chamilo-lms2/main/dropbox/index.php

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

/**
 * @desc The dropbox is a personal (peer to peer) file exchange module that allows
 * you to send documents to a certain (group of) users.
 *
 * @version 1.3
 *
 * @author Jan Bols <jan@ivpv.UGent.be>, main programmer, initial version
 * @author René Haentjens <rene.haentjens@UGent.be>, several contributions
 * @author Roan Embrechts, virtual course support
 * @author Patrick Cool <patrick.cool@UGent.be>, Ghent University (see history version 1.3)
 *
 * @package chamilo.dropbox
 *
 * @todo complete refactoring. Currently there are about at least 3 sql queries needed for every individual dropbox document.
 *			first we find all the documents that were sent (resp. received) by the user
 *			then for every individual document the user(s)information who received (resp. sent) the document is searched
 *			then for every individual document the feedback is retrieved
 * @todo 	the implementation of the dropbox categories could (on the database level) have been done more elegantly by storing the category
 *			in the dropbox_person table because this table stores the relationship between the files (sent OR received) and the users
 */

/**
					HISTORY
Version 1.1
------------
- dropbox_init1.inc.php: changed include statements to require statements. This way if a file is not found, it stops the execution of a script instead of continuing with warnings.
- dropbox_init1.inc.php: the include files "claro_init_global.inc.php" & "debug.lib.inc.php" are first checked for their existence before including them. If they don't exist, in the .../include dir, they get loaded from the .../inc dir. This change is necessary because the UCL changed the include dir to inc.
- dropbox_init1.inc.php: the databasetable name in the variable $dropbox_cnf["introTbl"] is chnged from "introduction" to "tool_intro"
- install.php: after submit, checks if the database uses accueil or tool_list as a tablename
- index.php: removed the behaviour of only the teachers that are allowed to delete entries
- index.php: added field "lastUploadDate" in table dropbox_file to store information about last update when resubmiting a file
- dropbox.inc.php: added $lang["lastUpdated"]
- index.php: entries in received list show when file was last updated if it is updated
- index.php: entries in sent list show when file was last resent if it was resent
- dropbox_submit.php: add a unique id to every uploaded file
- index.php: add POST-variable to the upload form with overwrite data when user decides to overwrite the previous sent file with new file
- dropbox_submit.php: add sanity checks on POST['overwrite'] data
- index.php: remove title field in upload form
- dropbox_submit.php: remove use of POST['title'] variable
- dropbox_init1.inc.php: added $dropbox_cnf["version"] variable
- dropbox_class.inc.php: add $this->lastUploadDate to Dropbox_work class
- dropbox.inc.php: added $lang['emptyTable']
- index.php: if the received or sent list is empty, a message is displayed
- dropbox_download.php: the $file var is set equal to the title-field of the filetable. So not constructed anymore by substracting the username from the filename
- index.php: add check to see if column lastUploadDate exists in filetable
- index.php: moved javascripts from dropbox_init2.inc.php to index.php
- index.php: when specifying an uploadfile in the form, a checkbox allowing the user to overwrite a previously sent file is shown when the specified file has the same name as a previously uploaded file of that user.
- index.php: assign all the metadata (author, description, date, recipient, sender) of an entry in a list to the class="dropbox_detail" and add css to html-header
- index.php: assign all dates of entries in list to the class="dropbox_date" and add CSS
- index.php: assign all persons in entries of list to the class="dropbox_person" and add CSS
- dropbox.inc.php: added $lang['dropbox_version'] to indicate the lates version. This must be equal to the $dropbox_cnf['version'] variable.
- dropbox_init1.inc.php: if the newest lang file isn't loaded by claro_init_global.inc.php from the .../lang dir it will be loaded locally from the .../plugin/dropbox/ dir. This way an administrator must not install the dropbox.inc.php in the .../lang/english dir, but he can leave it in the local .../plugin/dropbox/ dir. However if you want to present multiple language translations of the file you must still put the file in the /lang/ dir, because there is no language management system inside the .../plugin/dropbox dir.
- mime.inc.php: created this file. It contains an array $mimetype with all the mimetypes that are used by dropbox_download.php to give hinst to the browser during download about content
- dropbox_download.php: remove https specific headers because they're not necessary
- dropbox_download.php: use application/octet-stream as the default mime and inline as the default Content-Disposition
- dropbox.inc.php: add lang vars for "order by" action
- dropbox_class.inc.php: add methods orderSentWork, orderReceivedWork en _cmpWork and propery _orderBy to class Dropbox_person to take care of sorting
- index.php: add selectionlist to headers of sent/received lists to select "order by" and add code to keep selected value in sessionvar.
- index.php: moved part of a <a> hyperlink to previous line to remove the underlined space between symbol and title of a work entry in the sent/received list
- index.php: add filesize info in sent/received lists
- dropbox_submit.php: resubmit prevention only for GET action, because it gives some annoying behaviour in POST situation: white screen in IE6

Version 1.2
-----------
- adapted entire dropbox tool so it can be used as a default tool in Dokeos 1.5
- index.php: add event registration to log use of tool in stats tables
- index.php: upload form checks for correct user selection and file specification before uploading the script
- dropbox_init1.inc.php: added dropbox_cnf["allowOverwrite"] to allow or disallow overwriting of files
- index.php: author name textbox is automatically filled in
- mailing functionality (René Haentjens)
- allowStudentToStudent and allowJustUpload options (id.)
- help in separate window (id.)

