-- Deploy numerus:add_expense to pg
-- requires: schema_numerus
-- requires: expense
-- requires: expense_tax
-- requires: tax
-- requires: company
-- requires: currency
-- requires: parse_price
-- requires: tax
-- requires: tag_name

begin;

set search_path to numerus, public;

create or replace function add_expense(company integer, invoice_date date, contact_id integer, invoice_number text, amount text, taxes integer[], tags tag_name[]) returns uuid as
$$
declare
	eid integer;
	eslug uuid;
begin
	insert into expense (company_id, contact_id, invoice_number, invoice_date, amount, currency_code, tags)
	select company_id
	     , contact_id
	     , invoice_number
	     , invoice_date
	     , parse_price(amount, currency.decimal_digits)
	     , currency_code
	     , tags
	from company
	join currency using (currency_code)
	where company.company_id = add_expense.company
	returning expense_id, slug
	into eid, eslug;

	insert into expense_tax (expense_id, tax_id, tax_rate)
	select eid, tax_id, tax.rate
	from tax
	join unnest(taxes) as etax(tax_id) using (tax_id);

	return eslug;
end;
$$
language plpgsql;

revoke execute on function add_expense(integer, date, integer, text, text, integer[], tag_name[]) from public;
grant execute on function add_expense(integer, date, integer, text, text, integer[], tag_name[]) to invoicer;
grant execute on function add_expense(integer, date, integer, text, text, integer[], tag_name[]) to admin;

commit;