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-- 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("rostermanager");
local setmetatable = setmetatable;
local format = string.format;
local loadfile, setfenv, pcall = loadfile, setfenv, pcall;
local pairs, ipairs = pairs, ipairs;
local tostring = tostring;
local hosts = hosts;
local datamanager = require "util.datamanager"
local st = require "util.stanza";
module "rostermanager"
function add_to_roster(session, jid, item)
if session.roster then
local old_item = session.roster[jid];
session.roster[jid] = item;
if save_roster(session.username, session.host) then
return true;
else
session.roster[jid] = old_item;
return nil, "wait", "internal-server-error", "Unable to save roster";
end
else
return nil, "auth", "not-authorized", "Session's roster not loaded";
end
end
function remove_from_roster(session, jid)
if session.roster then
local old_item = session.roster[jid];
session.roster[jid] = nil;
if save_roster(session.username, session.host) then
return true;
else
session.roster[jid] = old_item;
return nil, "wait", "internal-server-error", "Unable to save roster";
end
else
return nil, "auth", "not-authorized", "Session's roster not loaded";
end
end
function roster_push(username, host, jid)
local roster = jid and jid ~= "pending" and hosts[host] and hosts[host].sessions[username] and hosts[host].sessions[username].roster;
if roster then
local item = hosts[host].sessions[username].roster[jid];
local stanza = st.iq({type="set"});
stanza:tag("query", {xmlns = "jabber:iq:roster", ver = tostring(roster[false].version or "1") });
if item then
stanza:tag("item", {jid = jid, subscription = item.subscription, name = item.name, ask = item.ask});
for group in pairs(item.groups) do
stanza:tag("group"):text(group):up();
end
else
stanza:tag("item", {jid = jid, subscription = "remove"});
end
stanza:up(); -- move out from item
stanza:up(); -- move out from stanza
-- stanza ready
for _, session in pairs(hosts[host].sessions[username].sessions) do
if session.interested then
-- FIXME do we need to set stanza.attr.to?
session.send(stanza);
end
end
end
end
function load_roster(username, host)
log("debug", "load_roster: asked for: "..username.."@"..host);
if hosts[host] and hosts[host].sessions[username] then
local roster = hosts[host].sessions[username].roster;
if not roster then
log("debug", "load_roster: loading for new user: "..username.."@"..host);
roster = datamanager.load(username, host, "roster") or {};
if not roster[false] then roster[false] = { }; end
hosts[host].sessions[username].roster = roster;
end
return roster;
end
-- Attempt to load roster for non-loaded user
log("debug", "load_roster: loading for offline user: "..username.."@"..host);
return datamanager.load(username, host, "roster") or {};
end
function save_roster(username, host)
log("debug", "save_roster: saving roster for "..username.."@"..host);
if hosts[host] and hosts[host].sessions[username] and hosts[host].sessions[username].roster then
local roster = hosts[host].sessions[username].roster;
roster[false].version = (roster[false].version or 1) + 1;
return datamanager.store(username, host, "roster", hosts[host].sessions[username].roster);
end
log("warn", "save_roster: user had no roster to save");
return nil;
end
function process_inbound_subscription_approval(username, host, jid)
local roster = load_roster(username, host);
local item = roster[jid];
if item and item.ask then
if item.subscription == "none" then
item.subscription = "to";
else -- subscription == from
item.subscription = "both";
end
item.ask = nil;
return datamanager.store(username, host, "roster", roster);
end
end
function process_inbound_subscription_cancellation(username, host, jid)
local roster = load_roster(username, host);
local item = roster[jid];
local changed = nil;
if is_contact_pending_out(username, host, jid) then
item.ask = nil;
changed = true;
end
if item then
if item.subscription == "to" then
item.subscription = "none";
changed = true;
elseif item.subscription == "both" then
item.subscription = "from";
changed = true;
end
end
if changed then
return datamanager.store(username, host, "roster", roster);
end
end
function process_inbound_unsubscribe(username, host, jid)
local roster = load_roster(username, host);
local item = roster[jid];
local changed = nil;
if is_contact_pending_in(username, host, jid) then
roster.pending[jid] = nil; -- TODO maybe delete roster.pending if empty?