Version 1.3 (Patrick Cool)
--------------------------
- sortable table
- categories
- fixing a security hole
- tabs (which can be disabled: see $dropbox_cnf['sent_received_tabs'])
- same action on multiple documents ([zip]download, move, delete)
- consistency with the docuements tool (open/download file, icons of documents, ...)
- zip download of complete folder

Version 1.4 (Yannick Warnier)
-----------------------------
- removed all self-built database tables names


 */

/*	INIT SECTION */

// The file that contains all the initialisation stuff (and includes all the configuration stuff)
require_once 'dropbox_init.inc.php';

// get the last time the user accessed the tool
if ($_SESSION[$_course['id']]['last_access'][TOOL_DROPBOX] == '') {
	$last_access = get_last_tool_access(TOOL_DROPBOX, api_get_course_int_id(), $_user['user_id']);
	$_SESSION[$_course['id']]['last_access'][TOOL_DROPBOX] = $last_access;
} else {
	$last_access = $_SESSION[$_course['id']]['last_access'][TOOL_DROPBOX];
}

// Do the tracking
event_access_tool(TOOL_DROPBOX);

// This var is used to give a unique value to every page request. This is to prevent resubmiting data
$dropbox_unid = md5(uniqid(rand(), true));

/*	DISPLAY SECTION */
Display::display_introduction_section(TOOL_DROPBOX);

// Build URL-parameters for table-sorting
$sort_params = array();
if (isset($_GET['dropbox_column'])) {
    $sort_params[] = 'dropbox_column='.$_GET['dropbox_column'];
}
if (isset($_GET['dropbox_page_nr'])) {
    $sort_params[] = 'page_nr='.intval($_GET['page_nr']);
}
if (isset($_GET['dropbox_per_page'])) {
    $sort_params[] = 'dropbox_per_page='.intval($_GET['dropbox_per_page']);
}
if (isset($_GET['dropbox_direction'])) {
    $sort_params[] = 'dropbox_direction='.$_GET['dropbox_direction'];
}

$sort_params = Security::remove_XSS(implode('&', $sort_params));

$action = isset($_GET['action']) ? $_GET['action'] : null;
/*	ACTIONS: add a dropbox file, add a dropbox category. */

// Display the form for adding a new dropbox item.
if ($action == 'add') {
	if (api_get_session_id() != 0 && !api_is_allowed_to_session_edit(false, true)) {
		api_not_allowed();
	}
	display_add_form();
}

if (isset($_POST['submitWork'])) {
	$check = Security::check_token();
	if ($check) {
        $message = store_add_dropbox();
        if (!empty($message)) {
            Display :: display_confirmation_message($message);
        }
	}
}

// Display the form for adding a category
if ($action == 'addreceivedcategory' or $action == 'addsentcategory') {
	if (api_get_session_id() != 0 && !api_is_allowed_to_session_edit(false, true)) {
		api_not_allowed();
	}
	display_addcategory_form($_POST['category_name'],'',$_GET['action']);
}

// Editing a category: displaying the form
if ($action == 'editcategory' and isset($_GET['id'])) {
	if (api_get_session_id() != 0 && !api_is_allowed_to_session_edit(false, true)) {
		api_not_allowed();
	}
	if (!$_POST) {
		if (api_get_session_id() != 0 && !api_is_allowed_to_session_edit(false, true)) {
			api_not_allowed();
		}
		display_addcategory_form('', $_GET['id'], 'editcategory');
	}
}

// Storing a new or edited category
if (isset($_POST['StoreCategory'])) {
	if (api_get_session_id() != 0 && !api_is_allowed_to_session_edit(false, true)) {
		api_not_allowed();
	}
	$return_information = store_addcategory();
	if ($return_information['type'] == 'confirmation') {
		Display :: display_confirmation_message($return_information['message']);
	}
	if ($return_information['type'] == 'error') {
		Display :: display_error_message(get_lang('FormHasErrorsPleaseComplete').'<br />'.$return_information['message']);
		display_addcategory_form($_POST['category_name'], $_POST['edit_id'], $_POST['action']);
	}
}


// Move a File
if (($action == 'movesent' OR $action == 'movereceived') AND isset($_GET['move_id'])) {
	if (api_get_session_id() != 0 && !api_is_allowed_to_session_edit(false, true)) {
		api_not_allowed();
	}
	display_move_form(str_replace('move', '', $action), $_GET['move_id'], get_dropbox_categories(str_replace('move', '', $action)), $sort_params);
}
if (isset($_POST['do_move'])) {
	Display :: display_confirmation_message(store_move($_POST['id'], $_POST['move_target'], $_POST['part']));
}

