<?php

class FSecureBlogBridge extends BridgeAbstract {
	const NAME = 'F-Secure Blog';
	const URI = 'https://blog.f-secure.com';
	const DESCRIPTION = 'F-Secure Blog';
	const MAINTAINER = 'simon816';
	const PARAMETERS = array(
		'' => array(
			'categories' => array(
				'name' => 'Blog categories',
				'exampleValue' => 'home-security',
			),
			'language' => array(
				'name' => 'Language',
				'required' => true,
				'defaultValue' => 'en',
			),
			'oldest_date' => array(
				'name' => 'Oldest article date',
				'exampleValue' => '-6 months',
			),
		)
	);

	public function getURI() {
		$lang = $this->getInput('language') or 'en';
		if ($lang === 'en') {
			return self::URI;
		}
		return self::URI . "/$lang";
	}

	public function collectData() {
		$this->items = array();
		$this->seen = array();

		$this->oldest = strtotime($this->getInput('oldest_date')) ?: 0;

		$categories = $this->getInput('categories');
		if (!empty($categories)) {
			foreach (explode(',', $categories) as $cat) {
				if (!empty($cat)) {
					$this->collectCategory($cat);
				}
			}
			return;
		}

		$html = getSimpleHTMLDOMCached($this->getURI() . '/');

		foreach ($html->find('ul.c-header-menu-desktop__list li a') as $link) {
			$url = parse_url($link->href);
			if (($pos = strpos($url['path'], '/category/')) !== false) {
				$cat = substr($url['path'], $pos + strlen('/category/'), -1);
				$this->collectCategory($cat);
			}
		}
	}

	private function collectCategory($category) {
		$url = $this->getURI() . "/category/$category/";
		while ($url) {
			//Limit total amount of requests
			if(count($this->items) >= 20) {
				break;
			}
			$url = $this->collectListing($url);
		}
	}

	// n.b. this relies on articles to be ordered by date so the cutoff works
	private function collectListing($url) {
		$html = getSimpleHTMLDOMCached($url, 60 * 60);
		$items = $html->find('section.b-blog .l-blog__content__listing div.c-listing-item');

		$catName = trim($html->find('section.b-blog .c-blog-header__title', 0)->plaintext);

		foreach ($items as $item) {
			$url = $item->getAttribute('data-url');
			if (!$this->collectArticle($url)) {
				return null; // Too old, stop collecting
			}
		}

		// Point's to 404 for non-english blog
		// $next = $html->find('link[rel=next]', 0);
		$next = $html->find('ul.page-numbers a.next', 0);
		return $next ? $next->href : null;
	}

	// Returns a boolean whether to continue collecting articles
	// i.e. date is after oldest cutoff
	private function collectArticle($url) {
		if (array_key_exists($url, $this->seen)) {
			return true;
		}
		$html = getSimpleHTMLDOMCached($url);

		$rssItem = array( 'uri' => $url, 'uid' => $url );
		$rssItem['title'] = $html->find('meta[property=og:title]', 0)->content;
		$dt = $html->find('meta[property=article:published_time]', 0)->content;
		// Exit if too old
		if (strtotime($dt) < $this->oldest) {
			return false;
		}
		$rssItem['timestamp'] = $dt;
		$img = $html->find('meta[property=og:image]', 0);
		$rssItem['enclosures'] = $img ? array($img->content) : array();
		$rssItem['author'] = trim($html->find('.c-blog-author__text a', 0)->plaintext);
		$rssItem['categories'] = array_map(function ($link) {
			return trim($link->plaintext);
		}, $html->find('.b-single-header__categories .c-category-list a'));
		$rssItem['content'] = trim($html->find('article', 0)->innertext);

		$this->items[] = $rssItem;
		$this->seen[$url] = 1;
		return true;
	}
}