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<?php
/**
 * @package     Joomla.Administrator
 * @subpackage  com_associations
 *
 * @copyright   (C) 2017 Open Source Matters, Inc. <https://www.joomla.org>
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\Component\Associations\Administrator\Model;

\defined('_JEXEC') or die;

use Joomla\CMS\Factory;
use Joomla\CMS\Language\Text;
use Joomla\CMS\MVC\Factory\MVCFactoryInterface;
use Joomla\CMS\MVC\Model\ListModel;
use Joomla\CMS\Table\Table;
use Joomla\Component\Associations\Administrator\Helper\AssociationsHelper;
use Joomla\Database\Exception\ExecutionFailureException;
use Joomla\Database\ParameterType;

/**
 * Methods supporting a list of article records.
 *
 * @since  3.7.0
 */
class AssociationsModel extends ListModel
{
	/**
	 * Override parent constructor.
	 *
	 * @param   array                $config   An optional associative array of configuration settings.
	 * @param   MVCFactoryInterface  $factory  The factory.
	 *
	 * @see     \Joomla\CMS\MVC\Model\BaseDatabaseModel
	 * @since   3.7
	 */
	public function __construct($config = array(), MVCFactoryInterface $factory = null)
	{
		if (empty($config['filter_fields']))
		{
			$config['filter_fields'] = array(
				'id',
				'title',
				'ordering',
				'itemtype',
				'language',
				'association',
				'menutype',
				'menutype_title',
				'level',
				'state',
				'category_id',
				'category_title',
				'access',
				'access_level',
			);
		}

parent::__construct($config, $factory);
	}

/**
	 * Method to auto-populate the model state.
	 *
	 * Note. Calling getState in this method will result in recursion.
	 *
	 * @param   string  $ordering   An optional ordering field.
	 * @param   string  $direction  An optional direction (asc|desc).
	 *
	 * @return  void
	 *
	 * @since   3.7.0
	 */
	protected function populateState($ordering = 'ordering', $direction = 'asc')
	{
		$app = Factory::getApplication();

$forcedLanguage = $app->input->get('forcedLanguage', '', 'cmd');
		$forcedItemType = $app->input->get('forcedItemType', '', 'string');

// Adjust the context to support modal layouts.
		if ($layout = $app->input->get('layout'))
		{
			$this->context .= '.' . $layout;
		}

// Adjust the context to support forced languages.
		if ($forcedLanguage)
		{
			$this->context .= '.' . $forcedLanguage;
		}

// Adjust the context to support forced component item types.
		if ($forcedItemType)
		{
			$this->context .= '.' . $forcedItemType;
		}

$this->setState('itemtype', $this->getUserStateFromRequest($this->context . '.itemtype', 'itemtype', '', 'string'));
		$this->setState('language', $this->getUserStateFromRequest($this->context . '.language', 'language', '', 'string'));

$this->setState('filter.search', $this->getUserStateFromRequest($this->context . '.filter.search', 'filter_search', '', 'string'));
		$this->setState('filter.state', $this->getUserStateFromRequest($this->context . '.filter.state', 'filter_state', '', 'cmd'));
		$this->setState('filter.category_id', $this->getUserStateFromRequest($this->context . '.filter.category_id', 'filter_category_id', '', 'cmd'));
		$this->setState('filter.menutype', $this->getUserStateFromRequest($this->context . '.filter.menutype', 'filter_menutype', '', 'string'));
		$this->setState('filter.access', $this->getUserStateFromRequest($this->context . '.filter.access', 'filter_access', '', 'string'));
		$this->setState('filter.level', $this->getUserStateFromRequest($this->context . '.filter.level', 'filter_level', '', 'cmd'));

// List state information.
		parent::populateState($ordering, $direction);

// Force a language.
		if (!empty($forcedLanguage))
		{
			$this->setState('language', $forcedLanguage);
		}

// Force a component item type.
		if (!empty($forcedItemType))
		{
			$this->setState('itemtype', $forcedItemType);
		}
	}

/**
	 * 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  $id  A prefix for the store id.
	 *
	 * @return  string  A store id.
	 *
	 * @since  3.7.0
	 */
	protected function getStoreId($id = '')
	{
		// Compile the store id.
		$id .= ':' . $this->getState('itemtype');
		$id .= ':' . $this->getState('language');
		$id .= ':' . $this->getState('filter.search');
		$id .= ':' . $this->getState('filter.state');
		$id .= ':' . $this->getState('filter.category_id');
		$id .= ':' . $this->getState('filter.menutype');
		$id .= ':' . $this->getState('filter.access');
		$id .= ':' . $this->getState('filter.level');

return parent::getStoreId($id);
	}

/**
	 * Build an SQL query to load the list data.
	 *
	 * @return  \JDatabaseQuery|boolean
	 *
	 * @since  3.7.0
	 */
	protected function getListQuery()
	{
		$type         = null;

list($extensionName, $typeName) = explode('.', $this->state->get('itemtype'), 2);

