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#!/usr/bin/perl -w
use strict;
#########################
# newsstat.pl version 0.3



###################################################################
# Collect statistics about the alt.os.linux.mandrake newsgroup.
# Check all articles in the last 7-day period. Rank posters by
# no. of posts and by volume of posts, report on top and bottom
# 20 posters. Show their name, no. posts, size of posts, percentage
# quoted lines. Rank user-agents used, by poster rather than by
# post. Rank top 10 threads. Rank top 10 cross-posted groups.
###################################################################

##################################################################
#                       RECENT CHANGES                           #
# 2004/06/19    - newsgroup name is $ARGV[0]
#               - Allow command line flags for subtracting
#                 output if not pertinent for a group
# 2002/11/09    - Put Garry's writedata() function back in.
#               - added "rn" to my list of UA's
#               - Started using %distinct_agent for both User agent
#               sections
#               - named it newsstat.pl version 0.3
# 2002/11/06    - Fixed the earliest/latest file problem by using
#               mtime rather than ctime, and simplifying the logic
# 2002/11/05    - moved user configurations to the top
#               - fixed the cross-posting section
#               - introduced the $newsgroup_name variable which
#               later becomes $news$group
#               - changed $name to $agent_name in countagents()

########### NEXT #############
# Commas in bottom section of report
# Show date the figures were compiled
# No. of HTML articles (Content-Type: text/html)
# No. of quoted sigs (/>\s*-- /)
# Per cent of top-posted articles
# Top 10 cross-posters
# Top 20 news posting hosts (from Path)
# Count of certain subject words: newbie, kde, burner, sendmail, etc.
# Count *all* User Agents that each poster uses
# What do we do about Bill Unruh's ] quote style?
# Change the way dates/times are checked
# include % share in posters by no. of arts
# include % share in posters by size
# Total, orig & quoted lines by user agent with per cent
# Take arguments, i.e. newsgroup name
#######################################################

###################### USER CONFIGURATIONS ############################

# The name of the group to do stats for
my $newsgroup_name = $ARGV[0];
  $newsgroup_name or &usage;

# Check for removal flags
my $ix;
my $j;
my %skipSec;
my @skiplist;
my $args = @ARGV;
for ( $ix = 1 ; $ix < $args ; $ix++ ) {
       $j = $ix + 1;
       if ( $ARGV[$ix] eq "-x" ) {
               @skiplist = split(",",$ARGV[$j]);
       } elsif ( $ARGV[$ix] =~ /-x(\d.*)/ ) {
               @skiplist = split(",",$1);
       }
}
foreach(@skiplist) {
  $skipSec{$_} = 1;
}

# Leafnode users will want /var/spool/news for this variable.
my $news = "/var/spool/news/";

# How many days are we doing statistics for?
my $numdays = 30;

# no. of agents we list
my $topagents = 10;

# no. of threads we want to know about
my $topthreads = 20;

# no. of top or bottom posters to show
my $topposters = 20;

# no. of cross-posted threads to show
my $topcrossposts = 10;

# no. of time zones to show
my $toptz = 10;



###################### DATA STRUCTURES ######################
my $group = $newsgroup_name;
$group =~ s!\.!/!g;
my %data;                               # name, count, agent, total, orig, quoted
my %threads;                            # subject, count
my %crossposts;                         # group, count
my %tz;                                 # timezones by count
my %headers;                            # holds header of current article
my %lcheader;                           # holds lowercase headers
my @body;                               # holds body of current article
my @sig;                                # holds sig text;
my $totalposts;                         # total no. of posts considered
my $filename;                           # name of current article file
my $filesize;                           # size of current article file
my $earliest;                           # earliest article we have found
my $latest;                             # latest article we have found
my $poster;                             # poster we are dealing with
my $totsize = 0;                        # holds total sizes of all files
my $totheader = 0;                      # total size of header material
my $totbody = 0;                        # total size of body material
my $totsig = 0;                         # total size of sig material
my $totorig = 0;                        # total size of original material
my $totquoted = 0;                      # total size of quoted material
my $origposts = 0;                      # total no. of original posts
my $replies = 0;                        # total no. of replies
my $i;                                  # general purpose
my %distinct_agent;
my %agents =                            # used to hold counts of User Agents used
            (  "KNode"                         => 0,
               "Pan"                           => 0,
               "Mozilla"                       => 0,
               "Sylpheed"                      => 0,
               "Gnus"                          => 0,
               "Forte Agent"                   => 0,
               "Forte Free Agent"              => 0,
               "MicroPlanet Gravity"           => 0,
               "Microsoft Outlook Express"     => 0,
               "Xnews"                         => 0,
               "slrn"                          => 0,
               "tin"                           => 0,
               "rn"                            => 0,
               "NN"                            => 0,
               "MacSOUP"                       => 0,
               "Foorum"                        => 0,
               "MT-NewsWatcher"                => 0,
               "News Rover"                    => 0,
               "WebTV"                         => 0,
               "Compuserver"                   => 0,
               "VSoup"                         => 0);

