view mod_pubsub_text_interface/mod_pubsub_text_interface.lua @ 5518:d87d0e4a8516

mod_http_oauth2: Validate the OpenID 'prompt' parameter Without support for affecting the login and consent procedure, it seems sensible to inform the client that they can't change anything with this parameter.
author Kim Alvefur <zash@zash.se>
date Mon, 05 Jun 2023 22:19:17 +0200
parents e0d0ef564095
children
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local st = require "util.stanza";
local jid = require "util.jid";
local id = require "util.id";

local pubsub = module:depends "pubsub".service;

local xmlns_quick_resp = "urn:xmpp:tmp:quick-response";
local name = module:get_option_string("name", "PubSub Service on "..module.host);
local help = name..[[

Commands:

- `help` - this help message
- `list` - list available nodes
- `subscriptions` - list nodes you are subscribed to
- `subscribe NODE` - subscribe to a node
- `unsubscribe NODE` - unsubscribe from a node]];
if pubsub.get_last_item then -- COMPAT not available in 0.10
	help = help ..  "\n- `last NODE` - send the last item (again)"
end
-- FIXME better word for "node"

local friendly_pubsub_errors = {
	["forbidden"] = "You are not allowed to do that";
	["item-not-found"] = "That node does not exist";
	["internal-server-error"] = "Something went wrong (see server logs)";
	["not-subscribed"] = "You were not subscribed";
};

module:hook("message/host", function (event)
	local stanza = event.stanza;
	local body = stanza:get_child_text("body");
	if not body then return end -- bail out

	local from = stanza.attr.from;

	local reply = st.reply(stanza);
	reply.attr.id = id.medium();

	local command, node_arg = body:match("^(%a+)%s+(.*)");
	command = (command or body):lower();

	if command == "help" then
		reply:body(help):up();
		reply:tag("response", { xmlns = xmlns_quick_resp, value = "list", }):up();
		reply:tag("response", { xmlns = xmlns_quick_resp, value = "subscriptions", }):up();
	elseif command == "list" then
		local ok, nodes = pubsub:get_nodes(from);
		if ok then
			local list = {};
			for node, node_obj in pairs(nodes) do
				table.insert(list, ("- `%s` %s"):format(node, node_obj.config.title or ""));
			end
			reply:body(table.concat(list, "\n"));
		else
			reply:body(friendly_pubsub_errors[nodes] or nodes);
		end
	elseif command == "subscriptions" then
		local ok, subs = pubsub:get_subscriptions(nil, from, from);
		if not ok then
			reply:body(friendly_pubsub_errors[subs] or subs);
		elseif #subs == 0 then
			reply:body("You are not subscribed to anything from this pubsub service");
		else
			local response = {};
			for i = 1, #subs do
				response[i] = string.format("- `%s`", subs[i].node);
				reply:tag("response", { xmlns = xmlns_quick_resp, value = "unsubscribe "..subs[i].node, }):up();
				reply:tag("response", { xmlns = xmlns_quick_resp, value = "last "..subs[i].node, }):up();
			end
			reply:body(table.concat(response, "\n"));
		end
	elseif command == "subscribe" then
		local ok, err = pubsub:add_subscription(node_arg, from, jid.bare(from), { ["pubsub#include_body"] = true });
		reply:body(ok and "OK" or friendly_pubsub_errors[err] or err);
	elseif command == "unsubscribe" then
		local ok, err = pubsub:remove_subscription(node_arg, from, jid.bare(from));
		reply:body(ok and "OK" or friendly_pubsub_errors[err] or err);
	elseif command == "last" and pubsub.get_last_item then
		local ok, item_id, item = pubsub:get_last_item(node_arg, from);
		if not ok then
			reply:body(friendly_pubsub_errors[item_id] or item_id);
		elseif not item_id then
			reply:body("That node does not contain any items");
		else
			pubsub.config.broadcaster("items", node_arg, {
				[from] = { ["pubsub#include_body"] = true }
			}, item, nil, pubsub.nodes[node_arg]);
			reply:body("OK");
		end
	else
		reply:body("Unknown command. `help` to list commands."):up();
		reply:tag("response", { xmlns = xmlns_quick_resp, value = "help", }):up();
	end
	reply:reset();

	if stanza:get_child("no-copy", "urn:xmpp:hints") then
		reply:tag("no-copy", { xmlns = "urn:xmpp:hints" }):up();
	end

	if stanza:get_child("no-store", "urn:xmpp:hints") then
		reply:tag("no-store", { xmlns = "urn:xmpp:hints" }):up();
	end

	module:send(reply);
	return true;
end);