includes/banking.inc

   1 <?php
   2
   3 include_once($path_to_root . "/gl/includes/gl_db.inc");
   4
   5 //----------------------------------------------------------------------------------
   6
   7 function is_bank_account($account_code)
   8 {
   9         $sql= "SELECT account_code FROM ".TB_PREF."bank_accounts WHERE account_code='$account_code'";
  10         $result = db_query($sql, "retreive bank account currency");
  11
  12         return (db_num_rows($result) > 0);
  13 }
  14
  15 //----------------------------------------------------------------------------------
  16
  17 function is_company_currency($currency)
  18 {
  19         return (get_company_currency() == $currency);
  20 }
  21
  22 //----------------------------------------------------------------------------------
  23
  24 function get_company_currency()
  25 {
  26         $sql= "SELECT curr_default FROM ".TB_PREF."company";
  27         $result = db_query($sql, "retreive company currency");
  28
  29         if (db_num_rows($result) == 0)
  30                 display_db_error("Could not find the requested currency. Fatal.", $sql);
  31
  32         $myrow = db_fetch_row($result);
  33         return $myrow[0];
  34 }
  35
  36 //----------------------------------------------------------------------------------
  37
  38 function get_bank_account_currency($bankAccount)
  39 {
  40         $sql= "SELECT bank_curr_code FROM ".TB_PREF."bank_accounts WHERE account_code='$bankAccount'";
  41         $result = db_query($sql, "retreive bank account currency");
  42
  43         $myrow = db_fetch_row($result);
  44         return $myrow[0];
  45 }
  46
  47 //----------------------------------------------------------------------------------
  48
  49 function get_customer_currency($customer_id)
  50 {
  51     $sql = "SELECT curr_code FROM ".TB_PREF."debtors_master WHERE debtor_no = '$customer_id'";
  52
  53         $result = db_query($sql, "Retreive currency of customer $customer_id");
  54
  55         $myrow=db_fetch_row($result);
  56         return $myrow[0];
  57 }
  58
  59 //----------------------------------------------------------------------------------
  60
  61 function get_supplier_currency($supplier_id)
  62 {
  63     $sql = "SELECT curr_code FROM ".TB_PREF."suppliers WHERE supplier_id = '$supplier_id'";
  64
  65         $result = db_query($sql, "Retreive currency of supplier $supplier_id");
  66
  67         $myrow=db_fetch_row($result);
  68         return $myrow[0];
  69 }
  70
  71 //----------------------------------------------------------------------------------
  72
  73 function get_exchange_rate_from_home_currency($currency_code, $date_)
  74 {
  75         if ($currency_code == get_company_currency())
  76                 return 1.0000;
  77
  78         $date = date2sql($date_);
  79
  80         $sql = "SELECT rate_buy, max(date_) as date_ FROM ".TB_PREF."exchange_rates WHERE curr_code = '$currency_code'
  81                                 AND date_ <= '$date' GROUP BY rate_buy ORDER BY date_ Desc LIMIT 1";
  82
  83         $result = db_query($sql, "could not query exchange rates");
  84
  85         if (db_num_rows($result) == 0)
  86         {
  87                 // no stored exchange rate, just return 1
  88                 return 1.000;
  89         }
  90
  91         $myrow = db_fetch_row($result);
  92         return $myrow[0];
  93 }
  94
  95 //----------------------------------------------------------------------------------
  96
  97 function get_exchange_rate_to_home_currency($currency_code, $date_)
  98 {
  99         return 1 / get_exchange_rate_from_home_currency($currency_code, $date_);
 100 }
 101
 102 //----------------------------------------------------------------------------------
 103
 104 function to_home_currency($amount, $currency_code, $date_)
 105 {
 106         $ex_rate = get_exchange_rate_to_home_currency($currency_code, $date_);
 107         return round($amount / $ex_rate,  user_price_dec());
 108 }
 109
 110 //----------------------------------------------------------------------------------
 111
 112 function get_exchange_rate_from_to($from_curr_code, $to_curr_code, $date_)
 113 {
 114 //      echo "converting from $from_curr_code to $to_curr_code <BR>";
 115         if ($from_curr_code == $to_curr_code)
 116                 return 1.0000;
 117
 118         $home_currency = get_company_currency();
 119         if ($to_curr_code == $home_currency)
 120         {
 121                 return get_exchange_rate_to_home_currency($from_curr_code, $date_);
 122         }
 123
 124         if ($from_curr_code == $home_currency)
 125         {
 126                 return get_exchange_rate_from_home_currency($to_curr_code, $date_);
 127         }
 128
 129         // neither from or to are the home currency
 130          return get_exchange_rate_to_home_currency($from_curr_code, $date_) / get_exchange_rate_to_home_currency($to_curr_code, $date_);
 131 }
 132
 133 //--------------------------------------------------------------------------------
 134
 135 function exchange_from_to($amount, $from_curr_code, $to_curr_code, $date_)
 136 {
 137         $ex_rate = get_exchange_rate_from_to($from_curr_code, $to_curr_code, $date_);
 138         return $amount / $ex_rate;
 139 }
 140
 141 //--------------------------------------------------------------------------------
 142
 143 ?>