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

/**
 * This file allows editing documents.
 *
 * Based on create_document, this file allows
 * - edit name
 * - edit comments
 * - edit metadata (requires a document table entry)
 * - edit html content (only for htm/html files)
 *
 * For all files
 * - show editable name field
 * - show editable comments field
 * Additionally, for html and text files
 * - show RTE
 *
 * Remember, all files and folders must always have an entry in the
 * database, regardless of wether they are visible/invisible, have
 * comments or not.
 *
 * @package chamilo.document
 * @todo improve script structure (FormValidator is used to display form, but
 * not for validation at the moment)
 */

/*	Included libraries */
require_once '../inc/global.inc.php';

// Template's javascript
$htmlHeadXtra[] = '
<script>
var hide_bar = function() {
    $("#template_col").hide();
    $("#doc_form").removeClass("col-md-9");
    $("#doc_form").addClass("col-md-11");
    $("#hide_bar_template").css({"background-image" : \'url("../img/hide2.png")\'})
}

$(document).ready(function() {
    if ($(window).width() <= 785 ) {
        hide_bar();
    }

    $("#hide_bar_template").click(function() {
        $("#template_col").toggleClass("hide");
        $("#hide_bar_template").toggleClass("hide_bar_template_not_hide");
    });

    CKEDITOR.on("instanceReady", function (e) {
        showTemplates();
    });
});

</script>';

$_SESSION['whereami'] = 'document/create';
$this_section = SECTION_COURSES;
$lib_path = api_get_path(LIBRARY_PATH);

$course_info = api_get_course_info();
$group_id = api_get_group_id();

if (api_is_in_group()) {
	$group_properties = GroupManager::get_group_properties($group_id);
}

$dir = '/';

$currentDirPath = isset($_GET['curdirpath']) ? Security::remove_XSS($_GET['curdirpath']) : null;
$readonly = false;
if (isset($_GET['id'])) {
    $document_data = DocumentManager::get_document_data_by_id(
        $_GET['id'],
        api_get_course_id(),
        true
    );

	$document_id = $document_data['id'];
	$file = $document_data['path'];
	$parent_id = DocumentManager::get_document_id($course_info, dirname($file));
	$dir = dirname($document_data['path']);
	$dir_original = $dir;
	$doc = basename($file);
	$readonly = $document_data['readonly'];
}

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

$is_certificate_mode = DocumentManager::is_certificate_mode($dir);

//Call from
$call_from_tool = isset($_GET['origin']) ? Security::remove_XSS($_GET['origin']) : null;
$slide_id = isset($_GET['origin_opt']) ? Security::remove_XSS($_GET['origin_opt']) : null;
$file_name = $doc;
$group_document = false;
$sessionId = api_get_session_id();
$user_id = api_get_user_id();
$doc_tree = explode('/', $file);
$count_dir = count($doc_tree) - 2; // "2" because at the begin and end there are 2 "/"

// Level correction for group documents.
if (!empty($group_properties['directory'])) {
	$count_dir = $count_dir > 0 ? $count_dir - 1 : 0;
}
$relative_url = '';
for ($i = 0; $i < ($count_dir); $i++) {
    $relative_url .= '../';
}

$editorConfig = array(
    'ToolbarSet' => (api_is_allowed_to_edit(null, true) ? 'Documents' :'DocumentsStudent'),
    'Width' => '100%',
    'Height' => '600',
    'FullPage' => true,
    'InDocument' => true,
    'CreateDocumentDir' => $relative_url,
    'CreateDocumentWebDir' => (empty($group_properties['directory']))
        ? api_get_path(WEB_COURSE_PATH).$_course['path'].'/document/'
        : api_get_path(WEB_COURSE_PATH).api_get_course_path().'/document'.$group_properties['directory'].'/',
    'BaseHref' =>  api_get_path(WEB_COURSE_PATH).$_course['path'].'/document'.$dir
);

if ($is_certificate_mode) {
    $editorConfig['CreateDocumentDir']    = api_get_path(WEB_COURSE_PATH).$_course['path'].'/document/';
    $editorConfig['CreateDocumentWebDir'] = api_get_path(WEB_COURSE_PATH).$_course['path'].'/document/';
    $editorConfig['BaseHref']             = api_get_path(WEB_COURSE_PATH).$_course['path'].'/document'.$dir;
}

