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 local st = require "util.stanza"
  11
  12 local jid_split = require "util.jid".split;
  13 local jid_prep = require "util.jid".prep;
  14 local t_concat = table.concat;
  15 local tonumber = tonumber;
  16 local pairs, ipairs = pairs, ipairs;
  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:hook("iq/self/jabber:iq:roster:query", function(event)
  34         local session, stanza = event.origin, event.stanza;
  35
  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, item in pairs(session.roster) do
  46                                 if jid ~= "pending" and jid then
  47                                         roster:tag("item", {
  48                                                 jid = jid,
  49                                                 subscription = item.subscription,
  50                                                 ask = item.ask,
  51                                                 name = item.name,
  52                                         });
  53                                         for group in pairs(item.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         else -- stanza.attr.type == "set"
  64                 local query = stanza.tags[1];
  65                 if #query.tags == 1 and query.tags[1].name == "item"
  66                                 and query.tags[1].attr.xmlns == "jabber:iq:roster" and query.tags[1].attr.jid
  67                                 -- Protection against overwriting roster.pending, until we move it
  68                                 and query.tags[1].attr.jid ~= "pending" then
  69                         local item = query.tags[1];
  70                         local from_node, from_host = jid_split(stanza.attr.from);
  71                         local from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID
  72                         local jid = jid_prep(item.attr.jid);
  73                         local node, host, resource = jid_split(jid);
  74                         if not resource and host then
  75                                 if jid ~= from_node.."@"..from_host then
  76                                         if item.attr.subscription == "remove" then
  77                                                 local roster = session.roster;
  78                                                 local r_item = roster[jid];
  79                                                 if r_item then
  80                                                         local to_bare = node and (node.."@"..host) or host; -- bare JID
  81                                                         if r_item.subscription == "both" or r_item.subscription == "from" or (roster.pending and roster.pending[jid]) then
  82                                                                 core_post_stanza(session, st.presence({type="unsubscribed", from=session.full_jid, to=to_bare}));
  83                                                         end
  84                                                         if r_item.subscription == "both" or r_item.subscription == "to" or r_item.ask then
  85                                                                 core_post_stanza(session, st.presence({type="unsubscribe", from=session.full_jid, to=to_bare}));
  86                                                         end
  87                                                         local success, err_type, err_cond, err_msg = rm_remove_from_roster(session, jid);
  88                                                         if success then
  89                                                                 session.send(st.reply(stanza));
  90                                                                 rm_roster_push(from_node, from_host, jid);
  91                                                         else
  92                                                                 session.send(st.error_reply(stanza, err_type, err_cond, err_msg));
  93                                                         end
  94                                                 else
  95                                                         session.send(st.error_reply(stanza, "modify", "item-not-found"));
  96                                                 end
  97                                         else
  98                                                 local r_item = {name = item.attr.name, groups = {}};
  99                                                 if r_item.name == "" then r_item.name = nil; end
 100                                                 if session.roster[jid] then
 101                                                         r_item.subscription = session.roster[jid].subscription;
 102                                                         r_item.ask = session.roster[jid].ask;
 103                                                 else
 104                                                         r_item.subscription = "none";
 105                                                 end
 106                                                 for _, child in ipairs(item) do
 107                                                         if child.name == "group" then
 108                                                                 local text = t_concat(child);
 109                                                                 if text and text ~= "" then
 110                                                                         r_item.groups[text] = true;
 111                                                                 end
 112                                                         end
 113                                                 end
 114                                                 local success, err_type, err_cond, err_msg = rm_add_to_roster(session, jid, r_item);
 115                                                 if success then
 116                                                         -- Ok, send success
 117                                                         session.send(st.reply(stanza));
 118                                                         -- and push change to all resources
 119                                                         rm_roster_push(from_node, from_host, jid);
 120                                                 else
 121                                                         -- Adding to roster failed
 122                                                         session.send(st.error_reply(stanza, err_type, err_cond, err_msg));
 123                                                 end
 124                                         end
 125                                 else
 126                                         -- Trying to add self to roster
 127                                         session.send(st.error_reply(stanza, "cancel", "not-allowed"));
 128                                 end
 129                         else
 130                                 -- Invalid JID added to roster
 131                                 session.send(st.error_reply(stanza, "modify", "bad-request")); -- FIXME what's the correct error?
 132                         end
 133                 else
 134                         -- Roster set didn't include a single item, or its name wasn't  'item'
 135                         session.send(st.error_reply(stanza, "modify", "bad-request"));
 136                 end
 137         end
 138         return true;
 139 end);