Software / code / prosody
Changeset
1009:a2dd83bc3afa
mod_presence: initial commit
| author | Waqas Hussain <waqas20@gmail.com> |
|---|---|
| date | Wed, 15 Apr 2009 02:10:51 +0500 |
| parents | 1008:da7691ebec9c |
| children | 1010:d12eb30f7017 1011:beb039827c9f |
| files | plugins/mod_presence.lua |
| diffstat | 1 files changed, 267 insertions(+), 0 deletions(-) [+] |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/plugins/mod_presence.lua Wed Apr 15 02:10:51 2009 +0500 @@ -0,0 +1,267 @@ +-- Prosody IM v0.4 +-- Copyright (C) 2008-2009 Matthew Wild +-- Copyright (C) 2008-2009 Waqas Hussain +-- +-- This project is MIT/X11 licensed. Please see the +-- COPYING file in the source package for more information. +-- + + + +local log = require "util.logger".init("mod_presence") + +local require = require; +local pairs, ipairs = pairs, ipairs; +local t_concat = table.concat; +local s_find = string.find; +local tonumber = tonumber; + +local st = require "util.stanza"; +local jid_split = require "util.jid".split; +local jid_bare = require "util.jid".bare; +local hosts = hosts; + +local rostermanager = require "core.rostermanager"; +local sessionmanager = require "core.sessionmanager"; +local offlinemanager = require "core.offlinemanager"; + +function handle_presence(origin, stanza, from_bare, to_bare, core_route_stanza, inbound) + local type = stanza.attr.type; + if type and type ~= "unavailable" and type ~= "error" then + if inbound then + handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza); + else + handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza); + end + elseif not inbound and not stanza.attr.to then + handle_normal_presence(origin, stanza, core_route_stanza); + else + core_route_stanza(origin, stanza); + end +end + +function handle_normal_presence(origin, stanza, core_route_stanza) + if origin.roster then + for jid in pairs(origin.roster) do -- broadcast to all interested contacts + local subscription = origin.roster[jid].subscription; + if subscription == "both" or subscription == "from" then + stanza.attr.to = jid; + core_route_stanza(origin, stanza); + end + end + local node, host = jid_split(stanza.attr.from); + for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast to all resources + if res ~= origin and res.full_jid then -- to resource. FIXME is res.full_jid the correct check? Maybe it should be res.presence + stanza.attr.to = res.full_jid; + core_route_stanza(origin, stanza); + end + end + if stanza.attr.type == nil and not origin.presence then -- initial presence + local probe = st.presence({from = origin.full_jid, type = "probe"}); + for jid in pairs(origin.roster) do -- probe all contacts we are subscribed to + local subscription = origin.roster[jid].subscription; + if subscription == "both" or subscription == "to" then + probe.attr.to = jid; + core_route_stanza(origin, probe); + end + end + for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast from all available resources + if res ~= origin and res.presence then + res.presence.attr.to = origin.full_jid; + core_route_stanza(res, res.presence); + res.presence.attr.to = nil; + end + end + if origin.roster.pending then -- resend incoming subscription requests + for jid in pairs(origin.roster.pending) do + origin.send(st.presence({type="subscribe", from=jid})); -- TODO add to attribute? Use original? + end + end + local request = st.presence({type="subscribe", from=origin.username.."@"..origin.host}); + for jid, item in pairs(origin.roster) do -- resend outgoing subscription requests + if item.ask then + request.attr.to = jid; + core_route_stanza(origin, request); + end + end + local offline = offlinemanager.load(node, host); + if offline then + for _, msg in ipairs(offline) do + origin.send(msg); -- FIXME do we need to modify to/from in any way? + end + offlinemanager.deleteAll(node, host); + end + end + origin.priority = 0; + if stanza.attr.type == "unavailable" then + origin.presence = nil; + if origin.directed then + local old_from = stanza.attr.from; + stanza.attr.from = origin.full_jid; + for jid in pairs(origin.directed) do + stanza.attr.to = jid; + core_route_stanza(origin, stanza); + end + stanza.attr.from = old_from; + origin.directed = nil; + end + else + origin.presence = stanza; + local priority = stanza:child_with_name("priority"); + if priority and #priority > 0 then + priority = t_concat(priority); + if s_find(priority, "^[+-]?[0-9]+$") then + priority = tonumber(priority); + if priority < -128 then priority = -128 end + if priority > 127 then priority = 127 end + origin.priority = priority; + end + end + end + stanza.attr.to = nil; -- reset it + else + log("error", "presence recieved from client with no roster"); + end +end + +function send_presence_of_available_resources(user, host, jid, recipient_session, core_route_stanza) + local h = hosts[host]; + local count = 0; + if h and h.type == "local" then + local u = h.sessions[user]; + if u then + for k, session in pairs(u.sessions) do + local pres = session.presence; + if pres then + pres.attr.to = jid; + pres.attr.from = session.full_jid; + core_route_stanza(session, pres); + pres.attr.to = nil; + pres.attr.from = nil; + count = count + 1; + end + end + end + end + log("info", "broadcasted presence of "..count.." resources from "..user.."