htdocs/always.php

   1 <?php
   2 /**
   3 * @package davical
   4 * @author Andrew McMillan <andrew@mcmillan.net.nz>
   5 * @copyright Catalyst .Net Ltd, Morphoss Ltd <http://www.morphoss.com/>
   6 * @license   http://gnu.org/copyleft/gpl.html GNU GPL v2 or later
   7 */
   8
   9 if ( preg_match('{/always.php$}', $_SERVER['SCRIPT_NAME'] ) ) header('Location: index.php');
  10
  11 // Ensure the configuration starts out as an empty object.
  12 $c = (object) array();
  13 $c->script_start_time = microtime(true);
  14
  15 // Ditto for a few other global things
  16 unset($session); unset($request); unset($dbconn); unset($_awl_dbconn); unset($include_properties);
  17
  18 // An ultra-simple exception handler to catch errors that occur
  19 // before we get a more functional exception handler in place...
  20 function early_exception_handler($e) {
  21   if ( !headers_sent() ) header("Content-type: text/plain"); else echo "<pre>\n";
  22   while ( ob_get_level() > 0 ) ob_end_flush();
  23   echo "Exception [".$e->getCode()."] ".$e->getmessage()."\n";
  24   echo "At line ", $e->getLine(), " of ", $e->getFile(), "\n";
  25   echo "================= Stack Trace ===================\n";
  26
  27   $trace = array_reverse($e->getTrace());
  28   foreach( $trace AS $k => $v ) {
  29     printf( "%s[%d] %s%s%s()\n", $v['file'], $v['line'], (isset($v['class'])?$v['class']:''), (isset($v['type'])?$v['type']:''), (isset($v['function'])?$v['function']:'') );
  30   }
  31 }
  32 set_exception_handler('early_exception_handler');
  33
  34 $c->default_timezone = ini_get('date.timezone');
  35 if ( empty($c->default_timezone) ) {
  36   $c->default_timezone = 'UTC';
  37   date_default_timezone_set('UTC');
  38 }
  39
  40 // Default some of the configurable values
  41 $c->sysabbr     = 'davical';
  42 $c->admin_email = 'admin@davical.example.com';
  43 $c->system_name = 'DAViCal CalDAV Server';
  44 $c->domain_name = (isset($_SERVER['SERVER_NAME'])?$_SERVER['SERVER_NAME']:$_SERVER['SERVER_ADDR']);
  45 $c->save_time_zone_defs = true;
  46 $c->collections_always_exist = false;
  47 $c->allow_get_email_visibility = false;
  48 $c->permission_scan_depth = 2;
  49 $c->expand_pdo_parameters = true;
  50 $c->home_calendar_name    = 'calendar';
  51 $c->home_addressbook_name = 'addresses';
  52 $c->enable_row_linking = true;
  53 $c->enable_scheduling = false;
  54 $c->http_auth_mode = 'Basic';
  55 // $c->default_locale = array('es_MX', 'es_AR', 'es', 'pt');  // An array of locales to try, or just a single locale
  56 // $c->local_tzid = 'Pacific/Auckland';  // Perhaps we should read from /etc/timezone - I wonder how standard that is?
