controllers/EditTag.php

@@ -105,6 +105,17 @@ class EditTag extends HTMLController
 		$formview = new FormView($form, $form_title ?? '');
 		$this->page->adopt($formview);
 
+		if (!empty($id_tag))
+		{
+			list($assets, $num_assets) = AssetIterator::getByOptions([
+				'direction' => 'desc',
+				'limit' => 500,
+				'id_tag' => $id_tag,
+			], true);
+
+			$this->page->adopt(new FeaturedThumbnailManager($assets, $id_tag ? $tag->id_asset_thumb : 0));
+		}
+
 		if (!empty($_POST))
 		{
 			$form->verify($_POST);

public/css/default.css

@@ -355,6 +355,36 @@ i.space-invader.alt-7::before {
 }
 
 
+/* Featured thumbnail selection
+---------------------------------*/
+#featuredThumbnail {
+	list-style: none;
+	margin: 2.5% 0 0;
+	padding: 0;
+	clear: both;
+	overflow: auto;
+}
+#featuredThumbnail li {
+	float: left;
+	width: 18%;
+	line-height: 0;
+	margin: 0 1% 2%;
+	min-width: 200px;
+	height: 149px;
+	position: relative;
+}
+#featuredThumbnail input {
+	position: absolute;
+	top: 0.5rem;
+	right: 0.5rem;
+	z-index: 100;
+}
+#featuredThumbnail img {
+	width: 100%;
+	box-shadow: 3px 3px 3px rgba(0, 0, 0, 0.2);
+}
+
+
 /* Footer
 -----------*/
 footer {

templates/FeaturedThumbnailManager.php

@@ -0,0 +1,42 @@
+<?php
+/*****************************************************************************
+ * FeaturedThumbnailManager.php
+ * Contains the featured thumbnail manager template.
+ *
+ * Kabuki CMS (C) 2013-2021, Aaron van Geffen
+ *****************************************************************************/
+
+class FeaturedThumbnailManager extends SubTemplate
+{
+	private $assets;
+	private $currentThumbnailId;
+
+	public function __construct(AssetIterator $assets, $currentThumbnailId)
+	{
+		$this->assets = $assets;
+		$this->currentThumbnailId = $currentThumbnailId;
+	}
+
+	protected function html_content()
+	{
+		echo '
+			<h2>Select thumbnail</h2>
+			<ul id="featuredThumbnail">';
+
+		while ($asset = $this->assets->next())
+		{
+			$image = $asset->getImage();
+			echo '
+				<li>
+					<input class="form-check-input" type="radio" name="featuredThumbnail" value="', $image->getId(), '"',
+					$this->currentThumbnailId == $image->getId() ? ' checked' : '', '>
+					<img src="', $image->getThumbnailUrl(150, 100, 'top'), '" alt="" title="', $image->getTitle(), '" onclick="this.parentNode.children[0].checked = true">
+				</li>';
+		}
+
+		$this->assets->clean();
+
+		echo '
+				</ul>';
+	}
+}