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| 1 | <?php |
| 2 | namespace Apie\Core\Randomizer; |
| 3 | |
| 4 | class SecureRandomizer implements RandomizerInterface |
| 5 | { |
| 6 | public function randomElements(array $elements, int $count): array |
| 7 | { |
| 8 | $res = []; |
| 9 | for ($i = 0; $i < $count; $i++) { |
| 10 | $res[] = $this->randomElement($elements); |
| 11 | } |
| 12 | return $res; |
| 13 | } |
| 14 | public function randomElement(array $elements): mixed |
| 15 | { |
| 16 | return $elements[random_int(0, count($elements) - 1)]; |
| 17 | } |
| 18 | public function randomDigit(): int |
| 19 | { |
| 20 | return random_int(0, 9); |
| 21 | } |
| 22 | public function numberBetween(int $minLength, int $maxLength): int |
| 23 | { |
| 24 | return random_int($minLength, $maxLength); |
| 25 | } |
| 26 | |
| 27 | public function shuffle(array& $list): void |
| 28 | { |
| 29 | $count = count($list); |
| 30 | // n log n is sufficient number of shuffles between 2 items |
| 31 | $numberOfShuffles = ($count * log10($count)); |
| 32 | for ($i = 0; $i < $numberOfShuffles; $i++) { |
| 33 | $left = random_int(0, $count - 1); |
| 34 | $right = random_int(0, $count - 1); |
| 35 | $tmp = $list[$left]; |
| 36 | $list[$left] = $list[$right]; |
| 37 | $list[$right] = $tmp; |
| 38 | } |
| 39 | } |
| 40 | } |