  57 $c->default_locale = 'en';
  58 $c->locale_path = '../locale';
  59 $c->base_url = preg_replace('#/[^/]+\.php.*$#', '', $_SERVER['SCRIPT_NAME']);
  60 $c->base_directory = preg_replace('#/[^/]*$#', '', $_SERVER['DOCUMENT_ROOT']);
  61 $c->default_privileges = array('read-free-busy', 'schedule-deliver');
  62
  63 $c->enable_auto_schedule = true;
  64
  65 $c->schema_major = $c->schema_minor = $c->schema_patch = 0;
  66
  67 $c->stylesheets = array( $c->base_url.'/davical.css' );
  68 $c->images      = $c->base_url . '/images';
  69
  70 // Add a default for newly created users
  71 $c->template_usr = array( 'active' => true,
  72                           'locale' => 'en_GB',
  73                           'date_format_type' => 'E',
  74                           'email_ok' => date('Y-m-d')
  75                         );
  76
  77 $c->hide_TODO = true;                      // VTODO only visible to collection owner
  78 $c->readonly_webdav_collections = true;    // WebDAV access is readonly
  79
  80 // Kind of private configuration values
  81 $c->total_query_time = 0;
  82
  83 $c->dbg = array();
  84
  85
  86 // Utilities
  87 if ( ! @include_once('AWLUtilities.php') ) {
  88   $try_paths = array(
  89         '../../awl/inc'
  90       , '/usr/share/awl/inc'        // Where it ends up on Debian
  91       , '/usr/share/php/awl/inc'    // Fedora's standard for PHP libraries
  92       , '/usr/local/share/awl/inc'
  93   );
  94   foreach( $try_paths AS $awl_include_path ) {
  95     if ( @file_exists($awl_include_path.'/AWLUtilities.php') ) {
  96       set_include_path( $awl_include_path. PATH_SEPARATOR. get_include_path());
  97       break;
  98     }
  99   }
 100   if ( ! @include_once('AWLUtilities.php') ) {
 101     echo "Could not find the AWL libraries. Are they installed? Check your include_path in php.ini!\n";
 102     @ob_flush(); exit(0);
 103   }
 104 }
 105
 106 // Ensure that ../inc is in our included paths as early as possible
 107 set_include_path( '../inc'. PATH_SEPARATOR. get_include_path());
 108
 109
 110 /** We actually discovered this and worked around it earlier, but we can't log it until the utilties are loaded */
 111 if ( !isset($_SERVER['SERVER_NAME']) ) {
 112   @dbg_error_log( 'WARN', "Your webserver is not setting the SERVER_NAME parameter. You may need to set \$c->domain_name in your configuration.  Using IP address meanhwhile..." );
 113 }
 114
 115 /**
 116 * Calculate the simplest form of reference to this page, excluding the PATH_INFO following the script name.
 117 */
 118 $c->protocol_server_port = sprintf( '%s://%s%s',
 119                  (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on'? 'https' : 'http'),
 120                  $_SERVER['SERVER_NAME'],
 121                  (
 122                     ( (!isset($_SERVER['HTTPS']) || $_SERVER['HTTPS'] != 'on')
 123                                         && (!isset($_SERVER['SERVER_PORT']) || $_SERVER['SERVER_PORT'] == 80) )
 124                            || (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on'
 125                                                         && (!isset($_SERVER['SERVER_PORT']) || $_SERVER['SERVER_PORT'] == 443) )
 126                    ? ''
 127                    : ':'.$_SERVER['SERVER_PORT']
 128                  ) );
 129 $c->protocol_server_port_script = $c->protocol_server_port . ($_SERVER['SCRIPT_NAME'] == '/index.php' ? '' : $_SERVER['SCRIPT_NAME']);
 130
 131
 132 /**
 133 * We use @file_exists because things like open_basedir might noisily deny
 134 * access which could break DAViCal completely by causing output to start
 135 * too early.
