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','preduedate','postanswerdate','solved','notsolved'));
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",$$parser[$#$parser]);
56: if ( $target eq "web" ) {
57: return "<body bgcolor=#FFFFFF> <br></br>Problem is not open to be viewed. The problem $datemsg<br></br>";
58: }
59: }
60: }
61: if ($target eq 'web') {
62: my $args ='';
63: if ( $#$parstack > -1 ) { $args=$$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' || $status eq 'CANNOT_ANSWER' || $status eq 'CLOSED') {
69: return "<title>$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: $status eq 'CAN_ANSWER') {
82: # if part is zero, no <part>s existed, so we need to the grading
83: &Apache::inputtags::grade;
84: } elsif ($Apache::inputtags::part eq '0') {
85: # if part is zero, no <part>s existed, so we need show the current
86: # grading status
87: $result.= &Apache::inputtags::gradestatus($Apache::inputtags::part);
88: }
89: if ($target eq 'web') {
90: if ($status eq 'CAN_ANSWER') {
91: $result.="</form></body>\n";
92: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER') {
93: $result.="</body>\n";
94: }
95: }
96: } else {
97: if ($Apache::inputtags::part eq '0') {
98: $result=&Apache::response::mandatory_part_meta;
99: }
100: }
101: return $result;
102: }
103:
104: sub start_block {
105: my ($target,$token,$parstack,$parser,$safeeval)=@_;
106:
107: my $code = @$parstack[$#$parstack];
108: $code =~ s/\"//g;
109: $code .=';return $condition;';
110: # print "<br>$code<br>";
111: my $result = &Apache::run::run($code,$safeeval);
112: &Apache::lonxml::debug("block :$code: returned :$result:");
113: if ( ! $result ) {
114: my $skip=&Apache::lonxml::get_all_text("/block",$$parser[$#$parser]);
115: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[$#$parser]");
116: }
117: return "";
118: }
119:
120: sub end_block {
121: }
122:
123: sub start_while {
124: my ($target,$token,$parstack,$parser,$safeeval)=@_;
125:
126: my $code = @$parstack[$#$parstack];
127: $code =~ s/\"//g;
128: $code .=';return $condition;';
129:
130: push( @Apache::structuretags::whileconds, $code);
131: my $result = &Apache::run::run($code,$safeeval);
132: my $bodytext=$$parser[$#$parser]->get_text("/while");
133: push( @Apache::structuretags::whilebody, $bodytext);
134: if ( $result ) {
135: &Apache::lonxml::newparser($parser,\$bodytext);
136: }
137: return "";
138: }
139:
140: sub end_while {
141: my ($target,$token,$parstack,$parser,$safeeval)=@_;
142: my $code = pop @Apache::structuretags::whileconds;
143: my $bodytext = pop @Apache::structuretags::whilebody;
144: my $result = &Apache::run::run($code,$safeeval);
145: if ( $result ) {
146: &Apache::lonxml::newparser($parser,\$bodytext);
147: }
148: return "";
149: }
150:
151: # <randomlist>
152: # <tag1>..</tag1>
153: # <tag2>..</tag2>
154: # <tag3>..</tag3>
155: # ...
156: # </randomlist>
157: sub start_randomlist {
158: my ($target,$token,$parstack,$parser,$safeeval)=@_;
159: my $body= &Apache::lonxml::get_all_text("/randomlist",$$parser[$#$parser]);
160: my $b_parser= HTML::TokeParser->new(\$body);
161: my $b_tok;
162: my @randomlist;
163: my $list_item;
164:
165: while($b_tok = $b_parser->get_token() ) {
166: if($b_tok->[0] eq 'S') { # start tag
167: # get content of the tag until matching end tag
168: # get all text upto the matching tag
169: # and push the content into @randomlist
170: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],$b_parser);
171: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
172: push(@randomlist,$list_item);
173: # print "<BR><B>START-TAG $b_tok->[1], $b_tok->[4], $list_item</B>";
174: }
175: if($b_tok->[0] eq 'T') { # text
176: # what to do with text in between tags?
177: # print "<B>TEXT $b_tok->[1]</B><BR>";
178: }
179: # if($b_tok->[0] eq 'E') { # end tag, should not happen
180: # print "<B>END-TAG $b_tok->[1]</B><BR>";
181: # }
182: }
183: my @idx_arr = (0 .. $#randomlist);
184: &Apache::structuretags::shuffle(\@idx_arr);
185: my $bodytext = '';
186: for(0 .. $#randomlist) {
187: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
188: }
189:
190: &Apache::lonxml::newparser($parser,\$bodytext);
191: return "";
192: }
193:
194: sub shuffle {
195: my $a=shift;
196: my $i;
197: for($i=@$a;--$i;) {
198: my $j=int rand($i+1);
199: next if $i == $j;
200: @$a[$i,$j] = @$a[$j,$i];
201: }
202: }
203:
204: sub end_randomlist {
205: }
206:
207: sub start_part {
208: my ($target,$token,$parstack,$parser,$safeeval)=@_;
209: my $args ='';
210: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
211: my $id = &Apache::run::run("{$args;".'return $id}',$safeeval);
212: $Apache::inputtags::part=$id;
213: @Apache::inputtags::responselist = ();
214: if ($target eq 'meta') {
215: return &Apache::response::mandatory_part_meta;
216: } else {
217: my ($status,$datemsg) = &Apache::lonhomework::check_date("OPEN_DATE",$id);
218: push (@Apache::inputtags::status,$status);
219: my $expression='$external::datestatus="'.$status.'";';
220: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
221: &Apache::run::run($expression,$safeeval);
222: if ( $status eq 'CLOSED' ) {
223: my $bodytext=&Apache::lonxml::get_all_text("/part",$$parser[$#$parser]);
224: if ( $target eq "web" ) {
225: return "<br></br>Part is not open to be viewed. It $datemsg<br></br>";
226: }
227: }
228: }
229: return '';
230: }
231:
232: sub end_part {
233: my ($target,$token,$parstack,$parser,$safeeval)=@_;
234: &Apache::lonxml::debug("in end_part $target ");
235: my $status=$Apache::inputtags::status['-1'];
236: pop @Apache::inputtags::status;
237: if ( $target eq 'meta' ) { return ''; }
238: if ( $target eq 'grade' && $status eq 'CAN_ANSWER') {
239: return &Apache::inputtags::grade;
240: }
241: return &Apache::inputtags::gradestatus($Apache::inputtags::part);
242: }
243:
244: sub start_preduedate {
245: my ($target,$token,$parstack,$parser,$safeeval)=@_;
246: if ($target ne 'meta') {
247: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
248: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' ) {
249: &Apache::lonxml::get_all_text("/preduedate",$$parser[$#$parser]);
250: }
251: }
252: return '';
253: }
254:
255: sub end_preduedate {
256: return '';
257: }
258:
259: sub start_postanswerdate {
260: my ($target,$token,$parstack,$parser,$safeeval)=@_;
261: if ($target ne 'meta') {
262: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
263: &Apache::lonxml::get_all_text("/postanswerdate",$$parser[$#$parser]);
264: }
265: }
266: return '';
267: }
268:
269: sub end_postanswerdate {
270: return '';
271: }
272:
273: sub start_notsolved {
274: my ($target,$token,$parstack,$parser,$safeeval)=@_;
275: if ($target ne 'meta') {
276: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
277: &Apache::lonxml::debug("not solved has :$gradestatus:");
278: if ($gradestatus =~ /^correct/) {
279: &Apache::lonxml::debug("skipping");
280: &Apache::lonxml::get_all_text("/notsolved",$$parser[$#$parser]);
281: }
282: }
283: return '';
284: }
285:
286: sub end_notsolved {
287: return '';
288: }
289:
290: sub start_solved {
291: my ($target,$token,$parstack,$parser,$safeeval)=@_;
292: if ($target ne 'meta') {
293: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
294: if ($gradestatus !~ /^correct/) {
295: &Apache::lonxml::get_all_text("/solved",$$parser[$#$parser]);
296: }
297: }
298: return '';
299: }
300:
301: sub end_solved {
302: return '';
303: }
304: 1;
305: __END__
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