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<?php
/**
 * @package     Joomla.Administrator
 * @subpackage  com_fields
 *
 * @copyright   (C) 2016 Open Source Matters, Inc. <https://www.joomla.org>
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\Component\Fields\Administrator\Model;

\defined('_JEXEC') or die;

use Joomla\CMS\Categories\CategoryServiceInterface;
use Joomla\CMS\Categories\SectionNotFoundException;
use Joomla\CMS\Factory;
use Joomla\CMS\MVC\Factory\MVCFactoryInterface;
use Joomla\CMS\MVC\Model\ListModel;
use Joomla\Component\Fields\Administrator\Helper\FieldsHelper;
use Joomla\Database\ParameterType;
use Joomla\Registry\Registry;
use Joomla\Utilities\ArrayHelper;

/**
 * Fields Model
 *
 * @since  3.7.0
 */
class FieldsModel extends ListModel
{
	/**
	 * Constructor
	 *
	 * @param   array                $config   An array of configuration options (name, state, dbo, table_path, ignore_request).
	 * @param   MVCFactoryInterface  $factory  The factory.
	 *
	 * @since   3.7.0
	 * @throws  \Exception
	 */
	public function __construct($config = array(), MVCFactoryInterface $factory = null)
	{
		if (empty($config['filter_fields']))
		{
			$config['filter_fields'] = array(
				'id', 'a.id',
				'title', 'a.title',
				'type', 'a.type',
				'name', 'a.name',
				'state', 'a.state',
				'access', 'a.access',
				'access_level',
				'only_use_in_subform',
				'language', 'a.language',
				'ordering', 'a.ordering',
				'checked_out', 'a.checked_out',
				'checked_out_time', 'a.checked_out_time',
				'created_time', 'a.created_time',
				'created_user_id', 'a.created_user_id',
				'group_title', 'g.title',
				'category_id', 'a.category_id',
				'group_id', 'a.group_id',
				'assigned_cat_ids'
			);
		}

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

/**
	 * Method to auto-populate the model state.
	 *
	 * This method should only be called once per instantiation and is designed
	 * to be called on the first call to the getState() method unless the model
	 * configuration flag to ignore the request is set.
	 *
	 * 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 = null, $direction = null)
	{
		// List state information.
		parent::populateState('a.ordering', 'asc');

$context = $this->getUserStateFromRequest($this->context . '.context', 'context', 'com_content.article', 'CMD');
		$this->setState('filter.context', $context);

// Split context into component and optional section
		$parts = FieldsHelper::extract($context);

if ($parts)
		{
			$this->setState('filter.component', $parts[0]);
			$this->setState('filter.section', $parts[1]);
		}
	}

/**
	 * Method to get a store id based on the 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  $id  An identifier string to generate the store id.
	 *
	 * @return  string  A store id.
	 *
	 * @since   3.7.0
	 */
	protected function getStoreId($id = '')
	{
		// Compile the store id.
		$id .= ':' . $this->getState('filter.search');
		$id .= ':' . $this->getState('filter.context');
		$id .= ':' . serialize($this->getState('filter.assigned_cat_ids'));
		$id .= ':' . $this->getState('filter.state');
		$id .= ':' . $this->getState('filter.group_id');
		$id .= ':' . serialize($this->getState('filter.language'));

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   3.7.0
	 */
	protected function getListQuery()
	{
		// Create a new query object.
		$db    = $this->getDbo();
		$query = $db->getQuery(true);
		$user  = Factory::getUser();
		$app   = Factory::getApplication();

// Select the required fields from the table.
		$query->select(
			$this->getState(
				'list.select',
				'DISTINCT a.id, a.title, a.name, a.checked_out, a.checked_out_time, a.note' .
				', a.state, a.access, a.created_time, a.created_user_id, a.ordering, a.language' .
				', a.fieldparams, a.params, a.type, a.default_value, a.context, a.group_id' .
				', a.label, a.description, a.required, a.only_use_in_subform'
			)
		);
		$query->from('#__fields AS a');

// Join over the language
		$query->select('l.title AS language_title, l.image AS language_image')
			->join('LEFT', $db->quoteName('#__languages') . ' AS l ON l.lang_code = a.language');

// Join over the users for the checked out user.
		$query->select('uc.name AS editor')->join('LEFT', '#__users AS uc ON uc.id=a.checked_out');

// Join over the asset groups.
		$query->select('ag.title AS access_level')->join('LEFT', '#__viewlevels AS ag ON ag.id = a.access');

