Adding ProcessMaker\Util\Common class utility and unit test

workflow/engine/src/ProcessMaker/Util/Common.php

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+<?php
+namespace ProcessMaker\Util;
+
+class Common
+{
+    /**
+     * Recursive version of glob php standard function
+     *
+     * @author Erik Amaru Ortiz <erik@colosa.com, aortiz.erik@gmail.com>
+     * @param string $pattern pattern for native glob function
+     * @param int|string $flags any valid flag for glob function
+     * @param bool $onlyFiles to filter return array with only matched files, or all matched results
+     * @return array array containing the recursive glob results
+     *
+     * Example:
+     *
+     *   Common::rglob("/example/path/*");
+     *
+     * it will returns:
+     *
+     *   Array
+     *   (
+     *       [0] => /example/path/README.txt
+     *       [1] => /example/path/composer.json
+     *       [4] => /example/path/one/one_text.txt
+     *       [6] => /example/path/two/two_text.txt
+     *       [7] => /example/path/two/two_one/two_one_text.txt
+     *       [8] => /example/path/two/two_one/build.json
+     *   )
+     *
+     * Example 2:
+     *
+     *   Common::rglob("/example/path/*.json");
+     *
+     * it will returns:
+     *
+     *   Array
+     *   (
+     *       [0] => /example/path/composer.json
+     *       [1] => /example/path/two/two_one/build.json
+     *   )
+     */
+    public static function rglob($pattern, $flags = 0, $onlyFiles = false)
+    {
+        $singlePattern = basename($pattern);
+
+        if (strpos($singlePattern, "*") !== false) {
+            $path = rtrim(str_replace($singlePattern, "", $pattern), DIRECTORY_SEPARATOR);
+        } else {
+            $singlePattern = "";
+            $path = $pattern;
+        }
+
+        $files = glob("$path/$singlePattern", $flags);
+        $dirs = glob("$path/*", GLOB_MARK|GLOB_ONLYDIR|GLOB_NOSORT);
+
+        foreach ($dirs as $dir) {
+            $files = array_merge($files, self::rglob("$dir/$singlePattern", $flags));
+        }
+
+        if ($onlyFiles) {
+            $files = array_filter($files, function($v) { return is_dir($v) ? false : true;});
+        }
+
+        return $files;
+    }
+
+    /**
+     * Returns the last version given a pattern of file name
+     *
+     * @param string $pattern a valid pattern for glob(...) native function
+     * @param int $flag php flags for glob(...) native function
+     * @return int
+     */
+    public static function getLastVersion($pattern, $flag = 0)
+    {
+        $files = glob($pattern, $flag);
+        $maxVersion = 0;
+
+        foreach ($files as $file) {
+            $filename = basename($file);
+
+            if (preg_match("/-([0-9]+)/", $filename, $match)) {
+                if ($maxVersion < $match[1]) {
+                    $maxVersion = $match[1];
+                }
+            }
+        }
+
+        return $maxVersion;
+    }
+}

workflow/engine/src/Tests/ProcessMaker/Util/CommonTest.php

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+<?php
+namespace Tests\ProcessMaker\Util;
+
+
+use ProcessMaker\Util;
+
+/**
+ * Class XmlExporterTest
+ *
+ * @package Tests\ProcessMaker\Project
+ * @author Erik Amaru Ortiz <aortiz.erik@gmail.com, erik@colosa.com>
+ */
+class XmlExporterTest extends \PHPUnit_Framework_TestCase
+{
+    function testGetLastVersion()
+    {
+        $lastVer = Util\Common::getLastVersion(__DIR__."/../../fixtures/files_struct/first/sample-*.txt");
+        $this->assertEquals(3, $lastVer);
+    }
+
+    function testGetLastVersionSec()
+    {
+        $lastVer = Util\Common::getLastVersion(__DIR__."/../../fixtures/files_struct/second/sample-*.txt");
+
+        $this->assertEquals(5, $lastVer);
+    }
+
+    /**
+     * Negative test, no matched files found
+     */
+    function testGetLastVersionThr()
+    {
+        $lastVer = Util\Common::getLastVersion(sys_get_temp_dir()."/sample-*.txt");
+
+        $this->assertEquals(0, $lastVer);
+    }
+}

workflow/engine/src/Tests/fixtures/files_struct/first/sample-1.txt

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+file sample-1.txt

workflow/engine/src/Tests/fixtures/files_struct/first/sample-2.txt

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+file sample-1.txt

workflow/engine/src/Tests/fixtures/files_struct/first/sample-3.txt

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+file sample-1.txt

workflow/engine/src/Tests/fixtures/files_struct/second/sample-1.txt

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+file sample-1.txt

workflow/engine/src/Tests/fixtures/files_struct/second/sample-2.txt

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+file sample-1.txt

workflow/engine/src/Tests/fixtures/files_struct/second/sample-3.txt

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+file sample-1.txt

workflow/engine/src/Tests/fixtures/files_struct/second/sample-5.txt

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+file sample-1.txt