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<?php
/**
* Joomla! Content Management System
*
* @copyright (C) 2009 Open Source Matters, Inc. <https://www.joomla.org>
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
namespace Joomla\CMS\MVC\Model;
\defined('JPATH_PLATFORM') or die;
use Exception;
use Joomla\CMS\Factory;
use Joomla\CMS\Filter\InputFilter;
use Joomla\CMS\Form\Form;
use Joomla\CMS\Form\FormFactoryAwareTrait;
use Joomla\CMS\MVC\Factory\MVCFactoryInterface;
use Joomla\CMS\Pagination\Pagination;
use Joomla\Database\DatabaseQuery;
/**
* Model class for handling lists of items.
*
* @since 1.6
*/
class ListModel extends BaseDatabaseModel implements ListModelInterface
{
use FormBehaviorTrait;
use FormFactoryAwareTrait;
/**
* Internal memory based cache array of data.
*
* @var array
* @since 1.6
*/
protected $cache = array();
/**
* Context string for the model type. This is used to handle uniqueness
* when dealing with the getStoreId() method and caching data structures.
*
* @var string
* @since 1.6
*/
protected $context = null;
/**
* Valid filter fields or ordering.
*
* @var array
* @since 1.6
*/
protected $filter_fields = array();
/**
* An internal cache for the last query used.
*
* @var DatabaseQuery[]
* @since 1.6
*/
protected $query = array();
/**
* Name of the filter form to load
*
* @var string
* @since 3.2
*/
protected $filterFormName = null;
/**
* Associated HTML form
*
* @var string
* @since 3.2
*/
protected $htmlFormName = 'adminForm';
/**
* A list of filter variables to not merge into the model's state
*
* @var array
* @since 3.4.5
* @deprecated 4.0.0 use $filterForbiddenList instead
*/
protected $filterBlacklist = array();
/**
* A list of forbidden filter variables to not merge into the model's state
*
* @var array
* @since 4.0.0
*/
protected $filterForbiddenList = array();
/**
* A list of forbidden variables to not merge into the model's state
*
* @var array
* @since 3.4.5
* @deprecated 4.0.0 use $listForbiddenList instead
*/
protected $listBlacklist = array('select');
/**
* A list of forbidden variables to not merge into the model's state
*
* @var array
* @since 4.0.0
*/
protected $listForbiddenList = array('select');
/**
* Constructor
*
* @param array $config An array of configuration options (name, state, dbo, table_path, ignore_request).
* @param MVCFactoryInterface $factory The factory.
*
* @since 1.6
* @throws Exception
*/
public function __construct($config = array(), MVCFactoryInterface $factory = null)
{
parent::__construct($config, $factory);
// Add the ordering filtering fields allowed list.
if (isset($config['filter_fields']))
{
$this->filter_fields = $config['filter_fields'];
}
// Guess the context as Option.ModelName.
if (empty($this->context))
{
$this->context = strtolower($this->option . '.' . $this->getName());
}
// @deprecated in 4.0 remove in Joomla 5.0
if (!empty($this->filterBlacklist))
{
$this->filterForbiddenList = array_merge($this->filterBlacklist, $this->filterForbiddenList);
}
// @deprecated in 4.0 remove in Joomla 5.0
if (!empty($this->listBlacklist))
{
$this->listForbiddenList = array_merge($this->listBlacklist, $this->listForbiddenList);
}
}
/**
* Provide a query to be used to evaluate if this is an Empty State, can be overridden in the model to provide granular control.
*
* @return DatabaseQuery
*
* @since 4.0.0
*/
protected function getEmptyStateQuery()
{
$query = clone $this->_getListQuery();
if ($query instanceof DatabaseQuery)
{
$query->clear('bounded')
->clear('group')
->clear('having')
->clear('join')
->clear('values')
->clear('where');
}
return $query;
}
/**
* Is this an empty state, I.e: no items of this type regardless of the searched for states.
*
* @return boolean
*
* @throws Exception
*
* @since 4.0.0
*/
public function getIsEmptyState(): bool
{
return $this->_getListCount($this->getEmptyStateQuery()) === 0;
}
/**
* Method to cache the last query constructed.
