<?php
/**
 * @package     Joomla.Administrator
 * @subpackage  com_newsfeeds
 *
 * @copyright   Copyright (C) 2005 - 2017 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

defined('_JEXEC') or die;

use Joomla\Registry\Registry;
use Joomla\String\StringHelper;

JLoader::register('NewsfeedsHelper', JPATH_ADMINISTRATOR . '/components/com_newsfeeds/helpers/newsfeeds.php');

/**
 * Newsfeed model.
 *
 * @since  1.6
 */
class NewsfeedsModelNewsfeed extends JModelAdmin
{
	/**
	 * The type alias for this content type.
	 *
	 * @var      string
	 * @since    3.2
	 */
	public $typeAlias = 'com_newsfeeds.newsfeed';

	/**
	 * The context used for the associations table
	 *
	 * @var string
	 * @since    3.4.4
	 */
	protected $associationsContext = 'com_newsfeeds.item';

	/**
	 * @var     string    The prefix to use with controller messages.
	 * @since   1.6
	 */
	protected $text_prefix = 'COM_NEWSFEEDS';

	/**
	 * Batch copy items to a new category or current.
	 *
	 * @param   integer  $value     The new category.
	 * @param   array    $pks       An array of row IDs.
	 * @param   array    $contexts  An array of item contexts.
	 *
	 * @return  mixed  An array of new IDs on success, boolean false on failure.
	 *
	 * @since   11.1
	 */
	protected function batchCopy($value, $pks, $contexts)
	{
		$categoryId = (int) $value;

		$newIds = array();

		if (!parent::checkCategoryId($categoryId))
		{
			return false;
		}

		// Parent exists so we let's proceed
		while (!empty($pks))
		{
			// Pop the first ID off the stack
			$pk = array_shift($pks);

			$this->table->reset();

			// Check that the row actually exists
			if (!$this->table->load($pk))
			{
				if ($error = $this->table->getError())
				{
					// Fatal error
					$this->setError($error);

					return false;
				}
				else
				{
					// Not fatal error
					$this->setError(JText::sprintf('JLIB_APPLICATION_ERROR_BATCH_MOVE_ROW_NOT_FOUND', $pk));
					continue;
				}
			}

			// Alter the title & alias
			$data = $this->generateNewTitle($categoryId, $this->table->alias, $this->table->name);
			$this->table->name = $data['0'];
			$this->table->alias = $data['1'];

			// Reset the ID because we are making a copy
			$this->table->id = 0;

			// Unpublish because we are making a copy
			$this->table->published = 0;

			// New category ID
			$this->table->catid = $categoryId;

			// TODO: Deal with ordering?
			// $this->table->ordering = 1;

			// Check the row.
			if (!$this->table->check())
			{
				$this->setError($this->table->getError());

				return false;
			}

			parent::createTagsHelper($this->tagsObserver, $this->type, $pk, $this->typeAlias, $this->table);

			// Store the row.
			if (!$this->table->store())
			{
				$this->setError($this->table->getError());

				return false;
			}

			// Get the new item ID
			$newId = $this->table->get('id');

			// Add the new ID to the array
			$newIds[$pk] = $newId;
		}

		// Clean the cache
		$this->cleanCache();

		return $newIds;
	}

	/**
	 * Method to test whether a record can be deleted.
	 *
	 * @param   object  $record  A record object.
	 *
	 * @return  boolean  True if allowed to delete the record. Defaults to the permission set in the component.
	 *
	 * @since   1.6
	 */
	protected function canDelete($record)
	{
		if (!empty($record->id))
		{
			if ($record->published != -2)
			{
				return false;
			}

			$user = JFactory::getUser();

			if (!empty($record->catid))
			{
				return $user->authorise('core.delete', 'com_newsfeed.category.' . (int) $record->catid);
			}
			else
			{
				return parent::canDelete($record);
			}
		}

		return false;
	}

	/**
	 * Method to test whether a record can have its state changed.
	 *
	 * @param   object  $record  A record object.
	 *
	 * @return  boolean  True if allowed to change the state of the record. Defaults to the permission set in the component.
	 *
	 * @since   1.6
	 */
	protected function canEditState($record)
	{
		$user = JFactory::getUser();

		if (!empty($record->catid))
		{
			return $user->authorise('core.edit.state', 'com_newsfeeds.category.' . (int) $record->catid);
		}
		else
		{
			return parent::canEditState($record);
		}
	}

	/**
	 * Returns a Table object, always creating it.
	 *
	 * @param   string  $type    The table type to instantiate
	 * @param   string  $prefix  A prefix for the table class name. Optional.
	 * @param   array   $config  Configuration array for model. Optional.
	 *
	 * @return  JTable    A database object
	 *
	 * @since   1.6
	 */
	public function getTable($type = 'Newsfeed', $prefix = 'NewsfeedsTable', $config = array())
	{
		return JTable::getInstance($type, $prefix, $config);
	}