 136 */
 137 ob_start( );
 138 if ( @file_exists('/etc/davical/'.$_SERVER['SERVER_NAME'].'-conf.php') ) {
 139   include('/etc/davical/'.$_SERVER['SERVER_NAME'].'-conf.php');
 140 }
 141 else if ( @file_exists('/etc/davical/config.php') ) {
 142   include('/etc/davical/config.php');
 143 }
 144 else if ( @file_exists('/usr/local/etc/davical/'.$_SERVER['SERVER_NAME'].'-conf.php') ) {
 145   include('/usr/local/etc/davical/'.$_SERVER['SERVER_NAME'].'-conf.php');
 146 }
 147 else if ( @file_exists('/usr/local/etc/davical/config.php') ) {
 148   include('/usr/local/etc/davical/config.php');
 149 }
 150 else if ( @file_exists('../config/config.php') ) {
 151   include('../config/config.php');
 152 }
 153 else if ( @file_exists('config/config.php') ) {
 154   include('config/config.php');
 155 }
 156 else {
 157   include('davical_configuration_missing.php');
 158   @ob_flush();  exit(0);
 159 }
 160 $config_warnings = trim(ob_get_contents());
 161 ob_end_clean();
 162
 163 if ( !isset($c->page_title) ) $c->page_title = $c->system_name;
 164
 165 if ( isset($_SERVER['HTTP_X_DAVICAL_TESTCASE']) ) {
 166   @dbg_error_log( 'LOG', '==========> Test case =%s=', $_SERVER['HTTP_X_DAVICAL_TESTCASE'] );
 167 }
 168 else if ( isset($c->dbg['script_start']) && $c->dbg['script_start'] ) {
 169   // Only log this if more than a little debugging of some sort is turned on, somewhere
 170   @dbg_error_log( 'LOG', '==========> method =%s= =%s= =%s= =%s= =%s=',
 171          $_SERVER['REQUEST_METHOD'], $c->protocol_server_port_script, (isset($_SERVER['PATH_INFO']) ? $_SERVER['PATH_INFO'] : '$_SERVER[PATH_INFO] undefined'), $c->base_url, $c->base_directory );
 172 }
 173
 174 /**
 175 * Now that we have loaded the configuration file we can switch to a
 176 * default site locale.  This may be overridden by each user.
 177 */
 178 putenv("LANG=". $c->default_locale);
 179 if ( function_exists('awl_set_locale') ) {
 180   awl_set_locale($c->default_locale);
 181   init_gettext( 'davical', $c->locale_path );
 182 }
 183
 184 /**
 185 * Work out our version
 186 *
 187 */
 188 $c->code_version = 0;
 189 $c->want_awl_version = '0.51';
 190 $c->version_string = '1.0.2'; // The actual version # is replaced into that during the build /release process
 191 if ( isset($c->version_string) && preg_match( '/(\d+)\.(\d+)\.(\d+)(.*)/', $c->version_string, $matches) ) {
 192   $c->code_major = $matches[1];
 193   $c->code_minor = $matches[2];
 194   $c->code_patch = $matches[3];
 195   $c->code_version = (($c->code_major * 1000) + $c->code_minor).'.'.$c->code_patch;
 196   dbg_error_log('caldav', 'Version (%d.%d.%d) == %s', $c->code_major, $c->code_minor, $c->code_patch, $c->code_version);
 197   @header( sprintf('Server: %d.%d', $c->code_major, $c->code_minor) );
 198 }
 199
 200 /**
 201 * Force the domain name to what was in the configuration file
 202 */
 203 $_SERVER['SERVER_NAME'] = $c->domain_name;
 204
 205 require_once('AwlQuery.php');
 206
 207 $c->want_dbversion = array(1,2,11);
 208 $c->schema_version = 0;
 209 $qry = new AwlQuery( 'SELECT schema_major, schema_minor, schema_patch FROM awl_db_revision ORDER BY schema_id DESC LIMIT 1;' );
 210 if ( $qry->Exec('always',__LINE__,__FILE__) && $row = $qry->Fetch() ) {
 211   $c->schema_version = doubleval( sprintf( '%d%03d.%03d', $row->schema_major, $row->schema_minor, $row->schema_patch) );
 212   $c->wanted_version = doubleval( sprintf( '%d%03d.%03d', $c->want_dbversion[0], $c->want_dbversion[1], $c->want_dbversion[2]) );
 213   $c->schema_major = $row->schema_major;
 214   $c->schema_minor = $row->schema_minor;
 215   $c->schema_patch = $row->schema_patch;
 216   if ( $c->schema_version < $c->wanted_version ) {
 217     $c->messages[] = sprintf( 'Database schema needs upgrading. Current: %d.%d.%d, Desired: %d.%d.%d',
 218              $row->schema_major, $row->schema_minor, $row->schema_patch, $c->want_dbversion[0], $c->want_dbversion[1], $c->want_dbversion[2]);
 219   }
 220   if ( isset($_SERVER['HTTP_X_DAVICAL_TESTCASE']) ) $qry->QDo('SET TIMEZONE TO \'Pacific/Auckland\'');
 221 }
 222
 223 require_once('Principal.php');
 224
 225 /**
 226  * Return the HTTP status code description for a given code. Hopefully
 227  * this is an efficient way to code this.
