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# The LearningOnline Network with CAPA
# image click response style
#
# $Id: imageresponse.pm,v 1.30 2003/06/09 22:31:56 albertel Exp $
#
# Copyright Michigan State University Board of Trustees
#
# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
#
# LON-CAPA is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# LON-CAPA is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with LON-CAPA; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
# /home/httpd/html/adm/gpl.txt
#
# http://www.lon-capa.org/
#

#FIXME LATER assumes multiple possible submissions but only one is possible 
#currently

package Apache::imageresponse;
use strict;
use Image::Magick;

BEGIN {
  &Apache::lonxml::register('Apache::imageresponse',('imageresponse'));
}

sub start_imageresponse {
  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  my $result;
  #when in a radiobutton response use these
  &Apache::lonxml::register('Apache::imageresponse',('foilgroup','foil','text','image','rectangle','conceptgroup'));
  push (@Apache::lonxml::namespace,'imageresponse');
  my $id = &Apache::response::start_response($parstack,$safeeval);
  if ($target eq 'meta') {
    $result=&Apache::response::meta_package_write('imageresponse');
  }
  return $result;
}

sub end_imageresponse {
    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
    &Apache::response::end_response;
    pop @Apache::lonxml::namespace;
    &Apache::lonxml::deregister('Apache::imageresponse',('foilgroup','foil','text','image','rectangle','conceptgroup'));
    my $result;
    if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
    return $result;
}

%Apache::response::foilgroup=();
sub start_foilgroup {
  %Apache::response::foilgroup=();
  $Apache::imageresponse::conceptgroup=0;
  &Apache::response::setrandomnumber();
  return '';
}

sub getfoilcounts {
  my ($parstack,$safeeval)=@_;

  my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');
  # +1 since instructors will count from 1
  my $count = $#{ $Apache::response::foilgroup{'names'} }+1;
  if (&Apache::response::showallfoils()) { $max=$count; }
  return ($count,$max);
}

sub whichfoils {
  my ($max)=@_;
  if (!defined(@{ $Apache::response::foilgroup{'names'} })) { return; }
  my @names = @{ $Apache::response::foilgroup{'names'} };
  my @whichopt =();
  while ((($#whichopt+1) < $max) && ($#names > -1)) {
    &Apache::lonxml::debug("Have $#whichopt max is $max");
    my $aopt;
    if (&Apache::response::showallfoils()) {
      $aopt=0;
    } else {
      $aopt=int(&Math::Random::random_uniform() * ($#names+1));
    }
    &Apache::lonxml::debug("From $#names elms, picking $aopt");
    $aopt=splice(@names,$aopt,1);
    &Apache::lonxml::debug("Picked $aopt");
    push (@whichopt,$aopt);
  }
  return @whichopt;
}

sub displayfoils {
  my ($target,@whichopt) = @_;
  my $result ='';
  my $name;
  my $temp=1;
  foreach $name (@whichopt) {
    $result.=$Apache::response::foilgroup{"$name.text"};
    &Apache::lonxml::debug("Text is $result");
    if ($target eq 'tex') {$result.="\\vskip 0 mm \n";} else {$result.="<br />\n";}
    my $image=$Apache::response::foilgroup{"$name.image"};
    &Apache::lonxml::debug("image is $image");
    if ($Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"} =~ /^correct/ ) {
      if ($target eq 'tex') {
	$result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
      } else {
        $result.="<img src=\"$image\"/> <br />\n";
      }
    } else {
      if ($target eq 'tex') {
	$result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
      } else {
        $result.="<input type=\"image\" name=\"HWVAL_$Apache::inputtags::response['-1']:$temp\" src=\"$image\"/> <br />\n";
      }
    }
    $temp++;
  }
  return $result;
}

