<?php
/*-------------------------------------------------------------------------------------------------------------|  www.vdm.io  |------/
 ____                                                  ____                 __               __               __
/\  _`\                                               /\  _`\   __         /\ \__         __/\ \             /\ \__
\ \,\L\_\     __   _ __    ___ ___     ___     ___    \ \ \/\ \/\_\    ____\ \ ,_\  _ __ /\_\ \ \____  __  __\ \ ,_\   ___   _ __
 \/_\__ \   /'__`\/\`'__\/' __` __`\  / __`\ /' _ `\   \ \ \ \ \/\ \  /',__\\ \ \/ /\`'__\/\ \ \ '__`\/\ \/\ \\ \ \/  / __`\/\`'__\
   /\ \L\ \/\  __/\ \ \/ /\ \/\ \/\ \/\ \L\ \/\ \/\ \   \ \ \_\ \ \ \/\__, `\\ \ \_\ \ \/ \ \ \ \ \L\ \ \ \_\ \\ \ \_/\ \L\ \ \ \/
   \ `\____\ \____\\ \_\ \ \_\ \_\ \_\ \____/\ \_\ \_\   \ \____/\ \_\/\____/ \ \__\\ \_\  \ \_\ \_,__/\ \____/ \ \__\ \____/\ \_\
    \/_____/\/____/ \/_/  \/_/\/_/\/_/\/___/  \/_/\/_/    \/___/  \/_/\/___/   \/__/ \/_/   \/_/\/___/  \/___/   \/__/\/___/  \/_/

/------------------------------------------------------------------------------------------------------------------------------------/

	@version		2.0.x
	@created		22nd October, 2015
	@package		Sermon Distributor
	@subpackage		help_documents.php
	@author			Llewellyn van der Merwe <https://www.vdm.io/>	
	@copyright		Copyright (C) 2015. All Rights Reserved
	@license		GNU/GPL Version 2 or later - http://www.gnu.org/licenses/gpl-2.0.html 

	A sermon distributor that links to Dropbox. 

/----------------------------------------------------------------------------------------------------------------------------------*/

// No direct access to this file
defined('_JEXEC') or die('Restricted access');

use Joomla\Utilities\ArrayHelper;

/**
 * Help_documents Model
 */
class SermondistributorModelHelp_documents extends JModelList
{
	public function __construct($config = array())
	{
		if (empty($config['filter_fields']))
        {
			$config['filter_fields'] = array(
				'a.id','id',
				'a.published','published',
				'a.access','access',
				'a.ordering','ordering',
				'a.created_by','created_by',
				'a.modified_by','modified_by',
				'a.type','type',
				'a.location','location',
				'a.admin_view','admin_view',
				'a.site_view','site_view',
				'a.title','title'
			);
		}

		parent::__construct($config);
	}

	/**
	 * 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  $direction  An optional direction (asc|desc).
	 *
	 * @return  void
	 *
	 */
	protected function populateState($ordering = null, $direction = null)
	{
		$app = JFactory::getApplication();

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

		// Check if the form was submitted
		$formSubmited = $app->input->post->get('form_submited');

		$access = $this->getUserStateFromRequest($this->context . '.filter.access', 'filter_access', 0, 'int');
		if ($formSubmited)
		{
			$access = $app->input->post->get('access');
			$this->setState('filter.access', $access);
		}

		$published = $this->getUserStateFromRequest($this->context . '.filter.published', 'filter_published', '');
		$this->setState('filter.published', $published);

		$created_by = $this->getUserStateFromRequest($this->context . '.filter.created_by', 'filter_created_by', '');
		$this->setState('filter.created_by', $created_by);

		$created = $this->getUserStateFromRequest($this->context . '.filter.created', 'filter_created');
		$this->setState('filter.created', $created);

		$sorting = $this->getUserStateFromRequest($this->context . '.filter.sorting', 'filter_sorting', 0, 'int');
		$this->setState('filter.sorting', $sorting);

		$search = $this->getUserStateFromRequest($this->context . '.filter.search', 'filter_search');
		$this->setState('filter.search', $search);

		$type = $this->getUserStateFromRequest($this->context . '.filter.type', 'filter_type');
		if ($formSubmited)
		{
			$type = $app->input->post->get('type');
			$this->setState('filter.type', $type);
		}

		$location = $this->getUserStateFromRequest($this->context . '.filter.location', 'filter_location');
		if ($formSubmited)
		{
			$location = $app->input->post->get('location');
			$this->setState('filter.location', $location);
		}

		$admin_view = $this->getUserStateFromRequest($this->context . '.filter.admin_view', 'filter_admin_view');
		if ($formSubmited)
		{
			$admin_view = $app->input->post->get('admin_view');
			$this->setState('filter.admin_view', $admin_view);
		}

