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lwb6/legacyworlds-server-data/db-structure/parts/050-updates/015-empire-resources.sql

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-- LegacyWorlds Beta 6
-- PostgreSQL database scripts
--
-- Game updates - empire resources
--
-- Copyright(C) 2004-2012, DeepClone Development
-- --------------------------------------------------------
/*
* Empire resources update
*
* For each empire in the update batch, compute the new amount of resources
* based on the upkeep and income from planets.
*
* FIXME: this should also include fleet upkeeps. This situation will be
* resolved once the system is modified to rely solely on resources.
*
* Parameters:
* _tick The identifier of the game update
*/
DROP FUNCTION IF EXISTS sys.process_empire_resources_updates( BIGINT );
CREATE FUNCTION sys.process_empire_resources_updates( _tick BIGINT )
RETURNS VOID
STRICT VOLATILE
SECURITY INVOKER
AS $process_empire_resources_updates$
UPDATE emp.resources _emp_resources
SET empres_possessed = CASE
WHEN _emp_resources.empres_possessed + _pl_resources.pres_income - _pl_resources.pres_upkeep > 0 THEN
_emp_resources.empres_possessed + _pl_resources.pres_income - _pl_resources.pres_upkeep
ELSE
0
END ,
empres_owed = CASE
WHEN _emp_resources.empres_possessed + _pl_resources.pres_income - _pl_resources.pres_upkeep < 0 THEN
_pl_resources.pres_upkeep - _emp_resources.empres_possessed - _pl_resources.pres_income
ELSE
0
END
FROM sys.updates _upd_sys
INNER JOIN emp.updates _upd_emp
ON _upd_emp.update_id = _upd_sys.id
INNER JOIN emp.planets _emp_planets
USING ( empire_id )
INNER JOIN verse.planet_resources _pl_resources
USING ( planet_id )
WHERE _upd_sys.last_tick = $1
AND _upd_sys.status = 'PROCESSING'
AND _upd_sys.gu_type = 'EMPIRE_RESOURCES'
AND _emp_resources.empire_id = _upd_emp.empire_id
AND _emp_resources.resource_name_id = _pl_resources.resource_name_id;
$process_empire_resources_updates$ LANGUAGE SQL;
REVOKE EXECUTE
ON FUNCTION sys.process_empire_resources_updates( BIGINT )
FROM PUBLIC;