<?php
/* For licensing terms, see /license.txt */

/**
 *  This file will show documents in a separate frame.
 *  We don't like frames, but it was the best of two bad things.
 *
 *  display html files within Chamilo - html files have the Chamilo header.
 *
 *  --- advantages ---
 *  users "feel" like they are in Chamilo,
 *  and they can use the navigation context provided by the header.
 * --- design ---
 *  a file gets a parameter (an html file) and shows
 *    - chamilo header
 *    - html file from parameter
 *    - (removed) chamilo footer
 *
 * @version 0.6
 *
 * @author Roan Embrechts (roan.embrechts@vub.ac.be)
 *
 * @package chamilo.document
 */
require_once __DIR__.'/../inc/global.inc.php';

api_protect_course_script();

$header_file = isset($_GET['file']) ? Security::remove_XSS($_GET['file']) : null;
$document_id = (int) $_GET['id'];
$originIsLearnpath = isset($_GET['origin']) && $_GET['origin'] === 'learnpathitem';
$courseInfo = api_get_course_info();
$course_code = api_get_course_id();
$session_id = api_get_session_id();

if (empty($courseInfo)) {
    api_not_allowed(true);
}

$show_web_odf = false;

// Generate path
if (!$document_id) {
    $document_id = DocumentManager::get_document_id($courseInfo, $header_file);
}
$document_data = DocumentManager::get_document_data_by_id(
    $document_id,
    $course_code,
    true,
    $session_id
);

if ($session_id != 0 && !$document_data) {
    $document_data = DocumentManager::get_document_data_by_id(
        $document_id,
        $course_code,
        true,
        0
    );
}

if (empty($document_data)) {
    api_not_allowed(true);
}

$header_file = $document_data['path'];
$name_to_show = $document_data['title'];
$path_array = explode('/', str_replace('\\', '/', $header_file));
$path_array = array_map('urldecode', $path_array);
$header_file = implode('/', $path_array);
$file = Security::remove_XSS(urldecode($document_data['path']));
$file_root = $courseInfo['path'].'/document'.str_replace('%2F', '/', $file);
$file_url_sys = api_get_path(SYS_COURSE_PATH).$file_root;
$file_url_web = api_get_path(WEB_COURSE_PATH).$file_root;

if (!file_exists($file_url_sys)) {
    api_not_allowed(true);
}

if (is_dir($file_url_sys)) {
    api_not_allowed(true);
}

$is_allowed_to_edit = api_is_allowed_to_edit();
//fix the screen when you try to access a protected course through the url
$is_allowed_in_course = api_is_allowed_in_course() || $is_allowed_to_edit;
if ($is_allowed_in_course == false) {
    api_not_allowed(true);
}

// Check user visibility.
$is_visible = DocumentManager::check_visibility_tree(
    $document_id,
    api_get_course_info(),
    api_get_session_id(),
    api_get_user_id(),
    api_get_group_id(),
    false
);

if (!$is_allowed_to_edit && !$is_visible) {
    api_not_allowed(true);
}

$pathinfo = pathinfo($header_file);
$playerSupportedFiles = ['mp3', 'mp4', 'ogv', 'flv', 'm4v', 'webm'];
$playerSupported = false;
if (in_array(strtolower($pathinfo['extension']), $playerSupportedFiles)) {
    $playerSupported = true;
}

$group_id = api_get_group_id();
$current_group = GroupManager::get_group_properties($group_id);
$current_group_name = $current_group['name'];

if (isset($group_id) && $group_id != '') {
    $interbreadcrumb[] = [
        'url' => api_get_path(WEB_CODE_PATH).'group/group.php?'.api_get_cidreq(),
        'name' => get_lang('Groups'),
    ];
    $interbreadcrumb[] = [
        'url' => api_get_path(WEB_CODE_PATH).'group/group_space.php?'.api_get_cidreq(),
        'name' => get_lang('GroupSpace').' '.$current_group_name,
    ];
    $name_to_show = explode('/', $name_to_show);
    unset($name_to_show[1]);
    $name_to_show = implode('/', $name_to_show);
}