		$site_view = $this->getUserStateFromRequest($this->context . '.filter.site_view', 'filter_site_view');
		if ($formSubmited)
		{
			$site_view = $app->input->post->get('site_view');
			$this->setState('filter.site_view', $site_view);
		}

		$title = $this->getUserStateFromRequest($this->context . '.filter.title', 'filter_title');
		if ($formSubmited)
		{
			$title = $app->input->post->get('title');
			$this->setState('filter.title', $title);
		}

		// List state information.
		parent::populateState($ordering, $direction);
	}
	
	/**
	 * Method to get an array of data items.
	 *
	 * @return  mixed  An array of data items on success, false on failure.
	 */
	public function getItems()
	{
		// Check in items
		$this->checkInNow();

		// load parent items
		$items = parent::getItems();

		// Set values to display correctly.
		if (SermondistributorHelper::checkArray($items))
		{
			// Get the user object if not set.
			if (!isset($user) || !SermondistributorHelper::checkObject($user))
			{
				$user = JFactory::getUser();
			}
			foreach ($items as $nr => &$item)
			{
				// Remove items the user can't access.
				$access = ($user->authorise('help_document.access', 'com_sermondistributor.help_document.' . (int) $item->id) && $user->authorise('help_document.access', 'com_sermondistributor'));
				if (!$access)
				{
					unset($items[$nr]);
					continue;
				}

				// decode groups
				$groupsArray = json_decode($item->groups, true);
				if (SermondistributorHelper::checkArray($groupsArray))
				{
					$groupsNames = array();
					foreach ($groupsArray as $groups)
					{
						$groupsNames[] = SermondistributorHelper::getGroupName($groups);
					}
					$item->groups =  implode(', ', $groupsNames);
				}
			}
		}

		// set selection value to a translatable value
		if (SermondistributorHelper::checkArray($items))
		{
			foreach ($items as $nr => &$item)
			{
				// convert type
				$item->type = $this->selectionTranslation($item->type, 'type');
				// convert location
				$item->location = $this->selectionTranslation($item->location, 'location');
			}
		}

        
		// return items
		return $items;
	}

	/**
	 * Method to convert selection values to translatable string.
	 *
	 * @return translatable string
	 */
	public function selectionTranslation($value,$name)
	{
		// Array of type language strings
		if ($name === 'type')
		{
			$typeArray = array(
				0 => 'COM_SERMONDISTRIBUTOR_HELP_DOCUMENT_SELECT_AN_OPTION',
				1 => 'COM_SERMONDISTRIBUTOR_HELP_DOCUMENT_JOOMLA_ARTICLE',
				2 => 'COM_SERMONDISTRIBUTOR_HELP_DOCUMENT_TEXT',
				3 => 'COM_SERMONDISTRIBUTOR_HELP_DOCUMENT_URL'
			);
			// Now check if value is found in this array
			if (isset($typeArray[$value]) && SermondistributorHelper::checkString($typeArray[$value]))
			{
				return $typeArray[$value];
			}
		}
		// Array of location language strings
		if ($name === 'location')
		{
			$locationArray = array(
				1 => 'COM_SERMONDISTRIBUTOR_HELP_DOCUMENT_ADMIN',
				2 => 'COM_SERMONDISTRIBUTOR_HELP_DOCUMENT_SITE'
			);
			// Now check if value is found in this array
			if (isset($locationArray[$value]) && SermondistributorHelper::checkString($locationArray[$value]))
			{
				return $locationArray[$value];
			}
		}
		return $value;
	}
	
	/**
	 * Method to build an SQL query to load the list data.
	 *
	 * @return	string	An SQL query
	 */
	protected function getListQuery()
	{
		// Get the user object.
		$user = JFactory::getUser();
		// Create a new query object.
		$db = JFactory::getDBO();
		$query = $db->getQuery(true);

		// Select some fields
		$query->select('a.*');

		// From the sermondistributor_item table
		$query->from($db->quoteName('#__sermondistributor_help_document', 'a'));

		// Filter by published state
		$published = $this->getState('filter.published');
		if (is_numeric($published))
		{
			$query->where('a.published = ' . (int) $published);
		}
		elseif ($published === '')
		{
			$query->where('(a.published = 0 OR a.published = 1)');
		}

