# This file is related to Radicale - CalDAV and CardDAV server
#  for logwatch (script)
# Copyright © 2024-2026 Peter Bieringer <pb@bieringer.de>
#
# Detail levels
# <  5 : Request + ResponseCounters
# >= 5 : incl. Logins
# >= 10: incl. ResponseTimes + ResponseSize
# >= 15: incl. ResponseTimes + ResponseSize incl. RequestFlags
# >= 18: incl. UserAgents
# >= 20: incl. Locations where supported, anonymize logins

use Digest::SHA;

$Detail = $ENV{'LOGWATCH_DETAIL_LEVEL'} || 0;

my %ResponseTimesLocUsr;
my %ResponseSizesLocUsr;
my %ResponseTimes;
my %ResponseSizes;
my %Responses;
my %Requests;
my %UserAgents;
my %Logins;
my %Loglevel;
my %OtherEvents;

my %Locations;
my %LocationsFile;
my %LoginsHash;

my $sum;
my $length;

sub ResponseTimesMinMaxSum($$) {
   my $req = $_[0];
   my $time = $_[1];

   $ResponseTimes{$req}->{'cnt'}++;

   if (! defined $ResponseTimes{$req}->{'min'}) {
      $ResponseTimes{$req}->{'min'} = $time;
   } elsif ($ResponseTimes{$req}->{'min'} > $time) {
      $ResponseTimes{$req}->{'min'} = $time;
   }

   if (! defined $ResponseTimes{$req}->{'max'}) {
      $ResponseTimes{$req}{'max'} = $time;
   } elsif ($ResponseTimes{$req}->{'max'} < $time) {
      $ResponseTimes{$req}{'max'} = $time;
   }

   $ResponseTimes{$req}->{'sum'} += $time;
}

sub ResponseSizesMinMaxSum($$$) {
   my $req = $_[0];
   my $type = $_[1];
   my $size = $_[2];

   $ResponseSizes{$type}->{$req}->{'cnt'}++;

   if (! defined $ResponseSizes{$type}->{$req}->{'min'}) {
      $ResponseSizes{$type}->{$req}->{'min'} = $size;
   } elsif ($ResponseSizes{$type}->{$req}->{'min'} > $size) {
      $ResponseSizes{$type}->{$req}->{'min'} = $size;
   }

   if (! defined $ResponseSizes{$type}->{$req}->{'max'}) {
      $ResponseSizes{$type}->{$req}{'max'} = $size;
   } elsif ($ResponseSizes{$type}->{$req}->{'max'} < $size) {
      $ResponseSizes{$type}->{$req}{'max'} = $size;
   }

   $ResponseSizes{$type}->{$req}->{'sum'} += $size;
}

sub Sum($) {
   my $phash = $_[0];
   my $sum = 0;
   foreach my $entry (keys %$phash) {
      $sum += $phash->{$entry};
   }
   return $sum;
}

sub MaxLength($) {
   my $phash = $_[0];
   my $length = 0;
   foreach my $entry (keys %$phash) {
      $length = length($entry) if (length($entry) > $length);
   }
   return $length;
}

sub ConvertTokens($) {
   my %tokens_h;
   # unique
   foreach my $token (split(" ", $_[0])) {
      $tokens_h{$token} = 1;
   }
   # map tokens
   my @result_a;
   if (defined $tokens_h{"sync-token"}) {
      push @result_a, "ST";
   }
   if (defined $tokens_h{"sync-collection"}) {
      push @result_a, "SC";
   }
   if (defined $tokens_h{"getctag"}) {
      push @result_a, "GCT";
   }
   if (defined $tokens_h{"getetag"}) {
      push @result_a, "GET";
   }
   # TODO: add potential others which causing long duration
   $result = "";
   if (scalar(@result_a) > 0) {
      $result = ":F=" . join(",", @result_a);
   }
   return $result;
}

sub ConvertLoc($) {
   my $loc = $_[0];
   if (defined $Locations{$loc}) {
      # from cache
      return ":L=" . $Locations{$loc};
   } elsif (defined $LocationsFile{$loc}) {
      # from cache
      return ":L=" . $LocationsFile{$loc};
   }

   if ($loc =~ /\/'$/o) {
      $Locations{$loc} = "L=" . substr(Digest::SHA::sha256_hex($loc), 0, 8);
      return ":" . $Locations{$loc};
   } else {
      $LocationsFile{$loc} = "L=<FILE>";
      return ":" . $Locations{$loc};
   }
}

sub ConvertLogin($) {
   my $login = $_[0];
   if (defined $LoginsHash{$loginc}) {
      # from cache
      return $LoginsHash{$login};
   }

   $LoginsHash{$login} = "U=" . substr(Digest::SHA::sha256_hex($login), 0, 8);
   return $LoginsHash{$login};
}

while (defined($ThisLine = <STDIN>)) {
   # count loglevel
   if ( $ThisLine =~ /\[(DEBUG|INFO|WARNING|ERROR|CRITICAL)\] /o ) {
      $Loglevel{$1}++
   }       
  
   # parse log for events
   if ( $ThisLine =~ /Radicale server ready/o ) {
      $OtherEvents{"Radicale server started"}++;
   }
   elsif ( $ThisLine =~ /Stopping Radicale/o ) {
      $OtherEvents{"Radicale server stopped"}++;
   }
   elsif ( $ThisLine =~ / (\S+) response status/o ) {
      my $req = $1;
      if ( $ThisLine =~ / \S+ response status for (.*) with depth '(\d)' in ([0-9.]+) seconds: (\d+)/o ) {
         $req .= ":D=" . $2 . ":R=" . $4;
         $req .= ConvertLoc($1) if ($Detail >= 20);
         ResponseTimesMinMaxSum($req, $2) if ($Detail >= 10);
      } elsif ( $ThisLine =~ / \S+ response status for (.*) in ([0-9.]+) seconds: (\d+)/o ) {
         $req .= ":R=" . $3;
         $req .= ConvertLoc($1) if ($Detail >= 20);
         ResponseTimesMinMaxSum($req, $1) if ($Detail >= 10);
      } elsif ( $ThisLine =~ / \S+ response status for (.*) with depth '(\d)' in ([0-9.]+) seconds (\S+) (\d+) bytes: (\d+)/o ) {
         $req .= ":D=" . $2 . ":R=" . $6;
         $req .= ConvertLoc($1) if ($Detail >= 20);
         ResponseTimesMinMaxSum($req, $3) if ($Detail >= 10);
         ResponseSizesMinMaxSum($req, $4, $5) if ($Detail >= 10);
      } elsif ( $ThisLine =~ / \S+ response status for (.*) in ([0-9.]+) seconds (\S+) (\d+) bytes: (\d+)/o ) {
         $req .= ":R=" . $5;
         $req .= ConvertLoc($1) if ($Detail >= 20);
         ResponseTimesMinMaxSum($req, $2) if ($Detail >= 10);
         ResponseSizesMinMaxSum($req, $3, $4) if ($Detail >= 10);
      } elsif ( $ThisLine =~ / \S+ response status for (.*) with depth '(\d)' in ([0-9.]+) seconds (\S+) (\d+) bytes \((.*)\): (\d+)/o ) {
         $req .= ":D=" . $2 . ":R=" . $7;
         $req .= ConvertLoc($1) if ($Detail >= 20);
         $req .= ConvertTokens($6) if ($Detail >= 15);
         ResponseTimesMinMaxSum($req, $3) if ($Detail >= 10);
         ResponseSizesMinMaxSum($req, $4, $5) if ($Detail >= 10);
      } elsif ( $ThisLine =~ / \S+ response status for (.*) in ([0-9.]+) seconds (\S+) (\d+) bytes \((.*)\): (\d+)/o ) {
         $req .= ":R=" . $6;
         $req .= ConvertLoc($1) if ($Detail >= 20);
         $req .= ConvertTokens($6) if ($Detail >= 15);
         ResponseTimesMinMaxSum($req, $2) if ($Detail >= 10);
         ResponseSizesMinMaxSum($req, $3, $4) if ($Detail >= 10);
      }
      $Responses{$req}++;
   }
   elsif ( $ThisLine =~ / (\S+) request for ('[^']+')/o ) {
      my $req = $1;
      my $loc = $2;
      if ( $ThisLine =~ / with depth '(\d)' received/o ) {
         $req .= ":D=" . $1;
      }
      $req .= ConvertLoc($loc) if ($Detail >= 20);
      $Requests{$req}++;

      if ( $ThisLine =~ /using ('.*')/o ) {
         my $ua = $1;
         # remove unexpected chars
         $ua =~ s/[\x00-\x1F\x7F-\xFF]//g;
         $ua .= ConvertLoc($loc) if ($Detail >= 20);
         $UserAgents{$ua}++ if ($Detail >= 18);
      }
   }
   elsif ( $ThisLine =~ / (Successful login): '([^']+)'/o ) {
      my $login = $2;
      $login = ConvertLogin($login) if ($Detail >= 20);
      $Logins{$login}++ if ($Detail >= 5);
      $OtherEvents{$1}++;
   }
   elsif ( $ThisLine =~ / (Failed login attempt) /o ) {
      $OtherEvents{$1}++;
   }
   elsif ( $ThisLine =~ / (Profiling data per request method \S+) /o ) {
      my $info = $1;
      if ( $ThisLine =~ /(no request seen so far)/o ) {
         $OtherEvents{$info . " - " . $1}++;
      } else {
         $OtherEvents{$info}++;
      };
   }
   elsif ( $ThisLine =~ / (Profiling data per request \S+) /o ) {
      my $info = $1;
      if ( $ThisLine =~ /(suppressed because duration below minimum|suppressed because of no data)/o ) {
         $OtherEvents{$info . " - " . $1}++;
      } else {
         $OtherEvents{$info}++;
      };
   }
   elsif ( $ThisLine =~ /\[(DEBUG|INFO)\] /o ) {
      # skip if DEBUG+INFO
   }
   else {
      # Report any unmatched entries...
      if ($ThisLine =~ /^({\'| )/o) {
         # skip profiling or raw header data
         next;
      };
      if ($ThisLine =~ /^$/o) {
         # skip empty line
         next;
      };
      $ThisLine =~ s/^\[\d+(\/Thread-\d+)?\] //; # remove process/Thread ID
      chomp($ThisLine);
      $OtherList{$ThisLine}++;
   }
}

if ($Started) {
   print "\nStatistics:\n";
   print "   Radicale started: $Started Time(s)\n";
}

if (keys %Loglevel) {
   $sum = Sum(\%Loglevel);
   print "\n**Loglevel counters**\n";
   printf "%-18s | %7s | %9s |\n", "Loglevel", "cnt", "ratio";
   print "-" x42 . "\n";
   foreach my $level (sort keys %Loglevel) {
      printf "%-18s | %7d |  %7.3f%% |\n", $level, $Loglevel{$level}, (($Loglevel{$level} * 100) / $sum);
   }
   print "-" x42 . "\n";
   printf "%-18s | %7d |  %7.3f%% |\n", "", $sum, 100;
}

if (keys %Logins) {
   $sum = Sum(\%Logins);
   $length = MaxLength(\%Logins);
   print "\n**Successful login counters**\n";
   printf "%-" . $length . "s | %7s | %9s |\n", "Login", "cnt", "ratio";
   print "-" x($length + 24) . "\n";
   foreach my $login (sort keys %Logins) {
      printf "%-" . $length . "s | %7d |  %7.3f%% |\n", $login, $Logins{$login}, (($Logins{$login} * 100) / $sum);
   }
   print "-" x($length + 24) . "\n";
   printf "%-" . $length . "s | %7d |  %7.3d%% |\n", "", $sum, 100;
}

if (keys %UserAgents) {
   $sum = Sum(\%UserAgents);
   $length = MaxLength(\%UserAgents);
   print "\n**UserAgent Counters**\n";
   print "*  Location: L=<HASH> -> see below  L=<FILE> -> see raw log\n" if (scalar(keys %Locations) > 0);
   printf "%-" . $length . "s | %7s | %9s |\n", "UserAgent", "cnt", "ratio";
   print "-" x($length + 24) . "\n";
   foreach my $ua (sort keys %UserAgents) {
      printf "%-" . $length . "s | %7d |  %7.3f%% |\n", $ua, $UserAgents{$ua}, (($UserAgents{$ua} * 100) / $sum);
   }
   print "-" x($length + 24) . "\n";
   printf "%-" . $length . "s | %7d |  %7.3d%% |\n", "", $sum, 100;
}

if (keys %Requests) {
   $sum = Sum(\%Requests);
   $length = MaxLength(\%Requests);
   print "\n**Request counters (D=<depth>)**\n";
   print "*  Location: L=<HASH> -> see below  L=<FILE> -> see raw log\n" if (scalar(keys %Locations) > 0);
   printf "%-" . $length . "s | %7s | %9s |\n", "Request", "cnt", "ratio";
   print "-" x($length + 24) . "\n";
   foreach my $req (sort keys %Requests) {
      printf "%-" . $length . "s | %7d |  %7.3f%% |\n", $req, $Requests{$req}, (($Requests{$req} * 100) / $sum);
   }
   print "-" x($length + 24) . "\n";
   printf "%-" . $length . "s | %7d |  %7.3f%% |\n", "", $sum, 100;
}

if (keys %Responses) {
   $sum = Sum(\%Responses);
   $length = MaxLength(\%Responses);
   print "\n**Response result counters ((D=<depth> R=<result>)**\n";
   print "*  Flags: ST:sync-token SC:sync-collection GCT:getctag GET:getetag\n" if ($Detail >= 15);
   print "*  Location: L=<HASH> -> see below  L=<FILE> -> see raw log\n" if (scalar(keys %Locations) > 0);
   printf "%-" . $length . "s | %7s | %9s |\n", "Response", "cnt", "ratio";
   print "-" x($length + 24) . "\n";
   foreach my $req (sort keys %Responses) {
      printf "%-" . $length . "s | %7d |  %7.3f%% |\n", $req, $Responses{$req}, (($Responses{$req} * 100) / $sum);
   }
   print "-" x($length + 24) . "\n";
   printf "%-" . $length . "s | %7d |  %7.3f%% |\n", "", $sum, 100;
}

if (keys %ResponseTimes) {
   $length = MaxLength(\%ResponseTimes);
   print "\n**Response timings (counts, seconds) (D=<depth> R=<result> F=<flags>)**\n";
   print "*  Flags: ST:sync-token SC:sync-collection GCT:getctag GET:getetag\n" if ($Detail >= 15);
   print "*  Location: L=<HASH> -> see below  L=<FILE> -> see raw log\n" if (scalar(keys %Locations) > 0);
   printf "%-" . $length . "s | %7s | %7s | %7s | %7s |\n", "Response", "cnt", "min", "max", "avg";
   print "-" x($length + 42) . "\n";
   foreach my $req (sort keys %ResponseTimes) {
      printf "%-" . $length . "s | %7d | %7.3f | %7.3f | %7.3f |\n", $req
         , $ResponseTimes{$req}->{'cnt'}
         , $ResponseTimes{$req}->{'min'}
         , $ResponseTimes{$req}->{'max'}
         , $ResponseTimes{$req}->{'sum'} / $ResponseTimes{$req}->{'cnt'};
   }
   print "-" x($length + 42) . "\n";
}

if (keys %ResponseSizes) {
   for my $type (sort keys %ResponseSizes) {
      $length = MaxLength($ResponseSizes{$type});
      print "\n**Response sizes (counts, bytes: $type) (D=<depth> R=<result>)**\n";
      print "*  Flags: ST:sync-token SC:sync-collection GCT:getctag GET:getetag\n" if ($Detail >= 15);
      print "*  Location: L=<HASH> -> see below  L=<FILE> -> see raw log\n" if (scalar(keys %Locations) > 0);
      printf "%-" . $length . "s | %7s | %9s | %9s | %9s |\n", "Response", "cnt", "min", "max", "avg";
      print "-" x($length + 48) . "\n";
      foreach my $req (sort keys %{$ResponseSizes{$type}}) {
         printf "%-" . $length . "s | %7d | %9d | %9d | %9d |\n", $req
            , $ResponseSizes{$type}->{$req}->{'cnt'}
            , $ResponseSizes{$type}->{$req}->{'min'}
            , $ResponseSizes{$type}->{$req}->{'max'}
            , $ResponseSizes{$type}->{$req}->{'sum'} / $ResponseSizes{$type}->{$req}->{'cnt'};
      }
      print "-" x($length + 48) . "\n";
   }
}

if (keys %OtherEvents) {
   print "\n**Other Events**\n";
   foreach $ThisOne (sort keys %OtherEvents) {
      print "$ThisOne: $OtherEvents{$ThisOne} Time(s)\n";
   }
}

if (keys %OtherList) {
   print "\n**Unmatched Entries**\n";
   foreach $ThisOne (sort keys %OtherList) {
      print "$ThisOne: $OtherList{$ThisOne} Time(s)\n";
   }
}

if (scalar(keys %LoginsHash) > 0) {
   print "\n**Map of login hashes (REMOVE THIS FOR PRIVACY REASONS before submit)**\n";
   $length = MaxLength(\%LoginsHash);
   printf "%-10s | %-" . $length . "s | \n", "Hash", "Login";
   print "-" x($length + 15) . "\n";
   foreach my $login (sort { $LoginsHash{$a} cmp $LoginsHash{$b} } keys %LoginsHash) {
      printf "%10s | %-" . $length . "s |\n", $LoginsHash{$login}, $login;
   }
   print "-" x($length + 15) . "\n";
}

if (scalar(keys %Locations) > 0) {
   print "\n**Map of location hashes (REMOVE THIS FOR PRIVACY REASONS before submit)**\n";
   $length = MaxLength(\%Locations);
   printf "%-10s | %-" . $length . "s | \n", "Hash", "Location";
   print "-" x($length + 15) . "\n";
   foreach my $loc (sort { $Locations{$a} cmp $Locations{$b} } keys %Locations) {
      printf "%10s | %-" . $length . "s |\n", $Locations{$loc}, $loc;
   }
   print "-" x($length + 15) . "\n";
}

exit(0);

# vim: shiftwidth=3 tabstop=3 syntax=perl et smartindent