sub gradefoils {
  my (@whichopt) = @_;
  my $x;
  my $y;
  my $result;
  my $id=$Apache::inputtags::response['-1'];
  my $temp=1;
  foreach my $name (@whichopt) {
    $x=$ENV{"form.HWVAL_$id:$temp.x"};
    $y=$ENV{"form.HWVAL_$id:$temp.y"};
    &Apache::lonxml::debug("Got a x of $x and a y of $y for $name");
    if (defined($x) && defined($y) &&
	defined(@{ $Apache::response::foilgroup{"$name.area"} })) {
      my @areas = @{ $Apache::response::foilgroup{"$name.area"} };
      my $grade="INCORRECT";
      foreach my $area (@areas) {
	&Apache::lonxml::debug("Area is $area for $name");
	$area =~ m/([a-z]*):/;
	&Apache::lonxml::debug("Area of type $1");
	if ($1 eq 'rectangle') {
	  $grade=&grade_rectangle($area,$x,$y);
	} else {
	  &Apache::lonxml::error("Unknown area style $area");
	}
	&Apache::lonxml::debug("Area said $grade");
	if ($grade eq 'APPROX_ANS') { last; }
      }
      &Apache::lonxml::debug("Foil was $grade");
      if ($grade eq 'INCORRECT') { $result= 'INCORRECT'; }
      if (($grade eq 'APPROX_ANS') && ($result ne 'APPROX_ANS')) { $result=$grade; }
      &Apache::lonxml::debug("Question is $result");
      $temp++;
    }
  }
  $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.submission"}="$x:$y";
  $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.awarddetail"}=$result;
  return '';
}

sub end_foilgroup {
  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  my $result='';
  my @whichopt;
  if ($target eq 'web' || $target eq 'grade' || $target eq 'tex') {
    my ($count,$max) = &getfoilcounts($parstack,$safeeval);
    if ($count>$max) { $count=$max }
    &Apache::lonxml::debug("Count is $count from $max");
    @whichopt = &whichfoils($max);
    if ($target eq 'web' || $target eq 'tex') {
	$result=&displayfoils($target,@whichopt);
    } elsif ($target eq 'grade') {
	if ( defined $ENV{'form.submitted'}) { &gradefoils(@whichopt); }
    } 
  } elsif ($target eq 'edit') {
      $result=&Apache::edit::end_table();
  }
  return $result;
}

sub start_conceptgroup {
  $Apache::imageresponse::conceptgroup=1;
  %Apache::response::conceptgroup=();
  return '';
}

sub end_conceptgroup {
  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  $Apache::imageresponse::conceptgroup=0;
  my $result;
  if ($target eq 'web' || $target eq 'grade' || $target eq 'tex') {
    if (defined(@{ $Apache::response::conceptgroup{'names'} })) {
      my @names = @{ $Apache::response::conceptgroup{'names'} };
      my $pick=int(&Math::Random::random_uniform() * ($#names+1));
      my $name=$names[$pick];
      if (defined(@{ $Apache::response::conceptgroup{"$name.area"} })) {
	push @{ $Apache::response::foilgroup{'names'} }, $name;
	$Apache::response::foilgroup{"$name.text"} = $Apache::response::conceptgroup{"$name.text"};
	$Apache::response::foilgroup{"$name.image"} = $Apache::response::conceptgroup{"$name.image"};
	push(@{ $Apache::response::foilgroup{"$name.area"} }, @{ $Apache::response::conceptgroup{"$name.area"} });
	my $concept = &Apache::lonxml::get_param('concept',$parstack,$safeeval);
	$Apache::response::foilgroup{"$name.concept"} = $concept;
	&Apache::lonxml::debug("Selecting $name in $concept");
      }
    }
  } elsif ($target eq 'edit') {
      $result=&Apache::edit::end_table();
  }
  return $result;
}

