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: # 3/1/1,6/1,17/1,29/1,30/1,2/8,9/21,9/24,9/25 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_'.$rid});
156:
157: my %duedate=();
158: my %opendate=();
159: my %answerdate=();
160: map {
161: if ($_=~/^parameter\_(.*)\_opendate$/) {
162: my $part=$1;
163: $duedate{$part}=&parmval($part.'.duedate',$symb);
164: $opendate{$part}=&parmval($part.'.opendate',$symb);
165: $answerdate{$part}=&parmval($part.'.answerdate',$symb);
166: }
167: } sort split(/\,/,&Apache::lonnet::metadata($hash{'src_'.$rid},'keys'));
168:
169: my $now=time;
170: my $tcode=0;
171:
172: my %returnhash=&Apache::lonnet::restore($symb);
173:
174: map {
175:
176: my $duedate=$duedate{$_};
177: my $opendate=$opendate{$_};
178: my $answerdate=$answerdate{$_};
179: my $preface='';
180: unless ($_ eq '0') { $preface=' Part: '.$_.' '; }
181: if ($opendate) {
182: if ($now<$duedate) {
183: unless ($tcode==4) { $tcode=2; }
184: $ctext.=$preface.'Due: '.localtime($duedate);
185: if ($now<$opendate) {
186: unless ($tcode) { $tcode=1; }
187: $ctext.=$preface.'Open: '.localtime($opendate);
188: }
189: if ($duedate-$now<86400) {
190: $tcode=4;
191: $ctext.=$preface.'Due: '.localtime($duedate);
192: }
193: } else {
194: unless (($tcode==4) || ($tcode eq 2)) { $tcode=3; }
195: if ($now<$answerdate) {
196: $ctext.='Answer: '.localtime($duedate);
197: }
198: }
199: } else {
200: unless (($tcode==2) || ($tcode==4)) { $tcode=1; }
201: }
202:
203: my $status=$returnhash{'resource.'.$_.'.solved'};
204:
205: if ($status eq 'correct_by_student') {
206: unless ($code==2) { $code=3; }
207: $ctext.=' solved';
208: } elsif ($status eq 'correct_by_override') {
209: unless ($code==2) { $code=3; }
210: $ctext.=' override';
211: } elsif ($status eq 'incorrect_attempted') {
212: $code=2;
213: $ctext.=' ('.
214: ($returnhash{'resource.'.$_.'.tries'}?
215: $returnhash{'resource.'.$_.'.tries'}:'0').'/'.
216: &parmval($_.'.maxtries',$symb).' tries)';
217: } elsif ($status eq 'incorrect_by_override') {
218: $code=2;
219: $ctext.=' override';
220: } elsif ($status eq 'excused') {
221: unless ($code==2) { $code=3; }
222: $ctext.=' excused';
223: }
224:
225: } sort keys %opendate;
226:
227: return 'p'.$code.$tcode.'"'.$ctext.'"';
228: }
229:
230: # ------------------------------------------------------------ Build page table
231:
232: sub tracetable {
233: my ($sofar,$rid,$beenhere)=@_;
234: my $further=$sofar;
235: unless ($beenhere=~/\&$rid\&/) {
236: $beenhere.=$rid.'&';
237:
238: if (defined($hash{'is_map_'.$rid})) {
239: $sofar++;
240: my $tprefix='';
241: if ($hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$rid}}}
242: eq 'sequence') {
243: $tprefix='h';
244: }
245: if (defined($rows[$sofar])) {
246: $rows[$sofar].='&'.$tprefix.$rid;
247: } else {
248: $rows[$sofar]=$tprefix.$rid;
249: }
250: if ((defined($hash{'map_start_'.$hash{'src_'.$rid}})) &&
251: (defined($hash{'map_finish_'.$hash{'src_'.$rid}})) &&
252: ($tprefix eq 'h')) {
253: my $frid=$hash{'map_finish_'.$hash{'src_'.$rid}};
254: $sofar=
255: &tracetable($sofar,$hash{'map_start_'.$hash{'src_'.$rid}},
256: '&'.$frid.'&');
257: $sofar++;
258: if ($hash{'src_'.$frid}) {
259: my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$frid});
260: if (($brepriv eq '2') || ($brepriv eq 'F')) {
261: my $pprefix='';
262: if ($hash{'src_'.$frid}=~