 228  * @return string The text for a give HTTP status code, in english
 229  */
 230 function getStatusMessage($status) {
 231   switch( $status ) {
 232     case 100:  $ans = 'Continue';                             break;
 233     case 101:  $ans = 'Switching Protocols';                  break;
 234     case 200:  $ans = 'OK';                                   break;
 235     case 201:  $ans = 'Created';                              break;
 236     case 202:  $ans = 'Accepted';                             break;
 237     case 203:  $ans = 'Non-Authoritative Information';        break;
 238     case 204:  $ans = 'No Content';                           break;
 239     case 205:  $ans = 'Reset Content';                        break;
 240     case 206:  $ans = 'Partial Content';                      break;
 241     case 207:  $ans = 'Multi-Status';                         break;
 242     case 300:  $ans = 'Multiple Choices';                     break;
 243     case 301:  $ans = 'Moved Permanently';                    break;
 244     case 302:  $ans = 'Found';                                break;
 245     case 303:  $ans = 'See Other';                            break;
 246     case 304:  $ans = 'Not Modified';                         break;
 247     case 305:  $ans = 'Use Proxy';                            break;
 248     case 307:  $ans = 'Temporary Redirect';                   break;
 249     case 400:  $ans = 'Bad Request';                          break;
 250     case 401:  $ans = 'Unauthorized';                         break;
 251     case 402:  $ans = 'Payment Required';                     break;
 252     case 403:  $ans = 'Forbidden';                            break;
 253     case 404:  $ans = 'Not Found';                            break;
 254     case 405:  $ans = 'Method Not Allowed';                   break;
 255     case 406:  $ans = 'Not Acceptable';                       break;
 256     case 407:  $ans = 'Proxy Authentication Required';        break;
 257     case 408:  $ans = 'Request Timeout';                      break;
 258     case 409:  $ans = 'Conflict';                             break;
 259     case 410:  $ans = 'Gone';                                 break;
 260     case 411:  $ans = 'Length Required';                      break;
 261     case 412:  $ans = 'Precondition Failed';                  break;
 262     case 413:  $ans = 'Request Entity Too Large';             break;
 263     case 414:  $ans = 'Request-URI Too Long';                 break;
 264     case 415:  $ans = 'Unsupported Media Type';               break;
 265     case 416:  $ans = 'Requested Range Not Satisfiable';      break;
 266     case 417:  $ans = 'Expectation Failed';                   break;
 267     case 422:  $ans = 'Unprocessable Entity';                 break;
 268     case 423:  $ans = 'Locked';                               break;
 269     case 424:  $ans = 'Failed Dependency';                    break;
 270     case 500:  $ans = 'Internal Server Error';                break;
 271     case 501:  $ans = 'Not Implemented';                      break;
 272     case 502:  $ans = 'Bad Gateway';                          break;
 273     case 503:  $ans = 'Service Unavailable';                  break;
 274     case 504:  $ans = 'Gateway Timeout';                      break;
 275     case 505:  $ans = 'HTTP Version Not Supported';           break;
 276     default:   $ans = 'Unknown HTTP Status Code '.$status;
 277   }
 278   return $ans;
 279 }
 280
 281
 282 /**
 283 * Construct a URL from the supplied dav_name.  The URL will be urlencoded,
 284 * except for any '/' characters in it.
