<?php

/* For licensing terms, see /license.txt */

use Chamilo\CoreBundle\Enums\ActionIcon;
use Chamilo\CoreBundle\Framework\Container;
use Chamilo\CourseBundle\Entity\CForum;

/**
 * These files are a complete rework of the forum. The database structure is
 * based on phpBB but all the code is rewritten. A lot of new functionalities
 * are added:
 * - forum categories and forums can be sorted up or down, locked or made invisible
 * - consistent and integrated forum administration
 * - forum options:     are students allowed to edit their post?
 *                      moderation of posts (approval)
 *                      reply only forums (students cannot create new threads)
 *                      multiple forums per group
 * - sticky messages
 * - new view option: nested view
 * - quoting a message.
 *
 * @Author Patrick Cool <patrick.cool@UGent.be>, Ghent University
 * @Copyright Ghent University
 * @Copyright Patrick Cool
 */
require_once __DIR__.'/../inc/global.inc.php';

// Notification for unauthorized people.
api_protect_course_script(true);

$cidreq = api_get_cidreq();
$_user = api_get_user_info();

$nameTools = get_lang('Forums');

$htmlHeadXtra[] = api_get_jquery_libraries_js(['jquery-ui', 'jquery-upload']);
$htmlHeadXtra[] = '<script>

function check_unzip() {
    if (document.upload.unzip.checked){
        document.upload.if_exists[0].disabled=true;
        document.upload.if_exists[1].checked=true;
        document.upload.if_exists[2].disabled=true;
    } else {
        document.upload.if_exists[0].checked=true;
        document.upload.if_exists[0].disabled=false;
        document.upload.if_exists[2].disabled=false;
    }
}
function setFocus() {
    $("#title_file").focus();
}
</script>';
// The next javascript script is to manage ajax upload file
$htmlHeadXtra[] = api_get_jquery_libraries_js(['jquery-ui', 'jquery-upload']);

// Recover Thread ID, will be used to generate delete attachment URL to do ajax
$threadId = isset($_REQUEST['thread']) ? (int) ($_REQUEST['thread']) : 0;
$forumId = isset($_REQUEST['forum']) ? (int) ($_REQUEST['forum']) : 0;

$ajaxUrl = api_get_path(WEB_AJAX_PATH).'forum.ajax.php?'.api_get_cidreq();
// The next javascript script is to delete file by ajax
$htmlHeadXtra[] = '<script>
$(function () {
    $(document).on("click", ".deleteLink", function(e) {
        e.preventDefault();
        e.stopPropagation();
        var l = $(this);
        var id = l.closest("tr").attr("id");
        var filename = l.closest("tr").find(".attachFilename").html();
        if (confirm("'.get_lang('Are you sure to delete').'", filename)) {
            $.ajax({
                type: "POST",
                url: "'.$ajaxUrl.'&a=delete_file&attachId=" + id +"&thread='.$threadId.'&forum='.$forumId.'",
                dataType: "json",
                success: function(data) {
                    if (data.error == false) {
                        l.closest("tr").remove();
                        if ($(".files td").length < 1) {
                            $(".files").closest(".control-group").hide();
                        }
                    }
                }
            })
        }
    });
});
</script>';

// Are we in a lp ?
$origin = api_get_origin();

$forumId = isset($_GET['forum']) ? (int) $_GET['forum'] : 0;
$repo = Container::getForumRepository();

$forumEntity = null;
if (!empty($forumId)) {
    /** @var CForum $forumEntity */
    $forumEntity = $repo->find($forumId);
}

$courseEntity = api_get_course_entity(api_get_course_int_id());
$sessionEntity = api_get_session_entity(api_get_session_id());
$current_forum_category = $forumEntity->getForumCategory();

$logInfo = [
    'tool' => TOOL_FORUM,
    'tool_id' => $forumId,
    'action' => 'add-thread',
];
Event::registerLog($logInfo);

if (api_is_in_gradebook()) {
    $interbreadcrumb[] = [
        'url' => Category::getUrl(),
        'name' => get_lang('Assessments'),
    ];
}

/* Is the user allowed here? */
// The user is not allowed here if:
// 1. the forumcategory or forum is invisible (visibility==0) and the user is not a course manager
if (!api_is_allowed_to_create_course() && //is a student
    (
        ($current_forum_category && false == $current_forum_category->isVisible($courseEntity)) ||
        false == $current_forum_category->isVisible($courseEntity)
    ) && !api_get_session_id()
) {
    api_not_allowed(true);
}

