110 lines
2.6 KiB
PHP
110 lines
2.6 KiB
PHP
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<?php
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/**
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* @link http://www.yiiframework.com/
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* @copyright Copyright (c) 2008 Yii Software LLC
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* @license http://www.yiiframework.com/license/
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*/
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namespace yii\db\pgsql;
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/**
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* The class converts PostgreSQL array representation to PHP array
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*
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* @author Sergei Tigrov <rrr-r@ya.ru>
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* @author Dmytro Naumenko <d.naumenko.a@gmail.com>
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* @since 2.0.14
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*/
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class ArrayParser
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{
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/**
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* @var string Character used in array
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*/
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private $delimiter = ',';
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/**
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* Convert array from PostgreSQL to PHP
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*
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* @param string $value string to be converted
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* @return array|null
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*/
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public function parse($value)
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{
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if ($value === null) {
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return null;
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}
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if ($value === '{}') {
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return [];
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}
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return $this->parseArray($value);
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}
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/**
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* Pares PgSQL array encoded in string
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*
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* @param string $value
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* @param int $i parse starting position
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* @return array
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*/
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private function parseArray($value, &$i = 0)
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{
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$result = [];
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$len = strlen($value);
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for (++$i; $i < $len; ++$i) {
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switch ($value[$i]) {
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case '{':
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$result[] = $this->parseArray($value, $i);
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break;
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case '}':
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break 2;
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case $this->delimiter:
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if (empty($result)) { // `{}` case
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$result[] = null;
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}
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if (in_array($value[$i + 1], [$this->delimiter, '}'], true)) { // `{,}` case
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$result[] = null;
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}
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break;
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default:
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$result[] = $this->parseString($value, $i);
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}
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}
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return $result;
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}
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/**
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* Parses PgSQL encoded string
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*
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* @param string $value
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* @param int $i parse starting position
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* @return null|string
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*/
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private function parseString($value, &$i)
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{
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$isQuoted = $value[$i] === '"';
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$stringEndChars = $isQuoted ? ['"'] : [$this->delimiter, '}'];
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$result = '';
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$len = strlen($value);
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for ($i += $isQuoted ? 1 : 0; $i < $len; ++$i) {
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if (in_array($value[$i], ['\\', '"'], true) && in_array($value[$i + 1], [$value[$i], '"'], true)) {
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++$i;
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} elseif (in_array($value[$i], $stringEndChars, true)) {
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break;
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}
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$result .= $value[$i];
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}
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$i -= $isQuoted ? 0 : 1;
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if (!$isQuoted && $result === 'NULL') {
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$result = null;
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}
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return $result;
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}
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}
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