Merged PR 38244: Code cleanup for coding standards

## What's being changed

We've audited the entire module to bring it into line with the latest Magento coding standards. We've also inlined var declarations, made dotblock updates and adopted use statements.

## Why it's being changed

Cleaning up code for a green build on Chat module.

## How to test
1. Enable Chat in Configuration -> Chat
2. Visit home page
3. Wait for chat to load and send message.
4. Log into DD and insure message, profile etc .. are working as expected.
5. Visit Chat studio page from Magento Admin, ensure page is displayed.

Related work items: #178895, #178896, #178897

Block/Adminhtml/Config/Settings/ButtonField.php

@@ -5,9 +5,13 @@
 use Dotdigitalgroup\Chat\Model\Config;
 use Dotdigitalgroup\Email\Helper\Data;
 use Dotdigitalgroup\Email\Helper\OauthValidator;
+use Magento\Backend\Block\Template\Context;
 use Magento\Backend\Block\Widget\Button;
+use Magento\Config\Block\System\Config\Form\Field;
+use Magento\Framework\Data\Form\Element\AbstractElement;
+use Magento\Framework\Exception\LocalizedException;
 
-abstract class ButtonField extends \Magento\Config\Block\System\Config\Form\Field
+abstract class ButtonField extends Field
 {
     /**
      * @var Config
@@ -26,14 +30,15 @@ abstract class ButtonField extends \Magento\Config\Block\System\Config\Form\Fiel
 
     /**
      * ButtonField constructor.
-     * @param \Magento\Backend\Block\Template\Context $context
+     *
+     * @param Context $context
      * @param Config $config
      * @param Data $helper
      * @param OauthValidator $oauthValidator
      * @param array $data
      */
     public function __construct(
-        \Magento\Backend\Block\Template\Context $context,
+        Context $context,
         Config $config,
         Data $helper,
         OauthValidator $oauthValidator,
@@ -47,6 +52,7 @@ public function __construct(
 
     /**
      * Returns the class name based on API Creds validation
+     *
      * @return string
      */
     public function getCssClass()
@@ -58,20 +64,25 @@ public function getCssClass()
     }
 
     /**
+     * Get Button url
+     *
      * @return string
      */
     abstract protected function getButtonUrl();
 
     /**
-     * @param \Magento\Framework\Data\Form\Element\AbstractElement $element
+     * Get HTML element
+     *
+     * @param AbstractElement $element
      * @return string
-     * @throws \Magento\Framework\Exception\LocalizedException
+     * @throws LocalizedException
      */
-    public function _getElementHtml(\Magento\Framework\Data\Form\Element\AbstractElement $element)
+    public function _getElementHtml(AbstractElement $element)
     {
-        return $this->getLayout()
-            ->createBlock(Button::class)
-            ->setType('button')
+
+         $block = $this->getLayout()->createBlock(Button::class);
+         /** @var \Magento\Framework\View\Element\AbstractBlock $block */
+         return $block->setType('button')
             ->setLabel(__('Configure'))
             ->setOnClick(sprintf("window.open('%s','_blank')", $this->getButtonUrl()))
             ->setData('class', $this->getCssClass())
@@ -80,17 +91,20 @@ public function _getElementHtml(\Magento\Framework\Data\Form\Element\AbstractEle
 
     /**
      * Removes use Default Checkbox
-     * @param \Magento\Framework\Data\Form\Element\AbstractElement $element
+     *
+     * @param AbstractElement $element
      * @return string
      */
-    public function render(\Magento\Framework\Data\Form\Element\AbstractElement $element)
+    public function render(AbstractElement $element)
     {
         $element->unsScope()->unsCanUseWebsiteValue()->unsCanUseDefaultValue();
         return parent::render($element);
     }
 
     /**
-     * @param $url
+     * Get Dotdigital authorised url
+     *
+     * @param string $url
      * @return string
      */
     protected function getEcAuthorisedUrl($url)

