feat: use gnu readline for console input

Only applies to UNIX-like systems. This fixes unicode
input and provides console history.

BallanceMMOCommon/include/role/role.hpp

@@ -19,6 +19,8 @@
 #else
 #include <sys/ioctl.h>
 #include <unistd.h>
+#include <readline/readline.h>
+#include <readline/history.h>
 #endif
 #include <steam/steamnetworkingsockets.h>
 #include <steam/isteamnetworkingutils.h>
@@ -57,6 +59,8 @@ class role {
         GetConsoleMode(GetStdHandle(STD_OUTPUT_HANDLE), &mode);
         SetConsoleMode(GetStdHandle(STD_OUTPUT_HANDLE), mode | ENABLE_VIRTUAL_TERMINAL_PROCESSING);
         std::ignore = _setmode(_fileno(stdin), _O_U16TEXT);
+#else
+        using_history();
 #endif
         init_timestamp_ = SteamNetworkingUtils()->GetLocalTimestamp();
         init_time_t_ = std::chrono::system_clock::to_time_t(std::chrono::system_clock::now());

BallanceMMOCommon/src/utility/console.cpp

@@ -1,5 +1,9 @@
 #include <iostream>
 #include <algorithm>
+#ifndef _WIN32
+#include <readline/readline.h>
+#include <readline/history.h>
+#endif
 #include "utility/console.hpp"
 #include "utility/string_utils.hpp"
 
@@ -43,7 +47,13 @@ bool console::read_input(std::string &buf) {
         buf.erase(pos);
     return success;
 #else
-    return bool(std::getline(std::cin, buf));
+    auto input_cstr = readline("\r> ");
+    if (!input_cstr)
+        return false;
+    buf.assign(input_cstr);
+    add_history(buf.c_str());
+    return std::cin.good();
+    // return bool(std::getline(std::cin, buf));
 #endif
 }
 

BallanceMMOServer/CMakeLists.txt

@@ -66,6 +66,11 @@ target_include_directories(yaml-cpp SYSTEM INTERFACE ${_inc}) # suppress warning
 set_target_properties(GameNetworkingSockets yaml-cpp PROPERTIES
                             LIBRARY_OUTPUT_DIRECTORY ${BMMO_LIB_DIR})
 # set_target_properties(yaml-cpp PROPERTIES VERSION "" SOVERSION "")
+if (NOT WIN32)
+    target_link_libraries(BallanceMMOServer readline)
+    target_link_libraries(BallanceMMOMockClient readline)
+    target_link_libraries(BallanceMMORecordParser readline)
+endif()
 
 if (MSVC)
     set(compile_options /Wall)

README.md

@@ -46,6 +46,7 @@ BallanceMMO is a project which brings online experiences to Ballance.
   - OpenSSL 1.1.x, plus ed25519-donna and curve25519-donna. (Valve GNS has made some minor changes, so the source is included in this project.)
   - libsodium
 - Google protobuf 2.6.1+ (included in submodule)
+- GNU Readline (for UNIX-like systems)
 - Dev pack of BallanceModLoader (client-side, [*release page*](https://github.com/Gamepiaynmo/BallanceModLoader/releases)) and (optionally) [BallanceModLoaderPlus](https://github.com/doyaGu/BallanceModLoaderPlus)
 
 ## Building server
@@ -58,20 +59,22 @@ BallanceMMO is a project which brings online experiences to Ballance.
     git clone https://github.com/Swung0x48/BallanceMMO.git --recursive
     ```
 
-2. Install OpenSSL and protobuf
+2. Install OpenSSL, protobuf, and GNU Readline
 
     - Debian/Ubuntu
 
         ```commandline
         apt install libssl-dev
         apt install libprotobuf-dev protobuf-compiler
+        apt install libreadline-dev
         ```
 
     - Arch
 
         ```commandline
         pacman -S openssl
         pacman -S protobuf
+        pacman -S readline
         ```
 
     - macOS with brew
@@ -80,6 +83,7 @@ BallanceMMO is a project which brings online experiences to Ballance.
         brew install openssl@1.1
         export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/opt/openssl@1.1/lib/pkgconfig
         brew install protobuf
+        brew install readline
         ```
 
     (Haven't tried on a Linux distro with yum as package manager. Sorry Fedora/RHEL/CentOS guys...)