######################## MAIN CODE ########################
$! = 1;

chdir("$news$group") or die "Can't cd to $news$group: $!\n";
opendir(DIR, ".") or die "Can't open $news$group directory: $!\n";
while (defined($filename = readdir(DIR))) {
 %lcheader = ();
 next unless -f $filename;             # only want real files
 next if ($filename eq ".overview");   # real articles only
 next if (-M $filename > $numdays);    # only want articles <= a certain age
 $earliest = (stat $filename)[9] unless defined ($earliest);
 $latest   = (stat $filename)[9] unless defined ($latest);
 &getarticle($filename);               # read in the article
 &getdata;                             # grab the data from the article
 $totalposts++;                        # bump count of articles considered
}
closedir(DIR);                          # finished with the directory
# post-processing
&countagents;                           # count agents, collapsing versions
&fixpercent;                            # check percentages orig/total for posters

&writedata;

#################### DISPLAY RESULTS #####################
print "=" x 76, "\n";
printf "%s\n", &centred("Analysis of posts to $newsgroup_name", 76);
print "=" x 76, "\n";
printf "%s\n", &centred("(stats compiled with a script by Garry Knight)", 76);
print "\n\n";
printf "Total posts considered: %s over %d days\n",
       commify($totalposts), $numdays;
printf "Earliest article: %s\n", scalar localtime($earliest);
printf "Latest article:   %s\n", scalar localtime($latest);
printf "Original articles: %s, replies: %s\n", commify($origposts), commify($replies);
printf "Total size of posts: %s bytes (%sK) (%.2fM)\n", commify($totsize),
       commify(int($totsize / 1024)), $totsize / 1048576; #
printf "Average %s articles per day, %.2f MB per day, %s bytes per article\n",
       commify(int($totalposts / $numdays)),
       $totsize / $numdays / 1048576, commify(int($totsize / $totalposts));
my $count = keys %data;
printf "Total headers: %s KB  bodies: %s KB\n",
       commify(int($totheader / 1024)), commify(int($totbody / 1024));
printf "Body text - quoted: %s KB,  original: %s KB = %02.2f%%, sigs: %s KB\n",
       commify(int($totquoted / 1024)), commify(int($totorig / 1024)),
       ($totorig * 100) / ($totorig + $totquoted), commify(int($totsig / 1024));
printf "Total number of posters: %s, average %s bytes per poster\n", commify($count),
       commify(int($totsize / $count)); #/
$count = keys %threads;
printf "Total number of threads: %s, average %s bytes per thread\n", commify($count),
       commify(int($totsize / $count)); #/
printf "Total number of User-Agents: %d\n", scalar keys %agents;
print "\n", "=" x 76, "\n";

###############################
# show posters by article count  Sec 1;
###############################
unless ( $skipSec{1} ) {
    if (keys %data < $topposters) {
      $count = keys %data;
    } else {
      $count = $topposters;
    }
    printf "%s\n", &centred("Top $count posters by number of articles", 76);
    print "=" x 76, "\n";
    $i = 0;
    foreach $poster (sort {$data{$b}{count} <=> $data{$a}{count}} keys %data) {
    my $name = substr($poster, 0, 65);
    printf "%2d: %-63s : %6d\n", $i + 1, rpad($poster, 63, "."), $data{$poster}{count};
    last if (++$i == $count);
 }
 print "\n", "=" x 76, "\n";
}

