local rostermanager = require"core.rostermanager";

local jid_join = require"util.jid".join;

local host = module.host;

local sessions = prosody.hosts[host].sessions;

-- 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);

end

module:hook("resource-bind", function(event)

	local session = event.session;

	local user = session.username;

	local user_jid = jid_join(user, host);

	for contact in pairs(sessions) do

		if contact ~= user then

			local contact_jid = jid_join(contact, host);

			if not rostermanager.is_contact_subscribed(user, host, contact_jid) then

				subscribe(contact, user);

			end

			if not rostermanager.is_contact_subscribed(contact, host, user_jid) then

				subscribe(user, contact);

			end

		end

	end

end);