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mod_presence: initial commit
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Waqas Hussain
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287a14959e
commit
6857f81a91
1 changed files with 267 additions and 0 deletions
267
plugins/mod_presence.lua
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267
plugins/mod_presence.lua
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-- Prosody IM v0.4
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-- Copyright (C) 2008-2009 Matthew Wild
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-- Copyright (C) 2008-2009 Waqas Hussain
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--
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-- This project is MIT/X11 licensed. Please see the
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-- COPYING file in the source package for more information.
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--
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local log = require "util.logger".init("mod_presence")
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local require = require;
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local pairs, ipairs = pairs, ipairs;
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local t_concat = table.concat;
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local s_find = string.find;
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local tonumber = tonumber;
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local st = require "util.stanza";
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local jid_split = require "util.jid".split;
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local jid_bare = require "util.jid".bare;
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local hosts = hosts;
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local rostermanager = require "core.rostermanager";
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local sessionmanager = require "core.sessionmanager";
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local offlinemanager = require "core.offlinemanager";
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function handle_presence(origin, stanza, from_bare, to_bare, core_route_stanza, inbound)
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local type = stanza.attr.type;
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if type and type ~= "unavailable" and type ~= "error" then
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if inbound then
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handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
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else
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handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
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end
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elseif not inbound and not stanza.attr.to then
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handle_normal_presence(origin, stanza, core_route_stanza);
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else
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core_route_stanza(origin, stanza);
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end
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end
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function handle_normal_presence(origin, stanza, core_route_stanza)
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if origin.roster then
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for jid in pairs(origin.roster) do -- broadcast to all interested contacts
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local subscription = origin.roster[jid].subscription;
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if subscription == "both" or subscription == "from" then
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stanza.attr.to = jid;
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core_route_stanza(origin, stanza);
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end
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end
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local node, host = jid_split(stanza.attr.from);
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for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast to all resources
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if res ~= origin and res.full_jid then -- to resource. FIXME is res.full_jid the correct check? Maybe it should be res.presence
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stanza.attr.to = res.full_jid;
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core_route_stanza(origin, stanza);
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end
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end
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if stanza.attr.type == nil and not origin.presence then -- initial presence
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local probe = st.presence({from = origin.full_jid, type = "probe"});
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for jid in pairs(origin.roster) do -- probe all contacts we are subscribed to
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local subscription = origin.roster[jid].subscription;
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if subscription == "both" or subscription == "to" then
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probe.attr.to = jid;
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core_route_stanza(origin, probe);
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end
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end
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for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast from all available resources
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if res ~= origin and res.presence then
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res.presence.attr.to = origin.full_jid;
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core_route_stanza(res, res.presence);
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res.presence.attr.to = nil;
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end
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end
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if origin.roster.pending then -- resend incoming subscription requests
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for jid in pairs(origin.roster.pending) do
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origin.send(st.presence({type="subscribe", from=jid})); -- TODO add to attribute? Use original?
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end
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end
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local request = st.presence({type="subscribe", from=origin.username.."@"..origin.host});
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for jid, item in pairs(origin.roster) do -- resend outgoing subscription requests
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if item.ask then
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request.attr.to = jid;
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core_route_stanza(origin, request);
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end
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end
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local offline = offlinemanager.load(node, host);
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if offline then
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for _, msg in ipairs(offline) do
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origin.send(msg); -- FIXME do we need to modify to/from in any way?
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end
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offlinemanager.deleteAll(node, host);
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end
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end
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origin.priority = 0;
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if stanza.attr.type == "unavailable" then
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origin.presence = nil;
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if origin.directed then
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local old_from = stanza.attr.from;
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stanza.attr.from = origin.full_jid;
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for jid in pairs(origin.directed) do
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stanza.attr.to = jid;
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core_route_stanza(origin, stanza);
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end
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stanza.attr.from = old_from;
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origin.directed = nil;
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end
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else
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origin.presence = stanza;
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local priority = stanza:child_with_name("priority");
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if priority and #priority > 0 then
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priority = t_concat(priority);
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if s_find(priority, "^[+-]?[0-9]+$") then
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priority = tonumber(priority);
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if priority < -128 then priority = -128 end
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if priority > 127 then priority = 127 end
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origin.priority = priority;
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end
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end
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end
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stanza.attr.to = nil; -- reset it
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else
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log("error", "presence recieved from client with no roster");
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end
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end
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function send_presence_of_available_resources(user, host, jid, recipient_session, core_route_stanza)
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local h = hosts[host];
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local count = 0;
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if h and h.type == "local" then
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local u = h.sessions[user];
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if u then
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for k, session in pairs(u.sessions) do
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local pres = session.presence;
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if pres then
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pres.attr.to = jid;
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pres.attr.from = session.full_jid;
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core_route_stanza(session, pres);
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pres.attr.to = nil;
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pres.attr.from = nil;
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count = count + 1;
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end
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end
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end
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end
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log("info", "broadcasted presence of "..count.." resources from "..user.."@"..host.." to "..jid);
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return count;
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end
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function handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza)
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local node, host = jid_split(from_bare);
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local st_from, st_to = stanza.attr.from, stanza.attr.to;
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stanza.attr.from, stanza.attr.to = from_bare, to_bare;
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log("debug", "outbound presence "..stanza.attr.type.." from "..from_bare.." for "..to_bare);
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if stanza.attr.type == "subscribe" then
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-- 1. route stanza
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-- 2. roster push (subscription = none, ask = subscribe)
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if rostermanager.set_contact_pending_out(node, host, to_bare) then
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rostermanager.roster_push(node, host, to_bare);
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end -- else file error
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core_route_stanza(origin, stanza);
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elseif stanza.attr.type == "unsubscribe" then
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-- 1. route stanza
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-- 2. roster push (subscription = none or from)
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if rostermanager.unsubscribe(node, host, to_bare) then
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rostermanager.roster_push(node, host, to_bare); -- FIXME do roster push when roster has in fact not changed?
