<?php

$us3bin = exec( "ls -d ~us3/bin" );
include "$us3bin/listen-config.php";

$xml  = get_data();

if ( $xml != "" )
   parse( $xml );

$data = array();

local_status();

foreach ( $data as $item )
{
   update( $item[ 'cluster' ], $item[ 'queued' ], $item[ 'status' ], $item[ 'running' ] );
}

exit();

// Get the cluster status

function get_data()
{
   global $self;
   $url = "http://community.ucs.indiana.edu:19444/orps-service/XML/gateway/ultrascan";

   try
   {
      $post = new HttpRequest( $url, HttpRequest::METH_GET );
      $http = $post->send();
      $xml  = $post->getResponseBody();      
   }
   catch ( HttpException $e )
   {
//      write_log( "$self: Cluster Status not available" );
      return "";
   }

   return $xml;
}

// Parse the xml

function parse( $xml )
{
   global $data;
   
   $data = array();

   $x = new XML_Array( $xml );
   $d = $x->ReturnArray();

   if ( ! isset( $d[ 'summaries' ] ) ) exit();  // Bad input

   foreach ( $d[ 'summaries' ] as $item )
   {
      $a = Array();

      
      $a[ 'queued'  ] = $item[ 'waitingJobs' ];
      $a[ 'running' ] = $item[ 'runningJobs' ];

      if (  $a[ 'queued'  ] == ""  ||  $a[ 'queued'  ] < 0 ) $a[ 'queued'  ] = 0;
      if (  $a[ 'running' ] == ""  ||  $a[ 'running' ] < 0 ) $a[ 'running' ] = 0;

      $clusterParts  = explode( ".", $item[ 'resourceId' ] );
      $cluster       = preg_replace( '/\d+$/', "", $clusterParts[ 0 ] );

      if ( $cluster == 'uthscsa-bcf' )   $cluster = 'bcf';
      if ( $cluster == 'uthscsa-alamo' ) $cluster = 'alamo';

      $a[ 'cluster' ] = $cluster;
      
      switch ( $item[ 'resourceStatus' ] )
      {
         case 'UP'     :
            $status = "up";
            break;

         case 'DOWN'   :
            $status = "down";
            break;

         case 'WARN'   :
            $status = "warn";
            break;

         case 'FAILED' :
         default       :
            $status = "unknown";
            break;
      }
      
      $a[ 'status' ]  = $status;

      $data[] = $a;
   }
}

// Put it in the DB

function update( $cluster, $queued, $status, $running )
{
   global $dbhost;
   global $guser;
   global $gpasswd;
   global $gDB;
   global $self;

   $gfac_link = mysql_connect( $dbhost, $guser, $gpasswd );
   $result = mysql_select_db( $gDB, $gfac_link );

   if ( ! $result )
   {
      write_log( "$self: Could not connect to DB $gDB" );
      echo "Could not connect to DB $gDB.\n";
      exit();
   }
      
   $query = "SELECT * FROM cluster_status WHERE cluster='$cluster'";
   $result = mysql_query( $query, $gfac_link );

   if ( ! $result )
   {
      write_log( "$self: Query failed $query - " .  mysql_error( $gfac_link ) );
      echo "$self: Query failed $query - " .  mysql_error( $gfac_link ) . "\n";
      exit();
   }

   $rows = mysql_num_rows( $result );

   if ( $rows == 0 )  // INSERT
   {
      $query = "INSERT INTO cluster_status SET " .
               "cluster='$cluster', " .
               "queued=$queued, "     .
               "running=$running, "   .
               "status='$status'";
   }
   else               // UPDATE
   {
      $query = "UPDATE cluster_status SET " .
               "queued=$queued, "     .
               "running=$running, "   .
               "status='$status' "    .
               "WHERE cluster='$cluster'";
   }

   $result = mysql_query( $query, $gfac_link );

   if ( ! $result )
   {
      write_log( "$self: Query failed $query - " .  mysql_error( $gfac_link ) );
      echo "$self: Query failed $query - " .  mysql_error( $gfac_link ) . "\n";
   }
}

// Get local cluster status

function local_status()
{
   global $self;
   global $data;

