Viewing file:  JsonManipulator.php (20.44 KB) -rw-r--r--
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<?php
/*
* This file is part of Composer.
*
* (c) Nils Adermann <naderman@naderman.de>
* Jordi Boggiano <j.boggiano@seld.be>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Composer\Json;
use Composer\Repository\PlatformRepository;
/**
* @author Jordi Boggiano <j.boggiano@seld.be>
*/
class JsonManipulator
{
private static $DEFINES = '(?(DEFINE)
(?<number> -? (?= [1-9]|0(?!\d) ) \d++ (\.\d++)? ([eE] [+-]?+ \d++)? )
(?<boolean> true | false | null )
(?<string> " ([^"\\\\]*+ | \\\\ ["\\\\bfnrt\/] | \\\\ u [0-9A-Fa-f]{4} )* " )
(?<array> \[ (?: (?&json) \s*+ (?: , (?&json) \s*+ )*+ )?+ \s*+ \] )
(?<pair> \s*+ (?&string) \s*+ : (?&json) \s*+ )
(?<object> \{ (?: (?&pair) (?: , (?&pair) )*+ )?+ \s*+ \} )
(?<json> \s*+ (?: (?&number) | (?&boolean) | (?&string) | (?&array) | (?&object) ) )
)';
private $contents;
private $newline;
private $indent;
public function __construct($contents)
{
$contents = trim($contents);
if ($contents === '') {
$contents = '{}';
}
if (!$this->pregMatch('#^\{(.*)\}$#s', $contents)) {
throw new \InvalidArgumentException('The json file must be an object ({})');
}
$this->newline = false !== strpos($contents, "\r\n") ? "\r\n" : "\n";
$this->contents = $contents === '{}' ? '{' . $this->newline . '}' : $contents;
$this->detectIndenting();
}
public function getContents()
{
return $this->contents . $this->newline;
}
public function addLink($type, $package, $constraint, $sortPackages = false)
{
$decoded = JsonFile::parseJson($this->contents);
// no link of that type yet
if (!isset($decoded[$type])) {
return $this->addMainKey($type, array($package => $constraint));
}
$regex = '{'.self::$DEFINES.'^(?P<start>\s*\{\s*(?:(?&string)\s*:\s*(?&json)\s*,\s*)*?)'.
'(?P<property>'.preg_quote(JsonFile::encode($type)).'\s*:\s*)(?P<value>(?&json))(?P<end>.*)}sx';
if (!$this->pregMatch($regex, $this->contents, $matches)) {
return false;
}
$links = $matches['value'];
// try to find existing link
$packageRegex = str_replace('/', '\\\\?/', preg_quote($package));
$regex = '{'.self::$DEFINES.'"(?P<package>'.$packageRegex.')"(\s*:\s*)(?&string)}ix';
if ($this->pregMatch($regex, $links, $packageMatches)) {
// update existing link
$existingPackage = $packageMatches['package'];
$packageRegex = str_replace('/', '\\\\?/', preg_quote($existingPackage));
$links = preg_replace_callback('{'.self::$DEFINES.'"'.$packageRegex.'"(?P<separator>\s*:\s*)(?&string)}ix', function ($m) use ($existingPackage, $constraint) {
return JsonFile::encode(str_replace('\\/', '/', $existingPackage)) . $m['separator'] . '"' . $constraint . '"';
}, $links);
} else {
if ($this->pregMatch('#^\s*\{\s*\S+.*?(\s*\}\s*)$#s', $links, $match)) {
// link missing but non empty links
$links = preg_replace(
'{'.preg_quote($match[1]).'$}',
// addcslashes is used to double up backslashes/$ since preg_replace resolves them as back references otherwise, see #1588
addcslashes(',' . $this->newline . $this->indent . $this->indent . JsonFile::encode($package).': '.JsonFile::encode($constraint) . $match[1], '\\$'),
$links
);
} else {
// links empty
$links = '{' . $this->newline .
$this->indent . $this->indent . JsonFile::encode($package).': '.JsonFile::encode($constraint) . $this->newline .
$this->indent . '}';
}
}
if (true === $sortPackages) {
$requirements = json_decode($links, true);
$this->sortPackages($requirements);
$links = $this->format($requirements);
}
$this->contents = $matches['start'] . $matches['property'] . $links . $matches['end'];
return true;
}
/**
* Sorts packages by importance (platform packages first, then PHP dependencies) and alphabetically.
