cxxfds-service/app/Models/ApplicationFile.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Support\Facades\Storage;

class ApplicationFile extends Model
{
    protected $fillable = [
        'application_id',
        'kind',
        'disk',
        'path',
        'original_name',
        'size',
        'mime',
    ];

    public function application(): BelongsTo
    {
        return $this->belongsTo(Application::class);
    }

    public function publicUrl(): string
    {
        $u = Storage::disk($this->disk)->url($this->path);

        return preg_replace('#([^:])//+#', '$1/', $u) ?? $u;
    }
}