1: # The LearningOnline Network with CAPA
2: # Navigate Maps Handler
3: #
4: # (Page Handler
5: #
6: # (TeX Content Handler
7: #
8: # 05/29/00,05/30 Gerd Kortemeyer)
9: # 08/30,08/31,09/06,09/14,09/15,09/16,09/19,09/20,09/21,09/23,
10: # 10/02,10/10,10/14,10/16,10/18,10/19,10/31,11/6,11/14,11/16 Gerd Kortemeyer)
11: #
12: # 3/1/1,6/1,17/1,29/1,30/1,2/8 Gerd Kortemeyer
13:
14: package Apache::lonnavmaps;
15:
16: use strict;
17: use Apache::Constants qw(:common :http);
18: use Apache::lonnet();
19: use HTML::TokeParser;
20: use GDBM_File;
21:
22: # -------------------------------------------------------------- Module Globals
23: my %hash;
24: my @rows;
25:
26: #
27: # These cache hashes need to be independent of user, resource and course
28: # (user and course can/should be in the keys)
29: #
30:
31: my %courserdatas;
32: my %userrdatas;
33:
34: #
35: # These global hashes are dependent on user, course and resource,
36: # and need to be initialized every time when a sheet is calculated
37: #
38: my %courseopt;
39: my %useropt;
40: my %parmhash;
41:
42:
43: # ------------------------------------------------------------------ Euclid gcd
44:
45: sub euclid {
46: my ($e,$f)=@_;
47: my $a; my $b; my $r;
48: if ($e>$f) { $b=$e; $r=$f; } else { $r=$e; $b=$f; }
49: while ($r!=0) {
50: $a=$b; $b=$r;
51: $r=$a%$b;
52: }
53: return $b;
54: }
55:
56: # --------------------------------------------------------------------- Parmval
57:
58: # -------------------------------------------- Figure out a cascading parameter
59: #
60: # For this function to work
61: #
62: # * parmhash needs to be tied
63: # * courseopt and useropt need to be initialized for this user and course
64: #
65:
66: sub parmval {
67: my ($what,$symb)=@_;
68: my $cid=$ENV{'request.course.id'};
69: my $csec=$ENV{'request.course.sec'};
70: my $uname=$ENV{'user.name'};
71: my $udom=$ENV{'user.domain'};
72:
73: unless ($symb) { return ''; }
74: my $result='';
75:
76: my ($mapname,$id,$fn)=split(/\_\_\_/,$symb);
77:
78: # ----------------------------------------------------- Cascading lookup scheme
79: my $rwhat=$what;
80: $what=~s/^parameter\_//;
81: $what=~s/\_/\./;
82:
83: my $symbparm=$symb.'.'.$what;
84: my $mapparm=$mapname.'___(all).'.$what;
85: my $usercourseprefix=$uname.'_'.$udom.'_'.$cid;
86:
87: my $seclevel=
88: $usercourseprefix.'.['.
89: $csec.'].'.$what;
90: my $seclevelr=
91: $usercourseprefix.'.['.
92: $csec.'].'.$symbparm;
93: my $seclevelm=
94: $usercourseprefix.'.['.
95: $csec.'].'.$mapparm;
96:
97: my $courselevel=
98: $usercourseprefix.'.'.$what;
99: my $courselevelr=
100: $usercourseprefix.'.'.$symbparm;
101: my $courselevelm=
102: $usercourseprefix.'.'.$mapparm;
103:
104: # ---------------------------------------------------------- fourth, check user
105:
106: if ($uname) {
107:
108: if ($useropt{$courselevelr}) { return $useropt{$courselevelr}; }
109:
110: if ($useropt{$courselevelm}) { return $useropt{$courselevelm}; }
111:
112: if ($useropt{$courselevel}) { return $useropt{$courselevel}; }
113:
114: }
115:
116: # --------------------------------------------------------- third, check course
117:
118: if ($csec) {
119:
120: if ($courseopt{$seclevelr}) { return $courseopt{$seclevelr}; }
121:
122: if ($courseopt{$seclevelm}) { return $courseopt{$seclevelm}; }
123:
124: if ($courseopt{$seclevel}) { return $courseopt{$seclevel}; }
125:
126: }
127:
128: if ($courseopt{$courselevelr}) { return $courseopt{$courselevelr}; }
129:
130: if ($courseopt{$courselevelm}) { return $courseopt{$courselevelm}; }
131:
132: if ($courseopt{$courselevel}) { return $courseopt{$courselevel}; }
133:
134: # ----------------------------------------------------- second, check map parms
135:
136: my $thisparm=$parmhash{$symbparm};
137: if ($thisparm) { return $thisparm; }
138:
139: # -------------------------------------------------------- first, check default
140:
141: return &Apache::lonnet::metadata($fn,$rwhat.'.default');
142:
143: }
144:
145:
146:
147: # ------------------------------------------------------------- Find out status
148:
149: sub astatus {
150: my $rid=shift;
151: my $code=1;
152: my $ctext='';
153: $rid=~/(\d+)\.(\d+)/;
154: my $symb=&Apache::lonnet::declutter($hash{'map_id_'.$1}).'___'.$2.'___'.