$is_allowed_to_edit = api_is_allowed_to_edit(null, true) || $_SESSION['group_member_with_upload_rights']||
	DocumentManager::is_my_shared_folder(api_get_user_id(), $dir, $sessionId);
$noPHP_SELF = true;

/*	Other initialization code */

$dbTable = Database::get_course_table(TABLE_DOCUMENT);
$course_id = api_get_course_int_id();

if (!empty($group_id)) {
	$interbreadcrumb[] = array ('url' => '../group/group_space.php?'.api_get_cidreq(), 'name' => get_lang('GroupSpace'));
	$group_document = true;
	$noPHP_SELF = true;
}

if (!$is_certificate_mode) {
	$interbreadcrumb[]=array("url"=>"./document.php?curdirpath=".urlencode($currentDirPath).'&'.api_get_cidreq(), "name"=> get_lang('Documents'));
} else {
    $interbreadcrumb[]= array('url' => '../gradebook/'.$_SESSION['gradebook_dest'], 'name' => get_lang('Gradebook'));
}

// Interbreadcrumb for the current directory root path
if (empty($document_data['parents'])) {
    $interbreadcrumb[] = array('url' => '#', 'name' => $document_data['title']);
} else {
    foreach($document_data['parents'] as $document_sub_data) {
        if ($document_data['title'] == $document_sub_data['title']) {
            continue;
        }
        $interbreadcrumb[] = array('url' => $document_sub_data['document_url'], 'name' => $document_sub_data['title']);
    }
}

if (!api_is_allowed_to_edit()) {
    api_not_allowed(true);
}

Event::event_access_tool(TOOL_DOCUMENT);

//TODO:check the below code and his funcionality
if (!api_is_allowed_to_edit()) {
	if (DocumentManager::check_readonly($course_info, $user_id, $file)) {
		api_not_allowed();
	}
}

/* MAIN TOOL CODE */

/*	Code to change the comment	*/

if (isset($_POST['comment'])) {
	// Fixing the path if it is wrong
	$comment = Database::escape_string(trim($_POST['comment']));
	$title = Database::escape_string(trim($_POST['title']));

    // Just in case see BT#3525
    if (empty($title)) {
		$title = $documen_data['title'];
	}

	if (empty($title)) {
		$title = get_document_title($_POST['filename']);
	}

    if (!empty($document_id)) {
        $query = "UPDATE $dbTable SET comment='".$comment."', title='".$title."' WHERE c_id = $course_id AND id = ".$document_id;
        Database::query($query);
        $info_message = get_lang('fileModified');
    }
}

/*	WYSIWYG HTML EDITOR - Program Logic */
if ($is_allowed_to_edit) {
	if (isset($_POST['formSent']) && $_POST['formSent'] == 1) {

		$filename = stripslashes($_POST['filename']);
        $extension = $_POST['extension'];
		$content = isset($_POST['content']) ? trim(str_replace(array("\r", "\n"), '', stripslashes($_POST['content']))) : null;
		$content = Security::remove_XSS($content, COURSEMANAGERLOWSECURITY);

		/*if (!strstr($content, '/css/frames.css')) {
			$content = str_replace('</title></head>', '</title><link rel="stylesheet" href="../css/frames.css" type="text/css" /></head>', $content);
		}*/

        if ($dir == '/') {
            $dir = '';
        }

		$file = $dir.'/'.$filename.'.'.$extension;
		$read_only_flag = isset($_POST['readonly']) ? $_POST['readonly'] : null;
		$read_only_flag = empty($read_only_flag) ? 0 : 1;

		if (empty($filename)) {
			$msgError = get_lang('NoFileName');
		} else {

		    $file_size = filesize($document_data['absolute_path']);

			if ($read_only_flag == 0) {
				if (!empty($content)) {
					if ($fp = @fopen($document_data['absolute_path'], 'w')) {
						// For flv player, change absolute path temporarily to prevent from erasing it in the following lines
						$content = str_replace(array('flv=h', 'flv=/'), array('flv=h|', 'flv=/|'), $content);
 						fputs($fp, $content);
						fclose($fp);

