-- # $Id$
-- # $HeadURL$
-- # $Author$

------------------------
-- Create user procedure
------------------------
DROP FUNCTION IF EXISTS create_user_if_not_exists(text);
DROP FUNCTION IF EXISTS create_user_if_not_exists(text, text);
CREATE OR REPLACE FUNCTION create_user_if_not_exists(rolename text, passw text default 'ets11de') RETURNS TEXT AS
$$
BEGIN
    IF NOT EXISTS (SELECT * FROM pg_roles WHERE rolname = rolename) THEN
        EXECUTE format('CREATE USER %s WITH PASSWORD ''%s''', rolename, passw);
        EXECUTE format('GRANT ets_ro TO %s', rolename);
        RETURN 'CREATE USER';
    ELSE
        RETURN format('USER ''%I'' ALREADY EXISTS', rolename);
    END IF;
END;
$$
LANGUAGE plpgsql;

-- Create db users and roles
CREATE ROLE ets_ro WITH PASSWORD 'ets11de';
-- SELECT create_user_if_not_exists('ets_ro');
SELECT create_user_if_not_exists('ets_admin');
SELECT create_user_if_not_exists('ets_aes');
SELECT create_user_if_not_exists('ets_asm');
SELECT create_user_if_not_exists('ets_avm');
SELECT create_user_if_not_exists('ets_bdv');
SELECT create_user_if_not_exists('ets_core');
SELECT create_user_if_not_exists('ets_exm');
SELECT create_user_if_not_exists('ets_flm');
SELECT create_user_if_not_exists('ets_flt');
SELECT create_user_if_not_exists('ets_gna');
SELECT create_user_if_not_exists('ets_ism');
SELECT create_user_if_not_exists('ets_mdm');
SELECT create_user_if_not_exists('ets_msg');
SELECT create_user_if_not_exists('ets_nom');
SELECT create_user_if_not_exists('ets_opm');
SELECT create_user_if_not_exists('ets_pdm');
SELECT create_user_if_not_exists('ets_ppm');
SELECT create_user_if_not_exists('ets_som');
SELECT create_user_if_not_exists('ets_srm');
SELECT create_user_if_not_exists('ets_tab');
SELECT create_user_if_not_exists('ets_whg');
-- user for all exercises
SELECT create_user_if_not_exists('ets_ex_00');
-- test data (uncomment if necessary)
-- SELECT create_user_if_not_exists('ets_ex_35');
-- SELECT create_user_if_not_exists('ets_ex_42');

-- grant create role to ets_admin, ets_exm
ALTER ROLE ets_admin WITH CREATEROLE;
ALTER ROLE ets_exm WITH CREATEROLE;

-- ets_ro for all global users, able to select or reference the other global schemas
GRANT ets_ro TO ets_admin, ets_core, ets_aes, ets_asm, ets_avm, ets_bdv, ets_exm, ets_flm, ets_flt, ets_gna, ets_ism, ets_mdm, ets_msg, ets_nom, ets_opm, ets_pdm, ets_ppm, ets_som, ets_srm, ets_tab, ets_whg;

-- ets_admin able to alter tables that he does not own
GRANT ets_core, ets_aes, ets_asm, ets_avm, ets_bdv, ets_flm, ets_flt, ets_gna, ets_ism, ets_mdm, ets_msg, ets_nom, ets_opm, ets_pdm, ets_ppm, ets_som, ets_srm, ets_tab, ets_whg TO ets_admin;

-- ets_exm super user of DB (same as ets_admin)
GRANT ets_admin TO ets_exm;

-- For Convenience (Backwards Usability)
CREATE USER ctc    PASSWORD 'ctc11de' CREATEROLE;
CREATE USER ctc_sv PASSWORD 'ctc11de' CREATEROLE;
CREATE USER ctc_ws PASSWORD 'ctc11de' CREATEROLE;

GRANT ets_ro TO ctc, ctc_sv;