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/home/zrcdevco/public_html/zrcprod/plugins/fields/articles/helper.php

<?php
/**
 * @package         Articles Field
 * @version         3.0.0PRO
 * 
 * @author          Peter van Westen <info@regularlabs.com>
 * @link            http://www.regularlabs.com
 * @copyright       Copyright © 2019 Regular Labs All Rights Reserved
 * @license         http://www.gnu.org/licenses/gpl-2.0.html GNU/GPL
 */

defined('_JEXEC') or die;

use Joomla\CMS\Factory as JFactory;
use Joomla\CMS\Plugin\PluginHelper as JPluginHelper;
use Joomla\CMS\Router\Route as JRoute;
use RegularLabs\Library\Article as RL_Article;
use RegularLabs\Library\DB as RL_DB;
use RegularLabs\Library\RegEx as RL_RegEx;

if (is_file(JPATH_LIBRARIES . '/regularlabs/autoload.php'))
{
	require_once JPATH_LIBRARIES . '/regularlabs/autoload.php';
}

class PlgFieldsArticlesHelper
{
	public static function renderLayout($ids, $layout, $field, $layout_type = 'title', $apply_ordering = true)
	{
		$settings = (object) [];
		switch ($layout_type)
		{
			case 'custom_html':
				$settings->custom_html = $field->fieldparams->get('custom_html', '');
				break;
			case 'title_custom':
				$settings->custom_field = $field->fieldparams->get('custom_field', '');
				$settings->link_title   = $field->fieldparams->get('link_title', 1);
				break;
			case 'title':
			default:
				$settings->link_title = $field->fieldparams->get('link_title', 1);
				break;
		}

$outputs   = self::getOutputs($ids, $layout, $field, $settings, $apply_ordering);
		$separator = $field->fieldparams->get('use_separator') ? $field->fieldparams->get('separator', ', ') : '';

echo implode($separator, $outputs);
	}

private static function getOutputs($ids, $layout, $field, $settings, $apply_ordering)
	{
		$ids = array_unique($ids);

if ($apply_ordering)
		{
			return self::getOrderedOutputs($ids, $layout, $field, $settings);
		}

return self::getUnOrderedOutputs($ids, $layout, $field, $settings);
	}

private static function getUnOrderedOutputs($ids, $layout, $field, $settings)
	{
		$outputs = [];

foreach ($ids as $id)
		{
			if ( ! $id)
			{
				continue;
			}

$article = RL_Article::get($id);

if (empty($article->id))
			{
				continue;
			}

$output = $layout->render(compact('article', 'settings'));

if (empty($output))
			{
				continue;
			}

$outputs[] = $output;
		}

return $outputs;
	}

private static function getOrderedOutputs($ids, $layout, $field, $settings)
	{
		$ordering  = $field->fieldparams->get('articles_ordering', 'title');
		$direction = $field->fieldparams->get('articles_ordering_direction', 'ASC');

$texts = [];

foreach ($ids as $id)
		{
			if ( ! $id)
			{
				continue;
			}

$article = RL_Article::get($id);

if (empty($article->id))
			{
				continue;
			}

$text = $layout->render(compact('article', 'settings'));

if (empty($text))
			{
				continue;
			}

switch ($ordering)
			{
				case 'ordering':
				case 'hits':
					$order_id = ($article->{$ordering} * 1000000) + $article->id;
					break;
				case 'created_time':
				case 'modified_time':
				case 'publish_up':
				case 'alias':
				case 'title':
				default:
					$order_id = $article->{$ordering} . '.' . $article->id;
					break;
			}

$texts[$order_id] = $text;
		}

if (count($texts) < 2)
		{
			return $texts;
		}

ksort($texts);

if ($direction == 'DESC')
		{
			krsort($texts);
		}

return $texts;
	}

public static function prepareCustomField($context, $item, &$field)
	{
		JPluginHelper::importPlugin('fields');

$dispatcher = JEventDispatcher::getInstance();

// Event allow plugins to modify the output of the field before it is prepared
		$dispatcher->trigger('onCustomFieldsBeforePrepareField', [$context, $item, &$field]);

// Gathering the value for the field
		$value = $dispatcher->trigger('onCustomFieldsPrepareField', [$context, $item, &$field]);

if (is_array($value))
		{
			$value = implode($value, ' ');
		}

// Event allow plugins to modify the output of the prepared field
		$dispatcher->trigger('onCustomFieldsAfterPrepareField', [$context, $item, $field, &$value]);

// Assign the value
		$field->value = $value;
	}

public static function getLinkedArticleIds($field_ids, $article_id, $field)
	{
		$article_ids = [];

foreach ($field_ids as $field_id)
		{
			$field_article_ids = self::getLinkedArticleIdsByFieldId($field_id, $article_id, $field);

$article_ids = array_merge($article_ids, $field_article_ids);
		}

if (empty($field_ids))
		{
			$article_ids = self::getLinkedArticleIdsByFieldId(0, $article_id, $field);
		}

$ordering  = $field->fieldparams->get('linked_articles_ordering', 'title');
		$direction = $field->fieldparams->get('linked_articles_ordering_direction', 'ASC');

