diff options
Diffstat (limited to 'plugins/mod_pep.lua')
| -rw-r--r-- | plugins/mod_pep.lua | 280 |
1 files changed, 280 insertions, 0 deletions
diff --git a/plugins/mod_pep.lua b/plugins/mod_pep.lua new file mode 100644 index 00000000..a65ee903 --- /dev/null +++ b/plugins/mod_pep.lua @@ -0,0 +1,280 @@ +-- Prosody IM +-- Copyright (C) 2008-2010 Matthew Wild +-- Copyright (C) 2008-2010 Waqas Hussain +-- +-- This project is MIT/X11 licensed. Please see the +-- COPYING file in the source package for more information. +-- + + +local jid_bare = require "util.jid".bare; +local jid_split = require "util.jid".split; +local st = require "util.stanza"; +local is_contact_subscribed = require "core.rostermanager".is_contact_subscribed; +local pairs = pairs; +local next = next; +local type = type; +local calculate_hash = require "util.caps".calculate_hash; +local core_post_stanza = prosody.core_post_stanza; + +local NULL = {}; +local data = {}; +local recipients = {}; +local hash_map = {}; + +module.save = function() + return { data = data, recipients = recipients, hash_map = hash_map }; +end +module.restore = function(state) + data = state.data or {}; + recipients = state.recipients or {}; + hash_map = state.hash_map or {}; +end + +module:add_identity("pubsub", "pep", module:get_option_string("name", "Prosody")); +module:add_feature("http://jabber.org/protocol/pubsub#publish"); + +local function subscription_presence(user_bare, recipient) + local recipient_bare = jid_bare(recipient); + if (recipient_bare == user_bare) then return true end + local username, host = jid_split(user_bare); + return is_contact_subscribed(username, host, recipient_bare); +end + +local function publish(session, node, id, item) + item.attr.xmlns = nil; + local disable = #item.tags ~= 1 or #item.tags[1] == 0; + if #item.tags == 0 then item.name = "retract"; end + local bare = session.username..'@'..session.host; + local stanza = st.message({from=bare, type='headline'}) + :tag('event', {xmlns='http://jabber.org/protocol/pubsub#event'}) + :tag('items', {node=node}) + :add_child(item) + :up() + :up(); + + -- store for the future + local user_data = data[bare]; + if disable then + if user_data then + user_data[node] = nil; + if not next(user_data) then data[bare] = nil; end + end + else + if not user_data then user_data = {}; data[bare] = user_data; end + user_data[node] = {id or "1", item}; + end + + -- broadcast + for recipient, notify in pairs(recipients[bare] or NULL) do + if notify[node] then + stanza.attr.to = recipient; + core_post_stanza(session, stanza); + end + end +end +local function publish_all(user, recipient, session) + local d = data[user]; + local notify = recipients[user] and recipients[user][recipient]; + if d and notify then + for node in pairs(notify) do + if d[node] then + local id, item = unpack(d[node]); + session.send(st.message({from=user, to=recipient, type='headline'}) + :tag('event', {xmlns='http://jabber.org/protocol/pubsub#event'}) + :tag('items', {node=node}) + :add_child(item) + :up() + :up()); + end + end + end +end + +local function get_caps_hash_from_presence(stanza, current) + local t = stanza.attr.type; + if not t then + for _, child in pairs(stanza.tags) do + if child.name == "c" and child.attr.xmlns == "http://jabber.org/protocol/caps" then + local attr = child.attr; + if attr.hash then -- new caps + if attr.hash == 'sha-1' and attr.node and attr.ver then return attr.ver, attr.node.."#"..attr.ver; end + else -- legacy caps + if attr.node and attr.ver then return attr.node.."#"..attr.ver.."#"..(attr.ext or ""), attr.node.."#"..attr.ver; end + end + return; -- bad caps format + end + end + elseif t == "unavailable" or t == "error" then + return; + end + return current; -- no caps, could mean caps optimization, so return current +end + +module:hook("presence/bare", function(event) + -- inbound presence to bare JID recieved + local origin, stanza = event.origin, event.stanza; + local user = stanza.attr.to or (origin.username..'@'..origin.host); + local t = stanza.attr.type; + local self = not stanza.attr.to; + + if not t then -- available presence + if self or subscription_presence(user, stanza.attr.from) then + local recipient = stanza.attr.from; + local current = recipients[user] and recipients[user][recipient]; + local hash = get_caps_hash_from_presence(stanza, current); + if current == hash or (current and current == hash_map[hash]) then return; end + if not hash then + if recipients[user] then recipients[user][recipient] = nil; end + else + recipients[user] = recipients[user] or {}; + if hash_map[hash] then + recipients[user][recipient] = hash_map[hash]; + publish_all(user, recipient, origin); + else + recipients[user][recipient] = hash; + local from_bare = origin.type == "c2s" and origin.username.."