view mod_adhoc_groups/mod_adhoc_groups.lua @ 3866:c0df50ce96f0

mod_rest: Handle internal http request errors early and then return Skips over attempted parsing of the payload which usually failed since the body is an error string like "connection refused", so this produced useless errors.
author Kim Alvefur <zash@zash.se>
date Sat, 25 Jan 2020 20:22:12 +0100
parents d8325dfb6a13
children 0d7293c37e1a
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local rostermanager = require"core.rostermanager";
local jid_join = require"util.jid".join;
local jid_split = require"util.jid".split;
local host = module.host;
local st = require "util.stanza";

local groups = module:open_store("groups");
local memberships = module:open_store("groups", "map");

module:depends("adhoc");

local adhoclib = module:require "adhoc";
local dataform = require"util.dataforms";
local adhoc_inital_data = require "util.adhoc".new_initial_data_form;

-- Make a *one-way* subscription. User will see when contact is online,
-- contact will not see when user is online.
local function subscribe(user, contact)
	local user_jid, contact_jid = jid_join(user, host), jid_join(contact, host);

	-- Update user's roster to say subscription request is pending...
	rostermanager.set_contact_pending_out(user, host, contact_jid);
	-- Update contact's roster to say subscription request is pending...
	rostermanager.set_contact_pending_in(contact, host, user_jid);
	-- Update contact's roster to say subscription request approved...
	rostermanager.subscribed(contact, host, user_jid);
	-- Update user's roster to say subscription request approved...
	rostermanager.process_inbound_subscription_approval(user, host, contact_jid);

	-- Push updates to both rosters
	rostermanager.roster_push(user, host, contact_jid);
	rostermanager.roster_push(contact, host, user_jid);

	module:send(st.presence({ type = "probe", from = user_jid, to = contact_jid }));
end

local create_form = dataform.new {
	title = "Create a new group";
	{
		type = "hidden";
		name = "FORM_TYPE";
		value = "xmpp:zash.se/adhoc_groups#new";
	};
	{
		type = "text-single";
		name = "group";
		label = "Name of group";
		required = true;
	};
};

local join_form = dataform.new {
	title = "Pick the group to join";
	{
		type = "hidden";
		name = "FORM_TYPE";
		value = "xmpp:zash.se/adhoc_groups#join";
	};
	{
		type = "list-single";
		name = "group";
		label = "Available groups";
		required = true;
	};
};

local function _(f)
	return function (fields, form_err, data)
		local ok, message = f(fields, form_err, data);
		if ok then
			return { status = "completed", info = message };
		else
			return { status = "completed", error = { message = message} };
		end
	end
end

module:add_item("adhoc",
	adhoclib.new("Create group",
		"xmpp:zash.se/adhoc_groups#new",
		adhoc_inital_data(create_form,
			function ()
				return {};
			end,
			_(function (fields, form_err, data)
				local user = jid_split(data.from);
				if form_err then
					return false, "Problem in submitted form";
				end

				local group, err = groups:get(fields.group);
				if group then
					if err then
						return false, "An error occurred on the server. Please try again later.";
					else
						return false, "That group already exists";
					end
				end

				if not groups:set(fields.group, { [user] = true }) then
					return false, "An error occurred while creating the group";
				end

				return true, ("The %s group has been created"):format(fields.group);
			end)), "local_user")); -- Maybe admins only?

module:add_item("adhoc",
	adhoclib.new("Join group",
		"xmpp:zash.se/adhoc_groups#join",
		adhoc_inital_data(join_form,
			function ()
				local group_list = {};
				for group in groups:users() do
					table.insert(group_list, group);
					module:log("debug", "Group: %q", group);
				end
				table.sort(group_list);
				return { group = group_list };
			end,
			_(function (fields, form_err, data)
				local user = jid_split(data.from);
				if form_err then
					return false, "Problem in submitted form";
				end

				local group, err = groups:get(fields.group);
				if not group then
					if err then
						return false, "An error occurred on the server. Please try again later.";
					else
						return false, "No such group";
					end
				end
				if group[data.from] then
					return false, "You are already in this group.";
				end

				if not memberships:set(fields.group, user, true) then
					return false, "An error occurred while adding you to the group";
				end

				for member in pairs(group) do
					if member ~= user then
						subscribe(user, member);
						subscribe(member, user);
					end
				end

				return true, ("Welcome to the %s group"):format(fields.group);
			end)), "local_user"));