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         $proto = 'https://';
 144         $site_ip="172.230.157.137";
 145         $contents=file_get_contents($proto.$site.$filename);
 146     }
 147         elseif ($provider == 'YAHOO')
 148         {
 149                 $filename = "/d/quotes.csv?s={$curr_a}{$curr_b}=X&f=sl1d1t1ba&e=.csv"; // new URL's for YAHOO
 150                 $site = "download.finance.yahoo.com";
 151                 $site_ip="203.84.220.151";
 152         }
 153         elseif ($provider == 'GOOGLE')
 154         {
 155                 $filename = "/bctzjpnsun/converter?a=1&from={$curr_a}&to={$curr_b}";
 156                 $site = "finance.google.com";
 157         }
 158         elseif ($provider == 'BLOOMBERG')
 159         {
 160                 $filename = "/quote/{$curr_b}{$curr_a}:CUR";
 161                 $site = "www.bloomberg.com";
 162                 $proto = 'https://';
 163                 $contents=file_get_contents($proto.$site.$filename);
 164         }
 165         elseif ($provider == 'EXCHANGE-RATES.ORG')
 166         {
 167                 $filename = "/converter/{$curr_b}/{$curr_a}/1";
 168                 $site = "exchange-rates.org";
 169                 $proto = 'https://';
 170                 $contents=file_get_contents($proto.$site.$filename);
 171         }
 172         elseif ($provider == 'CCA')
 173         {
 174                 $filename = "/api/v6/convert?q={$curr_b}_{$curr_a}&compact=y&callback=sampleCallback";
 175                 $site = "free.currencyconverterapi.com";
 176                 $proto = 'https://';
 177                 $contents=file_get_contents($proto.$site.$filename);
 178         }
 179         if (empty($contents)) {
 180                 if (function_exists('curl_init'))
 181                 {       // first check with curl as we can set short timeout;
 182                         $retry = 1;
 183                         do {
 184                         $ch = curl_init();
 185                         curl_setopt ($ch, CURLOPT_URL, $proto.$site.$filename);
 186                         curl_setopt ($ch, CURLOPT_COOKIEJAR, VARLIB_PATH."/cookie.txt");
 187                         curl_setopt ($ch, CURLOPT_HEADER, 0);
 188                         curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
 189                         // prevent warning while safe_mode/open_basedir on (redirection doesn't occur at least on ECB page)
 190                                 if (!ini_get('safe_mode') && !ini_get('open_basedir'))
 191                                 curl_setopt ($ch, CURLOPT_FOLLOWLOCATION, 1);
 192                         curl_setopt ($ch, CURLOPT_TIMEOUT, 3);
 193                         $contents = curl_exec ($ch);
 194                         curl_close($ch);
 195                                 // due to resolver bug in some curl versions (e.g. 7.15.5)
 196                                 // try again for constant IP.
 197                                 if (isset($site_ip))
 198                                         $site=$site_ip;
 199                         } while( ($contents == '') && $retry--);
 200                 } else {
 201                         $contents = url_get_contents($proto.$site.$filename);
 202                 }
 203         }
 204         $val = '';
 205         if ($provider == 'ECB')
 206         {
 207                 $contents = str_replace ("<Cube currency='USD'", " <Cube currency='EUR' rate='1'/> <Cube currency='USD'", $contents);
 208                 $from_mask = "|<Cube\s*currency=\'" . $curr_a . "\'\s*rate=\'([\d.,]*)\'\s*/>|i";
 209                 preg_match ( $from_mask, $contents, $out );
 210                 $val_a = isset($out[1]) ? $out[1] : 0;
 211                 $val_a = str_replace ( ',', '', $val_a );
 212                 $to_mask = "|<Cube\s*currency=\'" . $curr_b . "\'\s*rate=\'([\d.,]*)\'\s*/>|i";
 213                 preg_match ( $to_mask, $contents, $out );
 214                 $val_b = isset($out[1]) ? $out[1] : 0;
 215                 $val_b = str_replace ( ',', '', $val_b );
 216                 if ($val_b)
 217                 {
 218                         $val = $val_a / $val_b;
 219                 }
 220                 else
 221                 {
 222                         $val = 0;
 223                 }
 224         }
 225         elseif ($provider == 'YAHOO')
 226         {
 227                 $array = explode(',',$contents); // New operations for YAHOO. Safer.
 228                 $val = $array[1];
 229                 if ($val != 0)
 230                         $val = 1 / $val;
 231         }
 232         elseif ($provider == 'GOOGLE')
 233         {
 234                 $val = getInnerStr($contents, '<span class=bld>', ' ');
 235                 if (empty($val) || $val+0 <= 0.0001) {
 236                         // reverse lookup on could not convert for too small values
 237             $filename = "/bctzjpnsun/converter?a=1&from={$curr_b}&to={$curr_a}";
 238             $contents = url_get_contents($proto.$site.$filename);
 239             $val = getInnerStr($contents, '<span class=bld>', ' ');
 240                 } else {
 241                         if ($val != 0)
 242                                 $val = 1 / $val;
 243                 }
 244     }
 245         elseif ($provider == 'BLOOMBERG')
 246         {
 247                 $val = getInnerStr($contents, ',"price":', ',"');
 248     }
 249     elseif ($provider == 'EXCHANGE-RATES.ORG')
 250         {
 251                 $val = getInnerStr($contents, '<span id="ctl00_M_lblToAmount">', '<');
 252     }
 253     elseif ($provider == 'CCA')
 254     {
 255         $val = getInnerStr($contents, '"val":', '}');
 256     }
 257         return $val;
 258 }  /* end function get_extern_rate */
 259
 260 //-----------------------------------------------------------------------------
 261
 262 function get_sql_for_exchange_rates($curr)
 263 {
 264         $sql = "SELECT date_, rate_buy, id
 265                 FROM ".TB_PREF."exchange_rates "
 266                 ."WHERE curr_code=".db_escape($curr)."
 267                  ORDER BY date_ DESC";
 268         return $sql;
 269 }
 270
 271 function getInnerStr($str, $start, $end)
 272 {
 273         // $start must be the first occurrence
 274         // $start must not be part of $end
 275         $val = '';
 276         $val = strstr($str, $start);
 277         $val = trim($val);
 278         $val = substr($val, strlen($start));
 279         $val = strtok($val, $end);
 280         return trim($val);
 281 }