TASK: Add a category filter

Classes/JohannesSteu/Neos/News/Eel/FlowQueryOperations/FilterByCategoryOperation.php

@@ -0,0 +1,78 @@
+<?php
+namespace JohannesSteu\Neos\News\Eel\FlowQueryOperations;
+
+/*                                                                        *
+ * This script belongs to the Flow package "JohannesSteu.Neos.News".      *
+ *                                                                        */
+
+use TYPO3\Eel\FlowQuery\Operations\AbstractOperation;
+use TYPO3\Eel\FlowQuery\FlowQuery;
+use TYPO3\Flow\Annotations as Flow;
+use TYPO3\TYPO3CR\Domain\Model\NodeInterface;
+
+/**
+ * EEL operation to filter nodes by a given category.
+ */
+class FilterByCategoryOperation extends AbstractOperation
+{
+	/**
+	 * {@inheritdoc}
+	 *
+	 * @var string
+	 */
+	protected static $shortName = 'filterByCategory';
+
+	/**
+	 * {@inheritdoc}
+	 *
+	 * @var integer
+	 */
+	protected static $priority = 100;
+
+	/**
+	 * {@inheritdoc}
+	 *
+	 * We can only handle TYPO3CR Nodes.
+	 *
+	 * @param mixed $context
+	 * @return boolean
+	 */
+	public function canEvaluate($context)
+	{
+		return (isset($context[0]) && ($context[0] instanceof NodeInterface));
+	}
+
+	/**
+	 * {@inheritdoc}
+	 *
+	 * @param FlowQuery $flowQuery the FlowQuery object
+	 * @param array $arguments First argument is the property to filter for, second is the category to filter for
+	 * @return mixed
+	 */
+	public function evaluate(FlowQuery $flowQuery, array $arguments)
+	{
+		if (!isset($arguments[0]) || empty($arguments[0])) {
+			throw new \TYPO3\Eel\FlowQuery\FlowQueryException('needs a category to filter for', 1332492263);
+		} else {
+			$nodesWithCategorySet = [];
+
+			$categoryNode = $arguments[0];
+			$nodes = $flowQuery->getContext();
+
+			foreach($nodes as $node) {
+				/** @var $node NodeInterface */
+				$nodeCategories = $node->getProperty("categories");
+				foreach ($nodeCategories as $nodeCategory) {
+					/** @var $nodeCategory Node */
+					if ($nodeCategory->getNodeData()->getProperty("uriPathSegment") == $categoryNode) {
+						$nodesWithCategorySet[] = $node;
+					}
+				}
+
+			}
+
+			$flowQuery->setContext($nodesWithCategorySet);
+		}
+	}
+
+}

Resources/Private/Templates/NodeTypes/NewsFilter.html

@@ -2,6 +2,9 @@
 {namespace ts=TYPO3\TypoScript\ViewHelpers}
 
 <f:section name="newsFilter">
+    <f:if condition="{categoryFilter}">
+        <ts:render path="categoryFilterTemplate" context="{categoryFilter:categoryFilter}" />
+    </f:if>
     <f:if condition="{dateFilter}">
         <ts:render path="dateFilterTemplate" context="{dateFilter:dateFilter}" />
     </f:if>
@@ -22,4 +25,17 @@
             </li>
         </f:for>
     </ul>
-</f:section>
+</f:section>
+
+
+<f:section name="categoryFilter">
+    <ul class="news-categoryfilter">
+        <li class="headline">Themen / Kategorien</li>
+        <li><neos:link.node node="{node}"><span class="news-categoryfilter__category">Alle</span></neos:link.node></li>
+        <f:for each="{categoryFilter}" as="filter">
+            <li>
+                <neos:link.node node="{node}" arguments="{category: '{filter.properties.uriPathSegment}'}"><span class="news-categoryfilter__category">{filter.properties.title}</span></neos:link.node>
+            </li>
+        </f:for>
+    </ul>
+</f:section>

Resources/Private/TypoScript/NodeTypes/NewsFilter.ts2

@@ -38,4 +38,13 @@ prototype(JohannesSteu.Neos.News:NewsFilter) < prototype(TYPO3.Neos:Content) {
 
         dateFilter = ${dateFilter}
     }
+
+    categoryFilter = ${q(site).find('[instanceof JohannesSteu.Neos.News:Category]').get()}
+
+    categoryFilterTemplate = TYPO3.TypoScript:Template {
+        templatePath = 'resource://JohannesSteu.Neos.News/Private/Templates/NodeTypes/NewsFilter.html'
+        sectionName = 'categoryFilter'
+
+        categoryFilter = ${categoryFilter}
+    }
 }

Resources/Private/TypoScript/NodeTypes/NewsList.ts2

@@ -35,7 +35,9 @@ prototype(JohannesSteu.Neos.News:NewsList) < prototype(Flowpack.Listable:ListNod
         [email protected] = ${q(value).count() > 0 && q(value).removeImportantNews(respectImportant).get()}
 
         # apply newsfilter if set
+        [email protected] = ${request.arguments.category != NULL ? q(value).filterByCategory(request.arguments.category).get() : value}
         [email protected] = ${request.arguments.newsfilter-date != NULL ? q(value).filterByDateintervall('publishDate',request.arguments.newsfilter-date, '>').get() : value}
+
     }
 }
 
@@ -54,8 +56,12 @@ prototype(TYPO3.Neos:ContentCollection)[email protected] = ${re
 prototype(Flowpack.Listable:ListNode)[email protected] = ${request.pluginArguments.listable-paginate.currentPage}
 
 
-# Adjust cachces for newsfilter
+# Adjust caches for newsfilter
 [email protected] = ${request.arguments.newsfilter-date}
 prototype(TYPO3.Neos:Page)[email protected] = ${request.arguments.newsfilter-date}
 prototype(TYPO3.Neos:ContentCollection)[email protected] = ${request.arguments.newsfilter-date}
-prototype(Flowpack.Listable:ListNode)[email protected] = ${request.arguments.newsfilter-date}
+prototype(Flowpack.Listable:ListNode)[email protected] = ${request.arguments.newsfilter-date}
+[email protected] = ${request.arguments.category}
+prototype(TYPO3.Neos:Page)[email protected] = ${request.arguments.category}
+prototype(TYPO3.Neos:ContentCollection)[email protected] = ${request.arguments.category}
+prototype(Flowpack.Listable:ListNode)[email protected] = ${request.arguments.category}