	/**
	 * Method to get the record form.
	 *
	 * @param   array    $data      Data for the form.
	 * @param   boolean  $loadData  True if the form is to load its own data (default case), false if not.
	 *
	 * @return  JForm    A JForm object on success, false on failure
	 *
	 * @since   1.6
	 */
	public function getForm($data = array(), $loadData = true)
	{
		// Get the form.
		$form = $this->loadForm('com_newsfeeds.newsfeed', 'newsfeed', array('control' => 'jform', 'load_data' => $loadData));

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

		// Determine correct permissions to check.
		if ($this->getState('newsfeed.id'))
		{
			// Existing record. Can only edit in selected categories.
			$form->setFieldAttribute('catid', 'action', 'core.edit');
		}
		else
		{
			// New record. Can only create in selected categories.
			$form->setFieldAttribute('catid', 'action', 'core.create');
		}

		// Modify the form based on access controls.
		if (!$this->canEditState((object) $data))
		{
			// Disable fields for display.
			$form->setFieldAttribute('ordering', 'disabled', 'true');
			$form->setFieldAttribute('published', 'disabled', 'true');
			$form->setFieldAttribute('publish_up', 'disabled', 'true');
			$form->setFieldAttribute('publish_down', 'disabled', 'true');

			// Disable fields while saving.
			// The controller has already verified this is a record you can edit.
			$form->setFieldAttribute('ordering', 'filter', 'unset');
			$form->setFieldAttribute('published', 'filter', 'unset');
			$form->setFieldAttribute('publish_up', 'filter', 'unset');
			$form->setFieldAttribute('publish_down', 'filter', 'unset');
		}

		return $form;
	}

	/**
	 * Method to get the data that should be injected in the form.
	 *
	 * @return  mixed  The data for the form.
	 *
	 * @since   1.6
	 */
	protected function loadFormData()
	{
		// Check the session for previously entered form data.
		$data = JFactory::getApplication()->getUserState('com_newsfeeds.edit.newsfeed.data', array());

		if (empty($data))
		{
			$data = $this->getItem();

			// Prime some default values.
			if ($this->getState('newsfeed.id') == 0)
			{
				$app = JFactory::getApplication();
				$data->set('catid', $app->input->get('catid', $app->getUserState('com_newsfeeds.newsfeeds.filter.category_id'), 'int'));
			}
		}

		$this->preprocessData('com_newsfeeds.newsfeed', $data);

		return $data;
	}

	/**
	 * Method to save the form data.
	 *
	 * @param   array  $data  The form data.
	 *
	 * @return  boolean  True on success.
	 *
	 * @since   3.0
	 */
	public function save($data)
	{
		$input = JFactory::getApplication()->input;

		JLoader::register('CategoriesHelper', JPATH_ADMINISTRATOR . '/components/com_categories/helpers/categories.php');

		// Cast catid to integer for comparison
		$catid = (int) $data['catid'];

		// Check if New Category exists
		if ($catid > 0)
		{
			$catid = CategoriesHelper::validateCategoryId($data['catid'], 'com_newsfeeds');
		}

		// Save New Category
		if ($catid == 0 && $this->canCreateCategory())
		{
			$table = array();
			$table['title'] = $data['catid'];
			$table['parent_id'] = 1;
			$table['extension'] = 'com_newsfeeds';
			$table['language'] = $data['language'];
			$table['published'] = 1;

			// Create new category and get catid back
			$data['catid'] = CategoriesHelper::createCategory($table);
		}

		// Alter the name for save as copy
		if ($input->get('task') == 'save2copy')
		{
			$origTable = clone $this->getTable();
			$origTable->load($input->getInt('id'));

			if ($data['name'] == $origTable->name)
			{
				list($name, $alias) = $this->generateNewTitle($data['catid'], $data['alias'], $data['name']);
				$data['name'] = $name;
				$data['alias'] = $alias;
			}
			else
			{
				if ($data['alias'] == $origTable->alias)
				{
					$data['alias'] = '';
				}
			}

			$data['published'] = 0;
		}

		return parent::save($data);
	}

	/**
	 * Method to get a single record.
	 *
	 * @param   integer  $pk  The id of the primary key.
	 *
	 * @return  mixed  Object on success, false on failure.
	 *
	 * @since   1.6
	 */
	public function getItem($pk = null)
	{
		if ($item = parent::getItem($pk))
		{
			// Convert the params field to an array.
			$registry = new Registry($item->metadata);
			$item->metadata = $registry->toArray();

			// Convert the images field to an array.
			$registry = new Registry($item->images);
			$item->images = $registry->toArray();
		}