// Delete a file
if (($action == 'deletereceivedfile' OR $action == 'deletesentfile') AND isset($_GET['id']) AND is_numeric($_GET['id'])) {
	if (api_get_session_id() != 0 && !api_is_allowed_to_session_edit(false, true)) {
		api_not_allowed();
	}
	$dropboxfile = new Dropbox_Person(api_get_user_id(), api_is_course_admin(), $is_courseTutor);
	if ($action == 'deletereceivedfile') {
		$dropboxfile->deleteReceivedWork($_GET['id']);
		$message = get_lang('ReceivedFileDeleted');
	}
	if ($action == 'deletesentfile') {
		$dropboxfile->deleteSentWork($_GET['id']);
		$message = get_lang('SentFileDeleted');
	}
	Display :: display_confirmation_message($message);
}

// Delete a category
if (($action == 'deletereceivedcategory' OR $action == 'deletesentcategory') AND isset($_GET['id']) AND is_numeric($_GET['id'])) {
	if (api_get_session_id() != 0 && !api_is_allowed_to_session_edit(false, true)) {
		api_not_allowed();
	}
	$message = delete_category($action, $_GET['id']);
	Display :: display_confirmation_message($message);
}

// Do an action on multiple files
// only the download has is handled separately in dropbox_init_inc.php because this has to be done before the headers are sent
// (which also happens in dropbox_init.inc.php

if (!isset($_POST['feedback']) && (strstr($_POST['action'], 'move_received') OR
    $_POST['action'] == 'delete_received' OR $_POST['action'] == 'download_received' OR
    $_POST['action'] == 'delete_sent' OR $_POST['action'] == 'download_sent')) {

	$display_message = handle_multiple_actions();
	Display :: display_normal_message($display_message);
}

// Store Feedback

if (isset($_POST['feedback'])) {
	if (api_get_session_id() != 0 && !api_is_allowed_to_session_edit(false, true)) {
		api_not_allowed();
	}
	$check = Security::check_token();
	if ($check) {
		$display_message = store_feedback();
		Display :: display_normal_message($display_message);
		Security::check_token();
	}
}

// Error Message
if (isset($_GET['error']) AND !empty($_GET['error'])) {
	Display :: display_normal_message(get_lang($_GET['error']));
}


if ($action != 'add') {

	// Getting all the categories in the dropbox for the given user
	$dropbox_categories = get_dropbox_categories();
	// Greating the arrays with the categories for the received files and for the sent files
	foreach ($dropbox_categories as $category) {
		if ($category['received'] == '1') {
			$dropbox_received_category[] = $category;
		}
		if ($category['sent'] == '1') {
			$dropbox_sent_category[] = $category;
		}
	}

	// ACTIONS
	if ($_GET['view'] == 'received' OR !$dropbox_cnf['sent_received_tabs']) {
		//echo '<h3>'.get_lang('ReceivedFiles').'</h3>';

		// This is for the categories
		if (isset($_GET['view_received_category']) AND $_GET['view_received_category'] != '') {
			$view_dropbox_category_received = Security::remove_XSS($_GET['view_received_category']);
		} else {
			$view_dropbox_category_received = 0;
		}

		/* Menu Received */

		if (api_get_session_id() == 0) {
			echo '<div class="actions">';
			if ($view_dropbox_category_received != 0  && api_is_allowed_to_session_edit(false, true)) {
				echo '<a href="'.api_get_self().'?'.api_get_cidreq().'&view_received_category=0&amp;view_sent_category='.Security::remove_XSS($_GET['view_sent_category']).'&amp;view='.Security::remove_XSS($_GET['view']).'">'.Display::return_icon('folder_up.png', get_lang('Up').' '.get_lang('Root'),'',ICON_SIZE_MEDIUM)."</a>";
				echo get_lang('Category').': <strong>'.Security::remove_XSS($dropbox_categories[$view_dropbox_category_received]['cat_name']).'</strong> ';
				$movelist[0] = 'Root'; // move_received selectbox content
			} else {
				echo '<a href="'.api_get_self().'?'.api_get_cidreq().'&action=addreceivedcategory&view='.Security::remove_XSS($_GET['view']).'">'.Display::return_icon('new_folder.png', get_lang('AddNewCategory'),'',ICON_SIZE_MEDIUM).'</a>';
			}
			echo '</div>';
		} else {
			if (api_is_allowed_to_session_edit(false, true)) {
				echo '<div class="actions">';
				if ($view_dropbox_category_received != 0 && api_is_allowed_to_session_edit(false, true)) {
					echo '<a href="'.api_get_self().'?'.api_get_cidreq().'&view_received_category=0&amp;view_sent_category='.Security::remove_XSS($_GET['view_sent_category']).'&amp;view='.Security::remove_XSS($_GET['view']).'">'.Display::return_icon('folder_up.png', get_lang('Up').' '.get_lang('Root'),'',ICON_SIZE_MEDIUM)."</a>";
					echo get_lang('Category').': <strong>'.Security::remove_XSS($dropbox_categories[$view_dropbox_category_received]['cat_name']).'</strong> ';
					$movelist[0] = 'Root'; // move_received selectbox content
				} else {
					echo '<a href="'.api_get_self().'?'.api_get_cidreq().'&action=addreceivedcategory&view='.Security::remove_XSS($_GET['view']).'">'.Display::return_icon('new_folder.png', get_lang('AddNewCategory'),'',ICON_SIZE_MEDIUM).'</a>';
				}
				echo '</div>';
			}
		}
	}

	if (!$_GET['view'] OR $_GET['view'] == 'sent' OR !$dropbox_cnf['sent_received_tabs']) {
		// This is for the categories
		if (isset($_GET['view_sent_category']) AND $_GET['view_sent_category'] != '') {
			$view_dropbox_category_sent = $_GET['view_sent_category'];
		} else {
			$view_dropbox_category_sent = 0;
		}

