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<?php
/**
 * @package     Joomla.Site
 * @subpackage  com_contact
 *
 * @copyright   (C) 2006 Open Source Matters, Inc. <https://www.joomla.org>
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\Component\Contact\Site\Model;

\defined('_JEXEC') or die;

use Joomla\CMS\Application\SiteApplication;
use Joomla\CMS\Component\ComponentHelper;
use Joomla\CMS\Factory;
use Joomla\CMS\Form\Form;
use Joomla\CMS\Helper\TagsHelper;
use Joomla\CMS\Language\Multilanguage;
use Joomla\CMS\Language\Text;
use Joomla\CMS\MVC\Model\FormModel;
use Joomla\CMS\Plugin\PluginHelper;
use Joomla\Database\ParameterType;
use Joomla\Database\QueryInterface;
use Joomla\Registry\Registry;

/**
 * Single item model for a contact
 *
 * @package     Joomla.Site
 * @subpackage  com_contact
 * @since       1.5
 */
class ContactModel extends FormModel
{
	/**
	 * The name of the view for a single item
	 *
	 * @var    string
	 * @since  1.6
	 */
	protected $view_item = 'contact';

/**
	 * A loaded item
	 *
	 * @var    \stdClass
	 * @since  1.6
	 */
	protected $_item = null;

/**
	 * Model context string.
	 *
	 * @var		string
	 */
	protected $_context = 'com_contact.contact';

/**
	 * Method to auto-populate the model state.
	 *
	 * Note. Calling getState in this method will result in recursion.
	 *
	 * @return  void
	 *
	 * @since   1.6
	 */
	protected function populateState()
	{
		/** @var SiteApplication $app */
		$app = Factory::getContainer()->get(SiteApplication::class);

if (Factory::getApplication()->isClient('api'))
		{
			// TODO: remove this
			$app->loadLanguage();
			$this->setState('contact.id', Factory::getApplication()->input->post->getInt('id'));
		}
		else
		{
			$this->setState('contact.id', $app->input->getInt('id'));
		}

$this->setState('params', $app->getParams());

$user = Factory::getUser();

if ((!$user->authorise('core.edit.state', 'com_contact')) &&  (!$user->authorise('core.edit', 'com_contact')))
		{
			$this->setState('filter.published', 1);
			$this->setState('filter.archived', 2);
		}
	}

/**
	 * Method to get the contact form.
	 * The base form is loaded from XML and then an event is fired
	 *
	 * @param   array    $data      An optional array of data for the form to interrogate.
	 * @param   boolean  $loadData  True if the form is to load its own data (default case), false if not.
	 *
	 * @return  Form  A Form object on success, false on failure
	 *
	 * @since   1.6
	 */
	public function getForm($data = array(), $loadData = true)
	{
		$form = $this->loadForm('com_contact.contact', 'contact', array('control' => 'jform', 'load_data' => true));

if (empty($form))
		{
			return false;
		}

$temp = clone $this->getState('params');
		$contact = $this->_item[$this->getState('contact.id')];
		$active = Factory::getContainer()->get(SiteApplication::class)->getMenu()->getActive();

if ($active)
		{
			// If the current view is the active item and a contact view for this contact, then the menu item params take priority
			if (strpos($active->link, 'view=contact') && strpos($active->link, '&id=' . (int) $contact->id))
			{
				// $contact->params are the contact params, $temp are the menu item params
				// Merge so that the menu item params take priority
				$contact->params->merge($temp);
			}
			else
			{
				// Current view is not a single contact, so the contact params take priority here
				// Merge the menu item params with the contact params so that the contact params take priority
				$temp->merge($contact->params);
				$contact->params = $temp;
			}
		}
		else
		{
			// Merge so that contact params take priority
			$temp->merge($contact->params);
			$contact->params = $temp;
		}

if (!$contact->params->get('show_email_copy', 0))
		{
			$form->removeField('contact_email_copy');
		}

return $form;
	}

/**
	 * Method to get the data that should be injected in the form.
	 *
	 * @return  array    The default data is an empty array.
	 *
	 * @since   1.6.2
	 */
	protected function loadFormData()
	{
		$data = (array) Factory::getApplication()->getUserState('com_contact.contact.data', array());

if (empty($data['language']) && Multilanguage::isEnabled())
		{
			$data['language'] = Factory::getLanguage()->getTag();
		}

// Add contact id to contact form data, so fields plugin can work properly
		if (empty($data['catid']))
		{
			$data['catid'] = $this->getItem()->catid;
		}

