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<?php
/**
* File translation.class.php
*
* @package Translation
*/
/**
* require dependencies
*/
require_once 'PEAR.php';
require_once 'DB.php';
/**
* Translation class
*
* Class allows storing and retrieving all the strings on multilingual site
* in a database.
* The class connects to any database using PEAR::DB extension - so it needs
* PEAR to be installed to work correctly.
* The object should be created for every page. While creation all the strings
* connected with specific page and the strings connected with all the pages
* on the site are loaded into variable, so accessing them is quite fast and
* does not overload database server connection.
* The class can reuse existing DB connections. To do so just pass to the
* constructor the handle for the connection instead of DSN.
*
* @author Wojciech Zieliński <voyteck@caffe.com.pl>
* @version 1.2.3
* @access public
* @package Translation
*/
class Translation extends PEAR {
/**
* The translations are retrieved from this class object
* @see Translation(), gstr(), getLangName(), getOtherLangs(), getMetaTags
*/
/**
* Strings of the given page array
*
* This one is for fast access to cached strings for specified page
*
* @var array string $Strings
*/
var $Strings = array();
/**
* Page identifier
*
* @var string $PageName
*/
var $PageName = '';
/**
* Language identifier
*
* @var string $LanguageID
*/
var $LanguageID = '';
/**
* Connection to database
*
* @var object DB $db
*/
var $db;
/**
* Is true if the connection was reused, not made from the class
*
* @var int $ConnectionReused
*/
var $ConnectionReused;
/**
* The string that will be displayed, if no string has been found in the
* DB for specified string_id
* @var string $ErrorText
*/
var $ErrorText;
/**
* The array with table and column names
*
* The table may have following items:
*
* 'langsavail' - table, in which all the information of the possible languages
* is kept. This array item may be the string - then the structure of the table
* remains as original, but the name is specified here; or the array with the
* following items:
* 'name' - the name of the table - default is 'tr_langsavail'
* 'lang_id' - the column that stores the language identifier - default
* is 'lang_id'
* 'lang_name' - the column that stores the language name - default
* is 'name'
* 'metatags' - the column that stores meta tags for the pages in specified
* language - default is 'metatags'
* 'errortext' - the column that stores the text that will be displayed in case
* if some text will not be found in the DB - default is 'errortext'
*
* 'strings_XX' - table, in which the strings of language "XX" (the
* corresponding lang_id) are kept. This array item may be the string - then
* the structure of the table remains as original, but the name is specified
* here; or the array with the following items:
* 'name' - the name of the table - default is 'tr_strings_XX'
* 'page_id' - the page identifier - default is 'page_id'.
* 'string_id' - the string indetifier - default is 'string_id'.
* 'string' - the string itself - default is 'string'.
*
* This parameter in fact has impact only if the DB is used as the strings
* repository. The defaults are set in the way that the method is compatible
* with lower versions.
*
* @var array $CustomTables
*/
var $TableDefinitions;
/**
* Class constructor
*
* @param string $PageName the page identifier. It identifies
* strings connected with specific page on the site
* @param string $LanguageID language id. All the languages
* are stored on the database on specific ID's.
* @since version 1.2.1
* @param string $pear_DSN This might be 3 types: the PEAR DSN
* string form making the connection; the PEAR DB connection handle;
* the string has the following format:
* gettext://LOCALE:LANG:BINDTXTDOMAIN:TXTDOMAINFILE:TXTDOMAIN:CFGFILE
* for using the native PHP gettext support.
