%%%---------------------------------------------------------------------- %%% File : mod_irc.erl %%% Author : Alexey Shchepin %%% Purpose : IRC transport %%% Created : 15 Feb 2003 by Alexey Shchepin %%% %%% %%% ejabberd, Copyright (C) 2002-2009 ProcessOne %%% %%% This program is free software; you can redistribute it and/or %%% modify it under the terms of the GNU General Public License as %%% published by the Free Software Foundation; either version 2 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 %%% General Public License for more details. %%% %%% You should have received a copy of the GNU General Public License %%% along with this program; if not, write to the Free Software %%% Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA %%% 02111-1307 USA %%% %%%---------------------------------------------------------------------- -module(mod_irc). -author('alexey@process-one.net'). -behaviour(gen_server). -behaviour(gen_mod). %% API -export([start_link/2, start/2, stop/1, closed_connection/3, get_user_and_encoding/3]). %% gen_server callbacks -export([init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2, code_change/3]). -include("ejabberd.hrl"). -include("jlib.hrl"). -include("adhoc.hrl"). -define(DEFAULT_IRC_ENCODING, "iso8859-1"). -define(POSSIBLE_ENCODINGS, ["koi8-r", "iso8859-1", "iso8859-2", "utf-8", "utf-8+latin-1"]). -record(irc_connection, {jid_server_host, pid}). -record(irc_custom, {us_host, data}). -record(state, {host, server_host, access}). -define(PROCNAME, ejabberd_mod_irc). %%==================================================================== %% API %%==================================================================== %%-------------------------------------------------------------------- %% Function: start_link() -> {ok,Pid} | ignore | {error,Error} %% Description: Starts the server %%-------------------------------------------------------------------- start_link(Host, Opts) -> Proc = gen_mod:get_module_proc(Host, ?PROCNAME), gen_server:start_link({local, Proc}, ?MODULE, [Host, Opts], []). start(Host, Opts) -> start_supervisor(Host), Proc = gen_mod:get_module_proc(Host, ?PROCNAME), ChildSpec = {Proc, {?MODULE, start_link, [Host, Opts]}, temporary, 1000, worker, [?MODULE]}, supervisor:start_child(ejabberd_sup, ChildSpec). stop(Host) -> stop_supervisor(Host), Proc = gen_mod:get_module_proc(Host, ?PROCNAME), gen_server:call(Proc, stop), supervisor:delete_child(ejabberd_sup, Proc). %%==================================================================== %% gen_server callbacks %%==================================================================== %%-------------------------------------------------------------------- %% Function: init(Args) -> {ok, State} | %% {ok, State, Timeout} | %% ignore | %% {stop, Reason} %% Description: Initiates the server %%-------------------------------------------------------------------- init([Host, Opts]) -> iconv:start(), mnesia:create_table(irc_custom, [{disc_copies, [node()]}, {attributes, record_info(fields, irc_custom)}]), MyHost = gen_mod:get_opt_host(Host, Opts, "irc.