Annotation of loncom/interface/lonnavmaps.pm, revision 1.78
1.72 bowersj2 1:
1.2 www 2: # The LearningOnline Network with CAPA
3: # Navigate Maps Handler
1.1 www 4: #
1.78 ! bowersj2 5: # $Id: lonnavmaps.pm,v 1.77 2002/10/14 16:43:58 bowersj2 Exp $
1.20 albertel 6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: #
1.2 www 29: # (Page Handler
1.1 www 30: #
1.2 www 31: # (TeX Content Handler
1.1 www 32: #
1.2 www 33: # 05/29/00,05/30 Gerd Kortemeyer)
34: # 08/30,08/31,09/06,09/14,09/15,09/16,09/19,09/20,09/21,09/23,
35: # 10/02,10/10,10/14,10/16,10/18,10/19,10/31,11/6,11/14,11/16 Gerd Kortemeyer)
1.1 www 36: #
1.17 www 37: # 3/1/1,6/1,17/1,29/1,30/1,2/8,9/21,9/24,9/25 Gerd Kortemeyer
1.21 www 38: # YEAR=2002
39: # 1/1 Gerd Kortemeyer
40: #
1.2 www 41:
1.1 www 42: package Apache::lonnavmaps;
43:
44: use strict;
1.2 www 45: use Apache::Constants qw(:common :http);
46: use Apache::lonnet();
1.18 albertel 47: use Apache::loncommon();
1.2 www 48: use GDBM_File;
1.73 bowersj2 49: use POSIX qw (floor strftime);
1.2 www 50:
51: # -------------------------------------------------------------- Module Globals
52: my %hash;
53: my @rows;
54:
1.10 www 55: #
56: # These cache hashes need to be independent of user, resource and course
57: # (user and course can/should be in the keys)
58: #
59:
60: my %courserdatas;
61: my %userrdatas;
62:
63: #
64: # These global hashes are dependent on user, course and resource,
65: # and need to be initialized every time when a sheet is calculated
66: #
67: my %courseopt;
68: my %useropt;
69: my %parmhash;
70:
1.47 bowersj2 71: # This parameter keeps track of whether obtaining the user's information
72: # failed, which the colorizer in astatus can use
73: my $networkFailedFlag = 0;
74:
1.2 www 75: # ------------------------------------------------------------------ Euclid gcd
76:
77: sub euclid {
78: my ($e,$f)=@_;
79: my $a; my $b; my $r;
80: if ($e>$f) { $b=$e; $r=$f; } else { $r=$e; $b=$f; }
81: while ($r!=0) {
1.51 bowersj2 82: $a=$b; $b=$r;
1.2 www 83: $r=$a%$b;
84: }
85: return $b;
86: }
87:
1.10 www 88: # --------------------------------------------------------------------- Parmval
89:
90: # -------------------------------------------- Figure out a cascading parameter
91: #
92: # For this function to work
93: #
94: # * parmhash needs to be tied
95: # * courseopt and useropt need to be initialized for this user and course
96: #
97:
98: sub parmval {
99: my ($what,$symb)=@_;
100: my $cid=$ENV{'request.course.id'};
101: my $csec=$ENV{'request.course.sec'};
102: my $uname=$ENV{'user.name'};
103: my $udom=$ENV{'user.domain'};
104:
105: unless ($symb) { return ''; }
106: my $result='';
107:
108: my ($mapname,$id,$fn)=split(/\_\_\_/,$symb);
109:
110: # ----------------------------------------------------- Cascading lookup scheme
1.24 albertel 111: my $rwhat=$what;
112: $what=~s/^parameter\_//;
113: $what=~s/\_/\./;
114:
115: my $symbparm=$symb.'.'.$what;
116: my $mapparm=$mapname.'___(all).'.$what;
117: my $usercourseprefix=$uname.'_'.$udom.'_'.$cid;
118:
119: my $seclevel= $usercourseprefix.'.['.$csec.'].'.$what;
120: my $seclevelr=$usercourseprefix.'.['.$csec.'].'.$symbparm;
121: my $seclevelm=$usercourseprefix.'.['.$csec.'].'.$mapparm;
122:
123: my $courselevel= $usercourseprefix.'.'.$what;
124: my $courselevelr=$usercourseprefix.'.'.$symbparm;
125: my $courselevelm=$usercourseprefix.'.'.$mapparm;
126:
127: # ---------------------------------------------------------- first, check user
1.57 albertel 128: if (defined($uname)) {
129: if (defined($useropt{$courselevelr})) { return $useropt{$courselevelr}; }
130: if (defined($useropt{$courselevelm})) { return $useropt{$courselevelm}; }
131: if (defined($useropt{$courselevel})) { return $useropt{$courselevel}; }
1.24 albertel 132: }
1.10 www 133:
1.24 albertel 134: # ------------------------------------------------------- second, check course
1.57 albertel 135: if (defined($csec)) {
136: if (defined($courseopt{$seclevelr})) { return $courseopt{$seclevelr}; }
137: if (defined($courseopt{$seclevelm})) { return $courseopt{$seclevelm}; }
138: if (defined($courseopt{$seclevel})) { return $courseopt{$seclevel}; }
1.24 albertel 139: }
1.10 www 140:
1.57 albertel 141: if (defined($courseopt{$courselevelr})) { return $courseopt{$courselevelr}; }
142: if (defined($courseopt{$courselevelm})) { return $courseopt{$courselevelm}; }
143: if (defined($courseopt{$courselevel})) { return $courseopt{$courselevel}; }
1.10 www 144:
1.24 albertel 145: # ----------------------------------------------------- third, check map parms
1.10 www 146:
1.24 albertel 147: my $thisparm=$parmhash{$symbparm};
1.57 albertel 148: if (defined($thisparm)) { return $thisparm; }
1.10 www 149:
1.24 albertel 150: # ----------------------------------------------------- fourth , check default
1.10 www 151:
1.25 albertel 152: my $default=&Apache::lonnet::metadata($fn,$rwhat.'.default');
1.57 albertel 153: if (defined($default)) { return $default}
1.25 albertel 154:
155: # --------------------------------------------------- fifth , cascade up parts
156:
157: my ($space,@qualifier)=split(/\./,$rwhat);
158: my $qualifier=join('.',@qualifier);
159: unless ($space eq '0') {
1.51 bowersj2 160: my ($part,$id)=split(/\_/,$space);
161: if ($id) {
162: my $partgeneral=&parmval($part.".$qualifier",$symb);
1.57 albertel 163: if (defined($partgeneral)) { return $partgeneral; }
1.51 bowersj2 164: } else {
165: my $resourcegeneral=&parmval("0.$qualifier",$symb);
1.57 albertel 166: if (defined($resourcegeneral)) { return $resourcegeneral; }
1.51 bowersj2 167: }
1.25 albertel 168: }
169: return '';
1.10 www 170: }
171:
172:
173:
1.9 www 174: # ------------------------------------------------------------- Find out status
1.25 albertel 175: # return codes
176: # tcode (timecode)
177: # 1: will open later
178: # 2: is open and not past due yet
179: # 3: is past due date
180: # 4: due in the next 24 hours
181: #
182: # code (curent solved status)
183: # 1: not attempted
184: # 2: attempted but wrong, or incorrect by instructor
185: # 3: solved or correct by instructor
1.29 albertel 186: # 4: partially correct (one or more parts correct)
187: # "excused" needs to be supported, but is not yet.
1.9 www 188: sub astatus {
189: my $rid=shift;
1.29 albertel 190: my $code=0;
1.9 www 191: my $ctext='';
192: $rid=~/(\d+)\.(\d+)/;
1.10 www 193: my $symb=&Apache::lonnet::declutter($hash{'map_id_'.$1}).'___'.$2.'___'.