* @param array $CustomTables This is the array of the names of the tables and
* optionally the names of columns. It contains the following elements:
*/
function Translation($PageName, $LanguageID, $pear_DSN, $CustomTables = 0)
{
$this->PageName = $PageName;
$this->LanguageID = $LanguageID;
if (!DB::isConnection($pear_DSN)) {
$this->db = DB::connect($pear_DSN);
$this->ConnectionReused = 0;
} else {
$this->db = $pear_DSN;
$this->ConnectionReused = 1;
}
if (DB::isError($this->db)) {
die ($this->db->getMessage());
}
$this->TableDefinitions = array(
'langsavail' => array(
'name' => 'tr_langsavail',
'lang_id' => 'lang_id',
'lang_name' => 'name',
'metatags' => 'metatags',
'errortext' => 'errortext'
)
);
if (is_array($CustomTables['langsavail'])) {
$this->TableDefinitions['langsavail']['name'] = isset($CustomTables['langsavail']['name']) ? $CustomTables['langsavail']['name'] : 'tr_langsavail';
$this->TableDefinitions['langsavail']['lang_id'] = isset($CustomTables['langsavail']['lang_id']) ? $CustomTables['langsavail']['lang_id'] : 'lang_id';
$this->TableDefinitions['langsavail']['lang_name'] = isset($CustomTables['langsavail']['lang_name']) ? $CustomTables['langsavail']['lang_name'] : 'lang_name';
$this->TableDefinitions['langsavail']['metatags'] = isset($CustomTables['langsavail']['metatags']) ? $CustomTables['langsavail']['metatags'] : 'metatags';
$this->TableDefinitions['langsavail']['errortext'] = isset($CustomTables['langsavail']['errortext']) ? $CustomTables['langsavail']['errortext'] : 'errortext';
} elseif (!empty($CustomTables['langsavail'])) {
$this->TableDefinitions['langsavail']['name'] = $CustomTables['langsavail'];
}
$result = $this->db->query('SELECT ' . $this->TableDefinitions['langsavail']['lang_id'] . ' FROM ' . $this->TableDefinitions['langsavail']['name']);
if (DB::isError($result)) {
die ($result->getMessage());
}
while ($row = $result->fetchRow()) {
$this->TableDefinitions['strings_'.$row[0]] = array(
'name' => 'tr_strings_'.$row[0],
'page_id' => 'page_id',
'string_id' => 'string_id',
'string' => 'string'
);
if (is_array($CustomTables['strings_'.$row[0]])) {
$this->TableDefinitions['strings_'.$row[0]]['name'] = isset($CustomTables['strings_'.$row[0]]['name']) ? $CustomTables['strings_'.$row[0]]['name'] : 'strings_'.$row[0];
$this->TableDefinitions['strings_'.$row[0]]['page_id'] = isset($CustomTables['strings_'.$row[0]]['page_id']) ? $CustomTables['strings_'.$row[0]]['page_id'] : 'page_id';
$this->TableDefinitions['strings_'.$row[0]]['string_id'] = isset($CustomTables['strings_'.$row[0]]['string_id']) ? $CustomTables['strings_'.$row[0]]['string_id'] : 'string_id';
$this->TableDefinitions['strings_'.$row[0]]['string'] = isset($CustomTables['strings_'.$row[0]]['string']) ? $CustomTables['strings_'.$row[0]]['string'] : 'string';
} elseif (!empty($CustomTables['strings_'.$row[0]])) {
$this->TableDefinitions['strings_'.$row[0]]['name'] = $CustomTables['strings_'.$row[0]];
}
}
$result = $this->db->query('SELECT ' . $this->TableDefinitions['strings_' . $LanguageID]['string_id'] . ', ' . $this->TableDefinitions['strings_' . $LanguageID]['string'] . ' FROM ' . $this->TableDefinitions['strings_' . $LanguageID]['name'] . ' WHERE ' . $this->TableDefinitions['strings_' . $LanguageID]['page_id'] . " = '$PageName' OR " . $this->TableDefinitions['strings_' . $LanguageID]['page_id'] . " = ''");
if (DB::isError($result)) {
die ($result->getMessage());
}
while ($row = $result->fetchRow()) {
$this->Strings[$row[0]] = $row[1];
}
$this->ErrorText = $this->db->getOne('SELECT ' . $this->TableDefinitions['langsavail']['errortext'] . ' FROM ' . $this->TableDefinitions['langsavail']['name'] . ' WHERE ' . $this->TableDefinitions['langsavail']['lang_id'] . " = '$LanguageID'");
}
/**
* Class destructor
*
* @since version 1.2.1
*/
function _Translation()
{
if (! $this->ConnectionReused) {
$this->db->disconnect();
}
}
/**
* Translated string retrieval
*
* Retrieves the string basing on string identifier (string_id) or by
* page_id.string_id. It means the strings_id may be specified in 2 ways:
* - as normal string_id - then the string is retrieved from the cached version
* of strings in the current page_id
* - as [page_id].[string_id] - then teh strings is retrieved from the DB by getting
* it from the given page_id. The additional optimization mechanism checks
* if the page_id is not the same, as the current - if it is - the string will still be
* retrieved from the cached version.
* Also in the Params array there can be the item 'lang_id'. If not 'action' has
* been given then the string from specified lang_id (in specified language)
* will be retrieved. This solution is not recommended for common usage
* (e.g. for the whole pages) as this will not use the cached in the constructor
* strings, but will make another query to the DB for the specified query.
* Another item that can be this array is 'action'. This specified special
* actions that should be performed. The special actions can be the following:
* 'normal' - this is default setting. It means that method will act as if this
* item was not given.
