/**
* Main shurl creation. shurl is first created by encoding the next
* id in the shurl table, using an 18 characters subset of the alphabet
* plus a few digits. These have been selected to avoid risks of
* characters confusion.
*
* There is no check a
*
*/
private function _buildPageId()
{
$shURL = '';
$nextId = $this->_getNextDBId('#__sh404sef_pageids');
if ($nextId !== false) {
$nextId = base_convert(18 + $nextId, 10, 18);
for ($c = 0; $c < strlen($nextId); ++$c) {
$char = base_convert($nextId[$c], 18, 10);
$shURL .= self::$_regular[$char];
}
}
// now check if this shurl is not an existing
// SEF or alias. If so, use the alternate char set
// to create a new shurl, and try again.
// using alternate char set (instead of simply increasing nextId)
// makes sure that next time we try to create a shurl (for next URL)
// we won't try something we've already used, making the number of attempts
// for each shurl creation grows each time there is a collision
try {
$attempts = 0;
$maxAttempts = 8;
// don't need to check for collisions with existing shurls
// as we use the next insert id, and code that using a unique char set
//however, if we need to modify the shurl because it collides with
// an existing SEF url or an alias, we will do so using the alternate
// character set, so the new shurl don't risk collision with a regular
// shurl but it may then collide with another, previously modified shurl
// and so we need to check for shurl collisions when this happens
$doneShurl = true;
// however, need to check for collisions with regular sef urls and aliases
$doneSef = false;
$doneAlias = false;
// and for bad language
$doneClean = false;
// prepare user set bad language/exclusion list
$sefConfig =& shRouter::shGetConfig();
$sefConfig->shurlBlackList = JString::trim($sefConfig->shurlBlackList);
if (empty($sefConfig->shurlBlackList)) {
$blackList = array();
} else {
if (strpos($sefConfig->shurlBlackList, '|') !== false) {
$blackList = explode('|', $sefConfig->shurlBlackList);
} else {
$blackList = array($sefConfig->shurlBlackList);
}
}
$doneBlackList = false;
do {
// clean word check: this is an internal bad words list
if (!$doneClean) {
if (in_array($shURL, self::$_badWords)) {
// bad language
$attempts++;
// build a new shurl, by changing a character
// with one from the alternate set
$shURL = $this->_getModifiedShurl($shURL);
// invalidate shurl and alias check flag, to check again with this new shurl
$doneShurl = false;
$doneAlias = false;
$doneSef = false;
$doneBlackList = false;
} else {
$doneClean = true;
}
}
// user word black list
if (!$doneBlackList) {
if (in_array($shURL, $blackList)) {
// bad language
$attempts++;
// build a new shurl, by changing a character
// with one from the alternate set
$shURL = $this->_getModifiedShurl($shURL);
// invalidate shurl and alias check flag, to check again with this new shurl
$doneShurl = false;
$doneAlias = false;
$doneSef = false;
$doneClean = false;
} else {
$doneBlackList = true;
}
}
// regular SEF url collision check
if (!$doneSef) {
$isSEF = (int) Sh404sefHelperDb::count('#__redirection', '*', $this->_db->nameQuote('oldurl') . ' = ? and ' . $this->_db->nameQuote('newurl') . ' <> ?', array($shURL, ''));
if (!empty($isSEF)) {
// there is already a SEF url like that
$attempts++;
// build a new shurl, by changing a character
// with one from the alternate set
$shURL = $this->_getModifiedShurl($shURL);
// invalidate shurl and alias check flag, to check again with this new shurl
$doneShurl = false;
$doneAlias = false;
$doneClean = false;
$doneBlackList = false;
} else {
$doneSef = true;
}
}
// previous shurl check
if (!$doneShurl) {
$isShurl = (int) Sh404sefHelperDb::count('#__sh404sef_pageids', '*', array('pageid' => $shURL, 'type' => Sh404sefHelperGeneral::COM_SH404SEF_URLTYPE_PAGEID));
if (!empty($isShurl)) {
// there is already a shurl like that
$attempts++;
// build a new shurl, by changing a character
// with one from the alternate set
$shURL = $this->_getModifiedShurl($shURL);
// invalidate regular sef and alias check flag, to check again with this new shurl
$doneSef = false;
$doneAlias = false;
$doneClean = false;
$doneBlackList = false;
} else {
$doneShurl = true;
}
}
// alias collision check
if (!$doneAlias) {
$isAlias = (int) Sh404sefHelperDb::count('#__sh404sef_aliases', '*', array('alias' => $shURL, 'type' => Sh404sefHelperGeneral::COM_SH404SEF_URLTYPE_ALIAS));
if (!empty($isAlias)) {
// there is already an alias like that
$attempts++;
// build a new shurl, by changing a character
// with one from the alternate set
$shURL = $this->_getModifiedShurl($shURL);
// invalidate regular sef and shurl check flag, to check again with this new shurl
$doneSef = false;
$doneShurl = false;
$doneClean = false;
$doneBlackList = false;
} else {
$doneAlias = true;
}
}
} while ((!$doneSef || !$doneAlias || !$doneShurl || !$doneClean || !$doneBlackList) && $attempts < $maxAttempts);
} catch (Sh404sefExceptionDefault $e) {
}
return $shURL;
}
public function getAliasesCount($which = 'auto')
{
switch (strtolower($which)) {
// we want to read all automatic urls (include duplicates)
case 'auto':
try {
$numberOfUrls = Sh404sefHelperDb::count($this->_getTableName(), '*', array('type' => Sh404sefHelperGeneral::COM_SH404SEF_URLTYPE_ALIAS));
} catch (Sh404sefExceptionDefault $e) {
$numberofUrls = 0;
}
break;
// we want to read urls as per current selection input fields
// ie : component, language, custom, ...
// we want to read urls as per current selection input fields
// ie : component, language, custom, ...
case 'selected':
$numberOfUrls = $this->getTotal();
break;
default:
$numberOfUrls = 0;
break;
}
return intval($numberOfUrls);
}