1.51 bowersj2 194: &Apache::lonnet::declutter($hash{'src_'.$rid});
1.15 www 195: my %duedate=();
196: my %opendate=();
197: my %answerdate=();
1.25 albertel 198: # need to always check part 0's open/due/answer status
1.51 bowersj2 199: foreach (sort(split(/\,/,&Apache::lonnet::metadata($hash{'src_'.$rid},'allpo\ssiblekeys')))) {
1.15 www 200: if ($_=~/^parameter\_(.*)\_opendate$/) {
1.51 bowersj2 201: my $part=$1;
1.15 www 202: $duedate{$part}=&parmval($part.'.duedate',$symb);
203: $opendate{$part}=&parmval($part.'.opendate',$symb);
204: $answerdate{$part}=&parmval($part.'.answerdate',$symb);
1.49 www 205: if (&parmval($part.'.opendate.type',$symb) eq 'date_interval') {
1.51 bowersj2 206: $opendate{$part}=$duedate{$part}-$opendate{$part};
1.49 www 207: }
1.50 www 208: if (&parmval($part.'.answerdate.type',$symb) eq 'date_interval') {
1.49 www 209: $answerdate{$part}=$duedate{$part}+$answerdate{$part};
210: }
1.15 www 211: }
1.25 albertel 212: }
1.11 www 213: my $now=time;
214: my $tcode=0;
1.16 www 215:
216: my %returnhash=&Apache::lonnet::restore($symb);
217:
1.25 albertel 218: foreach (sort(keys(%opendate))) {
1.51 bowersj2 219: my $duedate=$duedate{$_};
220: my $opendate=$opendate{$_};
221: my $answerdate=$answerdate{$_};
222: my $preface='';
223: unless ($_ eq '0') { $preface=' Part: '.$_.' '; }
224: if ($opendate) {
225: if ($now<$duedate || (!$duedate)) {
226: unless ($tcode==4) { $tcode=2; }
227: if ($duedate) {
228: $ctext.=$preface.'Due: '.localtime($duedate);
229: } else {
230: $ctext.=$preface.'No Due Date';
231: }
232: if ($now<$opendate) {
233: unless ($tcode) { $tcode=1; }
234: $ctext.=$preface.'Open: '.localtime($opendate);
235: }
236: if ($duedate && $duedate-$now<86400) {
237: $tcode=4;
238: $ctext.=$preface.'Due: '.localtime($duedate);
239: }
240: } else {
241: unless (($tcode==4) || ($tcode eq 2)) { $tcode=3; }
242: if ($now<$answerdate) {
243: $ctext.='Answer: '.localtime($duedate);
244: }
245: }
246: } else {
247: unless (($tcode==2) || ($tcode==4)) { $tcode=1; }
248: }
249:
250: my $status=$returnhash{'resource.'.$_.'.solved'};
251:
252: if ($status eq 'correct_by_student') {
253: if ($code==0||$code==3) { $code=3; } else { $code=4; }
254: $ctext.=' solved';
255: } elsif ($status eq 'correct_by_override') {
256: if ($code==0||$code==3) { $code=3; } else { $code=4; }
257: $ctext.=' override';
258: } elsif ($status eq 'incorrect_attempted') {
259: if ($code!=4 && $code!=3) { $code=2; }
260: if ($code==3) { $code=4; }
261: $ctext.=' ('.
262: ($returnhash{'resource.'.$_.'.tries'}?
263: $returnhash{'resource.'.$_.'.tries'}:'0');
264: my $numtries = &parmval($_.'.maxtries',$symb);
265: if ($numtries) { $ctext.='/'.$numtries.' tries'; }
266: $ctext.=')';
267: } elsif ($status eq 'incorrect_by_override') {
268: if ($code!=4 && $code!=3) { $code=2; }
269: if ($code==3) { $code=4; }
270: $ctext.=' override';
271: } elsif ($status eq 'excused') {
272: if ($code==0||$code==3) { $code=3; } else { $code=4; }
273: $ctext.=' excused';
274: } else {
275: if ($code==0) { $code=1; }
276: }
1.25 albertel 277: }
1.16 www 278:
1.11 www 279: return 'p'.$code.$tcode.'"'.$ctext.'"';
1.9 www 280: }
281:
1.2 www 282:
1.31 albertel 283: sub addresource {
1.32 albertel 284: my ($resource,$sofar,$rid,$showtypes,$indent,$linkid)=@_;
1.31 albertel 285: if ($showtypes eq 'problems') {
1.51 bowersj2 286: if ($resource!~/\.(problem|exam|quiz|assess|survey|form)$/) {
287: return;
288: }
1.31 albertel 289: }
290: my $brepriv=&Apache::lonnet::allowed('bre',$resource);
291: if ($hash{'src_'.$rid}) {
1.51 bowersj2 292: if (($brepriv eq '2') || ($brepriv eq 'F')) {
293: my $pprefix='';
294: if ($resource=~/\.(problem|exam|quiz|assess|survey|form)$/) {
295: $pprefix=&astatus($rid);
296: }
297: $$sofar++;
298: if ($indent) { $pprefix='i'.$indent.','.$pprefix; }
299: if ($linkid) { $pprefix='l'.$linkid.','.$pprefix; }
300: if (defined($rows[$$sofar])) {
301: $rows[$$sofar].='&'.$pprefix.$rid;
302: } else {
303: $rows[$$sofar]=$pprefix.$rid;
304: }
305: }
1.31 albertel 306: }
307: }
308:
309: sub followlinks () {
1.32 albertel 310: my ($rid,$sofar,$beenhere,$further,$showtypes,$indent,$linkid)=@_;
1.31 albertel 311: my $mincond=1;
312: my $next='';
313: foreach (split(/\,/,$hash{'to_'.$rid})) {
1.51 bowersj2 314: my $thiscond=
315: &Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}});
316: if ($thiscond>=$mincond) {
317: if ($next) {
318: $next.=','.$_.':'.$thiscond;
319: } else {
320: $next=$_.':'.$thiscond;
321: }
322: if ($thiscond>$mincond) { $mincond=$thiscond; }
323: }
1.31 albertel 324: }
1.32 albertel 325: my $col=0;
326: &Apache::lonxml::debug("following links -$next-");
1.31 albertel 327: foreach (split(/\,/,$next)) {
1.51 bowersj2 328: my ($nextlinkid,$condval)=split(/\:/,$_);
329: if ($condval>=$mincond) {
330: my $now=&tracetable($sofar,$hash{'goesto_'.$nextlinkid},
331: $beenhere,$showtypes,$indent,$linkid);
332: if ($now>$further) {
333: if ($col>0) {
334: my $string;
335: for(my $i=0;$i<$col;$i++) { $string.='&'; }
336: for(my $i=$further+1;$now-1>$i;$i++) {
337: $rows[$i]=$string.$rows[$i];
338: }
339: }
340: $further=$now;
341: }
342: }
343: $col++;
1.31 albertel 344: }
345: return $further;
346: }
347: # ------------------------------------------------------------ Build page table
348:
349: sub tracetable {
1.32 albertel 350: my ($sofar,$rid,$beenhere,$showtypes,$indent,$linkid)=@_;
351: my $newshowtypes=$showtypes;
1.31 albertel 352: my $further=$sofar;
1.44 www 353: # $Apache::lonxml::debug=1;
1.32 albertel 354: &Apache::lonxml::debug("$rid ; $linkid ; $sofar ; $beenhere ; ".$hash{'src_'.$rid});
355: if ($beenhere=~/\&$rid\&/) { return $further; }
356: $beenhere.=$rid.'&';
1.31 albertel 357:
358: if (defined($hash{'is_map_'.$rid})) {
1.51 bowersj2 359: $sofar++;
360: my $tprefix='';
361: if ($hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$rid}}}
362: eq 'sequence') {
363: $tprefix='h';
364: } elsif ($hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$rid}}}
365: eq 'page') {
366: $tprefix='j';
367: if ($indent) { $tprefix='i'.$indent.','.$tprefix; }
368: if ($linkid) { $tprefix='l'.$linkid.','.$tprefix; }
369: $newshowtypes='problems';
370: $indent++;
371: #if in a .page continue to link the encompising .page
372: if (!$linkid) { $linkid=$rid; }
373: }
374: if (defined($rows[$sofar])) {
375: $rows[$sofar].='&'.$tprefix.$rid;
376: } else {
377: $rows[$sofar]=$tprefix.$rid;
378: }
379: if ((defined($hash{'map_start_'.$hash{'src_'.$rid}})) &&
380: (defined($hash{'map_finish_'.$hash{'src_'.$rid}}))) {
381: my $frid=$hash{'map_finish_'.$hash{'src_'.$rid}};
382: $sofar=&tracetable($sofar,$hash{'map_start_'.$hash{'src_'.$rid}},
383: '&'.$frid.'&',$newshowtypes,$indent,$linkid);
384: &addresource($hash{'src_'.$frid},\$sofar,$frid,$newshowtypes,
385: $indent,$linkid);
386: if ($tprefix =~ /j$/) { $indent--; $linkid=''; }
387: }
1.31 albertel 388: } else {
1.51 bowersj2 389: &addresource($hash{'src_'.$rid},\$sofar,$rid,$showtypes,
390: $indent,$linkid);
1.31 albertel 391: }
392:
393: if (defined($hash{'to_'.$rid})) {
1.51 bowersj2 394: $further=&followlinks($rid,$sofar,$beenhere,$further,$showtypes,
395: $indent,$linkid);
1.2 www 396: }
1.31 albertel 397:
1.2 www 398: return $further;
399: }
400:
401: # ================================================================ Main Handler
1.1 www 402:
403: sub handler {
1.28 albertel 404: my $r=shift;
1.2 www 405:
1.51 bowersj2 406: &Apache::loncommon::get_unprocessed_cgi($ENV{QUERY_STRING});
407:
408: if ($ENV{'form.jtest'} ne "1")
409: {
410: return new_handle($r);
411: }
1.2 www 412:
413: # ------------------------------------------- Set document type for header only
414:
1.28 albertel 415: if ($r->header_only) {
1.51 bowersj2 416: if ($ENV{'browser.mathml'}) {
417: $r->content_type('text/xml');
418: } else {
419: $r->content_type('text/html');
420: }
421: $r->send_http_header;
422: return OK;
1.28 albertel 423: }
424: my $requrl=$r->uri;
425: my $hashtied;
1.2 www 426: # ----------------------------------------------------------------- Tie db file
1.28 albertel 427: my $fn;
428: if ($ENV{'request.course.fn'}) {
1.51 bowersj2 429: $fn=$ENV{'request.course.fn'};
430: if (-e "$fn.db") {
431: if ((tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER(),0640)) &&
432: (tie(%parmhash,'GDBM_File',
433: $ENV{'request.course.fn'}.'_parms.db',
434: &GDBM_READER(),0640))) {
435: $hashtied=1;
436: }
437: }
1.28 albertel 438: }
439: if (!$hashtied) {
1.51 bowersj2 440: $ENV{'user.error.msg'}="$requrl:bre:0:0:Course not initialized";
441: return HTTP_NOT_ACCEPTABLE;
1.28 albertel 442: }
443:
1.2 www 444: # ------------------------------------------------------------------- Hash tied
1.28 albertel 445:
446: if ($ENV{'browser.mathml'}) {
1.51 bowersj2 447: $r->content_type('text/xml');
1.28 albertel 448: } else {
1.51 bowersj2 449: $r->content_type('text/html');
1.28 albertel 450: }
451: &Apache::loncommon::no_cache($r);
452: $r->send_http_header;
453:
1.42 www 454: my $firstres=$hash{'map_start_'.
