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 //---------------------------------------------------------------------------------------------
  13 function get_exchange_rate($rate_id)
  14 {
  15         $sql = "SELECT * FROM ".TB_PREF."exchange_rates WHERE id=".db_escape($rate_id);
  16         $result = db_query($sql, "could not get exchange rate for $rate_id");
  17
  18         return db_fetch($result);
  19 }
  20
  21 // Retrieves buy exchange rate for given currency/date, zero if no result
  22 function get_date_exchange_rate($curr_code, $date_)
  23 {
  24         $date = date2sql($date_);
  25         $sql = "SELECT rate_buy FROM ".TB_PREF."exchange_rates WHERE curr_code=".db_escape($curr_code)
  26         ." AND date_='$date'";
  27         $result = db_query($sql, "could not get exchange rate for $curr_code - $date_");
  28
  29         if(db_num_rows($result) == 0)
  30                 return 0;
  31         $row = db_fetch($result);
  32                 return $row[0];
  33 }
  34
  35 //---------------------------------------------------------------------------------------------
  36
  37 function update_exchange_rate($curr_code, $date_, $buy_rate, $sell_rate)
  38 {
  39         if (is_company_currency($curr_code))
  40                 display_db_error("Exchange rates cannot be set for company currency", "", true);
  41
  42         $date = date2sql($date_);
  43
  44         $sql = "UPDATE ".TB_PREF."exchange_rates SET rate_buy=$buy_rate, rate_sell=".db_escape($sell_rate)
  45         ." WHERE curr_code=".db_escape($curr_code)." AND date_='$date'";
  46
  47         db_query($sql, "could not add exchange rate for $curr_code");
  48 }
  49
  50 //---------------------------------------------------------------------------------------------
  51
  52 function add_exchange_rate($curr_code, $date_, $buy_rate, $sell_rate)
  53 {
  54         if (is_company_currency($curr_code))
  55                 display_db_error("Exchange rates cannot be set for company currency", "", true);
  56
  57         $date = date2sql($date_);
  58
  59         $sql = "INSERT INTO ".TB_PREF."exchange_rates (curr_code, date_, rate_buy, rate_sell)
  60                 VALUES (".db_escape($curr_code).", '$date', ".db_escape($buy_rate)
  61                 .", ".db_escape($sell_rate).")";
  62         db_query($sql, "could not add exchange rate for $curr_code");
  63 }
  64
  65 //---------------------------------------------------------------------------------------------
  66
  67 function delete_exchange_rate($rate_id)
  68 {
  69         $sql = "DELETE FROM ".TB_PREF."exchange_rates WHERE id=".db_escape($rate_id);
  70         db_query($sql, "could not delete exchange rate $rate_id");
  71 }
  72
  73 //-----------------------------------------------------------------------------
  74 //      Retrieve exchange rate as of date $date from external source (usually inet)
  75 //
  76 function retrieve_exrate($curr_b, $date)
  77 {
  78         global $Hooks;
  79
  80         if (method_exists($Hooks, 'retrieve_exrate'))
  81                 return $Hooks->retrieve_exrate($curr_b, $date);
  82         else
  83                 return get_extern_rate($curr_b, 'ECB', $date);
  84 }
  85 //-----------------------------------------------------------------------------
  86
  87 function get_extern_rate($curr_b, $provider = 'ECB', $date)
  88 {
  89         $curr_a = get_company_pref('curr_default');
  90         if ($provider == 'ECB')
  91         {
  92                 $filename = "/stats/eurofxref/eurofxref-daily.xml";
  93                 $site = "www.ecb.int";
  94         }
  95         elseif ($provider == 'YAHOO')
  96         {
  97                 $filename = "/q?s={$curr_a}{$curr_b}=X";
  98                 $site = "finance.yahoo.com";
  99         }
 100         elseif ($provider == 'GOOGLE')
 101         {
 102                 $filename = "/finance/converter?a=1&from={$curr_a}&to={$curr_b}";
 103                 $site = "finance.google.com";
 104         }
 105         $contents = '';
 106
 107         if (function_exists('curl_init'))
 108         {       // first check with curl as we can set short timeout;
 109                 $retry = 1;
 110                 do {
 111                $ch = curl_init();
 112            curl_setopt ($ch, CURLOPT_URL, 'http://'.$site.$filename);
 113                curl_setopt ($ch, CURLOPT_COOKIEJAR, "cookie.txt");
 114            curl_setopt ($ch, CURLOPT_HEADER, 0);
 115                curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
 116            curl_setopt ($ch, CURLOPT_FOLLOWLOCATION, 1);
 117                curl_setopt ($ch, CURLOPT_TIMEOUT, 3);
 118            $contents = curl_exec ($ch);
 119                curl_close($ch);
 120                         // due to resolver bug in some curl versions (e.g. 7.15.5)
 121                         // try again for constant IP.
