Previous Next Navigation Feature

Block/Widget/Category.php

@@ -0,0 +1,187 @@
+<?php
+
+namespace Harriswebworks\CategoryWidget\Block\Widget;
+
+class Category extends \Magento\Framework\View\Element\Template implements \Magento\Widget\Block\BlockInterface
+{
+    protected $_template = 'widget/categorywidget.phtml';
+
+    const DEFAULT_IMAGE_WIDTH = 250;
+    const DEFAULT_IMAGE_HEIGHT = 250;
+
+    /**
+     * \Magento\Catalog\Model\CategoryFactory $categoryFactory
+     */
+    protected $_categoryFactory;
+    protected $_urlInterface;
+    protected $_registry;
+
+    /**
+     * @param \Magento\Framework\View\Element\Template\Context $context
+     * @param \Magento\Catalog\Model\CategoryFactory $categoryFactory
+     * @param array $data
+     */
+    public function __construct(
+        \Magento\Framework\View\Element\Template\Context $context,
+        \Magento\Catalog\Model\CategoryFactory $categoryFactory,
+        \Magento\Framework\Registry $registry
+    )
+    {
+        $this->_categoryFactory = $categoryFactory;
+        $this->_registry = $registry;
+
+        parent::__construct($context);
+    }
+
+    /**
+     * Retrieve current store categories
+     *
+     * @return \Magento\Framework\Data\Tree\Node\Collection|\Magento\Catalog\Model\Resource\Category\Collection|array
+     */
+    public function getCategoryCollection($categoryId = null)
+    {
+        $rootCatID = NULL;
+        if ($categoryId) {
+            $currentCategoryId = $this->getCurrentCategoryId();
+            $currentCategory = $this->getCategory($currentCategoryId);
+            $parentCategory = $currentCategory->getParentCategory();
+            if ($parentCategory) {
+                $rootCatID = $parentCategory->getId();
+            } else {
+                $rootCatID = $this->_storeManager->getStore()->getRootCategoryId();
+            }
+        } else {
+            if ($this->getData('parentcat') > 0) {
+                $rootCatID = $this->getData('parentcat');
+            } else {
+                $rootCatID = $this->getCurrentCategoryId();
+            }
+        }
+
+        $category = $this->getCategory($rootCatID);
+        if ($category) {
+            $childCategories = $category->getChildrenCategories();
+            if (is_object($childCategories)) {
+                $childCategories->addAttributeToSelect('image');
+            } else if (is_array($childCategories)) {
+                foreach ($childCategories as $key => $cc) {
+                    $childCategories[$key]->getResourceCollection()->addAttributeToSelect('image');
+                }
+            } else {
+                throw new \Exception('Could not process ' . gettype($childCategories));
+            }
+            return $childCategories;
+        }
+        return null;
+    }
+
+    /**
+     * Get the width of product image
+     * @return int
+     */
+    public function getImageWidth()
+    {
+        if ($this->getData('imagewidth') == '') {
+            return DEFAULT_IMAGE_WIDTH;
+        }
+        return (int)$this->getData('imagewidth');
+    }
+
+    /**
+     * Get the height of product image
+     * @return int
+     */
+    public function getImageHeight()
+    {
+        if ($this->getData('imageheight') == '') {
+            return DEFAULT_IMAGE_HEIGHT;
+        }
+        return (int)$this->getData('imageheight');
+    }
+
+    public function canShowImage()
+    {
+        if ($this->getData('image') == 'image')
+            return true;
+        elseif ($this->getData('image') == 'no-image')
+            return false;
+    }
+
+    public function getPreviousCategory()
+    {
+        $catId = $this->getPreviousCategoryId();
+        return $this->getCategory($catId);
+    }
+
+    public function getNextCategory()
+    {
+        $catId = $this->getNextCategoryId();
+        return $this->getCategory($catId);
+    }
+
+    private function getCategory($catId)
+    {
+        if ($catId) {
+            $category = $this->_categoryFactory->create();
+            $category->load($catId);
+
+            return $category;
+        }
+        return null;
+    }
+
+    private function getPreviousCategoryId()
+    {
+        return $this->prevnextCategory('previous');
+    }
+
+    private function getNextCategoryId()
+    {
+        return $this->prevnextCategory('next');
+    }
+
+    private function prevnextCategory($direction)
+    {
+        $currentCategoryId = $this->getCurrentCategoryId();
+        if ($currentCategoryId) {
+            $categories = $this->getCategoryCollection($currentCategoryId);
+            $categoriesIds = [];
+            if (is_object($categories)) {
+                $categoriesIds = $categories->getAllIds();
+            } else if (is_array($categories)) {
+                $categoriesIds = array_keys($categories);
+            } else {
+                throw new \Exception('Could not process ' . gettype($categories));
+            }
+            $countCategories = count($categoriesIds);
+            if ($currentCategoryId && !empty($categoriesIds)) {
+                $currentIndex = array_search($currentCategoryId, $categoriesIds);
+                if (!is_null($currentIndex)) {
+                    if ($direction === 'previous') {
+                        $targetIndex = --$currentIndex;
+                        if ($targetIndex < 0) {
+                            $targetIndex = $countCategories - 1;//loop
+                        }
+                    } elseif ($direction === 'next') {
+                        $targetIndex = ++$currentIndex;
+                        if ($targetIndex >= $countCategories) {
+                            $targetIndex = 0;//loop
+                        }
+                    }
+                    return $categoriesIds[$targetIndex];
+                }
+            }
+        }
+
+        return null;
+    }
+
+    private function getCurrentCategoryId()
+    {
+        $category = $this->_registry->registry('current_category');
+        if ($category) {
+            return $category->getId();
+        }
+        return 0;
+    }
+}