@HOST@"), update_table(MyHost), Access = gen_mod:get_opt(access, Opts, all), catch ets:new(irc_connection, [named_table, public, {keypos, #irc_connection.jid_server_host}]), ejabberd_router:register_route(MyHost), {ok, #state{host = MyHost, server_host = Host, access = Access}}. %%-------------------------------------------------------------------- %% Function: %% handle_call(Request, From, State) -> {reply, Reply, State} | %% {reply, Reply, State, Timeout} | %% {noreply, State} | %% {noreply, State, Timeout} | %% {stop, Reason, Reply, State} | %% {stop, Reason, State} %% Description: Handling call messages %%-------------------------------------------------------------------- handle_call(stop, _From, State) -> {stop, normal, ok, State}. %%-------------------------------------------------------------------- %% Function: handle_cast(Msg, State) -> {noreply, State} | %% {noreply, State, Timeout} | %% {stop, Reason, State} %% Description: Handling cast messages %%-------------------------------------------------------------------- handle_cast(_Msg, State) -> {noreply, State}. %%-------------------------------------------------------------------- %% Function: handle_info(Info, State) -> {noreply, State} | %% {noreply, State, Timeout} | %% {stop, Reason, State} %% Description: Handling all non call/cast messages %%-------------------------------------------------------------------- handle_info({route, From, To, Packet}, #state{host = Host, server_host = ServerHost, access = Access} = State) -> case catch do_route(Host, ServerHost, Access, From, To, Packet) of {'EXIT', Reason} -> ?ERROR_MSG("~p", [Reason]); _ -> ok end, {noreply, State}; handle_info(_Info, State) -> {noreply, State}. %%-------------------------------------------------------------------- %% Function: terminate(Reason, State) -> void() %% Description: This function is called by a gen_server when it is about to %% terminate. It should be the opposite of Module:init/1 and do any necessary %% cleaning up. When it returns, the gen_server terminates with Reason. %% The return value is ignored. %%-------------------------------------------------------------------- terminate(_Reason, State) -> ejabberd_router:unregister_route(State#state.host), ok. %%-------------------------------------------------------------------- %% Func: code_change(OldVsn, State, Extra) -> {ok, NewState} %% Description: Convert process state when code is changed %%-------------------------------------------------------------------- code_change(_OldVsn, State, _Extra) -> {ok, State}. %%-------------------------------------------------------------------- %%% Internal functions %%-------------------------------------------------------------------- start_supervisor(Host) -> Proc = gen_mod:get_module_proc(Host, ejabberd_mod_irc_sup), ChildSpec = {Proc, {ejabberd_tmp_sup, start_link, [Proc, mod_irc_connection]}, permanent, infinity, supervisor, [ejabberd_tmp_sup]}, supervisor:start_child(ejabberd_sup, ChildSpec). stop_supervisor(Host) -> Proc = gen_mod:get_module_proc(Host, ejabberd_mod_irc_sup), supervisor:terminate_child(ejabberd_sup, Proc), supervisor:delete_child(ejabberd_sup, Proc). do_route(Host, ServerHost, Access, From, To, Packet) -> case acl:match_rule(ServerHost, Access, From) of allow -> do_route1(Host, ServerHost, From, To, Packet); _ -> {xmlelement, _Name, Attrs, _Els} = Packet, Lang = xml:get_attr_s("xml:lang", Attrs), ErrText = "Access denied by service policy", Err = jlib:make_error_reply(Packet, ?ERRT_FORBIDDEN(Lang, ErrText)), ejabberd_router:route(To, From, Err) end. do_route1(Host, ServerHost, From, To, Packet) -> #jid{user = ChanServ, resource = Resource} = To, {xmlelement, _Name, _Attrs, _Els} = Packet, case ChanServ of "" -> case Resource of "" -> case jlib:iq_query_info(Packet) of #iq{type = get, xmlns = ?NS_DISCO_INFO = XMLNS, sub_el = SubEl, lang = Lang} = IQ -> Node = xml:get_tag_attr_s("node", SubEl), Info = ejabberd_hooks:run_fold( disco_info, ServerHost, [], [ServerHost, ?MODULE, "", ""]), case iq_disco(Node, Lang) of [] -> Res = IQ#iq{type = result, sub_el = [{xmlelement, "query", [{"xmlns", XMLNS}], []}]}, ejabberd_router:route(To, From, jlib:iq_to_xml(Res)); DiscoInfo -> Res = IQ#iq{type = result, sub_el = [{xmlelement, "query", [{"xmlns", XMLNS}], DiscoInfo ++ Info}]}, ejabberd_router:route(To, From, jlib:iq_to_xml(Res)) end; #iq{type = get, xmlns = ?NS_DISCO_ITEMS = XMLNS, sub_el = SubEl, lang = Lang} = IQ -> Node = xml:get_tag_attr_s("node", SubEl), case Node of [] -> ResIQ = IQ#iq{type = result, sub_el = [{xmlelement, "query", [{"xmlns", XMLNS}], []}]}, Res = jlib:iq_to_xml(ResIQ); "join" -> ResIQ = IQ#iq{type = result, sub_el = [{xmlelement, "query", [{"xmlns", XMLNS}], []}]}, Res = jlib:iq_to_xml(ResIQ); "register" -> ResIQ = IQ#iq{type = result, sub_el = [{xmlelement, "query", [{"xmlns", XMLNS}], []}]}, Res = jlib:iq_to_xml(ResIQ); ?NS_COMMANDS -> ResIQ = IQ#iq{type = result, sub_el = [{xmlelement, "query", [{"xmlns", XMLNS}, {"node", Node}], command_items(Host, Lang)}]}, Res = jlib:iq_to_xml(ResIQ); _ -> Res = jlib:make_error_reply( Packet, ?ERR_ITEM_NOT_FOUND) end, ejabberd_router:route(To, From, Res); #iq{xmlns = ?NS_REGISTER} = IQ -> process_register(Host, From, To, IQ); #iq{type = get, xmlns = ?NS_VCARD = XMLNS, lang = Lang} = IQ -> Res = IQ#iq{type = result, sub_el = [{xmlelement, "vCard", [{"xmlns", XMLNS}], iq_get_vcard(Lang)}]}, ejabberd_router:route(To, From, jlib:iq_to_xml(Res)); #iq{type = set, xmlns = ?NS_COMMANDS, lang = _Lang, sub_el = SubEl} = IQ -> Request = adhoc:parse_request(IQ), case lists:keysearch(Request#adhoc_request.node, 1, commands()) of {value, {_, _, Function}} -> case catch Function(From, To, Request) of {'EXIT', Reason} -> ?ERROR_MSG("~p~nfor ad-hoc handler of ~p", [Reason, {From, To, IQ}]), Res = IQ#iq{type = error, sub_el = [SubEl, ?ERR_INTERNAL_SERVER_ERROR]}; ignore -> Res = ignore; {error, Error} -> Res = IQ#iq{type = error, sub_el = [SubEl, Error]}; Command -> Res = IQ#iq{type = result, sub_el = [Command]} end, if Res /= ignore -> ejabberd_router:route(To, From, jlib:iq_to_xml(Res)); true -> ok end; _ -> Err = jlib:make_error_reply( Packet, ?ERR_ITEM_NOT_FOUND), ejabberd_router:route(To, From, Err) end; #iq{} = _IQ -> Err = jlib:make_error_reply( Packet, ?ERR_FEATURE_NOT_IMPLEMENTED), ejabberd_router:route(To, From, Err); _ -> ok end; _ -> Err = jlib:make_error_reply(Packet, ?ERR_BAD_REQUEST), ejabberd_router:route(To, From, Err) end; _ -> case string:tokens(ChanServ, "%") of [[_ | _] = Channel, [_ | _] = Server] -> case ets:lookup(irc_connection, {From, Server, Host}) of [] -> ?DEBUG("open new connection~n", []), {Username, Encoding} = get_user_and_encoding( Host, From, Server), ConnectionUsername = case Packet of %% If the user tries to join a %% chatroom, the packet for sure %% contains the desired username. {xmlelement, "presence", _, _} -> Resource; %% Otherwise, there is no firm %% conclusion from the packet. %% Better to use the configured %% username (which defaults to the %% username part of the JID). _ -> Username end, {ok, Pid} = mod_irc_connection:start( From, Host, ServerHost, Server, ConnectionUsername, Encoding), ets:insert( irc_connection, #irc_connection{jid_server_host = {From, Server, Host}, pid = Pid}), mod_irc_connection:route_chan( Pid, Channel, Resource, Packet), ok; [R] -> Pid = R#irc_connection.pid, ?DEBUG("send to process ~p~n", [Pid]), mod_irc_connection:route_chan( Pid, Channel, Resource, Packet), ok end; _ -> case string:tokens(ChanServ, "!") of [[_ | _] = Nick, [_ | _] = Server] -> case ets:lookup(irc_connection, {From, Server, Host}) of [] -> Err = jlib:make_error_reply( Packet, ?ERR_SERVICE_UNAVAILABLE), ejabberd_router:route(To, From, Err); [R] -> Pid = R#irc_connection.pid, ?DEBUG("send to process ~p~n", [Pid]), mod_irc_connection:route_nick( Pid, Nick, Packet), ok end; _ -> Err = jlib:make_error_reply( Packet, ?ERR_BAD_REQUEST), ejabberd_router:route(To, From, Err) end end end. closed_connection(Host, From, Server) -> ets:delete(irc_connection, {From, Server, Host}). iq_disco([], Lang) -> [{xmlelement, "identity", [{"category", "conference"}, {"type", "irc"}, {"name", translate:translate(Lang, "IRC Transport")}], []}, {xmlelement, "feature", [{"var", ?NS_DISCO_INFO}], []}, {xmlelement, "feature", [{"var", ?NS_MUC}], []}, {xmlelement, "feature", [{"var", ?NS_REGISTER}], []}, {xmlelement, "feature", [{"var", ?NS_VCARD}], []}, {xmlelement, "feature", [{"var", ?NS_COMMANDS}], []}]; iq_disco(Node, Lang) -> case lists:keysearch(Node, 1, commands()) of {value, {_, Name, _}} -> [{xmlelement, "identity", [{"category", "automation"}, {"type", "command-node"}, {"name", translate:translate(Lang, Name)}], []}, {xmlelement, "feature", [{"var", ?NS_COMMANDS}], []}, {xmlelement, "feature", [{"var", ?NS_XDATA}], []}]; _ -> [] end. iq_get_vcard(Lang) -> [{xmlelement, "FN", [], [{xmlcdata, "ejabberd/mod_irc"}]}, {xmlelement, "URL", [], [{xmlcdata, ?EJABBERD_URI}]}, {xmlelement, "DESC", [], [{xmlcdata, translate:translate(Lang, "ejabberd IRC module") ++ "\nCopyright (c) 2003-2009 Alexey Shchepin"}]}]. command_items(Host, Lang) -> lists:map(fun({Node, Name, _Function}) -> {xmlelement, "item", [{"jid", Host}, {"node", Node}, {"name", translate:translate(Lang, Name)}], []} end, commands()). commands() -> [{"join", "Join channel", fun adhoc_join/3}, {"register", "Configure username and encoding", fun adhoc_register/3}]. process_register(Host, From, To, #iq{} = IQ) -> case catch process_irc_register(Host, From, To, IQ) of {'EXIT', Reason} -> ?ERROR_MSG("~p", [Reason]); ResIQ -> if ResIQ /= ignore -> ejabberd_router:route(To, From, jlib:iq_to_xml(ResIQ)); true -> ok end end. find_xdata_el({xmlelement, _Name, _Attrs, SubEls}) -> find_xdata_el1(SubEls). find_xdata_el1([]) -> false; find_xdata_el1([{xmlelement, Name, Attrs, SubEls} | Els]) -> case xml:get_attr_s("xmlns", Attrs) of ?NS_XDATA -> {xmlelement, Name, Attrs, SubEls}; _ -> find_xdata_el1(Els) end; find_xdata_el1([_ | Els]) -> find_xdata_el1(Els). process_irc_register(Host, From, _To, #iq{type = Type, xmlns = XMLNS, lang = Lang, sub_el = SubEl} = IQ) -> case Type of set -> XDataEl = find_xdata_el(SubEl), case XDataEl of false -> IQ#iq{type = error, sub_el = [SubEl, ?ERR_NOT_ACCEPTABLE]}; {xmlelement, _Name, Attrs, _SubEls} -> case xml:get_attr_s("type", Attrs) of "cancel" -> IQ#iq{type = result, sub_el = [{xmlelement, "query", [{"xmlns", XMLNS}], []}]}; "submit" -> XData = jlib:parse_xdata_submit(XDataEl), case XData of invalid -> IQ#iq{type = error, sub_el = [SubEl, ?ERR_BAD_REQUEST]}; _ -> Node = string:tokens( xml:get_tag_attr_s("node", SubEl), "/"), case set_form( Host, From, Node, Lang, XData) of {result, Res} -> IQ#iq{type = result, sub_el = [{xmlelement, "query", [{"xmlns", XMLNS}], Res }]}; {error, Error} -> IQ#iq{type = error, sub_el = [SubEl, Error]} end end; _ -> IQ#iq{type = error, sub_el = [SubEl, ?ERR_BAD_REQUEST]} end end; get -> Node = string:tokens(xml:get_tag_attr_s("node", SubEl), "/"), case get_form(Host, From, Node, Lang) of {result, Res} -> IQ#iq{type = result, sub_el = [{xmlelement, "query", [{"xmlns", XMLNS}], Res }]}; {error, Error} -> IQ#iq{type = error, sub_el = [SubEl, Error]} end end. get_form(Host, From, [], Lang) -> #jid{user = User, server = Server, luser = LUser, lserver = LServer} = From, US = {LUser, LServer}, Customs = case catch mnesia:dirty_read({irc_custom, {US, Host}}) of {'EXIT', _Reason} -> {error, ?ERR_INTERNAL_SERVER_ERROR}; [] -> {User, []}; [#irc_custom{data = Data}] -> {xml:get_attr_s(username, Data), xml:get_attr_s(encodings, Data)} end, case Customs of {error, _Error} -> Customs; {Username, Encodings} -> {result, [{xmlelement, "instructions", [], [{xmlcdata, translate:translate( Lang, "You need an x:data capable client " "to configure mod_irc settings")}]}, {xmlelement, "x", [{"xmlns", ?NS_XDATA}], [{xmlelement, "title", [], [{xmlcdata, translate:translate( Lang, "Registration in mod_irc for ") ++ User ++ "@" ++ Server}]}, {xmlelement, "instructions", [], [{xmlcdata, translate:translate( Lang, "Enter username and encodings you wish to use for " "connecting to IRC servers")}]}, {xmlelement, "field", [{"type", "text-single"}, {"label", translate:translate( Lang, "IRC Username")}, {"var", "username"}], [{xmlelement, "value", [], [{xmlcdata, Username}]}]}, {xmlelement, "field", [{"type", "fixed"}], [{xmlelement, "value", [], [{xmlcdata, lists:flatten( io_lib:format( translate:translate( Lang, "If you want to specify different encodings " "for IRC servers, fill this list with values " "in format '{\"irc server\", \"encoding\"}'. " "By default this service use \"~s\" encoding."), [?DEFAULT_IRC_ENCODING]))}]}]}, {xmlelement, "field", [{"type", "fixed"}], [{xmlelement, "value", [], [{xmlcdata, translate:translate( Lang, "Example: [{\"irc.lucky.net\", \"koi8-r\"}, " "{\"vendetta.fef.net\", \"iso8859-1\"}]." )}]}]}, {xmlelement, "field", [{"type", "text-multi"}, {"label", translate:translate(Lang, "Encodings")}, {"var", "encodings"}], lists:map( fun(S) -> {xmlelement, "value", [], [{xmlcdata, S}]} end, string:tokens( lists:flatten( io_lib:format("~p.", [Encodings])), "\n")) } ]}]} end; get_form(_Host, _, _, _Lang) -> {error, ?ERR_SERVICE_UNAVAILABLE}. set_form(Host, From, [], _Lang, XData) -> {LUser, LServer, _} = jlib:jid_tolower(From), US = {LUser, LServer}, case {lists:keysearch("username", 1, XData), lists:keysearch("encodings", 1, XData)} of {{value, {_, [Username]}}, {value, {_, Strings}}} -> EncString = lists:foldl(fun(S, Res) -> Res ++ S ++ "\n" end, "", Strings), case erl_scan:string(EncString) of {ok, Tokens, _} -> case erl_parse:parse_term(Tokens) of {ok, Encodings} -> case mnesia:transaction( fun() -> mnesia:write( #irc_custom{us_host = {US, Host}, data = [{username, Username}, {encodings, Encodings}]}) end) of {atomic, _} -> {result, []}; _ -> {error, ?ERR_NOT_ACCEPTABLE} end; _ -> {error, ?ERR_NOT_ACCEPTABLE} end; _ -> {error, ?ERR_NOT_ACCEPTABLE} end; _ -> {error, ?ERR_NOT_ACCEPTABLE} end; set_form(_Host, _, _, _Lang, _XData) -> {error, ?ERR_SERVICE_UNAVAILABLE}. get_user_and_encoding(Host, From, IRCServer) -> #jid{user = User, server = _Server, luser = LUser, lserver = LServer} = From, US = {LUser, LServer}, case catch mnesia:dirty_read({irc_custom, {US, Host}}) of {'EXIT', _Reason} -> {User, ?DEFAULT_IRC_ENCODING}; [] -> {User, ?DEFAULT_IRC_ENCODING}; [#irc_custom{data = Data}] -> {xml:get_attr_s(username, Data), case xml:get_attr_s(IRCServer, xml:get_attr_s(encodings, Data)) of "" -> ?DEFAULT_IRC_ENCODING; E -> E end} end. adhoc_join(_From, _To, #adhoc_request{action = "cancel"} = Request) -> adhoc:produce_response(Request, #adhoc_response{status = canceled}); adhoc_join(From, To, #adhoc_request{lang = Lang, node = _Node, action = _Action, xdata = XData} = Request) -> %% Access control has already been taken care of in do_route. if XData == false -> Form = {xmlelement, "x", [{"xmlns", ?NS_XDATA}, {"type", "form"}], [{xmlelement, "title", [], [{xmlcdata, translate:translate(Lang, "Join