 285 * @param string $partial_path  The part of the path after the script name
 286 */
 287 function ConstructURL( $partial_path, $force_script = false ) {
 288   global $c;
 289
 290   $partial_path = rawurlencode($partial_path);
 291   $partial_path = str_replace( '%2F', '/', $partial_path);
 292
 293   if ( ! isset($c->_url_script_path) ) {
 294     $c->protocol_server_port_script = str_replace( 'index.php', 'caldav.php', $c->protocol_server_port_script);
 295     $c->_url_script_path = (preg_match('#/$#', $c->protocol_server_port_script) ? 'caldav.php' : '');
 296     $c->_url_script_path = $c->protocol_server_port_script . $c->_url_script_path;
 297   }
 298
 299   $url = $c->_url_script_path;
 300   if ( $force_script ) {
 301     if ( ! preg_match( '#/caldav\.php$#', $url ) ) $url .= '/caldav.php';
 302   }
 303   $url .= $partial_path;
 304   $url = preg_replace( '#^(https?://.+)//#', '$1/', $url );  // Ensure we don't double any '/'
 305   $url = preg_replace('#^https?://[^/]+#', '', $url );       // Remove any protocol + hostname portion
 306
 307   return $url;
 308 }
 309
 310
 311 /**
 312 * Deconstruct a dav_name from the supplied URL.  The dav_name will be urldecoded.
 313 *
 314 * @param string $partial_path  The part of the path after the script name
 315 */
 316 function DeconstructURL( $url, $force_script = false ) {
 317   global $c;
 318
 319   $dav_name = rawurldecode($url);
 320
 321   /** Allow a path like .../username/calendar.ics to translate into the calendar URL */
 322   if ( preg_match( '#^(/[^/]+/[^/]+).ics$#', $dav_name, $matches ) ) {
 323     $dav_name = $matches[1]. '/';
 324   }
 325
 326   /** remove any leading protocol/server/port/prefix... */
 327   if ( !isset($c->deconstruction_base_path) ) $c->deconstruction_base_path = ConstructURL('/');
 328   if ( preg_match( '%^(.*?)'.str_replace('%', '\\%',$c->deconstruction_base_path).'(.*)$%', $dav_name, $matches ) ) {
 329     if ( $matches[1] == '' || $matches[1] == $c->protocol_server_port ) {
 330       $dav_name = $matches[2];
 331     }
 332   }
 333
 334   /** strip doubled slashes */
 335   if ( strstr($dav_name,'//') ) $dav_name = preg_replace( '#//+#', '/', $dav_name);
 336
 337   if ( substr($dav_name,0,1) != '/' ) $dav_name = '/'.$dav_name;
 338
 339   return $dav_name;
 340 }
 341
 342
 343 /**
 344 * Convert a date from ISO format into the sad old HTTP format.
 345 * @param string $isodate The date to convert
 346 */
 347 function ISODateToHTTPDate( $isodate ) {
 348   // It is necessary to use English for this, explicitly.  See Debian BTS Bug#661985 for more info.
 349   $month = gmstrftime('%m', strtotime($isodate));
 350   switch( intval($month) ) {
 351         case 1: $month = 'Jan'; break;
 352         case 2: $month = 'Feb'; break;
 353         case 3: $month = 'Mar'; break;
 354         case 4: $month = 'Apr'; break;
 355         case 5: $month = 'May'; break;
 356         case 6: $month = 'Jun'; break;
 357         case 7: $month = 'Jul'; break;
 358         case 8: $month = 'Aug'; break;
 359         case 9: $month = 'Sep'; break;
 360         case 10: $month = 'Oct'; break;
 361         case 11: $month = 'Nov'; break;
 362         case 12: $month = 'Dec'; break;
 363         default:
 364                 throw new Exception('Invalid month '.$month);
 365   }
 366   // Use strtotime since strptime is not available on Windows platform.
 367   return( gmstrftime('%a, %d '.$month.' %Y %H:%M:%S GMT', strtotime($isodate)) );
 368 }
 369
 370 /**
 371 * Convert a date into ISO format into the sparkly new ISO format.
