gl/includes/db/gl_db_rates.inc

   1 <?php
   2 /**********************************************************************
   3     Copyright (C) FrontAccounting, LLC.
   4         Released under the terms of the GNU General Public License, GPL,
   5         as published by the Free Software Foundation, either version 3
   6         of the License, or (at your option) any later version.
   7     This program is distributed in the hope that it will be useful,
   8     but WITHOUT ANY WARRANTY; without even the implied warranty of
   9     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  10     See the License here <http://www.gnu.org/licenses/gpl-3.0.html>.
  11 ***********************************************************************/
  12 include_once($path_to_root . "/includes/remote_url.inc");
  13 //---------------------------------------------------------------------------------------------
  14 function get_exchange_rate($rate_id)
  15 {
  16         $sql = "SELECT * FROM ".TB_PREF."exchange_rates WHERE id=".db_escape($rate_id);
  17         $result = db_query($sql, "could not get exchange rate for $rate_id");
  18
  19         return db_fetch($result);
  20 }
  21
  22 // Retrieves buy exchange rate for given currency/date, zero if no result
  23 function get_date_exchange_rate($curr_code, $date_)
  24 {
  25         $date = date2sql($date_);
  26         $sql = "SELECT rate_buy FROM ".TB_PREF."exchange_rates WHERE curr_code=".db_escape($curr_code)
  27         ." AND date_='$date'";
  28         $result = db_query($sql, "could not get exchange rate for $curr_code - $date_");
  29
  30         if(db_num_rows($result) == 0)
  31                 return 0;
  32         $row = db_fetch($result);
  33                 return $row[0];
  34 }
  35
  36 //---------------------------------------------------------------------------------------------
  37
  38 function update_exchange_rate($curr_code, $date_, $buy_rate, $sell_rate)
  39 {
  40         if (is_company_currency($curr_code))
  41                 display_db_error("Exchange rates cannot be set for company currency", "", true);
  42
  43         $date = date2sql($date_);
  44
  45         $sql = "UPDATE ".TB_PREF."exchange_rates SET rate_buy=$buy_rate, rate_sell=".db_escape($sell_rate)
  46         ." WHERE curr_code=".db_escape($curr_code)." AND date_='$date'";
  47
  48         db_query($sql, "could not add exchange rate for $curr_code");
  49 }
  50
  51 //---------------------------------------------------------------------------------------------
  52
  53 function add_exchange_rate($curr_code, $date_, $buy_rate, $sell_rate)
  54 {
  55         if (is_company_currency($curr_code))
  56                 display_db_error("Exchange rates cannot be set for company currency", "", true);
  57
  58         $date = date2sql($date_);
  59
  60         $sql = "INSERT INTO ".TB_PREF."exchange_rates (curr_code, date_, rate_buy, rate_sell)
  61                 VALUES (".db_escape($curr_code).", '$date', ".db_escape($buy_rate)
  62                 .", ".db_escape($sell_rate).")";
  63         db_query($sql, "could not add exchange rate for $curr_code");
  64 }
  65
  66 //---------------------------------------------------------------------------------------------
  67
  68 function delete_exchange_rate($rate_id)
  69 {
  70         $sql = "DELETE FROM ".TB_PREF."exchange_rates WHERE id=".db_escape($rate_id);
  71         db_query($sql, "could not delete exchange rate $rate_id");
  72 }
  73
  74 //-----------------------------------------------------------------------------
  75 //      Retrieve exchange rate as of date $date from external source (usually inet)
  76 //
  77 function retrieve_exrate($curr_b, $date)
  78 {
  79         global $Hooks;
  80
  81         if (method_exists($Hooks, 'retrieve_exrate'))
  82                 return $Hooks->retrieve_exrate($curr_b, $date);
  83         else
  84                 return get_extern_rate($curr_b, 'ECB', $date);
  85 }
  86 //-----------------------------------------------------------------------------
  87
  88 function get_extern_rate($curr_b, $provider = 'ECB', $date)
  89 {
  90         $curr_a = get_company_pref('curr_default');
  91         if ($provider == 'ECB')
  92         {
