0); } //---------------------------------------------------------------------------------- function is_company_currency($currency) { return (get_company_currency() == $currency); } //---------------------------------------------------------------------------------- function get_company_currency() { $sql= "SELECT curr_default FROM ".TB_PREF."company"; $result = db_query($sql, "retreive company currency"); if (db_num_rows($result) == 0) display_db_error("Could not find the requested currency. Fatal.", $sql); $myrow = db_fetch_row($result); return $myrow[0]; } //---------------------------------------------------------------------------------- function get_bank_account_currency($bankAccount) { $sql= "SELECT bank_curr_code FROM ".TB_PREF."bank_accounts WHERE account_code='$bankAccount'"; $result = db_query($sql, "retreive bank account currency"); $myrow = db_fetch_row($result); return $myrow[0]; } //---------------------------------------------------------------------------------- function get_customer_currency($customer_id) { $sql = "SELECT curr_code FROM ".TB_PREF."debtors_master WHERE debtor_no = '$customer_id'"; $result = db_query($sql, "Retreive currency of customer $customer_id"); $myrow=db_fetch_row($result); return $myrow[0]; } //---------------------------------------------------------------------------------- function get_supplier_currency($supplier_id) { $sql = "SELECT curr_code FROM ".TB_PREF."suppliers WHERE supplier_id = '$supplier_id'"; $result = db_query($sql, "Retreive currency of supplier $supplier_id"); $myrow=db_fetch_row($result); return $myrow[0]; } //---------------------------------------------------------------------------------- function get_exchange_rate_from_home_currency($currency_code, $date_) { if ($currency_code == get_company_currency()) return 1.0000; $date = date2sql($date_); $sql = "SELECT rate_buy, max(date_) as date_ FROM ".TB_PREF."exchange_rates WHERE curr_code = '$currency_code' AND date_ <= '$date' GROUP BY rate_buy ORDER BY date_ Desc LIMIT 1"; $result = db_query($sql, "could not query exchange rates"); if (db_num_rows($result) == 0) { // no stored exchange rate, just return 1 return 1.000; } $myrow = db_fetch_row($result); return $myrow[0]; } //---------------------------------------------------------------------------------- function get_exchange_rate_to_home_currency($currency_code, $date_) { return 1 / get_exchange_rate_from_home_currency($currency_code, $date_); } //---------------------------------------------------------------------------------- function to_home_currency($amount, $currency_code, $date_) { $ex_rate = get_exchange_rate_to_home_currency($currency_code, $date_); return $amount / $ex_rate; } //---------------------------------------------------------------------------------- function get_exchange_rate_from_to($from_curr_code, $to_curr_code, $date_) { // echo "converting from $from_curr_code to $to_curr_code
"; if ($from_curr_code == $to_curr_code) return 1.0000; $home_currency = get_company_currency(); if ($to_curr_code == $home_currency) { return get_exchange_rate_to_home_currency($from_curr_code, $date_); } if ($from_curr_code == $home_currency) { return get_exchange_rate_from_home_currency($to_curr_code, $date_); } // neither from or to are the home currency return get_exchange_rate_to_home_currency($from_curr_code, $date_) / get_exchange_rate_to_home_currency($to_curr_code, $date_); } //-------------------------------------------------------------------------------- function exchange_from_to($amount, $from_curr_code, $to_curr_code, $date_) { $ex_rate = get_exchange_rate_from_to($from_curr_code, $to_curr_code, $date_); return $amount / $ex_rate; } //-------------------------------------------------------------------------------- ?>