<?php //$id: $
/**
 * This script provides the caller service with a list
 * of courses that have a certain level of visibility
 * on this dokeos portal.
 * It is set to work with the Dokeos module for Drupal:
 * http://drupal.org/project/dokeos
 *
 * See license terms in /dokeos_license.txt
 * @author Yannick Warnier <yannick.warnier@dokeos.com>
 */
require_once '../inc/global.inc.php';
$libpath = api_get_path(LIBRARY_PATH);
require_once $libpath.'nusoap/nusoap.php';

// Create the server instance
$server = new soap_server();
// Initialize WSDL support
$server->configureWSDL('WSCourseList', 'urn:WSCourseList');

/* Register DokeosWSCourseList function */
// Register the data structures used by the service

$server->wsdl->addComplexType(
        'courseDetails',
        'complexType',
        'struct',
        'all',
        '',
        array(
          'name'=>'code'  , 'type'=>'xsd:string',
          'name'=>'title'  , 'type'=>'xsd:string',
          'name'=>'url'    , 'type'=>'xsd:string',
          'name'=>'teacher', 'type'=>'xsd:string',
          'name'=>'language','type'=>'xsd:string',
        )
);

$server->wsdl->addComplexType(
    'courseList',
    'complexType',
    'array',
    '',
    'SOAP-ENC:Array',
    array(),
    array(
        array('ref'=>'SOAP:ENC:arrayType',
        'wsdl:arrayType'=>'tns:courseDetails[]')
    ),
    'tns:courseDetails'
);

// Register the method to expose
$server->register('DokeosWSCourseList',         // method name
    array('username' => 'xsd:string',
          'signature' => 'xsd:string',
          'visibilities' => 'xsd:string'),      // input parameters
    array('return' => 'xsd:Array'),             // output parameters
    'urn:WSCourseList',                         // namespace
    'urn:WSCourseList#DokeosWSCourseList',      // soapaction
    'rpc',                                      // style
    'encoded',                                  // use
    'This service returns a list of courses'    // documentation
);


/**
 * Get a list of courses (code, url, title, teacher, language) and return to caller
 * Function registered as service. Returns strings in UTF-8.
 * @param string User name in Dokeos
 * @param string Signature (composed of the sha1(username+apikey)
 * @param mixed  Array or string. Type of visibility of course (public, public-registered, private, closed)
 * @return array Courses list (code=>[title=>'title',url='http://...',teacher=>'...',language=>''],code=>[...],...)
 */
function DokeosWSCourseList($username, $signature, $visibilities = 'public') {
    if (empty($username) or empty($signature)) { return -1; }

    require_once api_get_path(LIBRARY_PATH).'course.lib.php';
    require_once api_get_path(LIBRARY_PATH).'usermanager.lib.php';
    global $_configuration;

    $info = api_get_user_info_from_username($username);
    $user_id = $info['user_id'];
    if (!UserManager::is_admin($user_id)) { return -1; }

    $list = UserManager::get_api_keys($user_id, 'dokeos');
    $key = '';
    foreach ($list as $key) {
        break;
    }

    $local_key = $username.$key;

    if (!api_is_valid_secret_key($signature, $local_key)) {
        return -1; // The secret key is incorrect.
    }

   	// Libraries
	require_once (api_get_path(LIBRARY_PATH).'course.lib.php');

	$vis = array('public' => '3', 'public-registered' => '2', 'private' => '1', 'closed' => '0');

	$courses_list = array();

	if (!is_array($visibilities)) {
		$visibilities = split(',', $visibilities);
	}
	foreach ($visibilities as $visibility) {
		if (!in_array($visibility, array_keys($vis))) {
   			return array('error_msg' => 'Security check failed');
		}
		$courses_list_tmp = CourseManager::get_courses_list(null, null, null, null, $vis[$visibility]);
		foreach ($courses_list_tmp as $index => $course) {
			$course_info = CourseManager::get_course_information($course['code']);
			$courses_list[] = array('code' => $course['code'], 'title' => api_utf8_encode($course_info['title']), 'url' => api_get_path(WEB_COURSE_PATH).$course_info['directory'].'/', 'teacher' => api_utf8_encode($course_info['tutor_name']), 'language' => $course_info['course_language']);
		}
	}
	return $courses_list;
}

// Use the request to (try to) invoke the service.
$HTTP_RAW_POST_DATA = isset($HTTP_RAW_POST_DATA) ? $HTTP_RAW_POST_DATA : '';
$server->service($HTTP_RAW_POST_DATA);