*
* This method ensures that the query is constructed only once for a given state of the model.
*
* @return DatabaseQuery A DatabaseQuery object
*
* @since 1.6
*/
protected function _getListQuery()
{
// Capture the last store id used.
static $lastStoreId;
// Compute the current store id.
$currentStoreId = $this->getStoreId();
// If the last store id is different from the current, refresh the query.
if ($lastStoreId != $currentStoreId || empty($this->query))
{
$lastStoreId = $currentStoreId;
$this->query = $this->getListQuery();
}
return $this->query;
}
/**
* Function to get the active filters
*
* @return array Associative array in the format: array('filter_published' => 0)
*
* @since 3.2
*/
public function getActiveFilters()
{
$activeFilters = array();
if (!empty($this->filter_fields))
{
foreach ($this->filter_fields as $filter)
{
$filterName = 'filter.' . $filter;
if (property_exists($this->state, $filterName) && (!empty($this->state->{$filterName}) || is_numeric($this->state->{$filterName})))
{
$activeFilters[$filter] = $this->state->get($filterName);
}
}
}
return $activeFilters;
}
/**
* Method to get an array of data items.
*
* @return mixed An array of data items on success, false on failure.
*
* @since 1.6
*/
public function getItems()
{
// Get a storage key.
$store = $this->getStoreId();
// Try to load the data from internal storage.
if (isset($this->cache[$store]))
{
return $this->cache[$store];
}
try
{
// Load the list items and add the items to the internal cache.
$this->cache[$store] = $this->_getList($this->_getListQuery(), $this->getStart(), $this->getState('list.limit'));
}
catch (\RuntimeException $e)
{
$this->setError($e->getMessage());
return false;
}
return $this->cache[$store];
}
/**
* Method to get a DatabaseQuery object for retrieving the data set from a database.
*
* @return DatabaseQuery A DatabaseQuery object to retrieve the data set.
*
* @since 1.6
*/
protected function getListQuery()
{
return $this->getDbo()->getQuery(true);
}
/**
* Method to get a \JPagination object for the data set.
*
* @return Pagination A Pagination object for the data set.
*
* @since 1.6
*/
public function getPagination()
{
// Get a storage key.
$store = $this->getStoreId('getPagination');
// Try to load the data from internal storage.
if (isset($this->cache[$store]))
{
return $this->cache[$store];
}
$limit = (int) $this->getState('list.limit') - (int) $this->getState('list.links');
// Create the pagination object and add the object to the internal cache.
$this->cache[$store] = new Pagination($this->getTotal(), $this->getStart(), $limit);
return $this->cache[$store];
}
/**
* 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 $id An identifier string to generate the store id.
*
* @return string A store id.
*
* @since 1.6
*/
protected function getStoreId($id = '')
{
// Add the list state to the store id.
$id .= ':' . $this->getState('list.start');
$id .= ':' . $this->getState('list.limit');
$id .= ':' . $this->getState('list.ordering');
$id .= ':' . $this->getState('list.direction');
return md5($this->context . ':' . $id);
}
/**
* Method to get the total number of items for the data set.
*
* @return integer The total number of items available in the data set.
*
* @since 1.6
*/
public function getTotal()
{
// Get a storage key.
$store = $this->getStoreId('getTotal');
// Try to load the data from internal storage.
if (isset($this->cache[$store]))
{
return $this->cache[$store];
}
try
{
// Load the total and add the total to the internal cache.
$this->cache[$store] = (int) $this->_getListCount($this->_getListQuery());
}
catch (\RuntimeException $e)
{
$this->setError($e->getMessage());
return false;
}
return $this->cache[$store];
}
/**
* Method to get the starting number of items for the data set.
*
* @return integer The starting number of items available in the data set.
*
* @since 1.6
*/
public function getStart()
{
$store = $this->getStoreId('getstart');
// Try to load the data from internal storage.
if (isset($this->cache[$store]))
{
return $this->cache[$store];
}
$start = $this->getState('list.start');
if ($start > 0)
{
$limit = $this->getState('list.limit');
$total = $this->getTotal();
if ($start > $total - $limit)
{
$start = max(0, (int) (ceil($total / $limit) - 1) * $limit);
}
}
// Add the total to the internal cache.