*
* @link https://getcomposer.org/doc/02-libraries.md#platform-packages
*
* @param array $packages
*/
private function sortPackages(array &$packages = array())
{
$prefix = function ($requirement) {
if (PlatformRepository::isPlatformPackage($requirement)) {
return preg_replace(
array(
'/^php/',
'/^hhvm/',
'/^ext/',
'/^lib/',
'/^\D/',
),
array(
'0-$0',
'1-$0',
'2-$0',
'3-$0',
'4-$0',
),
$requirement
);
}
return '5-'.$requirement;
};
uksort($packages, function ($a, $b) use ($prefix) {
return strnatcmp($prefix($a), $prefix($b));
});
}
public function addRepository($name, $config, $append = true)
{
return $this->addSubNode('repositories', $name, $config, $append);
}
public function removeRepository($name)
{
return $this->removeSubNode('repositories', $name);
}
public function addConfigSetting($name, $value)
{
return $this->addSubNode('config', $name, $value);
}
public function removeConfigSetting($name)
{
return $this->removeSubNode('config', $name);
}
public function addProperty($name, $value)
{
if (strpos($name, 'suggest.') === 0) {
return $this->addSubNode('suggest', substr($name, 8), $value);
}
if (strpos($name, 'extra.') === 0) {
return $this->addSubNode('extra', substr($name, 6), $value);
}
if (strpos($name, 'scripts.') === 0) {
return $this->addSubNode('scripts', substr($name, 8), $value);
}
return $this->addMainKey($name, $value);
}
public function removeProperty($name)
{
if (strpos($name, 'suggest.') === 0) {
return $this->removeSubNode('suggest', substr($name, 8));
}
if (strpos($name, 'extra.') === 0) {
return $this->removeSubNode('extra', substr($name, 6));
}
if (strpos($name, 'scripts.') === 0) {
return $this->removeSubNode('scripts', substr($name, 8));
}
return $this->removeMainKey($name);
}
public function addSubNode($mainNode, $name, $value, $append = true)
{
$decoded = JsonFile::parseJson($this->contents);
$subName = null;
if (in_array($mainNode, array('config', 'extra', 'scripts')) && false !== strpos($name, '.')) {
list($name, $subName) = explode('.', $name, 2);
}
// no main node yet
if (!isset($decoded[$mainNode])) {
if ($subName !== null) {
$this->addMainKey($mainNode, array($name => array($subName => $value)));
} else {
$this->addMainKey($mainNode, array($name => $value));
}
return true;
}
// main node content not match-able
$nodeRegex = '{'.self::$DEFINES.'^(?P<start> \s* \{ \s* (?: (?&string) \s* : (?&json) \s* , \s* )*?'.
preg_quote(JsonFile::encode($mainNode)).'\s*:\s*)(?P<content>(?&object))(?P<end>.*)}sx';
try {
if (!$this->pregMatch($nodeRegex, $this->contents, $match)) {
return false;
}
} catch (\RuntimeException $e) {
if ($e->getCode() === PREG_BACKTRACK_LIMIT_ERROR) {
return false;
}
throw $e;
}
$children = $match['content'];
// invalid match due to un-regexable content, abort
if (!@json_decode($children)) {
return false;
}
$that = $this;
// child exists
$childRegex = '{'.self::$DEFINES.'(?P<start>"'.preg_quote($name).'"\s*:\s*)(?P<content>(?&json))(?P<end>,?)}x';
if ($this->pregMatch($childRegex, $children, $matches)) {
$children = preg_replace_callback($childRegex, function ($matches) use ($subName, $value, $that) {
if ($subName !== null) {
$curVal = json_decode($matches['content'], true);
if (!is_array($curVal)) {
$curVal = array();
}
$curVal[$subName] = $value;
$value = $curVal;
}
return $matches['start'] . $that->format($value, 1) . $matches['end'];
}, $children);
} else {
$this->pregMatch('#^{ (?P<leadingspace>\s*?) (?P<content>\S+.*?)? (?P<trailingspace>\s*) }$#sx', $children, $match);
$whitespace = '';
if (!empty($match['trailingspace'])) {
$whitespace = $match['trailingspace'];
}
if (!empty($match['content'])) {
if ($subName !== null) {
$value = array($subName => $value);
}
// child missing but non empty children
if ($append) {
$children = preg_replace(
'#'.$whitespace.'}$#',
addcslashes(',' . $this->newline . $this->indent . $this->indent . JsonFile::encode($name).': '.$this->format($value, 1) . $whitespace . '}', '\\$'),
$children
);
} else {
$whitespace = '';
if (!empty($match['leadingspace'])) {
$whitespace = $match['leadingspace'];
}
$children = preg_replace(
'#^{'.$whitespace.'#',
addcslashes('{' . $whitespace . JsonFile::encode($name).': '.$this->format($value, 1) . ',' . $this->newline . $this->indent . $this->indent, '\\$'),
$children
);
}
} else {
if ($subName !== null) {
$value = array($subName => $value);
}
// children present but empty
$children = '{' . $this->newline . $this->indent . $this->indent . JsonFile::encode($name).': '.$this->format($value, 1) . $whitespace . '}';
}
}
$this->contents = preg_replace_callback($nodeRegex, function ($m) use ($children) {
return $m['start'] . $children . $m['end'];
}, $this->contents);
return true;
}
public function removeSubNode($mainNode, $name)
{
$decoded = JsonFile::parseJson($this->contents);
// no node or empty node
if (empty($decoded[$mainNode])) {
return true;
}
// no node content match-able
$nodeRegex = '{'.self::$DEFINES.'^(?P<start> \s* \{ \s* (?: (?&string) \s* : (?&json) \s* , \s* )*?'.
