<?php

/**
 * @package     Joomla.Administrator
 * @subpackage  com_newsfeeds
 *
 * @copyright   (C) 2008 Open Source Matters, Inc. <https://www.joomla.org>
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\Component\Newsfeeds\Administrator\View\Newsfeeds;

use Joomla\CMS\Factory;
use Joomla\CMS\Helper\ContentHelper;
use Joomla\CMS\Language\Multilanguage;
use Joomla\CMS\Language\Text;
use Joomla\CMS\MVC\View\GenericDataException;
use Joomla\CMS\MVC\View\HtmlView as BaseHtmlView;
use Joomla\CMS\Object\CMSObject;
use Joomla\CMS\Toolbar\Toolbar;
use Joomla\CMS\Toolbar\ToolbarHelper;

/**
 * View class for a list of newsfeeds.
 *
 * @since  1.6
 */
class HtmlView extends BaseHtmlView
{
    /**
     * The list of newsfeeds
     *
     * @var    CMSObject
     *
     * @since  1.6
     */
    protected $items;

    /**
     * The pagination object
     *
     * @var    \Joomla\CMS\Pagination\Pagination
     *
     * @since  1.6
     */
    protected $pagination;

    /**
     * The model state
     *
     * @var    CMSObject
     *
     * @since  1.6
     */
    protected $state;

    /**
     * Is this view an Empty State
     *
     * @var    boolean
     *
     * @since  4.0.0
     */
    private $isEmptyState = false;

    /**
     * Execute and display a template script.
     *
     * @param   string  $tpl  The name of the template file to parse; automatically searches through the template paths.
     *
     * @return  void
     *
     * @since   1.6
     */
    public function display($tpl = null)
    {
        $this->items         = $this->get('Items');
        $this->pagination    = $this->get('Pagination');
        $this->state         = $this->get('State');
        $this->filterForm    = $this->get('FilterForm');
        $this->activeFilters = $this->get('ActiveFilters');

        if (!\count($this->items) && $this->isEmptyState = $this->get('IsEmptyState')) {
            $this->setLayout('emptystate');
        }

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

        // We don't need toolbar in the modal layout.
        if ($this->getLayout() !== 'modal') {
            $this->addToolbar();

            // We do not need to filter by language when multilingual is disabled
            if (!Multilanguage::isEnabled()) {
                unset($this->activeFilters['language']);
                $this->filterForm->removeField('language', 'filter');
            }
        } else {
            // In article associations modal we need to remove language filter if forcing a language.
            // We also need to change the category filter to show show categories with All or the forced language.
            if ($forcedLanguage = Factory::getApplication()->input->get('forcedLanguage', '', 'CMD')) {
                // If the language is forced we can't allow to select the language, so transform the language selector filter into a hidden field.
                $languageXml = new \SimpleXMLElement('<field name="language" type="hidden" default="' . $forcedLanguage . '" />');
                $this->filterForm->setField($languageXml, 'filter', true);

                // Also, unset the active language filter so the search tools is not open by default with this filter.
                unset($this->activeFilters['language']);

                // One last changes needed is to change the category filter to just show categories with All language or with the forced language.
                $this->filterForm->setFieldAttribute('category_id', 'language', '*,' . $forcedLanguage, 'filter');
            }
        }

        parent::display($tpl);
    }

    /**
     * Add the page title and toolbar.
     *
     * @return  void
     *
     * @since   1.6
     */
    protected function addToolbar()
    {
        $state = $this->get('State');
        $canDo = ContentHelper::getActions('com_newsfeeds', 'category', $state->get('filter.category_id'));
        $user  = Factory::getApplication()->getIdentity();

        // Get the toolbar object instance
        $toolbar = Toolbar::getInstance('toolbar');

        ToolbarHelper::title(Text::_('COM_NEWSFEEDS_MANAGER_NEWSFEEDS'), 'rss newsfeeds');

        if ($canDo->get('core.create') || count($user->getAuthorisedCategories('com_newsfeeds', 'core.create')) > 0) {
            $toolbar->addNew('newsfeed.add');
        }

        if (!$this->isEmptyState && ($canDo->get('core.edit.state') || $user->authorise('core.admin'))) {
            $dropdown = $toolbar->dropdownButton('status-group')
                ->text('JTOOLBAR_CHANGE_STATUS')
                ->toggleSplit(false)
                ->icon('icon-ellipsis-h')
                ->buttonClass('btn btn-action')
                ->listCheck(true);

            $childBar = $dropdown->getChildToolbar();

            $childBar->publish('newsfeeds.publish')->listCheck(true);
            $childBar->unpublish('newsfeeds.unpublish')->listCheck(true);
            $childBar->archive('newsfeeds.archive')->listCheck(true);

            if ($user->authorise('core.admin')) {
                $childBar->checkin('newsfeeds.checkin')->listCheck(true);
            }

            if ($this->state->get('filter.published') != -2) {
                $childBar->trash('newsfeeds.trash')->listCheck(true);
            }

            // Add a batch button
            if (
                $user->authorise('core.create', 'com_newsfeeds')
                && $user->authorise('core.edit', 'com_newsfeeds')
                && $user->authorise('core.edit.state', 'com_newsfeeds')
            ) {
                $childBar->popupButton('batch')
                    ->text('JTOOLBAR_BATCH')
                    ->selector('collapseModal')
                    ->listCheck(true);
            }
        }

        if (!$this->isEmptyState && $state->get('filter.published') == -2 && $canDo->get('core.delete')) {
            $toolbar->delete('newsfeeds.delete')
                ->text('JTOOLBAR_EMPTY_TRASH')
                ->message('JGLOBAL_CONFIRM_DELETE')
                ->listCheck(true);
        }

        if ($user->authorise('core.admin', 'com_newsfeeds') || $user->authorise('core.options', 'com_newsfeeds')) {
            $toolbar->preferences('com_newsfeeds');
        }

        $toolbar->help('News_Feeds');
    }
}
