<?php

////////////////////////////////////////////////////////////////////////////////////
// This is the Events API. At this time it simply appends to the Events JSON
// You need to supply at a minimum following GET variables 
//    start_time => this is freeform as we'll see the PHP strtotime function to 
//       convert to unix time stamp. You can also specify now 
//    description => Event description
//    host_regex => Host regular expression ie. web or web-0[2,4,5]
////////////////////////////////////////////////////////////////////////////////////
// Make timestamp, description and host_regex have been supplied before proceeding
header("Content-Type: text/plain");

$conf['gweb_root'] = dirname(dirname(__FILE__));

include_once $conf['gweb_root'] . "/eval_conf.php";
include_once $conf['gweb_root'] . "/functions.php";
include_once $conf['gweb_root'] . "/lib/common_api.php";

if ( ! $conf['overlay_events'] ) {
  api_return_error( "Events API is DISABLED. Please set \$conf['overlay_events'] = true to enable." );
}

if ( $conf['auth_system'] == 'readonly' ) {
  api_return_error( "Events are readonly. Please set \$conf['auth_system'] to something other than readonly." );
}

# If events_auth_token is specified in conf.php use that.
if ( isset($conf['events_auth_token']) ) {
   if ( ! ( isset($_REQUEST['token']) && 
	    $conf['events_auth_token'] == $_REQUEST['token'] ) ) {
      api_return_error( "Error: Events Auth Token is invalid. Please check token" );
   }
}

if ( !isset($_REQUEST['action']) ) {
  api_return_error( "Error: You need to specify an action at a minimum" );
}

switch ( $_REQUEST['action'] ) {
 
  case "add":
    if ( ! isset($_REQUEST['start_time']) || 
	 ! isset($_REQUEST['summary']) || 
	 ! isset($_REQUEST['host_regex']) ) {
      api_return_error( "Error: You need to supply start_time, summary, host_regex at a minimum" );
    }

    // If the time is now just insert the current time stamp. Otherwise use strtotime
    // to convert
    if ( $_REQUEST['start_time'] == "now" )
      $start_time = time();
    else if ( is_numeric($_REQUEST['start_time']) ) 
      $start_time = $_REQUEST['start_time'];
    else 
      $start_time = strtotime($_REQUEST['start_time']);

    $grid = isset($_REQUEST['grid']) ? sanitize($_REQUEST['grid']) : "*";
    $cluster = isset($_REQUEST['cluster']) ? sanitize($_REQUEST['cluster']) : "*";
    $description = isset($_REQUEST['description']) ? sanitize($_REQUEST['description']) : "";
    // Generate a unique event ID. This is so we can reference it later
    $event_id = uniqid();

    $event = array( "event_id" => $event_id, 
		    "start_time" => $start_time, 
		    "summary" => sanitize($_REQUEST['summary']),
		    "grid" => $grid, 
		    "cluster" => $cluster, 
		    "host_regex" => $_REQUEST['host_regex'],
		    "description" => $description
		    );

    if ( isset($_REQUEST['end_time']) ) {
        if ( $_REQUEST['end_time'] == "now" )
            $end_time = time();
        else if ( is_numeric($_REQUEST['end_time']) )
            $end_time = $_REQUEST['end_time'];
        else
            $end_time = strtotime($_REQUEST['end_time']);
        $event['end_time'] = $end_time;
    }

    $message = ganglia_events_add( $event );
    break;

  case "edit":
    $message = ganglia_event_modify( $_REQUEST );
    break;

  case "remove":
  case "delete":

    if ( !isset( $_REQUEST['event_id'] ) ) {
      api_return_error( "No event_id has been supplied." );
    }
    $message = ganglia_event_delete( $_REQUEST['event_id'] );

    break;

  case "list":

    $message = ganglia_events_get();
    break;

  default:

    api_return_error( "No valid action specified" );
    break;

} // end of switch ( $_REQUEST['action'] ) {

print json_encode($message);

?>