first commit.

2026-10-05 15:08:39 -03:00
commit b7799f9fff
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+<?php
+
+namespace Libs;
+
+/**
+ * ULID (Universally Unique Lexicographically Sortable Identifier) implementation.
+ *
+ * @author KJ
+ * @website https://kj2.me
+ * @license MIT
+ */
+class Ulid
+{
+    public const ENCODING_CHARS = '0123456789ABCDEFGHJKMNPQRSTVWXYZ';
+    public const ENCODING_LENGTH = 32;
+    public const RANDOM_LENGTH = 16;
+    public const TIME_LENGTH = 10;
+
+    /**
+     * @var int
+     */
+    private static $lastGenTime = 0;
+
+    /**
+     * @var array
+     */
+    private static $lastRandChars = [];
+
+    /**
+     * Generates a unique ULID.
+     *
+     * Borrowed from robinvdvleuten/ulid
+     *
+     * @return string
+     */
+    public static function generate(): string
+    {
+        $timestamp = (int) (microtime(true) * 1000);
+
+        $duplicateTime = $timestamp === static::$lastGenTime;
+        static::$lastGenTime = $timestamp;
+
+        $timeChars = '';
+        $randChars = '';
+
+        for ($i = static::TIME_LENGTH - 1; $i >= 0; $i--) {
+            $mod = $timestamp % static::ENCODING_LENGTH;
+            $timeChars = static::ENCODING_CHARS[$mod] . $timeChars;
+            $timestamp = ($timestamp - $mod) / static::ENCODING_LENGTH;
+        }
+
+        if (!$duplicateTime) {
+            for ($i = 0; $i < static::RANDOM_LENGTH; $i++) {
+                static::$lastRandChars[$i] = random_int(0, 31);
+            }
+        } else {
+            for ($i = static::RANDOM_LENGTH - 1; $i >= 0 && static::$lastRandChars[$i] === 31; $i--) {
+                static::$lastRandChars[$i] = 0;
+            }
+
+            static::$lastRandChars[$i]++;
+        }
+
+        for ($i = 0; $i < static::RANDOM_LENGTH; $i++) {
+            $randChars .= static::ENCODING_CHARS[static::$lastRandChars[$i]];
+        }
+
+        return $timeChars . $randChars;
+    }
+
+
+    /**
+     * Validates a ULID.
+     *
+     * @param string $ulid
+     *
+     * @return bool
+     */
+    public static function validate(string $ulid): bool
+    {
+        return (bool) preg_match('/^[0-9A-HJKMNPQRSTVWXYZ]{26}$/', strtoupper($ulid));
+    }
+}