chamilo-lms2/main/admin/user_list.php

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

/**
 * @author Bart Mollet
 * @author Julio Montoya <gugli100@gmail.com> BeezNest 2011
 * @package chamilo.admin
*/

use ChamiloSession as Session;

$cidReset = true;
require_once '../inc/global.inc.php';

$current_access_url_id = api_get_current_access_url_id();

$action = isset($_REQUEST["action"]) ? $_REQUEST["action"] : null;

// Blocks the possibility to delete a user
$deleteUserAvailable = true;
if (api_get_configuration_value('deny_delete_users')) {
    $deleteUserAvailable = false;
}

$url = api_get_path(WEB_AJAX_PATH).'course.ajax.php?a=get_user_courses';
$urlSession = api_get_path(WEB_AJAX_PATH).'session.ajax.php?a=get_user_sessions';

$htmlHeadXtra[] = '<script>
function load_course_list (div_course,my_user_id) {
	 $.ajax({
		contentType: "application/x-www-form-urlencoded",
		beforeSend: function(objeto) {
            $("div#"+div_course).html("<img src=\'../inc/lib/javascript/indicator.gif\' />"); },
		type: "POST",
		url: "'.$url.'",
		data: "user_id="+my_user_id,
		success: function(datos) {
			$("div#"+div_course).html(datos);
			$("div#div_"+my_user_id).attr("class","blackboard_show");
			$("div#div_"+my_user_id).attr("style","");
		}
	});
}

function load_session_list(div_session, my_user_id) {
	 $.ajax({
		contentType: "application/x-www-form-urlencoded",
		beforeSend: function(objeto) {
            $("div#"+div_session).html("<img src=\'../inc/lib/javascript/indicator.gif\' />"); },
		type: "POST",
		url: "'.$urlSession.'",
		data: "user_id="+my_user_id,
		success: function(datos) {
			$("div#"+div_session).html(datos);
			$("div#div_s_"+my_user_id).attr("class","blackboard_show");
			$("div#div_s_"+my_user_id).attr("style","");
		}
	});
}

function active_user(element_div) {
	id_image=$(element_div).attr("id");
	image_clicked=$(element_div).attr("src");
	image_clicked_info = image_clicked.split("/");
	image_real_clicked = image_clicked_info[image_clicked_info.length-1];
	var status = 1;
	if (image_real_clicked == "accept.png") {
		status = 0;
	}
	user_id=id_image.split("_");
	ident="#img_"+user_id[1];
	if (confirm("'.get_lang('AreYouSureToEditTheUserStatus', '').'")) {
		 $.ajax({
			contentType: "application/x-www-form-urlencoded",
			beforeSend: function(objeto) {
				$(ident).attr("src","'.Display::returnIconPath('loading1.gif').'"); }, //candy eye stuff
			type: "GET",
			url: "'.api_get_path(WEB_AJAX_PATH).'user_manager.ajax.php?a=active_user",
			data: "user_id="+user_id[1]+"&status="+status,
			success: function(data) {
				if (data == 1) {
					$(ident).attr("src", "'.Display::returnIconPath('accept.png').'");
					$(ident).attr("title","'.get_lang('Lock').'");
				}
                if (data == 0) {
					$(ident).attr("src","'.Display::returnIconPath('error.png').'");
					$(ident).attr("title","'.get_lang('Unlock').'");
				}
                if (data == -1) {
                    $(ident).attr("src", "'.Display::returnIconPath('warning.png').'");
					$(ident).attr("title","'.get_lang('ActionNotAllowed').'");
                }
			}
		});
	}
}

function clear_course_list(div_course) {
	$("div#"+div_course).html("&nbsp;");
	$("div#"+div_course).hide("");
}
function clear_session_list(div_session) {
	$("div#"+div_session).html("&nbsp;");
	$("div#"+div_session).hide("");
}

function display_advanced_search_form () {
    if ($("#advanced_search_form").css("display") == "none") {
        $("#advanced_search_form").css("display","block");
        $("#img_plus_and_minus").html(\'&nbsp;'.Display::return_icon('div_hide.gif',get_lang('Hide'),array('style'=>'vertical-align:middle')).'&nbsp;'.get_lang('AdvancedSearch').'\');
    } else {
        $("#advanced_search_form").css("display","none");
        $("#img_plus_and_minus").html(\'&nbsp;'.Display::return_icon('div_show.gif',get_lang('Show'),array('style'=>'vertical-align:middle')).'&nbsp;'.get_lang('AdvancedSearch').'\');
    }
}

