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authorLoïc Blot <nerzhul@users.noreply.github.com>2017-09-26 00:11:20 +0200
committerGitHub <noreply@github.com>2017-09-26 00:11:20 +0200
commit6f1c90720402415b62fb4d5e809ec7dbc1cd7f96 (patch)
tree6f94c2bbc2d343be50945a0074bc16da282a4bc1 /src/script/lua_api/l_modchannels.cpp
parent6df312a608912b3cb21d04532151e29e8b0c7301 (diff)
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Implement mod communication channels (#6351)
Implement network communication for channels * Implement ModChannel manager server side to route incoming messages from clients to other clients * Add signal handler switch on client & ModChannelMgr on client to handle channels * Add Lua API bindings + client packet sending + unittests * Implement server message sending * Add callback from received message handler to Lua API using registration method
Diffstat (limited to 'src/script/lua_api/l_modchannels.cpp')
-rw-r--r--src/script/lua_api/l_modchannels.cpp161
1 files changed, 161 insertions, 0 deletions
diff --git a/src/script/lua_api/l_modchannels.cpp b/src/script/lua_api/l_modchannels.cpp
new file mode 100644
index 000000000..ac28e2ada
--- /dev/null
+++ b/src/script/lua_api/l_modchannels.cpp
@@ -0,0 +1,161 @@
+/*
+Minetest
+Copyright (C) 2017 nerzhul, Loic Blot <loic.blot@unix-experience.fr>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+This program 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 Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include <cassert>
+#include <log.h>
+#include "lua_api/l_modchannels.h"
+#include "l_internal.h"
+#include "modchannels.h"
+
+int ModApiChannels::l_mod_channel_join(lua_State *L)
+{
+ if (!lua_isstring(L, 1))
+ return 0;
+
+ std::string channel = luaL_checkstring(L, 1);
+ if (channel.empty())
+ return 0;
+
+ getGameDef(L)->joinModChannel(channel);
+ ModChannel *channelObj = getGameDef(L)->getModChannel(channel);
+ assert(channelObj);
+ ModChannelRef::create(L, channelObj);
+
+ int object = lua_gettop(L);
+ lua_pushvalue(L, object);
+ return 1;
+}
+
+void ModApiChannels::Initialize(lua_State *L, int top)
+{
+ API_FCT(mod_channel_join);
+}
+
+/*
+ * ModChannelRef
+ */
+
+ModChannelRef::ModChannelRef(ModChannel *modchannel) : m_modchannel(modchannel)
+{
+}
+
+int ModChannelRef::l_leave(lua_State *L)
+{
+ ModChannelRef *ref = checkobject(L, 1);
+ ModChannel *channel = getobject(ref);
+ if (!channel)
+ return 0;
+
+ getGameDef(L)->leaveModChannel(channel->getName());
+ // Channel left, invalidate the channel object ptr
+ // This permits to invalidate every object action from Lua because core removed
+ // channel consuming link
+ ref->m_modchannel = nullptr;
+ return 0;
+}
+
+int ModChannelRef::l_send_all(lua_State *L)
+{
+ ModChannelRef *ref = checkobject(L, 1);
+ ModChannel *channel = getobject(ref);
+ if (!channel || !channel->canWrite())
+ return 0;
+
+ // @TODO serialize message
+ std::string message = luaL_checkstring(L, 2);
+
+ getGameDef(L)->sendModChannelMessage(channel->getName(), message);
+ return 0;
+}
+
+int ModChannelRef::l_is_writeable(lua_State *L)
+{
+ ModChannelRef *ref = checkobject(L, 1);
+ ModChannel *channel = getobject(ref);
+ if (!channel)
+ return 0;
+
+ lua_pushboolean(L, channel->canWrite());
+ return 1;
+}
+void ModChannelRef::Register(lua_State *L)
+{
+ lua_newtable(L);
+ int methodtable = lua_gettop(L);
+ luaL_newmetatable(L, className);
+ int metatable = lua_gettop(L);
+
+ lua_pushliteral(L, "__metatable");
+ lua_pushvalue(L, methodtable);
+ lua_settable(L, metatable); // hide metatable from lua getmetatable()
+
+ lua_pushliteral(L, "__index");
+ lua_pushvalue(L, methodtable);
+ lua_settable(L, metatable);
+
+ lua_pushliteral(L, "__gc");
+ lua_pushcfunction(L, gc_object);
+ lua_settable(L, metatable);
+
+ lua_pop(L, 1); // Drop metatable
+
+ luaL_openlib(L, 0, methods, 0); // fill methodtable
+ lua_pop(L, 1); // Drop methodtable
+}
+
+void ModChannelRef::create(lua_State *L, ModChannel *channel)
+{
+ ModChannelRef *o = new ModChannelRef(channel);
+ *(void **)(lua_newuserdata(L, sizeof(void *))) = o;
+ luaL_getmetatable(L, className);
+ lua_setmetatable(L, -2);
+}
+
+int ModChannelRef::gc_object(lua_State *L)
+{
+ ModChannelRef *o = *(ModChannelRef **)(lua_touserdata(L, 1));
+ delete o;
+ return 0;
+}
+
+ModChannelRef *ModChannelRef::checkobject(lua_State *L, int narg)
+{
+ luaL_checktype(L, narg, LUA_TUSERDATA);
+
+ void *ud = luaL_checkudata(L, narg, className);
+ if (!ud)
+ luaL_typerror(L, narg, className);
+
+ return *(ModChannelRef **)ud; // unbox pointer
+}
+
+ModChannel *ModChannelRef::getobject(ModChannelRef *ref)
+{
+ return ref->m_modchannel;
+}
+
+// clang-format off
+const char ModChannelRef::className[] = "ModChannelRef";
+const luaL_Reg ModChannelRef::methods[] = {
+ luamethod(ModChannelRef, leave),
+ luamethod(ModChannelRef, is_writeable),
+ luamethod(ModChannelRef, send_all),
+ {0, 0},
+};
+// clang-format on