preg_quote(JsonFile::encode($mainNode)).'\s*:\s*)(?P<content>(?&object))(?P<end>.*)}sx';
try {
if (!$this->pregMatch($nodeRegex, $this->contents, $match)) {
return false;
}
} catch (\RuntimeException $e) {
if ($e->getCode() === PREG_BACKTRACK_LIMIT_ERROR) {
return false;
}
throw $e;
}
$children = $match['content'];
// invalid match due to un-regexable content, abort
if (!@json_decode($children, true)) {
return false;
}
$subName = null;
if (in_array($mainNode, array('config', 'extra', 'scripts')) && false !== strpos($name, '.')) {
list($name, $subName) = explode('.', $name, 2);
}
// no node to remove
if (!isset($decoded[$mainNode][$name]) || ($subName && !isset($decoded[$mainNode][$name][$subName]))) {
return true;
}
// try and find a match for the subkey
$keyRegex = str_replace('/', '\\\\?/', preg_quote($name));
if ($this->pregMatch('{"'.$keyRegex.'"\s*:}i', $children)) {
// find best match for the value of "name"
if (preg_match_all('{'.self::$DEFINES.'"'.$keyRegex.'"\s*:\s*(?:(?&json))}x', $children, $matches)) {
$bestMatch = '';
foreach ($matches[0] as $match) {
if (strlen($bestMatch) < strlen($match)) {
$bestMatch = $match;
}
}
$childrenClean = preg_replace('{,\s*'.preg_quote($bestMatch).'}i', '', $children, -1, $count);
if (1 !== $count) {
$childrenClean = preg_replace('{'.preg_quote($bestMatch).'\s*,?\s*}i', '', $childrenClean, -1, $count);
if (1 !== $count) {
return false;
}
}
}
} else {
$childrenClean = $children;
}
if (!isset($childrenClean)) {
throw new \InvalidArgumentException("JsonManipulator: \$childrenClean is not defined. Please report at https://github.com/composer/composer/issues/new.");
}
// no child data left, $name was the only key in
$this->pregMatch('#^{ \s*? (?P<content>\S+.*?)? (?P<trailingspace>\s*) }$#sx', $childrenClean, $match);
if (empty($match['content'])) {
$newline = $this->newline;
$indent = $this->indent;
$this->contents = preg_replace_callback($nodeRegex, function ($matches) use ($indent, $newline) {
return $matches['start'] . '{' . $newline . $indent . '}' . $matches['end'];
}, $this->contents);
// we have a subname, so we restore the rest of $name
if ($subName !== null) {
$curVal = json_decode($children, true);
unset($curVal[$name][$subName]);
$this->addSubNode($mainNode, $name, $curVal[$name]);
}
return true;
}
$that = $this;
$this->contents = preg_replace_callback($nodeRegex, function ($matches) use ($that, $name, $subName, $childrenClean) {
if ($subName !== null) {
$curVal = json_decode($matches['content'], true);
unset($curVal[$name][$subName]);
$childrenClean = $that->format($curVal);
}
return $matches['start'] . $childrenClean . $matches['end'];
}, $this->contents);
return true;
}
public function addMainKey($key, $content)
{
$decoded = JsonFile::parseJson($this->contents);
$content = $this->format($content);
// key exists already
$regex = '{'.self::$DEFINES.'^(?P<start>\s*\{\s*(?:(?&string)\s*:\s*(?&json)\s*,\s*)*?)'.