################################
# show posters by size in Kbytes Sec 2;
################################
unless ( $skipSec{2} ) {
  if (keys %data < $topposters) {
    $count = keys %data;
  } else {
    $count = $topposters;
  }
  printf "%s\n", &centred("Top $count posters by article size in Kbytes", 76);
  print "=" x 76, "\n";
  $i = 0;
  foreach $poster (sort {$data{$b}{size} <=> $data{$a}{size}} keys %data) {
    my $name = substr($poster, 0, 62);
    printf "%2d: %-63s : %6d\n", $i + 1, rpad($poster, 63, "."), $data{$poster}{size} / 1024; #/
    last if (++$i == $count);
  }
  print "\n", "=" x 76, "\n";
}

####################################
# show top posters for original text
####################################
unless ( $skipSec{3} ) {
   if (keys %data < $topposters) {
     $count = keys %data;
   } else {
     $count = $topposters;
   }
   printf "%s\n", &centred("Top $count responders by original text (> 5 posts)", 76);
   print "=" x 76, "\n";
   $i = 0;
   foreach $poster (sort { $data{$b}{percent} <=> $data{$a}{percent} } keys %data) {
     next if $data{$poster}{quoted} == 0;
     next if $data{$poster}{count} < 5;
     my $name = substr($poster, 0, 63);
     printf "%2d: %-63s : %02.2f%%\n", $i + 1, rpad($poster, 63, "."), $data{$poster}{percent};
     last if (++$i == $count);
   }
   print "\n", "=" x 76, "\n";
}

#######################################
# show bottom posters for original text
#######################################
unless ( $skipSec{4} ) {
  if (keys %data < $topposters) {
    $count = keys %data;
  } else {
    $count = $topposters;
  }
  printf "%s\n", &centred("Bottom $count responders by original text  (> 5 posts)", 76);
  print "=" x 76, "\n";
  $i = 0;
  foreach $poster (sort { $data{$a}{percent} <=> $data{$b}{percent} } keys %data) {
    next if $data{$poster}{quoted} == 0;
    next if $data{$poster}{count} < 5;
    my $name = substr($poster, 0, 63);
    printf "%2d: %-63s : %02.2f%%\n", $i + 1, rpad($poster, 63, "."), $data{$poster}{percent};
    last if (++$i == $count);
  }
  print "\n", "=" x 76, "\n";
}

####################################
# show threads by number of articles
####################################
unless ( $skipSec{5} ) {
  if (keys %threads < $topthreads) {
    $count = keys %threads;
  } else {
    $count = $topthreads;
  }
  printf "%s\n", &centred("Top $count threads by no. of articles", 76);
  print "=" x 76, "\n";
  $i = 0;
  foreach my $thread (sort {$threads{$b}{count} <=> $threads{$a}{count}} keys %threads) {
    my $name = substr($thread, 0, 65);
    printf "%2d: %-63s : %6d\n", $i + 1, rpad($name, 63, "."), $threads{$thread}{count};
    last if (++$i == $count);
  }
  print "\n", "=" x 76, "\n";
}
################################
# show threads by size in Kbytes
################################
unless ( $skipSec{6} ) {
  if (keys %threads < $topthreads) {
    $count = keys %threads;
  } else {
    $count = $topthreads;
  }
  printf "%s\n", &centred("Top $count threads by size in KB", 76);
  print "=" x 76, "\n";
  $i = 0;
  foreach my $thread (sort {$threads{$b}{size} <=> $threads{$a}{size}} keys %threads) {
    my $name = substr($thread, 0, 65);
    printf "%2d: %-63s : %6d\n", $i + 1, rpad($name, 63, "."), $threads{$thread}{size} / 1024; #/
    last if (++$i == $count);
  }
  print "\n", "=" x 76, "\n";
}