 122                    $site="195.128.2.97";
 123            } while( ($contents == '') && $retry--);
 124
 125         } else {
 126                 $handle = @fopen("http://".$site.$filename, 'rb');
 127                 if ($handle) {
 128                         do
 129                         {
 130                                 $data = @fread( $handle, 4096 );
 131                                 if ( strlen ( $data ) == 0 )
 132                                         break;
 133                                 $contents .= $data; // with this syntax only text will be translated, whole text with htmlspecialchars($data)
 134                         }
 135                         while (true);
 136                         @fclose( $handle );
 137                 } // end handle
 138         }
 139         if (!$contents) {
 140                 display_warning(_("Cannot retrieve currency rate from $provider page. Please set the rate manually."));
 141         }
 142         if ($provider == 'ECB')
 143         {
 144                 $contents = str_replace ("<Cube currency='USD'", " <Cube currency='EUR' rate='1'/> <Cube currency='USD'", $contents);
 145                 $from_mask = "|<Cube\s*currency=\'" . $curr_a . "\'\s*rate=\'([\d.,]*)\'\s*/>|i";
 146                 preg_match ( $from_mask, $contents, $out );
 147                 $val_a = isset($out[1]) ? $out[1] : 0;
 148                 $val_a = str_replace ( ',', '', $val_a );
 149                 $to_mask = "|<Cube\s*currency=\'" . $curr_b . "\'\s*rate=\'([\d.,]*)\'\s*/>|i";
 150                 preg_match ( $to_mask, $contents, $out );
 151                 $val_b = isset($out[1]) ? $out[1] : 0;
 152                 $val_b = str_replace ( ',', '', $val_b );
 153                 if ($val_b)
 154                 {
 155                         $val = $val_a / $val_b;
 156                 }
 157                 else
 158                 {
 159                         $val = 0;
 160                 }
 161         }
 162         elseif ($provider == 'YAHOO')
 163         {
 164                 $val = '';
 165                 if (preg_match('/Last\sTrade:(.*?)Trade\sTime/s', $contents, $matches)) {
 166                         $val = strip_tags($matches[1]);
 167                         $val = str_replace(',', '', $val);
 168                         if ($val != 0)
 169                                 $val = 1 / $val;
 170                 }
 171         }
 172         elseif ($provider == 'GOOGLE')
 173         {
 174                 $val = '';
 175                 $regexp = "%([\d|.]+)\s+{$curr_a}\s+=\s+<span\sclass=(.*)>([\d|.]+)\s+{$curr_b}\s*</span>%s";
 176                 if (preg_match($regexp, $contents, $matches))
 177                 {
 178                         $val = $matches[3];
 179                         $val = str_replace(',', '', $val);
 180                         if ($val != 0)
 181                                 $val = 1 / $val;
 182                 }
 183     }
 184         return $val;
 185 }  /* end function get_extern_rate */
 186
 187 //-----------------------------------------------------------------------------
 188
 189 function get_sql_for_exchange_rates()
 190 {
 191         $sql = "SELECT date_, rate_buy, id FROM "
 192                 .TB_PREF."exchange_rates "
 193                 ."WHERE curr_code=".db_escape($_POST['curr_abrev'])."
 194                  ORDER BY date_ DESC";
 195         return $sql;
 196 }
 197 ?>