'(?P<key>'.preg_quote(JsonFile::encode($key)).'\s*:\s*(?&json))(?P<end>.*)}sx';
if (isset($decoded[$key]) && $this->pregMatch($regex, $this->contents, $matches)) {
// invalid match due to un-regexable content, abort
if (!@json_decode('{'.$matches['key'].'}')) {
return false;
}
$this->contents = $matches['start'] . JsonFile::encode($key).': '.$content . $matches['end'];
return true;
}
// append at the end of the file and keep whitespace
if ($this->pregMatch('#[^{\s](\s*)\}$#', $this->contents, $match)) {
$this->contents = preg_replace(
'#'.$match[1].'\}$#',
addcslashes(',' . $this->newline . $this->indent . JsonFile::encode($key). ': '. $content . $this->newline . '}', '\\$'),
$this->contents
);
return true;
}
// append at the end of the file
$this->contents = preg_replace(
'#\}$#',
addcslashes($this->indent . JsonFile::encode($key). ': '.$content . $this->newline . '}', '\\$'),
$this->contents
);
return true;
}
public function removeMainKey($key)
{
$decoded = JsonFile::parseJson($this->contents);
if (!array_key_exists($key, $decoded)) {
return true;
}
// key exists already
$regex = '{'.self::$DEFINES.'^(?P<start>\s*\{\s*(?:(?&string)\s*:\s*(?&json)\s*,\s*)*?)'.
'(?P<removal>'.preg_quote(JsonFile::encode($key)).'\s*:\s*(?&json))\s*,?\s*(?P<end>.*)}sx';
if ($this->pregMatch($regex, $this->contents, $matches)) {
// invalid match due to un-regexable content, abort
if (!@json_decode('{'.$matches['removal'].'}')) {
return false;
}
// check that we are not leaving a dangling comma on the previous line if the last line was removed
if (preg_match('#,\s*$#', $matches['start']) && preg_match('#^\}$#', $matches['end'])) {
$matches['start'] = rtrim(preg_replace('#,(\s*)$#', '$1', $matches['start']), $this->indent);
}
$this->contents = $matches['start'] . $matches['end'];
if (preg_match('#^\{\s*\}\s*$#', $this->contents)) {
$this->contents = "{\n}";
}
return true;
}
return false;
}
public function removeMainKeyIfEmpty($key)
{
$decoded = JsonFile::parseJson($this->contents);
if (!array_key_exists($key, $decoded)) {
return true;
}
if (is_array($decoded[$key]) && count($decoded[$key]) === 0) {
return $this->removeMainKey($key);
}
return true;
}
public function format($data, $depth = 0)
{
if (is_array($data)) {
reset($data);
if (is_numeric(key($data))) {
foreach ($data as $key => $val) {
$data[$key] = $this->format($val, $depth + 1);
}
return '['.implode(', ', $data).']';
}
$out = '{' . $this->newline;
$elems = array();
foreach ($data as $key => $val) {
$elems[] = str_repeat($this->indent, $depth + 2) . JsonFile::encode($key). ': '.$this->format($val, $depth + 1);
}
return $out . implode(','.$this->newline, $elems) . $this->newline . str_repeat($this->indent, $depth + 1) . '}';
}
return JsonFile::encode($data);
}
protected function detectIndenting()
{
if ($this->pregMatch('{^([ \t]+)"}m', $this->contents, $match)) {
$this->indent = $match[1];
} else {
$this->indent = ' ';
}
}
protected function pregMatch($re, $str, &$matches = array())
{
$count = preg_match($re, $str, $matches);
if ($count === false) {
switch (preg_last_error()) {
case PREG_NO_ERROR:
throw new \RuntimeException('Failed to execute regex: PREG_NO_ERROR', PREG_NO_ERROR);
case PREG_INTERNAL_ERROR:
throw new \RuntimeException('Failed to execute regex: PREG_INTERNAL_ERROR', PREG_INTERNAL_ERROR);
case PREG_BACKTRACK_LIMIT_ERROR:
throw new \RuntimeException('Failed to execute regex: PREG_BACKTRACK_LIMIT_ERROR', PREG_BACKTRACK_LIMIT_ERROR);
case PREG_RECURSION_LIMIT_ERROR:
throw new \RuntimeException('Failed to execute regex: PREG_RECURSION_LIMIT_ERROR', PREG_RECURSION_LIMIT_ERROR);
case PREG_BAD_UTF8_ERROR:
throw new \RuntimeException('Failed to execute regex: PREG_BAD_UTF8_ERROR', PREG_BAD_UTF8_ERROR);
case PREG_BAD_UTF8_OFFSET_ERROR:
throw new \RuntimeException('Failed to execute regex: PREG_BAD_UTF8_OFFSET_ERROR', PREG_BAD_UTF8_OFFSET_ERROR);
case 6: // PREG_JIT_STACKLIMIT_ERROR
if (PHP_VERSION_ID > 70000) {
throw new \RuntimeException('Failed to execute regex: PREG_JIT_STACKLIMIT_ERROR', 6);
}
// no break
default:
throw new \RuntimeException('Failed to execute regex: Unknown error');
}
}
return $count;
}
}
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