1: # The LON-CAPA Homework handler
2: # Guy Albertelli
3: # 11/30 Gerd Kortemeyer
4:
5: package Apache::lonhomework;
6: use strict;
7: use Apache::style;
8: use Apache::lonxml;
9: use Apache::lonnet;
10: use Apache::inputtags;
11: use Apache::structuretags;
12: use Apache::response;
13:
14:
15: sub get_target {
16: if ( $ENV{'request.state'} eq "published") {
17: if ( defined $ENV{'form.submit'}) {
18: return ('grade', 'web');
19: } else {
20: return ('web');
21: }
22: } elsif ($ENV{'request.state'} eq "construct") {
23: if ( defined $ENV{'form.preview'}) {
24: if ( defined $ENV{'form.submit'}) {
25: return ('grade', 'web');
26: } else {
27: return ('web');
28: }
29: } else {
30: return ('edit');
31: }
32: }
33: return ();
34: }
35:
36: sub setup_vars {
37: my ($target) = @_;
38: return ';'
39: # return ';$external::target='.$target.';';
40: }
41:
42: sub send_header {
43: my ($request)= @_;
44: $request->print(&Apache::lontexconvert::header());
45: $ENV{'request.uri'}=$request->uri;
46: # $request->print('<form name='.$ENV{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');
47: }
48:
49: sub send_footer {
50: my ($request)= @_;
51: # $request->print('</form>');
52: $request->print(&Apache::lontexconvert::footer());
53: }
54:
55: sub handler {
56: my $request=$_[0];
57:
58: # if ( $ENV{'user.name'} eq 'albertel' ) { $Apache::lonxml::debug=1; }
59:
60: my (@targets) = &get_target();
61:
62: if ($ENV{'browser.mathml'}) {
63: $request->content_type('text/xml');
64: } else {
65: $request->content_type('text/html');
66: }
67: $request->send_http_header;
68: return 'OK' if $request->header_only;
69:
70: &Apache::lonhomework::send_header($request);
71:
72: foreach my $target (@targets) {
73: my $file=&Apache::lonnet::filelocation("",$request->uri);
74: my $problem=&Apache::lonnet::getfile($file);
75: if ($problem == -1) {
76: &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");
77: $problem='';
78: }
79:
80: my %mystyle;
81: my $result = '';
82: &Apache::inputtags::initialize_inputtags;
83: %Apache::lonhomework::results=();
84: %Apache::lonhomework::history=&Apache::lonnet::restore;
85: #ignore error conditions
86: my ($temp)=keys %Apache::lonhomework::history ;
87: if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
88:
89: if ($target eq 'grade') {
90: my $resultkey;
91: foreach $resultkey (sort keys %Apache::lonhomework::history) {
92: &Apache::lonxml::debug("$resultkey ---- $Apache::lonhomework::history{$resultkey}");
93: }
94: &Apache::lonxml::debug("\n<br>restored values^</br>\n");
95: }
96: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
97: if ($default == -1) {
98: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
99: $default='';
100: }
101: if ( $target eq 'grade') {
102: $Apache::lonxml::textredirection = 0;
103: } else {
104: $Apache::lonxml::textredirection = 1;
105: }
106: $result = &Apache::lonxml::xmlparse($target, $problem,
107: $default.&setup_vars($target),%mystyle);
108:
109: #$request->print("Result follows:");
110: $request->print($result);
111: #$request->print(":Result ends");
112: if ($target eq 'grade') {
113: my $resultkey;
114: foreach $resultkey (sort keys %Apache::lonhomework::results) {
115: &Apache::lonxml::debug("$resultkey ---- $Apache::lonhomework::results{$resultkey}");
116: }
117: &Apache::lonxml::debug("\n<br>storing values^</br>\n");
118: }
119:
120: my ($temp) = keys %Apache::lonhomework::results;
121: if ( $temp ne '' ) {
122: &Apache::lonxml::debug("Store return message:".&Apache::lonnet::cstore(%Apache::lonhomework::results));
123: }
124: }
125: &Apache::lonhomework::send_footer($request);
126:
127: return 'OK';
128:
129: }
130:
131: 1;
132: __END__
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