degesch: expose channels and users to Lua
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parent
29418e5e55
commit
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GPG Key ID:
B715679E3A361BE6
221
degesch.c
221
degesch.c
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@ -8322,6 +8322,183 @@ lua_plugin_parse (lua_State *L)
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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#define XLUA_USER_METATABLE "user" ///< Identifier for the Lua metatable
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struct lua_user
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{
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struct lua_plugin *plugin; ///< The plugin we belong to
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struct user *user; ///< The user
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struct weak_ref_link *weak_ref; ///< A weak reference link
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};
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static void
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lua_user_invalidate (void *object, void *user_data)
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{
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struct lua_user *wrapper = user_data;
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wrapper->user = NULL;
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wrapper->weak_ref = NULL;
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// This can in theory call the GC, order isn't arbitrary here
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lua_cache_invalidate (wrapper->plugin->L, object);
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}
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static void
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lua_plugin_push_user (struct lua_plugin *plugin, struct user *user)
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{
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lua_State *L = plugin->L;
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if (lua_cache_get (L, user))
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return;
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struct lua_user *wrapper = lua_newuserdata (L, sizeof *wrapper);
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luaL_setmetatable (L, XLUA_USER_METATABLE);
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wrapper->plugin = plugin;
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wrapper->user = user;
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wrapper->weak_ref = user_weak_ref (user, lua_user_invalidate, wrapper);
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lua_cache_store (L, user, -1);
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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/// Identifier for the Lua metatable
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#define XLUA_CHANNEL_METATABLE "channel"
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struct lua_channel
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{
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struct lua_plugin *plugin; ///< The plugin we belong to
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struct channel *channel; ///< The channel
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struct weak_ref_link *weak_ref; ///< A weak reference link
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};
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static void
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lua_channel_invalidate (void *object, void *user_data)
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{
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struct lua_channel *wrapper = user_data;
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wrapper->channel = NULL;
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wrapper->weak_ref = NULL;
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// This can in theory call the GC, order isn't arbitrary here
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lua_cache_invalidate (wrapper->plugin->L, object);
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}
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static void
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lua_plugin_push_channel (struct lua_plugin *plugin, struct channel *channel)
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{
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lua_State *L = plugin->L;
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if (lua_cache_get (L, channel))
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return;
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struct lua_channel *wrapper = lua_newuserdata (L, sizeof *wrapper);
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luaL_setmetatable (L, XLUA_CHANNEL_METATABLE);
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wrapper->plugin = plugin;
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wrapper->channel = channel;
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wrapper->weak_ref = channel_weak_ref
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(channel, lua_channel_invalidate, wrapper);
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lua_cache_store (L, channel, -1);
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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static int
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lua_user_gc (lua_State *L)
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{
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struct lua_user *wrapper = luaL_checkudata (L, 1, XLUA_USER_METATABLE);
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if (wrapper->user)
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{
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lua_cache_invalidate (L, wrapper->user);
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user_weak_unref (wrapper->user, &wrapper->weak_ref);
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wrapper->user = NULL;
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}
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return 0;
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}
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static int
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lua_user_get_nickname (lua_State *L)
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{
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struct lua_user *wrapper = luaL_checkudata (L, 1, XLUA_USER_METATABLE);
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luaL_argcheck (L, wrapper->user, 1, "dead reference used");
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lua_pushstring (L, wrapper->user->nickname);
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return 1;
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}
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static int
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lua_user_get_channels (lua_State *L)
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{
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struct lua_user *wrapper = luaL_checkudata (L, 1, XLUA_USER_METATABLE);
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luaL_argcheck (L, wrapper->user, 1, "dead reference used");
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int i = 1;
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lua_newtable (L);
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LIST_FOR_EACH (struct user_channel, iter, wrapper->user->channels)
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{
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lua_plugin_push_channel (wrapper->plugin, iter->channel);
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lua_rawseti (L, -2, i++);
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}
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return 1;
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}
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static luaL_Reg lua_user_table[] =
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{
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{ "__gc", lua_user_gc },
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{ "get_nickname", lua_user_get_nickname },
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{ "get_channels", lua_user_get_channels },
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{ NULL, NULL }
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};
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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static int
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lua_channel_gc (lua_State *L)
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{
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struct lua_channel *wrapper =
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luaL_checkudata (L, 1, XLUA_CHANNEL_METATABLE);
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if (wrapper->channel)
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{
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lua_cache_invalidate (L, wrapper->channel);
