<?php
/**
 * webtrees: online genealogy
 * Copyright (C) 2016 webtrees development team
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * This program 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 General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
namespace Fisharebest\Webtrees\Module;

use Fisharebest\Webtrees\Auth;
use Fisharebest\Webtrees\Database;
use Fisharebest\Webtrees\Filter;
use Fisharebest\Webtrees\Functions\FunctionsDate;
use Fisharebest\Webtrees\I18N;
use Fisharebest\Webtrees\Theme;

/**
 * Class FamilyTreeNewsModule
 */
class FamilyTreeNewsModule extends AbstractModule implements ModuleBlockInterface {
	// How to update the database schema for this module
	const SCHEMA_TARGET_VERSION   = 3;
	const SCHEMA_SETTING_NAME     = 'NB_SCHEMA_VERSION';
	const SCHEMA_MIGRATION_PREFIX = '\Fisharebest\Webtrees\Module\FamilyTreeNews\Schema';

	/**
	 * Create a new module.
	 *
	 * @param string $directory Where is this module installed
	 */
	public function __construct($directory) {
		parent::__construct($directory);

		// Create/update the database tables.
		// NOTE: if we want to set any module-settings, we'll need to move this.
		Database::updateSchema(self::SCHEMA_MIGRATION_PREFIX, self::SCHEMA_SETTING_NAME, self::SCHEMA_TARGET_VERSION);
	}

	/**
	 * How should this module be labelled on tabs, menus, etc.?
	 *
	 * @return string
	 */
	public function getTitle() {
		return /* I18N: Name of a module */ I18N::translate('News');
	}

	/**
	 * A sentence describing what this module does.
	 *
	 * @return string
	 */
	public function getDescription() {
		return /* I18N: Description of the “News” module */ I18N::translate('Family news and site announcements.');
	}

	/**
	 * Generate the HTML content of this block.
	 *
	 * @param int      $block_id
	 * @param bool     $template
	 * @param string[] $cfg
	 *
	 * @return string
	 */
	public function getBlock($block_id, $template = true, $cfg = array()) {
		global $ctype, $WT_TREE;

		switch (Filter::get('action')) {
		case 'deletenews':
			$news_id = Filter::get('news_id');
			if ($news_id) {
				Database::prepare("DELETE FROM `##news` WHERE news_id = ?")->execute(array($news_id));
			}
			break;
		}

		$more_news = Filter::getInteger('more_news');
		$limit     = 5 * (1 + $more_news);

		$articles = Database::prepare(
			"SELECT SQL_CACHE news_id, user_id, gedcom_id, UNIX_TIMESTAMP(updated) + :offset AS updated, subject, body FROM `##news` WHERE gedcom_id = :tree_id ORDER BY updated DESC LIMIT :limit"
		)->execute(array(
			'offset'  => WT_TIMESTAMP_OFFSET,
			'tree_id' => $WT_TREE->getTreeId(),
			'limit'   => $limit,
		))->fetchAll();

		$count = Database::prepare(
			"SELECT SQL_CACHE COUNT(*) FROM `##news` WHERE gedcom_id = :tree_id"
		)->execute(array(
			'tree_id' => $WT_TREE->getTreeId(),
		))->fetchOne();

		$id      = $this->getName() . $block_id;
		$class   = $this->getName() . '_block';
		$title   = $this->getTitle();
		$content = '';

		if (empty($articles)) {
			$content .= I18N::translate('No news articles have been submitted.');
		}

		foreach ($articles as $article) {
			$content .= '<div class="news_box">';
			$content .= '<div class="news_title">' . Filter::escapeHtml($article->subject) . '</div>';
			$content .= '<div class="news_date">' . FunctionsDate::formatTimestamp($article->updated) . '</div>';
			if ($article->body == strip_tags($article->body)) {
				$article->body = nl2br($article->body, false);
			}
			$content .= $article->body;
			if (Auth::isManager($WT_TREE)) {
				$content .= '<hr>';
				$content .= '<a href="#" onclick="window.open(\'editnews.php?news_id=\'+' . $article->news_id . ', \'_blank\', news_window_specs); return false;">' . I18N::translate('Edit') . '</a>';
				$content .= ' | ';
				$content .= '<a href="index.php?action=deletenews&amp;news_id=' . $article->news_id . '&amp;ctype=' . $ctype . '&amp;ged=' . $WT_TREE->getNameHtml() . '" onclick="return confirm(\'' . I18N::translate('Are you sure you want to delete “%s”?', Filter::escapeHtml($article->subject)) . "');\">" . I18N::translate('Delete') . '</a><br>';
			}
			$content .= '</div>';
		}

		if (Auth::isManager($WT_TREE)) {
			$content .= '<a href="#" onclick="window.open(\'editnews.php?gedcom_id=' . $WT_TREE->getTreeId() . '\', \'_blank\', news_window_specs); return false;">' . I18N::translate('Add a news article') . '</a>';
		}

		if ($count > $limit) {
			if (Auth::isManager($WT_TREE)) {
				$content .= ' | ';
			}
			$content .= '<a href="#" onclick="jQuery(\'#' . $id . '\').load(\'index.php?ctype=gedcom&amp;ged=' . $WT_TREE->getNameUrl() . '&amp;block_id=' . $block_id . '&amp;action=ajax&amp;more_news=' . ($more_news + 1) . '\'); return false;">' . I18N::translate('More news articles') . "</a>";
		}

		if ($template) {
			return Theme::theme()->formatBlock($id, $title, $class, $content);
		} else {
			return $content;
		}
	}

	/** {@inheritdoc} */
	public function loadAjax() {
		return false;
	}

	/** {@inheritdoc} */
	public function isUserBlock() {
		return false;
	}

	/** {@inheritdoc} */
	public function isGedcomBlock() {
		return true;
	}

	/**
	 * An HTML form to edit block settings
	 *
	 * @param int $block_id
	 */
	public function configureBlock($block_id) {
	}
}