* 'translate' - this will couse, that the $StringName will not be the
* string_id, but the string itself. This must be set only together with
* 'lang_id' item. Method will try to find the specified string in the foreign
* (specified in lang_id) language and will retrieve the corresponding string in
* the current language. This solution is not recommended for common usage
* (e.g. for the whole pages) as this will not use the cached in the constructor
* strings, but will make another query to the DB for the specified query.
* Item 'optimization' is used to specify the optimization of the queries -
* if the main load should be performed by the PHP server (by doing more, but
* less complicated queries) or DB server (PHP is sending only one, but
* complicated query). This one is used only together with specified 'lang_id'
* and 'action'=>'translate' - as this performs more operations, then other
* queries. It can have following values:
* 'php' - the default setting, cousing PHP to make 2 (or 3 if the string will
* be found in some other page_id then the current) uncomplicated queries. This
* is recommened if the DB server is the same machine as the PHP server.
* 'db' - this couses PHP to make only 1, but comlicated query. This is
* recommended if the DB server is separate machine, then PHP server. WARNING:
* This will not work with MySQL DB server and Db servers, that does not
* supports nested SELECTs (SELECT ... FROM ... WHERE sth = (SELECT...))
* Another parameters that might be specified in the $Params array are:
* 'ParameterPrefix' - is the prefix string for parameter - default is '&&'
* 'ParameterPostfix' - is the postfix string for parameter - default is '&&'
*
* @param string $StringName string identifier - unique for the page as well as for the strings, that are available on all the pages.
* @param array string $Params string may be parametrized - and the paraters, that will be "inserted" into string may be typen into this array. It means, that &&1&& string will be replaced by 1st array element; string &&2&& will be replaced by 2nd array element; string &&3&& will be replaced by 3rd array element etc.
* @return string retrieved string
*/
function gstr($StringName, $Params = array())
{
if (($returnstring = $this->Strings[$StringName]) == '') {
$returnstring = $this->ErrorText;
}
if (($eregged = ereg("([_a-zA-Z]*)\.([_a-zA-Z]*)", $StringName, $regs)) && $Params['action'] != 'translate') {
if ($reg[2] == $this->PageName) {
if (($returnstring = $this->Strings[$StringName]) == '') {
$returnstring = $this->ErrorText;
}
} else {
$returnstring = $this->db->getOne('SELECT ' . $this->TableDefinitions['strings_' . $this->LanguageID]['string'] . ' FROM ' . $this->TableDefinitions['strings_' . $this->LanguageID]['name'] . ' WHERE ' . $this->TableDefinitions['strings_' . $this->LanguageID]['page_id'] . " = '" . $regs[1] . "' AND " . $this->TableDefinitions['strings_' . $this->LanguageID]['string_id'] . " = '" . $regs[2] . "'");
if (DB::isError($returnstring)) {
$returnstring = $this->ErrorText;
}
}
}
$i = 0;
if (count($Params) > 0 && ! $eregged) {
if (!empty($Params['lang_id']) && (empty($Params['action']) || $Params['action'] == 'normal')) {
$returnstring = $this->db->getOne('SELECT ' . $this->TableDefinitions['strings_' . $Params['lang_id']]['string'] . ' FROM ' . $this->TableDefinitions['strings_' . $Params['lang_id']]['name'] . ' WHERE ' . $this->TableDefinitions['strings_' . $Params['lang_id']]['page_id'] . " = '" . $this->PageName . "' AND " . $this->TableDefinitions['strings_' . $Params['lang_id']]['string_id'] . " = '" . $StringName . "'");
if (DB::isError($returnstring)) {
$returnstring = $this->ErrorText;
}
}
if (!empty($Params['lang_id']) && $Params['action'] == 'translate' && !$eregged) {
if (empty($Params['optimization']) || $Params['optimization'] == 'php') {
$PageID = $this->db->getOne('SELECT ' . $this->TableDefinitions['strings_' . $Params['lang_id']]['page_id'] . ' FROM ' . $this->TableDefinitions['strings_' . $Params['lang_id']]['name'] . ' WHERE ' . $this->TableDefinitions['strings_' . $Params['lang_id']]['string'] . " = '" . $StringName . "'");