  93                 $filename = "/stats/eurofxref/eurofxref-daily.xml";
  94                 $site = "www.ecb.int";
  95         }
  96         elseif ($provider == 'YAHOO')
  97         {
  98                 $filename = "/q?s={$curr_a}{$curr_b}=X";
  99                 $site = "finance.yahoo.com";
 100         }
 101         elseif ($provider == 'GOOGLE')
 102         {
 103                 $filename = "/finance/converter?a=1&from={$curr_a}&to={$curr_b}";
 104                 $site = "finance.google.com";
 105         }
 106         $contents = '';
 107
 108         if (function_exists('curl_init'))
 109         {       // first check with curl as we can set short timeout;
 110                 $retry = 1;
 111                 do {
 112                $ch = curl_init();
 113            curl_setopt ($ch, CURLOPT_URL, 'http://'.$site.$filename);
 114                curl_setopt ($ch, CURLOPT_COOKIEJAR, "cookie.txt");
 115            curl_setopt ($ch, CURLOPT_HEADER, 0);
 116                curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
 117            curl_setopt ($ch, CURLOPT_FOLLOWLOCATION, 1);
 118                curl_setopt ($ch, CURLOPT_TIMEOUT, 3);
 119            $contents = curl_exec ($ch);
 120                curl_close($ch);
 121                         // due to resolver bug in some curl versions (e.g. 7.15.5)
 122                         // try again for constant IP.
 123                    $site="195.128.2.97";
 124            } while( ($contents == '') && $retry--);
 125
 126         } else {
 127                 $contents = url_get_contents("http://".$site.$filename);
 128         }
 129         if (!$contents) {
 130                 display_warning(_("Cannot retrieve currency rate from $provider page. Please set the rate manually."));
 131         }
 132         if ($provider == 'ECB')
 133         {
 134                 $contents = str_replace ("<Cube currency='USD'", " <Cube currency='EUR' rate='1'/> <Cube currency='USD'", $contents);
 135                 $from_mask = "|<Cube\s*currency=\'" . $curr_a . "\'\s*rate=\'([\d.,]*)\'\s*/>|i";
 136                 preg_match ( $from_mask, $contents, $out );
 137                 $val_a = isset($out[1]) ? $out[1] : 0;
 138                 $val_a = str_replace ( ',', '', $val_a );
 139                 $to_mask = "|<Cube\s*currency=\'" . $curr_b . "\'\s*rate=\'([\d.,]*)\'\s*/>|i";
 140                 preg_match ( $to_mask, $contents, $out );
 141                 $val_b = isset($out[1]) ? $out[1] : 0;
 142                 $val_b = str_replace ( ',', '', $val_b );
 143                 if ($val_b)
 144                 {
 145                         $val = $val_a / $val_b;
 146                 }
 147                 else
 148                 {
 149                         $val = 0;
 150                 }
 151         }
 152         elseif ($provider == 'YAHOO')
 153         {
 154                 $val = '';
 155                 if (preg_match('/Last\sTrade:(.*?)Trade\sTime/s', $contents, $matches)) {
 156                         $val = strip_tags($matches[1]);
 157                         $val = str_replace(',', '', $val);
 158                         if ($val != 0)
 159                                 $val = 1 / $val;
 160                 }
 161         }
 162         elseif ($provider == 'GOOGLE')
 163         {
 164                 $val = '';
 165                 $regexp = "%([\d|.]+)\s+{$curr_a}\s+=\s+<span\sclass=(.*)>([\d|.]+)\s+{$curr_b}\s*</span>%s";
 166                 if (preg_match($regexp, $contents, $matches))
 167                 {
 168                         $val = $matches[3];
 169                         $val = str_replace(',', '', $val);
 170                         if ($val != 0)
 171                                 $val = 1 / $val;
 172                 }
 173     }
 174         return $val;
 175 }  /* end function get_extern_rate */
 176
 177 //-----------------------------------------------------------------------------
 178
 179 function get_sql_for_exchange_rates()
 180 {
 181         $sql = "SELECT date_, rate_buy, id FROM "
 182                 .TB_PREF."exchange_rates "
 183                 ."WHERE curr_code=".db_escape($_POST['curr_abrev'])."
 184                  ORDER BY date_ DESC";
 185         return $sql;
 186 }
 187 ?>