plugins/mod_roster.lua

   1 -- Prosody IM
   2 -- Copyright (C) 2008-2010 Matthew Wild
   3 -- Copyright (C) 2008-2010 Waqas Hussain
   4 --
   5 -- This project is MIT/X11 licensed. Please see the
   6 -- COPYING file in the source package for more information.
   7 --
   8
   9
  10
  11 local st = require "util.stanza"
  12
  13 local jid_split = require "util.jid".split;
  14 local jid_prep = require "util.jid".prep;
  15 local t_concat = table.concat;
  16 local tostring = tostring;
  17
  18 local rm_remove_from_roster = require "core.rostermanager".remove_from_roster;
  19 local rm_add_to_roster = require "core.rostermanager".add_to_roster;
  20 local rm_roster_push = require "core.rostermanager".roster_push;
  21 local core_post_stanza = core_post_stanza;
  22
  23 module:add_feature("jabber:iq:roster");
  24
  25 local rosterver_stream_feature = st.stanza("ver", {xmlns="urn:xmpp:features:rosterver"}):tag("optional"):up();
  26 module:hook("stream-features", function(event)
  27         local origin, features = event.origin, event.features;
  28         if origin.username then
  29                 features:add_child(rosterver_stream_feature);
  30         end
  31 end);
  32
  33 module:add_iq_handler("c2s", "jabber:iq:roster",
  34                 function (session, stanza)
  35                         if stanza.tags[1].name == "query" then
  36                                 if stanza.attr.type == "get" then
  37                                         local roster = st.reply(stanza);
  38
  39                                         local client_ver = tonumber(stanza.tags[1].attr.ver);
  40                                         local server_ver = tonumber(session.roster[false].version or 1);
  41
  42                                         if not (client_ver and server_ver) or client_ver ~= server_ver then
  43                                                 roster:query("jabber:iq:roster");
  44                                                 -- Client does not support versioning, or has stale roster
  45                                                 for jid in pairs(session.roster) do
  46                                                         if jid ~= "pending" and jid then
  47                                                                 roster:tag("item", {
  48                                                                         jid = jid,
  49                                                                         subscription = session.roster[jid].subscription,
  50                                                                         ask = session.roster[jid].ask,
  51                                                                         name = session.roster[jid].name,
  52                                                                 });
  53                                                                 for group in pairs(session.roster[jid].groups) do
  54                                                                         roster:tag("group"):text(group):up();
  55                                                                 end
  56                                                                 roster:up(); -- move out from item
  57                                                         end
  58                                                 end
  59                                                 roster.tags[1].attr.ver = server_ver;
  60                                         end
  61                                         session.send(roster);
  62                                         session.interested = true; -- resource is interested in roster updates
  63                                         return true;
  64                                 elseif stanza.attr.type == "set" then
  65                                         local query = stanza.tags[1];
  66                                         if #query.tags == 1 and query.tags[1].name == "item"
  67                                                         and query.tags[1].attr.xmlns == "jabber:iq:roster" and query.tags[1].attr.jid
  68                                                         -- Protection against overwriting roster.pending, until we move it
  69                                                         and query.tags[1].attr.jid ~= "pending" then
  70                                                 local item = query.tags[1];
  71                                                 local from_node, from_host = jid_split(stanza.attr.from);
  72                                                 local from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID
  73                                                 local jid = jid_prep(item.attr.jid);
  74                                                 local node, host, resource = jid_split(jid);
  75                                                 if not resource and host then
  76                                                         if jid ~= from_node.."@"..from_host then
  77                                                                 if item.attr.subscription == "remove" then
  78                                                                         local roster = session.roster;
  79                                                                         local r_item = roster[jid];
  80                                                                         if r_item then
  81                                                                                 local to_bare = node and (node.."@"..host) or host; -- bare JID
  82                                                                                 if r_item.subscription == "both" or r_item.subscription == "from" or (roster.pending and roster.pending[jid]) then
  83                                                                                         core_post_stanza(session, st.presence({type="unsubscribed", from=session.full_jid, to=to_bare}));
  84                                                                                 end
  85                                                                                 if r_item.subscription == "both" or r_item.subscription == "to" or r_item.ask then
  86                                                                                         core_post_stanza(session, st.presence({type="unsubscribe", from=session.full_jid, to=to_bare}));
  87                                                                                 end
  88                                                                                 local success, err_type, err_cond, err_msg = rm_remove_from_roster(session, jid);
  89                                                                                 if success then
  90                                                                                         session.send(st.reply(stanza));
  91                                                                                         rm_roster_push(from_node, from_host, jid);
  92                                                                                 else
  93                                                                                         session.send(st.error_reply(stanza, err_type, err_cond, err_msg));
  94                                                                                 end
  95                                                                         else
  96                                                                                 session.send(st.error_reply(stanza, "modify", "item-not-found"));
  97                                                                         end
  98                                                                 else
  99                                                                         local r_item = {name = item.attr.name, groups = {}};
 100                                                                         if r_item.name == "" then r_item.name = nil; end
 101                                                                         if session.roster[jid] then
 102                                                                                 r_item.subscription = session.roster[jid].subscription;
 103                                                                                 r_item.ask = session.roster[jid].ask;
 104                                                                         else
 105                                                                                 r_item.subscription = "none";
 106                                                                         end
 107                                                                         for _, child in ipairs(item) do
 108                                                                                 if child.name == "group" then
 109                                                                                         local text = t_concat(child);
 110                                                                                         if text and text ~= "" then
 111                                                                                                 r_item.groups[text] = true;
 112                                                                                         end
 113                                                                                 end
 114                                                                         end
 115                                                                         local success, err_type, err_cond, err_msg = rm_add_to_roster(session, jid, r_item);
 116                                                                         if success then
 117                                                                                 -- Ok, send success
 118                                                                                 session.send(st.reply(stanza));
 119                                                                                 -- and push change to all resources
 120                                                                                 rm_roster_push(from_node, from_host, jid);
 121                                                                         else
 122                                                                                 -- Adding to roster failed
 123                                                                                 session.send(st.error_reply(stanza, err_type, err_cond, err_msg));
 124                                                                         end
 125                                                                 end
 126                                                         else
 127                                                                 -- Trying to add self to roster
 128                                                                 session.send(st.error_reply(stanza, "cancel", "not-allowed"));
 129                                                         end
 130                                                 else
 131                                                         -- Invalid JID added to roster
 132                                                         session.send(st.error_reply(stanza, "modify", "bad-request")); -- FIXME what's the correct error?
 133                                                 end
 134                                         else
 135                                                 -- Roster set didn't include a single item, or its name wasn't  'item'
 136                                                 session.send(st.error_reply(stanza, "modify", "bad-request"));
 137                                         end
 138                                         return true;
 139                                 end
 140                         end
 141                 end);