module-vendor-sales-report/Model/EmailSender.php

<?php
namespace Shopkeeper\VendorSalesReport\Model;

use Magento\Framework\Mail\Template\TransportBuilder;
use Magento\Framework\Translate\Inline\StateInterface;
use Magento\Store\Model\StoreManagerInterface;
use Shopkeeper\VendorSalesReport\Helper\Data as ConfigHelper;
use Psr\Log\LoggerInterface;

class EmailSender
{
    /**
     * @var TransportBuilder
     */
    protected $transportBuilder;

    /**
     * @var StateInterface
     */
    protected $inlineTranslation;

    /**
     * @var StoreManagerInterface
     */
    protected $storeManager;

    /**
     * @var ConfigHelper
     */
    protected $configHelper;

    /**
     * @var LoggerInterface
     */
    protected $logger;

    /**
     * @param TransportBuilder $transportBuilder
     * @param StateInterface $inlineTranslation
     * @param StoreManagerInterface $storeManager
     * @param ConfigHelper $configHelper
     * @param LoggerInterface $logger
     */
    public function __construct(
        TransportBuilder $transportBuilder,
        StateInterface $inlineTranslation,
        StoreManagerInterface $storeManager,
        ConfigHelper $configHelper,
        LoggerInterface $logger
    ) {
        $this->transportBuilder = $transportBuilder;
        $this->inlineTranslation = $inlineTranslation;
        $this->storeManager = $storeManager;
        $this->configHelper = $configHelper;
        $this->logger = $logger;
    }

    /**
     * Send report email
     *
     * @param string $csvContent
     * @param string $filename
     * @param string $month
     * @param string $year
     * @return bool
     */
    public function sendReport($csvContent, $filename, $month = null, $year = null)
    {
        if (!$this->configHelper->isEmailEnabled()) {
            return false;
        }

        $recipients = $this->configHelper->getEmailRecipients();
        if (empty($recipients)) {
            $this->logger->warning('Vendor Sales Report: No email recipients configured');
            return false;
        }

        try {
            $this->inlineTranslation->suspend();

            $sender = [
                'name' => $this->storeManager->getStore()->getName(),
                'email' => $this->storeManager->getStore()->getConfig('trans_email/' . $this->configHelper->getEmailSender() . '/email')
            ];

            $subject = $this->configHelper->getEmailSubject($month, $year);

            $transport = $this->transportBuilder
                ->setTemplateIdentifier('vendorsalesreport_email_template')
                ->setTemplateOptions([
                    'area' => \Magento\Framework\App\Area::AREA_ADMINHTML,
                    'store' => \Magento\Store\Model\Store::DEFAULT_STORE_ID,
                ])
                ->setTemplateVars([
                    'subject' => $subject,
                    'month' => $month,
                    'year' => $year
                ])
                ->setFromByScope($sender)
                ->addTo($recipients)
                ->addAttachment($csvContent, $filename, 'text/csv')
                ->getTransport();

            $transport->sendMessage();

            $this->inlineTranslation->resume();

            return true;
        } catch (\Exception $e) {
            $this->logger->error('Vendor Sales Report Email Error: ' . $e->getMessage());
            $this->inlineTranslation->resume();
            return false;
        }
    }
}