First, initial commit

src/Meritoo/Common/Utilities/Composer.php

@@ -0,0 +1,69 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Utilities;
+
+use stdClass;
+
+/**
+ * Useful Composer-related methods (only static functions)
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class Composer
+{
+    /**
+     * Name of the Composer's main file with configuration in Json format
+     *
+     * @var string
+     */
+    const FILE_NAME_MAIN = 'composer.json';
+
+    /**
+     * Returns value from composer.json file
+     *
+     * @param string $composerJsonPath Path of composer.json file
+     * @param string $nodeName         Name of node who value should be returned
+     * @return string|null
+     */
+    public static function getValue($composerJsonPath, $nodeName)
+    {
+        $composerJsonString = is_string($composerJsonPath);
+        $composerJsonReadable = false;
+
+        if ($composerJsonString) {
+            $composerJsonReadable = is_readable($composerJsonPath);
+        }
+
+        /*
+         * Provided path or name of node are invalid?
+         * The composer.json file doesn't exist or isn't readable?
+         * Name of node is unknown?
+         *
+         * Nothing to do
+         */
+        if (!$composerJsonString || !is_string($nodeName) || !$composerJsonReadable || empty($nodeName)) {
+            return null;
+        }
+
+        $content = file_get_contents($composerJsonPath);
+        $data = json_decode($content);
+
+        /*
+         * Unknown data from the composer.json file or there is no node with given name?
+         * Nothing to do
+         */
+        if ($data === null || !isset($data->{$nodeName})) {
+            return null;
+        }
+
+        /* @var stdClass $data */
+        return $data->{$nodeName};
+    }
+}