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<?php

/**
 * This file contains just one function that formats a topic to be printer
 * friendly.
 *
 * Simple Machines Forum (SMF)
 *
 * @package SMF
 * @author Simple Machines https://www.simplemachines.org
 * @copyright 2020 Simple Machines and individual contributors
 * @license https://www.simplemachines.org/about/smf/license.php BSD
 *
 * @version 2.1 RC2
 */

if (!defined('SMF'))
    die('No direct access...');

/**
 * Format a topic to be printer friendly.
 * Must be called with a topic specified.
 * Accessed via ?action=printpage.
 *
 * @uses Printpage template, main sub-template.
 * @uses print_above/print_below later without the main layer.
 */

function PrintTopic()
{
    global $topic, $txt, $scripturl, $context, $user_info;
    global $board_info, $smcFunc, $modSettings;

    // Redirect to the boardindex if no valid topic id is provided.
    if (empty($topic))
        redirectexit();

    if (!empty($modSettings['disable_print_topic']))
    {
        unset($_REQUEST['action']);
        $context['theme_loaded'] = false;
        fatal_lang_error('feature_disabled', false);
    }

    // Whatever happens don't index this.
    $context['robot_no_index'] = true;

    // Get the topic starter information.
    $request = $smcFunc['db_query']('', '
        SELECT mem.id_member, m.poster_time, COALESCE(mem.real_name, m.poster_name) AS poster_name, t.id_poll
        FROM {db_prefix}messages AS m
            LEFT JOIN {db_prefix}members AS mem ON (mem.id_member = m.id_member)
            LEFT JOIN {db_prefix}topics as t ON (t.id_first_msg = m.id_msg)
        WHERE m.id_topic = {int:current_topic}
        ORDER BY m.id_msg
        LIMIT 1',
        array(
            'current_topic' => $topic,
        )
    );
    // Redirect to the boardindex if no valid topic id is provided.
    if ($smcFunc['db_num_rows']($request) == 0)
        redirectexit();
    $row = $smcFunc['db_fetch_assoc']($request);
    $smcFunc['db_free_result']($request);

    if (!empty($row['id_poll']))
    {
        loadLanguage('Post');
        // Get the question and if it's locked.
        $request = $smcFunc['db_query']('', '
            SELECT
                p.question, p.voting_locked, p.hide_results, p.expire_time, p.max_votes, p.change_vote,
                p.guest_vote, p.id_member, COALESCE(mem.real_name, p.poster_name) AS poster_name, p.num_guest_voters, p.reset_poll
            FROM {db_prefix}polls AS p
                LEFT JOIN {db_prefix}members AS mem ON (mem.id_member = p.id_member)
            WHERE p.id_poll = {int:id_poll}
            LIMIT 1',
            array(
                'id_poll' => $row['id_poll'],
            )
        );
        $pollinfo = $smcFunc['db_fetch_assoc']($request);
        $smcFunc['db_free_result']($request);

        $request = $smcFunc['db_query']('', '
            SELECT COUNT(DISTINCT id_member) AS total
            FROM {db_prefix}log_polls
            WHERE id_poll = {int:id_poll}
                AND id_member != {int:not_guest}',
            array(
                'id_poll' => $row['id_poll'],
                'not_guest' => 0,
            )
        );
        list ($pollinfo['total']) = $smcFunc['db_fetch_row']($request);
        $smcFunc['db_free_result']($request);

        // Total voters needs to include guest voters
        $pollinfo['total'] += $pollinfo['num_guest_voters'];

        // Get all the options, and calculate the total votes.
        $request = $smcFunc['db_query']('', '
            SELECT pc.id_choice, pc.label, pc.votes, COALESCE(lp.id_choice, -1) AS voted_this
            FROM {db_prefix}poll_choices AS pc
                LEFT JOIN {db_prefix}log_polls AS lp ON (lp.id_choice = pc.id_choice AND lp.id_poll = {int:id_poll} AND lp.id_member = {int:current_member} AND lp.id_member != {int:not_guest})
            WHERE pc.id_poll = {int:id_poll}',
            array(
                'current_member' => $user_info['id'],
                'id_poll' => $row['id_poll'],
                'not_guest' => 0,
            )
        );
        $pollOptions = array();
        $realtotal = 0;
        $pollinfo['has_voted'] = false;
        while ($row = $smcFunc['db_fetch_assoc']($request))
        {
            censorText($row['label']);
            $pollOptions[$row['id_choice']] = $row;
            $realtotal += $row['votes'];
            $pollinfo['has_voted'] |= $row['voted_this'] != -1;
        }
        $smcFunc['db_free_result']($request);

