nexusphp/app/Models/Medal.php

<?php

namespace App\Models;

use Carbon\Carbon;

class Medal extends NexusModel
{
    const GET_TYPE_EXCHANGE = 1;

    const GET_TYPE_GRANT = 2;

    public static $getTypeText = [
        self::GET_TYPE_EXCHANGE => ['text' => 'Exchange'],
        self::GET_TYPE_GRANT => ['text' => 'Grant'],
    ];

    protected $fillable = ['name', 'description', 'image_large', 'image_small', 'price', 'duration', 'get_type'];

    public $timestamps = true;

    public function getGetTypeTextAttribute($value): string
    {
        return self::$getTypeText[$this->get_type]['text'] ?? '';
    }

    public function users(): \Illuminate\Database\Eloquent\Relations\BelongsToMany
    {
        return $this->belongsToMany(User::class, 'user_medals', 'medal_id', 'uid')->withTimestamps();
    }

    public function valid_users(): \Illuminate\Database\Eloquent\Relations\BelongsToMany
    {
        return $this->users()->where(function ($query) {
            $query->whereNull('user_medals.expire_at')->orWhere('user_medals.expire_at', '>=', Carbon::now());
        });
    }

}