<?php
/**
 * @package     Joomla.Administrator
 * @subpackage  com_content
 *
 * @copyright   Copyright (C) 2005 - 2018 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

defined('_JEXEC') or die;

/**
 * View to edit an article.
 *
 * @since  1.6
 */
class ContentViewArticle extends JViewLegacy
{
	/**
	 * The JForm object
	 *
	 * @var  JForm
	 */
	protected $form;

	/**
	 * The active item
	 *
	 * @var  object
	 */
	protected $item;

	/**
	 * The model state
	 *
	 * @var  object
	 */
	protected $state;

	/**
	 * The actions the user is authorised to perform
	 *
	 * @var  JObject
	 */
	protected $canDo;

	/**
	 * Execute and display a template script.
	 *
	 * @param   string  $tpl  The name of the template file to parse; automatically searches through the template paths.
	 *
	 * @return  mixed  A string if successful, otherwise an Error object.
	 *
	 * @since   1.6
	 */
	public function display($tpl = null)
	{
		if ($this->getLayout() == 'pagebreak')
		{
			return parent::display($tpl);
		}

		$this->form  = $this->get('Form');
		$this->item  = $this->get('Item');
		$this->state = $this->get('State');
		$this->canDo = JHelperContent::getActions('com_content', 'article', $this->item->id);

		// Check for errors.
		if (count($errors = $this->get('Errors')))
		{
			throw new Exception(implode("\n", $errors), 500);
		}

		// If we are forcing a language in modal (used for associations).
		if ($this->getLayout() === 'modal' && $forcedLanguage = JFactory::getApplication()->input->get('forcedLanguage', '', 'cmd'))
		{
			// Set the language field to the forcedLanguage and disable changing it.
			$this->form->setValue('language', null, $forcedLanguage);
			$this->form->setFieldAttribute('language', 'readonly', 'true');

			// Only allow to select categories with All language or with the forced language.
			$this->form->setFieldAttribute('catid', 'language', '*,' . $forcedLanguage);

			// Only allow to select tags with All language or with the forced language.
			$this->form->setFieldAttribute('tags', 'language', '*,' . $forcedLanguage);
		}

		$this->addToolbar();

		return parent::display($tpl);
	}

	/**
	 * Add the page title and toolbar.
	 *
	 * @return  void
	 *
	 * @since   1.6
	 */
	protected function addToolbar()
	{
		JFactory::getApplication()->input->set('hidemainmenu', true);
		$user       = JFactory::getUser();
		$userId     = $user->id;
		$isNew      = ($this->item->id == 0);
		$checkedOut = !($this->item->checked_out == 0 || $this->item->checked_out == $userId);

		// Built the actions for new and existing records.
		$canDo = $this->canDo;

		JToolbarHelper::title(
			JText::_('COM_CONTENT_PAGE_' . ($checkedOut ? 'VIEW_ARTICLE' : ($isNew ? 'ADD_ARTICLE' : 'EDIT_ARTICLE'))),
			'pencil-2 article-add'
		);

		// For new records, check the create permission.
		if ($isNew && (count($user->getAuthorisedCategories('com_content', 'core.create')) > 0))
		{
			JToolbarHelper::apply('article.apply');
			JToolbarHelper::save('article.save');
			JToolbarHelper::save2new('article.save2new');
			JToolbarHelper::cancel('article.cancel');
		}
		else
		{
			// Since it's an existing record, check the edit permission, or fall back to edit own if the owner.
			$itemEditable = $canDo->get('core.edit') || ($canDo->get('core.edit.own') && $this->item->created_by == $userId);

			// Can't save the record if it's checked out and editable
			if (!$checkedOut && $itemEditable)
			{
				JToolbarHelper::apply('article.apply');
				JToolbarHelper::save('article.save');

				// We can save this record, but check the create permission to see if we can return to make a new one.
				if ($canDo->get('core.create'))
				{
					JToolbarHelper::save2new('article.save2new');
				}
			}

			// If checked out, we can still save
			if ($canDo->get('core.create'))
			{
				JToolbarHelper::save2copy('article.save2copy');
			}

			if (JComponentHelper::isEnabled('com_contenthistory') && $this->state->params->get('save_history', 0) && $itemEditable)
			{
				JToolbarHelper::versions('com_content.article', $this->item->id);
			}

			if (JLanguageAssociations::isEnabled() && JComponentHelper::isEnabled('com_associations'))
			{
				JToolbarHelper::custom('article.editAssociations', 'contract', 'contract', 'JTOOLBAR_ASSOCIATIONS', false, false);
			}

			JToolbarHelper::cancel('article.cancel', 'JTOOLBAR_CLOSE');
		}

		JToolbarHelper::divider();
		JToolbarHelper::help('JHELP_CONTENT_ARTICLE_MANAGER_EDIT');
	}
}