$extension = AssociationsHelper::getSupportedExtension($extensionName);
		$types     = $extension->get('types');

if (array_key_exists($typeName, $types))
		{
			$type = $types[$typeName];
		}

if (is_null($type))
		{
			return false;
		}

// Create a new query object.
		$user     = Factory::getUser();
		$db       = $this->getDbo();
		$query    = $db->getQuery(true);

$details = $type->get('details');

if (!array_key_exists('support', $details))
		{
			return false;
		}

$support = $details['support'];

if (!array_key_exists('fields', $details))
		{
			return false;
		}

$fields = $details['fields'];

// Main query.
		$query->select($db->quoteName($fields['id'], 'id'))
			->select($db->quoteName($fields['title'], 'title'))
			->select($db->quoteName($fields['alias'], 'alias'));

if (!array_key_exists('tables', $details))
		{
			return false;
		}

$tables = $details['tables'];

foreach ($tables as $key => $table)
		{
			$query->from($db->quoteName($table, $key));
		}

if (!array_key_exists('joins', $details))
		{
			return false;
		}

$joins = $details['joins'];

foreach ($joins as $join)
		{
			$query->join($join['type'], $db->quoteName($join['condition']));
		}

// Join over the language.
		$query->select($db->quoteName($fields['language'], 'language'))
			->select($db->quoteName('l.title', 'language_title'))
			->select($db->quoteName('l.image', 'language_image'))
			->join(
				'LEFT',
				$db->quoteName('#__languages', 'l'),
				$db->quoteName('l.lang_code') . ' = ' . $db->quoteName($fields['language'])
			);
		$extensionNameItem = $extensionName . '.item';

// Join over the associations.
		$query->select('COUNT(' . $db->quoteName('asso2.id') . ') > 1 AS ' . $db->quoteName('association'))
			->join(
				'LEFT',
				$db->quoteName('#__associations', 'asso'),
				$db->quoteName('asso.id') . ' = ' . $db->quoteName($fields['id'])
				. ' AND ' . $db->quoteName('asso.context') . ' = :context'
			)
			->join(
				'LEFT',
				$db->quoteName('#__associations', 'asso2'),
				$db->quoteName('asso2.key') . ' = ' . $db->quoteName('asso.key')
			)
			->bind(':context', $extensionNameItem);

// Prepare the group by clause.
		$groupby = array(
			$fields['id'],
			$fields['title'],
			$fields['alias'],
			$fields['language'],
			'l.title',
			'l.image',
		);

// Select author for ACL checks.
		if (!empty($fields['created_user_id']))
		{
			$query->select($db->quoteName($fields['created_user_id'], 'created_user_id'));

$groupby[] = $fields['created_user_id'];
		}

// Select checked out data for check in checkins.
		if (!empty($fields['checked_out']) && !empty($fields['checked_out_time']))
		{
			$query->select($db->quoteName($fields['checked_out'], 'checked_out'))
				->select($db->quoteName($fields['checked_out_time'], 'checked_out_time'));

// Join over the users.
			$query->select($db->quoteName('u.name', 'editor'))
				->join(
					'LEFT',
					$db->quoteName('#__users', 'u'),
					$db->quoteName('u.id') . ' = ' . $db->quoteName($fields['checked_out'])
				);

$groupby[] = 'u.name';
			$groupby[] = $fields['checked_out'];
			$groupby[] = $fields['checked_out_time'];
		}

// If component item type supports ordering, select the ordering also.
		if (!empty($fields['ordering']))
		{
			$query->select($db->quoteName($fields['ordering'], 'ordering'));

$groupby[] = $fields['ordering'];
		}

// If component item type supports state, select the item state also.
		if (!empty($fields['state']))
		{
			$query->select($db->quoteName($fields['state'], 'state'));

$groupby[] = $fields['state'];
		}

// If component item type supports level, select the level also.
		if (!empty($fields['level']))
		{
			$query->select($db->quoteName($fields['level'], 'level'));