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channel_weak_unref (wrapper->channel, &wrapper->weak_ref);
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wrapper->channel = NULL;
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}
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return 0;
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}
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static int
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lua_channel_get_name (lua_State *L)
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{
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struct lua_channel *wrapper =
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luaL_checkudata (L, 1, XLUA_CHANNEL_METATABLE);
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luaL_argcheck (L, wrapper->channel, 1, "dead reference used");
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lua_pushstring (L, wrapper->channel->name);
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return 1;
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}
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static int
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lua_channel_get_users (lua_State *L)
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{
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struct lua_channel *wrapper =
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luaL_checkudata (L, 1, XLUA_CHANNEL_METATABLE);
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luaL_argcheck (L, wrapper->channel, 1, "dead reference used");
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int i = 1;
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lua_newtable (L);
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LIST_FOR_EACH (struct channel_user, iter, wrapper->channel->users)
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{
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lua_createtable (L, 0, 2);
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lua_plugin_push_user (wrapper->plugin, iter->user);
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lua_setfield (L, -2, "user");
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lua_plugin_kv (L, "prefixes", iter->prefixes.str);
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lua_rawseti (L, -2, i++);
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}
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return 1;
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}
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static luaL_Reg lua_channel_table[] =
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{
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{ "__gc", lua_channel_gc },
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{ "get_name", lua_channel_get_name },
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{ "get_users", lua_channel_get_users },
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{ NULL, NULL }
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};
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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#define XLUA_BUFFER_METATABLE "buffer" ///< Identifier for the Lua metatable
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struct lua_buffer
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@ -8409,6 +8586,32 @@ lua_buffer_gc (lua_State *L)
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return 0;
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}
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static int
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lua_buffer_get_user (lua_State *L)
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{
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struct lua_buffer *wrapper = luaL_checkudata (L, 1, XLUA_BUFFER_METATABLE);
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luaL_argcheck (L, wrapper->buffer, 1, "dead reference used");
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if (wrapper->buffer->user)
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lua_plugin_push_user (wrapper->plugin, wrapper->buffer->user);
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else
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lua_pushnil (L);
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return 1;
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}
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static int
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lua_buffer_get_channel (lua_State *L)
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{
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struct lua_buffer *wrapper = luaL_checkudata (L, 1, XLUA_BUFFER_METATABLE);
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luaL_argcheck (L, wrapper->buffer, 1, "dead reference used");
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if (wrapper->buffer->channel)
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lua_plugin_push_channel (wrapper->plugin, wrapper->buffer->channel);
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else
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lua_pushnil (L);
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return 1;
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}
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static int
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lua_buffer_get_server (lua_State *L)
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{
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@ -8451,6 +8654,8 @@ static luaL_Reg lua_buffer_table[] =
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{
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// TODO: some useful methods or values
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{ "__gc", lua_buffer_gc },
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{ "get_user", lua_buffer_get_user },
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{ "get_channel", lua_buffer_get_channel },
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{ "get_server", lua_buffer_get_server },
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{ "log", lua_buffer_log },
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{ "execute", lua_buffer_execute },
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@ -8472,6 +8677,19 @@ lua_server_gc (lua_State *L)
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return 0;
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}
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static int
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lua_server_get_user (lua_State *L)
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{
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struct lua_server *wrapper = luaL_checkudata (L, 1, XLUA_SERVER_METATABLE);
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luaL_argcheck (L, wrapper->server, 1, "dead reference used");
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if (wrapper->server->irc_user)
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lua_plugin_push_user (wrapper->plugin, wrapper->server->irc_user);
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else
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lua_pushnil (L);
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return 1;
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}
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static int
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lua_server_get_buffer (lua_State *L)
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{
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@ -8500,6 +8718,7 @@ static luaL_Reg lua_server_table[] =
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{
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// TODO: some useful methods or values
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{ "__gc", lua_server_gc },
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{ "get_user", lua_server_get_user },
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{ "get_buffer", lua_server_get_buffer },
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{ "send", lua_server_send },
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{ NULL, NULL }
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@ -9631,6 +9850,8 @@ lua_plugin_load (struct app_context *ctx, const char *filename,
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// Create metatables for our objects
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lua_plugin_create_meta (L, XLUA_HOOK_METATABLE, lua_hook_table);
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lua_plugin_create_meta (L, XLUA_USER_METATABLE, lua_user_table);
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lua_plugin_create_meta (L, XLUA_CHANNEL_METATABLE, lua_channel_table);
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lua_plugin_create_meta (L, XLUA_BUFFER_METATABLE, lua_buffer_table);
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lua_plugin_create_meta (L, XLUA_SERVER_METATABLE, lua_server_table);
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lua_plugin_create_meta (L, XLUA_SCHEMA_METATABLE, lua_schema_table);
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