$this->preprocessData('com_contact.contact', $data);

return $data;
	}

/**
	 * Gets a contact
	 *
	 * @param   integer  $pk  Id for the contact
	 *
	 * @return  mixed Object or null
	 *
	 * @since   1.6.0
	 */
	public function getItem($pk = null)
	{
		$pk = $pk ?: (int) $this->getState('contact.id');

if ($this->_item === null)
		{
			$this->_item = array();
		}

if (!isset($this->_item[$pk]))
		{
			try
			{
				$db    = $this->getDbo();
				$query = $db->getQuery(true);

$query->select($this->getState('item.select', 'a.*'))
					->select($this->getSlugColumn($query, 'a.id', 'a.alias') . ' AS slug')
					->select($this->getSlugColumn($query, 'c.id', 'c.alias') . ' AS catslug')
					->from($db->quoteName('#__contact_details', 'a'))

// Join on category table.
					->select('c.title AS category_title, c.alias AS category_alias, c.access AS category_access')
					->leftJoin($db->quoteName('#__categories', 'c'), 'c.id = a.catid')

// Join over the categories to get parent category titles
					->select('parent.title AS parent_title, parent.id AS parent_id, parent.path AS parent_route, parent.alias AS parent_alias')
					->leftJoin($db->quoteName('#__categories', 'parent'), 'parent.id = c.parent_id')
					->where($db->quoteName('a.id') . ' = :id')
					->bind(':id', $pk, ParameterType::INTEGER);

// Filter by start and end dates.
				$nowDate = Factory::getDate()->toSql();

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

if (is_numeric($published))
				{
					$queryString = $db->quoteName('a.published') . ' = :published';

if ($archived !== null)
					{
						$queryString = '(' . $queryString . ' OR ' . $db->quoteName('a.published') . ' = :archived)';
						$query->bind(':archived', $archived, ParameterType::INTEGER);
					}

$query->where($queryString)
						->where('(' . $db->quoteName('a.publish_up') . ' IS NULL OR ' . $db->quoteName('a.publish_up') . ' <= :publish_up)')
						->where('(' . $db->quoteName('a.publish_down') . ' IS NULL OR ' . $db->quoteName('a.publish_down') . ' >= :publish_down)')
						->bind(':published', $published, ParameterType::INTEGER)
						->bind(':publish_up', $nowDate)
						->bind(':publish_down', $nowDate);
				}

$db->setQuery($query);
				$data = $db->loadObject();

if (empty($data))
				{
					throw new \Exception(Text::_('COM_CONTACT_ERROR_CONTACT_NOT_FOUND'), 404);
				}

// Check for published state if filter set.
				if ((is_numeric($published) || is_numeric($archived)) && (($data->published != $published) && ($data->published != $archived)))
				{
					throw new \Exception(Text::_('COM_CONTACT_ERROR_CONTACT_NOT_FOUND'), 404);
				}

/**
				 * In case some entity params have been set to "use global", those are
				 * represented as an empty string and must be "overridden" by merging
				 * the component and / or menu params here.
				 */
				$registry = new Registry($data->params);

$data->params = clone $this->getState('params');
				$data->params->merge($registry);

$registry = new Registry($data->metadata);
				$data->metadata = $registry;

// Some contexts may not use tags data at all, so we allow callers to disable loading tag data
				if ($this->getState('load_tags', true))
				{
					$data->tags = new TagsHelper;
					$data->tags->getItemTags('com_contact.contact', $data->id);
				}

// Compute access permissions.
				if (($access = $this->getState('filter.access')))
				{
					// If the access filter has been set, we already know this user can view.
					$data->params->set('access-view', true);
				}
				else
				{
					// If no access filter is set, the layout takes some responsibility for display of limited information.
					$user = Factory::getUser();
					$groups = $user->getAuthorisedViewLevels();

if ($data->catid == 0 || $data->category_access === null)
					{
						$data->params->set('access-view', in_array($data->access, $groups));
					}
					else
					{
						$data->params->set('access-view', in_array($data->access, $groups) && in_array($data->category_access, $groups));
					}
				}

$this->_item[$pk] = $data;
			}
			catch (\Exception $e)
			{
				if ($e->getCode() == 404)
				{
					// Need to go through the error handler to allow Redirect to work.
					throw $e;
				}
				else
				{
					$this->setError($e);
					$this->_item[$pk] = false;
				}
			}
		}

if ($this->_item[$pk])
		{
			$this->buildContactExtendedData($this->_item[$pk]);
		}

return $this->_item[$pk];
	}

/**
	 * Load extended data (profile, articles) for a contact
	 *
	 * @param   object  $contact  The contact object
	 *
	 * @return  void
	 */
	protected function buildContactExtendedData($contact)
	{
		$db        = $this->getDbo();
		$nowDate   = Factory::getDate()->toSql();
		$user      = Factory::getUser();
		$groups    = $user->getAuthorisedViewLevels();
		$published = $this->getState('filter.published');
		$query     = $db->getQuery(true);