		// Join over the asset groups.
		$query->select('ag.title AS access_level');
		$query->join('LEFT', '#__viewlevels AS ag ON ag.id = a.access');
		// Filter by access level.
		$_access = $this->getState('filter.access');
		if ($_access && is_numeric($_access))
		{
			$query->where('a.access = ' . (int) $_access);
		}
		elseif (SermondistributorHelper::checkArray($_access))
		{
			// Secure the array for the query
			$_access = ArrayHelper::toInteger($_access);
			// Filter by the Access Array.
			$query->where('a.access IN (' . implode(',', $_access) . ')');
		}
		// Implement View Level Access
		if (!$user->authorise('core.options', 'com_sermondistributor'))
		{
			$groups = implode(',', $user->getAuthorisedViewLevels());
			$query->where('a.access IN (' . $groups . ')');
		}
		// Filter by search.
		$search = $this->getState('filter.search');
		if (!empty($search))
		{
			if (stripos($search, 'id:') === 0)
			{
				$query->where('a.id = ' . (int) substr($search, 3));
			}
			else
			{
				$search = $db->quote('%' . $db->escape($search) . '%');
				$query->where('(a.title LIKE '.$search.' OR a.type LIKE '.$search.' OR a.location LIKE '.$search.' OR a.admin_view LIKE '.$search.' OR g. LIKE '.$search.' OR a.site_view LIKE '.$search.' OR h. LIKE '.$search.')');
			}
		}

		// Filter by Type.
		$_type = $this->getState('filter.type');
		if (is_numeric($_type))
		{
			if (is_float($_type))
			{
				$query->where('a.type = ' . (float) $_type);
			}
			else
			{
				$query->where('a.type = ' . (int) $_type);
			}
		}
		elseif (SermondistributorHelper::checkString($_type))
		{
			$query->where('a.type = ' . $db->quote($db->escape($_type)));
		}
		// Filter by Location.
		$_location = $this->getState('filter.location');
		if (is_numeric($_location))
		{
			if (is_float($_location))
			{
				$query->where('a.location = ' . (float) $_location);
			}
			else
			{
				$query->where('a.location = ' . (int) $_location);
			}
		}
		elseif (SermondistributorHelper::checkString($_location))
		{
			$query->where('a.location = ' . $db->quote($db->escape($_location)));
		}
		// Filter by Admin_view.
		$_admin_view = $this->getState('filter.admin_view');
		if (is_numeric($_admin_view))
		{
			if (is_float($_admin_view))
			{
				$query->where('a.admin_view = ' . (float) $_admin_view);
			}
			else
			{
				$query->where('a.admin_view = ' . (int) $_admin_view);
			}
		}
		elseif (SermondistributorHelper::checkString($_admin_view))
		{
			$query->where('a.admin_view = ' . $db->quote($db->escape($_admin_view)));
		}
		// Filter by Site_view.
		$_site_view = $this->getState('filter.site_view');
		if (is_numeric($_site_view))
		{
			if (is_float($_site_view))
			{
				$query->where('a.site_view = ' . (float) $_site_view);
			}
			else
			{
				$query->where('a.site_view = ' . (int) $_site_view);
			}
		}
		elseif (SermondistributorHelper::checkString($_site_view))
		{
			$query->where('a.site_view = ' . $db->quote($db->escape($_site_view)));
		}

		// Add the list ordering clause.
		$orderCol = $this->state->get('list.ordering', 'a.id');
		$orderDirn = $this->state->get('list.direction', 'desc');
		if ($orderCol != '')
		{
			$query->order($db->escape($orderCol . ' ' . $orderDirn));
		}

		return $query;
	}

	/**
	 * Method to get list export data.
	 *
	 * @param   array  $pks  The ids of the items to get
	 * @param   JUser  $user  The user making the request
	 *
	 * @return mixed  An array of data items on success, false on failure.
	 */
	public function getExportData($pks, $user = null)
	{
		// setup the query
		if (($pks_size = SermondistributorHelper::checkArray($pks)) !== false || 'bulk' === $pks)
		{
			// Set a value to know this is export method. (USE IN CUSTOM CODE TO ALTER OUTCOME)
			$_export = true;
			// Get the user object if not set.
			if (!isset($user) || !SermondistributorHelper::checkObject($user))
			{
				$user = JFactory::getUser();
			}
			// Create a new query object.
			$db = JFactory::getDBO();
			$query = $db->getQuery(true);

			// Select some fields
			$query->select('a.*');

			// From the sermondistributor_help_document table
			$query->from($db->quoteName('#__sermondistributor_help_document', 'a'));
			// The bulk export path
			if ('bulk' === $pks)
			{
				$query->where('a.id > 0');
			}
			// A large array of ID's will not work out well
			elseif ($pks_size > 500)
			{
				// Use lowest ID
				$query->where('a.id >= ' . (int) min($pks));
				// Use highest ID
				$query->where('a.id <= ' . (int) max($pks));
			}
			// The normal default path
			else
			{
				$query->where('a.id IN (' . implode(',',$pks) . ')');
			}
			// Implement View Level Access
			if (!$user->authorise('core.options', 'com_sermondistributor'))
			{
				$groups = implode(',', $user->getAuthorisedViewLevels());
				$query->where('a.access IN (' . $groups . ')');
			}