@"..origin.host; + if self or origin.type ~= "c2s" or (recipients[from_bare] and recipients[from_bare][origin.full_jid]) ~= hash then + -- COMPAT from ~= stanza.attr.to because OneTeam can't deal with missing from attribute + origin.send( + st.stanza("iq", {from=user, to=stanza.attr.from, id="disco", type="get"}) + :query("http://jabber.org/protocol/disco#info") + ); + end + end + end + end + elseif t == "unavailable" then + if recipients[user] then recipients[user][stanza.attr.from] = nil; end + elseif not self and t == "unsubscribe" then + local from = jid_bare(stanza.attr.from); + local subscriptions = recipients[user]; + if subscriptions then + for subscriber in pairs(subscriptions) do + if jid_bare(subscriber) == from then + recipients[user][subscriber] = nil; + end + end + end + end +end, 10); + +module:hook("iq/bare/http://jabber.org/protocol/pubsub:pubsub", function(event) + local session, stanza = event.origin, event.stanza; + local payload = stanza.tags[1]; + + if stanza.attr.type == 'set' and (not stanza.attr.to or jid_bare(stanza.attr.from) == stanza.attr.to) then + payload = payload.tags[1]; + if payload and (payload.name == 'publish' or payload.name == 'retract') and payload.attr.node then -- <publish node='http://jabber.org/protocol/tune'> + local node = payload.attr.node; + payload = payload.tags[1]; + if payload and payload.name == "item" then -- <item> + local id = payload.attr.id; + session.send(st.reply(stanza)); + publish(session, node, id, st.clone(payload)); + return true; + end + end + elseif stanza.attr.type == 'get' then + local user = stanza.attr.to and jid_bare(stanza.attr.to) or session.username..'@'..session.host; + if subscription_presence(user, stanza.attr.from) then + local user_data = data[user]; + local node, requested_id; + payload = payload.tags[1]; + if payload and payload.name == 'items' then + node = payload.attr.node; + local item = payload.tags[1]; + if item and item.name == "item" then + requested_id = item.attr.id; + end + end + if node and user_data and user_data[node] then -- Send the last item + local id, item = unpack(user_data[node]); + if not requested_id or id == requested_id then + local stanza = st.reply(stanza) + :tag('pubsub', {xmlns='http://jabber.org/protocol/pubsub'}) + :tag('items', {node=node}) + :add_child(item) + :up() + :up(); + session.send(stanza); + return true; + else -- requested item doesn't exist + local stanza = st.reply(stanza) + :tag('pubsub', {xmlns='http://jabber.org/protocol/pubsub'}) + :tag('items', {node=node}) + :up(); + session.send(stanza); + return true; + end + elseif node then -- node doesn't exist + session.send(st.error_reply(stanza, 'cancel', 'item-not-found')); + return true; + else --invalid request + session.send(st.error_reply(stanza, 'modify', 'bad-request')); + return true; + end + else --no presence subscription + session.send(st.error_reply(stanza, 'auth', 'not-authorized') + :tag('presence-subscription-required', {xmlns='http://jabber.org/protocol/pubsub#errors'})); + return true; + end + end +end); + +module:hook("iq-result/bare/disco", function(event) + local session, stanza = event.origin, event.stanza; + if stanza.attr.type == "result" then + local disco = stanza.tags[1]; + if disco and disco.name == "query" and disco.attr.xmlns == "http://jabber.org/protocol/disco#info" then + -- Process disco response + local self = not stanza.attr.to; + local user = stanza.attr.to or (session.username..'@'..session.host); + local contact = stanza.attr.from; + local current = recipients[user] and recipients[user][contact]; + if type(current) ~= "string" then return; end -- check if waiting for recipient's response + local ver = current; + if not string.find(current, "#") then + ver = calculate_hash(disco.tags); -- calculate hash + end + local notify = {}; + for _, feature in pairs(disco.tags) do + if feature.name == "feature" and feature.attr.var then + local nfeature = feature.attr.var:match("^(.*)%+notify$"); + if nfeature then notify[nfeature] = true; end + end + end + hash_map[ver] = notify; -- update hash map + if self then + for jid, item in pairs(session.roster) do -- for all interested contacts + if item.subscription == "both" or item.subscription == "from" then + if not recipients[jid] then recipients[jid] = {}; end + recipients[jid][contact] = notify; + publish_all(jid, contact, session); + end + end + end + recipients[user][contact] = notify; -- set recipient's data to calculated data + -- send messages to recipient + publish_all(user, contact, session); + end + end +end); + +module:hook("account-disco-info", function(event) + local stanza = event.stanza; + stanza:tag('identity', {category='pubsub', type='pep'}):up(); + stanza:tag('feature', {var='http://jabber.org/protocol/pubsub#publish'}):up(); +end); + +module:hook("account-disco-items", function(event) + local stanza = event.stanza; + local bare = stanza.attr.to; + local user_data = data[bare]; + + if user_data then + for node, _ in pairs(user_data) do + stanza:tag('item', {jid=bare, node=node}):up(); -- TODO we need to handle queries to these nodes + end + end +end); 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