<?php  //$id: $
/* For licensing terms, see /dokeos_license.txt */

/**
==============================================================================
 * First initialisation file with initialisation of variables and
 * without outputting anything to browser.
 * 1. Calls global.inc.php and lang file
 * 2. Initialises $dropbox_cnf array with all relevant vars
 * 3. Often used functions
 *
 * @version 1.31
 * @copyright 2004-2005
 * @author Jan Bols <jan@ivpv.UGent.be>, main programmer
 * @author Rene Haentjens, severalcontributions <rene.haentjens@UGent.be> (see RH)
 * @author Roan Embrechts, virtual course support
 * @author Patrick Cool <patrick.cool@UGent.be>
 				Dokeos Config Settings (AWACS)
 				Refactoring
 				tool introduction
 				folders
 				download file / folder (download icon)
 				same action on multiple documents
 				extended feedback
 * @package dokeos.dropbox
==============================================================================
 */

/*
==============================================================================
		INIT SECTION
==============================================================================
*/ 
// name of the language file that needs to be included 
$language_file = "dropbox";	

//this var disables the link in the breadcrumbs on top of the page
//$noPHP_SELF = TRUE;	

// including the basic Dokeos initialisation file
require("../inc/global.inc.php");
require_once(api_get_path(LIBRARY_PATH) . "security.lib.php");

// the dropbox configuration parameters
require_once('dropbox_config.inc.php');

// the dropbox sanity files (adds a new table and some new fields)
//require_once('dropbox_sanity.inc.php');

// the dropbox file that contains additional functions
require_once('dropbox_functions.inc.php');

require(api_get_path(INCLUDE_PATH).'/conf/mail.conf.php');

include_once(api_get_path(LIBRARY_PATH) . 'mail.lib.inc.php');
include_once(api_get_path(LIBRARY_PATH) . 'fileUpload.lib.php');

// protecting the script 
api_protect_course_script();


/*
-----------------------------------------------------------
	Libraries
-----------------------------------------------------------
*/ 
require_once(api_get_path(LIBRARY_PATH)."/debug.lib.inc.php");
require_once(api_get_path(LIBRARY_PATH) . "/course.lib.php");
require_once(api_get_path(LIBRARY_PATH) . "/groupmanager.lib.php");


// including the library for the sortable table
require_once(api_get_path(LIBRARY_PATH).'/tablesort.lib.php');

// including the library for the dropbox
require_once( "dropbox_class.inc.php");

// including the library to do the tracking
require_once(api_get_path(LIBRARY_PATH).'/events.lib.inc.php');

// including some libraries that are also used in the documents tool
require_once('../document/document.inc.php');  // we use a function build_document_icon_tag
require_once(api_get_path(LIBRARY_PATH).'/fileDisplay.lib.php'); // the function choose_image is used 
require_once(api_get_path(LIBRARY_PATH).'/document.lib.php');



/*
-----------------------------------------------------------
	Virtual course support
-----------------------------------------------------------
*/ 
$user_id = api_get_user_id();
$course_code = $_course['sysCode'];
$course_info = Database::get_course_info($course_code);

$is_course_member = CourseManager::is_user_subscribed_in_real_or_linked_course($user_id, $course_code);


/*
-----------------------------------------------------------
	Object Initialisation
-----------------------------------------------------------
*/
// we need this here because the javascript to re-upload the file needs an array
// off all the documents that have already been sent. 
// @todo consider moving the javascripts in a function that displays the javascripts
// only when it is needed. 
if ($_GET['action']=='add')
{
	$dropbox_person = new Dropbox_Person( $_user['user_id'], $is_courseAdmin, $is_courseTutor);
}

/*
-----------------------------------------------------------
	create javascript and htmlHeaders
	// RH: Mailing: new function confirmsend
-----------------------------------------------------------
*/

$javascript = "<script>
	function confirmsend ()
	{
		if (confirm(\"".dropbox_lang("mailingConfirmSend", "noDLTT")."\")){
			return true;
		} else {
			return false;
		}
		return true;
	}

	function confirmation (name)
	{
		if (confirm(\"".dropbox_lang("confirmDelete", "noDLTT")." : \"+ name )){
			return true;
		} else {
			return false;
		}
		return true;
	}

	function checkForm (frm)
	{
		if (frm.elements['recipients[]'].selectedIndex < 0){
			alert(\"".dropbox_lang("noUserSelected", "noDLTT")."\");
			return false;
		} else if (frm.file.value == '') {
			alert(\"".dropbox_lang("noFileSpecified", "noDLTT")."\");
			return false;
		} else {
			return true;
		}
	}
	";

