<?php
/**
 * @brief periodical, a plugin for Dotclear 2
 * 
 * @package Dotclear
 * @subpackage Plugin
 * 
 * @author Jean-Christian Denis and contributors
 * 
 * @copyright Jean-Christian Denis
 * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
 */

if (!defined('DC_RC_PATH')) {
    return null;
}

if (!in_array($core->url->type, ['default', 'feed'])) {
    return null;
}

$core->blog->settings->addNamespace('periodical'); 

$core->addBehavior(
    'publicBeforeDocument',
    ['publicPeriodical', 'publicBeforeDocument']
);

/**
 * @ingroup DC_PLUGIN_PERIODICAL
 * @brief Periodical - public methods.
 * @since 2.6
 */
class publicPeriodical
{
    /**
     * Publish periodical
     * 
     * @param  dcCore $core dcCore instance
     */
    public static function publicBeforeDocument(dcCore $core)
    {
        try {
            $per = new periodical($core);
            $s = $core->blog->settings->periodical;

            $per->lockUpdate();

            # Get periods
            $periods =  $core->auth->sudo([$per, 'getPeriods']);

            # No period
            if ($periods->isEmpty()) {
                $per->unlockUpdate();

                return null;
            }

            $now = dt::toUTC(time());
            $posts_order = $s->periodical_pub_order;
            if (!preg_match('/^(post_dt|post_creadt|post_id) (asc|desc)$/', $posts_order)) {
                $posts_order = 'post_dt asc';
            }
            $cur_period = $core->con->openCursor($core->prefix . 'periodical');

            while($periods->fetch()) {

                # Check if period is ongoing
                $cur_tz = strtotime($periods->periodical_curdt);
                $end_tz = strtotime($periods->periodical_enddt);
                $now_tz = $now + dt::getTimeOffset($periods->periodical_tz, $now);

                if ($now_tz > $cur_tz && $now_tz < $end_tz) {

                    $last_nb = 0;
                    $last_tz = $cur_tz;

                    $max_nb = $periods->periodical_pub_nb;
                    $max_tz = $end_tz < $now_tz ? $end_tz : $now_tz;

                    # Calculate nb of posts to get
                    $loop_tz = $cur_tz;
                    $limit = 0;
                    try {
                        while(1) {
                            if ($loop_tz > $max_tz) {
                                break;
                            }
                            $loop_tz = $per->getNextTime($loop_tz, $periods->periodical_pub_int);
                            $limit += 1;
                        }
                    } catch (Exception $e) {

                    }

                    # If period need update
                    if ($limit > 0) {

                        # Get posts to publish related to this period
                        $posts_params = [];
                        $posts_params['periodical_id'] = $periods->periodical_id;
                        $posts_params['post_status'] = '-2';
                        $posts_params['order'] = $posts_order;
                        $posts_params['limit'] = $limit * $max_nb;
                        $posts_params['no_content'] = true;
                        $posts =  $core->auth->sudo([$per, 'getPosts'], $posts_params);

                        if (!$posts->isEmpty()) {
                            $cur_post = $core->con->openCursor($core->prefix . 'post');

                            while($posts->fetch()) {

                                # Publish post with right date
                                $cur_post->clean();
                                $cur_post->post_status = 1;

                                # Update post date with right date
                                if ($s->periodical_upddate) {
                                    $cur_post->post_dt = date('Y-m-d H:i:s', $last_tz);
                                    $cur_post->post_tz = $periods->periodical_tz;
                                } else {
                                    $cur_post->post_dt = $posts->post_dt;
                                }

                                # Also update post url with right date
                                if ($s->periodical_updurl) {
                                    $cur_post->post_url = $core->blog->getPostURL('', $cur_post->post_dt, $posts->post_title, $posts->post_id);
                                }

                                $cur_post->update(
                                    'WHERE post_id = ' . $posts->post_id . ' ' .
                                    "AND blog_id = '" . $core->con->escape($core->blog->id) . "' "
                                );

                                # Delete post relation to this period
                                $per->delPost($posts->post_id);

                                $last_nb++;

                                # Increment upddt if nb of publishing is to the max
                                if ($last_nb == $max_nb) {
                                    $last_tz = $per->getNextTime($last_tz, $periods->periodical_pub_int);
                                    $last_nb = 0;
                                }

                                # --BEHAVIOR-- periodicalAfterPublishedPeriodicalEntry
                                $core->callBehavior('periodicalAfterPublishedPeriodicalEntry', $core, $posts, $periods);

                            }
                            $core->blog->triggerBlog();
                        }
                    }

                    # Update last published date of this period even if there's no post to publish
                    $cur_period->clean();
                    $cur_period->periodical_curdt = date('Y-m-d H:i:s', $loop_tz);
                    $cur_period->update(
                        'WHERE periodical_id = ' . $periods->periodical_id . ' ' .
                        "AND blog_id = '" . $core->con->escape($core->blog->id) . "' "
                    );
                }
            }
            $per->unlockUpdate();
        } catch (Exception $e) {
            $per->unlockUpdate();

            return null;
        }
    }
}