1 files changed, 73 insertions, 0 deletions
diff --git a/src/ai/api/ai_sign.cpp b/src/ai/api/ai_sign.cpp
new file mode 100644
index 000000000..561b5c857
--- /dev/null
+++ b/src/ai/api/ai_sign.cpp
@@ -0,0 +1,73 @@
+/* $Id$ */
+
+/** @file ai_sign.cpp Implementation of AISign. */
+
+#include "ai_sign.hpp"
+#include "table/strings.h"
+#include "../ai_instance.hpp"
+#include "../../openttd.h"
+#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 */ SignID AISign::GetMaxSignID()
+{
+	return ::GetMaxSignIndex();
+}
+
+/* static */ bool AISign::IsValidSign(SignID sign_id)
+{
+	return ::IsValidSignID(sign_id) && ::GetSign(sign_id)->owner == _current_company;
+}
+
+/* static */ bool AISign::SetName(SignID sign_id, const char *name)
+{
+	EnforcePrecondition(false, IsValidSign(sign_id));
+	EnforcePrecondition(false, !::StrEmpty(name));
+	EnforcePreconditionCustomError(false, ::strlen(name) < MAX_LENGTH_SIGN_NAME_BYTES, AIError::ERR_PRECONDITION_STRING_TOO_LONG);
+
+	return AIObject::DoCommand(0, sign_id, 0, CMD_RENAME_SIGN, name);
+}
+
+/* static */ const 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 = ::GetSign(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, ::strlen(text) < MAX_LENGTH_SIGN_NAME_BYTES, 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;
+}