<?php
/**
*/
date_default_timezone_set(@date_default_timezone_get());

/**
 * @param string $locale
 *
 * @return array
*/
function html_news($locale = 'en', $count = 5)
{
    $news = get_news($locale, $count);
    $html =  '<ul class="news">';
    $item_tmpl = '<li><a href="%2$s">%3$s</a> <span class="dt">%1$s</span></li>';
    foreach ($news as $item)
    {
        $html .= sprintf($item_tmpl,
            news_date($item['date'], $locale),
            $item['link'],
            $item['title']
            );
    }
    $html .= '</ul>';
    return $html;
}

/**
 * @param string $dt date in the form ISO 8601 (2015-02-24T15:42:00+01:00)
 * @param string $locale
 *
 * @return string localised date
*/
function news_date($dt, $locale = 'en')
{
    $eng_months       = array('Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec');
    $localised_months = array(_r('Jan'), _r('Feb'), _r('Mar'), _r('Apr'), _r('May'), _r('Jun'), _r('Jul'), _r('Aug'), _r('Sep'), _r('Oct'), _r('Nov'), _r('Dec'));

    $date_format = _r('M d Y');
    if ((strpbrk($date_format, 'dj') == false) // check valid day formats
        || (strpbrk($date_format, 'M') == false) // check valid month formats (all are 'FmMn' but we replace them in 3 letter form)
        || (strpbrk($date_format, 'oYy') == false)) // check valid year formats
    {
        $date_format = 'M d Y'; // fallback for invalid date format localisation
    }
    return str_replace($eng_months, $localised_months, date($date_format, strtotime($dt)));
}

/**
 * @param string $locale
 * @param integer $count
 * @param integer $cache_timeout
 *
 * @return array
*/
function get_news($locale = 'en', $count = 5, $cache_timeout = 5)
{
    return get_feed(blog_link($locale), $count, cache_timeout);

}

/**
*/
function get_feed($url, $count = 5, $cache_timeout = 5)
{
    include_once G_APP_ROOT . '/lib/simplepie/simplepie.inc';

    $feed = new SimplePie();

    $feed->set_feed_url($url);
    $feed->set_cache_location(realpath(G_APP_ROOT . '/_nav/var/tmp/cache'));
    $feed->set_cache_duration(3600 * $cache_timeout);
    $feed->set_timeout(2);
    $feed->enable_order_by_date(true);
    $feed->init();
    $feed->handle_content_type();
    $items = array();

    foreach ($feed->get_items(0, $count) as $item)
    {
        $items[] = array(
            'source' => $item->get_feed()->get_link(),
            'link'   => $item->get_permalink(),
            'title'  => $item->get_title(),
            'date'   => $item->get_date('c'),
            'desc'   => $item->get_description(),
            'author' => $item->get_author()
        );
    }

    unset($feed);

    return $items;
}

/**
 * 
 * @param string $locale locale this feed is expected to be in
 * @param string $news_title feed title
 * @param string $link feed main site title
 * @param string $feed feed url
 * @param integer $count how many items to return
 * @param string $skip url whose element we want to skip (why?)
 * @param boolean split title that has been built by aggregator
 * @param string $discrete_title more discrete title
 *
 * @return string
*/
function show_feed($locale, $news_title, $link, $feed, $count = 5, $skip = null, $split = false, $discrete_title = null) {

    if (!is_null($skip))
        $count += 5;

    $data = get_feed($feed, $count);
    if(0 == count($data)) {
        $feed = rtrim($feed, '10'); // cut 10 as a fallback (type=rss)
        $data = get_feed($feed, $count);
    }
    if(0 == count($data)) {
        $feed = $feed .'10'; // add 10 as a fallback (type=rss10)
        $data = get_feed($feed, $count);
    }
    if(0 == count($data)) {
        return;
    }

    $s = '';
    $header = '';
    $source = null;
    $date_separator = (is_null($discrete_title) ? null : '| ');

    $s .= '<ul id="newslist">';
    foreach ($data as $d) {
        if (!is_null($skip) && strpos($d['link'], $skip) !== false)
            continue;

        if ($split && strpos($d['title'], ') : ') !== false) {
            $title  = explode(') : ', $d['title']);
            $source = array_shift($title) . '): ';
            $source = (is_null($date_separator) ? $source : null);
            $title  = implode(' : ', $title);
        } else {
            $title  = $d['title'];
            $source = null;
        }

        $s .= sprintf('<li>%s<a href="%s">%s%s</a> %s<span class="dt">%s</span></li>',
            $discrete_title, $d['link'], $source, $title, $date_separator, news_date($d['date'], $locale));
        $discrete_title = null;
    }
    $s .= '</ul>';

    if (is_null($date_separator)) {
        $header = sprintf('<h2><a href="%s">%s</a></h2>', $link, $news_title);
    }

    $s  = $header . $s;
    echo $s;
}

/**
*/
function blog_link($locale)
{
    $news = array(
        'el' => 'https://blog.mageia.org/el/',
        'en' => 'https://blog.mageia.org/en/',
        'es' => 'https://blog.mageia.org/es/',
        'fr' => 'https://blog.mageia.org/fr/',
        'de' => 'https://blog.mageia.org/de/',
        'it' => 'https://blog.mageia.org/it/',
        'pl' => 'https://blog.mageia.org/en/', // pl when up to date
        'pt' => 'https://blog.mageia.org/pt/',
        'ro' => 'https://blog.mageia.org/ro/',
        'ru' => 'https://blog.mageia.org/en/', // ru, when up to date
        'tr' => 'https://blog.mageia.org/tr/',
        /* missing: et, fi, lv, nb, nl, sl, zh-cn, zh-tw */
    );

    if (!array_key_exists($locale, $news))
        $locale = 'en';

    $source_url = $news[$locale];

    return $source_url;
}

function planet_link($locale)
{
    $planets = array('en', 'fr', 'de', 'es', 'it', 'pt');
    $locale = in_array($locale, $planets) ? $locale : 'en';

    return sprintf('https://planet.mageia.org/%s/', $locale);
}