#################################
# show top 10 cross-posted groups
#################################
unless ( $skipSec{7} ) {
delete $crossposts{"$newsgroup_name"};  # don't include ours
if (keys %crossposts < $topcrossposts) {
 $count = keys %crossposts;
} else {
 $count = $topcrossposts;
}
printf "%s\n", &centred("Top $count cross-posted groups", 76);
print "=" x 76, "\n";
$i = 0;
foreach my $name (sort {$crossposts{$b} <=> $crossposts{$a}} keys %crossposts) {
 printf "%2d: %-63s : %6d\n", $i + 1, rpad($name, 63, "."), $crossposts{$name};
 last if (++$i == $count);
}
print "\n", "=" x 76, "\n";
}
#######################
#show agents and counts
#######################
unless ( $skipSec{8} ) {
if (keys %agents < $topagents) {
 $count = keys %agents;
} else {
 $count = $topagents;
}
printf "%s\n", &centred("Top $count User Agents by poster", 76);
print "=" x 76, "\n";
$i = 0;
foreach my $agent (sort {$agents{$b} <=> $agents{$a}} keys %agents) {
 printf "%2d: %-63s : %6d\n", $i + 1, rpad($agent, 63, "."), $agents{$agent};
 last if (++$i == $count);
}
print "\n", "=" x 76, "\n";
}

#######################
#show distinct agents
#######################
unless ( $skipSec{9} ) {
if (keys %distinct_agent < $topagents) {
 $count = keys %distinct_agent;
} else {
 $count = $topagents;
}
printf "%s\n", &centred("Top $count User Agents by number of posts", 76);
print "=" x 76, "\n";
$i = 0;
foreach my $agent (sort {$distinct_agent{$b} <=> $distinct_agent{$a}} keys %distinct_agent) {
printf "%2d: %-58s : %5d (%2.f%%)\n", $i + 1, rpad($agent, 58, "."), $distinct_agent{$agent}, (( $distinct_agent{$agent} / $totalposts ) * 100);
 last if (++$i == $count);
}
print "\n", "=" x 76, "\n";
}

##########################
#show timezones and counts
##########################
unless ( $skipSec{10} ) {
if (keys %tz < $toptz) {
 $count = keys %tz;
} else {
 $count = $toptz;
}
printf "%s\n", &centred("Top 10 time zones", 76);
print "=" x 76, "\n";
$i = 0;
foreach my $zone (sort {$tz{$b} <=> $tz{$a}} keys %tz) {
 printf "%2d: %-63s : %6d\n", $i + 1, rpad($zone, 63, "."), $tz{$zone};
 last if (++$i == $count);
}
print "\n", "=" x 76, "\n";
}


################################ SUBROUTINES ################################


#######################################
# get current article's header and body
#######################################
sub getarticle {
 %headers = ();                        # dump old headers
 my $filename = shift;                 # get the name of the file
# get stats about the file itself
 $filesize = -s $filename;             # get total size of file
 $totsize += $filesize;                # bump total sizes of all files

 my $mtime = (stat $filename)[9];
 if ( $mtime < $earliest ) {
    $earliest = $mtime;
 } elsif ( $mtime > $latest ) {
    $latest = $mtime;
 }

# now read the file
 open(FILE, $filename) or die "Can't open $filename: $!\n";
 while (<FILE>) {
   $totheader += length($_);           # bump total header size
   last if (/^\s*$/);                  # end of header?
   if (/^([^:\s]*):\s+(.*)/) {
     my($key,$val) = ($1,$2);
     $headers{$key} = $val;
     $lcheader{clean(lc($key))} = clean($val);
  }
 }
 @body = <FILE>;                       # slurp up body
 close(FILE);
} # getarticle

###################################
# get data from the current article
###################################
sub getdata {
#### First, analyse header fields ####

# Set up this poster if not defined, get counts, sizes
 $poster = $headers{From};             # get the poster's name
 if (!defined($data{$poster})) {       # seen this one before?
   $data{$poster}{agent} = 'Unknown';  # comes after For: field
   $data{$poster}{orig} = 0;
   $data{$poster}{quoted} = 0;
 }
 $data{$poster}{count}++;      # bump count for this poster
 $data{$poster}{size} += $filesize;    # total size of file