		/* Menu Sent */

		if (api_get_session_id() == 0) {
			echo '<div class="actions">';
			if ($view_dropbox_category_sent != 0) {
				echo '<a href="'.api_get_self().'?'.api_get_cidreq().'&view_received_category='.Security::remove_XSS($_GET['view_received_category']).'&amp;view_sent_category=0&amp;view='.Security::remove_XSS($_GET['view']).'">'.Display::return_icon('folder_up.png', get_lang('Up').' '.get_lang('Root'),'',ICON_SIZE_MEDIUM)."</a>";
				echo get_lang('Category').': <strong>'.Security::remove_XSS($dropbox_categories[$view_dropbox_category_sent]['cat_name']).'</strong> ';
			} else {
				echo "<a href=\"".api_get_self()."?".api_get_cidreq()."&view=".Security::remove_XSS($_GET['view'])."&amp;action=addsentcategory\">".Display::return_icon('new_folder.png', get_lang('AddNewCategory'),'',ICON_SIZE_MEDIUM)."</a>\n";
			}
			if (empty($_GET['view_sent_category'])) {
				echo "<a href=\"".api_get_self()."?".api_get_cidreq()."&view=".Security::remove_XSS($_GET['view'])."&amp;action=add\">".Display::return_icon('upload_file.png', get_lang('UploadNewFile'),'',ICON_SIZE_MEDIUM)."</a>";
			}
			echo '</div>';
		} else {
			if (api_is_allowed_to_session_edit(false, true)) {
				echo '<div class="actions">';
				if ($view_dropbox_category_sent != 0) {
					echo get_lang('CurrentlySeeing').': <strong>'.Security::remove_XSS($dropbox_categories[$view_dropbox_category_sent]['cat_name']).'</strong> ';
					echo '<a href="'.api_get_self().'?'.api_get_cidreq().'&view_received_category='.Security::remove_XSS($_GET['view_received_category']).'&amp;view_sent_category=0&amp;view='.Security::remove_XSS($_GET['view']).'">'.Display::return_icon('folder_up.png', get_lang('Up').' '.get_lang('Root'),'',ICON_SIZE_MEDIUM)."</a>";
				} else {
					echo "<a href=\"".api_get_self()."?".api_get_cidreq()."&view=".Security::remove_XSS($_GET['view'])."&amp;action=addsentcategory\">".Display::return_icon('new_folder.png', get_lang('AddNewCategory'),'',ICON_SIZE_MEDIUM)."</a>\n";
				}
				if (empty($_GET['view_sent_category'])) {
					echo "<a href=\"".api_get_self()."?".api_get_cidreq()."&view=".Security::remove_XSS($_GET['view'])."&amp;action=add\">".Display::return_icon('upload_file.png', get_lang('UploadNewFile'),'',ICON_SIZE_MEDIUM)."</a>";
				}
				echo '</div>';
			}
		}
	}

	/*	THE MENU TABS */

	if ($dropbox_cnf['sent_received_tabs']) {
?>

<ul class="nav nav-tabs">
    <li <?php if (!$_GET['view'] OR $_GET['view'] == 'sent') { echo 'class="active"'; } ?> >
        <a href="index.php?<?php echo api_get_cidreq(); ?>&view=sent" ><?php echo get_lang('SentFiles'); ?></a></li>
    <li <?php if ($_GET['view'] == 'received') { echo 'class="active"'; } ?> >
        <a href="index.php?<?php echo api_get_cidreq(); ?>&view=received"  ><?php echo get_lang('ReceivedFiles'); ?></a></li>
</ul>

<?php
	}

	/*	RECEIVED FILES */

	if ($_GET['view'] == 'received' OR !$dropbox_cnf['sent_received_tabs']) {
		// This is for the categories
		if (isset($_GET['view_received_category']) AND $_GET['view_received_category'] != '') {
			$view_dropbox_category_received = $_GET['view_received_category'];
		} else {
			$view_dropbox_category_received = 0;
		}

		// Object initialisation
		$dropbox_person = new Dropbox_Person(api_get_user_id(), api_is_course_admin(), $is_courseTutor); // note: are the $is_courseAdmin and $is_courseTutor parameters needed????

