<?php
/* For licensing terms, see /license.txt */
/**
 * This script provides the caller service with user details.
 * It is set to work with the Chamilo module for Drupal:
 * http://drupal.org/project/chamilo
 * 
 * @author Yannick Warnier <yannick.warnier@dokeos.com>
 * @package chamilo.webservices
 */
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('WSUserInfo', 'urn:WSUserInfo');

/* Register WSCourseList 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('WSCourseListOfUser',   // method name
    array('username' => 'xsd:string',
          'signature' => 'xsd:string'),         // input parameters
    array('return' => 'xsd:Array'),             // output parameters
    'urn:WSUserInfo',                           // namespace
    'urn:WSUserInfo#WSUserInfo',          // soapaction
    'rpc',                                      // style
    'encoded',                                  // use
    'This service returns a list of courses'    // documentation
);

/**
 * Get a list of courses (code, url, title, teacher, language) for a specific
 * user and return to caller
 * Function registered as service. Returns strings in UTF-8.
 * @param string User name in Chamilo 
 * @param string Signature (composed of the sha1(username+apikey)
 * @return array Courses list (code=>[title=>'title',url='http://...',teacher=>'...',language=>''],code=>[...],...)
 */
function WSCourseListOfUser($username, $signature) {
    if (empty($username) or empty($signature)) { return -1; }
    global $_configuration;

    $info = api_get_user_info_from_username($username);
    $user_id = $info['user_id'];
    $list = UserManager::get_api_keys($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.
    }

    $courses_list = array();
    $courses_list_tmp = CourseManager::get_courses_list_by_user_id($user_id);
    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;
}

/* Register WSEventsList function */
// Register the data structures used by the service
$server->wsdl->addComplexType(
    'eventDetails',
    'complexType',
    'struct',
    'all',
    '',
    array(
        'name'=>'datestart','type'=>'xsd:string',
        'name'=>'dateend','type'=>'xsd:string',
        'name'=>'title','type'=>'xsd:string',
        'name'=>'link','type'=>'xsd:string',
        'name'=>'coursetitle','type'=>'xsd:string',
    )
);

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

// Register the method to expose
$server->register('WSEventsList',       // method name
    array('username' => 'xsd:string',
          'signature' => 'xsd:string',
          'datestart' => 'xsd:int',
          'dateend'   => 'xsd:int'),          // input parameters
    array('return' => 'xsd:Array'),           // output parameters
    'urn:WSUserInfo',                         // namespace
    'urn:WSUserInfo#WSEventsList',      // soapaction
    'rpc',                                    // style
    'encoded',                                // use
    'This service returns a list of events of the courses the given user is subscribed to'      // documentation
);

/**
 * Get a list of events between two dates for the given username
 * Function registered as service. Returns strings in UTF-8.
 * @param string Username
 * @param string User's API key (the user's API key)
 * @param int    Start date, in YYYYMMDD format
 * @param int    End date, in YYYYMMDD format
 * @return array Events list
 */
function WSEventsList($username, $signature, $datestart = 0, $dateend = 0) {

    if (empty($username) or empty($signature)) { return -1; }
    global $_configuration;

    $info = api_get_user_info_from_username($username);
    $user_id = $info['user_id'];
    $list = UserManager::get_api_keys($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.
    }
    $events_list = array();

    $user_id = UserManager::get_user_id_from_username($username);
    if ($user_id === false) { return $events_list; } // Error in user id recovery.
    require_once '../calendar/myagenda.inc.php';
    $ds = substr($datestart,0,4).'-'.substr($datestart,4,2).'-'.substr($datestart,6,2).' 00:00:00';
    $de = substr($dateend,0,4).'-'.substr($dateend,4,2).'-'.substr($dateend,6,2).' 00:00:00';
    $events_list = get_personal_agenda_items_between_dates($user_id, $ds, $de);
    return $events_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);