// 2. the forumcategory or forum is locked (locked <>0) and the user is not a course manager
if (!api_is_allowed_to_edit(false, true) &&
    (($current_forum_category->isVisible($courseEntity) &&
        0 != $current_forum_category->getLocked()) || 0 != $forumEntity->getLocked())
) {
    api_not_allowed();
}

// 3. new threads are not allowed and the user is not a course manager
if (!api_is_allowed_to_edit(false, true) &&
    1 != $forumEntity->getAllowNewThreads()
) {
    api_not_allowed();
}
// 4. anonymous posts are not allowed and the user is not logged in
if (!$_user['user_id'] && 1 != $forumEntity->getAllowAnonymous()) {
    api_not_allowed();
}

// 5. Check user access
if (0 != $forumEntity->getForumOfGroup()) {
    $show_forum = GroupManager::userHasAccess(
        api_get_user_id(),
        api_get_group_entity($forumEntity->getForumOfGroup()),
        GroupManager::GROUP_TOOL_FORUM
    );
    if (!$show_forum) {
        api_not_allowed();
    }
}

// 6. Invited users can't create new threads
if (api_is_invitee()) {
    api_not_allowed(true);
}

$groupId = api_get_group_id();
if (!empty($groupId)) {
    $groupProperties = GroupManager::get_group_properties($groupId);
    $interbreadcrumb[] = [
        'url' => api_get_path(WEB_CODE_PATH).'group/group.php?'.$cidreq,
        'name' => get_lang('Groups'),
    ];
    $interbreadcrumb[] = [
        'url' => api_get_path(WEB_CODE_PATH).'group/group_space.php?'.$cidreq,
        'name' => get_lang('Group area').' '.$groupProperties['name'],
    ];
    $interbreadcrumb[] = [
        'url' => api_get_path(WEB_CODE_PATH).'forum/viewforum.php?'.$cidreq.'&forum='.(int) ($_GET['forum']),
        'name' => $forumEntity->getTitle(),
    ];
    $interbreadcrumb[] = [
        'url' => api_get_path(WEB_CODE_PATH).'forum/newthread.php?'.$cidreq.'&forum='.(int) ($_GET['forum']),
        'name' => get_lang('Create thread'),
    ];
} else {
    $interbreadcrumb[] = ['url' => api_get_path(WEB_CODE_PATH).'forum/index.php?'.$cidreq, 'name' => $nameTools];
    if ($current_forum_category) {
        $interbreadcrumb[] = [
            'url' => api_get_path(WEB_CODE_PATH).'forum/index.php?'.$cidreq.'&forumcategory='.$current_forum_category->getIid(),
            'name' => $current_forum_category->getTitle(),
        ];
    }
    $interbreadcrumb[] = [
        'url' => api_get_path(WEB_CODE_PATH).'forum/viewforum.php?'.$cidreq.'&forum='.$forumId,
        'name' => $forumEntity->getTitle(),
    ];
    $interbreadcrumb[] = ['url' => '#', 'name' => get_lang('Create thread')];
}

$htmlHeadXtra[] = "
    <script>
        $(function() {
            $('#reply-add-attachment').on('click', function(e) {
                e.preventDefault();
                var newInputFile = $('<input>', {
                    type: 'file',
                    name: 'user_upload[]'
                });
                $('[name=\"user_upload[]\"]').parent().append(newInputFile);
            });
        });
    </script>
";

$form = newThread(
    $forumEntity,
    isset($_SESSION['formelements']) ? $_SESSION['formelements'] : null
);

Display::display_header();

//$actions  '<span style="float:right;">'.search_link().'</span>';
$actions = '<a href="viewforum.php?forum='.(int) ($_GET['forum']).'&'.$cidreq.'">'.
    Display::getMdiIcon(ActionIcon::BACK, 'ch-tool-icon', null, ICON_SIZE_MEDIUM, get_lang('Back to forum')).'</a>';
echo Display::toolbarAction('toolbar', [$actions]);

// Set forum attachment data into $_SESSION
getAttachedFiles($forumEntity->getIid(), 0, 0);

if ($form) {
    $form->display();
}

if ('learnpath' == $origin) {
    Display::display_reduced_footer();
} else {
    Display::display_footer();
}
