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plugins/system/nrframework/NRFramework/Helpers/ChainedFields.php

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+<?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
+ */
+
+namespace NRFramework\Helpers;
+
+defined('_JEXEC') or die;
+
+class ChainedFields
+{
+	/**
+	 * Loads a combined array of the inputs and choices of the CSV file.
+	 * 
+	 * @param   string  $path
+	 * @param   string  $data_source
+	 * @param   string  $separator
+	 * @param   string  $id_prefix
+	 * @param   string  $name_prefix
+	 * 
+	 * @return  array
+	 */
+	public static function loadCSV($input, $data_source = 'custom', $separator = ',', $id_prefix = '', $name_prefix = '')
+	{
+		if (!$separator)
+		{
+			return [];
+		}
+
+		if ($data_source === 'csv_file')
+		{
+			if (!file_exists($input))
+			{
+				return [];
+			}
+	
+			if (!$input = file_get_contents($input))
+			{
+				return [];
+			}
+		}
+
+		if (!$data = self::getData($input, $separator, $id_prefix, $name_prefix))
+		{
+			return [];
+		}
+
+		return $data;
+	}
+
+	/**
+	 * Iterates over the given data and returns the inputs and choices.
+	 * 
+	 * @param   string  $data
+	 * @param   string  $separator
+	 * @param   string  $id_prefix
+	 * @param   string  $name_prefix
+	 * 
+	 * @return  array
+	 */
+	public static function getData($data = '', $separator = ',', $id_prefix = '', $name_prefix = '')
+	{
+		if (!$data || !is_string($data))
+		{
+			return;
+		}
+		
+		if (!$rows = explode(PHP_EOL, $data))
+		{
+			return;
+		}
+
+		$choices = [];
+		$inputs = [];
+
+		foreach ($rows as $row)
+		{
+			$row = explode($separator, $row);
+
+			$row = array_filter($row, 'strlen');
+
+			// if an empty row was found, skip it
+			if (empty($row))
+			{
+				continue;
+			}
+
+			if (empty($inputs))
+			{
+				$i = 1;
+				
+				foreach ($row as $index => $item)
+				{
+					if ($i % 10 == 0)
+					{
+						$i++;
+					}
+
+					$inputs[] = [
+						'id'    => $id_prefix . $i,
+						'name'  => $name_prefix . '[' . $i . ']',
+						'label' => trim($item),
+					];
+
+					$i++;
+				}
+
+				continue;
+			}
+
+			$parent = null;
+
+			foreach($row as $item)
+			{
+				$item = trim($item);
+				
+				if ($parent === null)
+				{
+					$parent = &$choices;
+				}
+
+				if (!isset($parent[$item]))
+				{
+					$item = trim($item);
+
+					$parent[$item] = [
+						'text'       => $item,
+						'value'      => $item,
+						'isSelected' => false,
+						'choices'    => []
+					];
+				}
+
+				$parent = &$parent[$item]['choices'];
+			}
+		}
+
+		self::array_values_recursive($choices);
+
+		if (!isset($inputs) || !isset($choices))
+		{
+			return;
+		}
+
+		return compact('inputs', 'choices');
+	}
+
+	/**
+	 * Transforms an array to using as key an index value instead of a alphanumeric.
+	 * 
+	 * @param   array   $choices
+	 * @param   string  $property
+	 * 
+	 * @return  array
+	 */
+	public static function array_values_recursive(&$choices, $property = 'choices')
+	{
+		$choices = array_values($choices);
+
+		for($i = 0; $i <= count($choices); $i++)
+		{
+			if(empty($choices[$i][$property]))
+			{
+				continue;
+			}
+
+			$choices[$i][$property] = self::array_values_recursive($choices[$i][$property], $property);
+        }
+
+		return $choices;
+	}
+}