		// Constructing the array that contains the total number of feedback messages per document.
		$number_feedback = get_total_number_feedback();

		// Sorting and paging options
		$sorting_options = array();
		$paging_options = array();

		// The headers of the sortable tables
		$column_header = array();
		$column_header[] = array('', false, '');
		$column_header[] = array(get_lang('Type'), true, 'style="width:40px"', 'style="text-align:center"');
		$column_header[] = array(get_lang('ReceivedTitle'), true, '');
		$column_header[] = array(get_lang('Size'), true, '');
		$column_header[] = array(get_lang('Authors'), true, '');
		$column_header[] = array(get_lang('LastResent'), true);

		if (api_get_session_id() == 0) {
			$column_header[] = array(get_lang('Modify'), false, '', 'nowrap style="text-align: right"');
		} elseif (api_is_allowed_to_session_edit(false,true)) {
			$column_header[] = array(get_lang('Modify'), false, '', 'nowrap style="text-align: right"');
		}

		$column_header[] = array('RealDate', true);
		$column_header[] = array('RealSize', true);

		// An array with the setting of the columns -> 1: columns that we will show, 0:columns that will be hide
		$column_show[] = 1;
		$column_show[] = 1;
		$column_show[] = 1;
		$column_show[] = 1;
		$column_show[] = 1;
		$column_show[] = 1;

		if (api_get_session_id() == 0) {
			$column_show[] = 1;
		} elseif (api_is_allowed_to_session_edit(false, true)) {
			$column_show[] = 1;
		}
		$column_show[] = 0;

		// Here we change the way how the colums are going to be sort
		// in this case the the column of LastResent ( 4th element in $column_header) we will be order like the column RealDate
		// because in the column RealDate we have the days in a correct format "2008-03-12 10:35:48"

		$column_order[3] = 8;
		$column_order[5] = 7;


		// The content of the sortable table = the received files
		foreach ($dropbox_person -> receivedWork as $dropbox_file) {
			$dropbox_file_data = array();
			if ($view_dropbox_category_received == $dropbox_file->category) {
                // we only display the files that are in the category that we are in.
				$dropbox_file_data[] = $dropbox_file->id;

				if (!is_array($_SESSION['_seen'][$_course['id']][TOOL_DROPBOX])) {
					$_SESSION['_seen'][$_course['id']][TOOL_DROPBOX] = array();
				}

				// New icon
				$new_icon = '';
				if ($dropbox_file->last_upload_date > $last_access AND !in_array($dropbox_file->id, $_SESSION['_seen'][$_course['id']][TOOL_DROPBOX])) {
					$new_icon = '&nbsp;'.Display::return_icon('new_dropbox_message.png', get_lang('New'),'',ICON_SIZE_SMALL);
				}

				$link_open = '<a href="dropbox_download.php?'.api_get_cidreq().'&amp;id='.$dropbox_file->id.'">';
				$dropbox_file_data[] = $link_open.build_document_icon_tag('file', $dropbox_file->title).'</a>';
				$dropbox_file_data[] = '<a href="dropbox_download.php?'.api_get_cidreq().'&id='.$dropbox_file->id.'&amp;action=download">'.Display::return_icon('save.png', get_lang('Download'), array('style' => 'float:right;'),ICON_SIZE_SMALL).'</a>'.$link_open.$dropbox_file->title.'</a>'.$new_icon.'<br />'.$dropbox_file->description;
				$file_size = $dropbox_file->filesize;
				$dropbox_file_data[] = Text::format_file_size($file_size);
				$dropbox_file_data[] = $dropbox_file->author;
				//$dropbox_file_data[] = $dropbox_file->description;

				$last_upload_date = api_get_local_time($dropbox_file->last_upload_date);
				$dropbox_file_data[] = date_to_str_ago($last_upload_date).'<br /><span class="dropbox_date">'.api_format_date($last_upload_date).'</span>';

				$action_icons = check_number_feedback($dropbox_file->id, $number_feedback).' '.get_lang('Feedback').'
									<a href="'.api_get_self().'?'.api_get_cidreq().'&view_received_category='.Security::remove_XSS($_GET['view_received_category']).'&amp;view_sent_category='.Security::remove_XSS($_GET['view_sent_category']).'&amp;view='.Security::remove_XSS($_GET['view']).'&amp;action=viewfeedback&amp;id='.$dropbox_file->id.'&'.$sort_params.'">'.Display::return_icon('discuss.png', get_lang('Comment'),'',ICON_SIZE_SMALL).'</a>
									<a href="'.api_get_self().'?'.api_get_cidreq().'&view_received_category='.Security::remove_XSS($_GET['view_received_category']).'&amp;view_sent_category='.Security::remove_XSS($_GET['view_sent_category']).'&amp;view='.Security::remove_XSS($_GET['view']).'&amp;action=movereceived&amp;move_id='.$dropbox_file->id.'&'.$sort_params.'">'.Display::return_icon('move.png', get_lang('Move'),'',ICON_SIZE_SMALL).'</a>
									<a href="'.api_get_self().'?'.api_get_cidreq().'&view_received_category='.Security::remove_XSS($_GET['view_received_category']).'&amp;view_sent_category='.Security::remove_XSS($_GET['view_sent_category']).'&amp;view='.Security::remove_XSS($_GET['view']).'&amp;action=deletereceivedfile&amp;id='.$dropbox_file->id.'&'.$sort_params.'" onclick="javascript: return confirmation(\''.$dropbox_file->title.'\');">'.
                                    Display::return_icon('delete.png', get_lang('Delete'),'',ICON_SIZE_SMALL).'</a>';