        // If this is a guest we need to do our best to work out if they have voted, and what they voted for.
        if ($user_info['is_guest'] && $pollinfo['guest_vote'] && allowedTo('poll_vote'))
        {
            if (!empty($_COOKIE['guest_poll_vote']) && preg_match('~^[0-9,;]+$~', $_COOKIE['guest_poll_vote']) && strpos($_COOKIE['guest_poll_vote'], ';' . $row['id_poll'] . ',') !== false)
            {
                // ;id,timestamp,[vote,vote...]; etc
                $guestinfo = explode(';', $_COOKIE['guest_poll_vote']);
                // Find the poll we're after.
                foreach ($guestinfo as $i => $guestvoted)
                {
                    $guestvoted = explode(',', $guestvoted);
                    if ($guestvoted[0] == $row['id_poll'])
                        break;
                }
                // Has the poll been reset since guest voted?
                if ($pollinfo['reset_poll'] > $guestvoted[1])
                {
                    // Remove the poll info from the cookie to allow guest to vote again
                    unset($guestinfo[$i]);
                    if (!empty($guestinfo))
                        $_COOKIE['guest_poll_vote'] = ';' . implode(';', $guestinfo);
                    else
                        unset($_COOKIE['guest_poll_vote']);
                }
                else
                {
                    // What did they vote for?
                    unset($guestvoted[0], $guestvoted[1]);
                    foreach ($pollOptions as $choice => $details)
                    {
                        $pollOptions[$choice]['voted_this'] = in_array($choice, $guestvoted) ? 1 : -1;
                        $pollinfo['has_voted'] |= $pollOptions[$choice]['voted_this'] != -1;
                    }
                    unset($choice, $details, $guestvoted);
                }
                unset($guestinfo, $guestvoted, $i);
            }
        }

        $context['user']['started'] = $user_info['id'] == $row['id_member'] && !$user_info['is_guest'];
        // Set up the basic poll information.
        $context['poll'] = array(
            'id' => $row['id_poll'],
            'image' => 'normal_' . (empty($pollinfo['voting_locked']) ? 'poll' : 'locked_poll'),
            'question' => parse_bbc($pollinfo['question']),
            'total_votes' => $pollinfo['total'],
            'change_vote' => !empty($pollinfo['change_vote']),
            'is_locked' => !empty($pollinfo['voting_locked']),
            'options' => array(),
            'lock' => allowedTo('poll_lock_any') || ($context['user']['started'] && allowedTo('poll_lock_own')),
            'edit' => allowedTo('poll_edit_any') || ($context['user']['started'] && allowedTo('poll_edit_own')),
            'allowed_warning' => $pollinfo['max_votes'] > 1 ? sprintf($txt['poll_options_limit'], min(count($pollOptions), $pollinfo['max_votes'])) : '',
            'is_expired' => !empty($pollinfo['expire_time']) && $pollinfo['expire_time'] < time(),
            'expire_time' => !empty($pollinfo['expire_time']) ? timeformat($pollinfo['expire_time']) : 0,
            'has_voted' => !empty($pollinfo['has_voted']),
            'starter' => array(
                'id' => $pollinfo['id_member'],
                'name' => $row['poster_name'],
                'href' => $pollinfo['id_member'] == 0 ? '' : $scripturl . '?action=profile;u=' . $pollinfo['id_member'],
                'link' => $pollinfo['id_member'] == 0 ? $row['poster_name'] : '<a href="' . $scripturl . '?action=profile;u=' . $pollinfo['id_member'] . '">' . $row['poster_name'] . '</a>'
            )
        );

        // Make the lock and edit permissions defined above more directly accessible.
        $context['allow_lock_poll'] = $context['poll']['lock'];
        $context['allow_edit_poll'] = $context['poll']['edit'];

        // You're allowed to view the results if:
        // 1. you're just a super-nice-guy, or
        // 2. anyone can see them (hide_results == 0), or
        // 3. you can see them after you voted (hide_results == 1), or
        // 4. you've waited long enough for the poll to expire. (whether hide_results is 1 or 2.)
        $context['allow_poll_view'] = allowedTo('moderate_board') || $pollinfo['hide_results'] == 0 || ($pollinfo['hide_results'] == 1 && $context['poll']['has_voted']) || $context['poll']['is_expired'];

        // Calculate the percentages and bar lengths...
        $divisor = $realtotal == 0 ? 1 : $realtotal;

        // Determine if a decimal point is needed in order for the options to add to 100%.
        $precision = $realtotal == 100 ? 0 : 1;

        // Now look through each option, and...
        foreach ($pollOptions as $i => $option)
        {
            // First calculate the percentage, and then the width of the bar...
            $bar = round(($option['votes'] * 100) / $divisor, $precision);
            $barWide = $bar == 0 ? 1 : floor(($bar * 8) / 3);