$(document).ready(function() {
    var select_val = $("#input_select_extra_data").val();
    if ( document.getElementById(\'extra_data_text\')) {

        if (select_val != 0) {
            document.getElementById(\'extra_data_text\').style.display="block";
            if (document.getElementById(\'input_extra_text\'))
                document.getElementById(\'input_extra_text\').value = "";
        } else {
            document.getElementById(\'extra_data_text\').style.display="none";
        }
    }
});

//Load user calendar
function load_calendar(user_id, month, year) {
 	var url = "'.api_get_path(WEB_AJAX_PATH).'agenda.ajax.php?a=get_user_agenda&user_id=" +user_id + "&month="+month+"&year="+year;
	$(".modal-body").load(url);
}
</script>';

$this_section = SECTION_PLATFORM_ADMIN;

if ($action == 'login_as') {
    $check = Security::check_token('get');
    if (isset($_GET['user_id']) && $check) {
        $result = loginUser($_GET['user_id']);
        if ($result == false) {
            api_not_allowed(true);
        }
    }
    Security::clear_token();
}

api_protect_admin_script(true);

/**
 * Prepares the shared SQL query for the user table.
 * See get_user_data() and get_number_of_users().
 *
 * @param boolean $is_count Whether to count, or get data
 * @return string SQL query
 */
function prepare_user_sql_query($is_count)
{
    $sql = "";
    $user_table = Database::get_main_table(TABLE_MAIN_USER);
    $admin_table = Database::get_main_table(TABLE_MAIN_ADMIN);

    if ($is_count) {
        $sql .= "SELECT COUNT(u.id) AS total_number_of_items FROM $user_table u";
    } else {
        $sql .= "SELECT u.id AS col0, u.official_code AS col2, ";

        if (api_is_western_name_order()) {
            $sql .= "u.firstname AS col3, u.lastname AS col4, ";
        } else {
            $sql .= "u.lastname AS col3, u.firstname AS col4, ";
        }

        $sql .= " u.username AS col5,
                    u.email AS col6,
                    u.status AS col7,
                    u.active AS col8,
                    u.id AS col9,
                    u.registration_date AS col10,
                    u.expiration_date AS exp,
                    u.password
                FROM $user_table u";
    }

    // adding the filter to see the user's only of the current access_url
    if ((api_is_platform_admin() || api_is_session_admin()) && api_get_multiple_access_url()) {
        $access_url_rel_user_table = Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER);
        $sql.= " INNER JOIN $access_url_rel_user_table url_rel_user ON (u.id=url_rel_user.user_id)";
    }

    $keywordList = array(
        'keyword_firstname',
        'keyword_lastname',
        'keyword_username',
        'keyword_email',
        'keyword_officialcode',
        'keyword_status',
        'keyword_active',
        'keyword_inactive',
        'check_easy_passwords'
    );

    $keywordListValues = array();
    $atLeastOne = false;
    foreach ($keywordList as $keyword) {
        $keywordListValues[$keyword] = null;
        if (isset($_GET[$keyword]) && !empty($_GET[$keyword])) {
            $keywordListValues[$keyword] = $_GET[$keyword];
            $atLeastOne = true;
        }
    }

    if ($atLeastOne == false) {
        $keywordListValues = array();
    }

    if (isset($keyword_extra_data) && !empty($keyword_extra_data)) {
        $extra_info = UserManager::get_extra_field_information_by_name($keyword_extra_data);
        $field_id = $extra_info['id'];
        $sql.= " INNER JOIN user_field_values ufv ON u.id=ufv.user_id AND ufv.field_id=$field_id ";
    }

    if (isset($_GET['keyword']) && !empty($_GET['keyword'])) {
        $keywordFiltered = Database::escape_string("%". $_GET['keyword'] ."%");
        $sql .= " WHERE (
                    u.firstname LIKE '$keywordFiltered' OR
                    u.lastname LIKE '$keywordFiltered' OR
                    concat(u.firstname, ' ', u.lastname) LIKE '$keywordFiltered' OR
                    concat(u.lastname,' ',u.firstname) LIKE '$keywordFiltered' OR
                    u.username LIKE '$keywordFiltered' OR
                    u.official_code LIKE '$keywordFiltered' OR
                    u.email LIKE '$keywordFiltered'
                )
        ";
    } elseif (isset($keywordListValues) && !empty($keywordListValues)) {
        $query_admin_table = '';
        $keyword_admin = '';

        if (isset($keywordListValues['keyword_status']) &&
            $keywordListValues['keyword_status'] == PLATFORM_ADMIN
        ) {
            $query_admin_table = " , $admin_table a ";
            $keyword_admin = ' AND a.user_id = u.id ';
            $keywordListValues['keyword_status'] = '%';
        }