if (dropbox_cnf("allowOverwrite"))
{
	$javascript .= "
		var sentArray = new Array(";	//sentArray keeps list of all files still available in the sent files list
										//of the user.
										//This is used to show or hide the overwrite file-radio button of the upload form
	for($i=0; $i<count($dropbox_person->sentWork); $i++)
	{
		if ($i > 0)
		{
		    $javascript .= ", ";
		}
		$javascript .= "'".$dropbox_person->sentWork[$i]->title."'";
		//echo '***'.$dropbox_person->sentWork[$i]->title;
	}
	$javascript .=");

		function checkfile(str)
		{

			ind = str.lastIndexOf('/'); //unix separator
			if (ind == -1) ind = str.lastIndexOf('\\\');	//windows separator
			filename = str.substring(ind+1, str.length);

			found = 0;
			for (i=0; i<sentArray.length; i++) {
				if (sentArray[i] == filename) found=1;
			}

			//always start with unchecked box
			el = getElement('cb_overwrite');
			el.checked = false;

			//show/hide checkbox
			if (found == 1) {
				displayEl('overwrite');
			} else {
				undisplayEl('overwrite');
			}
		}

		function getElement(id)
		{
			return document.getElementById ? document.getElementById(id) :
			document.all ? document.all(id) : null;
		}

		function displayEl(id)
		{
			var el = getElement(id);
			if (el && el.style) el.style.display = '';
		}

		function undisplayEl(id)
		{
			var el = getElement(id);
			if (el && el.style) el.style.display = 'none';
		}";
}

$javascript .="
	</script>";

$htmlHeadXtra[] = $javascript;

$htmlHeadXtra[] =
"<script>
function confirmation (name)
{
	if (confirm(\" ". get_lang("AreYouSureToDelete") ." \"+ name + \" ?\"))
		{return true;}
	else
		{return false;}
}
</script>";

api_session_register('javascript');

$htmlHeadXtra[] = '<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="expires" content="-1">';



$checked_files=false;
if (!$_GET['view'] OR $_GET['view']=='received')
{
	$part='received';
}
elseif ($_GET['view']='sent')
{
	$part='sent';
}
else 
{
	header ('location: index.php?view='.$_GET['view'].'&error=Error');
}
if (($_POST['action']=='download_received' || $_POST['action']=='download_sent') and !$_POST['store_feedback'])
{
	{
	$checked_file_ids = $_POST['id'];
	if (!is_array($checked_file_ids) || count($checked_file_ids)==0)
	{
		header ('location: index.php?view='.$_GET['view'].'&error=CheckAtLeastOneFile');
		exit; 
	}
	else 
		handle_multiple_actions();
		exit; 
	}
}

/*
 * ========================================
 *         AUTHORISATION SECTION
 * ========================================
 * Prevents access of all users that are not course members
 */
if((!$is_allowed_in_course || !$is_courseMember) && !api_is_allowed_to_edit())
{
	if ($origin != 'learnpath')
	{
		api_not_allowed(true);//print headers/footers
	}else{
		api_not_allowed();
	}
	exit();
}

/*
==============================================================================
		BREADCRUMBS
==============================================================================
*/ 
if ($_GET['view']=='received')
{
	$interbreadcrumb[] = array ("url" => "../dropbox/index.php", "name" => dropbox_lang("dropbox", "noDLTT"));
	$nameTools = get_lang('ReceivedFiles');
	
	if ($_GET['action'] == 'addreceivedcategory')
	{
		$interbreadcrumb[] = array ("url" => "../dropbox/index.php?view=received", "name" => get_lang("ReceivedFiles"));
		$nameTools = get_lang('AddNewCategory');		
	}
}
if ($_GET['view']=='sent' OR empty($_GET['view']))
{
	$interbreadcrumb[] = array ("url" => "../dropbox/index.php", "name" => dropbox_lang("dropbox", "noDLTT"));
	$nameTools = get_lang('SentFiles');
	
	if ($_GET['action'] == 'addsentcategory')
	{
		$interbreadcrumb[] = array ("url" => "../dropbox/index.php?view=sent", "name" => get_lang("SentFiles"));
		$nameTools = get_lang('AddNewCategory');		
	}
	if ($_GET['action'] == 'add')
	{
		$interbreadcrumb[] = array ("url" => "../dropbox/index.php?view=sent", "name" => get_lang("SentFiles"));
		$nameTools = get_lang('UploadNewFile');		
	}		
}


/*
==============================================================================
		HEADER & TITLE
==============================================================================
*/ 

if ($origin != 'learnpath')
{
    Display::display_header($nameTools,"Dropbox");
}
else // if we come from the learning path we have to include the stylesheet and the required javascripts manually. 
{
	echo '<link rel="stylesheet" type="text/css" href="',api_get_path(WEB_CODE_PATH), 'css/default.css">';
	echo $javascript;
}

// api_display_tool_title($nameTools);
?>