455: &Apache::lonnet::clutter($ENV{'request.course.uri'})};
456: my $lastres=$hash{'map_finish_'.
457: &Apache::lonnet::clutter($ENV{'request.course.uri'})};
1.28 albertel 458: if (!(($firstres) && ($lastres))) {
1.51 bowersj2 459: $r->print('<html><body>Coursemap undefined.</body></html>');
1.28 albertel 460: } else {
461:
1.2 www 462: # ----------------------------------------------------------------- Render page
1.10 www 463: # -------------------------------------------------------------- Set parameters
464:
465:
466: # ---------------------------- initialize coursedata and userdata for this user
1.51 bowersj2 467: undef %courseopt;
468: undef %useropt;
1.10 www 469:
1.51 bowersj2 470: my $uname=$ENV{'user.name'};
471: my $udom=$ENV{'user.domain'};
472: my $uhome=$ENV{'user.home'};
473: my $cid=$ENV{'request.course.id'};
474: my $chome=$ENV{'course.'.$cid.'.home'};
475: my ($cdom,$cnum)=split(/\_/,$cid);
476:
477: my $userprefix=$uname.'_'.$udom.'_';
478:
479: unless ($uhome eq 'no_host') {
1.48 bowersj2 480: # ------------------------------------------------- Get coursedata (if present)
1.51 bowersj2 481: unless ((time-$courserdatas{$cid.'.last_cache'})<240) {
482: my $reply=&Apache::lonnet::reply('dump:'.$cdom.':'.$cnum.
483: ':resourcedata',$chome);
484: if ($reply!~/^error\:/) {
485: $courserdatas{$cid}=$reply;
486: $courserdatas{$cid.'.last_cache'}=time;
487: }
488: # check to see if network failed
489: elsif ( $reply=~/no.such.host/i || $reply=~/con.*lost/i )
490: {
491: $networkFailedFlag = 1;
492: }
493: }
494: foreach (split(/\&/,$courserdatas{$cid})) {
495: my ($name,$value)=split(/\=/,$_);
496: $courseopt{$userprefix.&Apache::lonnet::unescape($name)}=
497: &Apache::lonnet::unescape($value);
498: }
1.10 www 499: # --------------------------------------------------- Get userdata (if present)
1.51 bowersj2 500: unless ((time-$userrdatas{$uname.'___'.$udom.'.last_cache'})<240) {
501: my $reply=&Apache::lonnet::reply('dump:'.$udom.':'.$uname.':resourcedata',$uhome);
502: if ($reply!~/^error\:/) {
503: $userrdatas{$uname.'___'.$udom}=$reply;
504: $userrdatas{$uname.'___'.$udom.'.last_cache'}=time;
505: }
506: }
507: foreach (split(/\&/,$userrdatas{$uname.'___'.$udom})) {
508: my ($name,$value)=split(/\=/,$_);
509: $useropt{$userprefix.&Apache::lonnet::unescape($name)}=
510: &Apache::lonnet::unescape($value);
511: }
512: }
1.28 albertel 513:
1.51 bowersj2 514: @rows=();
1.28 albertel 515:
1.51 bowersj2 516: &tracetable(0,$firstres,'&','',0);
1.2 www 517:
518: # ------------------------------------------------------------------ Page parms
519:
1.51 bowersj2 520: my $j;
521: my $i;
522: my $lcm=1;
523: my $contents=0;
1.2 www 524:
525: # ---------------------------------------------- Go through table to get layout
526:
1.51 bowersj2 527: for ($i=0;$i<=$#rows;$i++) {
528: if ($rows[$i]) {
529: &Apache::lonxml::debug("Row $i is:".$rows[$i]);
530: $contents++;
531: my @colcont=split(/\&/,$rows[$i]);
532: $lcm*=($#colcont+1)/euclid($lcm,($#colcont+1));
533: }
534: }
1.5 www 535:
1.2 www 536:
1.51 bowersj2 537: unless ($contents) {
538: $r->print('<html><body>Empty Map.</body></html>');
539: } else {
1.10 www 540:
1.2 www 541: # ------------------------------------------------------------------ Build page
542:
1.51 bowersj2 543: my $currenturl=$ENV{'form.postdata'};
544: $currenturl=~s/^http\:\/\///;
545: $currenturl=~s/^[^\/]+//;
1.13 www 546:
1.2 www 547: # ---------------------------------------------------------------- Send headers
548:
1.51 bowersj2 549: my $date=localtime;
550: my $now=time;
1.21 www 551: # ----------------------------------------- Get email status and discussiontime
552:
1.51 bowersj2 553: my %emailstatus=&Apache::lonnet::dump('email_status');
554: my $logouttime=$emailstatus{'logout'};
555: my $courseleave=$emailstatus{'logout_'.$ENV{'request.course.id'}};
556: my $lastcheck=($courseleave>$logouttime?$courseleave:$logouttime);
557:
558: my %discussiontimes=&Apache::lonnet::dump('discussiontimes',
559: $cdom,$cnum);
560:
561: my %feedback=();
562: my %error=();
563: foreach my $msgid (split(/\&/,&Apache::lonnet::reply('keys:'.
564: $ENV{'user.domain'}.':'.
565: $ENV{'user.name'}.':nohist_email',
566: $ENV{'user.home'}))) {
567: $msgid=&Apache::lonnet::unescape($msgid);
568: my $plain=&Apache::lonnet::unescape(&Apache::lonnet::unescape($msgid));
569: if ($plain=~/(Error|Feedback) \[([^\]]+)\]/) {
570: my ($what,$url)=($1,$2);
571: my %status=
572: &Apache::lonnet::get('email_status',[$msgid]);
573: if ($status{$msgid}=~/^error\:/) {
574: $status{$msgid}='';
575: }
576:
577: if (($status{$msgid} eq 'new') ||
578: (!$status{$msgid})) {
579: if ($what eq 'Error') {
580: $error{$url}.=','.$msgid;
581: } else {
582: $feedback{$url}.=','.$msgid;
583: }
584: }
585: }
586: }
1.22 www 587: # ----------------------------------------------------------- Start Page Output
1.43 www 588: my $bodytagadd='';
1.51 bowersj2 589: $r->print(
1.43 www 590: '<html><head><title>Navigate Course Map</title></head>');
1.51 bowersj2 591: if (($currenturl=~/^\/res/) &&
592: ($currenturl!~/^\/res\/adm/)) {
593: $bodytagadd='onLoad="window.location.hash='."'curloc'".'"';
594: }
595: $r->print(&Apache::loncommon::bodytag('Navigate Course Map','',
1.43 www 596: $bodytagadd));
1.51 bowersj2 597: $r->print('<script>window.focus();</script>');
598: my $desc=$ENV{'course.'.$ENV{'request.course.id'}.'.description'};
599: if (defined($desc)) { $r->print("<h2>$desc</h2>\n"); }
600: $r->print("<h3>$date</h3>\n");
601: $r->rflush();
602: $r->print('<img src="/adm/lonMisc/chat.gif"> New discussion since '.
603: localtime($lastcheck).
604: '<br><img src="/adm/lonMisc/feedback.gif"> New message (click to open)<p>');
605: if (($currenturl=~/^\/res/) &&
606: ($currenturl!~/^\/res\/adm/)) {
607: $r->print('<a href="#curloc">Current Location</a><p>');
608: }
609:
610: # Handle a network error
611:
612: if ($networkFailedFlag)
613: {
614: $r->print('<H2>LON-CAPA network failure.</H2>'."\n");
615: $r->print("<p>LON-CAPA's network is having difficulties, some problem" .
616: " information, such as due dates, will not be available.");
617: }
1.13 www 618: # ----------------------------------------------------- The little content list
1.51 bowersj2 619: for ($i=0;$i<=$#rows;$i++) {
620: if ($rows[$i]) {
621: my @colcont=split(/\&/,$rows[$i]);
622: my $avespan=$lcm/($#colcont+1);
623: for ($j=0;$j<=$#colcont;$j++) {
624: my $rid=$colcont[$j];
625: if ($rid=~/^h(.+)/) {
626: $rid=$1;
627: $r->print(' <a href="#'.
628: $rid.'">'.$hash{'title_'.$rid}.
