Contact form > Adding ViewModel

app/code/Magento/Contact/ViewModel/UserDataProvider.php

@@ -0,0 +1,72 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+namespace Magento\Contact\ViewModel;
+
+use Magento\Contact\Helper\Data;
+use Magento\Framework\View\Element\Block\ArgumentInterface;
+
+/**
+ * Provides the user data to fill the form.
+ */
+class UserDataProvider implements ArgumentInterface
+{
+
+    /**
+     * @var Data
+     */
+    private $helper;
+
+    /**
+     * UserDataProvider constructor.
+     * @param Data $helper
+     */
+    public function __construct(
+        Data $helper
+    ) {
+        $this->helper = $helper;
+    }
+
+    /**
+     * Get user name
+     *
+     * @return string
+     */
+    public function getUserName()
+    {
+        return $this->helper->getPostValue('name') ?: $this->helper->getUserName();
+    }
+
+    /**
+     * Get user email
+     *
+     * @return string
+     */
+    public function getUserEmail()
+    {
+        return $this->helper->getPostValue('email') ?: $this->helper->getUserEmail();
+    }
+
+    /**
+     * Get user telephone
+     *
+     * @return string
+     */
+    public function getUserTelephone()
+    {
+        return $this->helper->getPostValue('telephone');
+    }
+
+    /**
+     * Get user comment
+     *
+     * @return string
+     */
+    public function getUserComment()
+    {
+        return $this->helper->getPostValue('comment');
+    }
+}

app/code/Magento/Contact/view/frontend/layout/contact_index_index.xml

@@ -13,6 +13,9 @@
         <referenceContainer name="content">
             <block class="Magento\Contact\Block\ContactForm" name="contactForm" template="Magento_Contact::form.phtml">
                 <container name="form.additional.info" label="Form Additional Info"/>
+                <arguments>
+                    <argument name="view_model" xsi:type="object">Magento\Contact\ViewModel\UserDataProvider</argument>
+                </arguments>
             </block>
         </referenceContainer>
     </body>

app/code/Magento/Contact/view/frontend/templates/form.phtml

@@ -5,6 +5,9 @@
  */
 
 /** @var \Magento\Contact\Block\ContactForm $block */
+/** @var \Magento\Contact\ViewModel\UserDataProvider $viewModel */
+
+$viewModel = $block->getViewModel();
 ?>
 <form class="form contact"
       action="<?= $block->escapeUrl($block->getFormAction()) ?>"
@@ -18,25 +21,25 @@
         <div class="field name required">
             <label class="label" for="name"><span><?= $block->escapeHtml(__('Name')) ?></span></label>
             <div class="control">
-                <input name="name" id="name" title="<?= $block->escapeHtmlAttr(__('Name')) ?>" value="<?= $block->escapeHtmlAttr($this->helper(\Magento\Contact\Helper\Data::class)->getPostValue('name') ?: $this->helper(\Magento\Contact\Helper\Data::class)->getUserName()) ?>" class="input-text" type="text" data-validate="{required:true}"/>
+                <input name="name" id="name" title="<?= $block->escapeHtmlAttr(__('Name')) ?>" value="<?= $block->escapeHtmlAttr($viewModel->getUserName()) ?>" class="input-text" type="text" data-validate="{required:true}"/>
             </div>
         </div>
         <div class="field email required">
             <label class="label" for="email"><span><?= $block->escapeHtml(__('Email')) ?></span></label>
             <div class="control">
-                <input name="email" id="email" title="<?= $block->escapeHtmlAttr(__('Email')) ?>" value="<?= $block->escapeHtmlAttr($this->helper(\Magento\Contact\Helper\Data::class)->getPostValue('email') ?: $this->helper(\Magento\Contact\Helper\Data::class)->getUserEmail()) ?>" class="input-text" type="email" data-validate="{required:true, 'validate-email':true}"/>
+                <input name="email" id="email" title="<?= $block->escapeHtmlAttr(__('Email')) ?>" value="<?= $block->escapeHtmlAttr($viewModel->getUserEmail()) ?>" class="input-text" type="email" data-validate="{required:true, 'validate-email':true}"/>
             </div>
         </div>
         <div class="field telephone">
             <label class="label" for="telephone"><span><?= $block->escapeHtml(__('Phone Number')) ?></span></label>
             <div class="control">
-                <input name="telephone" id="telephone" title="<?= $block->escapeHtmlAttr(__('Phone Number')) ?>" value="<?= $block->escapeHtmlAttr($this->helper(\Magento\Contact\Helper\Data::class)->getPostValue('telephone')) ?>" class="input-text" type="text" />
+                <input name="telephone" id="telephone" title="<?= $block->escapeHtmlAttr(__('Phone Number')) ?>" value="<?= $block->escapeHtmlAttr($viewModel->getUserTelephone()) ?>" class="input-text" type="text" />
             </div>
         </div>
         <div class="field comment required">
             <label class="label" for="comment"><span><?= $block->escapeHtml(__('What’s on your mind?')) ?></span></label>
             <div class="control">
-                <textarea name="comment" id="comment" title="<?= $block->escapeHtmlAttr(__('What’s on your mind?')) ?>" class="input-text" cols="5" rows="3" data-validate="{required:true}"><?= $block->escapeHtml($this->helper(\Magento\Contact\Helper\Data::class)->getPostValue('comment')) ?></textarea>
+                <textarea name="comment" id="comment" title="<?= $block->escapeHtmlAttr(__('What’s on your mind?')) ?>" class="input-text" cols="5" rows="3" data-validate="{required:true}"><?= $block->escapeHtml($viewModel->getUserComment()) ?></textarea>
             </div>
         </div>
         <?= $block->getChildHtml('form.additional.info') ?>