// Join over the users for the author.
		$query->select('ua.name AS author_name')->join('LEFT', '#__users AS ua ON ua.id = a.created_user_id');

// Join over the field groups.
		$query->select('g.title AS group_title, g.access as group_access, g.state AS group_state, g.note as group_note');
		$query->join('LEFT', '#__fields_groups AS g ON g.id = a.group_id');

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

// Filter by access level.
		if ($access = $this->getState('filter.access'))
		{
			if (is_array($access))
			{
				$access = ArrayHelper::toInteger($access);
				$query->whereIn($db->quoteName('a.access'), $access);
			}
			else
			{
				$access = (int) $access;
				$query->where($db->quoteName('a.access') . ' = :access')
					->bind(':access', $access, ParameterType::INTEGER);
			}
		}

if (($categories = $this->getState('filter.assigned_cat_ids')) && $context)
		{
			$categories = (array) $categories;
			$categories = ArrayHelper::toInteger($categories);
			$parts = FieldsHelper::extract($context);

if ($parts)
			{
				// Get the categories for this component (and optionally this section, if available)
				$cat = (
					function () use ($parts) {
						// Get the CategoryService for this component
						$componentObject = $this->bootComponent($parts[0]);

if (!$componentObject instanceof CategoryServiceInterface)
						{
							// No CategoryService -> no categories
							return null;
						}

$cat = null;

// Try to get the categories for this component and section
						try
						{
							$cat = $componentObject->getCategory([], $parts[1] ?: '');
						}
						catch (SectionNotFoundException $e)
						{
							// Not found for component and section -> Now try once more without the section, so only component
							try
							{
								$cat = $componentObject->getCategory();
							}
							catch (SectionNotFoundException $e)
							{
								// If we haven't found it now, return (no categories available for this component)
								return null;
							}
						}

// So we found categories for at least the component, return them
						return $cat;
					}
				)();

if ($cat)
				{
					foreach ($categories as $assignedCatIds)
					{
						// Check if we have the actual category
						$parent = $cat->get($assignedCatIds);

if ($parent)
						{
							$categories[] = (int) $parent->id;

// Traverse the tree up to get all the fields which are attached to a parent
							while ($parent->getParent() && $parent->getParent()->id != 'root')
							{
								$parent = $parent->getParent();
								$categories[] = (int) $parent->id;
							}
						}
					}
				}
			}

$categories = array_unique($categories);

// Join over the assigned categories
			$query->join('LEFT', $db->quoteName('#__fields_categories') . ' AS fc ON fc.field_id = a.id');

if (in_array('0', $categories))
			{
				$query->where(
					'(' .
						$db->quoteName('fc.category_id') . ' IS NULL OR ' .
						$db->quoteName('fc.category_id') . ' IN (' . implode(',', $query->bindArray(array_values($categories), ParameterType::INTEGER)) . ')' .
					')'
				);
			}
			else
			{
				$query->whereIn($db->quoteName('fc.category_id'), $categories);
			}
		}

// Implement View Level Access
		if (!$app->isClient('administrator') || !$user->authorise('core.admin'))
		{
			$groups = $user->getAuthorisedViewLevels();
			$query->whereIn($db->quoteName('a.access'), $groups);
			$query->extendWhere(
				'AND',
				[
					$db->quoteName('a.group_id') . ' = 0',
					$db->quoteName('g.access') . ' IN (' . implode(',', $query->bindArray($groups, ParameterType::INTEGER)) . ')'
				],
				'OR'
			);
		}

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

// Include group state only when not on on back end list
		$includeGroupState = !$app->isClient('administrator') ||
			$app->input->get('option') != 'com_fields' ||
			$app->input->get('view') != 'fields';

if (is_numeric($state))
		{
			$state = (int) $state;
			$query->where($db->quoteName('a.state') . ' = :state')
				->bind(':state', $state, ParameterType::INTEGER);

if ($includeGroupState)
			{
				$query->extendWhere(
					'AND',
					[
						$db->quoteName('a.group_id') . ' = 0',
						$db->quoteName('g.state') . ' = :gstate',
					],
					'OR'
				)
					->bind(':gstate', $state, ParameterType::INTEGER);
			}
		}
		elseif (!$state)
		{
			$query->whereIn($db->quoteName('a.state'), [0, 1]);

if ($includeGroupState)
			{
				$query->extendWhere(
					'AND',
					[
						$db->quoteName('a.group_id') . ' = 0',
						$db->quoteName('g.state') . ' IN (' . implode(',', $query->bindArray([0, 1], ParameterType::INTEGER)) . ')'
					],
					'OR'
				);
			}
		}