$groupby[] = $fields['level'];
		}

// If component item type supports categories, select the category also.
		if (!empty($fields['catid']))
		{
			$query->select($db->quoteName($fields['catid'], 'catid'));

// Join over the categories.
			$query->select($db->quoteName('c.title', 'category_title'))
				->join(
					'LEFT',
					$db->quoteName('#__categories', 'c'),
					$db->quoteName('c.id') . ' = ' . $db->quoteName($fields['catid'])
				);

$groupby[] = 'c.title';
			$groupby[] = $fields['catid'];
		}

// If component item type supports menu type, select the menu type also.
		if (!empty($fields['menutype']))
		{
			$query->select($db->quoteName($fields['menutype'], 'menutype'));

// Join over the menu types.
			$query->select($db->quoteName('mt.title', 'menutype_title'))
				->select($db->quoteName('mt.id', 'menutypeid'))
				->join(
					'LEFT',
					$db->quoteName('#__menu_types', 'mt'),
					$db->quoteName('mt.menutype') . ' = ' . $db->quoteName($fields['menutype'])
				);

$groupby[] = 'mt.title';
			$groupby[] = 'mt.id';
			$groupby[] = $fields['menutype'];
		}

// If component item type supports access level, select the access level also.
		if (array_key_exists('acl', $support) && $support['acl'] == true && !empty($fields['access']))
		{
			$query->select($db->quoteName($fields['access'], 'access'));

// Join over the access levels.
			$query->select($db->quoteName('ag.title', 'access_level'))
				->join(
					'LEFT',
					$db->quoteName('#__viewlevels', 'ag'),
					$db->quoteName('ag.id') . ' = ' . $db->quoteName($fields['access'])
				);

$groupby[] = 'ag.title';
			$groupby[] = $fields['access'];

// Implement View Level Access.
			if (!$user->authorise('core.admin', $extensionName))
			{
				$groups = $user->getAuthorisedViewLevels();
				$query->whereIn($db->quoteName($fields['access']), $groups);
			}
		}

// If component item type is menus we need to remove the root item and the administrator menu.
		if ($extensionName === 'com_menus')
		{
			$query->where($db->quoteName($fields['id']) . ' > 1')
				->where($db->quoteName('a.client_id') . ' = 0');
		}

// If component item type is category we need to remove all other component categories.
		if ($typeName === 'category')
		{
			$query->where($db->quoteName('a.extension') . ' = :extensionname')
				->bind(':extensionname', $extensionName);
		}
		elseif ($typeNameExploded = explode('.', $typeName))
		{
			if (count($typeNameExploded) > 1 && array_pop($typeNameExploded) === 'category')
			{
				$section = implode('.', $typeNameExploded);
				$extensionNameSection = $extensionName . '.' . $section;
				$query->where($db->quoteName('a.extension') . ' = :extensionsection')
					->bind(':extensionsection', $extensionNameSection);
			}
		}

// Filter on the language.
		if ($language = $this->getState('language'))
		{
			$query->where($db->quoteName($fields['language']) . ' = :language')
				->bind(':language', $language);
		}

// Filter by item state.
		$state = $this->getState('filter.state');

if (is_numeric($state))
		{
			$state = (int) $state;
			$query->where($db->quoteName($fields['state']) . ' = :state')
				->bind(':state', $state, ParameterType::INTEGER);
		}
		elseif ($state === '')
		{
			$query->whereIn($db->quoteName($fields['state']), [0, 1]);
		}

// Filter on the category.
		$baselevel = 1;

if ($categoryId = $this->getState('filter.category_id'))
		{
			$categoryTable = Table::getInstance('Category', 'JTable');
			$categoryTable->load($categoryId);
			$baselevel = (int) $categoryTable->level;

$lft = (int) $categoryTable->lft;
			$rgt = (int) $categoryTable->rgt;
			$query->where($db->quoteName('c.lft') . ' >= :lft')
				->where($db->quoteName('c.rgt') . ' <= :rgt')
				->bind(':lft', $lft, ParameterType::INTEGER)
				->bind(':rgt', $rgt, ParameterType::INTEGER);
		}

// Filter on the level.
		if ($level = $this->getState('filter.level'))
		{
			$queryLevel = ((int) $level + (int) $baselevel - 1);
			$query->where($db->quoteName('a.level') . ' <= :alevel')
				->bind(':alevel', $queryLevel, ParameterType::INTEGER);
		}

// Filter by menu type.
		if ($menutype = $this->getState('filter.menutype'))
		{
			$query->where($db->quoteName($fields['menutype']) . ' = :menutype2')
				->bind(':menutype2', $menutype);
		}