155: &Apache::lonnet::declutter($hash{'src_'.$rid});
156: my $duedate=&parmval('0.duedate',$symb);
157: my $opendate=&parmval('0.opendate',$symb);
158: my $answerdate=&parmval('0.answerdate',$symb);
159: my $now=time;
160: my $tcode=0;
161: if ($opendate) {
162: if ($now<$duedate) {
163: $tcode=2;
164: $ctext='Due: '.localtime($duedate);
165: if ($now<$opendate) {
166: $tcode=1;
167: $ctext='Open: '.localtime($opendate);
168: }
169: if ($duedate-$now<86400) {
170: $tcode=4;
171: $ctext='Due: '.localtime($duedate);
172: }
173: } else {
174: $tcode=3;
175: if ($now<$answerdate) {
176: $ctext='Answer: '.localtime($duedate);
177: }
178: }
179: } else {
180: $tcode=1;
181: }
182: my $answer=&Apache::lonnet::reply(
183: "restore:$ENV{'user.domain'}:$ENV{'user.name'}:".
184: $ENV{'request.course.id'}.':'.
185: &Apache::lonnet::escape($symb),
186: "$ENV{'user.home'}");
187: my %returnhash=();
188: map {
189: my ($name,$value)=split(/\=/,$_);
190: $returnhash{&Apache::lonnet::unescape($name)}=
191: &Apache::lonnet::unescape($value);
192: } split(/\&/,$answer);
193: if ($returnhash{'version'}) {
194: my $version;
195: for ($version=1;$version<=$returnhash{'version'};$version++) {
196: map {
197: $returnhash{$_}=$returnhash{$version.':'.$_};
198: } split(/\:/,$returnhash{$version.':keys'});
199: }
200: map {
201: if (($_=~/\.(\w+)\.solved$/) && ($_!~/^\d+\:/)) {
202: my $part=$1;
203: if ($ctext) { $ctext.=', '; }
204: if ($part) {
205: $ctext.='Part '.$part.': ';
206: }
207: if ($returnhash{$_} eq 'correct_by_student') {
208: unless ($code==2) { $code=3; }
209: $ctext.='solved';
210: } elsif ($returnhash{$_} eq 'correct_by_override') {
211: unless ($code==2) { $code=3; }
212: $ctext.='override';
213: } elsif ($returnhash{$_} eq 'incorrect_attempted') {
214: $code=2;
215: $ctext.=
216: $returnhash{'resource.'.$part.'.tries'}.'/'.