                        $filepath = $document_data['absolute_parent_path'];
						/*
						if (!is_dir($filepath.'css')) {
							mkdir($filepath.'css', api_get_permissions_for_new_directories());
							$doc_id = add_document($_course, $dir.'css', 'folder', 0, 'css');
							api_item_property_update(
								$_course,
								TOOL_DOCUMENT,
								$doc_id,
								'FolderCreated',
								api_get_user_id(),
								null,
								null,
								null,
								null,
								$sessionId
							);
							api_item_property_update(
								$_course,
								TOOL_DOCUMENT,
								$doc_id,
								'invisible',
								api_get_user_id(),
								null,
								null,
								null,
								null,
								$sessionId
							);
						}*/

						/*if (!is_file($filepath.'css/frames.css')) {
							$platform_theme = api_get_setting('stylesheets');
							if (file_exists(api_get_path(SYS_CODE_PATH).'css/'.$platform_theme.'/frames.css')) {
								copy(api_get_path(SYS_CODE_PATH).'css/'.$platform_theme.'/frames.css', $filepath.'css/frames.css');
								$doc_id = add_document(
									$_course,
									$dir . 'css/frames.css',
									'file',
									filesize($filepath . 'css/frames.css'),
									'frames.css'
								);
								api_item_property_update(
									$_course,
									TOOL_DOCUMENT,
									$doc_id,
									'DocumentAdded',
									api_get_user_id(),
									null,
									null,
									null,
									null,
									$sessionId
								);
								api_item_property_update(
									$_course,
									TOOL_DOCUMENT,
									$doc_id,
									'invisible',
									api_get_user_id(),
									null,
									null,
									null,
									null,
									$sessionId
								);
							}
						}*/

						// "WHAT'S NEW" notification: update table item_property
						$document_id = DocumentManager::get_document_id($_course, $file);

						if ($document_id) {
							update_existing_document(
								$_course,
								$document_id,
								$file_size,
								$read_only_flag
							);
							api_item_property_update(
								$_course,
								TOOL_DOCUMENT,
								$document_id,
								'DocumentUpdated',
								api_get_user_id(),
								null,
								null,
								null,
								null,
								$sessionId
							);
							// Update parent folders
							item_property_update_on_folder(
								$_course,
								$dir,
								api_get_user_id()
							);
							header('Location: document.php?id=' . $document_data['parent_id'] . '&' . api_get_cidreq());
							exit;
						} else {
							$msgError = get_lang('Impossible');
						}
					} else {
						$msgError = get_lang('Impossible');
					}
				} else {
					if ($document_id) {
                        update_existing_document($_course, $document_id, $file_size, $read_only_flag);
					}
				}
			} else {
                if ($document_id) {
                    update_existing_document($_course, $document_id, $file_size, $read_only_flag);
                }
			}
		}
	}
}

// Replace relative paths by absolute web paths (e.g. './' => 'http://www.chamilo.org/courses/ABC/document/')
$content = null;
$extension = null;
$filename = null;
if (file_exists($document_data['absolute_path'])) {
    $path_info = pathinfo($document_data['absolute_path']);
    $filename = $path_info['filename'];

    if (is_file($document_data['absolute_path'])) {
        $extension = $path_info['extension'];

        if (in_array($extension, array('html', 'htm'))) {
            $content = file($document_data['absolute_path']);
            $content = implode('', $content);
        }
    }
}

/*	Display user interface */

// Display the header
$nameTools = get_lang('EditDocument') . ': '.Security::remove_XSS($document_data['title']);
Display::display_header($nameTools, 'Doc');

if (isset($msgError)) {
	Display::display_error_message($msgError);
}

if (isset($info_message)) {
	Display::display_confirmation_message($info_message);
	if (isset($_POST['origin'])) {
		$slide_id = $_POST['origin_opt'];
		$call_from_tool = $_POST['origin'];
	}
}

// Owner

$document_info = api_get_item_property_info(
    api_get_course_int_id(),
    'document',
    $document_id,
    0
);

// Try to find this document in the session
if (!empty($sessionId)) {
    $document_info = api_get_item_property_info(
        api_get_course_int_id(),
        'document',
        $document_id,
        $sessionId
    );
}