$Apache::imageresponse::curname='';
sub start_foil {
  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  if ($target eq 'web' || $target eq 'grade' || $target eq 'tex') {
    my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
    if ($name eq '') { $name=$Apache::lonxml::curdepth; }
    if ( $Apache::imageresponse::conceptgroup
	 && !&Apache::response::showallfoils()) {
      push(@{ $Apache::response::conceptgroup{'names'} }, $name);
    } else {
      push(@{ $Apache::response::foilgroup{'names'} }, $name);
    }
    $Apache::imageresponse::curname=$name;
  }
  return '';
}

sub end_foil {
    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
    my $result;
    if ($target eq 'edit') {
	$result=&Apache::edit::end_table();
    }
    return $result;
}

sub start_text {
  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  my $result='';
  if ($target eq 'web' || $target eq 'tex') { 
     &Apache::lonxml::startredirection; 
  } elsif ($target eq 'edit') {
    my $descr=&Apache::lonxml::get_all_text('/text',$parser);
    $result=&Apache::edit::tag_start($target,$token,'Task Description').
	&Apache::edit::editfield($token->[1],$descr,'Text',60,2).
        &Apache::edit::end_row();
  } elsif ($target eq "modified") {
    my $descr=&Apache::lonxml::get_all_text('/text',$parser);
    $result=$token->[4].&Apache::edit::modifiedfield($token);
    &Apache::lonxml::debug($result);
  }
  return $result;
}

sub end_text {
  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  my $result;
  if ($target eq 'web' || $target eq 'tex') {
    my $name = $Apache::imageresponse::curname;
    if ( $Apache::imageresponse::conceptgroup
       && !&Apache::response::showallfoils() ) {
      $Apache::response::conceptgroup{"$name.text"} = &Apache::lonxml::endredirection;
    } else {
      $Apache::response::foilgroup{"$name.text"} = &Apache::lonxml::endredirection;
    }
  } elsif ($target eq 'edit') {
      $result=&Apache::edit::end_table();
  }
  return $result;
}

sub start_image {
  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  my $result='';
  if ($target eq 'web' || $target eq 'tex') { 
      &Apache::lonxml::startredirection; 
  } elsif ($target eq 'edit') {
    my $bgimg=&Apache::lonxml::get_all_text('/image',$parser);
    $Apache::edit::bgimgsrc=$bgimg;
    $Apache::edit::bgimgsrcdepth=$Apache::lonxml::curdepth;

    $result=&Apache::edit::tag_start($target,$token,'Clickable Image').
	&Apache::edit::editline($token->[1],$bgimg,'Image Source File',40);
    $result.=&Apache::edit::browse(undef,'textnode').' ';
    $result.=&Apache::edit::search(undef,'textnode').
        &Apache::edit::end_row();
  } elsif ($target eq "modified") {
    my $bgimg=&Apache::lonxml::get_all_text('/image',$parser);
    $result=$token->[4].&Apache::edit::modifiedfield($token);
    &Apache::lonxml::debug($result);
  }
  return $result;
}