263: /\.(problem|exam|quiz|assess|survey|form)$/) {
264: $pprefix=&astatus($frid);
265:
266: }
267: if (defined($rows[$sofar])) {
268: $rows[$sofar].='&'.$pprefix.$frid;
269: } else {
270: $rows[$sofar]=$pprefix.$frid;
271: }
272: }
273: }
274: }
275: } else {
276: $sofar++;
277: if ($hash{'src_'.$rid}) {
278: my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$rid});
279: if (($brepriv eq '2') || ($brepriv eq 'F')) {
280: my $pprefix='';
281: if ($hash{'src_'.$rid}=~
282: /\.(problem|exam|quiz|assess|survey|form)$/) {
283: $pprefix=&astatus($rid);
284: }
285: if (defined($rows[$sofar])) {
286: $rows[$sofar].='&'.$pprefix.$rid;
287: } else {
288: $rows[$sofar]=$pprefix.$rid;
289: }
290: }
291: }
292: }
293:
294: if (defined($hash{'to_'.$rid})) {
295: my $mincond=1;
296: my $next='';
297: map {
298: my $thiscond=
299: &Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}});
300: if ($thiscond>=$mincond) {
301: if ($next) {
302: $next.=','.$_.':'.$thiscond;
303: } else {
304: $next=$_.':'.$thiscond;
305: }
306: if ($thiscond>$mincond) { $mincond=$thiscond; }
307: }
308: } split(/\,/,$hash{'to_'.$rid});
309: map {
310: my ($linkid,$condval)=split(/\:/,$_);
311: if ($condval>=$mincond) {
312: my $now=&tracetable($sofar,$hash{'goesto_'.$linkid},$beenhere);
313: if ($now>$further) { $further=$now; }
314: }
315: } split(/\,/,$next);
316:
317: }
318: }
319: return $further;
320: }
321:
322: # ================================================================ Main Handler
323:
324: sub handler {
325: my $r=shift;
326:
327:
328: # ------------------------------------------- Set document type for header only
329:
330: if ($r->header_only) {
331: if ($ENV{'browser.mathml'}) {
332: $r->content_type('text/xml');
333: } else {
334: $r->content_type('text/html');
335: }
336: $r->send_http_header;
337: return OK;
338: }
339:
340: my $requrl=$r->uri;
341: # ----------------------------------------------------------------- Tie db file
342: if ($ENV{'request.course.fn'}) {
343: my $fn=$ENV{'request.course.fn'};
344: if (-e "$fn.db") {
345: if ((tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER,0640)) &&
346: (tie(%parmhash,'GDBM_File',
347: $ENV{'request.course.fn'}.'_parms.db',&GDBM_READER,0640))) {
348: # ------------------------------------------------------------------- Hash tied
349: my $firstres=$hash{'map_start_/res/'.$ENV{'request.course.uri'}};
350: my $lastres=$hash{'map_finish_/res/'.$ENV{'request.course.uri'}};
351: if (($firstres) && ($lastres)) {
352: # ----------------------------------------------------------------- Render page
353: # -------------------------------------------------------------- Set parameters
354:
355:
356: # ---------------------------- initialize coursedata and userdata for this user
357: undef %courseopt;
358: undef %useropt;
359:
360: my $uname=$ENV{'user.name'};
361: my $udom=$ENV{'user.domain'};
362: my $uhome=$ENV{'user.home'};
363: my $cid=$ENV{'request.course.id'};
364: my $chome=$ENV{'course.'.$cid.'.home'};
365: my ($cdom,$cnum)=split(/\_/,$cid);
366:
367: my $userprefix=$uname.'_'.$udom.'_';
368:
369: unless ($uhome eq 'no_host') {
370: # -------------------------------------------------------------- Get coursedata
371: unless
372: ((time-$courserdatas{$cid.'.last_cache'})<240) {
373: my $reply=&Apache::lonnet::reply('dump:'.$cdom.':'.$cnum.