 372 * @param string $indate The date to convert
 373 */
 374 function DateToISODate( $indate, $in_utc=false ) {
 375   // Use strtotime since strptime is not available on Windows platform.
 376   if ( $in_utc ) return( gmdate('Ymd\THis\Z', strtotime($indate)) );
 377   return( date('c', strtotime($indate)) );
 378 }
 379
 380 /**
 381 * Given a privilege string, or an array of privilege strings, return a bit mask
 382 * of the privileges.
 383 * @param mixed $raw_privs The string (or array of strings) of privilege names
 384 * @return integer A bit mask of the privileges.
 385 */
 386 define("DAVICAL_MAXPRIV", "65535");
 387 define("DAVICAL_ADDRESSBOOK_MAXPRIV", "1023");
 388 function privilege_to_bits( $raw_privs ) {
 389   $out_priv = 0;
 390
 391   if ( gettype($raw_privs) == 'string' ) $raw_privs = array( $raw_privs );
 392
 393   if ( ! is_array($raw_privs) ) $raw_privs = array($raw_privs);
 394
 395   foreach( $raw_privs AS $priv ) {
 396     $trim_priv = trim(strtolower(preg_replace( '/^.*:/', '', $priv)));
 397     switch( $trim_priv ) {
 398       case 'read'                            : $out_priv |=     1;  break;
 399       case 'write-properties'                : $out_priv |=     2;  break;
 400       case 'write-content'                   : $out_priv |=     4;  break;
 401       case 'unlock'                          : $out_priv |=     8;  break;
 402       case 'read-acl'                        : $out_priv |=    16;  break;
 403       case 'read-current-user-privilege-set' : $out_priv |=    32;  break;
 404       case 'bind'                            : $out_priv |=    64;  break;
 405       case 'unbind'                          : $out_priv |=   128;  break;
 406       case 'write-acl'                       : $out_priv |=   256;  break;
 407       case 'read-free-busy'                  : $out_priv |=   512;  break;
 408       case 'schedule-deliver-invite'         : $out_priv |=  1024;  break;
 409       case 'schedule-deliver-reply'          : $out_priv |=  2048;  break;
 410       case 'schedule-query-freebusy'         : $out_priv |=  4096;  break;
 411       case 'schedule-send-invite'            : $out_priv |=  8192;  break;
 412       case 'schedule-send-reply'             : $out_priv |= 16384;  break;
 413       case 'schedule-send-freebusy'          : $out_priv |= 32768;  break;
 414
 415       /** Aggregates of Privileges */
 416       case 'write'                           : $out_priv |=   198;  break; // 2 + 4 + 64 + 128
 417       case 'schedule-deliver'                : $out_priv |=  7168;  break; // 1024 + 2048 + 4096
 418       case 'schedule-send'                   : $out_priv |= 57344;  break; // 8192 + 16384 + 32768
 419       case 'all'                             : $out_priv  = DAVICAL_MAXPRIV;  break;
 420       case 'fake_privilege_for_input'        : break;
 421       default:
 422         dbg_error_log( 'ERROR', 'Cannot convert privilege of "%s" into bits.', $priv );
 423
 424     }
 425   }
 426
 427   // 'all' will include future privileges
 428   if ( ($out_priv & DAVICAL_MAXPRIV) >= DAVICAL_MAXPRIV ) $out_priv = pow(2,24) - 1;
 429   return $out_priv;
 430 }
 431
 432
 433 /**
 434 * Given a bit mask of the privileges, will return an array of the
 435 * text values of privileges.
 436 * @param integer $raw_bits A bit mask of the privileges.