sub end_image {
  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  my $result;
  my $name = $Apache::imageresponse::curname;
  if ($target eq 'web') {
    my $image = &Apache::lonxml::endredirection;
    &Apache::lonxml::debug("out is $image");
    if ( $Apache::imageresponse::conceptgroup
	 && !&Apache::response::showallfoils()) {
      $Apache::response::conceptgroup{"$name.image"} = $image;
    } else {
      $Apache::response::foilgroup{"$name.image"} = $image;
    }
  } elsif ($target eq 'edit') {
      $result=&Apache::edit::end_table();
  } elsif ($target eq 'tex') {
    my $src = &Apache::lonxml::endredirection;
    $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
    my $width_param = '';
    my $height_param = '';
    my $scaling = .3;
    my $image = Image::Magick->new;
    my $current_figure = $image->Read($src);
    $width_param = $image->Get('width') * $scaling;;
    $height_param = $image->Get('height') * $scaling;;
    undef $image;
    my $epssrc = $src;
    $epssrc =~ s/(\.gif|\.jpg)$/\.eps/i;
    if (not -e $epssrc) {
	my $localfile = $epssrc;
	$localfile =~ s/.*(\/res)/$1/;	
	my $file;
	my $path;	
	if ($localfile =~ m!(.*)/([^/]*)$!) {
	    $file = $2;
	    $path = $1.'/'; 
	}	
	my $signal_eps = 0;
	my @content_directory = &Apache::lonnet::dirlist($path);
	for (my $iy=0;$iy<=$#content_directory;$iy++) {
	    my @tempo_array = split(/&/,$content_directory[$iy]);
	    $content_directory[$iy] = $tempo_array[0];
	    if ($file eq $tempo_array[0]) {
		$signal_eps = 1;
		last;
	    }
	}
	if ($signal_eps) {
	    my $eps_file = &Apache::lonnet::getfile($localfile);
	} else {
	    $localfile = $src;
	    $localfile =~ s/.*(\/res)/$1/;	
	    my $as = &Apache::lonnet::getfile($src);		      
	}
    }
    my $file;
    my $path;	
    if ($src =~ m!(.*)/([^/]*)$!) {
	$file = $2;
	$path = $1.'/'; 
    }
    my $newsrc = $src;
    $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
    $file=~s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
    #do we have any specified size of the picture?
    my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval); 
    my $TeXheight = &Apache::lonxml::get_param('TeXheight',$parstack,$safeeval); 
    my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval);
    if ($TeXwidth ne '') { 
	$width_param = $TeXwidth; 
    } elsif ($TeXheight ne '') { 
	$width_param = $TeXheight/$height_param*$width_param;
    } elsif ($width ne '') {
	$width_param = $width*$scaling;      
    }
    #where can we find the picture?
    if (-e $newsrc) {
	if ($path) {
	  $Apache::response::foilgroup{"$name.image"} ='\vskip 0 mm \noindent\graphicspath{{'.$path.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
	}
    } else {
	my $temp_file;
	my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.dat";
	$temp_file = Apache::File->new('>>'.$filename); 
	print $temp_file "$src\n";
$Apache::response::foilgroup{"$name.image"} ='\vskip 0 mm \graphicspath{{/home/httpd/prtspool/}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
    }
  } 
  return $result;
}

sub start_rectangle {
  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  my $result='';
  if ($target eq 'web' || $target eq 'grade' || $target eq 'tex') { 
     &Apache::lonxml::startredirection; 
  } elsif ($target eq 'edit') {
    my $coords=&Apache::lonxml::get_all_text('/rectangle',$parser);
    $result=&Apache::edit::tag_start($target,$token,'Rectangle').
	&Apache::edit::editline($token->[1],$coords,'Coordinate Pairs',40).
        &Apache::edit::entercoordpair(undef,'textnode').
        &Apache::edit::end_row();
  } elsif ($target eq "modified") {
    my $coords=&Apache::lonxml::get_all_text('/rectangle',$parser);
    $result=$token->[4].&Apache::edit::modifiedfield($token);
    &Apache::lonxml::debug($result);
  }
  return $result;
}

sub grade_rectangle {
  my ($spec,$x,$y) = @_;
  &Apache::lonxml::debug("Spec is $spec");
  $spec=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/;
  my $x1=$1;
  my $y1=$2;
  my $x2=$3;
  my $y2=$4;
  &Apache::lonxml::debug("Point $x1,$y1,$x2,$y2");
  if ($x1 > $x2) { my $temp=$x1;$x1=$x2;$x2=$temp; }
  if ($y1 > $y2) { my $temp=$y1;$y1=$y2;$y2=$temp; }
  if (($x >= $x1) && ($x <= $x2) && ($y >= $y1) && ($y <= $y2)) {
    return 'APPROX_ANS';
  }
  return 'INCORRECT';
}

sub end_rectangle {
  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  my $result;
  if ($target eq 'web' || $target eq 'grade' || $target eq 'tex') {
    my $name = $Apache::imageresponse::curname;
    my $area = &Apache::lonxml::endredirection;
    &Apache::lonxml::debug("out is $area for $name");
    if ( $Apache::imageresponse::conceptgroup
	 && !&Apache::response::showallfoils()) {
      push @{ $Apache::response::conceptgroup{"$name.area"} },"rectangle:$area";
    } else {
      push @{ $Apache::response::foilgroup{"$name.area"} },"rectangle:$area";
    }
  } elsif ($target eq 'edit') {
      $result=&Apache::edit::end_table();
  }
  return $result;
}
1;
__END__