From 2143343f96620e8ad266abda63f15d470aeefb43 Mon Sep 17 00:00:00 2001
From: jared gholston <jarbot@gmail.com>
Date: Mon, 28 Aug 2017 15:13:25 -0700
Subject: [PATCH] Add ability to seed a UUID to support UWP templates. The UWP
 project files require a GUID to be generated once and reused to reference
 project files.

---
 lime/tools/helpers/GUID.hx | 50 ++++++++++++++++++++++++++++----------
 1 file changed, 37 insertions(+), 13 deletions(-)

diff --git a/lime/tools/helpers/GUID.hx b/lime/tools/helpers/GUID.hx
index 76e903bb5..6c44509e9 100644
--- a/lime/tools/helpers/GUID.hx
+++ b/lime/tools/helpers/GUID.hx
@@ -1,15 +1,21 @@
 package lime.tools.helpers;
+import haxe.crypto.Sha1;
+import haxe.io.Bytes;
+import haxe.crypto.Crc32;
+
 
 // https://groups.google.com/d/msg/haxelang/N03kf5WSrTU/KU8nmsaqfIIJ
 class GUID {
 	
-	inline public static function randomIntegerWithinRange (min:Int, max:Int):Int {
+	inline public static function randomIntegerWithinRange (min:Int, max:Int, ?seeded:Bool = false):Int {
 		
-		return Math.floor(Math.random() * (1 + max - min) + min);
+		return seeded ?
+			Math.floor(GUID.seededRandom() * (1 + max - min) + min) :
+			Math.floor(Math.random() * (1 + max - min) + min);
 		
 	}
 	
-	public static function createRandomIdentifier (length:Int, radix:Int = 61):String {
+	public static function createRandomIdentifier (length:Int, radix:Int = 61, ?seeded:Bool = false):String {
 		
 		var characters = ['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', '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'];
 		var id:Array<String> = new Array<String> ();
@@ -17,25 +23,43 @@ class GUID {
 		
 		while (length-- > 0) {
 			
-			id.push (characters[GUID.randomIntegerWithinRange (0, radix)]);
+			id.push (characters[GUID.randomIntegerWithinRange (0, radix, seeded)]);
 		}
 		
 		return id.join('');
 	}
 	
-	public static function uuid ():String {
+	public static function uuid (?seeded:Bool = false):String {
 		
 		var specialChars = ['8', '9', 'A', 'B'];
-		
-		
-		return "{" + GUID.createRandomIdentifier (8, 15) + '-' + 
-			GUID.createRandomIdentifier (4, 15) + '-4' + 
-			GUID.createRandomIdentifier (3, 15) + '-' + 
-			specialChars[GUID.randomIntegerWithinRange (0, 3)] + 
-			GUID.createRandomIdentifier (3, 15) + '-' + 
-			GUID.createRandomIdentifier (12, 15) +
+
+		return "{" + GUID.createRandomIdentifier (8, 15, seeded) + '-' +
+			GUID.createRandomIdentifier (4, 15, seeded) + '-4' +
+			GUID.createRandomIdentifier (3, 15, seeded) + '-' +
+			specialChars[GUID.randomIntegerWithinRange (0, 3, seeded)] +
+			GUID.createRandomIdentifier (3, 15, seeded) + '-' +
+			GUID.createRandomIdentifier (12, 15, seeded) +
 			"}";
 		
 	}
+
+	private static var seed:Int = 0;
+
+	private static function setSeed(input:String):Int {
+		var inputBytes = Bytes.ofString(input);
+		var hashedBytes = Sha1.make(inputBytes);
+		return GUID.seed = Crc32.make(hashedBytes);
+	}
+
+	private static function seededRandom():Float {
+		GUID.seed++;
+		var x = Math.sin(GUID.seed) * 10000;
+		return x - Math.floor(x);
+	}
+
+	public static function seededUuid (seed:String):String {
+		GUID.setSeed(seed);
+		return uuid(true);
+	}
 	
 }
\ No newline at end of file