			// Order the results by ordering
			$query->order('a.ordering  ASC');

			// Load the items
			$db->setQuery($query);
			$db->execute();
			if ($db->getNumRows())
			{
				$items = $db->loadObjectList();

				// Set values to display correctly.
				if (SermondistributorHelper::checkArray($items))
				{
					foreach ($items as $nr => &$item)
					{
						// Remove items the user can't access.
						$access = ($user->authorise('help_document.access', 'com_sermondistributor.help_document.' . (int) $item->id) && $user->authorise('help_document.access', 'com_sermondistributor'));
						if (!$access)
						{
							unset($items[$nr]);
							continue;
						}

						// unset the values we don't want exported.
						unset($item->asset_id);
						unset($item->checked_out);
						unset($item->checked_out_time);
					}
				}
				// Add headers to items array.
				$headers = $this->getExImPortHeaders();
				if (SermondistributorHelper::checkObject($headers))
				{
					array_unshift($items,$headers);
				}
				return $items;
			}
		}
		return false;
	}

	/**
	* Method to get header.
	*
	* @return mixed  An array of data items on success, false on failure.
	*/
	public function getExImPortHeaders()
	{
		// Get a db connection.
		$db = JFactory::getDbo();
		// get the columns
		$columns = $db->getTableColumns("#__sermondistributor_help_document");
		if (SermondistributorHelper::checkArray($columns))
		{
			// remove the headers you don't import/export.
			unset($columns['asset_id']);
			unset($columns['checked_out']);
			unset($columns['checked_out_time']);
			$headers = new stdClass();
			foreach ($columns as $column => $type)
			{
				$headers->{$column} = $column;
			}
			return $headers;
		}
		return false;
	}
	
	/**
	 * Method to get a store id based on model configuration state.
	 *
	 * @return  string  A store id.
	 *
	 */
	protected function getStoreId($id = '')
	{
		// Compile the store id.
		$id .= ':' . $this->getState('filter.id');
		$id .= ':' . $this->getState('filter.search');
		$id .= ':' . $this->getState('filter.published');
		// Check if the value is an array
		$_access = $this->getState('filter.access');
		if (SermondistributorHelper::checkArray($_access))
		{
			$id .= ':' . implode(':', $_access);
		}
		// Check if this is only an number or string
		elseif (is_numeric($_access)
		 || SermondistributorHelper::checkString($_access))
		{
			$id .= ':' . $_access;
		}
		$id .= ':' . $this->getState('filter.ordering');
		$id .= ':' . $this->getState('filter.created_by');
		$id .= ':' . $this->getState('filter.modified_by');
		$id .= ':' . $this->getState('filter.type');
		$id .= ':' . $this->getState('filter.location');
		$id .= ':' . $this->getState('filter.admin_view');
		$id .= ':' . $this->getState('filter.site_view');
		$id .= ':' . $this->getState('filter.title');

		return parent::getStoreId($id);
	}

	/**
	 * Build an SQL query to checkin all items left checked out longer then a set time.
	 *
	 * @return  a bool
	 *
	 */
	protected function checkInNow()
	{
		// Get set check in time
		$time = JComponentHelper::getParams('com_sermondistributor')->get('check_in');

		if ($time)
		{

			// Get a db connection.
			$db = JFactory::getDbo();
			// Reset query.
			$query = $db->getQuery(true);
			$query->select('*');
			$query->from($db->quoteName('#__sermondistributor_help_document'));
			// Only select items that are checked out.
			$query->where($db->quoteName('checked_out') . '!=0');
			$db->setQuery($query, 0, 1);
			$db->execute();
			if ($db->getNumRows())
			{
				// Get Yesterdays date.
				$date = JFactory::getDate()->modify($time)->toSql();
				// Reset query.
				$query = $db->getQuery(true);

				// Fields to update.
				$fields = array(
					$db->quoteName('checked_out_time') . '=\'0000-00-00 00:00:00\'',
					$db->quoteName('checked_out') . '=0'
				);

				// Conditions for which records should be updated.
				$conditions = array(
					$db->quoteName('checked_out') . '!=0', 
					$db->quoteName('checked_out_time') . '<\''.$date.'\''
				);

				// Check table.
				$query->update($db->quoteName('#__sermondistributor_help_document'))->set($fields)->where($conditions); 

				$db->setQuery($query);

				$db->execute();
			}
		}

		return false;
	}
}