add attention to store config

Author: ihormandzyuk

Block/Adminhtml/System/Config/Form/Attention.php

@@ -0,0 +1,34 @@
+<?php
+/**
+ * Copyright © Magefan ([email protected]). All rights reserved.
+ * Please visit Magefan.com for license details (https://magefan.com/end-user-license-agreement).
+ */
+
+namespace Magefan\GoogleTagManager\Block\Adminhtml\System\Config\Form;
+
+use Magento\Framework\Data\Form\Element\AbstractElement;
+
+/**
+ * Admin configurations information block
+ */
+class Attention extends \Magefan\Community\Block\Adminhtml\System\Config\Form\Info
+{
+
+    /**
+     * Return info block html
+     *
+     * @param  \Magento\Framework\Data\Form\Element\AbstractElement $element
+     * @return string
+     */
+    public function render(\Magento\Framework\Data\Form\Element\AbstractElement $element)
+    {
+        return '<div style="padding:10px;background-color:#ffe5e5;border:1px solid #ddd;margin-bottom:7px;">
+            <strong>Attention!</strong> Once you made and saved all the configurations,
+            please don\'t forget to scroll down to the "Export Container" section
+            and click the "Generate JSON Container & Download File" button to export container data.
+            After you save the file, <a target="_blank" title="Create GTM tags" href="https://magefan.com/blog/add-google-tag-manager-to-magento-2#5-create-gtm-tags">
+            import it to your Google Tag Manager container.</a>
+        </div>';
+    }
+}
+

etc/adminhtml/system.xml

@@ -18,6 +18,9 @@
                 <field id="version" translate="label comment" type="text" sortOrder="10" showInDefault="1" showInWebsite="1" showInStore="1">
                     <frontend_model>Magefan\GoogleTagManager\Block\Adminhtml\System\Config\Form\Info</frontend_model>
                 </field>
+                <field id="attention" translate="label comment" type="text" sortOrder="9999" showInDefault="1" showInWebsite="1" showInStore="1">
+                    <frontend_model>Magefan\GoogleTagManager\Block\Adminhtml\System\Config\Form\Attention</frontend_model>
+                </field>
                 <field id="enabled" translate="label comment" type="select" sortOrder="20" showInDefault="1" showInWebsite="1" showInStore="1">
                     <label>Enable Extension</label>
                     <source_model>Magento\Config\Model\Config\Source\Yesno</source_model>