Add server side ncurses terminal

This adds a chat console the server owner can use for administration
or to talk with players.
It runs in its own thread, which makes the user interface immune to
the server's lag, behaving just like a client, except timeout.
As it uses the same console code as the f10 console, things like nick
completion or a scroll buffer basically come for free.
The terminal itself is written in a general way so that adding a
client version later on is just about implementing an interface.

Fatal errors are printed after the console exists and the ncurses
terminal buffer gets cleaned up with endwin(), so that the error still
remains visible.

The server owner can chose their username their entered text will
have in chat and where players can send PMs to.
Once the username is secured with a password to prevent anybody to
take over the server, the owner can execute admin tasks over the
console.

This change includes a contribution by @kahrl who has improved ncurses
library detection.

1 files changed, 22 insertions, 1 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 72b52436c..55f5d4ad8 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -160,6 +160,20 @@ find_package(Lua REQUIRED)
 
 find_package(GMP REQUIRED)
 
+option(ENABLE_CURSES "Enable ncurses console" TRUE)
+set(USE_CURSES FALSE)
+
+if(ENABLE_CURSES)
+	find_package(Ncursesw)
+	if(CURSES_FOUND)
+		set(USE_CURSES TRUE)
+		message(STATUS "ncurses console enabled.")
+		include_directories(${CURSES_INCLUDE_DIRS})
+	else()
+		message(STATUS "ncurses not found!")
+	endif()
+endif(ENABLE_CURSES)
+
 option(ENABLE_LEVELDB "Enable LevelDB backend" TRUE)
 set(USE_LEVELDB FALSE)
 
@@ -322,6 +336,7 @@ set(common_SRCS
 	areastore.cpp
 	ban.cpp
 	cavegen.cpp
+	chat.cpp
 	clientiface.cpp
 	collision.cpp
 	content_abm.cpp
@@ -387,6 +402,7 @@ set(common_SRCS
 	sound.cpp
 	staticobject.cpp
 	subgame.cpp
+	terminal_chat_console.cpp
 	tool.cpp
 	treegen.cpp
 	version.cpp
@@ -431,7 +447,6 @@ set(client_SRCS
 	${sound_SRCS}
 	${client_network_SRCS}
 	camera.cpp
-	chat.cpp
 	client.cpp
 	clientmap.cpp
 	clientmedia.cpp
@@ -558,6 +573,9 @@ if(BUILD_CLIENT)
 			${CGUITTFONT_LIBRARY}
 		)
 	endif()
+	if (USE_CURSES)
+		target_link_libraries(${PROJECT_NAME} ${CURSES_LIBRARIES})
+	endif()
 	if (USE_LEVELDB)
 		target_link_libraries(${PROJECT_NAME} ${LEVELDB_LIBRARY})
 	endif()
@@ -585,6 +603,9 @@ if(BUILD_SERVER)
 	)
 	set_target_properties(${PROJECT_NAME}server PROPERTIES
 			COMPILE_DEFINITIONS "SERVER")
+	if (USE_CURSES)
+		target_link_libraries(${PROJECT_NAME}server ${CURSES_LIBRARIES})
+	endif()
 	if (USE_LEVELDB)
 		target_link_libraries(${PROJECT_NAME}server ${LEVELDB_LIBRARY})
 	endif()