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@@ -0,0 +1,93 @@
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+<?php
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+
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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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+
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+namespace Composer\Json;
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+
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+use Composer\Repository\RepositoryManager;
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+
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+/**
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+ * Reads/writes json files.
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+ *
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+ * @author Konstantin Kudryashiv <ever.zet@gmail.com>
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+ */
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+class JsonFile
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+{
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+ private $path;
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+
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+ /**
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+ * Initializes json file reader/parser.
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+ *
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+ * @param string $lockFile path to a lockfile
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+ */
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+ public function __construct($path)
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+ {
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+ $this->path = $path;
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+ }
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+
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+ /**
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+ * Checks whether json file exists.
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+ *
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+ * @return Boolean
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+ */
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+ public function exists()
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+ {
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+ return is_file($this->path);
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+ }
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+
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+ /**
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+ * Reads json file.
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+ *
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+ * @param string $json path or json string
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+ *
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+ * @return array
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+ */
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+ public function read()
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+ {
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+ $json = file_get_contents($this->path);
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+ $config = json_decode($json, true);
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+ if (!$config) {
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+ switch (json_last_error()) {
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+ case JSON_ERROR_NONE:
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+ $msg = 'No error has occurred, is your composer.json file empty?';
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+ break;
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+ case JSON_ERROR_DEPTH:
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+ $msg = 'The maximum stack depth has been exceeded';
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+ break;
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+ case JSON_ERROR_STATE_MISMATCH:
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+ $msg = 'Invalid or malformed JSON';
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+ break;
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+ case JSON_ERROR_CTRL_CHAR:
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+ $msg = 'Control character error, possibly incorrectly encoded';
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+ break;
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+ case JSON_ERROR_SYNTAX:
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+ $msg = 'Syntax error';
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+ break;
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+ case JSON_ERROR_UTF8:
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+ $msg = 'Malformed UTF-8 characters, possibly incorrectly encoded';
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+ break;
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+ }
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+ throw new \UnexpectedValueException('Incorrect composer.json file: '.$msg);
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+ }
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+
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+ return $config;
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+ }
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+
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+ /**
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+ * Writes json file.
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+ *
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+ * @param array $hash writes hash into json file
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+ */
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+ public function write(array $hash)
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+ {
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+ file_put_contents($this->path, json_encode($hash));
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+ }
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+}
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everzet