217: &parmval($part.'.maxtries',$symb).' tries';
218: } elsif ($returnhash{$_} eq 'incorrect_by_override') {
219: $code=2;
220: $ctext.='override';
221: } elsif ($returnhash{$_} eq 'excused') {
222: unless ($code==2) { $code=3; }
223: $ctext.='excused';
224: }
225: }
226: } keys %returnhash;
227: }
228: return 'p'.$code.$tcode.'"'.$ctext.'"';
229: }
230:
231: # ------------------------------------------------------------ Build page table
232:
233: sub tracetable {
234: my ($sofar,$rid,$beenhere)=@_;
235: my $further=$sofar;
236: unless ($beenhere=~/\&$rid\&/) {
237: $beenhere.=$rid.'&';
238:
239: if (defined($hash{'is_map_'.$rid})) {
240: $sofar++;
241: my $tprefix='';
242: if ($hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$rid}}}
243: eq 'sequence') {
244: $tprefix='h';
245: }
246: if (defined($rows[$sofar])) {
247: $rows[$sofar].='&'.$tprefix.$rid;
248: } else {
249: $rows[$sofar]=$tprefix.$rid;
250: }
251: if ((defined($hash{'map_start_'.$hash{'src_'.$rid}})) &&
252: (defined($hash{'map_finish_'.$hash{'src_'.$rid}})) &&
253: ($tprefix eq 'h')) {
254: my $frid=$hash{'map_finish_'.$hash{'src_'.$rid}};
255: $sofar=
256: &tracetable($sofar,$hash{'map_start_'.$hash{'src_'.$rid}},
257: '&'.$frid.'&');
258: $sofar++;
259: if ($hash{'src_'.$frid}) {
260: my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$frid});
261: if (($brepriv eq '2') || ($brepriv eq 'F')) {
262: my $pprefix='';
263: if ($hash{'src_'.$frid}=~
264: /\.(problem|exam|quiz|assess|survey|form)$/) {
265: $pprefix=&astatus($frid);
266:
267: }
268: if (defined($rows[$sofar])) {
269: $rows[$sofar].='&'.$pprefix.$frid;
270: } else {
271: $rows[$sofar]=$pprefix.$frid;
272: }
273: }
274: }
275: }
276: } else {
277: $sofar++;
278: if ($hash{'src_'.$rid}) {
279: my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$rid});
280: if (($brepriv eq '2') || ($brepriv eq 'F')) {
281: my $pprefix='';
282: if ($hash{'src_'.$rid}=~
283: /\.(problem|exam|quiz|assess|survey|form)$/) {
284: $pprefix=&astatus($rid);
285: }
286: if (defined($rows[$sofar])) {
287: $rows[$sofar].='&'.$pprefix.$rid;
288: } else {
289: $rows[$sofar]=$pprefix.$rid;
290: }
291: }
292: }
293: }
294:
295: if (defined($hash{'to_'.$rid})) {
296: my $mincond=1;
297: my $next='';
298: map {
299: my $thiscond=
300: &Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}});
301: if ($thiscond>=$mincond) {
302: if ($next) {
303: $next.=','.$_.':'.$thiscond;
304: } else {
305: $next=$_.':'.$thiscond;
306: }
307: if ($thiscond>$mincond) { $mincond=$thiscond; }
308: }
309: } split(/\,/,$hash{'to_'.$rid});
310: map {
311: my ($linkid,$condval)=split(/\:/,$_);
312: if ($condval>=$mincond) {
313: my $now=&tracetable($sofar,$hash{'goesto_'.$linkid},$beenhere);
314: if ($now>$further) { $further=$now; }
315: }
316: } split(/\,/,$next);
317:
318: }
319: }
320: return $further;
321: }
322:
323: # ================================================================ Main Handler
324:
325: sub handler {
326: my $r=shift;
327:
328:
329: # ------------------------------------------- Set document type for header only
330:
331: if ($r->header_only) {
332: if ($ENV{'browser.mathml'}) {
333: $r->content_type('text/xml');
334: } else {
335: $r->content_type('text/html');
336: }
337: $r->send_http_header;
338: return OK;
339: }
340:
341: my $requrl=$r->uri;
342: # ----------------------------------------------------------------- Tie db file
343: if ($ENV{'request.course.fn'}) {
344: my $fn=$ENV{'request.course.fn'};
345: if (-e "$fn.db") {
346: if ((tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER,0640)) &&
347: (tie(%parmhash,'GDBM_File',
348: $ENV{'request.course.fn'}.'_parms.db',&GDBM_READER,0640))) {
349: # ------------------------------------------------------------------- Hash tied
350: my $firstres=$hash{'map_start_/res/'.$ENV{'request.course.uri'}};
351: my $lastres=$hash{'map_finish_/res/'.$ENV{'request.course.uri'}};
352: if (($firstres) && ($lastres)) {
353: # ----------------------------------------------------------------- Render page
354: # -------------------------------------------------------------- Set parameters
355:
356:
357: # ---------------------------- initialize coursedata and userdata for this user
358: undef %courseopt;
359: undef %useropt;
360:
361: my $uname=$ENV{'user.name'};
362: my $udom=$ENV{'user.domain'};
363: my $uhome=$ENV{'user.home'};
364: my $cid=$ENV{'request.course.id'};
365: my $chome=$ENV{'course.'.$cid.'.home'};
366: my ($cdom,$cnum)=split(/\_/,$cid);
367:
368: my $userprefix=$uname.'_'.$udom.'_';
369:
370: unless ($uhome eq 'no_host') {
371: # -------------------------------------------------------------- Get coursedata
372: unless
373: ((time-$courserdatas{$cid.'.last_cache'})<240) {
374: my $reply=&Apache::lonnet::reply('dump:'.$cdom.':'.$cnum.
375: ':resourcedata',$chome);
376: if ($reply!~/^error\:/) {
377: $courserdatas{$cid}=$reply;
378: $courserdatas{$cid.'.last_cache'}=time;
379: }
380: }
381: map {
382: my ($name,$value)=split(/\=/,$_);
383: $courseopt{$userprefix.&Apache::lonnet::unescape($name)}=
384: &Apache::lonnet::unescape($value);
385: } split(/\&/,$courserdatas{$cid});
386: # --------------------------------------------------- Get userdata (if present)
387: unless
388: ((time-$userrdatas{$uname.'___'.$udom.'.last_cache'})<240) {
389: my $reply=
390: &Apache::lonnet::reply('dump:'.$udom.':'.$uname.':resourcedata',$uhome);
391: if ($reply!~/^error\:/) {
392: $userrdatas{$uname.'___'.$udom}=$reply;
393: $userrdatas{$uname.'___'.$udom.'.last_cache'}=time;
394: }
395: }
396: map {
397: my ($name,$value)=split(/\=/,$_);
398: $useropt{$userprefix.&Apache::lonnet::unescape($name)}=
399: &Apache::lonnet::unescape($value);
400: } split(/\&/,$userrdatas{$uname.'___'.$udom});
401: }
402:
403: @rows=();
404:
405: &tracetable(0,$firstres,'&'.$lastres.'&');
406: if ($hash{'src_'.$lastres}) {
407: my $brepriv=
408: &Apache::lonnet::allowed('bre',$hash{'src_'.$lastres});
409: if (($brepriv eq '2') || ($brepriv eq 'F')) {
410: $rows[$#rows+1]=''.$lastres;
411: }
412: }
413:
414: # ------------------------------------------------------------------ Page parms
415:
416: my $j;
417: my $i;
418: my $lcm=1;
419: my $contents=0;
420:
421: # ---------------------------------------------- Go through table to get layout
422:
423: for ($i=0;$i<=$#rows;$i++) {
424: if ($rows[$i]) {
425: $contents++;
426: my @colcont=split(/\&/,$rows[$i]);
427: $lcm*=($#colcont+1)/euclid($lcm,($#colcont+1));
428: }
429: }
430:
431:
432: unless ($contents) {
433: $r->content_type('text/html');
434: $r->send_http_header;
435: $r->print('<html><body>Empty Map.</body></html>');
436: } else {
437:
438: # ------------------------------------------------------------------ Build page
439:
440: my $currenturl=$ENV{'form.postdata'};
441: $currenturl=~s/^http\:\/\///;
442: $currenturl=~s/^[^\/]+//;
443:
444: # ---------------------------------------------------------------- Send headers
445:
446: $r->content_type('text/html');
447: $r->send_http_header;
448: $r->print(
449: '<html><head><title>Navigate LON-CAPA Maps</title></head>');
450:
451: $r->print('<body bgcolor="#FFFFFF"');
452: if ($currenturl=~/^\/res/) {
453: $r->print(' onLoad="window.location.hash='.
454: "'curloc'".'"');
455: }
456: $r->print('><script>window.focus();</script>'.
457: '<img align=right src=/adm/lonIcons/lonlogos.gif>'.
458: '<h1>Navigate Course Map</h1>');
459: $r->rflush();
460: if ($currenturl=~/^\/res/) {
461: $r->print('<a href="#curloc">Current Location</a><p>');
462: }
463: # ----------------------------------------------------- The little content list
464: for ($i=0;$i<=$#rows;$i++) {
465: if ($rows[$i]) {
466: my @colcont=split(/\&/,$rows[$i]);
467: my $avespan=$lcm/($#colcont+1);
468: for ($j=0;$j<=$#colcont;$j++) {
469: my $rid=$colcont[$j];
470: if ($rid=~/^h(.+)/) {
471: $rid=$1;
472: $r->print(
473: ' <a href="#'.$rid.'">'.$hash{'title_'.$rid}.'</a><br>');
474: }
475: }
476: }
477: }
478: # ----------------------------------------------------------------- Start table
479: $r->print('<table cols="'.$lcm.'" border="0">');
480: for ($i=0;$i<=$#rows;$i++) {
481: if ($rows[$i]) {
482: $r->print("\n<tr>");
483: my @colcont=split(/\&/,$rows[$i]);
484: my $avespan=$lcm/($#colcont+1);
485: for ($j=0;$j<=$#colcont;$j++) {
486: my $rid=$colcont[$j];
487: my $add='<td> ';
488: my $adde='</td>';
489: my $hwk='<font color="#223322">';
490: my $hwke='</font>';
491: if ($rid=~/^h(.+)/) {
492: $rid=$1;
493: $add=
494: '<th bgcolor="#AAFF55"><a name="'.$rid.'">';
495: $adde='</th>';
496: }
497: if ($rid=~/^p(\d)(\d)\"([\w\: \(\)\/\,]*)\"(.+)/) {
498: my $code=$1;
499: my $tcode=$2;
500: my $ctext=$3;
501: $rid=$4;
502: if ($tcode eq '1') {
503: $add='<td bgcolor="#AAAAAA">';
504: }
505: if ($code eq '3') {
506: $add='<td bgcolor="#AAFFAA">';
507: } else {
508: $add='<td bgcolor="#FFAAAA">';
509: if ($tcode eq '2') {
510: $add='<td bgcolor="#FFFFAA">';
511: }
512: if ($tcode eq '4') {
513: $add='<td bgcolor="#FFFF33"><blink>';
514: $adde='</blink></td>';
515: }
516: }
517: $hwk='<font color="#888811"><b>';
518: $hwke='</b></font>';
519: if ($code eq '1') {
520: $hwke='</b> ('.$ctext.')</font>';
521: }
522: if ($code eq '2') {
523: $hwk='<font color="#992222"><b>';
524: $hwke='</b> ('.$ctext.')</font>';
525: }
526: if ($code eq '3') {
527: $hwk='<font color="#229922"><b>';
528: $hwke='</b> ('.$ctext.')</font>';
529: }
530: }
531: if ($hash{'src_'.$rid} eq $currenturl) {
532: $add=$add.'<a name="curloc"></a>'.
533: '<font color=red><b>-> </b></font>';
534: $adde=
535: '<font color=red><b> <-</b></font>'.$adde;
536: }
537: $r->print($add.'<a href="'.$hash{'src_'.$rid}.
538: '">'.$hwk.
539: $hash{'title_'.$rid}.$hwke.'</a>'.$adde);
540: }
541: $r->print('</tr>');
542: }
543: }
544: $r->print("\n</table>");
545: $r->print('</body></html>');
546: # -------------------------------------------------------------------- End page
547: }
548: # ------------------------------------------------------------- End render page
549: } else {
550: $r->content_type('text/html');
551: $r->send_http_header;
552: $r->print('<html><body>Coursemap undefined.</body></html>');
553: }
554: # ------------------------------------------------------------------ Untie hash
555: unless (untie(%hash)) {
556: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
557: "Could not untie coursemap $fn (browse).</font>");
558: }
559: unless (untie(%parmhash)) {
560: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
561: "Could not untie parmhash (browse).</font>");
562: }
563: # -------------------------------------------------------------------- All done
564: return OK;
565: # ----------------------------------------------- Errors, hash could no be tied
566: }
567: }
568: }
569:
570: $ENV{'user.error.msg'}="$requrl:bre:0:0:Course not initialized";
571: return HTTP_NOT_ACCEPTABLE;
572: }
573:
574: 1;
575: __END__
576:
577:
578:
579:
580:
581:
582:
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