629: '</a><br>');
630: }
631: }
632: }
633: }
1.2 www 634: # ----------------------------------------------------------------- Start table
1.51 bowersj2 635: $r->print('<hr><table cols="'.$lcm.'" border="0">');
636: for ($i=0;$i<=$#rows;$i++) {
637: if ($rows[$i]) {
638: $r->print("\n<tr>");
639: my @colcont=split(/\&/,$rows[$i]);
640: my $avespan=$lcm/($#colcont+1);
641:
642: # for each item I wish to print on this row...
643: for ($j=0;$j<=$#colcont;$j++) {
644: my $indent;my $indentstr;
645: my $linkid;
646: my $rid=$colcont[$j];
1.36 www 647: $rid=~/(\d+)\.(\d+)$/;
1.51 bowersj2 648: my $src=
649: &Apache::lonnet::declutter($hash{'src_'.$1.'.'.$2});
650: my $symb=
651: &Apache::lonnet::declutter($hash{'map_id_'.$1}).'___'.$2.'___'.$src;
652: my $add='<td>';
653: my $adde='</td>';
654: my $hwk='<font color="#223322">';
655: my $hwke='</font>';
656: if ($rid=~/^l(\d+\.\d+),(.+)/) { $linkid=$1; $rid=$2; }
657: if ($rid=~/^i(\d+),(.+)/) { $indent=$1; $rid=$2; }
658: if ($rid=~/^h(.+)/) {
659: $rid=$1;
660: $add='<th bgcolor="#AAFF55"><a name="'.$rid.'">';
661: $adde='</th>';
1.36 www 662: if (($ENV{'user.adv'}) &&
1.51 bowersj2 663: ($parmhash{$symb.'.0.parameter_randompick'})) {
1.36 www 664: $adde=' (randomly select '.
1.51 bowersj2 665: $parmhash{$symb.'.0.parameter_randompick'}.
1.36 www 666: ')</th>';
667: }
1.51 bowersj2 668: }
669: if ($rid=~/^j(.+)/) { $rid=$1; }
670: if ($rid=~/^p(\d)(\d)\"([\w\: \(\)\/\,]*)\"(.+)/) {
671: # sub astatus describes what code/tcode mean
672: my $code=$1;
673: my $tcode=$2;
674: my $ctext=$3;
675: $rid=$4;
676:
677: # will open later
678: if ($tcode eq '1') {
679: $add='<td bgcolor="#AAAAAA">';
680: }
681:
682: # solved/correct
683: if ($code eq '3') {
684: $add='<td bgcolor="#AAFFAA">';
685: } elsif ($code eq '4') { # partially correct
686: $add='<td bgcolor="#E0FFAA">';
687: } else {
688: # not attempted
689:
690: # we end up here on network failure, so pick a neutral
691: # color if the network failed instead of bright red.
692: if ( $networkFailedFlag )
693: {
694: $add = '<td bgcolor="#AAAAAA">';
695: }
696: else
697: {
698: $add='<td bgcolor="#FFAAAA">';
699: }
700:
701: if ($tcode eq '2') { # open, not past due
702: $add='<td bgcolor="#FFFFAA">';
703: }
704:
705: if ($tcode eq '4') { # due in next 24 hours
706: $add='<td bgcolor="#FFFF33">';
707: $adde='</td>';
708: }
709: }
710: $hwk='<font color="#888811"><b>';
711: $hwke='</b></font>';
712: if ($code eq '1') {
713: $hwke='</b> ('.$ctext.')</font>';
714: }
715: if ($code eq '2' || $code eq '4') {
716: $hwk='<font color="#992222"><b>';
717: $hwke='</b> ('.$ctext.')</font>';
718: }
719: if ($code eq '3') {
720: $hwk='<font color="#229922"><b>';
721: $hwke='</b> ('.$ctext.')</font>';
722: }
723: if ($networkFailedFlag)
724: {
725: $hwke='</b> (status unavailable)</font>';
726: }
727: }
728: if ($rid && $hash{'src_'.$rid} eq $currenturl) {
729: $add=$add.'<a name="curloc"></a>'.
730: '<font color=red size=+2><b>> </b></font>';
731: $adde=
732: '<font color=red size=+2><b> <</b></font>'.$adde;
733: }
734: if ($discussiontimes{$symb}>$lastcheck) {
735: $adde=
736: '<img border=0 src="/adm/lonMisc/chat.gif">'.
737: $adde;
738: }
739: if ($error{$src}) {
740: foreach (split(/\,/,$error{$src})) {
741: if ($_) {
742: $adde=
743: ' <a href="/adm/email?display='.
744: &Apache::lonnet::escape($_).
745: '"><img src="/adm/lonMisc/bomb.gif" border=0></a>'
746: .$adde;
747: }
748: }
749: }
750: if ($feedback{$src}) {
751: foreach (split(/\,/,$feedback{$src})) {
752: if ($_) {
753: $adde=
754: ' <a href="/adm/email?display='.
755: &Apache::lonnet::escape($_).
756: '"><img src="/adm/lonMisc/feedback.gif" border=0></a>'
757: .$adde;
758: }
759: }
760: }
761: if ($indent) {
762: my $is=" ";
763: for(my $i=-1;$i<$indent;$i++) { $indentstr.=$is; }
764: }
765: if (!$linkid) { $linkid=$rid; }
1.38 www 766: if ($hash{'randomout_'.$rid}) {
767: $adde=' <i>(hidden)</i>'.$adde;
768: }
1.51 bowersj2 769: $r->print($add.$indentstr);
770: if ($rid) {
771: $r->print('<a href="'.$hash{'src_'.$linkid}.
1.39 www 772: (($hash{'src_'.$linkid}=~/\?/)?'&':'?').
773: 'symb='.&Apache::lonnet::escape($symb)
1.35 www 774: .'">'.
1.51 bowersj2 775: $hwk.$hash{'title_'.$rid}.$hwke.'</a>');
776: }
777: $r->print($adde);
778: }
779: $r->print('</tr>');
780: }
781: }
782: $r->print("\n</table>");
783: $r->print('</body></html>');
1.2 www 784: # -------------------------------------------------------------------- End page
1.51 bowersj2 785: }
1.2 www 786: # ------------------------------------------------------------- End render page
1.28 albertel 787: }
1.2 www 788: # ------------------------------------------------------------------ Untie hash
1.28 albertel 789: unless (untie(%hash)) {
1.51 bowersj2 790: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
791: "Could not untie coursemap $fn (browse).</font>");
1.28 albertel 792: }
793: unless (untie(%parmhash)) {
1.51 bowersj2 794: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
795: "Could not untie parmhash (browse).</font>");
1.28 albertel 796: }
797: return OK;
1.2 www 798: }
1.1 www 799:
1.51 bowersj2 800: sub new_handle {
801: my $r = shift;
802:
803: # Handle header-only request
804: if ($r->header_only) {
805: if ($ENV{'browser.mathml'}) {
806: $r->content_type('text/xml');
807: } else {
808: $r->content_type('text/html');
809: }
810: $r->send_http_header;
811: return OK;
812: }
813:
814: # Send header, don't cache this page
815: if ($ENV{'browser.mathml'}) {
816: $r->content_type('text/xml');
817: } else {
818: $r->content_type('text/html');
819: }
820: &Apache::loncommon::no_cache($r);
821: $r->send_http_header;
822:
823: # Initialize the nav map
824: my $navmap = Apache::lonnavmaps::navmap->new(
825: $ENV{"request.course.fn"}.".db",
826: $ENV{"request.course.fn"}."_parms.db", 1);
827:
1.55 bowersj2 828:
829: if (!defined($navmap)) {
830: my $requrl = $r->uri;
831: $ENV{'user.error.msg'} = "$requrl:bre:0:0:Course not initialized";
832: return HTTP_NOT_ACCEPTABLE;
833: }
1.64 bowersj2 834:
835: # Header
836: $r->print(&Apache::loncommon::bodytag('Navigate Course Map','',
837: ''));
838: $r->print('<script>window.focus();</script>');
839: my $desc=$ENV{'course.'.$ENV{'request.course.id'}.'.description'};
840: if (defined($desc)) { $r->print("<h2>$desc</h2>\n"); }
841: my $date=localtime;
842: $r->print("<h3>$date</h3>\n");
843: $r->rflush();
1.65 bowersj2 844: if ($navmap->{LAST_CHECK}) {
1.66 bowersj2 845: $r->print('<img src="/adm/lonMisc/chat.gif"> New discussion since '.
1.73 bowersj2 846: strftime("%A, %b %e at %I:%M %P", localtime($navmap->{LAST_CHECK})).
1.66 bowersj2 847: '<br><img src="/adm/lonMisc/feedback.gif"> New message (click to open)<p>');
1.65 bowersj2 848: } else {
1.66 bowersj2 849: $r->print('<img src="/adm/lonMisc/chat.gif"> Discussions'.
850: '<br><img src="/adm/lonMisc/feedback.gif"> New message (click to open)<p>');
1.65 bowersj2 851: }
1.64 bowersj2 852: #if (($currenturl=~/^\/res/) &&
853: # ($currenturl!~/^\/res\/adm/)) {
854: # $r->print('<a href="#curloc">Current Location</a><p>');
855: #}
1.55 bowersj2 856:
857: # Check that it's defined
858: if (!($navmap->courseMapDefined())) {
859: $r->print('<font size="+2" color="red">Coursemap undefined.</font>' .
