Current state

app/Helpers/Thumb.php

@@ -0,0 +1,78 @@
+<?php
+
+namespace App\Helpers;
+
+use Illuminate\Support\Facades\Storage;
+use App\Services\ThumbnailService;
+
+class Thumb
+{
+    /**
+     * Return a thumbnail URL.
+     *
+     * Usage:
+     * - `Thumb::url($filePath)` - fallback mapping by filename or Storage::url
+    * - `Thumb::url($filePath, $id, $ext)` - resolve hash-based CDN URL when possible
+     *
+     * @param string|null $filePath
+     * @param int|null $id
+     * @param string|null $ext
+     * @param int $size  // legacy size code: 4 -> small(320), 6 -> medium(600)
+     * @return string
+     */
+    public static function url(?string $filePath, ?int $id = null, ?string $ext = null, int $size = 6): string
+    {
+        return ThumbnailService::url($filePath, $id, $ext, $size);
+    }
+
+    /**
+     * Build a new-style thumbnail URL using hash and extension.
+    * Example: http://files.skinbase.org/md/43/f8/43f87a...360.webp
+     *
+     * @param string|null $hash
+     * @param string|null $ext
+     * @param string $sizeKey One of sm, md, lg, xl
+     * @return string|null
+     */
+    public static function fromHash(?string $hash, ?string $ext, string $sizeKey = 'md'): ?string
+    {
+        return ThumbnailService::fromHash($hash, $ext, $sizeKey);
+    }
+
+    /**
+     * Build a simple srcset for responsive thumbnails.
+     * Uses sm (320w) and md (600w) by default to match legacy sizes.
+     *
+     * @param string|null $hash
+     * @param string|null $ext
+     * @return string|null
+     */
+    public static function srcsetFromHash(?string $hash, ?string $ext): ?string
+    {
+        return ThumbnailService::srcsetFromHash($hash, $ext);
+    }
+
+    /**
+     * Return encoded id string using legacy algorithm or fallback base62.
+     */
+    public static function encodeId(int $id): string
+    {
+        if (class_exists('\App\Services\LegacyService') && method_exists('\App\Services\LegacyService', 'encode')) {
+            return \App\Services\LegacyService::encode($id);
+        }
+
+        return self::base62encode($id);
+    }
+
+    private static function base62encode(int $val, int $base = 62, string $chars = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'): string
+    {
+        $str = '';
+        if ($val < 0) return $str;
+        do {
+            $i = $val % $base;
+            $str = $chars[$i] . $str;
+            $val = intdiv($val - $i, $base);
+        } while ($val > 0);
+        return $str;
+    }
+}