$StringID = $this->db->getOne('SELECT ' . $this->TableDefinitions['strings_' . $Params['lang_id']]['string_id'] . ' FROM ' . $this->TableDefinitions['strings_' . $Params['lang_id']]['name'] . ' WHERE ' . $this->TableDefinitions['strings_' . $Params['lang_id']]['string'] . " = '" . $StringName . "'");
if (empty($PageID) || $PageID == $this->PageName) {
if (($returnstring = $this->Strings[$StringID]) == '') {
$returnstring = $this->ErrorText;
}
} else {
$returnstring = $this->db->getOne('SELECT ' . $this->TableDefinitions['strings_' . $this->LanguageID]['string'] . ' FROM ' . $this->TableDefinitions['strings_' . $this->LanguageID]['name'] . ' WHERE ' . $this->TableDefinitions['strings_' . $this->LanguageID]['page_id'] . " = '" . $PageID . "' AND " . $this->TableDefinitions['strings_' . $this->LanguageID]['string_id'] . " = '" . $StringID . "'");
if (DB::isError($returnstring)) {
$returnstring = $this->ErrorText;
}
}
} elseif ($Params['optimization'] == 'db') {
$returnstring = $this->db->getOne('SELECT ' . $this->TableDefinitions['strings_' . $this->LanguageID]['string'] . ' FROM ' . $this->TableDefinitions['strings_' . $this->LanguageID]['name'] . ' WHERE ' . $this->TableDefinitions['strings_' . $this->LanguageID]['page_id'] . " = (" . "SELECT " . $this->TableDefinitions['strings_' . $Params['lang_id']]['page_id'] . ' FROM ' . $this->TableDefinitions['strings_' . $Params['lang_id']]['name'] . ' WHERE ' . $this->TableDefinitions['strings_' . $Params['lang_id']]['string'] . " = '" . $StringName . "'" . ") AND " . $this->TableDefinitions['strings_' . $this->LanguageID]['string_id'] . " = (" . "SELECT " . $this->TableDefinitions['strings_' . $Params['lang_id']]['string_id'] . ' FROM ' . $this->TableDefinitions['strings_' . $Params['lang_id']]['name'] . ' WHERE ' . $this->TableDefinitions['strings_' . $Params['lang_id']]['string'] . " = '" . $StringName . "'" . ")");
if (DB::isError($returnstring)) {
$returnstring = $this->ErrorText;
}
}
}
if (!isset($Params['ParameterPrefix'])) {
$Params['ParameterPrefix'] = '&&';
}
if (!isset($Params['ParameterPostfix'])) {
$Params['ParameterPostfix'] = '&&';
}
while(!empty($Params[$i])) {
$returnstring = str_replace($Params['ParameterPrefix'] . ++$i . $Params['ParameterPostfix'], $Params[$i-1], $returnstring);
}
}
return $returnstring;
}
/**
* Active language name retrieval
*
* Retrieves the name of active language
*
* @return string current active language name or PEAR_ERROR object in case of problems
*/
function getLangName()
{
$result = $this->db->getRow('SELECT ' . $this->TableDefinitions['langsavail']['lang_name'] . ' FROM ' . $this->TableDefinitions['langsavail']['name'] . ' WHERE ' . $this->TableDefinitions['langsavail']['lang_id'] . " = '" . $this->LanguageID . "'");
if (DB::isError($result)) {
return $result;
}
return $result[0];
}
/**
* Other languages retrieval
*
* Retrieves names of all other languages, not the active.
*
* @return array 2-dimensional array (0..)('id', 'name') for all the languages defined in DB but the current selected one. In case of DB error - returns PEAR_ERROR object.
*/
function getOtherLangs()
{
$result = $this->db->query('SELECT ' . $this->TableDefinitions['langsavail']['lang_id'] . ", " . $this->TableDefinitions['langsavail']['lang_name'] . ' FROM ' . $this->TableDefinitions['langsavail']['name'] . ' WHERE ' . $this->TableDefinitions['langsavail']['lang_id'] . " <> '" . $this->LanguageID . "'");
if (DB::isError($result)) {
return ($result->getMessage());
}
$i = 0;
while($row = $result->fetchRow()) {
$returnarray[$i]['id'] = $row[0];
$returnarray[$i++]['name'] = $row[1];
}
return $returnarray;
}
/**
* META tags retrieval
*
* Retrievs the META tags that should be added on the top of translated page, so the translated characters will be correctly displayed on client's browser.
*
* @return string with configured in DB META tags for selected language. In case of DB error - returns PEAR_ERROR object.
*/
function getMetaTags()
{
$result = $this->db->getRow('SELECT ' . $this->TableDefinitions['langsavail']['metatags'] . ' FROM ' . $this->TableDefinitions['langsavail']['name'] . ' WHERE ' . $this->TableDefinitions['langsavail']['lang_id'] . " = '" . $this->LanguageID . "'");
if (DB::isError($result)) {
return ($result->getMessage());
}
return $result[0];
}
}
?>
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