$this->cache[$store] = $start;
return $this->cache[$store];
}
/**
* Get the filter form
*
* @param array $data data
* @param boolean $loadData load current data
*
* @return Form|null The \JForm object or null if the form can't be found
*
* @since 3.2
*/
public function getFilterForm($data = array(), $loadData = true)
{
// Try to locate the filter form automatically. Example: ContentModelArticles => "filter_articles"
if (empty($this->filterFormName))
{
$classNameParts = explode('Model', \get_called_class());
if (\count($classNameParts) >= 2)
{
$this->filterFormName = 'filter_' . str_replace('\\', '', strtolower($classNameParts[1]));
}
}
if (empty($this->filterFormName))
{
return null;
}
try
{
// Get the form.
return $this->loadForm($this->context . '.filter', $this->filterFormName, array('control' => '', 'load_data' => $loadData));
}
catch (\RuntimeException $e)
{
}
return null;
}
/**
* Method to get the data that should be injected in the form.
*
* @return mixed The data for the form.
*
* @since 3.2
*/
protected function loadFormData()
{
// Check the session for previously entered form data.
$data = Factory::getApplication()->getUserState($this->context, new \stdClass);
// Pre-fill the list options
if (!property_exists($data, 'list'))
{
$data->list = array(
'direction' => $this->getState('list.direction'),
'limit' => $this->getState('list.limit'),
'ordering' => $this->getState('list.ordering'),
'start' => $this->getState('list.start'),
);
}
return $data;
}
/**
* 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 $direction An optional direction (asc|desc).
*
* @return void
*
* @since 1.6
*/
protected function populateState($ordering = null, $direction = null)
{
// If the context is set, assume that stateful lists are used.
if ($this->context)
{
$app = Factory::getApplication();
$inputFilter = InputFilter::getInstance();
// Receive & set filters
if ($filters = $app->getUserStateFromRequest($this->context . '.filter', 'filter', array(), 'array'))
{
foreach ($filters as $name => $value)
{
// Exclude if forbidden
if (!\in_array($name, $this->filterForbiddenList))
{
$this->setState('filter.' . $name, $value);
}
}
}
$limit = 0;
// Receive & set list options
if ($list = $app->getUserStateFromRequest($this->context . '.list', 'list', array(), 'array'))
{
foreach ($list as $name => $value)
{
// Exclude if forbidden
if (!\in_array($name, $this->listForbiddenList))
{
// Extra validations
switch ($name)
{
case 'fullordering':
$orderingParts = explode(' ', $value);
if (\count($orderingParts) >= 2)
{
// Latest part will be considered the direction
$fullDirection = end($orderingParts);
if (\in_array(strtoupper($fullDirection), array('ASC', 'DESC', '')))
{
$this->setState('list.direction', $fullDirection);
}
else
{
$this->setState('list.direction', $direction);
// Fallback to the default value
$value = $ordering . ' ' . $direction;
}
unset($orderingParts[\count($orderingParts) - 1]);
// The rest will be the ordering
$fullOrdering = implode(' ', $orderingParts);
if (\in_array($fullOrdering, $this->filter_fields))
{
$this->setState('list.ordering', $fullOrdering);
}
else
{
$this->setState('list.ordering', $ordering);
// Fallback to the default value
$value = $ordering . ' ' . $direction;
}
}
else
{
$this->setState('list.ordering', $ordering);
$this->setState('list.direction', $direction);
// Fallback to the default value
$value = $ordering . ' ' . $direction;
}
break;
case 'ordering':
if (!\in_array($value, $this->filter_fields))
{
$value = $ordering;
}
break;
case 'direction':
if (!\in_array(strtoupper($value), array('ASC', 'DESC', '')))
{
$value = $direction;
}
break;
case 'limit':
$value = $inputFilter->clean($value, 'int');
$limit = $value;
break;
case 'select':
$explodedValue = explode(',', $value);
foreach ($explodedValue as &$field)
{
$field = $inputFilter->clean($field, 'cmd');
}
$value = implode(',', $explodedValue);
break;
}
$this->setState('list.' . $name, $value);
}
}
}
else
// Keep B/C for components previous to jform forms for filters
{
// Pre-fill the limits
$limit = $app->getUserStateFromRequest('global.list.limit', 'limit', $app->get('list_limit'), 'uint');
$this->setState('list.limit', $limit);
// Check if the ordering field is in the allowed list, otherwise use the incoming value.