IRC channel")}]}, {xmlelement, "field", [{"var", "channel"}, {"type", "text-single"}, {"label", translate:translate(Lang, "IRC channel (don't put the first #)")}], [{xmlelement, "required", [], []}]}, {xmlelement, "field", [{"var", "server"}, {"type", "text-single"}, {"label", translate:translate(Lang, "IRC server")}], [{xmlelement, "required", [], []}]}]}, adhoc:produce_response(Request, #adhoc_response{status = executing, elements = [Form]}); true -> case jlib:parse_xdata_submit(XData) of invalid -> {error, ?ERR_BAD_REQUEST}; Fields -> Channel = case lists:keysearch("channel", 1, Fields) of {value, {"channel", C}} -> C; _ -> false end, Server = case lists:keysearch("server", 1, Fields) of {value, {"server", S}} -> S; _ -> false end, if Channel /= false, Server /= false -> RoomJID = Channel ++ "%" ++ Server ++ "@" ++ To#jid.server, Invite = {xmlelement, "message", [], [{xmlelement, "x", [{"xmlns", ?NS_MUC_USER}], [{xmlelement, "invite", [{"from", jlib:jid_to_string(From)}], [{xmlelement, "reason", [], [{xmlcdata, translate:translate(Lang, "Join the IRC channel here.")}]}]}]}, {xmlelement, "x", [{"xmlns", ?NS_XCONFERENCE}], [{xmlcdata, translate:translate(Lang, "Join the IRC channel here.")}]}, {xmlelement, "body", [], [{xmlcdata, io_lib:format( translate:translate(Lang, "Join the IRC channel in this Jabber ID: ~s"), [RoomJID])}]}]}, ejabberd_router:route(jlib:string_to_jid(RoomJID), From, Invite), adhoc:produce_response(Request, #adhoc_response{status = completed}); true -> {error, ?ERR_BAD_REQUEST} end end end. adhoc_register(_From, _To, #adhoc_request{action = "cancel"} = Request) -> adhoc:produce_response(Request, #adhoc_response{status = canceled}); adhoc_register(From, To, #adhoc_request{lang = Lang, node = _Node, xdata = XData, action = Action} = Request) -> #jid{user = User, luser = LUser, lserver = LServer} = From, #jid{lserver = Host} = To, US = {LUser, LServer}, %% Generate form for setting username and encodings. If the user %% hasn't begun to fill out the form, generate an initial form %% based on current values. if XData == false -> case catch mnesia:dirty_read({irc_custom, {US, Host}}) of {'EXIT', _Reason} -> Username = User, Encodings = []; [] -> Username = User, Encodings = []; [#irc_custom{data = Data}] -> Username = xml:get_attr_s(username, Data), Encodings = xml:get_attr_s(encodings, Data) end, Error = false; true -> case jlib:parse_xdata_submit(XData) of invalid -> Error = {error, ?ERR_BAD_REQUEST}, Username = false, Encodings = false; Fields -> Username = case lists:keysearch("username", 1, Fields) of {value, {"username", U}} -> U; _ -> User end, Encodings = parse_encodings(Fields), Error = false end end, if Error /= false -> Error; Action == "complete" -> case mnesia:transaction( fun () -> mnesia:write( #irc_custom{us_host = {US, Host}, data = [{username, Username}, {encodings, Encodings}]}) end) of {atomic, _} -> adhoc:produce_response(Request, #adhoc_response{status = completed}); _ -> {error, ?ERR_INTERNAL_SERVER_ERROR} end; true -> Form = generate_adhoc_register_form(Lang, Username, Encodings), adhoc:produce_response(Request, #adhoc_response{status = executing, elements = [Form], actions = ["next", "complete"]}) end. generate_adhoc_register_form(Lang, Username, Encodings) -> {xmlelement, "x", [{"xmlns", ?NS_XDATA}, {"type", "form"}], [{xmlelement, "title", [], [{xmlcdata, translate:translate(Lang, "IRC settings")}]}, {xmlelement, "instructions", [], [{xmlcdata, translate:translate( Lang, "Enter username and encodings you wish to use for " "connecting to IRC servers. Press 'Next' to get more fields " "to fill in. Press 'Complete' to save settings.")