Add JsonManipulator class for doing raw manipulation of json strings
Jordi Boggiano
parent
7cd5f4c142
commit
f5e0918104
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<?php
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/*
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* This file is part of Composer.
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*
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* (c) Nils Adermann <naderman@naderman.de>
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* Jordi Boggiano <j.boggiano@seld.be>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Composer\Json;
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/**
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* @author Jordi Boggiano <j.boggiano@seld.be>
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*/
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class JsonManipulator
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{
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private $contents;
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private $newline;
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private $indent;
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public function __construct($contents)
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{
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if (!preg_match('#^\{(.*)\}$#s', trim($contents), $match)) {
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throw new \InvalidArgumentException('The json file must be an object ({})');
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}
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$this->newline = false !== strpos("\r\n", $contents) ? "\r\n": "\n";
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$this->contents = '{' . $match[1] . '}';
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$this->detectIndenting();
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}
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public function getContents()
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{
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return $this->contents . $this->newline;
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}
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public function addLink($type, $package, $constraint)
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{
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// no link of that type yet
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if (!preg_match('#"'.$type.'":\s*\{#', $this->contents)) {
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$this->addMainKey($type, $this->format(array($package => $constraint)));
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return true;
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}
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$linksRegex = '#("'.$type.'":\s*\{)([^}]+)(\})#s';
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if (!preg_match($linksRegex, $this->contents, $match)) {
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return false;
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}
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$links = $match[2];
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$packageRegex = str_replace('/', '\\\\?/', preg_quote($package));
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// link exists already
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if (preg_match('{"'.$packageRegex.'"\s*:}i', $links)) {
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$links = preg_replace('{"'.$packageRegex.'"(\s*:\s*)"[^"]+"}i', JsonFile::encode($package).'$1"'.$constraint.'"', $links);
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} elseif (preg_match('#[^\s](\s*)$#', $links, $match)) {
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// link missing but non empty links
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$links = preg_replace(
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'#'.$match[1].'$#',
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',' . $this->newline . $this->indent . $this->indent . JsonFile::encode($package).': '.JsonFile::encode($constraint) . $match[1],
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$links
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);
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} else {
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// links empty
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$links = $this->newline . $this->indent . $this->indent . JsonFile::encode($package).': '.JsonFile::encode($constraint) . $links;
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}
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$this->contents = preg_replace($linksRegex, '$1'.$links.'$3', $this->contents);
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return true;
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}
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public function addMainKey($key, $content)
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{
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if (preg_match('#[^{\s](\s*)\}$#', $this->contents, $match)) {
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$this->contents = preg_replace(
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'#'.$match[1].'\}$#',
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',' . $this->newline . $this->indent . JsonFile::encode($key). ': '. $content . $this->newline . '}',
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$this->contents
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);
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} else {
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$this->contents = preg_replace(
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'#\}$#',
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$this->indent . JsonFile::encode($key). ': '.$content . $this->newline . '}',
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$this->contents
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);
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}
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}
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protected function format($data)
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{
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if (is_array($data)) {
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reset($data);
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if (is_numeric(key($data))) {
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return '['.implode(', ', $data).']';
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}
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$out = '{' . $this->newline;
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foreach ($data as $key => $val) {
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$elems[] = $this->indent . $this->indent . JsonFile::encode($key). ': '.$this->format($val);
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}
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return $out . implode(','.$this->newline, $elems) . $this->newline . $this->indent . '}';
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}
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return JsonFile::encode($data);
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}
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protected function detectIndenting()
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{
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if (preg_match('{^(\s+)"}', $this->contents, $match)) {
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$this->indent = $match[1];
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} else {
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$this->indent = ' ';
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}
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}
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}
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@ -0,0 +1,134 @@
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<?php
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/*
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* This file is part of Composer.
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*
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* (c) Nils Adermann <naderman@naderman.de>
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* Jordi Boggiano <j.boggiano@seld.be>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Composer\Test\Json;
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use Composer\Json\JsonManipulator;
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class JsonManipulatorTest extends \PHPUnit_Framework_TestCase
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{
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/**
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* @dataProvider linkProvider
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*/
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public function testAddLink($json, $type, $package, $constraint, $expected)
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{
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$manipulator = new JsonManipulator($json);
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$this->assertTrue($manipulator->addLink($type, $package, $constraint));
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$this->assertEquals($expected, $manipulator->getContents());
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}
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public function linkProvider()
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{
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return array(
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array(
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'{
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}',
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'require',
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'vendor/baz',
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'qux',
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'{
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"require": {
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"vendor/baz": "qux"
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}
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}
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'
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),
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array(
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'{
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"foo": "bar"
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}',
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'require',
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'vendor/baz',
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'qux',
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'{
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"foo": "bar",
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"require": {
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"vendor/baz": "qux"
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}
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}
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'
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),
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array(
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'{
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"require": {
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}
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}',
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'require',
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'vendor/baz',
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'qux',
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'{
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"require": {
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"vendor/baz": "qux"
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}
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}
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'
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),
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array(
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'{
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"require": {
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"foo": "bar"
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}
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}',
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'require',
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'vendor/baz',
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'qux',
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'{
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"require": {
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"foo": "bar",
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"vendor/baz": "qux"
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}
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}
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'
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),
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array(
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'{
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"require":
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{
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"foo": "bar",
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"vendor/baz": "baz"
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}
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}',
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'require',
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'vendor/baz',
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'qux',
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'{
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"require":
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{
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"foo": "bar",
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"vendor/baz": "qux"
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}
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}
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'
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),
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array(
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'{
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"require":
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{
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"foo": "bar",
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"vendor\/baz": "baz"
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}
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}',
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'require',
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'vendor/baz',
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'qux',
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'{
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"require":
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{
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"foo": "bar",
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"vendor/baz": "qux"
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}
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}
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'
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),
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);
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}
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}
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