        $keyword_extra_value = '';
        if (isset($keyword_extra_data) && !empty($keyword_extra_data) &&
            !empty($keyword_extra_data_text)) {
            $keyword_extra_value = " AND ufv.field_value LIKE '%".trim($keyword_extra_data_text)."%' ";
        }

        $sql .= " $query_admin_table
                WHERE (
                    u.firstname LIKE '". Database::escape_string("%".$keywordListValues['keyword_firstname']."%")."' AND
                    u.lastname LIKE '". Database::escape_string("%".$keywordListValues['keyword_lastname']."%")."' AND
                    u.username LIKE '". Database::escape_string("%".$keywordListValues['keyword_username']."%")."' AND
                    u.email LIKE '". Database::escape_string("%".$keywordListValues['keyword_email']."%")."' AND
                    u.status LIKE '".Database::escape_string($keywordListValues['keyword_status'])."' ";
        if (!empty($keywordListValues['keyword_officialcode'])) {
            $sql .= " AND u.official_code LIKE '" . Database::escape_string("%" . $keywordListValues['keyword_officialcode'] . "%") . "' ";
        }
        $sql .= "
            $keyword_admin
            $keyword_extra_value
        ";

        if (isset($keywordListValues['keyword_active']) && !isset($keywordListValues['keyword_inactive'])) {
            $sql .= " AND u.active = 1";
        } elseif (isset($keywordListValues['keyword_inactive']) && !isset($keywordListValues['keyword_active'])) {
            $sql .= " AND u.active = 0";
        }
        $sql .= " ) ";
    }

    // adding the filter to see the user's only of the current access_url
    if ((api_is_platform_admin() || api_is_session_admin())
        && api_get_multiple_access_url()
    ) {
        $sql .= " AND url_rel_user.access_url_id=".api_get_current_access_url_id();
    }

    return $sql;
}

/**
 * Make sure this function is protected because it does NOT check password!
 *
 * This function defines globals.
 * @param  int $userId
 *
 * @return false|null    False on failure, redirection on success
 * @author Evie Embrechts
 * @author Yannick Warnier <yannick.warnier@dokeos.com>
*/
function loginUser($userId)
{
    $userId = intval($userId);
    $userInfo = api_get_user_info($userId);

    // Check if the user is allowed to 'login_as'
    $canLoginAs = api_can_login_as($userId);

    if (!$canLoginAs || empty($userInfo)) {

        return false;
    }

    $firstname = $userInfo['firstname'];
    $lastname = $userInfo['lastname'];

	if (api_is_western_name_order()) {
		$message = sprintf(get_lang('AttemptingToLoginAs'),$firstname, $lastname, $userId);
	} else {
		$message = sprintf(get_lang('AttemptingToLoginAs'), $lastname, $firstname, $userId);
	}

	if ($userId) {

        // Logout the current user
        LoginDelete(api_get_user_id());

        Session::erase('_user');
        Session::erase('is_platformAdmin');
        Session::erase('is_allowedCreateCourse');
        Session::erase('_uid');
        // Cleaning session variables

        $_user['firstName'] = $userInfo['firstname'];
        $_user['lastName'] = $userInfo['lastname'];
        $_user['mail'] = $userInfo['email'];
        $_user['official_code'] = $userInfo['official_code'];
        $_user['picture_uri'] = $userInfo['picture_uri'];
        $_user['user_id'] = $userId;
        $_user['id'] = $userId;
        $_user['status'] = $userInfo['status'];

        // Filling session variables with new data
        Session::write('_uid', $userId);
        Session::write('_user', $userInfo);
        Session::write('is_platformAdmin', (bool) (UserManager::is_admin($userId)));
        Session::write('is_allowedCreateCourse', (bool) ($userInfo['status'] == 1));
        // will be useful later to know if the user is actually an admin or not (example reporting)
        Session::write('login_as', true);

        $target_url = api_get_path(WEB_PATH)."user_portal.php";
        $message .= '<br />'.sprintf(get_lang('LoginSuccessfulGoToX'),'<a href="'.$target_url.'">'.$target_url.'</a>');
        Display :: display_header(get_lang('UserList'));
        Display :: display_normal_message($message, false);
        Display :: display_footer();
        exit;

	}
}

/**
 * Get the total number of users on the platform
 * @see SortableTable#get_total_number_of_items()
 */
function get_number_of_users()
{
    $sql = prepare_user_sql_query(true);

    $res = Database::query($sql);
    $obj = Database::fetch_object($res);
    return $obj->total_number_of_items;
}