 437 * @return mixed The string (or array of strings) of privilege names
 438 */
 439 function bits_to_privilege( $raw_bits, $resourcetype = 'resource' ) {
 440   $out_priv = array();
 441
 442   if ( is_string($raw_bits) ) {
 443     $raw_bits = bindec($raw_bits);
 444   }
 445
 446   if ( ($raw_bits & DAVICAL_MAXPRIV) == DAVICAL_MAXPRIV ) $out_priv[] = 'all';
 447
 448   if ( ($raw_bits &   1) != 0 ) $out_priv[] = 'DAV::read';
 449   if ( ($raw_bits &   8) != 0 ) $out_priv[] = 'DAV::unlock';
 450   if ( ($raw_bits &  16) != 0 ) $out_priv[] = 'DAV::read-acl';
 451   if ( ($raw_bits &  32) != 0 ) $out_priv[] = 'DAV::read-current-user-privilege-set';
 452   if ( ($raw_bits & 256) != 0 ) $out_priv[] = 'DAV::write-acl';
 453   if ( ($resourcetype == 'calendar' || $resourcetype == 'proxy' || $resourcetype == '*') && ($raw_bits & 512) != 0 ) $out_priv[] = 'urn:ietf:params:xml:ns:caldav:read-free-busy';
 454
 455   if ( ($raw_bits & 198) != 0 ) {
 456     if ( ($raw_bits & 198) == 198 ) $out_priv[] = 'DAV::write';
 457     if ( ($raw_bits &   2) != 0 ) $out_priv[] = 'DAV::write-properties';
 458     if ( ($raw_bits &   4) != 0 ) $out_priv[] = 'DAV::write-content';
 459     if ( ($raw_bits &  64) != 0 ) $out_priv[] = 'DAV::bind';
 460     if ( ($raw_bits & 128) != 0 ) $out_priv[] = 'DAV::unbind';
 461   }
 462
 463   if ( ($resourcetype == 'schedule-inbox' || $resourcetype == '*') && ($raw_bits & 7168) != 0 ) {
 464     if ( ($raw_bits & 7168) == 7168 ) $out_priv[] = 'urn:ietf:params:xml:ns:caldav:schedule-deliver';
 465     if ( ($raw_bits & 1024) != 0 ) $out_priv[] = 'urn:ietf:params:xml:ns:caldav:schedule-deliver-invite';
 466     if ( ($raw_bits & 2048) != 0 ) $out_priv[] = 'urn:ietf:params:xml:ns:caldav:schedule-deliver-reply';
 467     if ( ($raw_bits & 4096) != 0 ) $out_priv[] = 'urn:ietf:params:xml:ns:caldav:schedule-query-freebusy';
 468   }
 469
 470   if ( ($resourcetype == 'schedule-outbox' || $resourcetype == '*') && ($raw_bits & 57344) != 0 ) {
 471     if ( ($raw_bits & 57344) == 57344 ) $out_priv[] = 'urn:ietf:params:xml:ns:caldav:schedule-send';
 472     if ( ($raw_bits &  8192) != 0 ) $out_priv[] = 'urn:ietf:params:xml:ns:caldav:schedule-send-invite';
 473     if ( ($raw_bits & 16384) != 0 ) $out_priv[] = 'urn:ietf:params:xml:ns:caldav:schedule-send-reply';
 474     if ( ($raw_bits & 32768) != 0 ) $out_priv[] = 'urn:ietf:params:xml:ns:caldav:schedule-send-freebusy';
 475   }
 476
 477 //  dbg_error_log( 'DAVResource', ' Privilege bit "%s" is "%s".', $raw_bits, implode(', ', $out_priv) );
 478
 479   return $out_priv;
 480 }
 481
 482
 483 /**
 484 * Returns the array of privilege names converted into XMLElements
 485 */
 486 function privileges_to_XML( $privilege_names, &$xmldoc=null ) {
 487   if ( !isset($xmldoc) && isset($GLOBALS['reply']) ) $xmldoc = $GLOBALS['reply'];
 488   $privileges = array();
 489   foreach( $privilege_names AS $k ) {
 490     $privilege = new XMLElement('privilege');
 491     if ( isset($xmldoc) )
 492       $xmldoc->NSElement($privilege,$k);
 493     else
 494       $privilege->NewElement($k);
 495     $privileges[] = $privilege;
 496   }
 497   return $privileges;
 498 }
 499