				// This is a hack to have an additional row in a sortable table

				if ($action == 'viewfeedback' AND isset($_GET['id']) and is_numeric($_GET['id']) AND $dropbox_file->id == $_GET['id']) {
					$action_icons .= "</td></tr>"; // Ending the normal row of the sortable table
					$action_icons .= '<tr><td colspan="2"><a href="index.php?"'.api_get_cidreq().'&view_received_category='.Security::remove_XSS($_GET['view_received_category'])."&amp;view_sent_category=".Security::remove_XSS($_GET['view_sent_category'])."&amp;view=".Security::remove_XSS($_GET['view']).'&'.$sort_params."\">".get_lang('CloseFeedback')."</a></td><td colspan=\"7\">".feedback($dropbox_file->feedback2)."</td></tr>";
				}
				if (api_get_session_id() == 0) {
					$dropbox_file_data[] = $action_icons;
				} elseif (api_is_allowed_to_session_edit(false, true)) {
					$dropbox_file_data[] = $action_icons;
				}
				$action_icons = '';
				$dropbox_file_data[] = $last_upload_date;
				$dropbox_file_data[] = $file_size;
				$dropbox_data_recieved[] = $dropbox_file_data;
			}
		}

		// The content of the sortable table = the categories (if we are not in the root)
		if ($view_dropbox_category_received == 0) {
			foreach ($dropbox_categories as $category) { // Note: This can probably be shortened since the categories for the received files are already in the $dropbox_received_category array;
				$dropbox_category_data = array();
				if ($category['received'] == '1') {
					$movelist[$category['cat_id']] = $category['cat_name'];
					$dropbox_category_data[] = $category['cat_id']; // This is where the checkbox icon for the files appear
					// The icon of the category
					$link_open = '<a href="'.api_get_self().'?'.api_get_cidreq().'&view_received_category='.$category['cat_id'].'&amp;view_sent_category='.Security::remove_XSS($_GET['view_sent_category']).'&amp;view='.Security::remove_XSS($_GET['view']).'">';
					$dropbox_category_data[] = $link_open.build_document_icon_tag('folder', $category['cat_name']).'</a>';
					$dropbox_category_data[] = '<a href="dropbox_download.php?'.api_get_cidreq().'&cat_id='.$category['cat_id'].'&amp;action=downloadcategory&amp;sent_received=received">'.Display::return_icon('save_pack.png', get_lang('Save'), array('style' => 'float:right;'),ICON_SIZE_SMALL).'</a>'.$link_open.$category['cat_name'].'</a>';
					$dropbox_category_data[] = '';
					$dropbox_category_data[] = '';
					$dropbox_category_data[] = '';
					$dropbox_category_data[] = '<a href="'.api_get_self().'?'.api_get_cidreq().'&view_received_category='.Security::remove_XSS($_GET['view_received_category']).'&amp;view_sent_category='.Security::remove_XSS($_GET['view_sent_category']).'&amp;view='.Security::remove_XSS($_GET['view']).'&amp;action=editcategory&amp;id='.$category['cat_id'].'">'.Display::return_icon('edit.png',get_lang('Edit'),'',ICON_SIZE_SMALL).'</a>
										  <a href="'.api_get_self().'?'.api_get_cidreq().'&view_received_category='.Security::remove_XSS($_GET['view_received_category']).'&amp;view_sent_category='.Security::remove_XSS($_GET['view_sent_category']).'&amp;view='.Security::remove_XSS($_GET['view']).'&amp;action=deletereceivedcategory&amp;id='.$category['cat_id'].'" onclick="javascript: return confirmation(\''.Security::remove_XSS($category['cat_name']).'\');">'.Display::return_icon('delete.png', get_lang('Delete'),'',ICON_SIZE_SMALL).'</a>';
				}
				if (is_array($dropbox_category_data) && count($dropbox_category_data) > 0) {
					$dropbox_data_recieved[] = $dropbox_category_data;
				}
			}
		}
		// Displaying the table
		$additional_get_parameters = array('view' => $_GET['view'], 'view_received_category' => $_GET['view_received_category'], 'view_sent_category' => $_GET['view_sent_category']);
		$selectlist = array('delete_received' => get_lang('Delete'), 'download_received' => get_lang('Download'));
		if (is_array($movelist)) {
			foreach ($movelist as $catid => $catname){
				$selectlist['move_received_'.$catid] = get_lang('Move') . '->'. Security::remove_XSS($catname);
			}
		}

		if (api_get_session_id() != 0 && !api_is_allowed_to_session_edit(false, true)) {
			$selectlist = array();
		}

		Display::display_sortable_config_table('dropbox', $column_header, $dropbox_data_recieved, $sorting_options, $paging_options, $additional_get_parameters, $column_show, $column_order, $selectlist);
	}

