<?php

/**
 * @param array<FreshRSS_Feed> $feeds
 */
function feedsToOutlines($feeds, $excludeMutedFeeds = false): array {
	$outlines = [];
	foreach ($feeds as $feed) {
		if ($feed->mute() && $excludeMutedFeeds) {
			continue;
		}
		$outline = [
			'text' => htmlspecialchars_decode($feed->name(), ENT_QUOTES),
			'type' => FreshRSS_Export_Service::TYPE_RSS_ATOM,
			'xmlUrl' => htmlspecialchars_decode($feed->url(), ENT_QUOTES),
			'htmlUrl' => htmlspecialchars_decode($feed->website(), ENT_QUOTES),
			'description' => htmlspecialchars_decode($feed->description(), ENT_QUOTES),
		];
		if ($feed->kind() === FreshRSS_Feed::KIND_HTML_XPATH) {
			$outline['type'] = FreshRSS_Export_Service::TYPE_HTML_XPATH;
			/** @var array<string,string> */
			$xPathSettings = $feed->attributes('xpath');
			$outline['frss:xPathItem'] = ['namespace' => FreshRSS_Export_Service::FRSS_NAMESPACE, 'value' => $xPathSettings['item'] ?? null];
			$outline['frss:xPathItemTitle'] = ['namespace' => FreshRSS_Export_Service::FRSS_NAMESPACE, 'value' => $xPathSettings['itemTitle'] ?? null];
			$outline['frss:xPathItemContent'] = ['namespace' => FreshRSS_Export_Service::FRSS_NAMESPACE, 'value' => $xPathSettings['itemContent'] ?? null];
			$outline['frss:xPathItemUri'] = ['namespace' => FreshRSS_Export_Service::FRSS_NAMESPACE, 'value' => $xPathSettings['itemUri'] ?? null];
			$outline['frss:xPathItemAuthor'] = ['namespace' => FreshRSS_Export_Service::FRSS_NAMESPACE, 'value' => $xPathSettings['itemAuthor'] ?? null];
			$outline['frss:xPathItemTimestamp'] = ['namespace' => FreshRSS_Export_Service::FRSS_NAMESPACE, 'value' => $xPathSettings['itemTimestamp'] ?? null];
			$outline['frss:xPathItemTimeformat'] = ['namespace' => FreshRSS_Export_Service::FRSS_NAMESPACE, 'value' => $xPathSettings['itemTimeformat'] ?? null];
			$outline['frss:xPathItemThumbnail'] = ['namespace' => FreshRSS_Export_Service::FRSS_NAMESPACE, 'value' => $xPathSettings['itemThumbnail'] ?? null];
			$outline['frss:xPathItemCategories'] = ['namespace' => FreshRSS_Export_Service::FRSS_NAMESPACE, 'value' => $xPathSettings['itemCategories'] ?? null];
			$outline['frss:xPathItemUid'] = ['namespace' => FreshRSS_Export_Service::FRSS_NAMESPACE, 'value' => $xPathSettings['itemUid'] ?? null];
		}
		if (!empty($feed->filtersAction('read'))) {
			$filters = '';
			foreach ($feed->filtersAction('read') as $filterRead) {
				$filters .= $filterRead->getRawInput() . "\n";
			}
			$filters = trim($filters);
			$outline['frss:filtersActionRead'] = ['namespace' => FreshRSS_Export_Service::FRSS_NAMESPACE, 'value' => $filters];
		}
		if ($feed->pathEntries() != '') {
			$outline['frss:cssFullContent'] = ['namespace' => FreshRSS_Export_Service::FRSS_NAMESPACE, 'value' => htmlspecialchars_decode($feed->pathEntries(), ENT_QUOTES)];
		}
		if ($feed->attributes('path_entries_filter') != '') {
			$outline['frss:cssFullContentFilter'] = ['namespace' => FreshRSS_Export_Service::FRSS_NAMESPACE, 'value' => $feed->attributes('path_entries_filter')];
		}
		$outlines[] = $outline;
	}
	return $outlines;
}

/** @var FreshRSS_View $this */

$opml_array = array(
	'head' => array(
		'title' => FreshRSS_Context::$system_conf->title,
		'dateCreated' => date('D, d M Y H:i:s')
	),
	'body' => array()
);

if (!empty($this->categories)) {
	foreach ($this->categories as $key => $cat) {
		$outline = [
			'text' => htmlspecialchars_decode($cat->name(), ENT_QUOTES),
			'@outlines' => feedsToOutlines($cat->feeds(), $this->excludeMutedFeeds),
		];
		if ($cat->kind() === FreshRSS_Category::KIND_DYNAMIC_OPML) {
			$outline['frss:opmlUrl'] = ['namespace' => FreshRSS_Export_Service::FRSS_NAMESPACE, 'value' => $cat->attributes('opml_url')];;
		}
		$opml_array['body'][$key] = $outline;
	}
}

if (!empty($this->feeds)) {
	$opml_array['body'][] = feedsToOutlines($this->feeds, $this->excludeMutedFeeds);
}

echo libopml_render($opml_array);