$owner_id = $document_info['insert_user_id'];
$last_edit_date = $document_info['lastedit_date'];

if ($owner_id == api_get_user_id() ||
    api_is_platform_admin() ||
    $is_allowed_to_edit || GroupManager:: is_user_in_group(
        api_get_user_id(),
        api_get_group_id()
    )
) {
	$action = api_get_self().'?id='.$document_data['id'].'&'.api_get_cidreq();
	$form = new FormValidator('formEdit', 'post', $action, null, array('class' => 'form-vertical'));

	// Form title
	$form->addElement('header', $nameTools);
	$form->addElement('hidden', 'filename');
	$form->addElement('hidden', 'extension');
	$form->addElement('hidden', 'file_path');
	$form->addElement('hidden', 'commentPath');
	$form->addElement('hidden', 'showedit');
	$form->addElement('hidden', 'origin');
	$form->addElement('hidden', 'origin_opt');
    $form->addText('title', get_lang('Title'));

	$defaults['title'] = $document_data['title'];

	$form->addElement('hidden', 'formSent');
	$defaults['formSent'] = 1;

	$read_only_flag = isset($_POST['readonly']) ? $_POST['readonly'] : null;

	// Desactivation of IE proprietary commenting tags inside the text before loading it on the online editor.
	// This fix has been proposed by Hubert Borderiou, see Bug #573, http://support.chamilo.org/issues/573
	$defaults['content'] = str_replace('<!--[', '<!-- [', $content);

	// HotPotatoes tests are html files, but they should not be edited in order their functionality to be preserved.

    $showSystemFolders = api_get_course_setting('show_system_folders');
    $condition = stripos($dir, '/HotPotatoes_files') === false;
    if ($showSystemFolders == 1) {
        $condition = true;
    }

	if (($extension == 'htm' || $extension == 'html') && $condition) {
		if (empty($readonly) && $readonly == 0) {
            $form->addHtmlEditor('content', '', true, true, $editorConfig);
		}
	}

	if (!$group_document && !DocumentManager::is_my_shared_folder(api_get_user_id(), $currentDirPath, $sessionId)) {
		// Updated on field
		$last_edit_date = api_get_local_time($last_edit_date);
        $display_date = date_to_str_ago($last_edit_date).' <span class="dropbox_date">'.api_format_date($last_edit_date).'</span>';
		$form->addElement('static', null, get_lang('UpdatedOn'), $display_date);
	}

	$form->addElement('textarea', 'comment', get_lang('Comment'));

	if ($owner_id == api_get_user_id() || api_is_platform_admin()) {
		$checked =& $form->addElement('checkbox', 'readonly', null, get_lang('ReadOnly'));
		if ($readonly == 1) {
			$checked->setChecked(true);
		}
	}

	if ($is_certificate_mode) {
		$form->addButtonUpdate(get_lang('SaveCertificate'));
    } else {
		$form->addButtonUpdate(get_lang('SaveDocument'));
    }

	$defaults['filename'] = $filename;
	$defaults['extension'] = $extension;
	$defaults['file_path'] = isset($_GET['file']) ? Security::remove_XSS($_GET['file']) : null;
	$defaults['commentPath'] = $file;
	$defaults['renameTo'] = $file_name;
	$defaults['comment'] = $document_data['comment'];
	$defaults['origin'] = isset($_GET['origin']) ? Security::remove_XSS($_GET['origin']) : null;
	$defaults['origin_opt'] = isset($_GET['origin_opt']) ? Security::remove_XSS($_GET['origin_opt']) : null;

	$form->setDefaults($defaults);

	show_return($parent_id, $dir_original, $call_from_tool, $slide_id, $is_certificate_mode);

	if ($is_certificate_mode) {
		$all_information_by_create_certificate = DocumentManager::get_all_info_to_certificate(
			api_get_user_id(),
			api_get_course_id()
		);
		$str_info = '';
		foreach ($all_information_by_create_certificate[0] as $info_value) {
			$str_info .= $info_value.'<br/>';
		}
		$create_certificate=get_lang('CreateCertificateWithTags');
		Display::display_normal_message(
			$create_certificate.': <br /><br />'.$str_info,
			false
		);
	}

	if ($extension=='svg' && !api_browser_support('svg') && api_get_setting('enabled_support_svg') == 'true'){
		Display::display_warning_message(get_lang('BrowserDontSupportsSVG'));
	}
	echo '<div class="row-fluid" style="overflow:hidden">
            <div id="template_col" class="col-md-2">
                <div id="frmModel"></div>
            </div>
            <div class="col-md-1">
                <div id="hide_bar_template"></div>
            </div>
            <div id="doc_form" class="col-md-8">
				'.$form->returnForm().'
            </div>
          </div>';
}