	/*	SENT FILES */

	if (!$_GET['view'] OR $_GET['view'] == 'sent' OR !$dropbox_cnf['sent_received_tabs']) {
		// This is for the categories
		if (isset($_GET['view_sent_category']) AND $_GET['view_sent_category'] != '') {
			$view_dropbox_category_sent = $_GET['view_sent_category'];
		} else {
			$view_dropbox_category_sent = 0;
		}

		// Object initialisation
		$dropbox_person = new Dropbox_Person(api_get_user_id(), api_is_course_admin(), $is_courseTutor);

		// Constructing the array that contains the total number of feedback messages per document.
		$number_feedback = get_total_number_feedback();

		// Sorting and paging options
		$sorting_options = array();
		$paging_options = array();

		// The headers of the sortable tables
		$column_header = array();

		$column_header[] = array('', false, '');
		$column_header[] = array(get_lang('Type'), true, 'style="width:40px"', 'style="text-align:center"');
		$column_header[] = array(get_lang('SentTitle'), true, '');
		$column_header[] = array(get_lang('Size'), true, '');
		$column_header[] = array(get_lang('SentTo'), true, '');
		$column_header[] = array(get_lang('LastResent'), true, '');

		if (api_get_session_id() == 0) {
			$column_header[] = array(get_lang('Modify'), false, '', 'nowrap style="text-align: right"');
		} elseif (api_is_allowed_to_session_edit(false, true)) {
			$column_header[] = array(get_lang('Modify'), false, '', 'nowrap style="text-align: right"');
		}

		$column_header[] = array('RealDate', true);
		$column_header[] = array('RealSize', true);

		$column_show = array();
		$column_order = array();

		// An array with the setting of the columns -> 1: columns that we will show, 0:columns that will be hide
		$column_show[] = 1;
		$column_show[] = 1;
		$column_show[] = 1;
		$column_show[] = 1;
		$column_show[] = 1;
		$column_show[] = 1;
		if (api_get_session_id() == 0) {
			$column_show[] = 1;
		} elseif (api_is_allowed_to_session_edit(false, true)) {
			$column_show[] = 1;
		}
		$column_show[] = 0;

		// Here we change the way how the colums are going to be sort
		// in this case the the column of LastResent ( 4th element in $column_header) we will be order like the column RealDate
		// because in the column RealDate we have the days in a correct format "2008-03-12 10:35:48"

		$column_order[3] = 8;
		$column_order[5] = 7;

		// The content of the sortable table = the received files
		foreach ($dropbox_person -> sentWork as $dropbox_file) {
			$dropbox_file_data = array();

			if ($view_dropbox_category_sent == $dropbox_file->category) {
				$dropbox_file_data[] = $dropbox_file->id;
				$link_open = '<a href="dropbox_download.php?'.api_get_cidreq().'&id='.$dropbox_file->id.'">';
				$dropbox_file_data[] = $link_open.build_document_icon_tag('file', $dropbox_file->title).'</a>';
				$dropbox_file_data[] = '<a href="dropbox_download.php?'.api_get_cidreq().'&id='.$dropbox_file->id.'&amp;action=download">'.Display::return_icon('save.png', get_lang('Save'), array('style' => 'float:right;'),ICON_SIZE_SMALL).'</a>'.$link_open.$dropbox_file->title.'</a><br />'.$dropbox_file->description;
				$file_size = $dropbox_file->filesize;
				$dropbox_file_data[] = Text::format_file_size($file_size);
				foreach ($dropbox_file->recipients as $recipient) {
					$receivers_celldata = display_user_link_work($recipient['user_id'], $recipient['name']).', '.$receivers_celldata;
				}
				$receivers_celldata = trim(trim($receivers_celldata), ','); // Removing the trailing comma.
				$dropbox_file_data[] = $receivers_celldata;
				$last_upload_date = api_get_local_time($dropbox_file->last_upload_date);
				$dropbox_file_data[] = date_to_str_ago($last_upload_date).'<br /><span class="dropbox_date">'.api_format_date($last_upload_date).'</span>';

				//$dropbox_file_data[] = $dropbox_file->author;
				$receivers_celldata = '';

