229 lines
5.3 KiB
PHP
229 lines
5.3 KiB
PHP
<?php
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/**
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* @author Robin Appelman
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* @copyright 2013 Robin Appelman icewind@owncloud.com
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
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*
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* You should have received a copy of the GNU Affero General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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namespace OC;
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class ArrayParser {
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const TYPE_NUM = 1;
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const TYPE_BOOL = 2;
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const TYPE_STRING = 3;
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const TYPE_ARRAY = 4;
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/**
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* @param string $string
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* @return array|bool|int|null|string
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*/
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function parsePHP($string) {
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$string = $this->stripPHPTags($string);
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$string = $this->stripAssignAndReturn($string);
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return $this->parse($string);
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}
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/**
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* @param string $string
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* @return string
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*/
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function stripPHPTags($string) {
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$string = trim($string);
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if (substr($string, 0, 5) === '<?php') {
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$string = substr($string, 5);
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}
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if (substr($string, -2) === '?>') {
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$string = substr($string, 0, -2);
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}
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return $string;
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}
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/**
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* @param string $string
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* @return string
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*/
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function stripAssignAndReturn($string) {
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$string = trim($string);
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if (substr($string, 0, 6) === 'return') {
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$string = substr($string, 6);
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}
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if (substr($string, 0, 1) === '$') {
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list(, $string) = explode('=', $string, 2);
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}
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return $string;
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}
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/**
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* @param string $string
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* @return array|bool|int|null|string
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*/
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function parse($string) {
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$string = trim($string);
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$string = trim($string, ';');
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switch ($this->getType($string)) {
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case self::TYPE_NUM:
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return $this->parseNum($string);
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case self::TYPE_BOOL:
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return $this->parseBool($string);
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case self::TYPE_STRING:
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return $this->parseString($string);
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case self::TYPE_ARRAY:
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return $this->parseArray($string);
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}
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return null;
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}
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/**
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* @param string $string
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* @return int
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*/
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function getType($string) {
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$string = strtolower($string);
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$first = substr($string, 0, 1);
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$last = substr($string, -1, 1);
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$arrayFirst = substr($string, 0, 5);
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if (($first === '"' or $first === "'") and ($last === '"' or $last === "'")) {
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return self::TYPE_STRING;
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} elseif ($string === 'false' or $string === 'true') {
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return self::TYPE_BOOL;
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} elseif ($arrayFirst === 'array' and $last === ')') {
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return self::TYPE_ARRAY;
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} else {
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return self::TYPE_NUM;
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}
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}
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/**
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* @param string $string
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* @return string
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*/
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function parseString($string) {
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return substr($string, 1, -1);
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}
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/**
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* @param string $string
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* @return int
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*/
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function parseNum($string) {
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return intval($string);
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}
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/**
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* @param string $string
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* @return bool
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*/
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function parseBool($string) {
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$string = strtolower($string);
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return $string === 'true';
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}
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/**
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* @param string $string
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* @return array
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*/
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function parseArray($string) {
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$body = substr($string, 5);
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$body = trim($body);
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$body = substr($body, 1, -1);
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$items = $this->splitArray($body);
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$result = array();
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$lastKey = -1;
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foreach ($items as $item) {
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$item = trim($item);
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if ($item) {
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if (strpos($item, '=>')) {
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list($key, $value) = explode('=>', $item, 2);
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$key = $this->parse($key);
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$value = $this->parse($value);
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} else {
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$key = ++$lastKey;
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$value = $item;
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}
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if (is_numeric($key)) {
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$lastKey = $key;
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}
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$result[$key] = $value;
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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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* @param string $body
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* @return array
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*/
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function splitArray($body) {
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$inSingleQuote = false;//keep track if we are inside quotes
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$inDoubleQuote = false;
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$bracketDepth = 0;//keep track if we are inside brackets
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$parts = array();
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$start = 0;
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$escaped = false;//keep track if we are after an escape character
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$skips = array();//keep track of the escape characters we need to remove from the result
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if (substr($body, -1, 1) !== ',') {
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$body .= ',';
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}
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$bodyLength = strlen($body);
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for ($i = 0; $i < $bodyLength; $i++) {
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$char = substr($body, $i, 1);
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if ($char === '\\') {
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if ($escaped) {
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array_unshift($skips, $i - 1);
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}
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$escaped = !$escaped;
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} else {
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if ($char === '"' and !$inSingleQuote) {
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if ($escaped) {
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array_unshift($skips, $i - 1);
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} else {
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$inDoubleQuote = !$inDoubleQuote;
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}
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} elseif ($char === "'" and !$inDoubleQuote) {
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if ($escaped) {
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array_unshift($skips, $i - 1);
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} else {
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$inSingleQuote = !$inSingleQuote;
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}
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} elseif (!$inDoubleQuote and !$inSingleQuote) {
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if ($char === '(') {
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$bracketDepth++;
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} elseif ($char === ')') {
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if ($bracketDepth <= 0) {
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throw new UnexpectedValueException();
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} else {
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$bracketDepth--;
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}
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} elseif ($bracketDepth === 0 and $char === ',') {
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$part = substr($body, $start, $i - $start);
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foreach ($skips as $skip) {
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$part = substr($part, 0, $skip - $start) . substr($part, $skip - $start + 1);
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}
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$parts[] = $part;
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$start = $i + 1;
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$skips = array();
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}
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}
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$escaped = false;
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}
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}
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return $parts;
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}
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}
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