374: ':resourcedata',$chome);
375: if ($reply!~/^error\:/) {
376: $courserdatas{$cid}=$reply;
377: $courserdatas{$cid.'.last_cache'}=time;
378: }
379: }
380: map {
381: my ($name,$value)=split(/\=/,$_);
382: $courseopt{$userprefix.&Apache::lonnet::unescape($name)}=
383: &Apache::lonnet::unescape($value);
384: } split(/\&/,$courserdatas{$cid});
385: # --------------------------------------------------- Get userdata (if present)
386: unless
387: ((time-$userrdatas{$uname.'___'.$udom.'.last_cache'})<240) {
388: my $reply=
389: &Apache::lonnet::reply('dump:'.$udom.':'.$uname.':resourcedata',$uhome);
390: if ($reply!~/^error\:/) {
391: $userrdatas{$uname.'___'.$udom}=$reply;
392: $userrdatas{$uname.'___'.$udom.'.last_cache'}=time;
393: }
394: }
395: map {
396: my ($name,$value)=split(/\=/,$_);
397: $useropt{$userprefix.&Apache::lonnet::unescape($name)}=
398: &Apache::lonnet::unescape($value);
399: } split(/\&/,$userrdatas{$uname.'___'.$udom});
400: }
401:
402: @rows=();
403:
404: &tracetable(0,$firstres,'&'.$lastres.'&');
405: if ($hash{'src_'.$lastres}) {
406: my $brepriv=
407: &Apache::lonnet::allowed('bre',$hash{'src_'.$lastres});
408: if (($brepriv eq '2') || ($brepriv eq 'F')) {
409: $rows[$#rows+1]=''.$lastres;
410: }
411: }
412:
413: # ------------------------------------------------------------------ Page parms
414:
415: my $j;
416: my $i;
417: my $lcm=1;
418: my $contents=0;
419:
420: # ---------------------------------------------- Go through table to get layout
421:
422: for ($i=0;$i<=$#rows;$i++) {
423: if ($rows[$i]) {
424: $contents++;
425: my @colcont=split(/\&/,$rows[$i]);
426: $lcm*=($#colcont+1)/euclid($lcm,($#colcont+1));
427: }
428: }
429:
430:
431: unless ($contents) {
432: $r->content_type('text/html');
433: $r->send_http_header;
434: $r->print('<html><body>Empty Map.</body></html>');
435: } else {
436:
437: # ------------------------------------------------------------------ Build page
438:
439: my $currenturl=$ENV{'form.postdata'};
440: $currenturl=~s/^http\:\/\///;
441: $currenturl=~s/^[^\/]+//;
442:
443: # ---------------------------------------------------------------- Send headers
444:
445: $r->content_type('text/html');
446: $r->send_http_header;
447: $r->print(
448: '<html><head><title>Navigate LON-CAPA Maps</title></head>');
449:
450: $r->print('<body bgcolor="#FFFFFF"');
451: if (($currenturl=~/^\/res/) &&
452: ($currenturl!~/^\/res\/adm/)) {
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: ($currenturl!~/^\/res\/adm/)) {
462: $r->print('<a href="#curloc">Current Location</a><p>');
463: }
464: # ----------------------------------------------------- The little content list
465: for ($i=0;$i<=$#rows;$i++) {
466: if ($rows[$i]) {
467: my @colcont=split(/\&/,$rows[$i]);
468: my $avespan=$lcm/($#colcont+1);
469: for ($j=0;$j<=$#colcont;$j++) {
470: my $rid=$colcont[$j];
471: if ($rid=~/^h(.+)/) {
472: $rid=$1;
473: $r->print(
474: ' <a href="#'.$rid.'">'.$hash{'title_'.$rid}.'</a><br>');
475: }
476: }
477: }
478: }
