<?php

//-------------------------------------------------------------------------------------------------------------

function add_supp_trans($type, $supplier_id, $date_, $due_date, $reference, $supp_reference,
	$amount, $amount_tax, $discount, $err_msg="", $rate=0)
{
	$date = date2sql($date_);
	if ($due_date == "")
		$due_date = "0000-00-00";
	else
		$due_date = date2sql($due_date);

	$trans_no = get_next_trans_no($type);

	$curr = get_supplier_currency($supplier_id);
	
	if ($rate == 0)
		$rate = get_exchange_rate_from_home_currency($curr, $date_);


	$sql = "INSERT INTO ".TB_PREF."supp_trans (trans_no, type, supplier_id, tran_date, due_date,
		reference, supp_reference, ov_amount, ov_gst, rate, ov_discount) ";
	$sql .= "VALUES ($trans_no, $type, $supplier_id, '$date', '$due_date',
		".db_escape($reference).", ".db_escape($supp_reference).", $amount, $amount_tax, $rate, $discount)";

	if ($err_msg == "")
		$err_msg = "Cannot insert a supplier transaction record";

	db_query($sql, $err_msg);

	return $trans_no;
}

//-------------------------------------------------------------------------------------------------------------

function get_supp_trans($trans_no, $trans_type=-1)
{
	$sql = "SELECT ".TB_PREF."supp_trans.*, (".TB_PREF."supp_trans.ov_amount+".TB_PREF."supp_trans.ov_gst+".TB_PREF."supp_trans.ov_discount) AS Total,
		".TB_PREF."suppliers.supp_name AS supplier_name, ".TB_PREF."suppliers.curr_code AS SupplierCurrCode ";

	if ($trans_type == 22)
	{
		// it's a payment so also get the bank account
		$sql .= ", ".TB_PREF."bank_accounts.bank_name, ".TB_PREF."bank_accounts.bank_account_name, ".TB_PREF."bank_accounts.bank_curr_code,
			".TB_PREF."bank_trans_types.name AS BankTransType, ".TB_PREF."bank_trans.amount AS BankAmount,
			".TB_PREF."bank_trans.ref ";
	}

	$sql .= " FROM ".TB_PREF."supp_trans, ".TB_PREF."suppliers ";

	if ($trans_type == 22)
	{
		// it's a payment so also get the bank account
		$sql .= ", ".TB_PREF."bank_trans, ".TB_PREF."bank_accounts, ".TB_PREF."bank_trans_types ";
	}

	$sql .= " WHERE ".TB_PREF."supp_trans.trans_no=$trans_no
		AND ".TB_PREF."supp_trans.supplier_id=".TB_PREF."suppliers.supplier_id";

	if ($trans_type > 0)
		$sql .= " AND ".TB_PREF."supp_trans.type=$trans_type ";

	if ($trans_type == 22)
	{
		// it's a payment so also get the bank account
		$sql .= " AND ".TB_PREF."bank_trans.trans_no =$trans_no
			AND ".TB_PREF."bank_trans.type=$trans_type
			AND ".TB_PREF."bank_trans_types.id = ".TB_PREF."bank_trans.bank_trans_type_id
			AND ".TB_PREF."bank_accounts.account_code=".TB_PREF."bank_trans.bank_act ";
	}

	$result = db_query($sql, "Cannot retreive a supplier transaction");

    if (db_num_rows($result) == 0)
    {
       // can't return nothing
       display_db_error("no supplier trans found for given params", $sql, true);
       exit;
    }

    if (db_num_rows($result) > 1)
    {
       // can't return multiple
       display_db_error("duplicate supplier transactions found for given params", $sql, true);
       exit;
    }

    return db_fetch($result);
}

//----------------------------------------------------------------------------------------

function get_supplier_transactions($extra_fields=null, $extra_conditions=null, $extra_tables=null)
{
	$sql = "SELECT ".TB_PREF."supp_trans.*,
		ov_amount+ov_gst+ov_discount AS Total,
		".TB_PREF."suppliers.supp_name, ".TB_PREF."suppliers.address,
		".TB_PREF."suppliers.curr_code ";

	if ($extra_fields)
		$sql .= ", $extra_fields ";

	$sql .= " FROM ".TB_PREF."supp_trans, ".TB_PREF."suppliers ";
	if ($extra_tables)
		$sql .= " ,$extra_tables ";

	$sql .= " WHERE ".TB_PREF."supp_trans.supplier_id=".TB_PREF."suppliers.supplier_id";

	if ($extra_conditions)
		$sql .= " AND $extra_conditions ";

	$sql .= " ORDER BY trans_no";

	return db_query($sql, "Cannot retreive supplier transactions");
}

//----------------------------------------------------------------------------------------

function exists_supp_trans($type, $type_no)
{
	if ($type == 25)
		return exists_grn($type_no);

	$sql = "SELECT trans_no FROM ".TB_PREF."supp_trans WHERE type=$type
		AND trans_no=$type_no";
	$result = db_query($sql, "Cannot retreive a supplier transaction");

    return (db_num_rows($result) > 0);
}

//----------------------------------------------------------------------------------------

function void_supp_trans($type, $type_no)
{
	$sql = "UPDATE ".TB_PREF."supp_trans SET ov_amount=0, ov_discount=0, ov_gst=0,
		alloc=0 WHERE type=$type AND trans_no=$type_no";

	db_query($sql, "could not void supp transactions for type=$type and trans_no=$type_no");
}

//----------------------------------------------------------------------------------------

function post_void_supp_trans($type, $type_no)
{
	if ($type == 22)
	{
		void_supp_payment($type, $type_no);
		return true;
	}

	if ($type == 20 || $type == 21)
	{
	 	void_supp_invoice($type, $type_no);
		return true;
	}

	if ($type == 25)
	{
	 	return void_grn($type_no);
	}

	return false;
}

//----------------------------------------------------------------------------------------

?>