<?php
/**
 * @package     Joomla.Site
 * @subpackage  com_banners
 *
 * @copyright   Copyright (C) 2005 - 2019 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

defined('_JEXEC') or die;

use Joomla\Registry\Registry;
use Joomla\Utilities\ArrayHelper;

JTable::addIncludePath(JPATH_COMPONENT_ADMINISTRATOR . '/tables');

/**
 * Banners model for the Joomla Banners component.
 *
 * @since  1.6
 */
class BannersModelBanners extends JModelList
{
	/**
	 * Method to get a store id based on model configuration state.
	 *
	 * This is necessary because the model is used by the component and
	 * different modules that might need different sets of data or different
	 * ordering requirements.
	 *
	 * @param   string  $id  A prefix for the store id.
	 *
	 * @return  string  A store id.
	 *
	 * @since   1.6
	 */
	protected function getStoreId($id = '')
	{
		// Compile the store id.
		$id .= ':' . $this->getState('filter.search');
		$id .= ':' . $this->getState('filter.tag_search');
		$id .= ':' . $this->getState('filter.client_id');
		$id .= ':' . serialize($this->getState('filter.category_id'));
		$id .= ':' . serialize($this->getState('filter.keywords'));

		return parent::getStoreId($id);
	}

	/**
	 * Method to get a JDatabaseQuery object for retrieving the data set from a database.
	 *
	 * @return  JDatabaseQuery   A JDatabaseQuery object to retrieve the data set.
	 *
	 * @since   1.6
	 */
	protected function getListQuery()
	{
		$db         = $this->getDbo();
		$query      = $db->getQuery(true);
		$ordering   = $this->getState('filter.ordering');
		$tagSearch  = $this->getState('filter.tag_search');
		$cid        = $this->getState('filter.client_id');
		$categoryId = $this->getState('filter.category_id');
		$keywords   = $this->getState('filter.keywords');
		$randomise  = ($ordering === 'random');
		$nullDate   = $db->quote($db->getNullDate());
		$nowDate    = $db->quote(JFactory::getDate()->toSql());

		$query->select(
			'a.id as id,'
				. 'a.type as type,'
				. 'a.name as name,'
				. 'a.clickurl as clickurl,'
				. 'a.cid as cid,'
				. 'a.description as description,'
				. 'a.params as params,'
				. 'a.custombannercode as custombannercode,'
				. 'a.track_impressions as track_impressions,'
				. 'cl.track_impressions as client_track_impressions'
		)
			->from('#__banners as a')
			->join('LEFT', '#__banner_clients AS cl ON cl.id = a.cid')
			->where('a.state=1')
			->where('(a.publish_up = ' . $nullDate . ' OR a.publish_up <= ' . $nowDate . ')')
			->where('(a.publish_down = ' . $nullDate . ' OR a.publish_down >= ' . $nowDate . ')')
			->where('(a.imptotal = 0 OR a.impmade <= a.imptotal)');

		if ($cid)
		{
			$query->where('a.cid = ' . (int) $cid)
				->where('cl.state = 1');
		}

		// Filter by a single or group of categories
		if (is_numeric($categoryId))
		{
			$type = $this->getState('filter.category_id.include', true) ? '= ' : '<> ';

			// Add subcategory check
			$includeSubcategories = $this->getState('filter.subcategories', false);
			$categoryEquals = 'a.catid ' . $type . (int) $categoryId;

			if ($includeSubcategories)
			{
				$levels = (int) $this->getState('filter.max_category_levels', '1');

				// Create a subquery for the subcategory list
				$subQuery = $db->getQuery(true);
				$subQuery->select('sub.id')
					->from('#__categories as sub')
					->join('INNER', '#__categories as this ON sub.lft > this.lft AND sub.rgt < this.rgt')
					->where('this.id = ' . (int) $categoryId)
					->where('sub.level <= this.level + ' . $levels);

				// Add the subquery to the main query
				$query->where('(' . $categoryEquals . ' OR a.catid IN (' . (string) $subQuery . '))');
			}
			else
			{
				$query->where($categoryEquals);
			}
		}
		elseif (is_array($categoryId) && (count($categoryId) > 0))
		{
			$categoryId = ArrayHelper::toInteger($categoryId);
			$categoryId = implode(',', $categoryId);

			if ($categoryId != '0')
			{
				$type = $this->getState('filter.category_id.include', true) ? 'IN' : 'NOT IN';
				$query->where('a.catid ' . $type . ' (' . $categoryId . ')');
			}
		}

		if ($tagSearch)
		{
			if (!$keywords)
			{
				$query->where('0 != 0');
			}
			else
			{
				$temp   = array();
				$config = JComponentHelper::getParams('com_banners');
				$prefix = $config->get('metakey_prefix');

				if ($categoryId)
				{
					$query->join('LEFT', '#__categories as cat ON a.catid = cat.id');
				}

				foreach ($keywords as $keyword)
				{
					$condition1 = 'a.own_prefix=1 '
						. ' AND a.metakey_prefix=SUBSTRING(' . $db->quote($keyword) . ',1,LENGTH( a.metakey_prefix)) '
						. ' OR a.own_prefix=0 '
						. ' AND cl.own_prefix=1 '
						. ' AND cl.metakey_prefix=SUBSTRING(' . $db->quote($keyword) . ',1,LENGTH(cl.metakey_prefix)) '
						. ' OR a.own_prefix=0 '
						. ' AND cl.own_prefix=0 '
						. ' AND ' . ($prefix == substr($keyword, 0, strlen($prefix)) ? '0 = 0' : '0 != 0');