$db = JFactory::getDbo();

$nullDate = $db->quote($db->getNullDate());
		$nowDate  = $db->quote(JFactory::getDate()->toSql());

$query = $db->getQuery(true)
			->select($db->quoteName('id'))
			->from($db->quoteName('#__content'))
			->where($db->quoteName('id') . RL_DB::in($article_ids))
			->where($db->quoteName('state') . ' = 1')
			->where('(publish_up = ' . $nullDate . ' OR publish_up <= ' . $nowDate . ')')
			->where('(publish_down = ' . $nullDate . ' OR publish_down >= ' . $nowDate . ')')
			->order($db->quoteName($ordering) . ' ' . $direction);
		$db->setQuery($query);

return $db->loadColumn() ?: [];
	}

public static function getLinkedArticleIdsByFieldId($field_id, $article_id, $field)
	{
		$db = JFactory::getDbo();

$nullDate = $db->quote($db->getNullDate());
		$nowDate  = $db->quote(JFactory::getDate()->toSql());

$query = $db->getQuery(true)
			->select($db->quoteName('item_id'))
			->from($db->quoteName('#__fields_values'))
			->where($db->quoteName('value') . ' = ' . (int) $article_id);

if ($field_id)
		{
			$query->where($db->quoteName('field_id') . ' = ' . (int) $field_id);
		}

$db->setQuery($query);

$article_ids = $db->loadColumn();

$categories = self::getCategoriesByFieldId($field_id);

$query = $db->getQuery(true)
			->select($db->quoteName('id'))
			->from($db->quoteName('#__content', 'i'))
			->where($db->quoteName('i.id') . RL_DB::in($article_ids))
			->where($db->quoteName('i.state') . ' = 1')
			->where('(publish_up = ' . $nullDate . ' OR publish_up <= ' . $nowDate . ')')
			->where('(publish_down = ' . $nullDate . ' OR publish_down >= ' . $nowDate . ')');

if ( ! empty($categories))
		{
			$query->where($db->quoteName('i.catid') . RL_DB::in($categories));
		}

self::addFilters($query, $field);

$db->setQuery($query);

return $db->loadColumn();
	}

static function addFilters(&$query, $field)
	{
		require_once 'filters.php';
		$filters = new PlgFieldsArticlesFilters($field->fieldparams);

$filters->addToQuery($query);
	}

public static function getCategoriesByFieldId($field_id)
	{
		$db = JFactory::getDbo();

$query = $db->getQuery(true)
			->select($db->quoteName('category_id'))
			->from($db->quoteName('#__fields_categories'))
			->where($db->quoteName('field_id') . ' = ' . (int) $field_id);

$db->setQuery($query);

$categories       = $db->loadColumn();
		$child_categories = self::getChildCategories($categories);

return array_merge($categories, $child_categories);
	}

public static function getChildCategories($categories)
	{
		$db = JFactory::getDbo();

$query = $db->getQuery(true)
			->select($db->quoteName('id'))
			->from($db->quoteName('#__categories'))
			->where($db->quoteName('parent_id') . RL_DB::in($categories));

$db->setQuery($query);

$child_categories = $db->loadColumn();

if (empty($child_categories))
		{
			return [];
		}

$sub_child_categories = self::getChildCategories($child_categories);

return array_merge($child_categories, $sub_child_categories);
	}

public static function getDataTags($html)
	{
		RL_RegEx::matchAll('\[(?<key>[^ ]+?)\]', $html, $matches);

return $matches;
	}

public static function getDataTagValue(&$article, $tag)
	{
		if (isset($article->{$tag['key']}) && is_string($article->{$tag['key']}))
		{
			return $article->{$tag['key']};
		}

if ($tag['key'] == 'url')
		{
			$slug = $article->alias ? ($article->id . ':' . $article->alias) : $article->id;

if ( ! class_exists('ContentHelperRoute'))
			{
				require_once JPATH_SITE . '/components/com_content/helpers/route.php';
			}

return JRoute::_(ContentHelperRoute::getArticleRoute($slug, $article->catid, $article->language));
		}

$article->urls = is_object($article->urls) ? $article->urls : json_decode($article->urls);
		if (isset($article->urls->{$tag['key']}))
		{
			return $article->urls->{$tag['key']};
		}

$article->images = is_object($article->images) ? $article->images : json_decode($article->images);
		if (isset($article->images->{$tag['key']}))
		{
			return $article->images->{$tag['key']};
		}

return self::getDataTagValueCustomField($article, $tag['key']);
	}

public static function getDataTagValueCustomField(&$article, $key)
	{
		if ( ! isset($article->fields))
		{
			$article->fields = FieldsHelper::getFields('com_content.article', $article);
		}

foreach ($article->fields as $field)
		{
			if ($field->name != $key)
			{
				continue;
			}

// Field has no value
			if (empty($field->value))
			{
				return '';
			}

// Prepare the value
			if ($field->value == $field->rawvalue)
			{
				self::prepareCustomField('com_content.article', $article, $field);
			}

return $field->value;
		}

return false;
	}
}