--
-- This file is part of TALER
-- Copyright (C) 2021 Taler Systems SA
--
-- TALER is free software; you can redistribute it and/or modify it under the
-- terms of the GNU General Public License as published by the Free Software
-- Foundation; either version 3, or (at your option) any later version.
--
-- TALER is distributed in the hope that it will be useful, but WITHOUT ANY
-- WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
-- A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License along with
-- TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
--

*/
/**
 * @file merchant-004.sql
 * @brief database helper functions for postgres used by the merchant and funtion for plugin_merchantdb_postgres.c
 * @author Priscilla Huang
 */

-- Everything in one big transaction
BEGIN;

-- Check patch versioning is in place.
SELECT _v.register_patch('merchant-0004', NULL, NULL);

SET search_path TO merchant;

-- create table here!

CREATE TABLE IF NOT EXISTS merchant_template
  (template_serial BIGINT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY
  ,merchant_serial BIGINT NOT NULL
    REFERENCES merchant_instances (merchant_serial) ON DELETE CASCADE
  ,template_id VARCHAR NOT NULL
  ,template_description VARCHAR NOT NULL
  ,image BYTEA
  ,template_contract VARCHAR NOT NULL -- in JSON format
  ,UNIQUE (merchant_serial, template_id)
  );
COMMENT ON TABLE merchant_template  
  IS 'template used by the merchant (may be incomplete, frontend can override)';
COMMENT ON COLUMN merchant_template.template_description
  IS 'Human-readable template description';
COMMENT ON COLUMN merchant_template.image
  IS 'NOT NULL, but can be 0 bytes; must contain an ImageDataUrl';
COMMENT ON COLUMN merchant_template.template_contract
  IS 'The template contract will contains some additional information.'