				$action_icons = check_number_feedback($dropbox_file->id, $number_feedback).' '.get_lang('Feedback').'
									<a href="'.api_get_self().'?'.api_get_cidreq().'&view_received_category='.Security::remove_XSS($_GET['view_received_category']).'&amp;view_sent_category='.Security::remove_XSS($_GET['view_sent_category']).'&amp;view='.Security::remove_XSS($_GET['view']).'&amp;action=viewfeedback&amp;id='.$dropbox_file->id.'&'.$sort_params.'">'.Display::return_icon('discuss.png', get_lang('Comment'),'',ICON_SIZE_SMALL).'</a>
									<a href="'.api_get_self().'?'.api_get_cidreq().'&view_received_category='.Security::remove_XSS($_GET['view_received_category']).'&amp;view_sent_category='.Security::remove_XSS($_GET['view_sent_category']).'&amp;view='.Security::remove_XSS($_GET['view']).'&amp;action=movesent&amp;move_id='.$dropbox_file->id.'&'.$sort_params.'">'.Display::return_icon('move.png', get_lang('Move'),'',ICON_SIZE_SMALL).'</a>
									<a href="'.api_get_self().'?'.api_get_cidreq().'&view_received_category='.Security::remove_XSS($_GET['view_received_category']).'&amp;view_sent_category='.Security::remove_XSS($_GET['view_sent_category']).'&amp;view='.Security::remove_XSS($_GET['view']).'&amp;action=deletesentfile&amp;id='.$dropbox_file->id.'&'.$sort_params.'" onclick="javascript: return confirmation(\''.$dropbox_file->title.'\');">'.Display::return_icon('delete.png', get_lang('Delete'),'',ICON_SIZE_SMALL).'</a>';
				// This is a hack to have an additional row in a sortable table
				if ($action == 'viewfeedback' && isset($_GET['id']) && is_numeric($_GET['id']) && $dropbox_file->id == $_GET['id']) {
					$action_icons .= "</td></tr>\n"; // ending the normal row of the sortable table
					$action_icons .= "<tr><td colspan=\"2\">";
					$action_icons .= "<a href=\"index.php?".api_get_cidreq()."&view_received_category=".Security::remove_XSS($_GET['view_received_category'])."&view_sent_category=".Security::remove_XSS($_GET['view_sent_category'])."&view=".Security::remove_XSS($_GET['view']).'&'.$sort_params."\">".get_lang('CloseFeedback')."</a>";
					$action_icons .= "</td><td colspan=\"7\">".feedback($dropbox_file->feedback2)."</td></tr>";
				}
				$dropbox_file_data[] = $action_icons;
				$dropbox_file_data[] = $last_upload_date;
				$dropbox_file_data[] = $file_size;
				$action_icons = '';
				$dropbox_data_sent[] = $dropbox_file_data;
			}
		}

		// The content of the sortable table = the categories (if we are not in the root)
		if ($view_dropbox_category_sent == 0) {
			foreach ($dropbox_categories as $category) {
				$dropbox_category_data = array();
				if ($category['sent'] == '1') {
					$dropbox_category_data[] = $category['cat_id']; // This is where the checkbox icon for the files appear.
					$link_open = '<a href="'.api_get_self().'?'.api_get_cidreq().'&view_received_category='.Security::remove_XSS($_GET['view_received_category']).'&amp;view_sent_category='.$category['cat_id'].'&amp;view='.Security::remove_XSS($_GET['view']).'">';
					$dropbox_category_data[] = $link_open.build_document_icon_tag('folder', Security::remove_XSS($category['cat_name'])).'</a>';
					$dropbox_category_data[] = '<a href="dropbox_download.php?'.api_get_cidreq().'&cat_id='.$category['cat_id'].'&amp;action=downloadcategory&amp;sent_received=sent">'.Display::return_icon('save_pack.png', get_lang('Save'), array('style' => 'float:right;'),ICON_SIZE_SMALL).'</a>'.$link_open.Security::remove_XSS($category['cat_name']).'</a>';
					//$dropbox_category_data[] = '';
					$dropbox_category_data[] = '';
					//$dropbox_category_data[] = '';
					$dropbox_category_data[] = '';
					$dropbox_category_data[] = '';
					$dropbox_category_data[] = '<a href="'.api_get_self().'?'.api_get_cidreq().'&view_received_category='.Security::remove_XSS($_GET['view_received_category']).'&amp;view_sent_category='.Security::remove_XSS($_GET['view_sent_category']).'&amp;view='.Security::remove_XSS($_GET['view']).'&amp;action=editcategory&id='.$category['cat_id'].'">'.
                                    Display::return_icon('edit.png', get_lang('Edit'),'',ICON_SIZE_SMALL).'</a>
									<a href="'.api_get_self().'?'.api_get_cidreq().'&view_received_category='.Security::remove_XSS($_GET['view_received_category']).'&amp;view_sent_category='.Security::remove_XSS($_GET['view_sent_category']).'&amp;view='.Security::remove_XSS($_GET['view']).'&amp;action=deletesentcategory&amp;id='.$category['cat_id'].'" onclick="javascript: return confirmation(\''.Security::remove_XSS($category['cat_name']).'\');">'.
                                    Display::return_icon('delete.png', get_lang('Delete'),'',ICON_SIZE_SMALL).'</a>';
				}
				if (is_array($dropbox_category_data) && count($dropbox_category_data) > 0) {
					$dropbox_data_sent[] = $dropbox_category_data;
				}
			}
		}
		// Displaying the table
		$additional_get_parameters = array('view' => Security::remove_XSS($_GET['view']), 'view_received_category' => Security::remove_XSS($_GET['view_received_category']), 'view_sent_category' => Security::remove_XSS($_GET['view_sent_category']));
		$selectlist = array('delete_received' => get_lang('Delete'), 'download_received' => get_lang('Download'));
		if (api_get_session_id() != 0 && !api_is_allowed_to_session_edit(false, true)) {
			$selectlist = array('download_received' => get_lang('Download'));
		}
		Display::display_sortable_config_table('dropbox', $column_header, $dropbox_data_sent, $sorting_options, $paging_options, $additional_get_parameters, $column_show, $column_order, $selectlist);
	}

}

Display::display_footer();