Block/Adminhtml/Config/Settings/ConfigureTeamsButton.php

@@ -6,6 +6,7 @@ class ConfigureTeamsButton extends ButtonField
 {
     /**
      * Returns the URL to Configure Chat Teams
+     *
      * @return string
      */
     protected function getButtonUrl()

Block/Adminhtml/Config/Settings/ConfigureWidgetButton.php

@@ -6,6 +6,7 @@ class ConfigureWidgetButton extends ButtonField
 {
     /**
      * Returns the Url to Configure Chat Widget
+     *
      * @return string
      */
     protected function getButtonUrl()

Block/Adminhtml/StudioChat.php

@@ -42,6 +42,7 @@ class StudioChat extends \Magento\Backend\Block\Template implements EngagementCl
 
     /**
      * StudioChat constructor.
+     *
      * @param Context $context
      * @param IntegrationSetupFactory $integrationSetupFactory
      * @param Data $helper
@@ -64,6 +65,8 @@ public function __construct(
     }
 
     /**
+     * Get action url for chat
+     *
      * @return string
      * @throws \Magento\Framework\Exception\LocalizedException
      */

Controller/Adminhtml/Studio/Index.php

@@ -5,15 +5,22 @@
 use Dotdigitalgroup\Chat\Model\Config;
 use Dotdigitalgroup\Email\Helper\Data;
 use Magento\Backend\App\Action;
+use Magento\Framework\Exception\LocalizedException;
+use Magento\Framework\View\Result\PageFactory;
 
-class Index extends \Magento\Backend\App\AbstractAction
+class Index extends Action
 {
     /**
      * Authorization level of a basic admin session
      *
      * @see _isAllowed()
      */
-    const ADMIN_RESOURCE = 'Dotdigitalgroup_Chat::config';
+    public const ADMIN_RESOURCE = 'Dotdigitalgroup_Chat::config';
+
+    /**
+     * @var PageFactory
+     */
+    protected $resultPageFactory;
 
     /**
      * @var Data
@@ -27,30 +34,42 @@ class Index extends \Magento\Backend\App\AbstractAction
 
     /**
      * Index constructor.
+     *
      * @param Action\Context $context
+     * @param PageFactory $resultPageFactory
      * @param Data $helper
      * @param Config $config
      */
     public function __construct(
         Action\Context $context,
+        PageFactory $resultPageFactory,
         Data $helper,
         Config $config
     ) {
+        $this->resultPageFactory = $resultPageFactory;
         $this->helper = $helper;
         $this->config = $config;
         parent::__construct($context);
     }
 
     /**
      * Execute method.
+     *
+     * @return \Magento\Framework\Controller\Result\Redirect|\Magento\Framework\View\Result\Page
+     * @throws LocalizedException
      */
     public function execute()
     {
         if ($this->helper->isEnabled() && !$this->config->isChatEnabled()) {
-            return $this->_redirect('adminhtml/system_config/edit/section/chat_api_credentials');
+            return $this->resultRedirectFactory
+                ->create()
+                ->setPath('adminhtml/system_config/edit/section/chat_api_credentials');
         }
-
-        $this->_view->loadLayout();
-        $this->_view->renderLayout();
+        $resultPage = $this->resultPageFactory->create();
+        $resultPage
+            ->getConfig()
+            ->getTitle()
+            ->prepend(__('Chat Studio'));
+        return $resultPage;
     }
 }

Controller/Adminhtml/Studio/Team.php

@@ -3,41 +3,49 @@
 namespace Dotdigitalgroup\Chat\Controller\Adminhtml\Studio;
 
 use Magento\Backend\App\Action;
-use Dotdigitalgroup\Chat\Model\Config;
+use Magento\Framework\View\Result\Page;
+use Magento\Framework\View\Result\PageFactory;
 
-class Team extends \Magento\Backend\App\AbstractAction
+class Team extends Action
 {
     /**
      * Authorization level of a basic admin session
      *
      * @see _isAllowed()
      */
-    const ADMIN_RESOURCE = 'Dotdigitalgroup_Email::iframe';
+    public const ADMIN_RESOURCE = 'Dotdigitalgroup_Email::iframe';
 