/**
 * Get the users to display on the current page (fill the sortable-table)
 * @param   int     offset of first user to recover
 * @param   int     Number of users to get
 * @param   int     Column to sort on
 * @param   string  Order (ASC,DESC)
 * @see SortableTable#get_table_data($from)
 */
function get_user_data($from, $number_of_items, $column, $direction) {
    $sql = prepare_user_sql_query(false);

    /* @todo will not work because now we use the salt field
    $checkPassStrength = isset($_GET['check_easy_passwords']) && $_GET['check_easy_passwords'] == 1 ? true : false;
    if ($checkPassStrength) {
        $easyPasswordList = api_get_easy_password_list();
        $easyPasswordList = array_map('api_get_encrypted_password', $easyPasswordList);
        $easyPasswordList = array_map(array('Database', 'escape_string'), $easyPasswordList);
        $easyPassword = implode("' OR password LIKE '", $easyPasswordList);

        $sql .= "AND password LIKE '$easyPassword' ";
    }*/

    if (!in_array($direction, array('ASC','DESC'))) {
    	$direction = 'ASC';
    }
    $column = intval($column);
    $from 	= intval($from);
    $number_of_items = intval($number_of_items);

    $preventSessionAdminsToManageAllUsers = api_get_setting('prevent_session_admins_to_manage_all_users');
    if (api_is_session_admin() && $preventSessionAdminsToManageAllUsers === 'true') {
        $sql .= " WHERE u.creator_id = ".api_get_user_id();
    }

	$sql .= " ORDER BY col$column $direction ";
	$sql .= " LIMIT $from,$number_of_items";

	$res = Database::query($sql);

	$users = array ();
    $t = time();
	while ($user = Database::fetch_row($res)) {
		$userPicture = UserManager::getUserPicture($user[0], USER_IMAGE_SIZE_SMALL);
		$photo = '<img src="'.$userPicture.'" width="22" height="22" alt="'.api_get_person_name($user[2], $user[3]).'" title="'.api_get_person_name($user[2], $user[3]).'" />';

        if ($user[7] == 1 && !empty($user[10])) {
            // check expiration date
            $expiration_time = convert_sql_date($user[10]);
            // if expiration date is passed, store a special value for active field
            if ($expiration_time < $t) {
        	   $user[7] = '-1';
            }
        }

        // forget about the expiration date field
        $users[] = array(
            $user[0],
            $photo,
            $user[1],
            $user[2],
            $user[3],
            $user[4],
            $user[5],
            $user[6],
            $user[7],
            api_get_local_time($user[9]),
            $user[0]
        );
	}

	return $users;
}

/**
* Returns a mailto-link
* @param string $email An email-address
* @return string HTML-code with a mailto-link
*/
function email_filter($email) {
	return Display :: encrypted_mailto_link($email, $email);
}

/**
* Returns a mailto-link
* @param string $email An email-address
* @return string HTML-code with a mailto-link
*/
function user_filter($name, $params, $row) {
	return '<a href="'.api_get_path(WEB_PATH).'whoisonline.php?origin=user_list&id='.$row[0].'">'.$name.'</a>';
}

/**
 * Build the modify-column of the table
 * @param   int     The user id
 * @param   string  URL params to add to table links
 * @param   array   Row of elements to alter
 * @return string Some HTML-code with modify-buttons
 */
function modify_filter($user_id, $url_params, $row) {
	global $charset, $_admins_list;
	$is_admin   = in_array($user_id,$_admins_list);
	$statusname = api_get_status_langvars();
	$user_is_anonymous = false;
    $current_user_status_label = $row['7'];

	if ($current_user_status_label == $statusname[ANONYMOUS]) {
		$user_is_anonymous =true;
	}
	$result = '';
	if (!$user_is_anonymous) {
		$icon = Display::return_icon('course.png', get_lang('Courses'), array('onmouseout' => 'clear_course_list (\'div_'.$user_id.'\')'));
		$result .= '<a href="javascript:void(0)" onclick="load_course_list(\'div_'.$user_id.'\','.$user_id.')" >
			        '.$icon.'
					<div class="blackboard_hide" id="div_'.$user_id.'">&nbsp;&nbsp;</div>
					</a>';

