--- loncom/homework/response.pm	2004/12/23 22:53:41	1.112
+++ loncom/homework/response.pm	2005/04/07 06:56:22	1.120
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # various response type definitons response definition
 #
-# $Id: response.pm,v 1.112 2004/12/23 22:53:41 albertel Exp $
+# $Id: response.pm,v 1.120 2005/04/07 06:56:22 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -29,6 +29,7 @@
 package Apache::response;
 use strict;
 use Apache::lonlocal;
+use Apache::lonnet;
 
 BEGIN {
     &Apache::lonxml::register('Apache::response',('responseparam','parameter','dataresponse'));
@@ -110,6 +111,7 @@ sub poprandomnumber {
 	&Apache::lonxml::error("Unable to restore random algorithm.");
     }
 }
+
 sub setrandomnumber {
     my $rndseed;
     $rndseed=&Apache::structuretags::setup_rndseed();
@@ -118,22 +120,34 @@ sub setrandomnumber {
     #  $rndseed=unpack("%32i",$rndseed);
     my $rand_alg=&Apache::lonnet::get_rand_alg();
     my $rndmod;
-    if (!$rand_alg || $rand_alg eq '32bit' || $rand_alg eq '64bit' ||
-	$rand_alg eq '64bit2') {
-	$rndmod=(&Apache::lonnet::numval($Apache::inputtags::part) << 10);
+
+    my ($id1,$id2,$shift_amt);
+    if ($Apache::lonhomework::parsing_a_problem) {
+	$id1=$Apache::inputtags::part;
 	if (defined($Apache::inputtags::response[-1])) {
-	    $rndmod+=&Apache::lonnet::numval($Apache::inputtags::response[-1]);
+	    $id2=$Apache::inputtags::response[-1];
 	}
+	$shift_amt=scalar(@Apache::inputtags::responselist);
+    } elsif ($Apache::lonhomework::parsing_a_task) {
+	$id1=$Apache::bridgetask::dimension;
+	if (defined($Apache::bridgetask::instance[-1])) {
+	    $id2=$Apache::bridgetask::instance[-1];
+	}
+	$shift_amt=scalar(@Apache::bridgetask::instance);
+    } 
+    &Apache::lonxml::debug("id1: $id1, id2: $id2, shift_amt: $shift_amt");
+    if (!$rand_alg || $rand_alg eq '32bit' || $rand_alg eq '64bit' ||
+	$rand_alg eq '64bit2') {
+	$rndmod=(&Apache::lonnet::numval($id1) << 10);
+	if (defined($id2)) { $rndmod+=&Apache::lonnet::numval($id2); }
     } elsif ($rand_alg eq '64bit3') {
-	$rndmod=(&Apache::lonnet::numval2($Apache::inputtags::part) << 10);
-	if (defined($Apache::inputtags::response[-1])) {
-	    $rndmod+=&Apache::lonnet::numval2($Apache::inputtags::response[-1]);
-	}
+	$rndmod=(&Apache::lonnet::numval2($id1) << 10);
+	if (defined($id2)) { $rndmod+=&Apache::lonnet::numval2($id2); }
     } else {
-	my $shift=(4*scalar(@Apache::inputtags::responselist))%30;
-	$rndmod=(&Apache::lonnet::numval3($Apache::inputtags::part) << (($shift+15)%30));
-	if (defined($Apache::inputtags::response[-1])) {
-	    $rndmod+=(&Apache::lonnet::numval3($Apache::inputtags::response[-1]) << $shift );
+	my $shift=(4*$shift_amt)%30;
+	$rndmod=(&Apache::lonnet::numval3($id1) << (($shift+15)%30));
+	if (defined($id2)) {
+	    $rndmod+=(&Apache::lonnet::numval3($id2) << $shift );
 	}
     }
     if ($rndseed =~/([,:])/) {
@@ -290,7 +304,7 @@ sub handle_previous {
 sub view_or_modify {
     my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
     my $myself=0;
-    if ( ($name eq $ENV{'user.name'}) && ($domain eq $ENV{'user.domain'}) ) {
+    if ( ($name eq $env{'user.name'}) && ($domain eq $env{'user.domain'}) ) {
 	$myself=1;
     }
     my $vgr=&Apache::lonnet::allowed('vgr',$courseid);
@@ -321,14 +335,14 @@ sub end_dataresponse {
     my $result;
     if ( $target eq 'web' ) {
     } elsif ($target eq 'grade' ) {
-	if ( defined $ENV{'form.submitted'}) {
+	if ( defined $env{'form.submitted'}) {
 	    my ($symb,$courseid,$domain,$name)=&Apache::lonxml::whichuser();
 	    my $allowed=&Apache::lonnet::allowed('mgr',$courseid);
 	    if ($allowed) {
 		&Apache::response::setup_params('dataresponse',$safeeval);
 		my $partid = $Apache::inputtags::part;
 		my $id = $Apache::inputtags::response['-1'];
-		my $response = $ENV{'form.HWVAL_'.$id};
+		my $response = $env{'form.HWVAL_'.$id};
 		my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
 		if ( $response =~ /[^\s]/) {
 		    $Apache::lonhomework::results{"resource.$partid.$id.$name"}=$response;
@@ -396,8 +410,8 @@ sub start_responseparam {
 						     $safeeval,'name','type',
 						     'description','default');
 	my $element=&Apache::edit::html_element_name('parameter_package');
-	if (defined($ENV{"form.$element"}) && $ENV{"form.$element"} ne '') {
-	    my $name=$ENV{"form.$element"};
+	if (defined($env{"form.$element"}) && $env{"form.$element"} ne '') {
+	    my $name=$env{"form.$element"};
 	    my $tag=&decide_package($tagstack);
 	    $token->[2]->{'name'}=$name;
 	    $token->[2]->{'type'}=
@@ -414,7 +428,7 @@ sub start_responseparam {
 	}
     } elsif ($target eq 'grade' || $target eq 'answer' || $target eq 'web' ||
 	     $target eq 'tex' || $target eq 'analyze' ) {
-	if ($ENV{'request.state'} eq 'construct') {
+	if ($env{'request.state'} eq 'construct') {
 	    my $name   =&Apache::lonxml::get_param('name',$parstack,$safeeval);
 	    my $default=&Apache::lonxml::get_param('default',$parstack,
 						     $safeeval);
@@ -431,13 +445,11 @@ sub end_responseparam {
 }
 
