<?php
declare(strict_types=1);

namespace Esun\PromotionPopup\Model\Config\Source;

use Magento\Framework\Data\OptionSourceInterface;

class Frequency implements OptionSourceInterface
{
    public const ALWAYS = 'always';
    public const SESSION = 'session';
    public const DAILY = 'daily';
    public const CAMPAIGN = 'campaign';

    public function toOptionArray(): array
    {
        return [
            ['value' => self::DAILY, 'label' => __('Once per Day')],
            ['value' => self::SESSION, 'label' => __('Once per Session')],
            ['value' => self::CAMPAIGN, 'label' => __('Once per Campaign Version')],
            ['value' => self::ALWAYS, 'label' => __('Every Eligible Page View')],
        ];
    }
}