diff options
Diffstat (limited to 'plugins/mod_pep_plus.lua')
| -rw-r--r-- | plugins/mod_pep_plus.lua | 498 |
1 files changed, 498 insertions, 0 deletions
diff --git a/plugins/mod_pep_plus.lua b/plugins/mod_pep_plus.lua new file mode 100644 index 00000000..89c1f820 --- /dev/null +++ b/plugins/mod_pep_plus.lua @@ -0,0 +1,498 @@ +local pubsub = require "util.pubsub"; +local jid_bare = require "util.jid".bare; +local jid_split = require "util.jid".split; +local jid_join = require "util.jid".join; +local set_new = require "util.set".new; +local st = require "util.stanza"; +local calculate_hash = require "util.caps".calculate_hash; +local is_contact_subscribed = require "core.rostermanager".is_contact_subscribed; +local cache = require "util.cache"; +local set = require "util.set"; + +local xmlns_pubsub = "http://jabber.org/protocol/pubsub"; +local xmlns_pubsub_event = "http://jabber.org/protocol/pubsub#event"; +local xmlns_pubsub_owner = "http://jabber.org/protocol/pubsub#owner"; + +local lib_pubsub = module:require "pubsub"; + +local empty_set = set_new(); + +local services = {}; +local recipients = {}; +local hash_map = {}; + +local host = module.host; + +local node_config = module:open_store("pep", "map"); +local known_nodes = module:open_store("pep"); + +function module.save() + return { services = services }; +end + +function module.restore(data) + services = data.services; +end + +function is_item_stanza(item) + return st.is_stanza(item) and item.attr.xmlns == xmlns_pubsub and item.name == "item"; +end + +local function subscription_presence(username, recipient) + local user_bare = jid_join(username, host); + local recipient_bare = jid_bare(recipient); + if (recipient_bare == user_bare) then return true; end + return is_contact_subscribed(username, host, recipient_bare); +end + +local function nodestore(username) + -- luacheck: ignore 212/self + local store = {}; + function store:get(node) + local data, err = node_config:get(username, node) + if data == true then + -- COMPAT Previously stored only a boolean representing 'persist_items' + data = { + name = node; + config = {}; + subscribers = {}; + affiliations = {}; + }; + end + return data, err; + end + function store:set(node, data) + if data then + -- Save the data without subscriptions + -- TODO Save explicit subscriptions maybe? + data = { + name = data.name; + config = data.config; + affiliations = data.affiliations; + subscribers = {}; + }; + end + return node_config:set(username, node, data); + end + function store:users() + return pairs(known_nodes:get(username) or {}); + end + return store; +end + +local function simple_itemstore(username) + return function (config, node) + if config["persist_items"] then + module:log("debug", "Creating new persistent item store for user %s, node %q", username, node); + local archive = module:open_store("pep_"..node, "archive"); + return lib_pubsub.archive_itemstore(archive, config, username, node, false); + else + module:log("debug", "Creating new ephemeral item store for user %s, node %q", username, node); + return cache.new(tonumber(config["max_items"])); + end + end +end + +local function get_broadcaster(username) + local user_bare = jid_join(username, host); + local function simple_broadcast(kind, node, jids, item) + local message = st.message({ from = user_bare, type = "headline" }) + :tag("event", { xmlns = xmlns_pubsub_event }) + :tag(kind, { node = node }); + if item then + item = st.clone(item); + item.attr.xmlns = nil; -- Clear the pubsub namespace + message:add_child(item); + end + for jid in pairs(jids) do + module:log("debug", "Sending notification to %s from %s: %s", jid, user_bare, tostring(item)); + message.attr.to = jid; + module:send(message); + end + end + return simple_broadcast; +end + +function get_pep_service(username) + module:log("debug", "get_pep_service(%q)", username); + local user_bare = jid_join(username, host); + local service = services[username]; + if service then + return service; + end + service = pubsub.new({ + capabilities = { + none = { + create = false; + publish = false; + retract = false; + get_nodes = false; + + subscribe = false; + unsubscribe = false; + get_subscription = false; + get_subscriptions = false; + get_items = false; + + subscribe_other = false; + unsubscribe_other = false; + get_subscription_other = false; + get_subscriptions_other = false; + + be_subscribed = true; + be_unsubscribed = true; + + set_affiliation = false; + }; + subscriber = { + create = false; + publish = false; + retract = false; + get_nodes = true; + + subscribe = true; + unsubscribe = true; + get_subscription = true; + get_subscriptions = true; + get_items = true; + + subscribe_other = false; + unsubscribe_other = false; + get_subscription_other = false; + get_subscriptions_other = false; + + be_subscribed = true; + be_unsubscribed = true; + + set_affiliation = false; + }; + publisher = { + create = false; + publish = true; + retract = true; + get_nodes = true; + + subscribe = true; + unsubscribe = true; + get_subscription = true; + get_subscriptions = true; + get_items = true; + + subscribe_other = false; + unsubscribe_other = false; + get_subscription_other = false; + get_subscriptions_other = false; + + be_subscribed = true; + be_unsubscribed = true; + + set_affiliation = false; + }; + owner = { + create = true; + publish = true; + retract = true; + delete = true; + get_nodes = true; + configure = true; + + subscribe = true; + unsubscribe = true; + get_subscription = true; + get_subscriptions = true; + get_items = true; + + + subscribe_other = true; + unsubscribe_other = true; + get_subscription_other = true; + get_subscriptions_other = true; + + be_subscribed = true; + be_unsubscribed = true; + + set_affiliation = true; + }; + }; + + node_defaults = { + ["max_items"] = 1; + ["persist_items"] = true; + }; + + autocreate_on_publish = true; + autocreate_on_subscribe = true; + + nodestore = nodestore(username); + itemstore = simple_itemstore(username); + broadcaster = get_broadcaster(username); + itemcheck = is_item_stanza; + get_affiliation = function (jid) + if jid_bare(jid) == user_bare then + return "owner"; + elseif subscription_presence(username, jid) then + return "subscriber"; + end + end; + + normalize_jid = jid_bare; + }); + local nodes, err = known_nodes:get(username); + if nodes then + module:log("debug", "Restoring nodes for user %s", username); + for node in pairs(nodes) do + module:log("debug", "Restoring node %q", node); + service:create(node, true); + end + elseif err then + module:log("error", "Could not restore nodes for %s: %s", username, err); + else + module:log("debug", "No known nodes"); + end + services[username] = service; + module:add_item("pep-service", { service = service, jid = user_bare }); + return service; +end + +function handle_pubsub_iq(event) + local origin, stanza = event.origin, event.stanza; + local service_name = origin.username; + if stanza.attr.to ~= nil then + service_name = jid_split(stanza.attr.to); + end + local service = get_pep_service(service_name); + + return lib_pubsub.handle_pubsub_iq(event, service) +end + +module:hook("iq/bare/"..xmlns_pubsub..":pubsub", handle_pubsub_iq); +module:hook("iq/bare/"..xmlns_pubsub_owner..":pubsub", handle_pubsub_iq); + +module:add_identity("pubsub", "pep", module:get_option_string("name", "Prosody")); +module:add_feature("http://jabber.org/protocol/pubsub#publish"); + +local function get_caps_hash_from_presence(stanza, current) + local t = stanza.attr.type; + if not t then + local child = stanza:get_child("c", "http://jabber.org/protocol/caps"); + if child 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 + end + return; -- no or bad caps + elseif t == "unavailable" or t == "error" then + return; + end + return current; -- no caps, could mean caps optimization, so return current +end + +local function resend_last_item(jid, node, service) + local ok, id, item = service:get_last_item(node, jid); + if not ok then return; end + if not id then return; end + service.config.broadcaster("items", node, { [jid] = true }, item); +end + +local function update_subscriptions(recipient, service_name, nodes) + nodes = nodes or empty_set; + + local service_recipients = recipients[service_name]; + if not service_recipients then + service_recipients = {}; + recipients[service_name] = service_recipients; + end + + local current = service_recipients[recipient]; + if not current or type(current) ~= "table" then + current = empty_set; + end + + if (current == empty_set or current:empty()) and (nodes == empty_set or nodes:empty()) then + return; + end + + local service = get_pep_service(service_name); + for node in current - nodes do + service:remove_subscription(node, recipient, recipient); + end + + for node in nodes - current do + service:add_subscription(node, recipient, recipient); + resend_last_item(recipient, node, service); + end + + if nodes == empty_set or nodes:empty() then + nodes = nil; + end + + service_recipients[recipient] = nodes; +end + +module:hook("presence/bare", function(event) + -- inbound presence to bare JID received + local origin, stanza = event.origin, event.stanza; + local t = stanza.attr.type; + local is_self = not stanza.attr.to; + local username = jid_split(stanza.attr.to); + local user_bare = jid_bare(stanza.attr.to); + if is_self then + username = origin.username; + user_bare = jid_join(username, host); + end + + if not t then -- available presence + if is_self or subscription_presence(username, stanza.attr.from) then + local recipient = stanza.attr.from; + local current = recipients[username] and recipients[username][recipient]; + local hash, query_node = get_caps_hash_from_presence(stanza, current); + if current == hash or (current and current == hash_map[hash]) then return; end + if not hash then + update_subscriptions(recipient, username); + else + recipients[username] = recipients[username] or {}; + if hash_map[hash] then + update_subscriptions(recipient, username, hash_map[hash]); + else + recipients[username][recipient] = hash; + local from_bare = origin.type == "c2s" and origin.username.."@"..origin.host; + if is_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_bare, to=stanza.attr.from, id="disco", type="get"}) + :tag("query", {xmlns = "http://jabber.org/protocol/disco#info", node = query_node}) + ); + end + end + end + end + elseif t == "unavailable" then + update_subscriptions(stanza.attr.from, username); + elseif not is_self and t == "unsubscribe" then + local from = jid_bare(stanza.attr.from); + local subscriptions = recipients[username]; + if subscriptions then + for subscriber in pairs(subscriptions) do + if jid_bare(subscriber) == from then + update_subscriptions(subscriber, username); + end + end + end + end +end, 10); + +module:hook("iq-result/bare/disco", function(event) + local origin, stanza = event.origin, event.stanza; + local disco = stanza:get_child("query", "http://jabber.org/protocol/disco#info"); + if not disco then + return; + end + + -- Process disco response + local is_self = stanza.attr.to == nil; + local user_bare = jid_bare(stanza.attr.to); + local username = jid_split(stanza.attr.to); + if is_self then + username = origin.username; + user_bare = jid_join(username, host); + end + local contact = stanza.attr.from; + local current = recipients[username] and recipients[username][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 = set_new(); + 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:add(nfeature); end + end + end + hash_map[ver] = notify; -- update hash map + if is_self then + -- Optimization: Fiddle with other local users + for jid, item in pairs(origin.roster) do -- for all interested contacts + if jid then + local contact_node, contact_host = jid_split(jid); + if contact_host == host and (item.subscription == "both" or item.subscription == "from") then + update_subscriptions(user_bare, contact_node, notify); + end + end + end + end + update_subscriptions(contact, username, notify); +end); + +module:hook("account-disco-info-node", function(event) + local stanza, origin = event.stanza, event.origin; + local service_name = origin.username; + if stanza.attr.to ~= nil then + service_name = jid_split(stanza.attr.to); + end + local service = get_pep_service(service_name); + return lib_pubsub.handle_disco_info_node(event, service); +end); + +module:hook("account-disco-info", function(event) + local origin, reply = event.origin, event.reply; + + reply:tag('identity', {category='pubsub', type='pep'}):up(); + + local username = jid_split(reply.attr.from) or origin.username; + local service = get_pep_service(username); + + local supported_features = lib_pubsub.get_feature_set(service) + set.new{ + -- Features not covered by the above + "access-presence", + "auto-subscribe", + "filtered-notifications", + "last-published", + "persistent-items", + "presence-notifications", + "presence-subscribe", + }; + + for feature in supported_features do + reply:tag('feature', {var=xmlns_pubsub.."#"..feature}):up(); + end +end); + +module:hook("account-disco-items-node", function(event) + local stanza, origin = event.stanza, event.origin; + local is_self = stanza.attr.to == nil; + local username = jid_split(stanza.attr.to); + if is_self then + username = origin.username; + end + local service = get_pep_service(username); + return lib_pubsub.handle_disco_items_node(event, service); +end); + +module:hook("account-disco-items", function(event) + local reply, stanza, origin = event.reply, event.stanza, event.origin; + + local is_self = stanza.attr.to == nil; + local user_bare = jid_bare(stanza.attr.to); + local username = jid_split(stanza.attr.to); + if is_self then + username = origin.username; + user_bare = jid_join(username, host); + end + local service = get_pep_service(username); + + local ok, ret = service:get_nodes(jid_bare(stanza.attr.from)); + if not ok then return; end + + for node, node_obj in pairs(ret) do + reply:tag("item", { jid = user_bare, node = node, name = node_obj.config.name }):up(); + end +end); |