$interbreadcrumb[] = [
    'url' => './document.php?curdirpath='.dirname($header_file).'&'.api_get_cidreq(),
    'name' => get_lang('Documents'),
];

if (empty($document_data['parents'])) {
    if (isset($_GET['createdir'])) {
        $interbreadcrumb[] = [
            'url' => $document_data['document_url'],
            'name' => $document_data['title'],
        ];
    } else {
        $interbreadcrumb[] = [
            'url' => '#',
            'name' => $document_data['title'],
        ];
    }
} else {
    foreach ($document_data['parents'] as $document_sub_data) {
        if (!isset($_GET['createdir']) && $document_sub_data['id'] == $document_data['id']) {
            $document_sub_data['document_url'] = '#';
        }
        $interbreadcrumb[] = [
            'url' => $document_sub_data['document_url'],
            'name' => $document_sub_data['title'],
        ];
    }
}

$this_section = SECTION_COURSES;
$nameTools = get_lang('Documents');

/**
 * Main code section.
 */
header('Expires: Wed, 01 Jan 1990 00:00:00 GMT');
//header('Last-Modified: '.gmdate('D, d M Y H:i:s').' GMT');
header('Last-Modified: Wed, 01 Jan 2100 00:00:00 GMT');
header('Cache-Control: no-cache, must-revalidate');
header('Pragma: no-cache');
$browser_display_title = 'Documents - '.Security::remove_XSS($_GET['cidReq']).' - '.$file;
// Only admins get to see the "no frames" link in pageheader.php, so students get a header that's not so high
$frameheight = 135;
if (api_is_course_admin()) {
    $frameheight = 165;
}

$frameReady = Display::getFrameReadyBlock('top.mainFrame');

$web_odf_supported_files = DocumentManager::get_web_odf_extension_list();
// PDF should be displayed with viewerJS
$web_odf_supported_files[] = 'pdf';
if (in_array(strtolower($pathinfo['extension']), $web_odf_supported_files)) {
    $show_web_odf = true;
    $htmlHeadXtra[] = '
    <script>
        resizeIframe = function() {
            var bodyHeight = $("body").height();
            var topbarHeight = $("#topbar").height();
            $("#viewerJSContent").height((bodyHeight - topbarHeight));
        }
        $(function() {
            $(window).resize(resizeIframe());
        });
    </script>'
    ;
}

// Activate code highlight.
$isChatFolder = false;
if (isset($document_data['parents']) && isset($document_data['parents'][0])) {
    $chatFolder = $document_data['parents'][0];
    if (isset($chatFolder['path']) && $chatFolder['path'] == '/chat_files') {
        $isChatFolder = true;
    }
}

if ($isChatFolder) {
    $htmlHeadXtra[] = api_get_js('highlight/highlight.pack.js');
    $htmlHeadXtra[] = api_get_css(api_get_path(WEB_CSS_PATH).'chat.css');
    $htmlHeadXtra[] = api_get_css(api_get_path(WEB_LIBRARY_PATH).'javascript/highlight/styles/github.css');
    $htmlHeadXtra[] = '
    <script>
        hljs.initHighlightingOnLoad();
    </script>';
}

$execute_iframe = true;
if ($playerSupported) {
    $extension = api_strtolower($pathinfo['extension']);
    $execute_iframe = false;
}

if ($show_web_odf) {
    $execute_iframe = false;
}

$is_freemind_available = $pathinfo['extension'] == 'mm' && api_get_setting('enable_freemind') == 'true';
if ($is_freemind_available) {
    $execute_iframe = false;
}

if (!$playerSupported && $execute_iframe) {
    $htmlHeadXtra[] = '<script>
    <!--
        var jQueryFrameReadyConfigPath = \''.api_get_jquery_web_path().'\';
    -->
    </script>';
    $htmlHeadXtra[] = '<script type="text/javascript" src="'.api_get_path(WEB_LIBRARY_PATH).'javascript/jquery.frameready.js"></script>';
    $htmlHeadXtra[] = '<script>
        // Fixes the content height of the frame
        $(function() {
            $(\'#mainFrame\').on(\'load\', function () {
                this.style.height = (this.contentWindow.document.body.scrollHeight + 50) + \'px\';
            });
            
