/**
* Generates a shortened string for a given $target url and stores it inside the database.
*
* The generated string (here $short) follows several rules:
*
* - if strlen($target) > 4 then strlen($target) > strlen($short) else strlen($short) = 4
*
* - $target !== $short
*
* - length of $short is 4
*
* - $short contains only numbers and capitalised consonants.
*
* The function assumes that the $target url exists. Aim of the function is
* to generate a string that is similar to the target url.
* The return value is of type ShortURL which holds
* several information about the generated URL.
*
* @param string $url
* the target
* @return ShortURL
*/
public function generateShortURL($target)
{
$newTarget = preg_replace('/[aeiou,.\\/\\\\-_&=:\\s]+/i', '', $target);
$newTarget = strtoupper($newTarget);
$newTarget = str_shuffle($newTarget);
/*
* If string has more than 4 character pick the first 4 character.
* else if string has less than 4 character fill missing character.
*/
if (strlen($newTarget) > 4) {
$newTarget = substr($newTarget, 0, 4);
} else {
if (strlen($newTarget) < 4) {
$newTarget = $newTarget . $this->generateRandomString(4 - strlen($newTarget));
}
}
if ($this->exists($newTarget)) {
$newTarget = $this->randomizer($newTarget);
}
$short = new ShortURL($this->config['shortener']['targetURL']);
$short->setTarget($target);
$short->setShortName($newTarget);
$short->setDateCreated(time());
$short->setDateExpire($short->getDateCreated() + 4 * 24 * 60 * 60);
$this->dbManager->insertShortURL($short);
return $short;
}
/**
* Inserts a ShortURL into the database.
*
* @param \ShortURL $url
* the ShortURL that needs be stored inside the database.
* @return \\ShortURL which is updated by this method.
*/
public function insertShortURL(\ShortURL $url)
{
$con = $this->getConnection();
if (isset($con)) {
$query = "INSERT INTO shortener (id, shortName, target, dateCreated, dateExpired) \n VALUES (null, :shortName, :target, :dateCreated, :dateExpired)";
$stmt = $con->prepare($query);
$stmt->bindParam(':shortName', $url->getShortName());
$stmt->bindParam(':target', $url->getTarget());
$stmt->bindParam(':dateCreated', $url->getDateCreated());
$stmt->bindParam(':dateExpired', $url->getDateExpire());
$stmt->execute();
$id = $con->lastInsertId();
$url->setId($id);
return $url;
}
}