479: # ----------------------------------------------------------------- Start table
480: $r->print('<hr><table cols="'.$lcm.'" border="0">');
481: for ($i=0;$i<=$#rows;$i++) {
482: if ($rows[$i]) {
483: $r->print("\n<tr>");
484: my @colcont=split(/\&/,$rows[$i]);
485: my $avespan=$lcm/($#colcont+1);
486: for ($j=0;$j<=$#colcont;$j++) {
487: my $rid=$colcont[$j];
488: my $add='<td> ';
489: my $adde='</td>';
490: my $hwk='<font color="#223322">';
491: my $hwke='</font>';
492: if ($rid=~/^h(.+)/) {
493: $rid=$1;
494: $add=
495: '<th bgcolor="#AAFF55"><a name="'.$rid.'">';
496: $adde='</th>';
497: }
498: if ($rid=~/^p(\d)(\d)\"([\w\: \(\)\/\,]*)\"(.+)/) {
499: my $code=$1;
500: my $tcode=$2;
501: my $ctext=$3;
502: $rid=$4;
503: if ($tcode eq '1') {
504: $add='<td bgcolor="#AAAAAA">';
505: }
506: if ($code eq '3') {
507: $add='<td bgcolor="#AAFFAA">';
508: } else {
509: $add='<td bgcolor="#FFAAAA">';
510: if ($tcode eq '2') {
511: $add='<td bgcolor="#FFFFAA">';
512: }
513: if ($tcode eq '4') {
514: $add='<td bgcolor="#FFFF33"><blink>';
515: $adde='</blink></td>';
516: }
517: }
518: $hwk='<font color="#888811"><b>';
519: $hwke='</b></font>';
520: if ($code eq '1') {
521: $hwke='</b> ('.$ctext.')</font>';
522: }
523: if ($code eq '2') {
524: $hwk='<font color="#992222"><b>';
525: $hwke='</b> ('.$ctext.')</font>';
526: }
527: if ($code eq '3') {
528: $hwk='<font color="#229922"><b>';
529: $hwke='</b> ('.$ctext.')</font>';
530: }
531: }
532: if ($hash{'src_'.$rid} eq $currenturl) {
533: $add=$add.'<a name="curloc"></a>'.
534: '<font color=red><b>-> </b></font>';
535: $adde=
536: '<font color=red><b> <-</b></font>'.$adde;
537: }
538: $r->print($add.'<a href="'.$hash{'src_'.$rid}.
539: '">'.$hwk.
540: $hash{'title_'.$rid}.$hwke.'</a>'.$adde);
541: }
542: $r->print('</tr>');
543: }
544: }
545: $r->print("\n</table>");
546: $r->print('</body></html>');
547: # -------------------------------------------------------------------- End page
548: }
549: # ------------------------------------------------------------- End render page
550: } else {
551: $r->content_type('text/html');
552: $r->send_http_header;
553: $r->print('<html><body>Coursemap undefined.</body></html>');
554: }
555: # ------------------------------------------------------------------ Untie hash
556: unless (untie(%hash)) {
557: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
558: "Could not untie coursemap $fn (browse).</font>");
559: }
560: unless (untie(%parmhash)) {
561: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
562: "Could not untie parmhash (browse).</font>");
563: }
564: # -------------------------------------------------------------------- All done
565: return OK;
566: # ----------------------------------------------- Errors, hash could no be tied
567: }
568: }
569: }
570:
571: $ENV{'user.error.msg'}="$requrl:bre:0:0:Course not initialized";
572: return HTTP_NOT_ACCEPTABLE;
573: }
574:
575: 1;
576: __END__
577:
578:
579:
580:
581:
582:
583:
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