860: '</body></html>');
861: return OK;
862: }
863:
1.51 bowersj2 864: # Grab a resource object so we have access to the constants; this
865: # is technically not proper, but should be harmless
866: my $res = $navmap->firstResource();
867:
868: # Defines a status->color mapping, null string means don't color
869: my %colormap =
1.54 bowersj2 870: ( $res->NETWORK_FAILURE => '',
1.59 bowersj2 871: $res->CORRECT => '',
1.54 bowersj2 872: $res->EXCUSED => '#BBBBFF',
1.59 bowersj2 873: $res->PAST_DUE_ANSWER_LATER => '',
874: $res->PAST_DUE_NO_ANSWER => '',
875: $res->ANSWER_OPEN => '#CCFFCC',
1.54 bowersj2 876: $res->OPEN_LATER => '',
1.59 bowersj2 877: $res->TRIES_LEFT => '',
878: $res->INCORRECT => '',
879: $res->OPEN => '',
1.54 bowersj2 880: $res->NOTHING_SET => '' );
1.59 bowersj2 881: # And a special case in the nav map; what to do when the assignment
882: # is not yet done and due in less then 24 hours
883: my $hurryUpColor = "#FFCCCC";
884:
885: my %statusIconMap =
1.66 bowersj2 886: ( $res->NETWORK_FAILURE => '',
887: $res->NOTHING_SET => '',
888: $res->CORRECT => 'navmap.correct.gif',
889: $res->EXCUSED => 'navmap.correct.gif',
890: $res->PAST_DUE_NO_ANSWER => 'navmap.wrong.gif',
891: $res->PAST_DUE_ANSWER_LATER => 'navmap.wrong.gif',
892: $res->ANSWER_OPEN => 'navmap.wrong.gif',
893: $res->OPEN_LATER => '',
894: $res->TRIES_LEFT => 'navmap.open.gif',
895: $res->INCORRECT => 'navmap.wrong.gif',
1.69 bowersj2 896: $res->OPEN => 'navmap.open.gif',
897: $res->ATTEMPTED => '' );
898:
899: my %iconAltTags =
900: ( 'navmap.correct.gif' => 'Correct',
901: 'navmap.wrong.gif' => 'Incorrect',
902: 'navmap.open.gif' => 'Open' );
1.59 bowersj2 903:
904: my %condenseStatuses =
1.66 bowersj2 905: ( $res->NETWORK_FAILURE => 1,
906: $res->NOTHING_SET => 1,
907: $res->CORRECT => 1 );
1.51 bowersj2 908:
909: my %filterHash;
910: # Figure out what we're not displaying
911: foreach (split(/\,/, $ENV{"form.filter"})) {
912: if ($_) {
913: $filterHash{$_} = "1";
914: }
915: }
916:
1.63 bowersj2 917: my $currenturl = $ENV{'form.postdata'};
918: $currenturl=~s/^http\:\/\///;
919: $currenturl=~s/^[^\/]+//;
1.75 bowersj2 920: # alreadyHere allows us to only open the maps necessary to view
921: # the current location once, while at the same time remembering
922: # the current location. Without that check, the user would never
923: # be able to close those maps; the user would close it, and the
924: # currenturl scan would re-open it.
925: my $queryAdd = "postdata=" . &Apache::lonnet::escape($currenturl) .
926: "&alreadyHere=1";
1.63 bowersj2 927:
1.66 bowersj2 928: $r->print('<a href="navmaps?condition=1&filter=">Show All Resources</a><br /><br />');
1.63 bowersj2 929:
1.51 bowersj2 930: # Begin the HTML table
1.59 bowersj2 931: # four cols: resource + indent, chat+feedback, icon, text string
1.51 bowersj2 932: $r->print('<table cellspacing="3" cellpadding="0" bgcolor="#FFFFFF">' ."\n");
933:
1.66 bowersj2 934: my $condition = 0;
935: if ($ENV{'form.condition'}) {
1.68 bowersj2 936: $condition = 1;
1.66 bowersj2 937: }
938:
1.74 bowersj2 939: # This needs to be updated to use symbs from the remote,
940: # instead of uris. The changes to this and the main rendering
941: # loop should be obvious.
942: # Here's a simple example of the iterator.
943: # If there is a current resource
1.75 bowersj2 944: if ($currenturl && !$ENV{'form.alreadyHere'}) {
1.74 bowersj2 945: # Give me every resource...
946: my $mapIterator = $navmap->getIterator(undef, undef, {}, 1);
947: my $found != 0;
948: my $depth = 1;
949: $mapIterator->next(); # discard the first BEGIN_MAP
950: my $curRes = $mapIterator->next();
951:
952: while ($depth > 0 && !$found) {
953: if (ref($curRes) && $curRes->src() eq $currenturl) {
954: # If this is the correct resource, be sure to
955: # show it by making sure the containing maps
956: # are open.
957:
958: my $mapStack = $mapIterator->getStack();
959: for my $map (@{$mapStack}) {
960: if ($condition) {
961: undef $filterHash{$map->map_pc()};
962: } else {
963: $filterHash{$map->map_pc()} = 1;
964: }
965: }
966: $found = 1;
967: }
968: $curRes = $mapIterator->next();
969: }
970: }
971:
1.53 bowersj2 972: undef $res; # so we don't accidentally use it later
1.72 bowersj2 973: my $indentLevel = 0;
1.61 bowersj2 974: my $indentString = "<img src=\"/adm/lonIcons/whitespace1.gif\" width=\"25\" height=\"1\" alt=\"\" border=\"0\" />";
1.51 bowersj2 975:
976: my $isNewBranch = 0;
1.59 bowersj2 977: my $now = time();
978: my $in24Hours = $now + 24 * 60 * 60;
1.72 bowersj2 979: my $depth = 1;
1.78 ! bowersj2 980: my $displayedHereMarker = 0;
1.72 bowersj2 981:
982: # We know the first thing is a BEGIN_MAP (see "$self->{STARTED}"
983: # code in iterator->next), so ignore the first one
1.74 bowersj2 984: my $mapIterator = $navmap->getIterator(undef, undef, \%filterHash,
985: $condition);
1.72 bowersj2 986: $mapIterator->next();
987: my $curRes = $mapIterator->next();
1.51 bowersj2 988:
1.72 bowersj2 989: while ($depth > 0) {
1.51 bowersj2 990: if ($curRes == $mapIterator->BEGIN_MAP() ||
1.52 bowersj2 991: $curRes == $mapIterator->BEGIN_BRANCH()) {
1.51 bowersj2 992: $indentLevel++;
993: }
994: if ($curRes == $mapIterator->END_MAP() ||
1.52 bowersj2 995: $curRes == $mapIterator->END_BRANCH()) {
1.51 bowersj2 996: $indentLevel--;
997: }
1.52 bowersj2 998: if ($curRes == $mapIterator->BEGIN_BRANCH()) {
999: $isNewBranch = 1;
1.72 bowersj2 1000: }
1001: if ($curRes == $mapIterator->BEGIN_MAP()) {
1002: $depth++;
1003: }
1004: if ($curRes == $mapIterator->END_MAP()) {
1005: $depth--;
1.51 bowersj2 1006: }
1007:
1.68 bowersj2 1008: # Is this resource being blotted out?
1009: if (ref($curRes) && !advancedUser() && $curRes->randomout()) {
1010: $curRes = $mapIterator->next();
1011: next; # and totally ignore this resource
1012: }
1013:
1.51 bowersj2 1014: if (ref($curRes) && $curRes->src()) {
1015:
1.66 bowersj2 1016: # Step one: Decide which parts to show
1017: my @parts = @{$curRes->parts()};
1018: my $multipart = scalar(@parts) > 1;
1019: my $condensed = 0;
1020:
1.51 bowersj2 1021: if ($curRes->is_problem()) {
1.66 bowersj2 1022: # Is it multipart?
1.59 bowersj2 1023:
1.66 bowersj2 1024: if ($multipart) {
1025: # If it's multipart, see if part 0 is "open"
1026: # if it is, display all parts, if it isn't,
1027: # just display first
1028: if (!$curRes->opendate("0")) {
1029: @parts = ("0"); # just display the zero-th part
1.68 bowersj2 1030: $condensed = 1;
1.66 bowersj2 1031: } else {
1032: # Otherwise, only display part 0 if we want to
1033: # attach feedback or email information to it
1034: if ($curRes->hasDiscussion() || $curRes->getFeedback()) {
1035: shift @parts;
1036: } else {
1037: # If there's discussion or feedback, that counts
1038: # as a difference, so display the parts.
