File

plugins/mod_pubsub/mod_pubsub.lua @ 13028:b2e6a175537d

mod_debug_reset: Don't delay operations until next tick For some unknown reason, this was required with the old mock util.time functions prior to 012d6e7b723a. After 012d6e7b723a, it breaks. So I'm happy to revert to not delaying anything. This makes tests pass again.
author Matthew Wild <mwild1@gmail.com>
date Thu, 06 Apr 2023 14:17:50 +0100
parent 12977:74b9e05af71e
child 13202:173038306750
line wrap: on
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local pubsub = require "prosody.util.pubsub";
local st = require "prosody.util.stanza";
local jid_bare = require "prosody.util.jid".bare;
local new_id = require "prosody.util.id".medium;
local storagemanager = require "prosody.core.storagemanager";
local xtemplate = require "prosody.util.xtemplate";

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 service_expose_publisher = module:get_option_boolean("expose_publisher")

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

for _, field in ipairs(lib_pubsub.node_config_form) do
	if field.var == "pubsub#max_items" then
		field.range_max = max_max_items;
		break;
	end
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
			local node_expose_publisher = service_expose_publisher;
			if node_expose_publisher == nil and node_obj and node_obj.config.itemreply == "publisher" then
				node_expose_publisher = true;
			end
			if not node_expose_publisher then
				item.attr.publisher = nil;
			elseif not item.attr.publisher and actor ~= true 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];
		local payload_type = node_obj and node_obj.config.payload_type or payload.attr.xmlns;
		summary = module:fire_event("pubsub-summary/"..payload_type, {
			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
local summary_templates = module:get_option("pubsub_summary_templates", {
	["http://www.w3.org/2005/Atom"] = "{summary|or{{author/name|and{{author/name} posted }}{title}}}";
})

for pubsub_type, template in pairs(summary_templates) do
	module:hook("pubsub-summary/"..pubsub_type, function (event)
		local payload = event.payload;
		return xtemplate.render(template, payload, tostring);
	end, -1);
end


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");
module:default_permission("prosody:admin", ":service-admin");
local function get_affiliation(jid)
	local bare_jid = jid_bare(jid);
	if bare_jid == module.host or module:may(":service-admin", bare_jid) 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 = service_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 = service_expose_publisher;

		node_defaults = {
			["persist_items"] = true;
		};
		max_items = max_max_items;
		nodestore = node_store;
		itemstore = create_simple_itemstore;
		broadcaster = simple_broadcast;
		itemcheck = is_item_stanza;
		check_node_config = check_node_config;
		get_affiliation = get_affiliation;

		jid = module.host;
		normalize_jid = jid_bare;
	}));
end