$groupId = $this->getState('filter.group_id');

if (is_numeric($groupId))
		{
			$groupId = (int) $groupId;
			$query->where($db->quoteName('a.group_id') . ' = :groupid')
				->bind(':groupid', $groupId, ParameterType::INTEGER);
		}

$onlyUseInSubForm = $this->getState('filter.only_use_in_subform');

if (is_numeric($onlyUseInSubForm))
		{
			$onlyUseInSubForm = (int) $onlyUseInSubForm;
			$query->where($db->quoteName('a.only_use_in_subform') . ' = :only_use_in_subform')
				->bind(':only_use_in_subform', $onlyUseInSubForm, ParameterType::INTEGER);
		}

// Filter by search in title
		$search = $this->getState('filter.search');

if (!empty($search))
		{
			if (stripos($search, 'id:') === 0)
			{
				$search = (int) substr($search, 3);
				$query->where($db->quoteName('a.id') . ' = :id')
					->bind(':id', $search, ParameterType::INTEGER);
			}
			elseif (stripos($search, 'author:') === 0)
			{
				$search = '%' . substr($search, 7) . '%';
				$query->where(
					'(' .
						$db->quoteName('ua.name') . ' LIKE :name OR ' .
						$db->quoteName('ua.username') . ' LIKE :username' .
					')'
				)
					->bind(':name', $search)
					->bind(':username', $search);
			}
			else
			{
				$search = '%' . str_replace(' ', '%', trim($search)) . '%';
				$query->where(
					'(' .
						$db->quoteName('a.title') . ' LIKE :title OR ' .
						$db->quoteName('a.name') . ' LIKE :sname OR ' .
						$db->quoteName('a.note') . ' LIKE :note' .
					')'
				)
					->bind(':title', $search)
					->bind(':sname', $search)
					->bind(':note', $search);
			}
		}

// Filter on the language.
		if ($language = $this->getState('filter.language'))
		{
			$language = (array) $language;

$query->whereIn($db->quoteName('a.language'), $language, ParameterType::STRING);
		}

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

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

return $query;
	}

/**
	 * Gets an array of objects from the results of database query.
	 *
	 * @param   string   $query       The query.
	 * @param   integer  $limitstart  Offset.
	 * @param   integer  $limit       The number of records.
	 *
	 * @return  array  An array of results.
	 *
	 * @since   3.7.0
	 * @throws  \RuntimeException
	 */
	protected function _getList($query, $limitstart = 0, $limit = 0)
	{
		$result = parent::_getList($query, $limitstart, $limit);

if (is_array($result))
		{
			foreach ($result as $field)
			{
				$field->fieldparams = new Registry($field->fieldparams);
				$field->params = new Registry($field->params);
			}
		}

return $result;
	}

/**
	 * Get the filter form
	 *
	 * @param   array    $data      data
	 * @param   boolean  $loadData  load current data
	 *
	 * @return  \JForm|false  the JForm object or false
	 *
	 * @since   3.7.0
	 */
	public function getFilterForm($data = array(), $loadData = true)
	{
		$form = parent::getFilterForm($data, $loadData);

if ($form)
		{
			$form->setValue('context', null, $this->getState('filter.context'));
			$form->setFieldAttribute('group_id', 'context', $this->getState('filter.context'), 'filter');
			$form->setFieldAttribute('assigned_cat_ids', 'extension', $this->state->get('filter.component'), 'filter');
		}

return $form;
	}

/**
	 * Get the groups for the batch method
	 *
	 * @return  array  An array of groups
	 *
	 * @since   3.7.0
	 */
	public function getGroups()
	{
		$user       = Factory::getUser();
		$viewlevels = ArrayHelper::toInteger($user->getAuthorisedViewLevels());
		$context    = $this->state->get('filter.context');

$db    = $this->getDbo();
		$query = $db->getQuery(true);
		$query->select(
			[
				$db->quoteName('title', 'text'),
				$db->quoteName('id', 'value'),
				$db->quoteName('state'),
			]
		);
		$query->from($db->quoteName('#__fields_groups'));
		$query->whereIn($db->quoteName('state'), [0, 1]);
		$query->where($db->quoteName('context') . ' = :context');
		$query->whereIn($db->quoteName('access'), $viewlevels);
		$query->bind(':context', $context);

$db->setQuery($query);

return $db->loadObjectList();
	}
}