}]}, {xmlelement, "field", [{"var", "username"}, {"type", "text-single"}, {"label", translate:translate(Lang, "IRC username")}], [{xmlelement, "required", [], []}, {xmlelement, "value", [], [{xmlcdata, Username}]}]}] ++ generate_encoding_fields(Lang, Encodings, 1, [])}. generate_encoding_fields(Lang, [], Number, Acc) -> Field = generate_encoding_field(Lang, "", "", Number), lists:reverse(Field ++ Acc); generate_encoding_fields(Lang, [{Server, Encoding} | Encodings], Number, Acc) -> Field = generate_encoding_field(Lang, Server, Encoding, Number), generate_encoding_fields(Lang, Encodings, Number + 1, Field ++ Acc). generate_encoding_field(Lang, Server, Encoding, Number) -> EncodingUsed = case Encoding of [] -> ?DEFAULT_IRC_ENCODING; _ -> Encoding end, %% Fields are in reverse order, as they will be reversed again later. [{xmlelement, "field", [{"var", "encoding" ++ io_lib:format("~b", [Number])}, {"type", "list-single"}, {"label", io_lib:format(translate:translate(Lang, "Encoding for server ~b"), [Number])}], [{xmlelement, "value", [], [{xmlcdata, EncodingUsed}]} | lists:map(fun(E) -> {xmlelement, "option", [{"label", E}], [{xmlelement, "value", [], [{xmlcdata, E}]}]} end, ?POSSIBLE_ENCODINGS)]}, {xmlelement, "field", [{"var", "server" ++ io_lib:format("~b", [Number])}, {"type", "text-single"}, {"label", io_lib:format(translate:translate(Lang, "Server ~b"), [Number])}], [{xmlelement, "value", [], [{xmlcdata, Server}]}]}]. parse_encodings(Fields) -> %% Find all fields staring with serverN and encodingN, for any values %% of N, and generate lists of {"N", Value}. Servers = lists:sort( [{lists:nthtail(6, Var), lists:flatten(Value)} || {Var, Value} <- Fields, lists:prefix("server", Var)]), Encodings = lists:sort( [{lists:nthtail(8, Var), lists:flatten(Value)} || {Var, Value} <- Fields, lists:prefix("encoding", Var)]), %% Now sort the lists, and find the corresponding pairs. parse_encodings(Servers, Encodings). parse_encodings([{ServerN, Server} | Servers], [{EncodingN, Encoding} | Encodings]) -> %% Try to match pairs of servers and encodings, no matter what fields %% the client might have left out. if ServerN == EncodingN -> [{Server, Encoding} | parse_encodings(Servers, Encodings)]; ServerN < EncodingN -> parse_encodings(Servers, [{EncodingN, Encoding} | Encodings]); ServerN > EncodingN -> parse_encodings([{ServerN, Server} | Servers], Encodings) end; parse_encodings([], _) -> []; parse_encodings(_, []) -> []. update_table(Host) -> Fields = record_info(fields, irc_custom), case mnesia:table_info(irc_custom, attributes) of Fields -> ok; [userserver, data] -> ?INFO_MSG("Converting irc_custom table from " "{userserver, data} format", []), {atomic, ok} = mnesia:create_table( mod_irc_tmp_table, [{disc_only_copies, [node()]}, {type, bag}, {local_content, true}, {record_name, irc_custom}, {attributes, record_info(fields, irc_custom)}]), mnesia:transform_table(irc_custom, ignore, Fields), F1 = fun() -> mnesia:write_lock_table(mod_irc_tmp_table), mnesia:foldl( fun(#irc_custom{us_host = US} = R, _) -> mnesia:dirty_write( mod_irc_tmp_table, R#irc_custom{us_host = {US, Host}}) end, ok, irc_custom) end, mnesia:transaction(F1), mnesia:clear_table(irc_custom), F2 = fun() -> mnesia:write_lock_table(irc_custom), mnesia:foldl( fun(R, _) -> mnesia:dirty_write(R) end, ok, mod_irc_tmp_table) end, mnesia:transaction(F2), mnesia:delete_table(mod_irc_tmp_table); _ -> ?INFO_MSG("Recreating irc_custom table", []), mnesia:transform_table(irc_custom, ignore, Fields) end.