#!/usr/bin/perl -w
use strict;
#--
#-- Script:    SETIStat.pl
#-- Purpose:   Displays the information for the SETI@Home PM group
#--
#-- Author:    Robert(Bob) Smith
#-- Date:      December 11, 2001
#--
#-- Wish List: Add error handling if the requested HTML page is not retrieved
#--
#-- Rev Hist:  00.00.a 2001-12-11 rws  Initial version
#--
#-- Notes:     This script was created as a learning example for HTML::TableExtract
#--

#-- Use modules
use HTML::TableExtract;
use HTTP::Request::Common;
use LWP::UserAgent;


#-- Define constants
use constant VERSION                   => '00.00.a';

use constant FIELD_DELIM               => ',';
use constant SETI_URL                  => 'http://setiathome.ssl.berkeley.edu/stats/team/team_86606.html';

use constant ERR                       =>
  {
    'ok'                               => 0,
  };


#-- Define variables
my $gExtractedTable;                   #  Table extracted from the HTML
my $gHTMLPage;                         #  Retrieved HTML page
my $gName;                             #  Member's name
my $gRank;                             #  Member's ranking
my $gRow;                              #  Pointer to rows in extracted tables
my $gTable;                            #  Pointer to extracted tables
my $gUserAgent;                        #  LWP::UserAgent


#-- Retrieve the HTML page
$gUserAgent = LWP::UserAgent->new;
$gHTMLPage = $gUserAgent->request(GET SETI_URL);


#-- Extract the table
#--
#-- Note: TableExtract will handle tables nested within tables (outermost table is depth==0)
#--       as well as multiple tables within the same HTML document (first table is count==0).
#--       Since the information I wish to extract is not nested, depth will be 0, and since
#--       it is the second table on the page (the first table is the group description,
#--       web site, number of members, etc...,) the count will be 1.
#--
$gExtractedTable = HTML::TableExtract->new(depth => 0, count => 1);
$gExtractedTable->parse($gHTMLPage->content);


#-- Display information
foreach $gTable ($gExtractedTable->table_states)
{
  foreach $gRow ($gTable->rows)
  {

    #-- Print data row
    if ($$gRow[0]=~/^(\d+)\)\s*/)
    {
      ($gRank, $gName)=($1,$');
      $gName=$` if $gName=~/[\s\n]+$/;
      $$gRow[2]=$' if $$gRow[2]=~/^\s+/;

      print $gRank, FIELD_DELIM,
            $gName, FIELD_DELIM,
            $$gRow[1], FIELD_DELIM,
            $$gRow[2], FIELD_DELIM,
            $$gRow[3], "\n";
    }

    #-- Print header row
    else
    {
      $$gRow[1]=~tr/\n/ /;
      $$gRow[3]=~tr/\n/ /;

      print 'Rank', FIELD_DELIM,
            $$gRow[0], FIELD_DELIM,
            $$gRow[1], FIELD_DELIM,
            $$gRow[2], FIELD_DELIM,
            $$gRow[3], "\n";
    }
  }
}


#-- Exit
exit(ERR->{ok});


#-- End of script