Inline.php

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<?php
namespace Magento\GiftMessage\Block\Message;

use Magento\Customer\Model\Context;
use Magento\GiftMessage\Model\Message;

class Inline extends \Magento\Framework\View\Element\Template
{
    protected $_entity = null;

    protected $_type = null;

    protected $_giftMessage = null;

    protected $_template = 'Magento_GiftMessage::inline.phtml';

    protected $_giftMessageMessage = null;

    protected $_customerSession;

    protected $imageBuilder;

    protected $httpContext;

    protected $checkoutType;

    public function __construct(
        \Magento\Framework\View\Element\Template\Context $context,
        \Magento\Customer\Model\Session $customerSession,
        \Magento\GiftMessage\Helper\Message $giftMessageMessage,
        \Magento\Catalog\Block\Product\ImageBuilder $imageBuilder,
        \Magento\Framework\App\Http\Context $httpContext,
        array $data = []
    ) {
        $this->imageBuilder = $imageBuilder;
        $this->_giftMessageMessage = $giftMessageMessage;
        $this->_customerSession = $customerSession;
        parent::__construct($context, $data);
        $this->_isScopePrivate = true;
        $this->httpContext = $httpContext;
    }

    public function setEntity($entity)
    {
        $this->_entity = $entity;
        return $this;
    }

    public function getEntity()
    {
        return $this->_entity;
    }

    public function setType($type)
    {
        $this->_type = $type;
        return $this;
    }

    public function getType()
    {
        return $this->_type;
    }

    public function setCheckoutType($type)
    {
        $this->checkoutType = $type;
        return $this;
    }

    public function getCheckoutType()
    {
        return $this->checkoutType;
    }

    public function hasGiftMessage()
    {
        return $this->getEntity()->getGiftMessageId() > 0;
    }

    protected function _initMessage()
    {
        $this->_giftMessage = $this->_giftMessageMessage->getGiftMessage($this->getEntity()->getGiftMessageId());
        return $this;
    }

    public function getDefaultFrom()
    {
        if ($this->httpContext->getValue(Context::CONTEXT_AUTH)) {
            return $this->_customerSession->getCustomer()->getName();
        } else {
            return $this->getEntity()->getBillingAddress()->getName();
        }
    }

    public function getDefaultTo()
    {
        if ($this->getEntity()->getShippingAddress()) {
            return $this->getEntity()->getShippingAddress()->getName();
        } else {
            return $this->getEntity()->getName();
        }
    }

    public function getMessage($entity = null)
    {
        if ($this->_giftMessage === null) {
            $this->_initMessage();
        }

        if ($entity) {
            if (!$entity->getGiftMessage()) {
                $entity->setGiftMessage($this->_giftMessageMessage->getGiftMessage($entity->getGiftMessageId()));
            }
            return $entity->getGiftMessage();
        }

        return $this->_giftMessage;
    }

    public function getItems()
    {
        if (!$this->getData('items')) {
            $items = [];

            $entityItems = $this->getEntity()->getAllItems();
            $this->_eventManager->dispatch('gift_options_prepare_items', ['items' => $entityItems]);

            foreach ($entityItems as $item) {
                if ($item->getParentItem()) {
                    continue;
                }
                if ($this->isItemMessagesAvailable($item) || $item->getIsGiftOptionsAvailable()) {
                    $items[] = $item;
                }
            }
            $this->setData('items', $items);
        }
        return $this->getData('items');
    }

    public function isItemsAvailable()
    {
        return count($this->getItems()) > 0;
    }

    public function countItems()
    {
        return count($this->getItems());
    }

    public function getItemsHasMesssages()
    {
        return $this->getItemsHasMessages();
    }

    public function getItemsHasMessages()
    {
        foreach ($this->getItems() as $item) {
            if ($item->getGiftMessageId()) {
                return true;
            }
        }
        return false;
    }

    public function getEntityHasMessage()
    {
        return $this->getEntity()->getGiftMessageId() > 0;
    }

    public function getEscaped($value, $defaultValue = '')
    {
        return $this->escapeHtml(trim($value) != '' ? $value : $defaultValue);
    }

    public function isMessagesAvailable()
    {
        return $this->_giftMessageMessage->isMessagesAllowed('quote', $this->getEntity());
    }

    public function isItemMessagesAvailable($item)
    {
        $type = substr($this->getType(), 0, 5) == 'multi' ? 'address_item' : 'item';
        return $this->_giftMessageMessage->isMessagesAllowed($type, $item);
    }

    protected function _toHtml()
    {
        // render HTML when messages are allowed for order or for items only
        if ($this->isItemsAvailable() || $this->isMessagesAvailable()) {
            return parent::_toHtml();
        }
        return '';
    }

    public function getImage($product, $imageId, $attributes = [])
    {
        return $this->imageBuilder->create($product, $imageId, $attributes);
    }
}