// If we are showing a contact list, then the contact parameters take priority
		// So merge the contact parameters with the merged parameters
		if ($this->getState('params')->get('show_contact_list'))
		{
			$this->getState('params')->merge($contact->params);
		}

// Get the com_content articles by the linked user
		if ((int) $contact->user_id && $this->getState('params')->get('show_articles'))
		{
			$query->select('a.id')
				->select('a.title')
				->select('a.state')
				->select('a.access')
				->select('a.catid')
				->select('a.created')
				->select('a.language')
				->select('a.publish_up')
				->select('a.introtext')
				->select('a.images')
				->select($this->getSlugColumn($query, 'a.id', 'a.alias') . ' AS slug')
				->select($this->getSlugColumn($query, 'c.id', 'c.alias') . ' AS catslug')
				->from($db->quoteName('#__content', 'a'))
				->leftJoin($db->quoteName('#__categories', 'c') . ' ON a.catid = c.id')
				->where($db->quoteName('a.created_by') . ' = :created_by')
				->whereIn($db->quoteName('a.access'), $groups)
				->bind(':created_by', $contact->user_id, ParameterType::INTEGER)
				->order('a.publish_up DESC');

// Filter per language if plugin published
			if (Multilanguage::isEnabled())
			{
				$language = [Factory::getLanguage()->getTag(), $db->quote('*')];
				$query->whereIn($db->quoteName('a.language'), $language, ParameterType::STRING);
			}

if (is_numeric($published))
			{
				$query->where('a.state IN (1,2)')
					->where('(' . $db->quoteName('a.publish_up') . ' IS NULL' .
						' OR ' . $db->quoteName('a.publish_up') . ' <= :now1)'
					)
					->where('(' . $db->quoteName('a.publish_down') . ' IS NULL' .
						' OR ' . $db->quoteName('a.publish_down') . ' >= :now2)'
					)
					->bind([':now1', ':now2'], $nowDate);
			}

// Number of articles to display from config/menu params
			$articles_display_num = $this->getState('params')->get('articles_display_num', 10);

// Use contact setting?
			if ($articles_display_num === 'use_contact')
			{
				$articles_display_num = $contact->params->get('articles_display_num', 10);

// Use global?
				if ((string) $articles_display_num === '')
				{
					$articles_display_num = ComponentHelper::getParams('com_contact')->get('articles_display_num', 10);
				}
			}

$query->setLimit((int) $articles_display_num);
			$db->setQuery($query);
			$contact->articles = $db->loadObjectList();
		}
		else
		{
			$contact->articles = null;
		}

// Get the profile information for the linked user
		$userModel = $this->bootComponent('com_users')->getMVCFactory()
			->createModel('User', 'Administrator', ['ignore_request' => true]);
		$data = $userModel->getItem((int) $contact->user_id);

PluginHelper::importPlugin('user');

// Get the form.
		Form::addFormPath(JPATH_SITE . '/components/com_users/forms');

$form = Form::getInstance('com_users.profile', 'profile');

// Trigger the form preparation event.
		Factory::getApplication()->triggerEvent('onContentPrepareForm', array($form, $data));

// Trigger the data preparation event.
		Factory::getApplication()->triggerEvent('onContentPrepareData', array('com_users.profile', $data));

// Load the data into the form after the plugins have operated.
		$form->bind($data);
		$contact->profile = $form;
	}

/**
	 * Generate column expression for slug or catslug.
	 *
	 * @param   QueryInterface  $query  Current query instance.
	 * @param   string          $id     Column id name.
	 * @param   string          $alias  Column alias name.
	 *
	 * @return  string
	 *
	 * @since   4.0.0
	 */
	private function getSlugColumn($query, $id, $alias)
	{
		return 'CASE WHEN '
			. $query->charLength($alias, '!=', '0')
			. ' THEN '
			. $query->concatenate(array($query->castAsChar($id), $alias), ':')
			. ' ELSE '
			. $query->castAsChar($id) . ' END';
	}

/**
	 * Increment the hit counter for the contact.
	 *
	 * @param   integer  $pk  Optional primary key of the contact to increment.
	 *
	 * @return  boolean  True if successful; false otherwise and internal error set.
	 *
	 * @since   3.0
	 */
	public function hit($pk = 0)
	{
		$input = Factory::getApplication()->input;
		$hitcount = $input->getInt('hitcount', 1);

if ($hitcount)
		{
			$pk = $pk ?: (int) $this->getState('contact.id');

$table = $this->getTable('Contact');
			$table->hit($pk);
		}

return true;
	}
}