            '.$frameReady.'
        });
    </script>';
}

if ($originIsLearnpath) {
    Display::display_reduced_header();
} else {
    Display::display_header();
}

$file_url = api_get_path(WEB_COURSE_PATH).$courseInfo['path'].'/document'.$header_file;
$file_url_web = $file_url.'?'.api_get_cidreq();

if ($show_web_odf) {
    echo '<div class="text-center">';
    $browser = api_get_navigator();
    $pdfUrl = api_get_path(WEB_LIBRARY_PATH).'javascript/ViewerJS/index.html#'.$file_url;
    if ($browser['name'] == 'Mozilla' && preg_match('|.*\.pdf|i', $header_file)) {
        $pdfUrl = $file_url;
    }
    echo '<div id="viewerJS">';
    echo '<iframe id="viewerJSContent" frameborder="0" allowfullscreen="allowfullscreen" webkitallowfullscreen style="width:100%;"
            src="'.$pdfUrl.'">
        </iframe>';
    echo '</div>';
    echo '</div>';
}

if ($playerSupported) {
    echo DocumentManager::generateMediaPreview($file_url_web, $extension);
}

if ($is_freemind_available) {
    ?>
    <script type="text/javascript" src="<?php echo api_get_path(WEB_LIBRARY_PATH); ?>swfobject/swfobject.js"></script>
    <style type="text/css">
        #flashcontent {
            height: 500px;
            padding-top:10px;
        }
    </style>
    <div id="flashcontent" onmouseover="giveFocus();">
        Flash plugin or Javascript are turned off.
        Activate both  and reload to view the mindmap
    </div>
    <script>
        function giveFocus() {
            document.visorFreeMind.focus();
        }

        document.onload=giveFocus;
        // <![CDATA[
        // for allowing using http://.....?mindmap.mm mode
        function getMap(map){
            var result=map;
            var loc=document.location+'';
            if(loc.indexOf(".mm")>0 && loc.indexOf("?")>0){
                result=loc.substring(loc.indexOf("?")+1);
            }
            return result;
        }
        var fo = new FlashObject("<?php echo api_get_path(WEB_LIBRARY_PATH); ?>freeMindFlashBrowser/visorFreemind.swf", "visorFreeMind", "100%", "100%", 6, "#ffffff");
        fo.addParam("quality", "high");
        //fo.addParam("bgcolor", "#a0a0f0");
        fo.addVariable("openUrl", "_blank");//Default value "_self"
        fo.addVariable("startCollapsedToLevel","3");//Default value = "-1", meaning do nothing, the mindmap will open as it was saved. The root node, or central node, of your mindmap is level zero. You could force the browser to open (unfold) your mind map to an expanded level using this variable.
        fo.addVariable("maxNodeWidth","200");
        //
        fo.addVariable("mainNodeShape","elipse");//"rectangle", "elipse", "none". None hide the main node. Default is "elipse"
        fo.addVariable("justMap","false");
        fo.addVariable("initLoadFile",getMap("<?php echo $file_url_web; ?>"));
        fo.addVariable("defaultToolTipWordWrap",200);//max width for tooltips. Default "600" pixels
        fo.addVariable("offsetX","left");//for the center of the mindmap. Admit also "left" and "right"
        fo.addVariable("offsetY","top");//for the center of the mindmap. Admit also "top" and "bottom"
        fo.addVariable("buttonsPos","top");//"top" or "bottom"
        fo.addVariable("min_alpha_buttons",20);//for dynamic view of buttons
        fo.addVariable("max_alpha_buttons",100);//for dynamic view of buttons
        fo.addVariable("scaleTooltips","false");
        //
        //extra
        //fo.addVariable("CSSFile","<?php // echo api_get_path(WEB_LIBRARY_PATH);?>freeMindFlashBrowser/flashfreemind.css");//
        //fo.addVariable("baseImagePath","<?php // echo api_get_path(WEB_LIBRARY_PATH);?>freeMindFlashBrowser/");//
        //fo.addVariable("justMap","false");//Hides all the upper control options. Default value "false"
        //fo.addVariable("noElipseMode","anyvalue");//for changing to old elipseNode edges. Default = not set
        //fo.addVariable("ShotsWidth","200");//The width of snapshots, in pixels.
        //fo.addVariable("genAllShots","true");//Preview shots (like the samples on the Shots Width page) will be generated for all linked maps when your main map loads. If you have a lot of linked maps, this could take some time to complete
        //fo.addVariable("unfoldAll","true"); //For each mindmap loaded start the display with all nodes unfolded. Another variable to be wary of!
        //fo.addVariable("toolTipsBgColor","0xaaeeaa");: bgcolor for tooltips ej;"0xaaeeaa"
        //fo.addVariable("defaultWordWrap","300"); //default 600
        //