1039:
1040: # Now, we decide whether to condense the
1041: # parts due to similarity
1042: my $status = $curRes->status($parts[1]);
1043: my $due = $curRes->duedate($parts[1]);
1044: my $open = $curRes->opendate($parts[1]);
1045: my $statusAllSame = 1;
1046: my $dueAllSame = 1;
1047: my $openAllSame = 1;
1048: for (my $i = 2; $i < scalar(@parts); $i++) {
1049: if ($curRes->status($parts[$i]) != $status){
1050: $statusAllSame = 0;
1051: }
1052: if ($curRes->duedate($parts[$i]) != $due ) {
1053: $dueAllSame = 0;
1054: }
1055: if ($curRes->opendate($parts[$i]) != $open) {
1056: $openAllSame = 0;
1057: }
1058: }
1059:
1060: # $allSame is true if all the statuses were
1061: # the same. Now, if they are all the same and
1062: # match one of the statuses to condense, or they
1063: # are all open with the same due date, or they are
1064: # all OPEN_LATER with the same open date, display the
1065: # status of the first non-zero part (to get the 'correct'
1066: # status right, since 0 is never 'correct' or 'open').
1067: if (($statusAllSame && defined($condenseStatuses{$status})) ||
1068: ($dueAllSame && $status == $curRes->OPEN && $statusAllSame)||
1069: ($openAllSame && $status == $curRes->OPEN_LATER && $statusAllSame) ){
1070: @parts = ($parts[1]);
1071: $condensed = 1;
1072: }
1073: }
1074: }
1075: }
1.59 bowersj2 1076:
1.51 bowersj2 1077: } else {
1078: @parts[0] = "0"; # this is to get past foreach loop below
1079: # you can consider a non-problem resource as a resource
1.77 bowersj2 1080: # with only one part without loss
1.51 bowersj2 1081: }
1082:
1.66 bowersj2 1083: # Display one part, in event of network error.
1084: # If this is a single part, we can at least show the correct
1085: # status, but if it's multipart, we're lost.
1086: if ($curRes->{RESOURCE_ERROR}) {
1087: @parts = ("0");
1088: }
1089:
1090: # Step two: Show the parts
1.51 bowersj2 1091: foreach my $part (@parts) {
1.59 bowersj2 1092:
1.66 bowersj2 1093: my $deltalevel = 0; # for inserting the branch icon
1.68 bowersj2 1094: my $nonLinkedText = ""; # unlinked stuff after title
1.51 bowersj2 1095:
1096: # For each thing we're displaying...
1097:
1098: my $stack = $mapIterator->getStack();
1099: my $src = getLinkForResource($stack);
1100:
1101: my $srcHasQuestion = $src =~ /\?/;
1102: my $link = $src.
1103: ($srcHasQuestion?'&':'?') .
1104: 'symb='.&Apache::lonnet::escape($curRes->symb()).
1105: '"';
1106: my $title = $curRes->title();
1107: my $partLabel = "";
1.52 bowersj2 1108: my $newBranchText = "";
1109:
1110: # If this is a new branch, label it so
1111: # (temporary, this should be an icon w/ alt text)
1112: if ($isNewBranch) {
1.59 bowersj2 1113: $newBranchText = "<img src=\"/adm/lonIcons/branch.gif\" border=\"0\">";
1.52 bowersj2 1114: $isNewBranch = 0;
1.66 bowersj2 1115: $deltalevel = 1;
1.52 bowersj2 1116: }
1.51 bowersj2 1117:
1118: # links to open and close the folders
1119: my $linkopen = "<a href=\"$link\">";
1120: my $linkclose = "</a>";
1121:
1.61 bowersj2 1122: my $icon = "<img src=\"/adm/lonIcons/html.gif\" alt=\"\" border=\"0\" />";
1.51 bowersj2 1123: if ($curRes->is_problem()) {
1.66 bowersj2 1124: if ($part eq "0" || $condensed) {
1125: $icon = '<img src="/adm/lonIcons/problem.gif" alt="" border=\"0\" />';
1126: } else {
1127: $icon = $indentString;
1128: }
1.51 bowersj2 1129: }
1130:
1131: # Display the correct icon, link to open or shut map
1132: if ($curRes->is_map()) {
1133: my $mapId = $curRes->map_pc();
1134: my $nowOpen = !defined($filterHash{$mapId});
1135: $icon = $nowOpen ?
1.77 bowersj2 1136: "navmap.folder.closed.gif" : "navmap.folder.open.gif";
1.66 bowersj2 1137: $icon = "<img src=\"/adm/lonIcons/$icon\" alt=\"\" border=\"0\" />";
1.52 bowersj2 1138: $linkopen = "<a href=\"/adm/navmaps?filter=";
1.66 bowersj2 1139: $linkopen .= ($nowOpen xor $condition) ?
1.51 bowersj2 1140: addToFilter(\%filterHash, $mapId) :
1141: removeFromFilter(\%filterHash, $mapId);
1.66 bowersj2 1142: $linkopen .= "&condition=$condition&$queryAdd\">";
1.51 bowersj2 1143: $linkclose = "</a>";
1.68 bowersj2 1144:
1.51 bowersj2 1145: }
1146:
1147: my $colorizer = "";
1148: if ($curRes->is_problem()) {
1149: my $status = $curRes->status($part);
1150: my $color = $colormap{$status};
1.74 bowersj2 1151:
1152: # Special case in the navmaps: If in less then
1153: # 24 hours, give it a bit of urgency
1.76 bowersj2 1154: if ($status == $curRes->OPEN() && $curRes->duedate() &&
1155: $curRes->duedate() < time()+(24*60*60) &&
1156: $curRes->duedate() > time()) {
1.74 bowersj2 1157: $color = $hurryUpColor;
1158: }
1.51 bowersj2 1159: if ($color ne "") {
1160: $colorizer = "bgcolor=\"$color\"";
1161: }
1162: }
1163:
1.68 bowersj2 1164: if ($curRes->randomout()) {
1165: $nonLinkedText .= ' <i>(hidden)</i> ';
1166: }
1167:
1.66 bowersj2 1168: # FIRST COL: The resource indentation, branch icon, and name
1.77 bowersj2 1169: $r->print(" <tr><td align=\"left\" valign=\"center\">\n");
1.51 bowersj2 1170:
1171: # print indentation
1.59 bowersj2 1172: for (my $i = 0; $i < $indentLevel - $deltalevel; $i++) {
1.51 bowersj2 1173: $r->print($indentString);
1174: }
1175:
1.61 bowersj2 1176: $r->print(" ${newBranchText}${linkopen}$icon${linkclose}\n");
1.51 bowersj2 1177:
1.74 bowersj2 1178: my $curMarkerBegin = "";
1179: my $curMarkerEnd = "";
1180:
1181: # Is this the current resource?
1.78 ! bowersj2 1182: if ($curRes->src() eq $currenturl && !$displayedHereMarker) {
1.74 bowersj2 1183: $curMarkerBegin = '<a name="curloc" /><font color="red" size="+2">> </font>';
1184: $curMarkerEnd = '<font color="red" size="+2"> <</font>';
1.78 ! bowersj2 1185: $displayedHereMarker = 1;
1.74 bowersj2 1186: }
1187:
1.69 bowersj2 1188: if ($curRes->is_problem() && $part ne "0" && !$condensed) {
1.66 bowersj2 1189: $partLabel = " (Part $part)";
1190: $title = "";
1191: }
1192: if ($multipart && $condensed) {
1.68 bowersj2 1193: $nonLinkedText .= ' (' . $curRes->countParts() . ' parts)';
1.66 bowersj2 1194: }
1.59 bowersj2 1195:
1.74 bowersj2 1196: $r->print(" $curMarkerBegin<a href=\"$link\">$title$partLabel</a> $curMarkerEnd $nonLinkedText");
1.66 bowersj2 1197:
1198: if ($curRes->{RESOURCE_ERROR}) {
1199: $r->print(&Apache::loncommon::help_open_topic ("Navmap_Host_Down",
1200: '<font size="-1">Host down</font>'));
1201: }
1202:
1203: my $discussionHTML = ""; my $feedbackHTML = "";
1204:
1205: # SECOND COL: Is there text or feedback?
1206: if ($curRes->hasDiscussion()) {
1207: $discussionHTML = $linkopen .
1208: '<img border="0" src="/adm/lonMisc/chat.gif" />' .
1209: $linkclose;
1210: }
1211:
1212: if ($curRes->getFeedback()) {
1213: my $feedback = $curRes->getFeedback();
1214: foreach (split(/\,/, $feedback)) {
1215: if ($_) {
1216: $feedbackHTML .= ' <a href="/adm/email?display='
1217: . &Apache::lonnet::escape($_) . '">'
1218: . '<img src="/adm/lonMisc/feedback.gif" '
1219: . 'border="0" /></a>';
1220: }
1221: }
1222: }
1223:
1.77 bowersj2 1224: $r->print("<td align=\"left\" valign=\"center\">$discussionHTML$feedbackHTML</td>");
1.66 bowersj2 1225:
1226: # Is this the first displayed part of a multi-part problem
1227: # that has not been condensed, so we should suppress these two
1228: # columns?
