Init

app/Rules/TemporaryFileExists.php

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+<?php
+
+namespace App\Rules;
+
+use App\Models\TemporaryUpload;
+use Closure;
+use Illuminate\Contracts\Validation\ValidationRule;
+use Storage;
+
+class TemporaryFileExists implements ValidationRule
+{
+    /**
+     * Run the validation rule.
+     *
+     * @param  \Closure(string): \Illuminate\Translation\PotentiallyTranslatedString  $fail
+     */
+    public function validate(string $attribute, mixed $value, Closure $fail): void
+    {
+        if (! Storage::disk('public')->exists($value) || ! TemporaryUpload::where('path', $value)->exists()) {
+            $fail(__('The :attribute does not exist.', ['attribute' => $attribute]));
+        }
+    }
+}