     /**
-     * @var Config
+     * @var PageFactory
      */
-    private $config;
+    protected $resultPageFactory;
 
     /**
      * Index constructor.
+     *
      * @param Action\Context $context
-     * @param Config $config
+     * @param PageFactory $resultPageFactory
      */
     public function __construct(
         Action\Context $context,
-        Config $config
+        PageFactory $resultPageFactory
     ) {
-        $this->config = $config;
+        $this->resultPageFactory = $resultPageFactory;
         parent::__construct($context);
     }
 
     /**
      * Execute method.
+     *
+     * @return Page
      */
     public function execute()
     {
-        $this->_view->loadLayout();
-        $this->_view->renderLayout();
+        $resultPage = $this->resultPageFactory->create();
+        $resultPage
+            ->getConfig()
+            ->getTitle()
+            ->prepend(__('Chat Team / Widget'));
+        return $resultPage;
     }
 }

Controller/Adminhtml/Studio/Widget.php

@@ -3,41 +3,49 @@
 namespace Dotdigitalgroup\Chat\Controller\Adminhtml\Studio;
 
 use Magento\Backend\App\Action;
-use Dotdigitalgroup\Chat\Model\Config;
+use Magento\Framework\View\Result\Page;
+use Magento\Framework\View\Result\PageFactory;
 
-class Widget extends \Magento\Backend\App\AbstractAction
+class Widget extends Action
 {
     /**
      * Authorization level of a basic admin session
      *
      * @see _isAllowed()
      */
-    const ADMIN_RESOURCE = 'Dotdigitalgroup_Email::iframe';
+    public const ADMIN_RESOURCE = 'Dotdigitalgroup_Email::iframe';
 
     /**
-     * @var Config
+     * @var PageFactory
      */
-    private $config;
+    protected $resultPageFactory;
 
     /**
      * Index constructor.
+     *
      * @param Action\Context $context
-     * @param Config $config
+     * @param PageFactory $resultPageFactory
      */
     public function __construct(
         Action\Context $context,
-        Config $config
+        PageFactory $resultPageFactory
     ) {
-        $this->config = $config;
+        $this->resultPageFactory = $resultPageFactory;
         parent::__construct($context);
     }
 
     /**
      * Execute method.
+     *
+     * @return Page
      */
     public function execute()
     {
-        $this->_view->loadLayout();
-        $this->_view->renderLayout();
+        $resultPage = $this->resultPageFactory->create();
+        $resultPage
+            ->getConfig()
+            ->getTitle()
+            ->prepend(__('Chat Studio / Widget'));
+        return $resultPage;
     }
 }

Controller/Profile/Index.php

@@ -18,7 +18,7 @@ class Index extends Action
      * Profile constructor
      *
      * @param Context $context
-     * @param $chatProfile
+     * @param UpdateChatProfile $chatProfile
      */
     public function __construct(
         Context $context,
@@ -36,9 +36,10 @@ public function __construct(
     public function execute()
     {
         $this->chatProfile->update($this->getRequest()->getParam('profileId'));
-
-        return $this->getResponse()
-            ->setHttpResponseCode(204)
-            ->sendHeaders();
+        /** @var \Magento\Framework\HTTP\PhpEnvironment\Response $response */
+        $response = $this->getResponse();
+        $response->setHttpResponseCode(204);
+        $response->sendHeaders();
+        return $response;
     }
 }

CustomerData/Chat.php

@@ -10,6 +10,7 @@
 use Magento\Store\Model\StoreManagerInterface;
 use Magento\Framework\UrlInterface;
 use Dotdigitalgroup\Email\Helper\Data;
+use Magento\TestFramework\Event\Magento;
 
 class Chat implements SectionSourceInterface
 {

Model/Api/LiveChatApiClient.php

@@ -10,7 +10,6 @@
 
 class LiveChatApiClient
 {
-
     /**
      * Chat config
      *
@@ -21,7 +20,7 @@ class LiveChatApiClient
     /**
      * Zend HTTP Client
      *
-     * @var HttpClientFactory
+     * @var ClientFactory
      */
     private $httpClientFactory;