1229: my $firstDisplayed = !$condensed && $multipart && $part eq "0";
1230:
1.69 bowersj2 1231: # THIRD COL: Problem status icon
1.66 bowersj2 1232: if ($curRes->is_problem() &&
1233: !$firstDisplayed) {
1234: my $icon = $statusIconMap{$curRes->status($part)};
1.69 bowersj2 1235: my $alt = $iconAltTags{$icon};
1.66 bowersj2 1236: if ($icon) {
1.77 bowersj2 1237: $r->print("<td valign=\"center\" width=\"50\" align=\"right\">$linkopen<img src=\"/adm/lonIcons/$icon\" border=\"0\" alt=\"$alt\" />$linkclose</td>\n");
1.66 bowersj2 1238: } else {
1239: $r->print("<td></td>\n");
1240: }
1241: } else { # not problem, no icon
1242: $r->print("<td></td>\n");
1243: }
1244:
1.69 bowersj2 1245: # FOURTH COL: Text description
1.77 bowersj2 1246: $r->print("<td $colorizer align=\"right\" valign=\"center\">\n");
1.51 bowersj2 1247:
1.61 bowersj2 1248: if ($curRes->kind() eq "res" &&
1249: $curRes->is_problem() &&
1.66 bowersj2 1250: !$firstDisplayed) {
1.53 bowersj2 1251: $r->print (getDescription($curRes, $part));
1.51 bowersj2 1252: }
1.68 bowersj2 1253: if ($curRes->is_map() && advancedUser() && $curRes->randompick()) {
1254: $r->print('(randomly select ' . $curRes->randompick() .')');
1255: }
1.59 bowersj2 1256:
1.66 bowersj2 1257: $r->print("</td></tr>\n");
1.51 bowersj2 1258: }
1259: }
1260: $curRes = $mapIterator->next();
1261: }
1262:
1263: $r->print("</table></body></html>");
1264:
1.59 bowersj2 1265: $navmap->untieHashes();
1266:
1.51 bowersj2 1267: return OK;
1268: }
1269:
1270: # Convenience functions: Returns a string that adds or subtracts
1271: # the second argument from the first hash, appropriate for the
1272: # query string that determines which folders to recurse on
1273: sub addToFilter {
1274: my $hashIn = shift;
1275: my $addition = shift;
1276: my %hash = %$hashIn;
1277: $hash{$addition} = 1;
1278:
1279: return join (",", keys(%hash));
1280: }
1281:
1282: sub removeFromFilter {
1283: my $hashIn = shift;
1284: my $subtraction = shift;
1285: my %hash = %$hashIn;
1286:
1287: delete $hash{$subtraction};
1288: return join(",", keys(%hash));
1289: }
1290:
1291: # Convenience function: Given a stack returned from getStack on the iterator,
1292: # return the correct src() value.
1293: # Later, this should add an anchor when we start putting anchors in pages.
1294: sub getLinkForResource {
1295: my $stack = shift;
1296: my $res;
1297:
1298: # Check to see if there are any pages in the stack
1299: foreach $res (@$stack) {
1300: if (defined($res) && $res->is_page()) {
1301: return $res->src();
1302: }
1303: }
1304:
1305: # Failing that, return the src of the last resource that is defined
1306: # (when we first recurse on a map, it puts an undefined resource
1307: # on the bottom because $self->{HERE} isn't defined yet, and we
1308: # want the src for the map anyhow)
1309: foreach (@$stack) {
1310: if (defined($_)) { $res = $_; }
1311: }
1312:
1313: return $res->src();
1314: }
1315:
1.53 bowersj2 1316: # Convenience function: This seperates the logic of how to create
1317: # the problem text strings ("Due: DATE", "Open: DATE", "Not yet assigned",
1318: # etc.) into a seperate function. It takes a resource object as the
1319: # first parameter, and the part number of the resource as the second.
1320: # It's basically a big switch statement on the status of the resource.
1321:
1322: sub getDescription {
1323: my $res = shift;
1324: my $part = shift;
1.69 bowersj2 1325: my $status = $res->status($part);
1.53 bowersj2 1326:
1327: if ($status == $res->NETWORK_FAILURE) { return ""; }
1328: if ($status == $res->NOTHING_SET) {
1329: return "Not currently assigned.";
1330: }
1331: if ($status == $res->OPEN_LATER) {
1.73 bowersj2 1332: return "Open " . timeToHumanString($res->opendate($part));
1.53 bowersj2 1333: }
1334: if ($status == $res->OPEN) {
1.66 bowersj2 1335: if ($res->duedate()) {
1.73 bowersj2 1336: return "Due " . timeToHumanString($res->duedate($part));
1.66 bowersj2 1337: } else {
1338: return "Open, no due date";
1339: }
1.53 bowersj2 1340: }
1.54 bowersj2 1341: if ($status == $res->PAST_DUE_ANSWER_LATER) {
1.73 bowersj2 1342: return "Answer open " . timeToHumanString($res->answerdate($part));
1.54 bowersj2 1343: }
1344: if ($status == $res->PAST_DUE_NO_ANSWER) {
1.73 bowersj2 1345: return "Was due " . timeToHumanString($res->duedate($part));
1.53 bowersj2 1346: }
1347: if ($status == $res->ANSWER_OPEN) {
1348: return "Answer available";
1349: }
1.59 bowersj2 1350: if ($status == $res->EXCUSED) {
1.66 bowersj2 1351: return "Excused by instructor";
1.59 bowersj2 1352: }
1.69 bowersj2 1353: if ($status == $res->ATTEMPTED) {
1354: return "Not yet graded.";
1355: }
1.59 bowersj2 1356: if ($status == $res->TRIES_LEFT) {
1.66 bowersj2 1357: my $tries = $res->tries();
1358: my $maxtries = $res->maxtries();
1359: my $triesString = "($tries of $maxtries tries used)";
1360: if ($res->duedate()) {
1.73 bowersj2 1361: return "Due " . timeToHumanString($res->duedate($part)) .
1.66 bowersj2 1362: " $triesString";
1363: } else {
1364: return "No due date $triesString";
1365: }
1.59 bowersj2 1366: }
1.53 bowersj2 1367: }
1368:
1.68 bowersj2 1369: sub advancedUser {
1370: return $ENV{'user.adv'};
1371: }
1372:
1.73 bowersj2 1373:
1374: # timeToHumanString takes a time number and converts it to a
1375: # human-readable representation, meant to be used in the following
1376: # manner:
1377: # print "Due $timestring"
1378: # print "Open $timestring"
1379: # print "Answer available $timestring"
1380: # Very, very, very, VERY English-only... goodness help a localizer on
1381: # this func...
1.53 bowersj2 1382: sub timeToHumanString {
1.58 albertel 1383: my ($time) = @_;
1384: # zero, '0' and blank are bad times
1.73 bowersj2 1385: if (!$time) {
1386: return 'never';
1387: }
1388:
1389: my $now = time();
1390:
1391: my @time = localtime($time);
1392: my @now = localtime($now);
1393:
1394: # Positive = future
1395: my $delta = $time - $now;
1396:
1397: my $minute = 60;
1398: my $hour = 60 * $minute;
1399: my $day = 24 * $hour;
1400: my $week = 7 * $day;
1401: my $inPast = 0;
1402:
1403: # Logic in comments:
1404: # Is it now? (extremely unlikely)
1405: if ( $delta == 0 ) {
1406: return "this instant";
1407: }
1408:
1409: if ($delta < 0) {
1410: $inPast = 1;
1411: $delta = -$delta;
1412: }
1413:
1414: # Is it in the future?
1415: if ( $delta > 0 ) {
1416: # Is it less then a minute away?
1417: my $tense = $inPast ? " ago" : "";
1418: my $prefix = $inPast ? "" : "in ";
1419: if ( $delta < $minute ) {
1420: if ($delta == 1) { return "${prefix}1 second$tense"; }
1421: return "$prefix$delta seconds$tense";
1422: }
1423:
1424: # Is it less then an hour away?
1425: if ( $delta < $hour ) {
1426: # If so, use minutes
1427: my $minutes = floor($delta / 60);
1428: if ($minutes == 1) { return "${prefix}1 minute$tense"; }
1429: return "$prefix$minutes minutes$tense";
1430: }
1431:
1432: # Is it less then 24 hours away? If so,
1433: # display hours + minutes
1434: if ( $delta < $hour * 24) {
1435: my $hours = floor($delta / $hour);
1436: my $minutes = floor(($delta % $hour) / $minute);
1437: my $hourString = "$hours hours";
1438: my $minuteString = ", $minutes minutes";
1439: if ($hours == 1) {
1440: $hourString = "1 hour";
1441: }
1442: if ($minutes == 1) {
1443: $minuteString = ", 1 minute";
1444: }
1445: if ($minutes == 0) {
1446: $minuteString = "";
1447: }
1448: return "$prefix$hourString$minuteString$tense";
1449: }
1450:
1451: # Less then 5 days away, display day of the week and
1452: # HH:MM
1453: if ( $delta < $day * 5 ) {
1454: my $timeStr = strftime("%A at %I:%M %P", localtime($time));
1455: $timeStr =~ s/12:00 am/midnight/;
1456: $timeStr =~ s/12:00 pm/noon/;
1457: return ($inPast ? "last " : "next ") .
1458: $timeStr;
1459: }
1460:
1461: # Is it this year?
