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         Return last exchange rate of $currency not later than $date.
  38 */
  39 function get_last_exchange_rate($curr_code, $date_)
  40 {
  41         $date = date2sql($date_);
  42
  43         $sql = "SELECT rate_buy, max(date_) as date_ FROM ".TB_PREF."exchange_rates WHERE curr_code = ".db_escape($curr_code)."
  44                                 AND date_ <= '$date' GROUP BY rate_buy ORDER BY date_ Desc LIMIT 1";
  45
  46         $result = db_query($sql, "could not query exchange rates");
  47
  48
  49         if (db_num_rows($result) == 0)
  50                 return false;
  51
  52         return db_fetch_assoc($result);
  53 }
  54
  55 //---------------------------------------------------------------------------------------------
  56
  57 function update_exchange_rate($curr_code, $date_, $buy_rate, $sell_rate)
  58 {
  59         if (is_company_currency($curr_code))
  60                 display_db_error("Exchange rates cannot be set for company currency", "", true);
  61
  62         $date = date2sql($date_);
  63
  64         $sql = "UPDATE ".TB_PREF."exchange_rates SET rate_buy=$buy_rate, rate_sell=".db_escape($sell_rate)
  65         ." WHERE curr_code=".db_escape($curr_code)." AND date_='$date'";
  66
  67         db_query($sql, "could not add exchange rate for $curr_code");
  68 }
  69
  70 //---------------------------------------------------------------------------------------------
  71
  72 function add_exchange_rate($curr_code, $date_, $buy_rate, $sell_rate)
  73 {
  74         if (is_company_currency($curr_code))
  75                 display_db_error("Exchange rates cannot be set for company currency", "", true);
  76
  77         $date = date2sql($date_);
  78
  79         $sql = "INSERT INTO ".TB_PREF."exchange_rates (curr_code, date_, rate_buy, rate_sell)
  80                 VALUES (".db_escape($curr_code).", '$date', ".db_escape($buy_rate)
  81                 .", ".db_escape($sell_rate).")";
  82         db_query($sql, "could not add exchange rate for $curr_code");
  83 }
  84
  85 //---------------------------------------------------------------------------------------------
  86
  87 function add_new_exchange_rate($curr_code, $date_, $ex_rate)
  88 {
  89         if (is_company_currency($curr_code) || !$ex_rate)
  90                 return;
  91
  92         if (!get_date_exchange_rate($curr_code, $date_))
  93                 add_exchange_rate($curr_code, $date_, $ex_rate, $ex_rate);
  94 }
  95
  96 //---------------------------------------------------------------------------------------------
  97
  98 function delete_exchange_rate($rate_id)
  99 {
 100         $sql = "DELETE FROM ".TB_PREF."exchange_rates WHERE id=".db_escape($rate_id);
 101         db_query($sql, "could not delete exchange rate $rate_id");
 102 }
 103
 104 //-----------------------------------------------------------------------------
 105 //      Retrieve exchange rate as of date $date from external source (usually inet)
 106 //
 107 //      Exchange rate for currency revaluation purposes is defined in FA as home_currency/curr_b ratio i.e.
 108 //
 109 //      amount [home] = amount [curr] * ex_rate
 110 //
 111 function retrieve_exrate($curr_b, $date)
 112 {
 113         global $SysPrefs;
 114
 115         $xchg_rate_provider = ((isset($SysPrefs->xr_providers) && isset($SysPrefs->dflt_xr_provider))
 116                 ? $SysPrefs->xr_providers[$SysPrefs->dflt_xr_provider] : 'ECB');
 117
 118         $rate = hook_retrieve_exrate($curr_b, $date);
 119         if (is_numeric($rate))
 120                 return $rate;
 121         return get_extern_rate($curr_b, $xchg_rate_provider, $date);
 122 }
 123 //-----------------------------------------------------------------------------
 124
 125 function get_extern_rate($curr_b, $provider = 'ECB', $date)
 126 {
 127         global  $path_to_root;
 128
 129         if ($date != Today())   // no historical rates available
 130                 return 0;
 131
 132         $curr_a = get_company_pref('curr_default');
 133         if ($provider == 'ECB')
 134         {
 135                 $filename = "/stats/eurofxref/eurofxref-daily.xml";
 136                 $site = "www.ecb.europa.eu";
 137         }
 138         elseif ($provider == 'YAHOO')
 139         {
 140                 $filename = "/d/quotes.csv?s={$curr_a}{$curr_b}=X&f=sl1d1t1ba&e=.csv"; // new URL's for YAHOO
 141                 $site = "download.finance.yahoo.com";
 142         //$filename = "/q?s={$curr_a}{$curr_b}=X"; // Let old code be here for a while, Joe.
