[Release] Merge posts

<?xml version="1.0" encoding="utf-8"?>

<extension engine="1.0">
    <id>merge_posts</id>
    <title>Merge posts</title>
    <description>This extension merges posts. Example: one user posting after prior own post. Both posts are automatically merged.</description>
    <version>1.1</version>

    <minversion>1.3.2</minversion>
    <maxtestedon>1.3.2</maxtestedon>

    <author>lexazloy</author>

    <hooks>
        <hook id="fn_add_post_qr_add_post"><![CDATA[
            function l_plural($int, $array, $noint = false){
                list($banan, $banana, $bananov) = (!is_array($array) ? explode('/', $array) : $array);

                $n1 = substr($int, -1);
                $n2 = substr($int, -2);
                $string = $bananov;

                if ($n2 >= 10 and $n2 <= 20)
                    $string = $bananov;
                elseif ($n1 == 1)
                    $string = $banan;
                elseif ($n1 >= 2 and $n1 <= 4)
                    $string = $banana;

                return trim($noint ? $string : $int.' '.$string);
            }

////////////////////////////////////////////////////////////////////////////////

            // http://php.net/datetime/#78025
            function l_ago($second, $len = 3, $plural = array()){
                $plural = array_merge(array(
                    'separator' => ',',
                    'seconds' => 'second/seconds/seconds',
                    'minutes' => 'minute/minutes/minutes',
                    'hours' => 'hour/hours/hours',
                    'days' => 'day/days/days',
                    'weeks' => 'week/weeks/weeks',
                    'months' => 'month/months/months',
                    'years' => 'year/years/years',
                    'ago' => 'ago',
                    'and' => 'and'
                ), $plural);
                $period = array(
                    'years'   => 31556926,
                    'months'  => 2629743,
                    'weeks'   => 604800,
                    'days'    => 86400,
                    'hours'   => 3600,
                    'minutes' => 60,
                    'seconds' => 1
                );

                foreach ($period as $k => $v)
                    if ($second >= $v){
                        $durations = floor($second / $v);
                        $second -= ($durations * $v);
                        $array[] = l_plural($durations, $plural[$k]);
                    }

                if (count($array) > 1){
                    if (count($array) == 2){
                        $result = $array[0].($len != 1 ? ' '.$plural['and'].' '.$array[1] : '');
                    } elseif (count($array) <= $len){
                        $end = array_pop($array);
                        $result = join($plural['separator'].' ', $array).' '.$plural['and'].' '.$end;
                    } else {
                        if ($len = count($result = array_slice($array, 0, $len - 1)))
                            $result = join($plural['separator'].' ', $result).' '.$plural['and'].' '.$array[$len];
                        else
                            $result = $array[$len];
                    }
                } else {
                    $result = $array[0];
                }

                return trim($result.' '.$plural['ago']);
            }

////////////////////////////////////////////////////////////////////////////////

            $l = array();
            $l['query'] = array('SELECT' => 'id, poster_id, posted', 'FROM' => 'posts', 'WHERE' => 'topic_id = '.$post_info['topic_id'], 'ORDER BY' => 'id desc', 'LIMIT' => 1);

            $l['post'] = $forum_db->query_build($l['query']) or error(__FILE__, __LINE__);
            $l['post'] = $forum_db->fetch_assoc($l['post']);

            $l['ago'] = l_ago((time() - $l['post']['posted']), 3, array('ago' => 'after'));
            $l['ago'] = sprintf('\n\n[i][color=#cccccc]%s:[/color][/i]\n\n', $l['ago']);

            if ($l['edit'] = ($post_info['poster_id'] == $l['post']['poster_id']))
                $query = array(
                    'UPDATE' => 'posts',
                    'WHERE'  => 'id = '.$l['post']['id'],
                    'SET'    => 'message = concat(message, "'.$l['ago'].'", "'.$forum_db->escape($post_info['message']).'")'
                );
        ]]></hook>

        <hook id="fn_add_post_qr_get_topic_reply_count"><![CDATA[
            if ($l['edit'])
                $new_pid = $l['post']['id'];
        ]]></hook>
    </hooks>
</extension>