        fo.write("flashcontent");
        // ]]>
    </script>
<?php
}

if ($execute_iframe) {
    if ($isChatFolder) {
        $content = Security::remove_XSS(file_get_contents($file_url_sys));
        echo $content;
    } else {
        $parentId = $document_data['parent_id'];
        $url = api_get_path(WEB_CODE_PATH).'document/document.php?'.api_get_cidreq().'&id='.$parentId;
        $actionsLeft = Display::url(
            Display::return_icon('back.png', get_lang('Back'), '', ICON_SIZE_MEDIUM),
            $url
        );

        $groupMemberWithEditRights = false;
        $groupId = api_get_group_id();
        if (!empty($groupId)) {
            $groupInfo = GroupManager::get_group_properties($groupId);
            if ($groupInfo) {
                $groupMemberWithEditRights = GroupManager::allowUploadEditDocument(
                    api_get_user_id(),
                    api_get_course_int_id(),
                    $groupInfo,
                        $document_data
                );
            }
        }

        $allowToEdit = api_is_allowed_to_edit(null, true) || $groupMemberWithEditRights;

        if ($allowToEdit) {
            $actionsLeft .= Display::url(
                Display::return_icon(
                    'edit.png',
                    get_lang('Modify'),
                    '',
                    ICON_SIZE_MEDIUM
                ),
                api_get_path(WEB_CODE_PATH).'document/edit_document.php?'.api_get_cidreq().'&id='.$document_id
            );

            $titleToShow = addslashes(basename($document_data['title']));

            $urlDeleteParams = http_build_query(
                [
                    'action' => 'delete_item',
                    'id' => $parentId,
                    'deleteid' => $document_data['id'],
                ]
            );
            $actionsLeft .= Display::url(
                Display::return_icon('delete.png', get_lang('Delete'), '', ICON_SIZE_MEDIUM),
                '#',
                [
                    'data-item-title' => $titleToShow,
                    'data-href' => api_get_path(WEB_CODE_PATH).'document/document.php?'.api_get_cidreq(
                        ).'&'.$urlDeleteParams,
                    'data-toggle' => 'modal',
                    'data-target' => '#confirm-delete',
                ]
            );
            $actionsLeft .= Display::url(
                Display::return_icon('pdf.png', get_lang('Export2PDF'), [], ICON_SIZE_MEDIUM),
                api_get_path(WEB_CODE_PATH).'document/document.php?'.api_get_cidreq(
                ).'&action=export_to_pdf&id='.$document_id
            );
        }

        echo $toolbar = Display::toolbarAction('actions-documents', [$actionsLeft]);

        echo '<iframe 
            id="mainFrame" 
            name="mainFrame" 
            border="0" 
            frameborder="0" 
            scrolling="no" 
            style="width:100%;" height="600" 
            src="'.$file_url_web.'&rand='.mt_rand(1, 10000).'" 
            height="500" allowfullscreen="true" webkitallowfullscreen="true" mozallowfullscreen="true"></iframe>';
    }
}
Display::display_footer();