# The User-Agent and/or X-Newsreader fields
# for User-Agent by poster
 if (defined $lcheader{"user-agent"}) {
   $data{$poster}{agent} = $lcheader{"user-agent"};
 }
 if (defined $lcheader{"x-newsreader"}) {
   $data{$poster}{agent} = $lcheader{"x-newsreader"};
 }

# The User Agent for User-Agent by number of posts
 my $UA = "unknown";
 foreach my $keys ( keys %lcheader )
 {
   if (defined $lcheader{'user-agent'})
   {
           $UA = $lcheader{'user-agent'};
   }
    elsif (defined $lcheader{"x-newsreader"})
   {
           $UA = $lcheader{"x-newsreader"};
   }
   elsif (defined $lcheader{'x-mailer'})
   {
           $UA = $lcheader{'x-mailer'};
   }
   elsif ((defined $lcheader{'organization'}) &&
         ($lcheader{'organization'} =~ /groups\.google|AOL|Supernews|WebTV|compuserve/))
   {
           $UA = $lcheader{'organization'};
   }
   elsif ( $lcheader{'message-id'} =~ /pine/i )
   {
           $UA = "Pine";
   } ## Hopefully found UA, else set to unknown
 }


$UA = clean($UA);
$UA = get_agent($UA);


sub get_agent {
 my $raw = shift;
 my $agent = $raw;

 ## strip http
 if ( $raw =~ /.*http.*/ ) {
   $raw =~ s!posted via!!i;
   $raw =~ s!http://!!g;
   $raw =~ s!/!!g;
   $raw =~ s! !!g;
 }

 ## Fix Outlook from Mac
 if ( $raw =~ /^microsoft/i ) { $raw =~ s/-/ /g;}

 ## Pick out the popular agents
 if ( $raw =~ /(outlook express)/i     ||
      $raw =~ /(microplanet gravity)/i ||
      $raw =~ /(news rover)/i          ||
      $raw =~ /(forte agent)/i         ||
      $raw =~ /(forte free agent)/i
    )
 {
       $agent = $1;
 }
 elsif ( $raw =~ /^(
        pan
       |sylpheed
       |slrn
       |mozilla
       |knode
       |tin
       |hamster
       |xrn
       |xnews
       |aol
       |gnus
       |krn
       |macsoup
       |messenger
       |openxp
       |pine
       |thoth
       |turnpike
       |winvn
       |vsoup
       |google
       |supernews
       |nn
       |rn
       |007
       |webtv
       |compuserve
       )/ix )
 {
       $agent = $1;
 }
 else
 {
 ## Clean up unknown agents
       if ( $raw =~ m!^(.*?)/! ) {
             $agent = $1;
       }
       elsif ( $raw =~ /^(\w*)\d.*/ )
       {
            $agent = $1;
       }
  }

$distinct_agent{$agent}++;
return $agent;
}


# Get all cross-posted newsgroups
 for (split /,/, $headers{"Newsgroups"}) {
   $crossposts{$_}++;          # bump count for each
 }

# Get threads
 my $thread = $headers{"Subject"};
 $thread =~ s/^re: //i;                # Remove Re: or re: at start
 $thread =~ s/\s+/ /g;                 # collapse whitespace
 $threads{$thread}{count} += 1;        # bump count of this subject
 $threads{$thread}{size} += $filesize; # bump bytes for this thread

# Is this an original post or a reply?
 if (defined $headers{"References"}) {
   $replies++;
 } else {
   $origposts++;
 }

# Get the time zone
 $_ = $headers{"Date"};
 my ($tz) = /\d\d:\d\d:\d\d\s+(.*)/;
 if (($tz =~ /UTC/) or ($tz =~ /GMT/) or ($tz =~ /0000/)) {
   $tz = "UTC";
 }
 $tz{$tz}++;

#### Now analyse the body text ####
 my $insig = 0;
 for (@body) {
   $totbody += length($_);             # bump total body size
   next if (/^$>/);                    # don't count blank lines in body
   if ($insig == 1) {
     $totsig += length($_);            # bump total sig size
# Bill Unruh uses ] quotes, and another poster uses ::
   } elsif (/^\s*[>\]]/ or /^\s*::/) {         # are we in a quote line?
     $data{$poster}{quoted} += length($_);     # bump count of quoted chrs
     $totquoted += length($_);
   } elsif (/-- /) {
     $insig = 1;
   } else {
# we must be processing an original line
     $data{$poster}{orig} += length($_); # bump count of original chrs
     $totorig += length($_);
   }
 } # end for (@body)