        $icon = Display::return_icon('session.png', get_lang('Sessions'), array('onmouseout' => 'clear_session_list (\'div_s_'.$user_id.'\')'));
		$result .= '<a href="javascript:void(0)" onclick="load_session_list(\'div_s_'.$user_id.'\','.$user_id.')" >
					'.$icon.'
					<div class="blackboard_hide" id="div_s_'.$user_id.'">&nbsp;&nbsp;</div>
					</a>';
	} else {
		$result .= Display::return_icon('course_na.png',get_lang('Courses')).'&nbsp;&nbsp;';
		$result .= Display::return_icon('course_na.png',get_lang('Sessions')).'&nbsp;&nbsp;';
	}

	if (api_is_platform_admin()) {
		if (!$user_is_anonymous) {
			$result .= '<a href="user_information.php?user_id='.$user_id.'">'.Display::return_icon('synthese_view.gif', get_lang('Info')).'</a>&nbsp;&nbsp;';
		} else {
			$result .= Display::return_icon('synthese_view_na.gif', get_lang('Info')).'&nbsp;&nbsp;';
		}
	}

    //only allow platform admins to login_as, or session admins only for students (not teachers nor other admins)
    if (api_is_platform_admin() || (api_is_session_admin() && $current_user_status_label == $statusname[STUDENT])) {
    	if (!$user_is_anonymous) {
            if (api_global_admin_can_edit_admin($user_id)) {
                $result .= '<a href="user_list.php?action=login_as&user_id='.$user_id.'&sec_token='.$_SESSION['sec_token'].'">'.Display::return_icon('login_as.png', get_lang('LoginAs')).'</a>&nbsp;&nbsp;';
            } else {
                $result .= Display::return_icon('login_as_na.png', get_lang('LoginAs')).'&nbsp;&nbsp;';
            }
    	} else {
    		$result .= Display::return_icon('login_as_na.png', get_lang('LoginAs')).'&nbsp;&nbsp;';
    	}
    } else {
    	$result .= Display::return_icon('login_as_na.png', get_lang('LoginAs')).'&nbsp;&nbsp;';
    }

	if ($current_user_status_label != $statusname[STUDENT]) {
		$result .= Display::return_icon('statistics_na.gif', get_lang('Reporting')).'&nbsp;&nbsp;';
	} else {
		$result .= '<a href="../mySpace/myStudents.php?student='.$user_id.'">'.Display::return_icon('statistics.gif', get_lang('Reporting')).'</a>&nbsp;&nbsp;';
	}

	if (api_is_platform_admin(true)) {
        $editProfileUrl = Display::getProfileEditionLink($user_id, true);

        if (!$user_is_anonymous && api_global_admin_can_edit_admin($user_id, null, true)) {
            $result .= '<a href="' . $editProfileUrl . '">'.Display::return_icon('edit.png', get_lang('Edit'), array(), ICON_SIZE_SMALL).'</a>&nbsp;';
		} else {
            $result .= Display::return_icon('edit_na.png', get_lang('Edit'), array(), ICON_SIZE_SMALL).'</a>&nbsp;';
		}
	}

	if ($is_admin) {
		$result .= Display::return_icon('admin_star.png', get_lang('IsAdministrator'),array('width'=> ICON_SIZE_SMALL, 'heigth'=> ICON_SIZE_SMALL));
	} else {
		$result .= Display::return_icon('admin_star_na.png', get_lang('IsNotAdministrator'));
	}

	// actions for assigning sessions, courses or users
	if (api_is_session_admin()) {
		/*if ($row[0] == api_get_user_id()) {
			$result .= '<a href="dashboard_add_sessions_to_user.php?user='.$user_id.'">'.Display::return_icon('view_more_stats.gif', get_lang('AssignSessions')).'</a>&nbsp;&nbsp;';
		}*/
	} else {
        if ($current_user_status_label == $statusname[SESSIONADMIN]) {
            $result .= Display::url(
                Display::return_icon('view_more_stats.gif', get_lang('AssignSessions')),
                "dashboard_add_sessions_to_user.php?user={$user_id}"
            );
        } else {
            if (
                $current_user_status_label == $statusname[DRH] ||
                UserManager::is_admin($user_id) ||
                $current_user_status_label == $statusname[STUDENT_BOSS]
            ) {
                $result .= Display::url(
                    Display::return_icon('user_subscribe_course.png', get_lang('AssignUsers'), '', ICON_SIZE_SMALL),
                    "dashboard_add_users_to_user.php?user={$user_id}"
                );
            }

            if ($current_user_status_label == $statusname[DRH] || UserManager::is_admin($user_id)) {
                $result .= Display::url(
                    Display::return_icon('course_add.gif', get_lang('AssignCourses')),
                    "dashboard_add_courses_to_user.php?user={$user_id}"
                );

                $result .= Display::url(
                    Display::return_icon('view_more_stats.gif', get_lang('AssignSessions')),
                    "dashboard_add_sessions_to_user.php?user={$user_id}"
                );
            }
        }
	}

    if (api_is_platform_admin()) {
        $result .= ' <a data-title="'.get_lang('FreeBusyCalendar').'" href="'.api_get_path(WEB_AJAX_PATH).'agenda.ajax.php?a=get_user_agenda&user_id='.$user_id.'&modal_size=lg" class="agenda_opener ajax">'.
            Display::return_icon('calendar.png', get_lang('FreeBusyCalendar'), array(), ICON_SIZE_SMALL).'</a>';
        $deleteAllowed = !api_get_configuration_value('deny_delete_users');
        if ($deleteAllowed) {
            if ($user_id != api_get_user_id() &&
                !$user_is_anonymous &&
                api_global_admin_can_edit_admin($user_id)
            ) {
                // you cannot lock yourself out otherwise you could disable all the accounts including your own => everybody is locked out and nobody can change it anymore.
                $result .= ' <a href="user_list.php?action=delete_user&user_id='.$user_id.'&'.$url_params.'&sec_token='.$_SESSION['sec_token'].'"  onclick="javascript:if(!confirm('."'".addslashes(api_htmlentities(get_lang("ConfirmYourChoice"),ENT_QUOTES,$charset))."'".')) return false;">'.Display::return_icon('delete.png', get_lang('Delete'), array(), ICON_SIZE_SMALL).'</a>';
            } else {
                $result .= Display::return_icon('delete_na.png', get_lang('Delete'), array(), ICON_SIZE_SMALL);
            }
        }
    }
	return $result;
}


/**
 * Build the active-column of the table to lock or unlock a certain user
 * lock = the user can no longer use this account
 * @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
 * @param int $active the current state of the account
 * @param string $params
 * @param array $row
 * @return string Some HTML-code with the lock/unlock button
 */
function active_filter($active, $params, $row)
{
    $_user = api_get_user_info();

    if ($active == '1') {
        $action = 'Lock';
        $image = 'accept';
    } elseif ($active == '-1') {
        $action = 'edit';
        $image = 'warning';
    } elseif ($active == '0') {
        $action = 'Unlock';
        $image = 'error';
    }

    $result = '';

    if ($action == 'edit') {
        $result = Display::return_icon($image.'.png', get_lang('AccountExpired'), array(), 16);
    } elseif ($row['0']<>$_user['user_id']) {
    	// you cannot lock yourself out otherwise you could disable all the accounts including your own => everybody is locked out and nobody can change it anymore.
		$result = Display::return_icon($image.'.png', get_lang(ucfirst($action)), array('onclick'=>'active_user(this);', 'id'=>'img_'.$row['0']), 16).'</a>';
	}
	return $result;
}

/**
 * Instead of displaying the integer of the status, we give a translation for the status
 *
 * @param integer $status
 * @return string translation
 *
 * @version march 2008
 * @author Patrick Cool <patrick.cool@UGent.be>, Ghent University, Belgium
 */
function status_filter($status) {
	$statusname = api_get_status_langvars();
	return $statusname[$status];
}

if (isset($_GET['keyword']) || isset($_GET['keyword_firstname'])) {
    $interbreadcrumb[] = array ("url" => 'index.php', "name" => get_lang('PlatformAdmin'));
    $interbreadcrumb[] = array ("url" => 'user_list.php', "name" => get_lang('UserList'));
    $tool_name = get_lang('SearchUsers');
} else {
    $interbreadcrumb[] = array ("url" => 'index.php', "name" => get_lang('PlatformAdmin'));
    $tool_name = get_lang('UserList');
}

$message = '';

if (!empty($action)) {
    $check = Security::check_token('get');
	if ($check) {
		switch ($action) {
            case 'add_user_to_my_url':
                $user_id = $_REQUEST["user_id"];
                $result = UrlManager::add_user_to_url($user_id, $current_access_url_id);
                if ($result ) {
                    $user_info = api_get_user_info($user_id);
                    $message = get_lang('UserAdded').' '.$user_info['firstname'].' '.$user_info['lastname'].' ('.$user_info['username'].')';
                    $message  = Display::return_message($message, 'confirmation');
                }
                break;
			case 'delete_user':
				if (api_is_platform_admin()) {
                    $user_to_delete = $_GET['user_id'];
                    $current_user_id = api_get_user_id();