            // Now add it to the poll's contextual theme data.
            $context['poll']['options'][$i] = array(
                'id' => 'options-' . $i,
                'percent' => $bar,
                'votes' => $option['votes'],
                'voted_this' => $option['voted_this'] != -1,
                // Note: IE < 8 requires us to set a width on the container, too.
                'bar_ndt' => $bar > 0 ? '<div class="bar" style="width: ' . ($bar * 3.5 + 4) . 'px;"><div style="width: ' . $bar * 3.5 . 'px;"></div></div>' : '',
                'bar_width' => $barWide,
                'option' => parse_bbc($option['label']),
                'vote_button' => '<input type="' . ($pollinfo['max_votes'] > 1 ? 'checkbox' : 'radio') . '" name="options[]" id="options-' . $i . '" value="' . $i . '">'
            );
        }
    }

    // Lets "output" all that info.
    loadTemplate('Printpage');
    $context['template_layers'] = array('print');
    $context['board_name'] = $board_info['name'];
    $context['category_name'] = $board_info['cat']['name'];
    $context['poster_name'] = $row['poster_name'];
    $context['post_time'] = timeformat($row['poster_time'], false);
    $context['parent_boards'] = array();
    foreach ($board_info['parent_boards'] as $parent)
        $context['parent_boards'][] = $parent['name'];

    // Split the topics up so we can print them.
    $request = $smcFunc['db_query']('', '
        SELECT subject, poster_time, body, COALESCE(mem.real_name, poster_name) AS poster_name, id_msg
        FROM {db_prefix}messages AS m
            LEFT JOIN {db_prefix}members AS mem ON (mem.id_member = m.id_member)
        WHERE m.id_topic = {int:current_topic}' . ($modSettings['postmod_active'] && !allowedTo('approve_posts') ? '
            AND (m.approved = {int:is_approved}' . ($user_info['is_guest'] ? '' : ' OR m.id_member = {int:current_member}') . ')' : '') . '
        ORDER BY m.id_msg',
        array(
            'current_topic' => $topic,
            'is_approved' => 1,
            'current_member' => $user_info['id'],
        )
    );
    $context['posts'] = array();
    while ($row = $smcFunc['db_fetch_assoc']($request))
    {
        // Censor the subject and message.
        censorText($row['subject']);
        censorText($row['body']);

        $context['posts'][] = array(
            'subject' => $row['subject'],
            'member' => $row['poster_name'],
            'time' => timeformat($row['poster_time'], false),
            'timestamp' => forum_time(true, $row['poster_time']),
            'body' => parse_bbc($row['body'], 'print'),
            'id_msg' => $row['id_msg'],
        );

        if (!isset($context['topic_subject']))
            $context['topic_subject'] = $row['subject'];
    }
    $smcFunc['db_free_result']($request);

    // Fetch attachments so we can print them if asked, enabled and allowed
    if (isset($_REQUEST['images']) && !empty($modSettings['attachmentEnable']) && allowedTo('view_attachments'))
    {
        $messages = array();
        foreach ($context['posts'] as $temp)
            $messages[] = $temp['id_msg'];

        // build the request
        $request = $smcFunc['db_query']('', '
            SELECT
                a.id_attach, a.id_msg, a.approved, a.width, a.height, a.file_hash, a.filename, a.id_folder, a.mime_type
            FROM {db_prefix}attachments AS a
            WHERE a.id_msg IN ({array_int:message_list})
                AND a.attachment_type = {int:attachment_type}',
            array(
                'message_list' => $messages,
                'attachment_type' => 0,
                'is_approved' => 1,
            )
        );
        $temp = array();
        while ($row = $smcFunc['db_fetch_assoc']($request))
        {
            $temp[$row['id_attach']] = $row;
            if (!isset($context['printattach'][$row['id_msg']]))
                $context['printattach'][$row['id_msg']] = array();
        }
        $smcFunc['db_free_result']($request);
        ksort($temp);

        // load them into $context so the template can use them
        foreach ($temp as $row)
        {
            if (!empty($row['width']) && !empty($row['height']))
            {
                if (!empty($modSettings['max_image_width']) && (empty($modSettings['max_image_height']) || $row['height'] * ($modSettings['max_image_width'] / $row['width']) <= $modSettings['max_image_height']))
                {
                    if ($row['width'] > $modSettings['max_image_width'])
                    {
                        $row['height'] = floor($row['height'] * ($modSettings['max_image_width'] / $row['width']));
                        $row['width'] = $modSettings['max_image_width'];
                    }
                }
                elseif (!empty($modSettings['max_image_width']))
                {
                    if ($row['height'] > $modSettings['max_image_height'])
                    {
                        $row['width'] = floor($row['width'] * $modSettings['max_image_height'] / $row['height']);
                        $row['height'] = $modSettings['max_image_height'];
                    }
                }

                $row['filename'] = getAttachmentFilename($row['filename'], $row['id_attach'], $row['id_folder'], false, $row['file_hash']);

                // save for the template
                $context['printattach'][$row['id_msg']][] = $row;
            }
        }
    }

    // Set a canonical URL for this page.
    $context['canonical_url'] = $scripturl . '?topic=' . $topic . '.0';
}

?>