 143                 //$site = "finance.yahoo.com";
 144         }
 145         elseif ($provider == 'GOOGLE')
 146         {
 147                 $filename = "/finance/converter?a=1&from={$curr_a}&to={$curr_b}";
 148                 $site = "www.google.com";
 149         }
 150         elseif ($provider == 'BLOOMBERG')
 151         {
 152                 $filename = "/quote/{$curr_b}{$curr_a}:CUR";
 153                 $site = "www.bloomberg.com";
 154         }
 155         $contents = '';
 156         if (function_exists('curl_init'))
 157         {       // first check with curl as we can set short timeout;
 158                 $retry = 1;
 159                 do {
 160                $ch = curl_init();
 161            curl_setopt ($ch, CURLOPT_URL, 'http://'.$site.$filename);
 162                curl_setopt ($ch, CURLOPT_COOKIEJAR, "$path_to_root/tmp/cookie.txt");
 163            curl_setopt ($ch, CURLOPT_HEADER, 0);
 164                curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
 165                // prevent warning while safe_mode/open_basedir on (redireciton doesn't occur at least on ECB page)
 166                    if (!ini_get('safe_mode') && !ini_get('open_basedir'))
 167                 curl_setopt ($ch, CURLOPT_FOLLOWLOCATION, 1);
 168                curl_setopt ($ch, CURLOPT_TIMEOUT, 3);
 169            $contents = curl_exec ($ch);
 170                curl_close($ch);
 171                         // due to resolver bug in some curl versions (e.g. 7.15.5)
 172                         // try again for constant IP.
 173                    $site="172.230.157.137";
 174            } while( ($contents == '') && $retry--);
 175
 176         } else {
 177                 $contents = url_get_contents("http://".$site.$filename);
 178         }
 179         if ($provider == 'ECB')
 180         {
 181                 $contents = str_replace ("<Cube currency='USD'", " <Cube currency='EUR' rate='1'/> <Cube currency='USD'", $contents);
 182                 $from_mask = "|<Cube\s*currency=\'" . $curr_a . "\'\s*rate=\'([\d.,]*)\'\s*/>|i";
 183                 preg_match ( $from_mask, $contents, $out );
 184                 $val_a = isset($out[1]) ? $out[1] : 0;
 185                 $val_a = str_replace ( ',', '', $val_a );
 186                 $to_mask = "|<Cube\s*currency=\'" . $curr_b . "\'\s*rate=\'([\d.,]*)\'\s*/>|i";
 187                 preg_match ( $to_mask, $contents, $out );
 188                 $val_b = isset($out[1]) ? $out[1] : 0;
 189                 $val_b = str_replace ( ',', '', $val_b );
 190                 if ($val_b)
 191                 {
 192                         $val = $val_a / $val_b;
 193                 }
 194                 else
 195                 {
 196                         $val = 0;
 197                 }
 198         }
 199         elseif ($provider == 'YAHOO')
 200         {
 201                 $val = '';
 202                 $array = explode(',',$contents); // New operations for YAHOO. Safer.
 203                 $val = $array[1];
 204                 if ($val != 0)
 205                         $val = 1 / $val;
 206                 /* Let old code be here for a while, Joe.
 207                 //if (preg_match('/Last\sTrade:(.*?)Trade\sTime/s', $contents, $matches)) {
 208                         $val = strip_tags($matches[1]);
 209                         $val = str_replace(',', '', $val);
 210                         if ($val != 0)
 211                                 $val = 1 / $val;
 212                 }
 213                 */
 214         }
 215         elseif ($provider == 'GOOGLE')
 216         {
 217                 $val = '';
 218
 219                 $regexp = "%([\d|.]+)\s+{$curr_a}\s+=\s+<span\sclass=(.*)>([\d|.]+)\s+{$curr_b}\s*</span>%s";
 220                 if (preg_match($regexp, $contents, $matches))
 221                 {
 222                         $val = $matches[3];
 223                         $val = str_replace(',', '', $val);
 224                         if ($val != 0)
 225                                 $val = 1 / $val;
 226                 }
 227     }
 228         elseif ($provider == 'BLOOMBERG')
 229         {
 230                 $val = '';
 231                 $stmask = '<span class=" price">';
 232                 $val = trim(strstr($contents, $stmask));
 233                 $stmask = chr(10);
 234                 $val = trim(strstr($val, $stmask));
 235                 $val = trim(strtok($val, $stmask));
 236     }
 237         return $val;
 238 }  /* end function get_extern_rate */
 239
 240 //-----------------------------------------------------------------------------
 241
 242 function get_sql_for_exchange_rates($curr)
 243 {
 244         $sql = "SELECT date_, rate_buy, id FROM "
 245                 .TB_PREF."exchange_rates "
 246                 ."WHERE curr_code=".db_escape($curr)."
 247                  ORDER BY date_ DESC";
 248         return $sql;
 249 }