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         begin_transaction(__FUNCTION__, func_get_args());
  67
  68         $date = date2sql($date_);
  69
  70         $sql = "UPDATE ".TB_PREF."exchange_rates SET rate_buy=$buy_rate, rate_sell=".db_escape($sell_rate)
  71         ." WHERE curr_code=".db_escape($curr_code)." AND date_='$date'";
  72
  73         db_query($sql, "could not add exchange rate for $curr_code");
  74
  75         commit_transaction();
  76 }
  77
  78 //---------------------------------------------------------------------------------------------
  79
  80 function add_exchange_rate($curr_code, $date_, $buy_rate, $sell_rate)
  81 {
  82         if (is_company_currency($curr_code))
  83                 display_db_error("Exchange rates cannot be set for company currency", "", true);
  84
  85         begin_transaction(__FUNCTION__, func_get_args());
  86         $date = date2sql($date_);
  87
  88         $sql = "INSERT INTO ".TB_PREF."exchange_rates (curr_code, date_, rate_buy, rate_sell)
  89                 VALUES (".db_escape($curr_code).", '$date', ".db_escape($buy_rate)
  90                 .", ".db_escape($sell_rate).")";
  91         db_query($sql, "could not add exchange rate for $curr_code");
  92         commit_transaction();
  93 }
  94
  95 //---------------------------------------------------------------------------------------------
  96
  97 function add_new_exchange_rate($curr_code, $date_, $ex_rate)
  98 {
  99         if (is_company_currency($curr_code) || !$ex_rate)
 100                 return;
 101
 102         if (!get_date_exchange_rate($curr_code, $date_))
 103                 add_exchange_rate($curr_code, $date_, $ex_rate, $ex_rate);
 104 }
 105
 106 //---------------------------------------------------------------------------------------------
 107
 108 function delete_exchange_rate($rate_id)
 109 {
 110         begin_transaction(__FUNCTION__, func_get_args());
 111
 112         $sql = "DELETE FROM ".TB_PREF."exchange_rates WHERE id=".db_escape($rate_id);
 113         db_query($sql, "could not delete exchange rate $rate_id");
 114
 115         commit_transaction();
 116 }
 117
 118 //-----------------------------------------------------------------------------
 119 //      Retrieve exchange rate as of date $date from external source (usually inet)
 120 //
 121 //      Exchange rate for currency revaluation purposes is defined in FA as home_currency/curr_b ratio i.e.
 122 //
 123 //      amount [home] = amount [curr] * ex_rate
 124 //
 125 function retrieve_exrate($curr_b, $date)
 126 {
 127         global $SysPrefs;
 128
 129         $xchg_rate_provider = ((isset($SysPrefs->xr_providers) && isset($SysPrefs->dflt_xr_provider))
 130                 ? $SysPrefs->xr_providers[$SysPrefs->dflt_xr_provider] : 'ECB');
 131
 132         $rate = hook_retrieve_exrate($curr_b, $date);
 133         if (is_numeric($rate))
 134                 return $rate;
 135         return get_extern_rate($curr_b, $xchg_rate_provider, $date);
 136 }
 137 //-----------------------------------------------------------------------------
 138
 139 function get_extern_rate($curr_b, $provider = 'ECB', $date)
 140 {
 141         global  $path_to_root;
 142
 143         if ($date != Today())   // no historical rates available
 144                 return 0;
 145
 146         $contents = '';
 147         $proto = 'http://';
 148         $curr_a = get_company_pref('curr_default');
 149         if ($provider == 'ECB')
 150     {
 151         $filename = "/stats/eurofxref/eurofxref-daily.xml";
 152         $site = "www.ecb.europa.eu";
 153         $proto = 'https://';
 154         $site_ip="172.230.157.137";
 155         $contents=file_get_contents($proto.$site.$filename);
 156     }
 157         elseif ($provider == 'YAHOO')
 158         {
 159                 $filename = "/d/quotes.csv?s={$curr_a}{$curr_b}=X&f=sl1d1t1ba&e=.csv"; // new URL's for YAHOO
 160                 $site = "download.finance.yahoo.com";
 161                 $site_ip="203.84.220.151";
 162         }
 163         elseif ($provider == 'GOOGLE')
 164         {
 165                 $filename = "/search?q={$curr_b}+to+{$curr_a}";
 166                 $site = "https://www.google.com";
 167                 $contents = file_get_contents($site.$filename);
 168         }
 169         elseif ($provider == 'BLOOMBERG')
 170         {
 171                 $filename = "/quote/{$curr_b}{$curr_a}:CUR";
 172                 $site = "www.bloomberg.com";
 173                 $proto = 'https://';
 174                 $contents=file_get_contents($proto.$site.$filename);
 175         }
 176         elseif ($provider == 'EXCHANGE-RATES.ORG')
 177         {