		// Load associated newsfeeds items
		$app = JFactory::getApplication();
		$assoc = JLanguageAssociations::isEnabled();

		if ($assoc)
		{
			$item->associations = array();

			if ($item->id != null)
			{
				$associations = JLanguageAssociations::getAssociations('com_newsfeeds', '#__newsfeeds', 'com_newsfeeds.item', $item->id);

				foreach ($associations as $tag => $association)
				{
					$item->associations[$tag] = $association->id;
				}
			}
		}

		if (!empty($item->id))
		{
			$item->tags = new JHelperTags;
			$item->tags->getTagIds($item->id, 'com_newsfeeds.newsfeed');
			$item->metadata['tags'] = $item->tags;
		}

		return $item;
	}

	/**
	 * Prepare and sanitise the table prior to saving.
	 *
	 * @param   JTable  $table  The table object
	 *
	 * @return  void
	 */
	protected function prepareTable($table)
	{
		$date = JFactory::getDate();
		$user = JFactory::getUser();

		$table->name = htmlspecialchars_decode($table->name, ENT_QUOTES);
		$table->alias = JApplicationHelper::stringURLSafe($table->alias, $table->language);

		if (empty($table->alias))
		{
			$table->alias = JApplicationHelper::stringURLSafe($table->name, $table->language);
		}

		if (empty($table->id))
		{
			// Set the values
			$table->created = $date->toSql();

			// Set ordering to the last item if not set
			if (empty($table->ordering))
			{
				$db = $this->getDbo();
				$query = $db->getQuery(true)
					->select('MAX(ordering)')
					->from($db->quoteName('#__newsfeeds'));
				$db->setQuery($query);
				$max = $db->loadResult();

				$table->ordering = $max + 1;
			}
		}
		else
		{
			// Set the values
			$table->modified = $date->toSql();
			$table->modified_by = $user->get('id');
		}

		// Increment the content version number.
		$table->version++;
	}

	/**
	 * Method to change the published state of one or more records.
	 *
	 * @param   array    &$pks   A list of the primary keys to change.
	 * @param   integer  $value  The value of the published state.
	 *
	 * @return  boolean  True on success.
	 *
	 * @since   1.6
	 */
	public function publish(&$pks, $value = 1)
	{
		$result = parent::publish($pks, $value);

		// Clean extra cache for newsfeeds
		$this->cleanCache('feed_parser');

		return $result;
	}

	/**
	 * A protected method to get a set of ordering conditions.
	 *
	 * @param   object  $table  A record object.
	 *
	 * @return  array  An array of conditions to add to add to ordering queries.
	 *
	 * @since   1.6
	 */
	protected function getReorderConditions($table)
	{
		$condition = array();
		$condition[] = 'catid = ' . (int) $table->catid;

		return $condition;
	}

	/**
	 * A protected method to get a set of ordering conditions.
	 *
	 * @param   JForm   $form   The form object.
	 * @param   array   $data   The data to be injected into the form
	 * @param   string  $group  The plugin group to process
	 *
	 * @return  array  An array of conditions to add to add to ordering queries.
	 *
	 * @since   1.6
	 */
	protected function preprocessForm(JForm $form, $data, $group = 'content')
	{
		if ($this->canCreateCategory())
		{
			$form->setFieldAttribute('catid', 'allowAdd', 'true');
		}

		// Association newsfeeds items
		if (JLanguageAssociations::isEnabled())
		{
			$languages = JLanguageHelper::getContentLanguages(false, true, null, 'ordering', 'asc');

			if (count($languages) > 1)
			{
				$addform = new SimpleXMLElement('<form />');
				$fields = $addform->addChild('fields');
				$fields->addAttribute('name', 'associations');
				$fieldset = $fields->addChild('fieldset');
				$fieldset->addAttribute('name', 'item_associations');

				foreach ($languages as $language)
				{
					$field = $fieldset->addChild('field');
					$field->addAttribute('name', $language->lang_code);
					$field->addAttribute('type', 'modal_newsfeed');
					$field->addAttribute('language', $language->lang_code);
					$field->addAttribute('label', $language->title);
					$field->addAttribute('translate_label', 'false');
					$field->addAttribute('select', 'true');
					$field->addAttribute('new', 'true');
					$field->addAttribute('edit', 'true');
					$field->addAttribute('clear', 'true');
				}

				$form->load($addform, false);
			}
		}

		parent::preprocessForm($form, $data, $group);
	}

	/**
	 * Method to change the title & alias.
	 *
	 * @param   integer  $category_id  The id of the parent.
	 * @param   string   $alias        The alias.
	 * @param   string   $name         The title.
	 *
	 * @return  array  Contains the modified title and alias.
	 *
	 * @since   3.1
	 */
	protected function generateNewTitle($category_id, $alias, $name)
	{
		// Alter the title & alias
		$table = $this->getTable();

		while ($table->load(array('alias' => $alias, 'catid' => $category_id)))
		{
			if ($name == $table->name)
			{
				$name = StringHelper::increment($name);
			}

			$alias = StringHelper::increment($alias, 'dash');
		}

		return array($name, $alias);
	}

	/**
	 * Is the user allowed to create an on the fly category?
	 *
	 * @return  boolean
	 *
	 * @since   3.6.1
	 */
	private function canCreateCategory()
	{
		return JFactory::getUser()->authorise('core.create', 'com_newsfeeds');
	}
}