changed = true;
end
if item then
if item.subscription == "from" then
item.subscription = "none";
changed = true;
elseif item.subscription == "both" then
item.subscription = "to";
changed = true;
end
end
if changed then
return datamanager.store(username, host, "roster", roster);
end
end
function is_contact_subscribed(username, host, jid)
local roster = load_roster(username, host);
local item = roster[jid];
return item and (item.subscription == "from" or item.subscription == "both");
end
function is_contact_pending_in(username, host, jid)
local roster = load_roster(username, host);
return roster.pending and roster.pending[jid];
end
function set_contact_pending_in(username, host, jid, pending)
local roster = load_roster(username, host);
local item = roster[jid];
if item and (item.subscription == "from" or item.subscription == "both") then
return; -- false
end
if not roster.pending then roster.pending = {}; end
roster.pending[jid] = true;
return datamanager.store(username, host, "roster", roster);
end
function is_contact_pending_out(username, host, jid)
local roster = load_roster(username, host);
local item = roster[jid];
return item and item.ask;
end
function set_contact_pending_out(username, host, jid) -- subscribe
local roster = load_roster(username, host);
local item = roster[jid];
if item and (item.ask or item.subscription == "to" or item.subscription == "both") then
return true;
end
if not item then
item = {subscription = "none", groups = {}};
roster[jid] = item;
end
item.ask = "subscribe";
log("debug", "set_contact_pending_out: saving roster; set "..username.."@"..host..".roster["..jid.."].ask=subscribe");
return datamanager.store(username, host, "roster", roster);
end
function unsubscribe(username, host, jid)
local roster = load_roster(username, host);
local item = roster[jid];
if not item then return false; end
if (item.subscription == "from" or item.subscription == "none") and not item.ask then
return true;
end
item.ask = nil;
if item.subscription == "both" then
item.subscription = "from";
elseif item.subscription == "to" then
item.subscription = "none";
end
return datamanager.store(username, host, "roster", roster);
end
function subscribed(username, host, jid)
if is_contact_pending_in(username, host, jid) then
local roster = load_roster(username, host);
local item = roster[jid];
if not item then -- FIXME should roster item be auto-created?
item = {subscription = "none", groups = {}};
roster[jid] = item;
end
if item.subscription == "none" then
item.subscription = "from";
else -- subscription == to
item.subscription = "both";
end
roster.pending[jid] = nil;
-- TODO maybe remove roster.pending if empty
return datamanager.store(username, host, "roster", roster);
end -- TODO else implement optional feature pre-approval (ask = subscribed)
end
function unsubscribed(username, host, jid)
local roster = load_roster(username, host);
local item = roster[jid];
local pending = is_contact_pending_in(username, host, jid);
local changed = nil;
if is_contact_pending_in(username, host, jid) then
roster.pending[jid] = nil; -- TODO maybe delete roster.pending if empty?
changed = true;
end
if item then
if item.subscription == "from" then
item.subscription = "none";
changed = true;
elseif item.subscription == "both" then
item.subscription = "to";
changed = true;
end
end
if changed then
return datamanager.store(username, host, "roster", roster);
end
end
function process_outbound_subscription_request(username, host, jid)
local roster = load_roster(username, host);
local item = roster[jid];
if item and (item.subscription == "none" or item.subscription == "from") then
item.ask = "subscribe";
return datamanager.store(username, host, "roster", roster);
end
end
--[[function process_outbound_subscription_approval(username, host, jid)
local roster = load_roster(username, host);
local item = roster[jid];
if item and (item.subscription == "none" or item.subscription == "from" then
item.ask = "subscribe";
return datamanager.store(username, host, "roster", roster);
end
end]]
return _M;
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