<?php
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU social is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with GNU social.  If not, see <http://www.gnu.org/licenses/>.

defined('GNUSOCIAL') || die();

/**
 * Widget for displaying a single notice.
 *
 * This widget has the core smarts for showing a single notice: what to display,
 * where, and under which circumstances. Its key method is show(); this is a recipe
 * that calls all the other show*() methods to build up a single notice. The
 * ProfileNoticeListItem subclass, for example, overrides showAuthor() to skip
 * author info (since that's implicit by the data in the page).
 *
 * @category  UI
 * @package   GNUsocial
 * @author    Evan Prodromou <evan@status.net>
 * @license   https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
 * @see       NoticeList
 * @see       ProfileNoticeListItem
 */
class ThreadedNoticeListItem extends NoticeListItem
{
    protected $userProfile = null;

    public function __construct(Notice $notice, Action $out = null, $profile = null)
    {
        parent::__construct($notice, $out);
        $this->userProfile = $profile;
    }

    public function initialItems()
    {
        return 3;
    }

    /**
     * finish the notice
     *
     * Close the last elements in the notice list item
     *
     * @return void
     */
    public function showEnd()
    {
        $max = $this->initialItems();
        if (!$this->repeat instanceof Notice) {
            $stream = new ConversationNoticeStream($this->notice->conversation, $this->userProfile);
            $notice = $stream->getNotices(0, $max + 2);
            $notices = [];
            $cnt = 0;
            $moreCutoff = null;
            while ($notice->fetch()) {
                if (Event::handle('StartAddNoticeReply', [$this, $this->notice, $notice])) {
                    // Don't list repeats as separate notices in a conversation
                    if (!empty($notice->repeat_of)) {
                        continue;
                    }

                    if ($notice->id == $this->notice->id) {
                        // Skip!
                        continue;
                    }

                    if (!$notice->isVerb([ActivityVerb::POST])) {
                        continue;
                    }

                    $cnt++;
                    if ($cnt > $max) {
                        // boo-yah
                        $moreCutoff = clone $notice;
                        break;
                    }
                    $notices[] = clone $notice; // *grumble* inefficient as hell
                    Event::handle('EndAddNoticeReply', [$this, $this->notice, $notice]);
                }
            }

            if (Event::handle('StartShowThreadedNoticeTail', array($this, $this->notice, &$notices))) {
                $threadActive = count($notices) > 0; // has this thread had any activity?

                $this->out->elementStart('ul', 'notices threaded-replies xoxo');

                if (Event::handle('StartShowThreadedNoticeTailItems', array($this, $this->notice, &$threadActive))) {
                    // Repeats and Faves/Likes are handled in plugins.
                    Event::handle('EndShowThreadedNoticeTailItems', array($this, $this->notice, &$threadActive));
                }

                if (count($notices) > 0) {
                    if ($moreCutoff) {
                        $item = new ThreadedNoticeListMoreItem($moreCutoff, $this->out, count($notices));
                        $item->show();
                    }
                    foreach (array_reverse($notices) as $notice) {
                        if (Event::handle('StartShowThreadedNoticeSub', array($this, $this->notice, $notice))) {
                            $item = new ThreadedNoticeListSubItem($notice, $this->notice, $this->out);
                            $item->show();
                            Event::handle('EndShowThreadedNoticeSub', array($this, $this->notice, $notice));
                        }
                    }
                }

                Event::handle('EndShowThreadedNoticeTail', array($this, $this->notice, $notices));
                $this->out->elementEnd('ul');
            }
        }

        parent::showEnd();
    }
}