magento2/app/code/Magento/Newsletter/Block/Adminhtml/Queue/Edit.php

<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
namespace Magento\Newsletter\Block\Adminhtml\Queue;

use Magento\Framework\View\Element\AbstractBlock;
use Magento\Newsletter\Model\Queue as ModelQueue;

/**
 * Newsletter queue edit block
 *
 * @api
 * @since 100.0.2
 */
class Edit extends \Magento\Backend\Block\Template
{
    /**
     * @var string
     */
    protected $_template = 'Magento_Newsletter::queue/edit.phtml';

    /**
     * Magento Framework Core Registry
     *
     * @var \Magento\Framework\Registry
     */
    protected $_coreRegistry = null;

    /**
     * @param \Magento\Backend\Block\Template\Context $context
     * @param \Magento\Framework\Registry $registry
     * @param array $data
     */
    public function __construct(
        \Magento\Backend\Block\Template\Context $context,
        \Magento\Framework\Registry $registry,
        array $data = []
    ) {
        $this->_coreRegistry = $registry;
        parent::__construct($context, $data);
    }

    /**
     * Queue Edit constructor
     *
     * @return void
     */
    protected function _construct()
    {
        parent::_construct();
        $templateId = $this->getRequest()->getParam('template_id');
        if ($templateId) {
            $this->setTemplateId($templateId);
        }
    }

    /**
     * Retrieve current Newsletter Queue Object
     *
     * @return ModelQueue
     */
    public function getQueue()
    {
        return $this->_coreRegistry->registry('current_queue');
    }

    /**
     * Before rendering html, but after trying to load cache
     *
     * @return AbstractBlock
     */
    protected function _beforeToHtml()
    {
        $this->setChild(
            'form',
            $this->getLayout()->createBlock(\Magento\Newsletter\Block\Adminhtml\Queue\Edit\Form::class, 'form')
        );
        return parent::_beforeToHtml();
    }

    /**
     * Get the url for save
     *
     * @return string
     */
    public function getSaveUrl()
    {
        if ($this->getTemplateId()) {
            $params = ['template_id' => $this->getTemplateId()];
        } else {
            $params = ['id' => $this->getRequest()->getParam('id')];
        }
        return $this->getUrl('*/*/save', $params);
    }

    /**
     * Prepare for the layout
     *
     * @return AbstractBlock
     */
    protected function _prepareLayout()
    {
        $this->getToolbar()->addChild(
            'back_button',
            \Magento\Backend\Block\Widget\Button::class,
            [
                'label' => __('Back'),
                'onclick' => "window.location.href = '" . $this->getUrl(
                    $this->getTemplateId() ? '*/template' : '*/*'
                ) . "'",
                'class' => 'action-back'
            ]
        );

        $this->getToolbar()->addChild(
            'reset_button',
            \Magento\Backend\Block\Widget\Button::class,
            ['label' => __('Reset'), 'class' => 'reset', 'onclick' => 'window.location = window.location']
        );

        $this->getToolbar()->addChild(
            'preview_button',
            \Magento\Backend\Block\Widget\Button::class,
            ['label' => __('Preview Template'), 'onclick' => 'queueControl.preview();', 'class' => 'preview']
        );

        $this->getToolbar()->addChild(
            'save_button',
            \Magento\Backend\Block\Widget\Button::class,
            [
                'label' => __('Save Newsletter'),
                'class' => 'save primary',
                'data_attribute' => [
                    'mage-init' => ['button' => ['event' => 'save', 'target' => '#queue_edit_form']],
                ]
            ]
        );
        if ($this->getCanResume()) {
            $this->getToolbar()->addChild(
                'save_and_resume',
                \Magento\Backend\Block\Widget\Button::class,
                [
                    'label' => __('Save and Resume'),
                    'class' => 'save',
                    'data_attribute' => [
                        'mage-init' => [
                            'button' => [
                                'event' => 'save',
                                'target' => '#queue_edit_form',
                                'eventData' => ['action' => ['args' => ['_resume' => 1]]],
                            ],
                        ],
                    ]
                ]
            );
        }

        return parent::_prepareLayout();
    }

    /**
     * Return preview action url for form
     *
     * @return string
     */
    public function getPreviewUrl()
    {
        if ($this->getTemplateId()) {
            $params = ['template_id' => $this->getTemplateId()];
        } else {
            $params = ['id' => $this->getRequest()->getParam('id')];
        }
        return $this->getUrl('*/*/preview', $params);
    }

    /**
     * Retrieve Preview Button HTML
     *
     * @return string
     */
    public function getPreviewButtonHtml()
    {
        return $this->getChildHtml('preview_button');
    }

    /**
     * Retrieve Save Button HTML
     *
     * @return string
     */
    public function getSaveButtonHtml()
    {
        return $this->getChildHtml('save_button');
    }

    /**
     * Retrieve Reset Button HTML
     *
     * @return string
     */
    public function getResetButtonHtml()
    {
        return $this->getChildHtml('reset_button');
    }

    /**
     * Retrieve Back Button HTML
     *
     * @return string
     */
    public function getBackButtonHtml()
    {
        return $this->getChildHtml('back_button');
    }

    /**
     * Retrieve Resume Button HTML
     *
     * @return string
     */
    public function getResumeButtonHtml()
    {
        return $this->getChildHtml('save_and_resume');
    }

    /**
     * Getter for availability preview mode
     *
     * @return bool
     * @SuppressWarnings(PHPMD.BooleanGetMethodName)
     */
    public function getIsPreview()
    {
        return !in_array(
            $this->getQueue()->getQueueStatus(),
            [ModelQueue::STATUS_NEVER, ModelQueue::STATUS_PAUSE]
        );
    }

    /**
     * Getter for single store mode check
     *
     * @return bool
     */
    protected function isSingleStoreMode()
    {
        return $this->_storeManager->isSingleStoreMode();
    }

    /**
     * Getter for id of current store (the only one in single-store mode and current in multi-stores mode)
     *
     * @return bool
     * @SuppressWarnings(PHPMD.BooleanGetMethodName)
     */
    protected function getStoreId()
    {
        return $this->_storeManager->getStore(true)->getId();
    }

    /**
     * Getter for check is this newsletter the plain text.
     *
     * @return bool
     * @SuppressWarnings(PHPMD.BooleanGetMethodName)
     */
    public function getIsTextType()
    {
        return $this->getQueue()->isPlain();
    }

    /**
     * Getter for availability resume action
     *
     * @return bool
     * @SuppressWarnings(PHPMD.BooleanGetMethodName)
     */
    public function getCanResume()
    {
        return in_array($this->getQueue()->getQueueStatus(), [ModelQueue::STATUS_PAUSE]);
    }

    /**
     * Getter for header text
     *
     * @return bool
     * @SuppressWarnings(PHPMD.BooleanGetMethodName)
     */
    public function getHeaderText()
    {
        return $this->getIsPreview() ? __('View Newsletter') : __('Edit Newsletter');
    }
}