<?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\Fact;
use Fisharebest\Webtrees\Functions\Functions;
use Fisharebest\Webtrees\Functions\FunctionsPrintFacts;
use Fisharebest\Webtrees\GedcomTag;
use Fisharebest\Webtrees\I18N;

/**
 * Class SourcesTabModule
 */
class SourcesTabModule extends AbstractModule implements ModuleTabInterface {
	/** @var Fact[] All facts belonging to this source. */
	private $facts;

	/** {@inheritdoc} */
	public function getTitle() {
		return /* I18N: Name of a module */ I18N::translate('Sources');
	}

	/** {@inheritdoc} */
	public function getDescription() {
		return /* I18N: Description of the “Sources” module */ I18N::translate('A tab showing the sources linked to an individual.');
	}

	/** {@inheritdoc} */
	public function defaultTabOrder() {
		return 30;
	}

	/** {@inheritdoc} */
	public function hasTabContent() {
		global $WT_TREE;

		return Auth::isEditor($WT_TREE) || $this->getFactsWithSources();
	}

	/** {@inheritdoc} */
	public function isGrayedOut() {
		return !$this->getFactsWithSources();
	}

	/** {@inheritdoc} */
	public function getTabContent() {
		global $controller;

		ob_start();
		?>
		<table class="facts_table">
			<tr class="noprint">
				<td colspan="2" class="descriptionbox rela">
					<label>
						<input id="show-level-2-sources" type="checkbox">
						<?php echo I18N::translate('Show all sources'); ?>
					</label>
				</td>
			</tr>
			<?php
			foreach ($this->getFactsWithSources() as $fact) {
				if ($fact->getTag() == 'SOUR') {
					FunctionsPrintFacts::printMainSources($fact, 1);
				} else {
					FunctionsPrintFacts::printMainSources($fact, 2);
				}
			}
			if (!$this->getFactsWithSources()) {
				echo '<tr><td id="no_tab4" colspan="2" class="facts_value">', I18N::translate('There are no source citations for this individual.'), '</td></tr>';
			}

			// New Source Link
			if ($controller->record->canEdit()) {
				?>
				<tr class="noprint">
					<td class="facts_label">
						<?php echo GedcomTag::getLabel('SOUR'); ?>
					</td>
					<td class="facts_value">
						<a href="#" onclick="add_new_record('<?php echo $controller->record->getXref(); ?>','SOUR'); return false;">
							<?php echo I18N::translate('Add a source citation'); ?>
						</a>
					</td>
				</tr>
			<?php
			}
			?>
		</table>
		<script>
			persistent_toggle("show-level-2-sources", ".row_sour2");
		</script>
		<?php

		return '<div id="' . $this->getName() . '_content">' . ob_get_clean() . '</div>';
	}

	/**
	 * Get all the facts for an individual which contain sources.
	 *
	 * @return Fact[]
	 */
	private function getFactsWithSources() {
		global $controller;

		if ($this->facts === null) {
			$facts = $controller->record->getFacts();
			foreach ($controller->record->getSpouseFamilies() as $family) {
				if ($family->canShow()) {
					foreach ($family->getFacts() as $fact) {
						$facts[] = $fact;
					}
				}
			}
			$this->facts = [];
			foreach ($facts as $fact) {
				if (preg_match('/(?:^1|\n\d) SOUR/', $fact->getGedcom())) {
					$this->facts[] = $fact;
				}
			}
			Functions::sortFacts($this->facts);
		}

		return $this->facts;
	}

	/** {@inheritdoc} */
	public function canLoadAjax() {
		return !Auth::isSearchEngine(); // Search engines cannot use AJAX
	}

	/** {@inheritdoc} */
	public function getPreLoadContent() {
		return '';
	}
}
