acf

plugins/system/nrframework/fields/treeselect.php

@@ -0,0 +1,165 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            https://www.tassos.gr
+ * @copyright       Copyright © 2024 Tassos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+use \NRFramework\HTML;
+
+defined('_JEXEC') or die;
+
+use Joomla\CMS\Form\FormField;
+use Joomla\CMS\Factory;
+
+abstract class JFormFieldNRTreeSelect extends FormField
+{
+	/**
+	 * Database object
+	 *
+	 * @var object
+	 */
+	public $db;
+
+	/**
+	 * Indicates whether the options array should be sorted before render.
+	 *
+	 * @var boolean
+	 */
+	protected $sortTree = false;
+	
+	/**
+	 * Indicates whether the options array should have the levels re-calculated
+	 * 
+	 * @var boolean
+	 */
+    protected $fixLevels = false;
+    
+    /**
+     * Increase the value(ID) of the category by one.
+	 * This happens because we have a parent category "Bussiness Directory" that pushes-in the indentation
+	 * and we reset it by decreasing the value, level and parent.
+     * 
+     * @var boolean
+     */
+    protected $increaseValue = false;
+
+	/**
+	 * Output the HTML for the field
+	 */
+	protected function getInput()
+	{
+		$this->db = Factory::getDbo();
+
+		$options = $this->getOptions();
+
+		if ($this->sortTree)
+		{
+			$options = $this->sortTreeSelectOptions($options);
+		}
+
+        if ($this->fixLevels)
+        {
+			$options = $this->fixLevels($options);
+        }
+        
+        if ($this->increaseValue)
+        {
+            // Increase by 1 the value(ID) of the category
+            foreach ($options as $key => $value)
+            {
+                $options[$key]->value+=1;
+            }
+        }
+
+		return HTML::treeselect($options, $this->name, $this->value, $this->id);
+	}
+
+	/**
+     *  Sorts treeselect options
+     * 
+     *  @param  array $options
+     *  @param  int   $parent_id
+     * 
+     *  @return array
+     */
+    protected function sortTreeSelectOptions($options, $parent_id = 0)
+    {
+        if (empty($options))
+        {
+            return [];
+        }
+
+        $result = [];
+
+        $sub_options = array_filter($options, function($option) use($parent_id)
+        {
+            return $option->parent == $parent_id;
+        });
+
+        foreach ($sub_options as $option)
+        {
+            $result[] = $option;
+            $result = array_merge($result, $this->sortTreeSelectOptions($options, $option->value));
+        }
+
+        return $result;
+	}
+	
+	/**
+     *  Fixes the levels of the categories
+     * 
+     *  @param  array $categories
+     * 
+     *  @return array
+     */
+    protected function fixLevels($cats)
+    {
+		// new categories
+		$categories = [];
+		
+        // get category levels
+        foreach ($cats as $c)
+        {
+            $level = 0;
+            $parent_id = (int)$c->parent;
+
+            while ($parent_id)
+            {
+                $level++;
+                $parent_id = $this->getNextParentId($cats, $parent_id);
+			}
+			
+            $c->level = $level;
+            $categories[] = $c;
+		}
+		
+		return $categories;
+	}
+
+    /**
+     *  Returns the next parent id
+     *  Helper method for getCategories
+     * 
+     *  @return int
+     */
+    protected function getNextParentId($categories, $current_pid)
+    {
+        foreach($categories as $c)
+        {
+            if ((int)$c->value === $current_pid)
+            {
+                return (int)$c->parent;
+            }
+        }
+    }
+
+	/**
+	 * Get tree options as an Array of objects
+	 * Each object should have the attributes: value, text, parent, level, disable
+	 *
+	 * @return object
+	 */
+	abstract protected function getOptions();
+}