@"..host.." to "..jid); + return count; +end + +function handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza) + local node, host = jid_split(from_bare); + local st_from, st_to = stanza.attr.from, stanza.attr.to; + stanza.attr.from, stanza.attr.to = from_bare, to_bare; + log("debug", "outbound presence "..stanza.attr.type.." from "..from_bare.." for "..to_bare); + if stanza.attr.type == "subscribe" then + -- 1. route stanza + -- 2. roster push (subscription = none, ask = subscribe) + if rostermanager.set_contact_pending_out(node, host, to_bare) then + rostermanager.roster_push(node, host, to_bare); + end -- else file error + core_route_stanza(origin, stanza); + elseif stanza.attr.type == "unsubscribe" then + -- 1. route stanza + -- 2. roster push (subscription = none or from) + if rostermanager.unsubscribe(node, host, to_bare) then + rostermanager.roster_push(node, host, to_bare); -- FIXME do roster push when roster has in fact not changed? + end -- else file error + core_route_stanza(origin, stanza); + elseif stanza.attr.type == "subscribed" then + -- 1. route stanza + -- 2. roster_push () + -- 3. send_presence_of_available_resources + if rostermanager.subscribed(node, host, to_bare) then + rostermanager.roster_push(node, host, to_bare); + end + core_route_stanza(origin, stanza); + send_presence_of_available_resources(node, host, to_bare, origin, core_route_stanza); + elseif stanza.attr.type == "unsubscribed" then + -- 1. route stanza + -- 2. roster push (subscription = none or to) + if rostermanager.unsubscribed(node, host, to_bare) then + rostermanager.roster_push(node, host, to_bare); + end + core_route_stanza(origin, stanza); + end + stanza.attr.from, stanza.attr.to = st_from, st_to; +end + +function handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza) + local node, host = jid_split(to_bare); + local st_from, st_to = stanza.attr.from, stanza.attr.to; + stanza.attr.from, stanza.attr.to = from_bare, to_bare; + log("debug", "inbound presence "..stanza.attr.type.." from "..from_bare.." for "..to_bare); + if stanza.attr.type == "probe" then + if rostermanager.is_contact_subscribed(node, host, from_bare) then + if 0 == send_presence_of_available_resources(node, host, from_bare, origin, core_route_stanza) then + -- TODO send last recieved unavailable presence (or we MAY do nothing, which is fine too) + end + else + core_route_stanza(origin, st.presence({from=to_bare, to=from_bare, type="unsubscribed"})); + end + elseif stanza.attr.type == "subscribe" then + if rostermanager.is_contact_subscribed(node, host, from_bare) then + core_route_stanza(origin, st.presence({from=to_bare, to=from_bare, type="subscribed"})); -- already subscribed + -- Sending presence is not clearly stated in the RFC, but it seems appropriate + if 0 == send_presence_of_available_resources(node, host, from_bare, origin, core_route_stanza) then + -- TODO send last recieved unavailable presence (or we MAY do nothing, which is fine too) + end + else + if not rostermanager.is_contact_pending_in(node, host, from_bare) then + if rostermanager.set_contact_pending_in(node, host, from_bare) then + sessionmanager.send_to_available_resources(node, host, stanza); + end -- TODO else return error, unable to save + end + end + elseif stanza.attr.type == "unsubscribe" then + if rostermanager.process_inbound_unsubscribe(node, host, from_bare) then + rostermanager.roster_push(node, host, from_bare); + end + elseif stanza.attr.type == "subscribed" then + if rostermanager.process_inbound_subscription_approval(node, host, from_bare) then + rostermanager.roster_push(node, host, from_bare); + end + elseif stanza.attr.type == "unsubscribed" then + if rostermanager.process_inbound_subscription_cancellation(node, host, from_bare) then + rostermanager.roster_push(node, host, from_bare); + end + end -- discard any other type + stanza.attr.from, stanza.attr.to = st_from, st_to; +end + +local function presence_handler(data) + local origin, stanza = data.origin, data.stanza; + local to = stanza.attr.to; + local node, host = jid_split(to); + local to_bare = jid_bare(to); + local from_bare = jid_bare(stanza.attr.from); + if origin.type == "c2s" then + 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 + origin.directed = origin.directed or {}; + origin.directed[to] = true; + end + if to == nil and stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" and stanza.attr.type ~= "error" then + handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza); + elseif not to then + handle_normal_presence(origin, stanza); + else + core_route_stanza(origin, stanza); + end + elseif (origin.type == "s2sin" or origin.type == "component") and hosts[host] then + if to == nil and stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" and stanza.attr.type ~= "error" then + handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza); + else + core_route_stanza(origin, stanza); + end + end +end + +local add_handler = require "core.eventmanager2".add_handler; +local remove_handler = require "core.eventmanager2".remove_handler; + +add_handler(module:get_host().."/presence", presence_handler); +module.unload = function() + remove_handler(module:get_host().."/presence", presence_handler); +end + +return _M;
