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         $sql = "SELECT rate_buy
  27                         FROM ".TB_PREF."exchange_rates
  28                         WHERE curr_code=".db_escape($curr_code)
  29                                 ." AND date_='$date'";
  30         $result = db_query($sql, "could not get exchange rate for $curr_code - $date_");
  31
  32         if(db_num_rows($result) == 0)
  33                 return 0;
  34         $row = db_fetch($result);
  35                 return $row[0];
  36 }
  37
  38 /*
  39         Return last exchange rate of $currency not later than $date.
  40 */
  41 function get_last_exchange_rate($curr_code, $date_)
  42 {
  43         $date = date2sql($date_);
  44
  45         $sql = "SELECT rate_buy, max(date_) as date_
  46                         FROM ".TB_PREF."exchange_rates
  47                         WHERE curr_code = ".db_escape($curr_code)."
  48                                 AND date_ <= '$date' GROUP BY rate_buy ORDER BY date_ Desc LIMIT 1";
  49
  50         $result = db_query($sql, "could not query exchange rates");
  51
  52
  53         if (db_num_rows($result) == 0)
  54                 return false;
  55
  56         return db_fetch_assoc($result);
  57 }
  58
  59 //---------------------------------------------------------------------------------------------
  60
  61 function update_exchange_rate($curr_code, $date_, $buy_rate, $sell_rate)
  62 {
  63         if (is_company_currency($curr_code))
  64                 display_db_error("Exchange rates cannot be set for company currency", "", true);
  65
  66         $date = date2sql($date_);
  67
  68         $sql = "UPDATE ".TB_PREF."exchange_rates SET rate_buy=$buy_rate, rate_sell=".db_escape($sell_rate)
  69         ." WHERE curr_code=".db_escape($curr_code)." AND date_='$date'";
  70
  71         db_query($sql, "could not add exchange rate for $curr_code");
  72 }
  73
  74 //---------------------------------------------------------------------------------------------
  75
  76 function add_exchange_rate($curr_code, $date_, $buy_rate, $sell_rate)
  77 {
  78         if (is_company_currency($curr_code))
  79                 display_db_error("Exchange rates cannot be set for company currency", "", true);
  80
  81         $date = date2sql($date_);
  82
  83         $sql = "INSERT INTO ".TB_PREF."exchange_rates (curr_code, date_, rate_buy, rate_sell)
  84                 VALUES (".db_escape($curr_code).", '$date', ".db_escape($buy_rate)
  85                 .", ".db_escape($sell_rate).")";
  86         db_query($sql, "could not add exchange rate for $curr_code");
  87 }
  88
  89 //---------------------------------------------------------------------------------------------
  90
  91 function add_new_exchange_rate($curr_code, $date_, $ex_rate)
  92 {
  93         if (is_company_currency($curr_code) || !$ex_rate)
  94                 return;
  95
  96         if (!get_date_exchange_rate($curr_code, $date_))
  97                 add_exchange_rate($curr_code, $date_, $ex_rate, $ex_rate);
  98 }
  99
 100 //---------------------------------------------------------------------------------------------
 101
 102 function delete_exchange_rate($rate_id)
 103 {
 104         $sql = "DELETE FROM ".TB_PREF."exchange_rates WHERE id=".db_escape($rate_id);
 105         db_query($sql, "could not delete exchange rate $rate_id");
 106 }
 107
 108 //-----------------------------------------------------------------------------
 109 //      Retrieve exchange rate as of date $date from external source (usually inet)
 110 //
 111 //      Exchange rate for currency revaluation purposes is defined in FA as home_currency/curr_b ratio i.e.
