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local pubsub = require "util.pubsub";
local st = require "util.stanza";
local jid_bare = require "util.jid".bare;
local usermanager = require "core.usermanager";
local new_id = require "util.id".medium;
local storagemanager = require "core.storagemanager";
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 autocreate_on_publish = module:get_option_boolean("autocreate_on_publish", false);
local autocreate_on_subscribe = module:get_option_boolean("autocreate_on_subscribe", false);
local pubsub_disco_name = module:get_option_string("name", "Prosody PubSub Service");
local expose_publisher = module:get_option_boolean("expose_publisher", false)
local service;
local lib_pubsub = module:require "pubsub";
module:depends("disco");
module:add_identity("pubsub", "service", pubsub_disco_name);
module:add_feature("http://jabber.org/protocol/pubsub");
function handle_pubsub_iq(event)
return lib_pubsub.handle_pubsub_iq(event, service);
end
-- An itemstore supports the following methods:
-- items(): iterator over (id, item)
-- get(id): return item with id
-- set(id, item): set id to item
-- clear(): clear all items
-- resize(n): set new limit and trim oldest items
-- tail(): return the latest item
-- A nodestore supports the following methods:
-- set(node_name, node_data)
-- get(node_name)
-- users(): iterator over (node_name)
local max_max_items = module:get_option_number("pubsub_max_items", 256);
local function tonumber_max_items(n)
if n == "max" then
return max_max_items;
end
return tonumber(n);
end
local node_store = module:open_store(module.name.."_nodes");
local function create_simple_itemstore(node_config, node_name) --> util.cache like object
local driver = storagemanager.get_driver(module.host, "pubsub_data");
local archive = driver:open("pubsub_"..node_name, "archive");
local max_items = tonumber_max_items(node_config["max_items"]);
return lib_pubsub.archive_itemstore(archive, max_items, nil, node_name);
end
function simple_broadcast(kind, node, jids, item, actor, node_obj, service) --luacheck: ignore 431/service
if node_obj then
if node_obj.config["notify_"..kind] == false then
return;
end
end
if kind == "retract" then
kind = "items"; -- XEP-0060 signals retraction in an <items> container
end
if item then
item = st.clone(item);
item.attr.xmlns = nil; -- Clear the pubsub namespace
if kind == "items" then
if node_obj and node_obj.config.include_payload == false then
item:maptags(function () return nil; end);
end
if not expose_publisher then
item.attr.publisher = nil;
elseif not item.attr.publisher then
item.attr.publisher = service.config.normalize_jid(actor);
end
end
end
local id = new_id();
local msg_type = node_obj and node_obj.config.notification_type or "headline";
local message = st.message({ from = module.host, type = msg_type, id = id })
:tag("event", { xmlns = xmlns_pubsub_event })
:tag(kind, { node = node });
if item then
message:add_child(item);
end
local summary;
if item and item.tags[1] then
local payload = item.tags[1];
summary = module:fire_event("pubsub-summary/"..payload.attr.xmlns, {
kind = kind, node = node, jids = jids, actor = actor, item = item, payload = payload,
});
end
for jid, options in pairs(jids) do
local new_stanza = st.clone(message);
if summary and type(options) == "table" and options["pubsub#include_body"] then
new_stanza:body(summary);
end
new_stanza.attr.to = jid;
module:send(new_stanza);
end
end
function check_node_config(node, actor, new_config) -- luacheck: ignore 212/node 212/actor
if (tonumber_max_items(new_config["max_items"]) or 1) > max_max_items then
return false;
end
if new_config["access_model"] ~= "whitelist"
and new_config["access_model"] ~= "open" then
return false;
end
return true;
end
function is_item_stanza(item)
return st.is_stanza(item) and item.attr.xmlns == xmlns_pubsub and item.name == "item" and #item.tags == 1;
end
-- Compose a textual representation of Atom payloads
module:hook("pubsub-summary/http://www.w3.org/2005/Atom", function (event)
local payload = event.payload;
local title = payload:get_child_text("title");
local summary = payload:get_child_text("summary");
if not summary and title then
local author = payload:find("author/name#");
summary = title;
if author then
summary = author .. " posted " .. summary;
end
end
return summary;
end, -1);
module:hook("iq/host/"..xmlns_pubsub..":pubsub", handle_pubsub_iq);
module:hook("iq/host/"..xmlns_pubsub_owner..":pubsub", handle_pubsub_iq);
local function add_disco_features_from_service(service) --luacheck: ignore 431/service
for feature in lib_pubsub.get_feature_set(service) do
module:add_feature(xmlns_pubsub.."#"..feature);
end
end
module:hook("host-disco-info-node", function (event)
return lib_pubsub.handle_disco_info_node(event, service);
end);
module:hook("host-disco-items-node", function (event)
return lib_pubsub.handle_disco_items_node(event, service);
end);
module:hook("host-disco-items", function (event)
local stanza, reply = event.stanza, event.reply;
local ok, ret = service:get_nodes(stanza.attr.from);
if not ok then
return;
end
for node, node_obj in pairs(ret) do
reply:tag("item", { jid = module.host, node = node, name = node_obj.config.title }):up();
end
end);
local admin_aff = module:get_option_string("default_admin_affiliation", "owner");
local function get_affiliation(jid)
local bare_jid = jid_bare(jid);
if bare_jid == module.host or usermanager.is_admin(bare_jid, module.host) then
return admin_aff;
end
end
function get_service()
return service;
end
function set_service(new_service)
service = new_service;
service.config.autocreate_on_publish = autocreate_on_publish;
service.config.autocreate_on_subscribe = autocreate_on_subscribe;
service.config.expose_publisher = expose_publisher;
service.config.nodestore = node_store;
service.config.itemstore = create_simple_itemstore;
service.config.broadcaster = simple_broadcast;
service.config.itemcheck = is_item_stanza;
service.config.check_node_config = check_node_config;
service.config.get_affiliation = get_affiliation;
module.environment.service = service;
add_disco_features_from_service(service);
end
function module.save()
return { service = service };
end
function module.restore(data)
set_service(data.service);
end
function module.load()
if module.reloading then return; end
set_service(pubsub.new({
autocreate_on_publish = autocreate_on_publish;
autocreate_on_subscribe = autocreate_on_subscribe;
expose_publisher = expose_publisher;
node_defaults = {
["persist_items"] = true;
};
nodestore = node_store;
itemstore = create_simple_itemstore;
broadcaster = simple_broadcast;
itemcheck = is_item_stanza;
check_node_config = check_node_config;
get_affiliation = get_affiliation;
normalize_jid = jid_bare;
}));
end
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