// Filter by access level.
		if ($access = $this->getState('filter.access'))
		{
			$access = (int) $access;
			$query->where($db->quoteName($fields['access']) . ' = :access')
				->bind(':access', $access, ParameterType::INTEGER);
		}

// Filter by search in name.
		if ($search = $this->getState('filter.search'))
		{
			if (stripos($search, 'id:') === 0)
			{
				$search = (int) substr($search, 3);
				$query->where($db->quoteName($fields['id']) . ' = :searchid')
					->bind(':searchid', $search, ParameterType::INTEGER);
			}
			else
			{
				$search = '%' . str_replace(' ', '%', trim($search)) . '%';
				$query->where('(' . $db->quoteName($fields['title']) . ' LIKE :title'
					. ' OR ' . $db->quoteName($fields['alias']) . ' LIKE :alias)'
				)
					->bind(':title', $search)
					->bind(':alias', $search);
			}
		}

// Add the group by clause
		$query->group($db->quoteName($groupby));

// Add the list ordering clause
		$listOrdering  = $this->state->get('list.ordering', 'id');
		$orderDirn     = $this->state->get('list.direction', 'ASC');

$query->order($db->escape($listOrdering) . ' ' . $db->escape($orderDirn));

return $query;
	}

/**
	 * Delete associations from #__associations table.
	 *
	 * @param   string  $context  The associations context. Empty for all.
	 * @param   string  $key      The associations key. Empty for all.
	 *
	 * @return  boolean  True on success.
	 *
	 * @since  3.7.0
	 */
	public function purge($context = '', $key = '')
	{
		$app   = Factory::getApplication();
		$db    = $this->getDbo();
		$query = $db->getQuery(true)->delete($db->quoteName('#__associations'));

// Filter by associations context.
		if ($context)
		{
			$query->where($db->quoteName('context') . ' = :context')
				->bind(':context', $context);
		}

// Filter by key.
		if ($key)
		{
			$query->where($db->quoteName('key') . ' = :key')
				->bind(':key', $key);
		}

$db->setQuery($query);

try
		{
			$db->execute();
		}
		catch (ExecutionFailureException $e)
		{
			$app->enqueueMessage(Text::_('COM_ASSOCIATIONS_PURGE_FAILED'), 'error');

return false;
		}

$app->enqueueMessage(
			Text::_((int) $db->getAffectedRows() > 0 ? 'COM_ASSOCIATIONS_PURGE_SUCCESS' : 'COM_ASSOCIATIONS_PURGE_NONE'),
			'message'
		);

return true;
	}

/**
	 * Delete orphans from the #__associations table.
	 *
	 * @param   string  $context  The associations context. Empty for all.
	 * @param   string  $key      The associations key. Empty for all.
	 *
	 * @return  boolean  True on success
	 *
	 * @since  3.7.0
	 */
	public function clean($context = '', $key = '')
	{
		$app   = Factory::getApplication();
		$db    = $this->getDbo();
		$query = $db->getQuery(true)
			->select($db->quoteName('key') . ', COUNT(*)')
			->from($db->quoteName('#__associations'))
			->group($db->quoteName('key'))
			->having('COUNT(*) = 1');

// Filter by associations context.
		if ($context)
		{
			$query->where($db->quoteName('context') . ' = :context')
				->bind(':context', $context);
		}

// Filter by key.
		if ($key)
		{
			$query->where($db->quoteName('key') . ' = :key')
				->bind(':key', $key);
		}

$db->setQuery($query);

$assocKeys = $db->loadObjectList();

$count = 0;

// We have orphans. Let's delete them.
		foreach ($assocKeys as $value)
		{
			$query->clear()
				->delete($db->quoteName('#__associations'))
				->where($db->quoteName('key') . ' = :valuekey')
				->bind(':valuekey', $value->key);

$db->setQuery($query);

try
			{
				$db->execute();
			}
			catch (ExecutionFailureException $e)
			{
				$app->enqueueMessage(Text::_('COM_ASSOCIATIONS_DELETE_ORPHANS_FAILED'), 'error');

return false;
			}

$count += (int) $db->getAffectedRows();
		}

$app->enqueueMessage(
			Text::_($count > 0 ? 'COM_ASSOCIATIONS_DELETE_ORPHANS_SUCCESS' : 'COM_ASSOCIATIONS_DELETE_ORPHANS_NONE'),
			'message'
		);

return true;
	}
}