidSign(sign_id));
+	return AIObject::DoCommand(0, sign_id, 0, CMD_RENAME_SIGN, "");
+}
+
+/* static */ SignID AISign::BuildSign(TileIndex location, const char *text)
+{
+	EnforcePrecondition(INVALID_SIGN, ::IsValidTile(location));
+	EnforcePrecondition(INVALID_SIGN, !::StrEmpty(text));
+	EnforcePreconditionCustomError(false, ::Utf8StringLength(text) < MAX_LENGTH_SIGN_NAME_CHARS, AIError::ERR_PRECONDITION_STRING_TOO_LONG);
+
+	if (!AIObject::DoCommand(location, 0, 0, CMD_PLACE_SIGN, text, &AIInstance::DoCommandReturnSignID)) return INVALID_SIGN;
+
+	/* In case of test-mode, we return SignID 0 */
+	return 0;
+}