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<?php |
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namespace ierusalim\Random; |
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/** |
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* This class RandomJson is intended for generating random json-files |
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* |
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* PHP Version 5.6 |
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* |
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* @package ierusalim\RandomJson |
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* @author Alexander Jer <[email protected]> |
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* @copyright 2017, Ierusalim |
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* @license https://opensource.org/licenses/Apache-2.0 Apache-2.0 |
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* |
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* Example of use: |
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* $g = new RandomJson(); |
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* $g->setKeysModel(); |
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* $g->setValuesModel(); |
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* $file_name = $g->genRandomJson(10, 10, 32768, 3, 100, 65535); |
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* $json_raw = file_get_contents($file_name); |
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* $arr = json_decode($json_raw,true); |
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* print_r($arr); |
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* |
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* //Example for ASCII chars and UTF-8 multibyte values: |
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* $g->setKeysModel(5,8,implode(range('a','z'))); |
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* $g->setValuesModel(1,10, "神會貓性少女 迪克和陰部", true); |
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* $file_name = $g->genRandomJson(10, 10, 32768, 3, 100, 0); |
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* $json_raw = file_get_contents($file_name); |
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* $arr = json_decode($json_raw,true); |
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* print_r($arr); |
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*/ |
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class RandomJson extends RandomToFile |
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{ |
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public $threshold_obj = 32768; |
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public function __construct($file_name = null) |
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{ |
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parent::__construct([$this, 'writeFileRandomJson']); |
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$file_name = $this->setOutputFile($file_name); |
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} |
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public function genRandomJson( |
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$min_elem_cnt = 3, |
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$max_elem_cnt = 10, |
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$threshold_nesting = 32768, |
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$lim_depth = 3, |
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$lim_elements = 100000, |
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$threshold_obj = null |
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) { |
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if (!\is_null($threshold_obj)) { |
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$this->threshold_obj = $threshold_obj; |
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} |
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if (!$this->genRandomToFile( |
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$min_elem_cnt, |
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$max_elem_cnt, |
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$threshold_nesting, |
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$lim_depth, |
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$lim_elements |
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) |
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) { |
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return false; |
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} |
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return $this->full_file_name; |
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} |
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public function makeNextValueStr($k, $v, $is_obj, &$need_div) { |
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if ($is_obj) { |
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$out_str = json_encode([$k => $v]); |
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$out_str = substr($out_str, 1, -1); |
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} else { |
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$out_str = json_encode($v); |
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} |
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if ($need_div) { |
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$out_str = ',' . $out_str; |
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} else { |
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$need_div = true; |
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} |
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return $out_str; |
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} |
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public function writeFileRandomJson($parr) |
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{ |
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static $keys = []; |
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static $key_is_obj = []; |
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static $need_div = 0; |
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//extracting following work variables: |
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\extract($parr); //$signal, $k, $v, $lim_depth, $root |
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switch ($signal) { |
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//siglan 'next' - output next scalar element of array [$k]=>$v |
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case 'next': |
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$is_obj = $key_is_obj[count($keys)]; |
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$out_str = $this->makeNextValueStr($k, $v, $is_obj, $need_div); |
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break; |
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//signal 'open' - root or nested array beginning |
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case 'open': |
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//Generate [] array or {} ? |
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$is_obj = (\mt_rand(0, 65535) >= $this->threshold_obj); |
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$c = \count($keys); |
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if ($c || !empty($root)) { |
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//nested array beginned |
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$prev_is_obj = isset($key_is_obj[$c]) ? $key_is_obj[$c] : 0; |
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$root = substr(json_encode([$root => '']), 1, -4); |
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array_push($keys, $root); |
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} |
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$key_is_obj[count($keys)] = $is_obj; |
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$out_str = ($need_div) ? ',' : ''; |
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if (!empty($prev_is_obj)) { |
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$out_str .= $root . ":"; |
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} |
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$out_str .= ($is_obj ? '{' : '['); |
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$need_div = false; |
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break; |
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//signal 'close' - root or nested array ended |
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case 'close': |
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$is_obj = $key_is_obj[count($keys)]; |
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if (count($keys)) { |
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//nested array ended |
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\array_pop($keys); |
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} |
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$out_str = ($is_obj ? '}' : ']'); |
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break; |
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//signal 'init' - when file open for write |
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case 'init': |
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$keys = []; |
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$key_is_obj = []; |
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$need_div = 0; |
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$out_str = ''; |
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} |
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//write formed string to output file |
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\fwrite($fh, $out_str); |
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} |
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} |
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ierusalim /
php-random-gen
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