$value = $app->getUserStateFromRequest($this->context . '.ordercol', 'filter_order', $ordering);
if (!\in_array($value, $this->filter_fields))
{
$value = $ordering;
$app->setUserState($this->context . '.ordercol', $value);
}
$this->setState('list.ordering', $value);
// Check if the ordering direction is valid, otherwise use the incoming value.
$value = $app->getUserStateFromRequest($this->context . '.orderdirn', 'filter_order_Dir', $direction);
if (!\in_array(strtoupper($value), array('ASC', 'DESC', '')))
{
$value = $direction;
$app->setUserState($this->context . '.orderdirn', $value);
}
$this->setState('list.direction', $value);
}
// Support old ordering field
$oldOrdering = $app->input->get('filter_order');
if (!empty($oldOrdering) && \in_array($oldOrdering, $this->filter_fields))
{
$this->setState('list.ordering', $oldOrdering);
}
// Support old direction field
$oldDirection = $app->input->get('filter_order_Dir');
if (!empty($oldDirection) && \in_array(strtoupper($oldDirection), array('ASC', 'DESC', '')))
{
$this->setState('list.direction', $oldDirection);
}
$value = $app->getUserStateFromRequest($this->context . '.limitstart', 'limitstart', 0, 'int');
$limitstart = ($limit != 0 ? (floor($value / $limit) * $limit) : 0);
$this->setState('list.start', $limitstart);
}
else
{
$this->setState('list.start', 0);
$this->setState('list.limit', 0);
}
}
/**
* Gets the value of a user state variable and sets it in the session
*
* This is the same as the method in \JApplication except that this also can optionally
* force you back to the first page when a filter has changed
*
* @param string $key The key of the user state variable.
* @param string $request The name of the variable passed in a request.
* @param string $default The default value for the variable if not found. Optional.
* @param string $type Filter for the variable, for valid values see {@link InputFilter::clean()}. Optional.
* @param boolean $resetPage If true, the limitstart in request is set to zero
*
* @return mixed The request user state.
*
* @since 1.6
*/
public function getUserStateFromRequest($key, $request, $default = null, $type = 'none', $resetPage = true)
{
$app = Factory::getApplication();
$input = $app->input;
$old_state = $app->getUserState($key);
$cur_state = $old_state ?? $default;
$new_state = $input->get($request, null, $type);
// BC for Search Tools which uses different naming
if ($new_state === null && strpos($request, 'filter_') === 0)
{
$name = substr($request, 7);
$filters = $app->input->get('filter', array(), 'array');
if (isset($filters[$name]))
{
$new_state = $filters[$name];
}
}
if ($cur_state != $new_state && $new_state !== null && $resetPage)
{
$input->set('limitstart', 0);
}
// Save the new value only if it is set in this request.
if ($new_state !== null)
{
$app->setUserState($key, $new_state);
}
else
{
$new_state = $cur_state;
}
return $new_state;
}
/**
* Parse and transform the search string into a string fit for regex-ing arbitrary strings against
*
* @param string $search The search string
* @param string $regexDelimiter The regex delimiter to use for the quoting
*
* @return string Search string escaped for regex
*
* @since 3.4
*/
protected function refineSearchStringToRegex($search, $regexDelimiter = '/')
{
$searchArr = explode('|', trim($search, ' |'));
foreach ($searchArr as $key => $searchString)
{
if (trim($searchString) === '')
{
unset($searchArr[$key]);
continue;
}
$searchArr[$key] = str_replace(' ', '.*', preg_quote(trim($searchString), $regexDelimiter));
}
return implode('|', $searchArr);
}
}