//   $clusters = array( "alamo", "jacinto", "bcf" );
   $clusters = array( "alamo", "jacinto" );
//   $clusters = array( "alamo" );
   foreach ( $clusters as $clname )
   {
      $a      = Array();
      if ( $clname == "alamo" )
      {
         $qstat  = `ssh $clname '/usr/bin/qstat -B 2>&1|tail -1'`;

         $sparts = preg_split( '/\s+/', $qstat );
         $que    = $sparts[ 3 ];
         $run    = $sparts[ 4 ];
         $sta    = $sparts[ 10 ];
      }
      else  
      {
         $qstat  = `ssh $clname '/opt/torque/bin/qstat -B 2>&1|tail -1'`;

         $sparts = preg_split( '/\s+/', $qstat );
         $que    = $sparts[ 3 ];
         $run    = $sparts[ 4 ];
         $sta    = $sparts[ 9 ];
      }

//echo "$self: cln que run sta   $clname $que $run $sta \n";

      if ( $sta == "Active" )
      {
         $sta    = "up";
      }
      else
      {
         $sta    = "down";
         $que    = "0";
         $run    = "0";
      }

      $a[ 'cluster' ] = $clname;
      $a[ 'queued'  ] = $que;
      $a[ 'running' ] = $run;
      $a[ 'status'  ] = $sta;

      $data[] = $a;
      $a[ 'cluster' ] = $clname . "-local";
      $data[] = $a;
   }
}

class XML_Array 
{
    var $_data   = Array();
    var $_name   = Array();
    var $_rep    = Array();
    var $_parser = 0;
    var $_level  = 0;
    var $_index  = 0;

    function XML_Array( &$data )
    {
        $this->_parser = xml_parser_create();

        xml_set_object                ( $this->_parser, $this );
        xml_parser_set_option         ( $this->_parser, XML_OPTION_CASE_FOLDING, false );
        xml_set_element_handler       ( $this->_parser, "_startElement", "_endElement" );
        xml_set_character_data_handler( $this->_parser, "_cdata" );

        $this->_data  = array();
        $this->_level = 0;

        if ( ! xml_parse( $this->_parser, $data, true ) )
           return false;

        xml_parser_free( $this->_parser );
    }

    function & ReturnArray() 
    {
        return $this->_data[ 0 ];
    }

    function _startElement( $parser, $name, $attrs )
    {
        if ( $name == "resourceHealth" ) 
        {
##           $name .= $this->_index;
           $this->_index++;
        }

        if ( ! isset( $this->_rep[ $name ] ) ) $this->_rep[ $name ] = 0;
        
        $this->_addElement( $name, $this->_data[ $this->_level ], $attrs );
        $this->_name[ $this->_level ] = $name;
        $this->_level++;
    }
    
    function _endElement( $parser, $name ) 
    {
       if ( isset( $this->_data[ $this->_level ] ) )
       {
          $this->_addElement( $this->_name[ $this->_level - 1 ],
                              $this->_data[ $this->_level - 1 ],
                              $this->_data[ $this->_level ]
                            );
       }

       unset( $this->_data[ $this->_level ] );
       $this->_level--; 
       $this->_rep[ $name ]++; 
    }

    function _cdata( $parser, $data ) 
    {
        if ( $this->_name[ $this->_level - 1 ] ) 
        {
           $this->_addElement( $this->_name[ $this->_level - 1 ],
                               $this->_data[ $this->_level - 1 ],
                               str_replace( array( "&gt;", "&lt;","&quot;", "&amp;" ), 
                                            array( ">"   , "<"   , '"'    , "&" ), 
                                            $data 
                                          ) 
                             );
        }
    }

    function _addElement( &$name, &$start, $add = array() ) 
    {
        if ( ( sizeof( $add ) == 0 && is_array( $add ) ) || ! $add ) 
        {
           if ( ! isset( $start[ $name ] ) ) $start[ $name ] = '';
           $add = '';
        }

        $update = &$start[ $name ];

        if     ( is_array( $add) && 
                 is_array( $update ) ) $update += $add;
        elseif ( is_array( $update ) ) return;
        elseif ( is_array( $add    ) ) $update  = $add;
        elseif ( $add              )   $update .= $add;
    }
}
?>