Display::display_footer();

/**
	This function changes the name of a certain file.
	It needs no global variables, it takes all info from parameters.
	It returns nothing.
    @todo check if this function is used
*/
function change_name($base_work_dir, $source_file, $rename_to, $dir, $doc) {

	$file_name_for_change = $base_work_dir.$dir.$source_file;
    $rename_to = disable_dangerous_file($rename_to); // Avoid renaming to .htaccess file
	$rename_to = my_rename($file_name_for_change, stripslashes($rename_to)); // fileManage API

	if ($rename_to) {
		if (isset($dir) && $dir != '') {
			$source_file = $dir.$source_file;
			$new_full_file_name = dirname($source_file).'/'.$rename_to;
		} else {
			$source_file = '/'.$source_file;
			$new_full_file_name = '/'.$rename_to;
		}

		update_db_info('update', $source_file, $new_full_file_name); // fileManage API
		$name_changed = get_lang('ElRen');
		$info_message = get_lang('fileModified');

		$GLOBALS['file_name'] = $rename_to;
		$GLOBALS['doc'] = $rename_to;

		return $info_message;
	} else {
		$dialogBox = get_lang('FileExists'); // TODO: This variable is not used.

		/* Return to step 1 */
		$rename = $source_file;
		unset($source_file);
	}
}

//return button back to
function show_return($document_id, $path, $call_from_tool='', $slide_id=0, $is_certificate_mode=false)
{
    global $parent_id;
	echo '<div class="actions">';

    $url = api_get_path(WEB_CODE_PATH).'document/document.php?'.api_get_cidreq().'&id='.$parent_id;

	if ($is_certificate_mode) {
		echo '<a href="document.php?curdirpath='.Security::remove_XSS($_GET['curdirpath']).'&selectcat=' . Security::remove_XSS($_GET['selectcat']).'">'.
            Display::return_icon('back.png',get_lang('Back').' '.get_lang('To').' '.get_lang('CertificateOverview'),'',ICON_SIZE_MEDIUM).'</a>';
	} elseif($call_from_tool=='slideshow') {
		echo '<a href="'.api_get_path(WEB_PATH).'main/document/slideshow.php?slide_id='.$slide_id.'&curdirpath='.Security::remove_XSS(urlencode($_GET['curdirpath'])).'">'.
            Display::return_icon('slideshow.png', get_lang('BackTo').' '.get_lang('ViewSlideshow'),'',ICON_SIZE_MEDIUM).'</a>';
	} elseif($call_from_tool=='editdraw') {
		echo '<a href="'.$url.'">'.
            Display::return_icon('back.png', get_lang('BackTo').' '.get_lang('DocumentsOverview'),'',ICON_SIZE_MEDIUM).'</a>';
		echo '<a href="javascript:history.back(1)">'.Display::return_icon('draw.png', get_lang('BackTo').' '.get_lang('Draw'), array(), 32).'</a>';
	} elseif($call_from_tool=='editodf') {
        echo '<a href="'.$url.'">'.
            Display::return_icon('back.png', get_lang('BackTo').' '.get_lang('DocumentsOverview'),'',ICON_SIZE_MEDIUM).'</a>';
        echo '<a href="javascript:history.back(1)">'.Display::return_icon('draw.png', get_lang('BackTo').' '.get_lang('Write'), array(), 32).'</a>';
    } elseif($call_from_tool=='editpaint'){
		echo '<a href="'.$url.'">'.
            Display::return_icon('back.png', get_lang('BackTo').' '.get_lang('DocumentsOverview'), array(), ICON_SIZE_MEDIUM).'</a>';
		echo '<a href="javascript:history.back(1)">'.Display::return_icon('paint.png', get_lang('BackTo').' '.get_lang('Paint'), array(), 32).'</a>';
	} else {
		echo '<a href="'.$url.'">'.
            Display::return_icon('back.png', get_lang('BackTo').' '.get_lang('DocumentsOverview'),'',ICON_SIZE_MEDIUM).'</a>';
	}
	echo '</div>';
}