					$regexp = $db->quote("[[:<:]]" . $db->escape($keyword) . "[[:>:]]");
					$condition2 = "a.metakey " . $query->regexp($regexp) . " ";

					if ($cid)
					{
						$condition2 .= " OR cl.metakey " . $query->regexp($regexp) . " ";
					}

					if ($categoryId)
					{
						$condition2 .= " OR cat.metakey " . $query->regexp($regexp) . " ";
					}

					$temp[] = "($condition1) AND ($condition2)";
				}

				$query->where('(' . implode(' OR ', $temp) . ')');
			}
		}

		// Filter by language
		if ($this->getState('filter.language'))
		{
			$query->where('a.language in (' . $db->quote(JFactory::getLanguage()->getTag()) . ',' . $db->quote('*') . ')');
		}

		$query->order('a.sticky DESC,' . ($randomise ? $query->Rand() : 'a.ordering'));

		return $query;
	}

	/**
	 * Get a list of banners.
	 *
	 * @return  array
	 *
	 * @since   1.6
	 */
	public function getItems()
	{
		if ($this->getState('filter.tag_search'))
		{
			// Filter out empty keywords.
			$keywords = array_values(array_filter(array_map('trim', $this->getState('filter.keywords')), 'strlen'));

			// Re-set state before running the query.
			$this->setState('filter.keywords', $keywords);

			// If no keywords are provided, avoid running the query.
			if (!$keywords)
			{
				$this->cache['items'] = array();

				return $this->cache['items'];
			}
		}

		if (!isset($this->cache['items']))
		{
			$this->cache['items'] = parent::getItems();

			foreach ($this->cache['items'] as &$item)
			{
				$item->params = new Registry($item->params);
			}
		}

		return $this->cache['items'];
	}

	/**
	 * Makes impressions on a list of banners
	 *
	 * @return  void
	 *
	 * @since   1.6
	 */
	public function impress()
	{
		$trackDate = JFactory::getDate()->toSql();
		$items     = $this->getItems();
		$db        = $this->getDbo();
		$query     = $db->getQuery(true);

		if (!count($items))
		{
			return;
		}

		foreach ($items as $item)
		{
			$bid[] = (int) $item->id;
		}

		// Increment impression made
		$query->clear()
			->update('#__banners')
			->set('impmade = (impmade + 1)')
			->where('id IN (' . implode(',', $bid) . ')');
		$db->setQuery($query);

		try
		{
			$db->execute();
		}
		catch (JDatabaseExceptionExecuting $e)
		{
			JError::raiseError(500, $e->getMessage());
		}

		foreach ($items as $item)
		{
			// Track impressions
			$trackImpressions = $item->track_impressions;

			if ($trackImpressions < 0 && $item->cid)
			{
				$trackImpressions = $item->client_track_impressions;
			}

			if ($trackImpressions < 0)
			{
				$config           = JComponentHelper::getParams('com_banners');
				$trackImpressions = $config->get('track_impressions');
			}

			if ($trackImpressions > 0)
			{
				// Is track already created?
				// Update count
				$query->clear();
				$query->update('#__banner_tracks')
					->set($db->quoteName('count') . ' = (' . $db->quoteName('count') . ' + 1)')
					->where('track_type=1')
					->where('banner_id=' . (int) $item->id)
					->where('track_date=' . $db->quote($trackDate));

				$db->setQuery($query);

				try
				{
					$db->execute();
				}
				catch (JDatabaseExceptionExecuting $e)
				{
					JError::raiseError(500, $e->getMessage());
				}

				if ($db->getAffectedRows() === 0)
				{
					// Insert new count
					$query->clear();

					$query->insert('#__banner_tracks')
						->columns(
							array(
								$db->quoteName('count'), $db->quoteName('track_type'),
								$db->quoteName('banner_id'), $db->quoteName('track_date')
							)
						)
						->values('1, 1, ' . (int) $item->id . ', ' . $db->quote($trackDate));

					$db->setQuery($query);

					try
					{
						$db->execute();
					}
					catch (JDatabaseExceptionExecuting $e)
					{
						JError::raiseError(500, $e->getMessage());
					}
				}
			}
		}
	}
}