<?php

if ( $request->depth > 0 ) {
  $request->DoResponse( 400, 'The principal-property-search REPORT is only defined for Depth "0".' );
}

/**
 * Build the array of properties to include in the report output
 */
$searches = $xmltree->GetPath('/DAV::principal-property-search/DAV::property-search');
dbg_log_array( "principal", "SEARCH", $searches, true );

$clause_joiner = " AND ";
$CS_search_test = $xmltree->GetAttribute('test');
if ( isset($CS_search_test) && $CS_search_test == 'anyof' ) {
  $clause_joiner = " OR ";
}

# Calendar on macOS searches for the principal type as an attribute.
$principal_type = $xmltree->GetAttribute('type');

$params = array();
$typewhere = "";
$where = "";
$join = "";

dbg_error_log("SEARCH", "type: '%s'", $principal_type );

// This is ugly, but macOS specifies the calendar type as an attribute
if (isset($principal_type)) {
    $typewhere = 'principal_type.label = :principal_type';
    $params[':principal_type'] = $principal_type;

    $join = 'LEFT JOIN principal_type ON (type_id = principal_type_id)';
}

foreach( $searches AS $k => $search ) {
  $qry_props = $search->GetPath('/DAV::property-search/DAV::prop/*');  // There may be many
  $match     = $search->GetPath('/DAV::property-search/DAV::match');   // There may only be one
  if ( empty($match) or !is_object($match[0]) ) {
    dbg_error_log("ERROR", "Unable to extract a match clause from '%s'", $search->RenderContent() );
    continue;
  }
  dbg_log_array( "principal", "MATCH", $match, true );
  $match = $match[0]->GetContent();
  $subwhere = "";
  foreach( $qry_props AS $k1 => $v1 ) {
    if ( $subwhere != "" ) $subwhere .= " OR ";
    switch( $v1->GetNSTag() ) {
      case 'DAV::displayname':
        $subwhere .= ' displayname ILIKE :displayname_match ';
        $params[':displayname_match'] = '%'.$match.'%';
        break;

      case 'urn:ietf:params:xml:ns:caldav:calendar-user-address-set':
        $match = preg_replace('{^.*/caldav.php/([^/]+)(/.*)?$}', '\\1', $match);
        $match = preg_replace('{^mailto:}', '', $match);
        $subwhere .= ' (email ILIKE :user_address_match OR username ILIKE :user_address_match) ';
        $params[':user_address_match'] = '%'.$match.'%';
        break;

      case 'urn:ietf:params:xml:ns:caldav:calendar-home-set':
        $match = preg_replace('{^.*/caldav.php}', '', $match);
        $subwhere .= ' dav_name LIKE :calendar_home_match ';
        $params[':calendar_home_match'] = $match.'%';
        break;

      default:
        /**
        * @todo We should handle a lot more properties here.  principal-URL seems a likely one to be used.
        * @todo We should catch the unsupported properties in the query and fire back an error indicating so.
        */
        dbg_error_log("principal", "Unhandled tag '%s' to match '%s'\n", $v1->GetNSTag(), $match );
    }
  }
  if ( $subwhere != "" ) {
    $where .= sprintf( "%s(%s)", ($where == "" ? "" : $clause_joiner), $subwhere );
  }
}

if ( $where != "" && $typewhere != "" ) {
    $where = "WHERE $typewhere AND $where";
} elseif ( $where != "" ) {
    $where = "WHERE $where";
} elseif ( $typewhere != "" ) {
    $where = "WHERE $typewhere";
}

$sql = "SELECT * FROM dav_principal $join $where ORDER BY principal_id LIMIT 100";
$qry = new AwlQuery($sql, $params);


$get_props = $xmltree->GetPath('/DAV::principal-property-search/DAV::prop/*');
$properties = array();
foreach( $get_props AS $k1 => $v1 ) {
  $properties[] = $v1->GetNSTag();
}

$responses = array();
if ( $qry->Exec("REPORT",__LINE__,__FILE__) && $qry->rows() > 0 ) {
  while( $row = $qry->Fetch() ) {
    $principal = new DAVResource($row);
    $responses[] = $principal->RenderAsXML( $properties, $reply );
  }
}

$multistatus = new XMLElement( "multistatus", $responses, $reply->GetXmlNsArray() );

$request->XMLResponse( 207, $multistatus );