Block/Widget/CategoryWidget.php

@@ -1,77 +1,7 @@
 <?php
-namespace Emizentech\CategoryWidget\Block\Widget;
+namespace Harriswebworks\CategoryWidget\Block\Widget;
 
-class CategoryWidget extends \Magento\Framework\View\Element\Template implements \Magento\Widget\Block\BlockInterface
+class CategoryWidget extends Category
 {
     protected $_template = 'widget/categorywidget.phtml';
-
-    const DEFAULT_IMAGE_WIDTH = 250;
-    const DEFAULT_IMAGE_HEIGHT = 250;
-
-    /**
-    * \Magento\Catalog\Model\CategoryFactory $categoryFactory
-    */
-    protected $_categoryFactory;
-
-    /**
-    * @param \Magento\Framework\View\Element\Template\Context $context
-    * @param \Magento\Catalog\Model\CategoryFactory $categoryFactory
-    * @param array $data
-    */
-    public function __construct(
-    \Magento\Framework\View\Element\Template\Context $context,
-    \Magento\Catalog\Model\CategoryFactory $categoryFactory
-    ) {
-        $this->_categoryFactory = $categoryFactory;
-        parent::__construct($context);
-    }
-
-    /**
-    * Retrieve current store categories
-    *
-    * @return \Magento\Framework\Data\Tree\Node\Collection|\Magento\Catalog\Model\Resource\Category\Collection|array
-    */
-    public function getCategoryCollection()
-    {
-        $category = $this->_categoryFactory->create();
-
-        $rootCatID = NULL;
-        if($this->getData('parentcat') > 0)
-            $rootCatID = $this->getData('parentcat'); 
-        else
-            $rootCatID = $this->_storeManager->getStore()->getRootCategoryId();
-
-        $category->load($rootCatID);
-        $childCategories = $category->getChildrenCategories()->addAttributeToSelect('image');
-        return $childCategories;
-    }
-
-    /**
-    * Get the width of product image
-    * @return int
-    */
-    public function getImageWidth() {
-        if($this->getData('imagewidth')==''){
-            return DEFAULT_IMAGE_WIDTH;
-        }
-        return (int) $this->getData('imagewidth');
-    }
-
-    /**
-    * Get the height of product image
-    * @return int
-    */
-    public function getImageHeight() {
-        if($this->getData('imageheight')==''){
-            return DEFAULT_IMAGE_HEIGHT;
-        }
-        return (int) $this->getData('imageheight');
-    }
-
-    public function canShowImage(){
-        if($this->getData('image') == 'image')
-            return true;
-        elseif($this->getData('image') == 'no-image')
-            return false;
-    }
-}
+}

Block/Widget/NextCategoryWidget.php

@@ -0,0 +1,7 @@
+<?php
+namespace Harriswebworks\CategoryWidget\Block\Widget;
+
+class NextCategoryWidget extends Category
+{
+    protected $_template = 'widget/nextcategorywidget.phtml';
+}

Block/Widget/PreviousCategoryWidget.php

@@ -0,0 +1,7 @@
+<?php
+namespace Harriswebworks\CategoryWidget\Block\Widget;
+
+class PreviousCategoryWidget extends Category
+{
+    protected $_template = 'widget/previouscategorywidget.phtml';
+}

LICENSE.txt

@@ -0,0 +1,48 @@
+
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+
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