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end -- else file error
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core_route_stanza(origin, stanza);
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elseif stanza.attr.type == "subscribed" then
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-- 1. route stanza
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-- 2. roster_push ()
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-- 3. send_presence_of_available_resources
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if rostermanager.subscribed(node, host, to_bare) then
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rostermanager.roster_push(node, host, to_bare);
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end
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core_route_stanza(origin, stanza);
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send_presence_of_available_resources(node, host, to_bare, origin, core_route_stanza);
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elseif stanza.attr.type == "unsubscribed" then
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-- 1. route stanza
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-- 2. roster push (subscription = none or to)
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if rostermanager.unsubscribed(node, host, to_bare) then
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rostermanager.roster_push(node, host, to_bare);
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end
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core_route_stanza(origin, stanza);
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end
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stanza.attr.from, stanza.attr.to = st_from, st_to;
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end
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function handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza)
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local node, host = jid_split(to_bare);
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local st_from, st_to = stanza.attr.from, stanza.attr.to;
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stanza.attr.from, stanza.attr.to = from_bare, to_bare;
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log("debug", "inbound presence "..stanza.attr.type.." from "..from_bare.." for "..to_bare);
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if stanza.attr.type == "probe" then
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if rostermanager.is_contact_subscribed(node, host, from_bare) then
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if 0 == send_presence_of_available_resources(node, host, from_bare, origin, core_route_stanza) then
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-- TODO send last recieved unavailable presence (or we MAY do nothing, which is fine too)
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end
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else
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core_route_stanza(origin, st.presence({from=to_bare, to=from_bare, type="unsubscribed"}));
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end
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elseif stanza.attr.type == "subscribe" then
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if rostermanager.is_contact_subscribed(node, host, from_bare) then
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core_route_stanza(origin, st.presence({from=to_bare, to=from_bare, type="subscribed"})); -- already subscribed
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-- Sending presence is not clearly stated in the RFC, but it seems appropriate
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if 0 == send_presence_of_available_resources(node, host, from_bare, origin, core_route_stanza) then
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-- TODO send last recieved unavailable presence (or we MAY do nothing, which is fine too)
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end
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else
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if not rostermanager.is_contact_pending_in(node, host, from_bare) then
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if rostermanager.set_contact_pending_in(node, host, from_bare) then
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sessionmanager.send_to_available_resources(node, host, stanza);
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end -- TODO else return error, unable to save
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end
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end
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elseif stanza.attr.type == "unsubscribe" then
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if rostermanager.process_inbound_unsubscribe(node, host, from_bare) then
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rostermanager.roster_push(node, host, from_bare);
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end
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elseif stanza.attr.type == "subscribed" then
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if rostermanager.process_inbound_subscription_approval(node, host, from_bare) then
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rostermanager.roster_push(node, host, from_bare);
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end
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elseif stanza.attr.type == "unsubscribed" then
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if rostermanager.process_inbound_subscription_cancellation(node, host, from_bare) then
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rostermanager.roster_push(node, host, from_bare);
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end
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end -- discard any other type
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stanza.attr.from, stanza.attr.to = st_from, st_to;
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end
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local function presence_handler(data)
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local origin, stanza = data.origin, data.stanza;
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local to = stanza.attr.to;
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local node, host = jid_split(to);
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local to_bare = jid_bare(to);
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local from_bare = jid_bare(stanza.attr.from);
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if origin.type == "c2s" then
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if to ~= nil and not(origin.roster[to_bare] and (origin.roster[to_bare].subscription == "both" or origin.roster[to_bare].subscription == "from")) then -- directed presence
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origin.directed = origin.directed or {};
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origin.directed[to] = true;
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end
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if to == nil and stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" and stanza.attr.type ~= "error" then
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handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
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elseif not to then
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handle_normal_presence(origin, stanza);
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else
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core_route_stanza(origin, stanza);
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end
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elseif (origin.type == "s2sin" or origin.type == "component") and hosts[host] then
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if to == nil and stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" and stanza.attr.type ~= "error" then
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handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
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else
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core_route_stanza(origin, stanza);
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end
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end
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end
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local add_handler = require "core.eventmanager2".add_handler;
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local remove_handler = require "core.eventmanager2".remove_handler;
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add_handler(module:get_host().."/presence", presence_handler);
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module.unload = function()
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remove_handler(module:get_host().."/presence", presence_handler);
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end
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return _M;
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