 178                 $filename = "/converter/{$curr_b}/{$curr_a}/1";
 179                 $site = "exchange-rates.org";
 180                 $proto = 'https://';
 181                 $contents=file_get_contents($proto.$site.$filename);
 182         }
 183         if (empty($contents)) {
 184                 if (function_exists('curl_init'))
 185                 {       // first check with curl as we can set short timeout;
 186                         $retry = 1;
 187                         do {
 188                         $ch = curl_init();
 189                         curl_setopt ($ch, CURLOPT_URL, $proto.$site.$filename);
 190                         curl_setopt ($ch, CURLOPT_COOKIEJAR, VARLIB_PATH."/cookie.txt");
 191                         curl_setopt ($ch, CURLOPT_HEADER, 0);
 192                         curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
 193                         // prevent warning while safe_mode/open_basedir on (redirection doesn't occur at least on ECB page)
 194                                 if (!ini_get('safe_mode') && !ini_get('open_basedir'))
 195                                 curl_setopt ($ch, CURLOPT_FOLLOWLOCATION, 1);
 196                         curl_setopt ($ch, CURLOPT_TIMEOUT, 3);
 197                         $contents = curl_exec ($ch);
 198                         curl_close($ch);
 199                                 // due to resolver bug in some curl versions (e.g. 7.15.5)
 200                                 // try again for constant IP.
 201                                 if (isset($site_ip))
 202                                         $site=$site_ip;
 203                         } while( ($contents == '') && $retry--);
 204                 } else {
 205                         $contents = url_get_contents($proto.$site.$filename);
 206                 }
 207         }
 208         $val = '';
 209         if ($provider == 'ECB')
 210         {
 211                 $contents = str_replace ("<Cube currency='USD'", " <Cube currency='EUR' rate='1'/> <Cube currency='USD'", $contents);
 212                 $from_mask = "|<Cube\s*currency=\'" . $curr_a . "\'\s*rate=\'([\d.,]*)\'\s*/>|i";
 213                 preg_match ( $from_mask, $contents, $out );
 214                 $val_a = isset($out[1]) ? $out[1] : 0;
 215                 $val_a = str_replace ( ',', '', $val_a );
 216                 $to_mask = "|<Cube\s*currency=\'" . $curr_b . "\'\s*rate=\'([\d.,]*)\'\s*/>|i";
 217                 preg_match ( $to_mask, $contents, $out );
 218                 $val_b = isset($out[1]) ? $out[1] : 0;
 219                 $val_b = str_replace ( ',', '', $val_b );
 220                 if ($val_b)
 221                 {
 222                         $val = $val_a / $val_b;
 223                 }
 224                 else
 225                 {
 226                         $val = 0;
 227                 }
 228         }
 229         elseif ($provider == 'YAHOO')
 230         {
 231                 $array = explode(',',$contents); // New operations for YAHOO. Safer.
 232                 $val = $array[1];
 233                 if ($val != 0)
 234                         $val = 1 / $val;
 235         }
 236         elseif ($provider == 'GOOGLE')
 237         {
 238                 $data = preg_split('/\D\s(.*?)\s=\s/', $contents);
 239                 $array = explode(" ", $data[1]);
 240                 $exRate = $array[0];
 241
 242                 $val = str_replace (',', '', $exRate);
 243     }
 244         elseif ($provider == 'BLOOMBERG')
 245         {
 246                 $val = getInnerStr($contents, ',"price":', ',"');
 247     }
 248     elseif ($provider == 'EXCHANGE-RATES.ORG')
 249         {
 250                 $val = getInnerStr($contents, '<span id="ctl00_M_lblToAmount">', '<');
 251                 $val = str_replace (',', '', $val);
 252     }
 253         return $val;
 254 }  /* end function get_extern_rate */
 255
 256 //-----------------------------------------------------------------------------
 257
 258 function get_sql_for_exchange_rates($curr)
 259 {
 260         $sql = "SELECT date_, rate_buy, id
 261                 FROM ".TB_PREF."exchange_rates "
 262                 ."WHERE curr_code=".db_escape($curr)."
 263                  ORDER BY date_ DESC";
 264         return $sql;
 265 }
 266
 267 function getInnerStr($str, $start, $end)
 268 {
 269         // $start must be the first occurrence
 270         // $start must not be part of $end
 271         $val = '';
 272         $val = strstr($str, $start);
 273         $val = trim($val);
 274         $val = substr($val, strlen($start));
 275         $val = strtok($val, $end);
 276         return trim($val);
 277 }