128 lines
3.2 KiB
PHP
128 lines
3.2 KiB
PHP
<?php
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namespace App\Http\Controllers\Api\V1;
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use App\Http\Controllers\Controller;
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class IndexController extends Controller
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{
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public function index()
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{
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$cd = intval($_GET["cd"]);
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$text = str($_GET["text"]);
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$shift = intval($_GET["shift"]);
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$language = str($_GET["language"]);
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$shift = $this->normalizeShift($shift, $language);
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$result_text = '';
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if ($language == 'Ru'){
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if ($cd == 0){
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$result_text = $this->ruEncipher($text, $shift);
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} elseif ($cd == 1){
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$result_text = $this->ruDecipher($text, $shift);
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}
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} elseif ($language == 'En') {
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if ($cd == 0){
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$result_text = $this->enEncipher($text, $shift);
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} elseif ($cd == 1){
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$result_text = $this->enDecipher($text, $shift);
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}
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}
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return $result_text;
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}
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public function normalizeShift($shift, $alphabet)
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{
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if ($alphabet == 'Ru'){
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if ($shift > 32){
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while ($shift > 32)
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{
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$shift = $shift - 32;
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}
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}
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return $shift;
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} elseif ($alphabet == 'En') {
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if ($shift > 26){
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while ($shift > 26)
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{
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$shift = $shift - 26;
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}
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}
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return $shift;
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}
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}
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public function enCipher($ch, $key)
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{
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if (!ctype_alpha($ch))
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return $ch;
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$offset = ord(ctype_upper($ch) ? 'A' : 'a');
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return chr(fmod(((ord($ch) + $key) - $offset), 26) + $offset);
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}
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public function enEncipher($input, $key)
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{
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$output = "";
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$inputArr = str_split($input);
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foreach ($inputArr as $ch)
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$output .= $this->enCipher($ch, $key);
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return $output;
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}
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public function enDecipher($input, $key)
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{
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return $this->enEncipher($input, 26 - $key);
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}
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public function ruCipher($ch, $key)
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{
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$regexp = "/[А-ЯЁа-яё]/";
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$regexp_upper = "/[А-ЯЁ]\{Lu}/";
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if (!preg_match($regexp, $ch))
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{
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return $ch;
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}
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$offset = mb_ord(preg_match($regexp_upper, $ch) ? 'А' : 'а', "UTF-8");
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return mb_chr(fmod(((mb_ord($ch, "UTF-8") + $key) - $offset), 32) + $offset, "UTF-8");
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}
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function ruCipherReverse($ch, $key)
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{
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$regexp = "/[А-ЯЁа-яё]/";
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$regexp_upper = "/[А-ЯЁ]\{Lu}/";
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if (!preg_match($regexp, $ch))
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{
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return $ch;
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}
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$offset = mb_ord(preg_match($regexp_upper, $ch) ? 'А' : 'а', "UTF-8");
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return mb_chr(fmod(((mb_ord($ch, "UTF-8") - $key) - $offset), 32) + $offset, "UTF-8");
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}
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public function ruEncipher($input, $key)
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{
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$output = "";
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$inputArr = mb_str_split($input, 1, "UTF-8");
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foreach ($inputArr as $ch)
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$output .= $this->ruCipher($ch, $key);
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return $output;
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}
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public function ruDecipher($input, $key)
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{
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$output = "";
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$inputArr = mb_str_split($input, 1, "UTF-8");
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foreach ($inputArr as $ch)
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$output .= $this->ruCipherReverse($ch, $key);
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return $output;
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}
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}
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