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",$$parser[$#$parser]);
56: if ( $target eq "web" ) {
57: return "<body bgcolor=\"#FFFFFF\"> <br />Problem is not open to be viewed. The problem $datemsg<br />";
58: }
59: }
60: }
61: if ($target eq 'web') {
62: my $args ='';
63: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
64: my $name = &Apache::run::run("{$args;".'return $name}',$safeeval);
65: if ($name eq '') {
66: $name=&Apache::lonnet::EXT('resource.title');
67: if ($name eq 'con_lost') { $name = ''; }
68: }
69: $Apache::lonhomework::name=$name;
70: if ($status eq 'CAN_ANSWER') {
71: # create a page header and exit
72: return "<title>$name</title>\n<body bgcolor=#FFFFFF>\n<form name=\"lonhomework\" method=\"POST\" action=\"".$ENV{'request.uri'}."\">".'<input type="hidden" name="submitted" value="yes">';
73: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' || $status eq 'CLOSED') {
74: return "<title>$name</title>\n<body bgcolor=#FFFFFF>\n";
75: }
76: }
77: return '';
78: }
79:
80: sub end_problem {
81: my ($target,$token,$parstack,$parser,$safeeval)=@_;
82: my $result='';
83: my $status=$Apache::inputtags::status['-1'];
84: unless ($target eq 'meta') {
85: if ( $target eq 'grade' && $Apache::inputtags::part eq '0' &&
86: $status eq 'CAN_ANSWER') {
87: # if part is zero, no <part>s existed, so we need to the grading
88: &Apache::inputtags::grade;
89: } elsif ($Apache::inputtags::part eq '0') {
90: # if part is zero, no <part>s existed, so we need show the current
91: # grading status
92: $result.= &Apache::inputtags::gradestatus($Apache::inputtags::part);
93: }
94: if ($target eq 'web') {
95: if ($status eq 'CAN_ANSWER') {
96: $result.="</form></body>\n";
97: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER') {
98: $result.="</body>\n";
99: }
100: }
101: } else {
102: if ($Apache::inputtags::part eq '0') {
103: $result=&Apache::response::mandatory_part_meta;
104: }
105: }
106: return $result;
107: }
108:
109: sub start_block {
110: my ($target,$token,$parstack,$parser,$safeeval)=@_;
111:
112: my $code = @$parstack[$#$parstack];
113: $code =~ s/\"//g;
114: $code .=';return $condition;';
115: # print "<br />$code<br />";
116: my $result = &Apache::run::run($code,$safeeval);
117: &Apache::lonxml::debug("block :$code: returned :$result:");
118: if ( ! $result ) {
119: my $skip=&Apache::lonxml::get_all_text("/block",$$parser[$#$parser]);
120: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[$#$parser]");
121: }
122: return "";
123: }
124:
125: sub end_block {
126: }
127:
128: sub start_while {
129: my ($target,$token,$parstack,$parser,$safeeval)=@_;
130:
131: my $code = @$parstack[$#$parstack];
132: $code =~ s/\"//g;
133: $code .=';return $condition;';
134:
135: push( @Apache::structuretags::whileconds, $code);
136: my $result = &Apache::run::run($code,$safeeval);
137: my $bodytext=$$parser[$#$parser]->get_text("/while");
138: push( @Apache::structuretags::whilebody, $bodytext);
139: if ( $result ) {
140: &Apache::lonxml::newparser($parser,\$bodytext);
141: }
142: return "";
143: }
144:
145: sub end_while {
146: my ($target,$token,$parstack,$parser,$safeeval)=@_;
147: my $code = pop @Apache::structuretags::whileconds;
148: my $bodytext = pop @Apache::structuretags::whilebody;
149: my $result = &Apache::run::run($code,$safeeval);
150: if ( $result ) {
151: &Apache::lonxml::newparser($parser,\$bodytext);
152: }
153: return "";
154: }
155:
156: # <randomlist>
157: # <tag1>..</tag1>
158: # <tag2>..</tag2>
159: # <tag3>..</tag3>
160: # ...
161: # </randomlist>
162: sub start_randomlist {
163: my ($target,$token,$parstack,$parser,$safeeval)=@_;
164: my $body= &Apache::lonxml::get_all_text("/randomlist",$$parser[$#$parser]);
165: my $b_parser= HTML::TokeParser->new(\$body);
166: my $b_tok;
167: my @randomlist;
168: my $list_item;
169:
170: while($b_tok = $b_parser->get_token() ) {
171: if($b_tok->[0] eq 'S') { # start tag
172: # get content of the tag until matching end tag
173: # get all text upto the matching tag
174: # and push the content into @randomlist
175: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],$b_parser);
176: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
177: push(@randomlist,$list_item);
178: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4], $list_item</b>";
179: }
180: if($b_tok->[0] eq 'T') { # text
181: # what to do with text in between tags?
182: # print "<b>TEXT $b_tok->[1]</b><br />";
183: }
184: # if($b_tok->[0] eq 'E') { # end tag, should not happen
185: # print "<b>END-TAG $b_tok->[1]</b><br />";
186: # }
187: }
188: my @idx_arr = (0 .. $#randomlist);
189: &Apache::structuretags::shuffle(\@idx_arr);
190: my $bodytext = '';
191: for(0 .. $#randomlist) {
192: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
193: }
194:
195: &Apache::lonxml::newparser($parser,\$bodytext);
196: return "";
197: }
198:
199: sub shuffle {
200: my $a=shift;
201: my $i;
202: for($i=@$a;--$i;) {
203: my $j=int rand($i+1);
204: next if $i == $j;
205: @$a[$i,$j] = @$a[$j,$i];
206: }
207: }
208:
209: sub end_randomlist {
210: }
211:
212: sub start_part {
213: my ($target,$token,$parstack,$parser,$safeeval)=@_;
214: my $args ='';
215: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
216: my $id = &Apache::run::run("{$args;".'return $id}',$safeeval);
217: $Apache::inputtags::part=$id;
218: @Apache::inputtags::responselist = ();
219: if ($target eq 'meta') {
220: return &Apache::response::mandatory_part_meta;
221: } else {
222: my ($status,$datemsg) = &Apache::lonhomework::check_date("OPEN_DATE",$id);
223: push (@Apache::inputtags::status,$status);
224: my $expression='$external::datestatus="'.$status.'";';
225: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
226: &Apache::run::run($expression,$safeeval);
227: if ( $status eq 'CLOSED' ) {
228: my $bodytext=&Apache::lonxml::get_all_text("/part",$$parser[$#$parser]);
229: if ( $target eq "web" ) {
230: return "<br />Part is not open to be viewed. It $datemsg<br />";
231: }
232: }
233: }
234: return '';
235: }
236:
237: sub end_part {
238: my ($target,$token,$parstack,$parser,$safeeval)=@_;
239: &Apache::lonxml::debug("in end_part $target ");
240: my $status=$Apache::inputtags::status['-1'];
241: pop @Apache::inputtags::status;
242: if ( $target eq 'meta' ) { return ''; }
243: if ( $target eq 'grade' && $status eq 'CAN_ANSWER') {
244: return &Apache::inputtags::grade;
245: }
246: return &Apache::inputtags::gradestatus($Apache::inputtags::part);
247: }
248:
249: sub start_preduedate {
250: my ($target,$token,$parstack,$parser,$safeeval)=@_;
251: if ($target ne 'meta') {
252: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
253: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' ) {
254: &Apache::lonxml::get_all_text("/preduedate",$$parser[$#$parser]);
255: }
256: }
257: return '';
258: }
259:
260: sub end_preduedate {
261: return '';
262: }
263:
264: sub start_postanswerdate {
265: my ($target,$token,$parstack,$parser,$safeeval)=@_;
266: if ($target ne 'meta') {
267: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
268: &Apache::lonxml::get_all_text("/postanswerdate",$$parser[$#$parser]);
269: }
270: }
271: return '';
272: }
273:
274: sub end_postanswerdate {
275: return '';
276: }
277:
278: sub start_notsolved {
279: my ($target,$token,$parstack,$parser,$safeeval)=@_;
280: if ($target ne 'meta') {
281: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
282: &Apache::lonxml::debug("not solved has :$gradestatus:");
283: if ($gradestatus =~ /^correct/) {
284: &Apache::lonxml::debug("skipping");
285: &Apache::lonxml::get_all_text("/notsolved",$$parser[$#$parser]);
286: }
287: }
288: return '';
289: }
290:
291: sub end_notsolved {
292: return '';
293: }
294:
295: sub start_solved {
296: my ($target,$token,$parstack,$parser,$safeeval)=@_;
297: if ($target ne 'meta') {
298: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
299: if ($gradestatus !~ /^correct/) {
300: &Apache::lonxml::get_all_text("/solved",$$parser[$#$parser]);
301: }
302: }
303: return '';
304: }
305:
306: sub end_solved {
307: return '';
308: }
309: 1;
310: __END__
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