					if ($deleteUserAvailable && api_global_admin_can_edit_admin($_GET['user_id'])) {
						if ($user_to_delete != $current_user_id && UserManager :: delete_user($_GET['user_id'])) {
							$message = Display :: return_message(get_lang('UserDeleted'), 'confirmation');
						} else {
							$message = Display :: return_message(get_lang('CannotDeleteUserBecauseOwnsCourse'), 'error');
						}
					} else {
						$message = Display :: return_message(get_lang('CannotDeleteUser'),'error');
					}
				}
				break;
            case 'delete':
				if (api_is_platform_admin()) {
					$number_of_selected_users = count($_POST['id']);
					$number_of_deleted_users = 0;
					if (is_array($_POST['id'])) {
						foreach ($_POST['id'] as $index => $user_id) {
							if ($user_id != $_user['user_id']) {
								if (UserManager::delete_user($user_id)) {
									$number_of_deleted_users++;
								}
							}
						}
					}
					if ($number_of_selected_users == $number_of_deleted_users) {
                        $message = Display :: return_message(get_lang('SelectedUsersDeleted'), 'confirmation');
					} else {
                        $message = Display :: return_message(get_lang('SomeUsersNotDeleted'), 'error');
					}
				}
				break;
		}
		Security::clear_token();
	}
}

// Create a search-box
$form = new FormValidator('search_simple', 'get', '', '', array(), FormValidator::LAYOUT_INLINE);
$form->addElement('text', 'keyword');
$form->addButtonSearch(get_lang('Search'));
$form->addElement(
    'static',
    'search_advanced_link',
    null,
    '<a href="javascript://" class = "advanced_parameters" onclick="display_advanced_search_form();">
        <span id="img_plus_and_minus">&nbsp;'.
        Display::return_icon('div_show.gif', get_lang('Show'), array('style'=>'vertical-align:middle')).' '.get_lang('AdvancedSearch').'
        </span>
    </a>'
);

$actions  = '';
if (api_is_platform_admin()) {
	$actions .= '<div style="float:right;">'.
		 '<a href="'.api_get_path(WEB_CODE_PATH).'admin/user_add.php">'.
         Display::return_icon('new_user.png',get_lang('AddUsers'),'',ICON_SIZE_MEDIUM).'</a>'.
		 '</div>';
}
$actions .= $form->return_form();

if (isset ($_GET['keyword'])) {
	$parameters = array ('keyword' => Security::remove_XSS($_GET['keyword']));
} elseif (isset ($_GET['keyword_firstname'])) {
	$parameters['keyword_firstname'] 	= Security::remove_XSS($_GET['keyword_firstname']);
	$parameters['keyword_lastname']	 	= Security::remove_XSS($_GET['keyword_lastname']);
	$parameters['keyword_username']	 	= Security::remove_XSS($_GET['keyword_username']);
	$parameters['keyword_email'] 	 	= Security::remove_XSS($_GET['keyword_email']);
	$parameters['keyword_officialcode'] = Security::remove_XSS($_GET['keyword_officialcode']);
	$parameters['keyword_status'] 		= Security::remove_XSS($_GET['keyword_status']);
	$parameters['keyword_active'] 		= Security::remove_XSS($_GET['keyword_active']);
	$parameters['keyword_inactive'] 	= Security::remove_XSS($_GET['keyword_inactive']);
}
// Create a sortable table with user-data
$parameters['sec_token'] = Security::get_token();

// get the list of all admins to mark them in the users list
$admin_table = Database::get_main_table(TABLE_MAIN_ADMIN);
$sql_admin = "SELECT user_id FROM $admin_table";
$res_admin = Database::query($sql_admin);
$_admins_list = array();
while ($row_admin = Database::fetch_row($res_admin)) {
	$_admins_list[] = $row_admin[0];
}

// Display Advanced search form.
$form = new FormValidator('advanced_search', 'get', '', '', array(), FormValidator::LAYOUT_HORIZONTAL);

$form->addElement('html','<div id="advanced_search_form" style="display:none;">');
$form->addElement('header', get_lang('AdvancedSearch'));
$form->addText('keyword_firstname',get_lang('FirstName'),false);
$form->addText('keyword_lastname',get_lang('LastName'),false);

$form->addText('keyword_username',get_lang('LoginName'),false);
$form->addText('keyword_email',get_lang('Email'),false);

$form->addText('keyword_officialcode',get_lang('OfficialCode'),false);

$status_options = array();
$status_options['%'] = get_lang('All');
$status_options[STUDENT] = get_lang('Student');
$status_options[COURSEMANAGER] = get_lang('Teacher');
$status_options[DRH] = get_lang('Drh');
$status_options[SESSIONADMIN] = get_lang('SessionsAdmin');
$status_options[PLATFORM_ADMIN] = get_lang('Administrator');

$form->addElement('select','keyword_status',get_lang('Profile'), $status_options    );

$active_group = array();
$active_group[] = $form->createElement('checkbox','keyword_active','', get_lang('Active'));
$active_group[] = $form->createElement('checkbox','keyword_inactive','', get_lang('Inactive'));
$form->addGroup($active_group,'',get_lang('ActiveAccount'), '<br/>',false);

