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1 | <?php |
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2 | /** |
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3 | * Yandex PHP Library |
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4 | * |
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5 | * @copyright NIX Solutions Ltd. |
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6 | * @link https://github.com/nixsolutions/yandex-php-library |
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7 | */ |
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8 | |||
9 | /** |
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10 | * @namespace |
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11 | */ |
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12 | namespace Yandex\SafeBrowsing\Adapter; |
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13 | |||
14 | use Predis\Client; |
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15 | |||
16 | /** |
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17 | * Class RedisAdapter |
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18 | * |
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19 | * @category Yandex |
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20 | * @package SafeBrowsing |
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21 | */ |
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22 | class RedisAdapter |
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23 | { |
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24 | const KEY_SHA_VARS = 'sha_vars'; |
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25 | const KEY_SHA_VAR = 'sha_var'; |
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26 | |||
27 | const KEY_HASH_PREFIXES = 'hash_prefixes'; |
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28 | const KEY_HASH_PREFIX = 'hash_prefix'; |
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29 | |||
30 | const KEY_CHUNK_NUMS = 'chunk_nums'; |
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31 | const KEY_CHUNK_NUM = 'chunk_num'; |
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32 | |||
33 | /** |
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34 | * @var Client |
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35 | */ |
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36 | private $client; |
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37 | |||
38 | public function __construct($dsn = '', $options = []) |
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39 | { |
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40 | $this->client = $this->initClient($dsn, $options); |
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41 | } |
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42 | |||
43 | /** |
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44 | * @param string $dsn |
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45 | * @param array $options |
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46 | * @param bool $reset |
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47 | * @return Client |
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48 | */ |
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49 | public function initClient($dsn = '', $options = [], $reset = false) |
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50 | { |
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51 | if (!$this->client || $reset) { |
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52 | $this->client = new Client($dsn, $options); |
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53 | $this->client->ping(); |
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54 | } |
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55 | |||
56 | return $this->client; |
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57 | } |
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58 | |||
59 | /** |
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60 | * @param string $shaVar |
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61 | */ |
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62 | public function addShaVar($shaVar) |
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63 | { |
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64 | $this->client->sadd(self::KEY_SHA_VARS, [$shaVar]); |
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65 | } |
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66 | |||
67 | /** |
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68 | * @param string $shaVar |
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69 | * @param string $chunkNum |
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70 | */ |
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71 | public function addChunkNum($shaVar, $chunkNum) |
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72 | { |
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73 | $this->client->sadd(sprintf('%s:%s:%s', self::KEY_SHA_VAR, $shaVar, self::KEY_CHUNK_NUMS), [$chunkNum]); |
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74 | } |
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75 | |||
76 | /** |
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77 | * @param string $shaVar |
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78 | * @param string $chunkNum |
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79 | * @param string $hashPrefix |
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80 | */ |
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81 | public function addHashPrefix($shaVar, $chunkNum, $hashPrefix) |
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82 | { |
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83 | $this->client->sadd(sprintf('%s:%s:%s', self::KEY_SHA_VAR, $shaVar, $chunkNum), [$hashPrefix]); |
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84 | $this->client->set(sprintf('%s:%s', self::KEY_HASH_PREFIX, $hashPrefix), json_encode([ |
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85 | 'sha_var' => $shaVar, |
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86 | 'chunk_num' => $chunkNum, |
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87 | ])); |
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88 | } |
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89 | |||
90 | /** |
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91 | * @param string $shaVar |
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92 | * @param string $chunkNum |
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93 | * @param string $hashPrefix |
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94 | */ |
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95 | public function saveHashPrefix($shaVar, $chunkNum, $hashPrefix) |
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96 | { |
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97 | $this->addShaVar($shaVar); |
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98 | $this->addChunkNum($shaVar, $chunkNum); |
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99 | $this->addHashPrefix($shaVar, $chunkNum, $hashPrefix); |
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100 | } |
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101 | |||
102 | public function getShaVars() |
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103 | { |
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104 | return $this->client->smembers(self::KEY_SHA_VARS); |
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105 | } |
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106 | |||
107 | /** |
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108 | * @param string $shaVar |
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109 | * @return array |
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110 | */ |
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111 | public function getChunkNums($shaVar) |
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112 | { |
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113 | return $this->client->smembers(sprintf('%s:%s:%s', self::KEY_SHA_VAR, $shaVar, self::KEY_CHUNK_NUMS)); |
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114 | } |
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115 | |||
116 | /** |
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117 | * @param string $shaVar |
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118 | * @param string $chunkNum |
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119 | * @return array |
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120 | */ |
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121 | public function getHashPrefixes($shaVar, $chunkNum) |
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122 | { |
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123 | return $this->client->smembers(sprintf('%s:%s:%s', self::KEY_SHA_VAR, $shaVar, $chunkNum)); |
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124 | } |
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125 | |||
126 | /** |
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127 | * @param string $hashPrefix |
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128 | * @return string|null |
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129 | */ |
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130 | public function getHashPrefix($hashPrefix) |
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131 | { |
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132 | return $this->client->get(sprintf('%s:%s', self::KEY_HASH_PREFIX, $hashPrefix)); |
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133 | } |
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134 | |||
135 | /** |
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136 | * @param string $shaVar |
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137 | * @param string $chunkNum |
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138 | */ |
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139 | public function removeChunkNum($shaVar, $chunkNum) |
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140 | { |
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141 | $this->client->srem(sprintf('%s:%s:%s', self::KEY_SHA_VAR, $shaVar, self::KEY_CHUNK_NUMS), $chunkNum); |
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142 | $this->client->del(sprintf('%s:%s:%s', self::KEY_SHA_VAR, $shaVar, $chunkNum)); |
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143 | //todo: Remove sha_var if its last chunk_num removed |
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144 | } |
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145 | |||
146 | /** |
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147 | * @param string $shaVar |
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148 | * @param string $chunkNum |
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149 | * @param string $hashPrefix |
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150 | */ |
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151 | public function removeHashPrefix($shaVar, $chunkNum, $hashPrefix) |
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152 | { |
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153 | $this->client->srem(sprintf('%s:%s:%s', self::KEY_SHA_VAR, $shaVar, $chunkNum), $hashPrefix); |
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154 | $this->client->del(sprintf('%s:%s', self::KEY_HASH_PREFIX, $hashPrefix)); |
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155 | //todo: Remove chunk_num if its last hashPrefix removed |
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156 | } |
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157 | |||
158 | /** |
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159 | * @param array $hashes |
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160 | * @return bool |
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161 | */ |
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162 | public function hasHashes($hashes) |
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163 | { |
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164 | if (!is_array($hashes)) { |
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165 | return false; |
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166 | } |
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167 | |||
168 | foreach ($hashes as $hash) { |
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169 | if (!empty($hash['prefix']) && $this->getHashPrefix($hash['prefix'])) { |
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170 | return true; |
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171 | } |
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172 | } |
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173 | |||
174 | return false; |
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175 | } |
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176 | } |
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177 |
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: