1: # The LearningOnline Network with CAPA # <script> definiton
2:
3: package Apache::structuretags;
4:
5: use strict;
6: use Apache::lonnet;
7:
8: sub BEGIN {
9: &Apache::lonxml::register('Apache::structuretags',('block','while','randomlist','problem','web','tex','part','pre_duedate','post_answerdate','solved','not_solved'));
10: }
11:
12: sub start_web {
13: my ($target,$token,$parstack,$parser,$safeeval)=@_;
14: my $bodytext=&Apache::lonxml::get_all_text("/web",$$parser[$#$parser]);
15: if ($target eq 'web') {
16: return $bodytext;
17: }
18: return '';
19: }
20:
21: sub end_web {
22: }
23:
24: sub start_tex {
25: my ($target,$token,$parstack,$parser,$safeeval)=@_;
26: my $bodytext=&Apache::lonxml::get_all_text("/tex",$$parser[$#$parser]);
27: if ($target eq 'tex') {
28: return $bodytext
29: }
30: return '';
31: }
32:
33: sub end_tex {
34: }
35:
36: sub start_problem {
37: my ($target,$token,$parstack,$parser,$safeeval)=@_;
38:
39: #intialize globals
40: $Apache::inputtags::part='0';
41: @Apache::inputtags::responselist = ();
42:
43: #adeed vars to the scripting enviroment
44: my $expression='$external::part='.$Apache::inputtags::part.';';
45: &Apache::run::run($expression,$safeeval);
46: my $status;
47: my $datemsg;
48: if ($target ne 'meta') {
49: ($status,$datemsg) = &Apache::lonhomework::check_date('0');
50: push (@Apache::inputtags::status,$status);
51: my $expression='$external::datestatus="'.$status.'";';
52: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
53: &Apache::run::run($expression,$safeeval);
54: if ( $status eq 'CLOSED' ) {
55: my $bodytext=&Apache::lonxml::get_all_text("/problem",$$parser[$#$parser]);
56: if ( $target eq "web" ) {
57: return "<br></br>Problem is not open to be viewed. The problem $datemsg<br></br>";
58: }
59: }
60: }
61: if ($target eq 'web') {
62: my $args ='';
63: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
64: my $name = &Apache::run::run("{$args;".'return $name}',$safeeval);
65: if ($status eq 'CAN_ANSWER') {
66: # create a page header and exit
67: return "<title>$name</title>\n<body bgcolor=#FFFFFF>\n<form name=\"lonhomework\" method=\"POST\" action=\"".$ENV{'request.uri'}."\">";
68: } elsif ($status eq 'SHOW_ANSWER') {
69: return "<title>$name</title>\n<body bgcolor=#FFFFFF>\n";
70: }
71: }
72: return '';
73: }
74:
75: sub end_problem {
76: my ($target,$token,$parstack,$parser,$safeeval)=@_;
77: my $result='';
78: my $status=$Apache::inputtags::status['-1'];
79: unless ($target eq 'meta') {
80: if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
81: # if part is zero, no <part>s existed, so we need to the grading
82: &Apache::inputtags::grade;
83: } elsif ($Apache::inputtags::part eq '0') {
84: # if part is zero, no <part>s existed, so we need show the current
85: # grading status
86: $result.= &Apache::inputtags::gradestatus($Apache::inputtags::part);
87: }
88: if ($target eq 'web') {
89: if ($status eq 'CAN_ANSWER') {
90: $result.="</form></body>\n";
91: } elsif ($status eq 'SHOW_ANSWER') {
92: $result.="</body>\n";
93: }
94: }
95: } else {
96: if ($Apache::inputtags::part eq '0') {
97: $result=&Apache::response::mandatory_part_meta;
98: }
99: }
100: return $result;
101: }
102:
103: sub start_block {
104: my ($target,$token,$parstack,$parser,$safeeval)=@_;
105:
106: my $code = @$parstack[$#$parstack];
107: $code =~ s/\"//g;
108: $code .=';return $condition;';
109: # print "<br>$code<br>";
110: my $result = &Apache::run::run($code,$safeeval);
111: &Apache::lonxml::debug("block :$code: returned :$result:");
112: if ( ! $result ) {
113: my $skip=&Apache::lonxml::get_all_text("/block",$$parser[$#$parser]);
114: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[$#$parser]");
115: }
116: return "";
117: }
118:
119: sub end_block {
120: }
121:
122: sub start_while {
123: my ($target,$token,$parstack,$parser,$safeeval)=@_;
124:
125: my $code = @$parstack[$#$parstack];
126: $code =~ s/\"//g;
127: $code .=';return $condition;';
128:
129: push( @Apache::structuretags::whileconds, $code);
130: my $result = &Apache::run::run($code,$safeeval);
131: my $bodytext=$$parser[$#$parser]->get_text("/while");
132: push( @Apache::structuretags::whilebody, $bodytext);
133: if ( $result ) {
134: &Apache::lonxml::newparser($parser,\$bodytext);
135: }
136: return "";
137: }
138:
139: sub end_while {
140: my ($target,$token,$parstack,$parser,$safeeval)=@_;
141: my $code = pop @Apache::structuretags::whileconds;
142: my $bodytext = pop @Apache::structuretags::whilebody;
143: my $result = &Apache::run::run($code,$safeeval);
144: if ( $result ) {
145: &Apache::lonxml::newparser($parser,\$bodytext);
146: }
147: return "";
148: }
149:
150: # <randomlist>
151: # <tag1>..</tag1>
152: # <tag2>..</tag2>
153: # <tag3>..</tag3>
154: # ...
155: # </randomlist>
156: sub start_randomlist {
157: my ($target,$token,$parstack,$parser,$safeeval)=@_;
158: my $body= &Apache::lonxml::get_all_text("/randomlist",$$parser[$#$parser]);
159: my $b_parser= HTML::TokeParser->new(\$body);
160: my $b_tok;
161: my @randomlist;
162: my $list_item;
163:
164: while($b_tok = $b_parser->get_token() ) {
165: if($b_tok->[0] eq 'S') { # start tag
166: # get content of the tag until matching end tag
167: # get all text upto the matching tag
168: # and push the content into @randomlist
169: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],$b_parser);
170: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
171: push(@randomlist,$list_item);
172: # print "<BR><B>START-TAG $b_tok->[1], $b_tok->[4], $list_item</B>";
173: }
174: if($b_tok->[0] eq 'T') { # text
175: # what to do with text in between tags?
176: # print "<B>TEXT $b_tok->[1]</B><BR>";
177: }
178: # if($b_tok->[0] eq 'E') { # end tag, should not happen
179: # print "<B>END-TAG $b_tok->[1]</B><BR>";
180: # }
181: }
182: my @idx_arr = (0 .. $#randomlist);
183: &Apache::structuretags::shuffle(\@idx_arr);
184: my $bodytext = '';
185: for(0 .. $#randomlist) {
186: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
187: }
188:
189: &Apache::lonxml::newparser($parser,\$bodytext);
190: return "";
191: }
192:
193: sub shuffle {
194: my $a=shift;
195: my $i;
196: for($i=@$a;--$i;) {
197: my $j=int rand($i+1);
198: next if $i == $j;
199: @$a[$i,$j] = @$a[$j,$i];
200: }
201: }
202:
203: sub end_randomlist {
204: }
205:
206: sub start_part {
207: my ($target,$token,$parstack,$parser,$safeeval)=@_;
208: my $args ='';
209: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
210: my $id = &Apache::run::run("{$args;".'return $id}',$safeeval);
211: $Apache::inputtags::part=$id;
212: @Apache::inputtags::responselist = ();
213: if ($target eq 'meta') {
214: return &Apache::response::mandatory_part_meta;
215: } else {
216: my ($status,$datemsg) = &Apache::lonhomework::check_date("OPEN_DATE",$id);
217: push (@Apache::inputtags::status,$status);
218: my $expression='$external::datestatus="'.$status.'";';
219: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
220: &Apache::run::run($expression,$safeeval);
221: if ( $status eq 'CLOSED' ) {
222: my $bodytext=&Apache::lonxml::get_all_text("/part",$$parser[$#$parser]);
223: if ( $target eq "web" ) {
224: return "<br></br>Part is not open to be viewed. It $datemsg<br></br>";
225: }
226: }
227: }
228: return '';
229: }
230:
231: sub end_part {
232: my ($target,$token,$parstack,$parser,$safeeval)=@_;
233: &Apache::lonxml::debug("in end_part $target ");
234: pop @Apache::inputtags::status;
235: if ( $target eq 'meta' ) { return ''; }
236: if ( $target eq 'grade' ) { return &Apache::inputtags::grade; }
237: return &Apache::inputtags::gradestatus($Apache::inputtags::part);
238: }
239:
240: sub start_pre_duedate {
241: my ($target,$token,$parstack,$parser,$safeeval)=@_;
242: if ($target ne 'meta') {
243: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER') {
244: &Apache::lonxml::get_all_text("/pre_duedate",$$parser[$#$parser]);
245: }
246: }
247: return '';
248: }
249:
250: sub end_pre_duedate {
251: return '';
252: }
253:
254: sub start_post_answerdate {
255: my ($target,$token,$parstack,$parser,$safeeval)=@_;
256: if ($target ne 'meta') {
257: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
258: &Apache::lonxml::get_all_text("/post_answerdate",$$parser[$#$parser]);
259: }
260: }
261: return '';
262: }
263:
264: sub end_post_answerdate {
265: return '';
266: }
267:
268: sub start_not_solved {
269: my ($target,$token,$parstack,$parser,$safeeval)=@_;
270: if ($target ne 'meta') {
271: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
272: &Apache::lonxml::debug("not solved has :$gradestatus:");
273: if ($gradestatus =~ /^correct/) {
274: &Apache::lonxml::debug("skipping");
275: &Apache::lonxml::get_all_text("/not_solved",$$parser[$#$parser]);
276: }
277: }
278: return '';
279: }
280:
281: sub end_not_solved {
282: return '';
283: }
284:
285: sub start_solved {
286: my ($target,$token,$parstack,$parser,$safeeval)=@_;
287: if ($target ne 'meta') {
288: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
289: if ($gradestatus !~ /^correct/) {
290: &Apache::lonxml::get_all_text("/solved",$$parser[$#$parser]);
291: }
292: }
293: return '';
294: }
295:
296: sub end_solved {
297: return '';
298: }
299: 1;
300: __END__
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