public function testGenerate()
{
$finger = Fingerprint::generate();
$this->assertNotNull($finger);
// Make sure it generates the same value
$this->assertSame($finger, Fingerprint::generate());
}
function getRequestParameters()
{
$params = $this->getRawParameters();
$fingerprintOrder = array_merge(['customerId', 'shopId', 'password', 'secret', 'language'], $this->fingerprintOrder);
$requiredParameters = array_merge(['customerId', 'requestFingerprint', 'password', 'language'], $this->requiredParameters);
switch ($this->getParam('fundTransferType')) {
case FundTransferType::EXISTINGORDER:
$fingerprintOrder[] = 'sourceOrderNumber';
$requiredParameters[] = 'sourceOrderNumber';
break;
case FundTransferType::MONETA:
$fingerprintOrder[] = 'consumerWalletId';
$requiredParameters[] = 'consumerWalletId';
break;
case FundTransferType::SEPA_CT:
$fingerprintOrder[] = 'bankAccountOwner';
$fingerprintOrder[] = 'bankBic';
$fingerprintOrder[] = 'bankAccountIban';
$requiredParameters[] = 'bankAccountOwner';
$requiredParameters[] = 'bankBic';
$requiredParameters[] = 'bankAccountIban';
break;
case FundTransferType::SKRILLWALLET:
$fingerprintOrder[] = 'consumerEmail';
$requiredParameters[] = 'consumerEmail';
$requiredParameters[] = 'customerStatement';
break;
}
$params['requestFingerprint'] = Fingerprint::fromParameters($params)->setContext($this->getContext())->setFingerprintOrder($fingerprintOrder);
$this->assertParametersAreValid($params, $requiredParameters);
return $params;
}
/**
* This method applies the Winnowing Algorithmn described at the article
* `Winnowing: Local Algorithms for Document Fingerprinting` by Saul Schleimer,
* Daniel S. Wilkerson, and Alex Aiken. It consists in extracting the smallest hash
* in a window of characters taken directly from the text. This way it's possible to
* identify similarities across documents since you can have different individual hashs
* in a very similar sequence of hashs. For more information read the article.
*
* @public
* @param $documentContent the document text
* @return {array} an array of Fingerprints
*/
public function extractFingerprint($documentContent)
{
$fingerprints = array();
$contentLength = strlen($documentContent);
$hashCount = $contentLength - $this->k;
$windowSize = $this->threshold - $this->k + 1;
for ($i = 0; $i < $hashCount; $i++) {
$window = array();
for ($j = $i; $j < $i + $windowSize; $j++) {
$value = substr($documentContent, $j, $this->k);
$window[$j] = hash('md5', $value, false);
}
reset($window);
$min = key($window);
$fingerprint = $window[$min];
foreach ($window as $index => $hash) {
if ($hash <= $fingerprint) {
$min = $index;
$fingerprint = $hash;
}
}
$fingerprints[$min] = $fingerprint;
}
$ret = array();
$normalizedLocation = 0;
foreach ($fingerprints as $loc => $hash) {
array_push($ret, Fingerprint::fill($hash, $loc, $normalizedLocation++));
}
return $ret;
}
public function isEquals(Fingerprint $fingerprint)
{
return $this->getHash() === $fingerprint->getHash();
}