/**
* Generates a set of unique tokens according to the given token settings.
* Returns false if the generation is not possible, due to set insert
* probability MAX_INSERT_PROBABILITY.
*
* @return array|bool
*/
public function generateCodes()
{
// Size of one segment of tokens to check against the db.
$tokenCheckStep = ceil($this->configuration->getCount() / 250);
if ($this->isValidGeneration()) {
$finalTokenLength = $this->getFinalTokenLength();
// Check if a max_packet_size Error is possible
$possibleMaxQuerySizeError = $finalTokenLength * $this->configuration->getCount() / 1024 / 1024 > 15;
// Return Query
$resultTokenSet = false;
// Tokens of one Insert Query
$insertTokens = [];
// Tokens of all Insert Queries together
$insertCheckTokens = [];
// Tokens of one segment of tokens to check against if they already exist in the db
$checkTokens = [];
// Count for all tokens to insert into db
$insertCount = 0;
// Count for tokens to check in db in on segment
$checkTokenCount = 0;
// Create unique tokens
while ($insertCount < $this->configuration->getCount()) {
// Considerations for last Couple of tokens, so that the amount of overall tokens is correct.
if ($this->configuration->getCount() > $insertCount + $checkTokenCount) {
$token = $this->formatCode($this->generateCode());
// If the key already exists in the current checkTokens Segment,
// do not increase the checkTokensCount
if (!array_key_exists($token, $checkTokens)) {
$checkTokens[$token] = $token;
$checkTokenCount++;
}
} else {
$checkTokenCount++;
}
// Check the temp array checkTokens if the just generated token already exists.
// If so, unset the last token and decrease the count for the array of tokens to check
if ($this->tokenExists($checkTokens, $insertCheckTokens)) {
$checkTokenCount--;
unset($checkTokens[$token]);
// Check if the length of the checkTokens Array matches the defined step range
// so the the checkTokens get matched against the database.
} elseif ($checkTokenCount == $tokenCheckStep) {
// Check if any of the tokens in the temporary array checkTokens already exists,
// if not so, merge the checkTokens array with the array of tokens to insert and
// increase the overall count by the length of the checkArray i.e. the checkTokenStep
if (!OnlineShop_Framework_VoucherService_Token_List::tokensExist($checkTokens)) {
$insertTokens = array_merge($insertTokens, $checkTokens);
$insertCount += $tokenCheckStep;
}
$checkTokenCount = 0;
$checkTokens = [];
// If an max_package_size error is possible build a new insert query.
if ($possibleMaxQuerySizeError) {
if ($insertCount * $finalTokenLength / 1024 / 1024 > 15) {
$resultTokenSet[] = $insertTokens;
$insertCheckTokens = array_merge($insertTokens, $insertCheckTokens);
$insertTokens = [];
}
} else {
// If no Error is possible or insert query needed, the overall tokens
// are the insert tokens of the current query, because there will be only
// one or no query.
$insertCheckTokens = $insertTokens;
}
}
}
// If there are tokens to insert add them to query.
if (sizeof($insertTokens)) {
$resultTokenSet[] = $insertTokens;
}
return $resultTokenSet;
}
return false;
}