$form->addElement('checkbox', 'check_easy_passwords', null, get_lang('CheckEasyPasswords'));

$form->addButtonSearch(get_lang('SearchUsers'));


$defaults = array();
$defaults['keyword_active'] = 1;
$defaults['keyword_inactive'] = 1;
$form->setDefaults($defaults);
$form->addElement('html','</div>');

$form = $form->returnForm();

$table = new SortableTable(
    'users',
    'get_number_of_users',
    'get_user_data',
    (api_is_western_name_order() xor api_sort_by_first_name()) ? 3 : 2
);
$table->set_additional_parameters($parameters);
$table->set_header(0, '', false, 'width="18px"');
$table->set_header(1, get_lang('Photo'), false);
$table->set_header(2, get_lang('OfficialCode'));

if (api_is_western_name_order()) {
	$table->set_header(3, get_lang('FirstName'));
	$table->set_header(4, get_lang('LastName'));
} else {
	$table->set_header(3, get_lang('LastName'));
	$table->set_header(4, get_lang('FirstName'));
}
$table->set_header(5, get_lang('LoginName'));
$table->set_header(6, get_lang('Email'));
$table->set_header(7, get_lang('Profile'));
$table->set_header(8, get_lang('Active'), true, 'width="15px"');
$table->set_header(9, get_lang('RegistrationDate'), true, 'width="90px"');
$table->set_header(10, get_lang('Action'), false, 'width="220px"');

$table->set_column_filter(3, 'user_filter');
$table->set_column_filter(4, 'user_filter');
$table->set_column_filter(6, 'email_filter');
$table->set_column_filter(7, 'status_filter');
$table->set_column_filter(8, 'active_filter');
$table->set_column_filter(10, 'modify_filter');

// Only show empty actions bar if delete users has been blocked
if (api_is_platform_admin() && !(api_get_configuration_value('deny_delete_users'))) {
    $table->set_form_actions(array('delete' => get_lang('DeleteFromPlatform')));
} else {
    $table->set_form_actions(array('none' => get_lang('NoActionAvailable')));
}

$table_result = $table->return_table();
$extra_search_options = '';

//Try to search the user everywhere
if ($table->get_total_number_of_items() == 0) {

    if (api_get_multiple_access_url() && isset($_REQUEST['keyword'])) {
        $keyword = Database::escape_string($_REQUEST['keyword']);
        $conditions = array('username' => $keyword);
        $user_list = UserManager::get_user_list($conditions, array(), false, ' OR ');
        if (!empty($user_list)) {

            $extra_search_options = Display::page_subheader(get_lang('UsersFoundInOtherPortals'));

            $table = new HTML_Table(array('class' => 'data_table'));
            $column = 0;
            $row = 0;
            $headers = array(get_lang('User'), 'URL', get_lang('Actions'));
            foreach ($headers as $header) {
                $table->setHeaderContents($row, $column, $header);
                $column++;
            }
            $row++;

            foreach ($user_list as $user) {
                $column = 0;
                $access_info = UrlManager::get_access_url_from_user($user['id']);
                $access_info_to_string = '';
                $add_user = true;
                if (!empty($access_info)) {
                    foreach ($access_info as $url_info) {
                        if ($current_access_url_id == $url_info['access_url_id']) {
                            $add_user = false;
                        }
                        $access_info_to_string .= $url_info['url'].'<br />';
                    }
                }
                if ($add_user) {
                    $row_table = array();
                    $row_table[] =  api_get_person_name($user['firstname'], $user['lastname']).' ('.$user['username'].') ';
                    $row_table[] =  $access_info_to_string;
                    $url = api_get_self().'?action=add_user_to_my_url&user_id='.$user['id'].'&sec_token='.$_SESSION['sec_token'];
                    $row_table[] =  Display::url(get_lang('AddUserToMyURL'), $url, array('class' => 'btn'));

                    foreach ($row_table as $cell) {
                        $table->setCellContents($row, $column, $cell);
                        $table->updateCellAttributes($row, $column, 'align="center"');
                        $column++;
                    }
                    $table->updateRowAttributes($row, $row % 2 ? 'class="row_even"' : 'class="row_odd"', true);
                    $row++;
                }
            }
            $extra_search_options .= $table->toHtml();
            $table_result = '';
        }
    }
}

$tpl = new Template($tool_name);
$tpl->assign('actions', $actions);
$tpl->assign('message', $message);
$tpl->assign('content', $form.$table_result.$extra_search_options);
$tpl->display_one_col_template();