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<?php |
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/** |
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* Yandex PHP Library |
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* |
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* @copyright NIX Solutions Ltd. |
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* @link https://github.com/nixsolutions/yandex-php-library |
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*/ |
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/** |
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* @namespace |
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*/ |
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namespace Yandex\SafeBrowsing\Adapter; |
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use Predis\Client; |
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/** |
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* Class RedisAdapter |
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* |
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* @category Yandex |
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* @package SafeBrowsing |
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*/ |
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class RedisAdapter |
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{ |
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const KEY_SHA_VARS = 'sha_vars'; |
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const KEY_SHA_VAR = 'sha_var'; |
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const KEY_HASH_PREFIXES = 'hash_prefixes'; |
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const KEY_HASH_PREFIX = 'hash_prefix'; |
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const KEY_CHUNK_NUMS = 'chunk_nums'; |
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const KEY_CHUNK_NUM = 'chunk_num'; |
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/** |
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* @var Client |
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*/ |
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private $client; |
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public function __construct($dsn = '', $options = []) |
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{ |
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$this->client = $this->initClient($dsn, $options); |
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} |
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/** |
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* @param string $dsn |
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* @param array $options |
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* @param bool $reset |
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* @return Client |
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*/ |
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public function initClient($dsn = '', $options = [], $reset = false) |
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{ |
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if (!$this->client || $reset) { |
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$this->client = new Client($dsn, $options); |
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$this->client->ping(); |
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} |
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return $this->client; |
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} |
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/** |
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* @param string $shaVar |
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*/ |
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public function addShaVar($shaVar) |
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{ |
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$this->client->sadd(self::KEY_SHA_VARS, [$shaVar]); |
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} |
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/** |
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* @param string $shaVar |
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* @param string $chunkNum |
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*/ |
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public function addChunkNum($shaVar, $chunkNum) |
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{ |
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$this->client->sadd(sprintf('%s:%s:%s', self::KEY_SHA_VAR, $shaVar, self::KEY_CHUNK_NUMS), [$chunkNum]); |
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} |
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/** |
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* @param string $shaVar |
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* @param string $chunkNum |
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* @param string $hashPrefix |
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*/ |
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public function addHashPrefix($shaVar, $chunkNum, $hashPrefix) |
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{ |
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$this->client->sadd(sprintf('%s:%s:%s', self::KEY_SHA_VAR, $shaVar, $chunkNum), [$hashPrefix]); |
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$this->client->set(sprintf('%s:%s', self::KEY_HASH_PREFIX, $hashPrefix), json_encode([ |
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'sha_var' => $shaVar, |
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'chunk_num' => $chunkNum, |
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])); |
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} |
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/** |
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* @param string $shaVar |
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* @param string $chunkNum |
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* @param string $hashPrefix |
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*/ |
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public function saveHashPrefix($shaVar, $chunkNum, $hashPrefix) |
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{ |
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$this->addShaVar($shaVar); |
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$this->addChunkNum($shaVar, $chunkNum); |
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$this->addHashPrefix($shaVar, $chunkNum, $hashPrefix); |
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} |
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public function getShaVars() |
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{ |
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return $this->client->smembers(self::KEY_SHA_VARS); |
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} |
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/** |
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* @param string $shaVar |
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* @return array |
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*/ |
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public function getChunkNums($shaVar) |
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{ |
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return $this->client->smembers(sprintf('%s:%s:%s', self::KEY_SHA_VAR, $shaVar, self::KEY_CHUNK_NUMS)); |
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} |
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/** |
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* @param string $shaVar |
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* @param string $chunkNum |
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* @return array |
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*/ |
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public function getHashPrefixes($shaVar, $chunkNum) |
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{ |
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return $this->client->smembers(sprintf('%s:%s:%s', self::KEY_SHA_VAR, $shaVar, $chunkNum)); |
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} |
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/** |
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* @param string $hashPrefix |
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* @return string|null |
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*/ |
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public function getHashPrefix($hashPrefix) |
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{ |
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return $this->client->get(sprintf('%s:%s', self::KEY_HASH_PREFIX, $hashPrefix)); |
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} |
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/** |
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* @param string $shaVar |
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* @param string $chunkNum |
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*/ |
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public function removeChunkNum($shaVar, $chunkNum) |
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{ |
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$this->client->srem(sprintf('%s:%s:%s', self::KEY_SHA_VAR, $shaVar, self::KEY_CHUNK_NUMS), $chunkNum); |
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$this->client->del(sprintf('%s:%s:%s', self::KEY_SHA_VAR, $shaVar, $chunkNum)); |
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//todo: Remove sha_var if its last chunk_num removed |
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} |
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/** |
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* @param string $shaVar |
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* @param string $chunkNum |
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* @param string $hashPrefix |
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*/ |
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public function removeHashPrefix($shaVar, $chunkNum, $hashPrefix) |
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{ |
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$this->client->srem(sprintf('%s:%s:%s', self::KEY_SHA_VAR, $shaVar, $chunkNum), $hashPrefix); |
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$this->client->del(sprintf('%s:%s', self::KEY_HASH_PREFIX, $hashPrefix)); |
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//todo: Remove chunk_num if its last hashPrefix removed |
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} |
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/** |
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* @param array $hashes |
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* @return bool |
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*/ |
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public function hasHashes($hashes) |
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{ |
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if (!is_array($hashes)) { |
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return false; |
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} |
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foreach ($hashes as $hash) { |
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if (!empty($hash['prefix']) && $this->getHashPrefix($hash['prefix'])) { |
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return true; |
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} |
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} |
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return false; |
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} |
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} |
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In PHP, under loose comparison (like
==
, or!=
, orswitch
conditions), values of different types might be equal.For
string
values, the empty string''
is a special case, in particular the following results might be unexpected: