#!/usr/bin/perl
use IO::File;
use Image::Magick;
 print "Content-type: text/html\n\n";
 print "<body bgcolor=\"#FFFFFF\">\n";
  my ($texfile,$laystyle,$numberofcolumns,$selectionmade) = split(/&/,$ENV{'QUERY_STRING'});
  my $figfile = $texfile;
  $figfile =~ s/^([^\.]+printout)[^t]+\.tex/$1\.dat/;
  my $duefile = $texfile;
  $duefile =~ s/^([^\.]+printout)[^t]+\.tex/$1\.due/;
  #do we have figures?
  if (-e $figfile) {
      my $temporary_file=IO::File->new($figfile) || die "Couldn't open file for reading: $!\n";
      my @content_of_file = <$temporary_file>;
      close $temporary_file;  
      my $noteps;
      foreach $not_eps (@content_of_file) {
	  if ($not_eps ne '') {
	      my $eps_f = $not_eps;
	      $eps_f =~ s/\.[^.]*$/\.eps/i;
	      $_ = $eps_f;
	      m/\/([^\/]+)$/;
	      $eps_f = '/home/httpd/prtspool/'.$1;
	      my $image = Image::Magick->new;
	      $not_eps =~ s/^\s+//;
	      $not_eps =~ s/\s+$//;
	      $status = $image->Read($not_eps);
	      if ($status) {print "  $status  ";}
	      $image->Set(page => '+100+200'); 
	      $status = $image->Write($eps_f);	    
	      if ($status) {print "  $status  ";}
              #check is eps exist in prtspool
              if(not -e $eps_f) {
		  for (my $i=0;$i<10000;$i++) {
		      if (-e $eps_f.'.'.$i) {
			  rename $eps_f.'.'.$i, $eps_f;
			  last;
		      }
		  }
	      }  
	  }
      }
      unlink $figfile;
  }
  #print "$texfile\n"; #name of the tex file for debugging only
  if (-e $texfile) {
      $texfile =~ m/^(.*)\/([^\/]+)$/; 
      my $name_file = $2;
      my $path_file = $1.'/';
      chdir $path_file;
      system("latex $name_file 1>/dev/null 2>/dev/null");
      if ($selectionmade>=10) {system("latex $name_file 1>/dev/null 2>/dev/null");} #to create table of contents
      my $idxname=$name_file;
      $idxname=~s/\.tex$/\.idx/;
      if ($selectionmade>=100) {
	  system("makeindex $idxname");
	  system("latex $name_file 1>/dev/null 2>/dev/null");
      } #to create index
      #Do we have a latex error in the log file?
      my $logfilename = $texfile;
      $logfilename =~ s/\.tex$/\.log/;
      my $temporary_file=IO::File->new($logfilename) || die "Couldn't open file for reading: $!\n";
      my @content_of_file = <$temporary_file>;
      close $temporary_file; 
      my $body_log_file = join(' ',@content_of_file);
      $logfilename =~ s/\.log$/\.html/;
      $temporary_file = IO::File->new('>'.$logfilename); 
      print $temporary_file '<html><head><title>LOGFILE</title></head><body><pre>'.$body_log_file.'</pre></body></html>'."\n";
      if ($body_log_file=~m/!\s+Emergency stop/) {
	  #LaTeX failed to parse tex file 
	  print "<h2>LaTeX could not successfully parse your tex file.</h2>";
	  print "It probably has errors in it.<br />";
	  my $whereitbegins = rindex $body_log_file,'STAMPOFPASSEDRESOURCESTART';
	  my $whereitends = rindex $body_log_file,'STAMPOFPASSEDRESOURCEEND';
	  if ($whereitbegins!=-1 and $whereitends!=-1) {
	      print "With very high probability this error occured in ".substr($body_log_file,$whereitbegins+26,$whereitends-$whereitbegins-26)."<br /><br />";
	  }
	  print "Here are the error messages in the LaTeX log file</br><br />";
	  my $sygnal = 0;
	  for (my $i=0;$i<=$#content_of_file;$i++) {
	      if ($content_of_file[$i]=~m/^Runaway argument?/ or $content_of_file[$i]=~m/^!/) {
		  $sygnal = 1;
	      } 
	      if ($content_of_file[$i]=~m/Here is how much of/) {
		  $sygnal = 0;
	      } 
	      if ($sygnal) {
		  print "$content_of_file[$i]<br />";
	      }  
	  } 
      } elsif ($body_log_file=~m/<inserted text>/) {
	  my $whereitbegins = index $body_log_file,'<inserted text>';
	  print "You are running LaTeX in the <b>batch mode</b>.";
	  while ($whereitbegins != -1) {
	      my $tempobegin=$whereitbegins;
	      $whereitbegins = rindex $body_log_file,'STAMPOFPASSEDRESOURCESTART',$whereitbegins;
	      my $whereitends = index $body_log_file,'STAMPOFPASSEDRESOURCEEND',$whereitbegins;
	      print "<br />It has found an error in".substr($body_log_file,$whereitbegins+26,$whereitends-$whereitbegins-26)." <br /> and corrected it.\n";
	      print "Usually this correction is valid but you probably need to check the indicated resource one more time and implement neccessary corrections by yourself.\n";
	      $whereitbegins = index $body_log_file,'<inserted text>',$tempobegin+10;
	  }
	  $name_file =~ s/\.tex/\.dvi/;
	  my $new_name_file = $name_file;
	  $new_name_file =~ s/\.dvi/\.ps/;
	  my $comma = "dvips -Ppdf -G0 -o $new_name_file";
	  system("$comma $name_file 1>/dev/null 2>/dev/null");
	  if (-e $new_name_file) {
	      print "<h1>PDF output file (see link below)</h1>\n";
	      $new_name_file =~ m/^(.*)\./;
	      my $tempo_file = $1.'temporar.ps';
	      my $name_file = $1.'.pdf';
	      if ($laystyle eq 'album' and $numberofcolumns eq '2') {
		  $comma = "psnup -2 -s1.0 $new_name_file";
		  system("$comma $tempo_file 1>/dev/null 2>/dev/null"); 
		  system("ps2pdf $tempo_file $name_file 1>/dev/null 2>/dev/null");
	      } elsif ($laystyle eq 'book' and $numberofcolumns eq '2') {
		  $comma = 'pstops -pletter "2:0+1(0.48w,0)"';
		  system("$comma $new_name_file $tempo_file 1>/dev/null 2>/dev/null");
		  system("ps2pdf $tempo_file $name_file 1>/dev/null 2>/dev/null");
	      } else {
		  system("ps2pdf $new_name_file $name_file 1>/dev/null 2>/dev/null");
	      }	    
	      my $texlog = $texfile;
	      my $texaux = $texfile;
	      my $texdvi = $texfile;
	      my $texps = $texfile;
	      $texlog =~ s/\.tex/\.log/;
	      $texaux =~ s/\.tex/\.aux/;
	      $texdvi =~ s/\.tex/\.dvi/;
	      $texps =~ s/\.tex/\.ps/;
	      my @garb = ($texaux,$texdvi,$texps);
#	  unlink @garb;
	      unlink $duefile;
	      print "<a href=\"/prtspool/$name_file\">Your PDF document</a>";
	      print "<br /><br />";
              print "<b><big>The link to ";
              $logfilename=~s/\/home\/httpd//;
	      print "<a href=\"$logfilename\">Your log file </a></big></b>";
	      print "\n";
              #link tooriginal LaTeX file (included according Michael Hamlin desire)
	      my $tex_temporary_file=IO::File->new($texfile) || die "Couldn't open file for reading: $!\n";
	      my @tex_content_of_file = <$tex_temporary_file>;
	      close $tex_temporary_file; 
	      my $body_tex_file = join(' ',@tex_content_of_file);
	      $texfile =~ s/\.tex$/aaaaa\.html/;
	      $tex_temporary_file = IO::File->new('>'.$texfile); 
	      print $tex_temporary_file '<html><head><title>LOGFILE</title></head><body><pre>'.$body_tex_file.'</pre></body></html>'."\n";
	      print "<br /><br />";
	      print "<b><big>The link to ";
	      $texfile=~s/\/home\/httpd//;
	      print "<a href=\"$texfile\">Your original LaTeX file </a></big></b>";
	      print "\n";
	  }
      } else {
	  #LaTeX successfully parsed tex file 
	  $name_file =~ s/\.tex/\.dvi/;
	  my $new_name_file = $name_file;
	  $new_name_file =~ s/\.dvi/\.ps/;
	  my $comma = "dvips -Ppdf -G0 -o $new_name_file";
	  system("$comma $name_file 1>/dev/null 2>/dev/null");
	  if (-e $new_name_file) {
	      print "<h1>Successfully created PDF output file (see link below)</h1>\n";
	      $new_name_file =~ m/^(.*)\./;
	      my $tempo_file = $1.'temporar.ps';
	      my $name_file = $1.'.pdf';
	      if ($laystyle eq 'album' and $numberofcolumns eq '2') {
		  $comma = "psnup -2 -s1.0 $new_name_file";
		  system("$comma $tempo_file 1>/dev/null 2>/dev/null"); 
		  system("ps2pdf $tempo_file $name_file 1>/dev/null 2>/dev/null");
	      } elsif ($laystyle eq 'book' and $numberofcolumns eq '2') {
		  $comma = 'pstops -pletter "2:0+1(0.48w,0)"';
		  system("$comma $new_name_file $tempo_file 1>/dev/null 2>/dev/null");
		  system("ps2pdf $tempo_file $name_file 1>/dev/null 2>/dev/null");
	      } else {
		  system("ps2pdf $new_name_file $name_file 1>/dev/null 2>/dev/null");
	      }	    
	      my $texlog = $texfile;
	      my $texaux = $texfile;
	      my $texdvi = $texfile;
	      my $texps = $texfile;
	      $texlog =~ s/\.tex/\.log/;
	      $texaux =~ s/\.tex/\.aux/;
	      $texdvi =~ s/\.tex/\.dvi/;
	      $texps =~ s/\.tex/\.ps/;
	      my @garb = ($texlog,$texaux,$texdvi,$texps);
#	  unlink @garb;
	      unlink $duefile;
	      print "<a href=\"/prtspool/$name_file\">Your PDF document</a>";
	      print "\n";
	  }
      }
  } else {
      print "LaTeX file $texfile was not created successfully";
  }


  





