<?php
/**
 * @copyright	Copyright (C) 2005 - 2012 Open Source Matters, Inc. All rights reserved.
 * @license		GNU General Public License version 2 or later; see LICENSE.txt
 */

// No direct access.
defined('_JEXEC') or die;

jimport('joomla.application.component.modeladmin');

/**
 * Newsfeed model.
 *
 * @package		Joomla.Administrator
 * @subpackage	com_newsfeeds
 * @since		1.6
 */
class NewsfeedsModelNewsfeed extends JModelAdmin
{
	/**
	 * @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;

		$table = $this->getTable();
		$i = 0;

		// Check that the category exists
		if ($categoryId)
		{
			$categoryTable = JTable::getInstance('Category');
			if (!$categoryTable->load($categoryId))
			{
				if ($error = $categoryTable->getError())
				{
					// Fatal error
					$this->setError($error);
					return false;
				}
				else
				{
					$this->setError(JText::_('JLIB_APPLICATION_ERROR_BATCH_MOVE_CATEGORY_NOT_FOUND'));
					return false;
				}
			}
		}

		if (empty($categoryId))
		{
			$this->setError(JText::_('JLIB_APPLICATION_ERROR_BATCH_MOVE_CATEGORY_NOT_FOUND'));
			return false;
		}

		// Check that the user has create permission for the component
		$user = JFactory::getUser();
		if (!$user->authorise('core.create', 'com_newsfeeds.category.' . $categoryId))
		{
			$this->setError(JText::_('JLIB_APPLICATION_ERROR_BATCH_CANNOT_CREATE'));
			return false;
		}

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

			$table->reset();

			// Check that the row actually exists
			if (!$table->load($pk))
			{
				if ($error = $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, $table->alias, $table->name);
			$table->name = $data['0'];
			$table->alias = $data['1'];

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

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

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

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

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

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

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

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

		return $newIds;
	}

	/**
	 * Method to test whether a record can be deleted.
	 *
	 * @param	object	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 ;
			}
			$user = JFactory::getUser();

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

	/**
	 * Method to test whether a record can have its state changed.
	 *
	 * @param	object	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	type	The table type to instantiate
	 * @param	string	A prefix for the table class name. Optional.
	 * @param	array	Configuration array for model. Optional.
	 * @return	JTable	A database object
	*/
	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', JRequest::getInt('catid', $app->getUserState('com_newsfeeds.newsfeeds.filter.category_id')));
			}
		}

		return $data;
	}

	/**
	 * Method to get a single record.
	 *
	 * @param	integer	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 JRegistry;
			$registry->loadString($item->metadata);
			$item->metadata = $registry->toArray();
		}

		return $item;
	}

	/**
	 * Prepare and sanitise the table prior to saving.
	 */
	protected function prepareTable(&$table)
	{
		$date = JFactory::getDate();
		$user = JFactory::getUser();

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

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

		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 = JFactory::getDbo();
				$db->setQuery('SELECT MAX(ordering) FROM #__newsfeeds');
				$max = $db->loadResult();

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

	/**
	 * Method to change the published state of one or more records.
	 *
	 * @param	array	$pks	A list of the primary keys to change.
	 * @param	int		$value	The value of the published state.
	 *
	 * @return	boolean	True on success.
	 * @since	1.6
	 */
	function publish(&$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	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;
	}
}
