Adding Project API Class, and anothers classes to handle bpmn layer model

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

@@ -0,0 +1,68 @@
+<?php
+namespace ProcessMaker\Util;
+
+class Hash
+{
+    /**
+     * Generate random number
+     *
+     * @author Fernando Ontiveros Lira <fernando@colosa.com>
+     * @access public
+     * @return string
+     */
+    public static function generateUID()
+    {
+        do {
+            $sUID = str_replace('.', '0', uniqid(rand(0, 999999999), true));
+        } while (strlen( $sUID ) != 32);
+
+        return $sUID;
+    }
+
+    /**
+     * Generate a numeric or alphanumeric code
+     *
+     * @author Julio Cesar Laura Avendaño <juliocesar@colosa.com>
+     * @access public
+     * @param int $iDigits
+     * @param string $sType
+     * @return string
+     */
+    public function generateCode($iDigits = 4, $sType = 'NUMERIC')
+    {
+        if (($iDigits < 4) || ($iDigits > 50)) {
+            $iDigits = 4;
+        }
+        if (($sType != 'NUMERIC') && ($sType != 'ALPHA') && ($sType != 'ALPHANUMERIC')) {
+            $sType = 'NUMERIC';
+        }
+
+        $aValidCharacters = array(
+            '0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F','G','H',
+            'I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'
+        );
+
+        switch ($sType) {
+            case 'NUMERIC':
+                $iMin = 0;
+                $iMax = 9;
+                break;
+            case 'ALPHA':
+                $iMin = 10;
+                $iMax = 35;
+                break;
+            case 'ALPHANUMERIC':
+                $iMin = 0;
+                $iMax = 35;
+                break;
+        }
+
+        $sCode = '';
+        for ($i = 0; $i < $iDigits; $i ++) {
+            $sCode .= $aValidCharacters[rand($iMin, $iMax)];
+        }
+
+        return $sCode;
+    }
+}
+