Merged changes from stable branch up to 2.3.12
[fa-stable.git] / includes / db / connect_db.inc
index b0c33f6489c30f2fbf18368a822cfc0bd0027d41..ec9e3816fa9d05323df237ad206efb2f9e65a81b 100644 (file)
     See the License here <http://www.gnu.org/licenses/gpl-3.0.html>.
 ***********************************************************************/
 
+/*
+       Converts encoding name to mysql standard.
+*/
+function get_mysql_encoding_name($encoding)
+{
+       $db_encoding = array(
+               'UTF-8' => 'utf8',
+               'ISO-8859-1' => 'latin1',
+               'ISO-8859-2' => 'latin2',
+               'ISO-8859-7' => 'greek',
+               'ISO-8859-8' => 'hebrew',
+               'ISO-8859-9' => 'latin5',
+               'ISO-8859-13' => 'latin7',
+               'KOI8-R' => 'koi8r',
+               'KOI8-U' => 'koi8u',
+               'CP850' => 'cp850',
+               'CP866' => 'cp866',
+               'CP932' => 'cp932',
+               'CP1250' => 'cp1250',
+               'CP1251' => 'cp1251',
+               'CP1252' => 'latin1',
+               'CP1256' => 'cp1256',
+               'CP1257' => 'cp1257',
+               'GB2312' => 'gb2312',
+               'EUC-JP' => 'ujis',
+               'EUC-KR' => 'euckr',
+               'BIG5' => 'big5',
+               'GBK' => 'gbk',
+               'SHIFT_JIS' => 'sjis',
+               'TIS-620' => 'tis620',
+               'ASCII' => 'ascii',
+       );
+       $encoding = strtoupper($encoding);
+
+       return isset($db_encoding[$encoding]) ? $db_encoding[$encoding] : null;
+}
+
+/*
+       Returns 'best' collation for various locale language codes
+*/
+function get_mysql_collation($lang=null)
+{
+       if (!$lang)
+               $lang = substr($_SESSION['language']->code, 0, 2);
+
+       $db_collation = array(
+               'is' => 'icelandic',
+               'lv' => 'latvian',
+               'ro' => 'romanian',
+               'sl' => 'slovenian',
+               'pl' => 'polish',
+               'et' => 'estonian',
+               'es' => 'spanish', // or 'spanish2',
+               'sw' => 'swedish',
+               'tr' => 'turkish',
+               'cs' => 'czech',
+               'da' => 'danish',
+               'lt' => 'lithuanian',
+               'sk' => 'slovak',
+               'sp' => 'spanish2',
+               'fa' => 'persian',
+               'hu' => 'hungarian',
+               'fr' => 'roman',
+               'it' => 'roman',
+       );
+
+       return 'utf8_'.(isset($db_collation[$lang]) ? $db_collation[$lang] : 'general').'_ci';
+}
+/*
+       Later we assume that database with version less than 2.4 is old database, 
+       which is subject to invalid encodings on text columns,
+       so no SET NAMES or equivalent should be used.
+*/
+function db_fixed()
+{
+       $result = db_query("SELECT value FROM ".TB_PREF."sys_prefs WHERE name='version_id'");
+       $data = db_fetch($result);
+       return !db_num_rows($result) // new database is fixed by default 
+               || ($data[0] > "2.3rc");
+}
+/*
+       Check database default charset.
+*/
+function db_get_charset()
+{
+       $result = db_query("SELECT @@character_set_database");
+       $var = db_fetch($result);
+       return $var[0];
+}
+
+/*
+       Set mysql client encoding.
+       Default is is encoding used by default language.
+*/
+function db_set_encoding($ui_encoding=null)
+{
+       global $dflt_lang, $installed_languages;
+
+       if (!isset($ui_encoding))
+       {
+               $lang = array_search_value($dflt_lang, $installed_languages, 'code');
+               $ui_encoding = strtoupper($lang['encoding']);
+       }
+
+       if ($mysql_enc = get_mysql_encoding_name($ui_encoding))
+               mysql_set_charset($mysql_enc);
+}
+
+/*
+       Connects application to company database.
+*/
 function set_global_connection($company=-1)
 {
-       global $db, $transaction_level, $db_connections;
+       global $db, $transaction_level, $path_to_root;
+       global  $db_connections;
+
+       include ($path_to_root . "/config_db.php");
+       if ($company == -1) 
+               $company = $_SESSION["wa_current_user"]->company ? $_SESSION["wa_current_user"]->company : 0;
 
        cancel_transaction(); // cancel all aborted transactions if any
        $transaction_level = 0;
 
-       if ($company == -1) 
-               $company = $_SESSION["wa_current_user"]->company;
-
        $_SESSION["wa_current_user"]->cur_con = $company;
 
        $connection = $db_connections[$company];
 
        $db = mysql_connect($connection["host"], $connection["dbuser"], $connection["dbpassword"]);
                mysql_select_db($connection["dbname"], $db);
+
        return $db;
 }
 
 $db_duplicate_error_code = 1062;
 
-//DB wrapper functions to change only once for whole application
-
 function db_query($sql, $err_msg=null)
 {
        global $db, $show_sql, $sql_trail, $select_trail, $go_debug, $sql_queries, $Ajax,
                $db_connections, $db_last_inserted_id;
        
        // set current db prefix
-       $cur_prefix = $db_connections[$_SESSION["wa_current_user"]->cur_con]['tbpref'];
+       $comp = isset($_SESSION["wa_current_user"]->cur_con) ? $_SESSION["wa_current_user"]->cur_con : 0;
+       $cur_prefix = $db_connections[$comp]['tbpref'];
        $sql = str_replace(TB_PREF, $cur_prefix, $sql);
 
        if ($show_sql)
@@ -48,8 +161,16 @@ function db_query($sql, $err_msg=null)
                $sql_queries .= "<pre>$sql</pre>\n<hr>";
        }
 
-       $result = mysql_query($sql, $db);
-       
+       // mysql profiling
+       global $profile_sql;
+       if (@$profile_sql) get_usec();
+               $result = mysql_query($sql, $db);
+       if (@$profile_sql)
+       {
+               $profile_sql= false;
+               _vd($sql.'<br>:'.db_num_rows($result).'rows, '.get_usec());
+       }
+
        if($sql_trail) {
                $db_last_inserted_id = mysql_insert_id($db);    // preserve in case trail insert is done
                if ($select_trail || (strstr($sql, 'SELECT') === false)) {
@@ -174,7 +295,8 @@ function db_create_db($connection)
                $connection["dbuser"], $connection["dbpassword"]);
        if (!mysql_select_db($connection["dbname"], $db))
        {
-               $sql = "CREATE DATABASE IF NOT EXISTS " . $connection["dbname"] . "";
+               $sql = "CREATE DATABASE IF NOT EXISTS " . $connection["dbname"] . " COLLATE ".get_mysql_collation();
+
                if (!mysql_query($sql) || !mysql_select_db($connection["dbname"], $db))
                        return 0;
        }
@@ -214,5 +336,3 @@ function db_close($dbase = null)
                $dbase = $db;
        return mysql_close($dbase);
 }
-
-?>
\ No newline at end of file