 112 //
 113 //      amount [home] = amount [curr] * ex_rate
 114 //
 115 function retrieve_exrate($curr_b, $date)
 116 {
 117         global $SysPrefs;
 118
 119         $xchg_rate_provider = ((isset($SysPrefs->xr_providers) && isset($SysPrefs->dflt_xr_provider))
 120                 ? $SysPrefs->xr_providers[$SysPrefs->dflt_xr_provider] : 'ECB');
 121
 122         $rate = hook_retrieve_exrate($curr_b, $date);
 123         if (is_numeric($rate))
 124                 return $rate;
 125         return get_extern_rate($curr_b, $xchg_rate_provider, $date);
 126 }
 127 //-----------------------------------------------------------------------------
 128
 129 function get_extern_rate($curr_b, $provider = 'ECB', $date)
 130 {
 131         global  $path_to_root;
 132
 133         if ($date != Today())   // no historical rates available
 134                 return 0;
 135
 136         $contents = '';
 137         $proto = 'http://';
 138         $curr_a = get_company_pref('curr_default');
 139         if ($provider == 'ECB')
 140         {
 141                 $filename = "/stats/eurofxref/eurofxref-daily.xml";
 142                 $site = "www.ecb.europa.eu";
 143                 $site_ip="172.230.157.137";
 144         }
 145         elseif ($provider == 'YAHOO')
 146         {
 147                 $filename = "/d/quotes.csv?s={$curr_a}{$curr_b}=X&f=sl1d1t1ba&e=.csv"; // new URL's for YAHOO
 148                 $site = "download.finance.yahoo.com";
 149                 $site_ip="203.84.220.151";
 150         }
 151         elseif ($provider == 'GOOGLE')
 152         {
 153                 $filename = "/bctzjpnsun/converter?a=1&from={$curr_a}&to={$curr_b}";
 154                 $site = "finance.google.com";
 155         }
 156         elseif ($provider == 'BLOOMBERG')
 157         {
 158                 $filename = "/quote/{$curr_b}{$curr_a}:CUR";
 159                 $site = "www.bloomberg.com";
 160                 $proto = 'https://';
 161                 $contents=file_get_contents($proto.$site.$filename);
 162         }
 163         if (empty($contents)) {
 164                 if (function_exists('curl_init'))
 165                 {       // first check with curl as we can set short timeout;
 166                         $retry = 1;
 167                         do {
 168                         $ch = curl_init();
 169                         curl_setopt ($ch, CURLOPT_URL, $proto.$site.$filename);
 170                         curl_setopt ($ch, CURLOPT_COOKIEJAR, VARLIB_PATH."/cookie.txt");
 171                         curl_setopt ($ch, CURLOPT_HEADER, 0);
 172                         curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
 173                         // prevent warning while safe_mode/open_basedir on (redirection doesn't occur at least on ECB page)
 174                                 if (!ini_get('safe_mode') && !ini_get('open_basedir'))
 175                                 curl_setopt ($ch, CURLOPT_FOLLOWLOCATION, 1);
 176                         curl_setopt ($ch, CURLOPT_TIMEOUT, 3);
 177                         $contents = curl_exec ($ch);
 178                         curl_close($ch);
 179                                 // due to resolver bug in some curl versions (e.g. 7.15.5)
 180                                 // try again for constant IP.
 181                                 if (isset($site_ip))
 182                                         $site=$site_ip;
 183                         } while( ($contents == '') && $retry--);
 184                 } else {
 185                         $contents = url_get_contents($proto.$site.$filename);
 186                 }
 187         }
 188         $val = '';
 189         if ($provider == 'ECB')
 190         {
 191                 $contents = str_replace ("<Cube currency='USD'", " <Cube currency='EUR' rate='1'/> <Cube currency='USD'", $contents);
 192                 $from_mask = "|<Cube\s*currency=\'" . $curr_a . "\'\s*rate=\'([\d.,]*)\'\s*/>|i";
 193                 preg_match ( $from_mask, $contents, $out );
 194                 $val_a = isset($out[1]) ? $out[1] : 0;
 195                 $val_a = str_replace ( ',', '', $val_a );
 196                 $to_mask = "|<Cube\s*currency=\'" . $curr_b . "\'\s*rate=\'([\d.,]*)\'\s*/>|i";
 197                 preg_match ( $to_mask, $contents, $out );
 198                 $val_b = isset($out[1]) ? $out[1] : 0;
 199                 $val_b = str_replace ( ',', '', $val_b );
 200                 if ($val_b)
 201                 {
 202                         $val = $val_a / $val_b;
 203                 }
 204                 else
 205                 {
 206                         $val = 0;
 207                 }
 208         }
 209         elseif ($provider == 'YAHOO')
 210         {
 211                 $array = explode(',',$contents); // New operations for YAHOO. Safer.
 212                 $val = $array[1];
 213                 if ($val != 0)
 214                         $val = 1 / $val;
 215         }
 216         elseif ($provider == 'GOOGLE')
 217         {
 218                 $val = getInnerStr($contents, '<span class=bld>', ' ');
 219                 if (empty($val) || $val+0 <= 0.0001) {
 220                         // reverse lookup on could not convert for too small values
 221             $filename = "/bctzjpnsun/converter?a=1&from={$curr_b}&to={$curr_a}";
 222             $contents = url_get_contents($proto.$site.$filename);
 223             $val = getInnerStr($contents, '<span class=bld>', ' ');
 224                 } else {
 225                         if ($val != 0)
 226                                 $val = 1 / $val;
 227                 }
 228     }
 229         elseif ($provider == 'BLOOMBERG')
 230         {
 231                 $val = getInnerStr($contents, ',"price":', ',"');
 232     }
 233         return $val;
 234 }  /* end function get_extern_rate */
 235
 236 //-----------------------------------------------------------------------------
 237
 238 function get_sql_for_exchange_rates($curr)
 239 {
 240         $sql = "SELECT date_, rate_buy, id
 241                 FROM ".TB_PREF."exchange_rates "
 242                 ."WHERE curr_code=".db_escape($curr)."
 243                  ORDER BY date_ DESC";
 244         return $sql;
 245 }
 246
 247 function getInnerStr($str, $start, $end)
 248 {
 249         // $start must be the first occurrence
 250         // $start must not be part of $end
 251         $val = '';
 252         $val = strstr($str, $start);
 253         $val = trim($val);
 254         $val = substr($val, strlen($start));
 255         $val = strtok($val, $end);
 256         return trim($val);
 257 }