From fc9de5b15c224618c50059ae1715f2c2b129bad2 Mon Sep 17 00:00:00 2001
From: Chris <christian@haschek.at>
Date: Sat, 21 Oct 2023 22:12:56 +0200
Subject: [PATCH] added unique but sortable time

---
 web/inc/classes/Page.class.php |  3 +-
 web/inc/helpers.php            | 55 ++++++++++++++++++++++++----------
 web/pages/login/controller.php |  9 ++++++
 3 files changed, 50 insertions(+), 17 deletions(-)

diff --git a/web/inc/classes/Page.class.php b/web/inc/classes/Page.class.php
index 24e56e1..67bf33f 100644
--- a/web/inc/classes/Page.class.php
+++ b/web/inc/classes/Page.class.php
@@ -104,7 +104,8 @@ class Page
         
         //render template by running include
         ob_start();
-        extract($this->variables);
+        if(is_array($this->variables))
+            extract($this->variables);
         if($templatefile!= '')
             include($templatefile);
         $pagecontent = ob_get_contents();
diff --git a/web/inc/helpers.php b/web/inc/helpers.php
index 58c49f9..3555a60 100644
--- a/web/inc/helpers.php
+++ b/web/inc/helpers.php
@@ -147,26 +147,49 @@ function getHighestSQLVersion()
     return end($files);
 }
 
-function gen_uuid() {
-    return sprintf( '%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
-        // 32 bits for "time_low"
-        mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ),
+function gen_ulid($milliseconds = null,$lowercase = false) {
+    if($milliseconds===null)
+        $milliseconds = (int) (microtime(true) * 1000);
+    $encodingChars = '0123456789ABCDEFGHJKMNPQRSTVWXYZ';
+    $encodingLength = 32;
+    $randomLength = 16;
+    $lastRandChars = [];
+    $timeLength = 10;
 
-        // 16 bits for "time_mid"
-        mt_rand( 0, 0xffff ),
+        $timeChars = '';
+        $randChars = '';
 
-        // 16 bits for "time_hi_and_version",
-        // four most significant bits holds version number 4
-        mt_rand( 0, 0x0fff ) | 0x4000,
+        for ($i = $timeLength - 1; $i >= 0; $i--) {
+            $mod = $milliseconds % $encodingLength;
+            $timeChars = $encodingChars[$mod].$timeChars;
+            $milliseconds = ($milliseconds - $mod) / $encodingLength;
+        }
 
-        // 16 bits, 8 bits for "clk_seq_hi_res",
-        // 8 bits for "clk_seq_low",
-        // two most significant bits holds zero and one for variant DCE1.1
-        mt_rand( 0, 0x3fff ) | 0x8000,
+        for ($i = 0; $i < $randomLength; $i++) {
+            $lastRandChars[$i] = random_int(0, 31);
+        }
 
-        // 48 bits for "node"
-        mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff )
-    );
+        for ($i = 0; $i < $randomLength; $i++) {
+            $randChars .= $encodingChars[$lastRandChars[$i]];
+        }
+
+        return ($value = $timeChars . $randChars) && $lowercase ? strtolower($value) : strtoupper($value);
+}
+
+function ulid_to_timestamp($ulid)
+{
+    $encodingChars = '0123456789ABCDEFGHJKMNPQRSTVWXYZ';
+    $encodingLength = 32;
+    $timeLength = 10;
+
+    $timeChars = substr($ulid,0,$timeLength);
+    $time = 0;
+
+    for ($i = 0; $i < $timeLength; $i++) {
+        $time = $time * $encodingLength + strpos($encodingChars, $timeChars[$i]);
+    }
+
+    return $time;
 }
 
 function escape($str)
diff --git a/web/pages/login/controller.php b/web/pages/login/controller.php
index dda5f65..a6ab210 100644
--- a/web/pages/login/controller.php
+++ b/web/pages/login/controller.php
@@ -9,6 +9,15 @@ class Login extends Page {
         //return print_r($_REQUEST, true);
     }
 
+    function test()
+    {
+        return nl2br(print_r([
+            'uuid' => gen_ulid(),
+            'timestamp' => ulid_to_timestamp("01HD9XN98F8SGT01X527KBNHRN"),
+            'freshtime' => ulid_to_timestamp(gen_ulid())
+        ],true));
+    }
+
     function validate()
     {
         $email = $_REQUEST['email'];