 sub start_parameter {
-    my $result = &start_responseparam(@_);
-    return $result;
+    return &start_responseparam(@_);
 }
 
 sub end_parameter {
-    my $result = &end_responseparam(@_);
-    return $result;
+    return &end_responseparam(@_);
 }
 
 sub reset_params {
@@ -447,7 +459,7 @@ sub reset_params {
 sub setup_params {
     my ($tag,$safeeval) = @_;
 
-    if ($ENV{'request.state'} eq 'construct') { return; }
+    if ($env{'request.state'} eq 'construct') { return; }
     my %paramlist=();
     foreach my $key (keys(%Apache::lonnet::packagetab)) {
 	if ($key =~ /^$tag/) {
@@ -479,7 +491,7 @@ sub setup_params {
 sub answer_header {
     my ($type) = @_;
     my $result;
-    if ($ENV{'form.answer_output_mode'} eq 'tex') {
+    if ($env{'form.answer_output_mode'} eq 'tex') {
 	$result = ' \vskip 0 mm \begin{tabular}{|c|}\hline Answer for Part: \verb|'.
                   $Apache::inputtags::part.'| \\\\ \hline ';
     } else {
@@ -492,7 +504,7 @@ sub answer_header {
 sub answer_part {
     my ($type,$answer) = @_;
     my $result;
-    if ($ENV{'form.answer_output_mode'} eq 'tex') {
+    if ($env{'form.answer_output_mode'} eq 'tex') {
 	$result = ' \verb|'.$answer.'|\\\\ \hline ';
     } else {
 	$result = '<td>'.$answer.'</td>';
@@ -503,7 +515,7 @@ sub answer_part {
 sub answer_footer {
     my ($type) = @_;
     my $result;
-    if ($ENV{'form.answer_output_mode'} eq 'tex') {
+    if ($env{'form.answer_output_mode'} eq 'tex') {
 	$result = ' \end{tabular} \vskip 0 mm ';
     } else {
 	$result = '</tr></table>';
@@ -512,10 +524,11 @@ sub answer_footer {
 }
 