} # getdata

########################################
# Count the User-Agents used, collapsing
# different versions into one per agent.
########################################
sub countagents {
POSTER:
 foreach $poster (keys %data) {
   foreach my $agent_name (keys %distinct_agent) {     # check against known ones
     if ( $data{$poster}{agent} =~ /\Q$agent_name\E/ ) {
       $agents{$agent_name}++;
       next POSTER;
     }
   }
   $agents{$data{$poster}{agent}}++;
 }
} # countagents

############################################
# set orig/total percentages for all posters
############################################
sub fixpercent {
 foreach $poster (keys %data) {
   my $percent = 100;
   if (($data{$poster}{orig} != 0) and ($data{$poster}{quoted} != 0)) {
     $percent = $data{$poster}{orig} * 100 / ($data{$poster}{quoted} + $data{$poster}{orig}); #/
   } elsif ($data{$poster}{orig} == 0) {
     $percent = 0;
   }
   $data{$poster}{percent} = $percent;
 }
}

##############################
# right pad a string with '.'s
##############################
sub rpad {
# get text to pad, length to pad, pad chr
 my ($text, $pad_len, $pad_chr) = @_;
 if (length($text) > $pad_len) {
   $text = substr($text, 0, $pad_len);
 }
 my $padded = $text . $pad_chr x ( $pad_len - length( $text ) );
 return $padded;
}

#################
# centre a string
#################
sub centred {
 my ($text, $width) = @_;              # text to centre, size of field to centre in
 my $pad_len = ($width - length($text)) / 2;   #/
 my $centred = " " x $pad_len . $text;
 return $centred;
}

##########################
# put commas into a number
##########################
sub commify {
 $_  = shift;
 1 while s/^(-?\d+)(\d{3})/$1,$2/;
 return $_;
}

#########################
# clean
#########################
sub clean {
 my $dirty = shift;
 my $clean = $dirty;
 $clean =~ s/^\s*//;
 $clean =~ s/\s*$//;

return $clean;
}


sub usage {

 print "usage: newstat.pl newsgroupname\n";
 exit 1;
}

###################################
# Write data structures to a file #
###################################
sub writedata {
 open OUTF, ">/tmp/XDATA" or die "Can't create XDATA: $!\n";
 print OUTF "Data collected from alt.os.linux.mandrake\n\n";
 print OUTF "Poster Data\nname : agent : count : size: orig : quoted : per cent\n";
 foreach my $name (keys %data) {
   print OUTF "$name : $data{$name}{agent} : $data{$name}{count} : $data{$name}{size} : $data{$name}{orig} : $data{$name}{quoted} : $data{$name}{percent}\n";
 }
 print OUTF "============================================================================\n";
 print OUTF "Thread subjects\n";
 print OUTF "----------------------------------------------------------------------------\n";
 foreach my $thread (sort {"\L$a" cmp "\L$b"} keys %threads) {
   print OUTF "$thread : $threads{$thread}{count} : $threads{$thread}{size}\n";
 }
 print OUTF "============================================================================\n";
 print OUTF "Cross-posts\n";
 print OUTF "----------------------------------------------------------------------------\n";
 foreach my $name (sort keys %crossposts) {
   print OUTF "$name : $crossposts{$name}\n";
 }
 print OUTF
 print OUTF "============================================================================\n";
 print OUTF "User agents\n";
 print OUTF "----------------------------------------------------------------------------\n";
 foreach my $name (sort keys %agents) {
   print OUTF "$name : $agents{$name}\n";
 }
 print OUTF "============================================================================\n";
 print OUTF "Time zones\n";
 print OUTF "----------------------------------------------------------------------------\n";
 foreach my $name (sort keys %tz) {
   print OUTF "$name : $tz{$name}\n";
 }
 close OUTF;
} # writedata