 sub showallfoils {
-    if (defined($ENV{'form.showallfoils'})) {
+    if (defined($env{'form.showallfoils'})) {
 	my ($symb)=&Apache::lonxml::whichuser();
-	if ($ENV{'request.state'} eq 'construct' || 
-	    ($ENV{'user.adv'} && $symb eq '')) {
+	if (($env{'request.state'} eq 'construct') || 
+	    ($env{'user.adv'} && $symb eq '')      ||
+            ($Apache::lonhomework::viewgrades) ) {
 	    return 1;
 	}
     }
@@ -536,10 +549,10 @@ sub getresponse {
 		    'I'=>8,'J'=>9,'K'=>10,'L'=>11,'M'=>12,'N'=>13,'O'=>14,
 		    'P'=>15,'Q'=>16,'R'=>17,'S'=>18,'T'=>19,'U'=>20,'V'=>21,
 		    'W'=>22,'X'=>23,'Y'=>24,'Z'=>25);
-    if ($ENV{'form.submitted'} eq 'scantron') {
+    if ($env{'form.submitted'} eq 'scantron') {
 	my $part  = $Apache::inputtags::part;
 	my $id    = $Apache::inputtags::response[-1];
-	$response = $ENV{'scantron.'.($Apache::lonxml::counter+$temp-1).
+	$response = $env{'scantron.'.($Apache::lonxml::counter+$temp-1).
 			 '.answer'};
 	# save bubbled letter for later
 	$Apache::lonhomework::results{"resource.$part.$id.scantron"}.=
@@ -552,7 +565,7 @@ sub getresponse {
 	    }
 	}
     } else {
-	$response = $ENV{$formparm};
+	$response = $env{$formparm};
     }
     return $response;
 }
@@ -703,7 +716,7 @@ sub pick_foil_for_concept {
 sub get_response_param {
     my ($id,$name,$default)=@_;
     my $parameter;
-    if ($ENV{'request.state'} eq 'construct' &&
+    if ($env{'request.state'} eq 'construct' &&
 	defined($Apache::inputtags::params{$name})) {
 	$parameter=$Apache::inputtags::params{$name};
     } else {
@@ -715,6 +728,50 @@ sub get_response_param {
     return $parameter;
 }
 
+sub submitted {
+    my ($who)=@_;
+    
+    # when scatron grading any submission is a submission
+    if ($env{'form.submitted'} eq 'scantron') { return 1; }
+    # if the caller only cared if this was a scantron submission
+    if ($who eq 'scantron') { return 0; }
+    # if the Submit Answer button for this particular part was pressed
+    my $partid=$Apache::inputtags::part;
+    if (defined($env{'form.submit_'.$partid})) { return 1; }
+    # otherwise no submission occured
+    return 0;
+}
+
+# basically undef and 0 (both false) mean that they still have work to do
+# and all true values mean that they can't do any more work
+#
+# a return of undef means it is unattempted
+# a return of 0 means it is attmpted and wrong but still has tries
+# a return of 1 means it is marked correct
+# a return of 2 means they have exceed maximum number of tries
+# a return of 3 means it after the answer date
+sub check_status {
+    my ($id)=@_;
+    if (!$id) {	$id=$Apache::linputtags::part; }
+    my $curtime=&Apache::lonnet::EXT('system.time');
+    my $opendate=&Apache::lonnet::EXT("resource.$id.opendate");
+    my $duedate=&Apache::lonnet::EXT("resource.$id.duedate");
+    my $answerdate=&Apache::lonnet::EXT("resource.$id.answerdate");
+    if ( $opendate && $curtime > $opendate &&
+         $duedate && $curtime > $duedate &&
+         $answerdate && $curtime > $answerdate) {
+        return 3;
+    }
+    my $status=&Apache::lonnet::EXT("user.resource.resource.$id.solved");
+    if ($status =~ /^correct/) { return 1; }
+    if (!$status) { return undef; }
+    my $maxtries=&Apache::lonnet::EXT("resource.$id.maxtries");
+    if ($maxtries eq '') { $maxtries=2; }
+    my $curtries=&Apache::lonnet::EXT("user.resource.resource.$id.tries");
+    if ($curtries < $maxtries) { return 0; }
+    return 2;
+}
+
 1;
 __END__