1462: if ( $time[5] == $now[5]) {
1463: # Return on Month Day, HH:MM meridian
1464: my $timeStr = strftime("on %A, %b %e at %I:%M %P", localtime($time));
1465: $timeStr =~ s/12:00 am/midnight/;
1466: $timeStr =~ s/12:00 pm/noon/;
1467: return $timeStr;
1468: }
1469:
1470: # Not this year, so show the year
1471: my $timeStr = strftime("on %A, %b %e %G at %I:%M %P", localtime($time));
1472: $timeStr =~ s/12:00 am/midnight/;
1473: $timeStr =~ s/12:00 pm/noon/;
1474: return $timeStr;
1.58 albertel 1475: }
1.53 bowersj2 1476: }
1477:
1.51 bowersj2 1478: 1;
1479:
1480: package Apache::lonnavmaps::navmap;
1481:
1482: =pod
1483:
1484: lonnavmaps provides functions and objects for dealing with the compiled course hashes generated when a user enters the course, and also provides the Apache handler for the "Navigation Map" button.
1485:
1486: =head1 navmap object: Encapsulating the compiled nav map
1487:
1488: navmap is an object that encapsulates a compiled course map and provides a reasonable interface to it.
1489:
1490: Most notably it provides a way to navigate the map sensibly and a flexible iterator that makes it easy to write various renderers based on nav maps.
1491:
1492: You must obtain resource objects through the navmap object.
1493:
1494: =head2 Methods
1495:
1496: =over 4
1497:
1.70 bowersj2 1498: =item * B<new>(navHashFile, parmHashFile, genCourseAndUserOptions, genMailDiscussStatus): Binds a new navmap object to the compiled nav map hash and parm hash given as filenames. genCourseAndUserOptions is a flag saying whether the course options and user options hash should be generated. This is for when you are using the parameters of the resources that require them; see documentation in resource object documentation. genMailDiscussStatus causes the nav map to retreive information about the email and discussion status of resources. Returns the navmap object if this is successful, or B<undef> if not. You must check for undef; errors will occur when you try to use the other methods otherwise.
1.51 bowersj2 1499:
1500: =item * B<getIterator>(first, finish, filter, condition): See iterator documentation below.
1501:
1502: =cut
1503:
1504: use strict;
1505: use GDBM_File;
1506:
1507: sub new {
1508: # magic invocation to create a class instance
1509: my $proto = shift;
1510: my $class = ref($proto) || $proto;
1511: my $self = {};
1512:
1513: $self->{NAV_HASH_FILE} = shift;
1514: $self->{PARM_HASH_FILE} = shift;
1515: $self->{GENERATE_COURSE_USER_OPT} = shift;
1.55 bowersj2 1516: $self->{GENERATE_EMAIL_DISCUSS_STATUS} = shift;
1.51 bowersj2 1517:
1518: # Resource cache stores navmapresource's as we reference them. We generate
1519: # them on-demand so we don't pay for creating resources unless we use them.
1520: $self->{RESOURCE_CACHE} = {};
1521:
1522: # Network failure flag, if we accessed the course or user opt and
1523: # failed
1524: $self->{NETWORK_FAILURE} = 0;
1525:
1526: # tie the nav hash
1527: my %navmaphash;
1528: if (!(tie(%navmaphash, 'GDBM_File', $self->{NAV_HASH_FILE},
1529: &GDBM_READER(), 0640))) {
1530: return undef;
1531: }
1532: $self->{NAV_HASH} = \%navmaphash;
1533:
1534: my %parmhash;
1535: if (!(tie(%parmhash, 'GDBM_File', $self->{PARM_HASH_FILE},
1536: &GDBM_READER(), 0640)))
1537: {
1.66 bowersj2 1538: untie $self->{PARM_HASH};
1.51 bowersj2 1539: return undef;
1540: }
1541: $self->{PARM_HASH} = \%parmhash;
1542: $self->{HASH_TIED} = 1;
1543:
1544: # If the course opt hash and the user opt hash should be generated,
1545: # generate them
1546: if ($self->{GENERATE_COURSE_USER_OPT}) {
1547: my $uname=$ENV{'user.name'};
1548: my $udom=$ENV{'user.domain'};
1549: my $uhome=$ENV{'user.home'};
1550: my $cid=$ENV{'request.course.id'};
1551: my $chome=$ENV{'course.'.$cid.'.home'};
1552: my ($cdom,$cnum)=split(/\_/,$cid);
1553:
1554: my $userprefix=$uname.'_'.$udom.'_';
1555:
1556: my %courserdatas; my %useropt; my %courseopt;
1557: unless ($uhome eq 'no_host') {
1558: # ------------------------------------------------- Get coursedata (if present)
1559: unless ((time-$courserdatas{$cid.'.last_cache'})<240) {
1560: my $reply=&Apache::lonnet::reply('dump:'.$cdom.':'.$cnum.
1561: ':resourcedata',$chome);
1562: if ($reply!~/^error\:/) {
1563: $courserdatas{$cid}=$reply;
1564: $courserdatas{$cid.'.last_cache'}=time;
1565: }
1566: # check to see if network failed
1567: elsif ( $reply=~/no.such.host/i || $reply=~/con.*lost/i )
1568: {
1569: $self->{NETWORK_FAILURE} = 1;
1570: }
1571: }
1572: foreach (split(/\&/,$courserdatas{$cid})) {
1573: my ($name,$value)=split(/\=/,$_);
1574: $courseopt{$userprefix.&Apache::lonnet::unescape($name)}=
1575: &Apache::lonnet::unescape($value);
1576: }
1577: # --------------------------------------------------- Get userdata (if present)
1578: unless ((time-$userrdatas{$uname.'___'.$udom.'.last_cache'})<240) {
1579: my $reply=&Apache::lonnet::reply('dump:'.$udom.':'.$uname.':resourcedata',$uhome);
1580: if ($reply!~/^error\:/) {
1581: $userrdatas{$uname.'___'.$udom}=$reply;
1582: $userrdatas{$uname.'___'.$udom.'.last_cache'}=time;
1583: }
1584: # check to see if network failed
1585: elsif ( $reply=~/no.such.host/i || $reply=~/con.*lost/i )
1586: {
1587: $self->{NETWORK_FAILURE} = 1;
1588: }
1589: }
1590: foreach (split(/\&/,$userrdatas{$uname.'___'.$udom})) {
1591: my ($name,$value)=split(/\=/,$_);
1592: $useropt{$userprefix.&Apache::lonnet::unescape($name)}=
1593: &Apache::lonnet::unescape($value);
1594: }
1.55 bowersj2 1595: $self->{COURSE_OPT} = \%courseopt;
1596: $self->{USER_OPT} = \%useropt;
1.51 bowersj2 1597: }
1598: }
1599:
1.55 bowersj2 1600: if ($self->{GENERATE_EMAIL_DISCUSS_STATUS}) {
1601: my $cid=$ENV{'request.course.id'};
1602: my ($cdom,$cnum)=split(/\_/,$cid);
1603:
1604: my %emailstatus = &Apache::lonnet::dump('email_status');
1.56 bowersj2 1605: my $logoutTime = $emailstatus{'logout'};
1606: my $courseLeaveTime = $emailstatus{'logout_'.$ENV{'request.course.id'}};
1.55 bowersj2 1607: $self->{LAST_CHECK} = ($courseLeaveTime > $logoutTime ?
1608: $courseLeaveTime : $logoutTime);
1.56 bowersj2 1609: my %discussiontime = &Apache::lonnet::dump('discussiontimes',
1.55 bowersj2 1610: $cdom, $cnum);
1611: my %feedback=();
1612: my %error=();
1613: my $keys = &Apache::lonnet::reply('keys:'.
1614: $ENV{'user.domain'}.':'.
1615: $ENV{'user.name'}.':nohist_email',
1616: $ENV{'user.home'});
1617:
1618: foreach my $msgid (split(/\&/, $keys)) {
1619: $msgid=&Apache::lonnet::unescape($msgid);
1620: my $plain=&Apache::lonnet::unescape(&Apache::lonnet::unescape($msgid));
1621: if ($plain=~/(Error|Feedback) \[([^\]]+)\]/) {
1622: my ($what,$url)=($1,$2);
1623: my %status=
1624: &Apache::lonnet::get('email_status',[$msgid]);
1625: if ($status{$msgid}=~/^error\:/) {
1626: $status{$msgid}='';
1627: }
1628:
1629: if (($status{$msgid} eq 'new') ||
1630: (!$status{$msgid})) {
1631: if ($what eq 'Error') {
1632: $error{$url}.=','.$msgid;
1633: } else {
1634: $feedback{$url}.=','.$msgid;
1635: }
1636: }
1637: }
1638: }
1639:
1640: $self->{FEEDBACK} = \%feedback;
1641: $self->{ERROR_MSG} = \%error; # what is this? JB
1642: $self->{DISCUSSION_TIME} = \%discussiontime;
1643: $self->{EMAIL_STATUS} = \%emailstatus;
1644:
1645: }
1646:
1.51 bowersj2 1647: bless($self);
1.55 bowersj2 1648:
1649: return $self;
1650: }
1.51 bowersj2 1651:
1.55 bowersj2 1652: # Checks to see if coursemap is defined, matching test in old lonnavmaps
1653: sub courseMapDefined {
1654: my $self = shift;
1655: my $uri = &Apache::lonnet::clutter($ENV{'request.course.uri'});
1656:
1.56 bowersj2 1657: my $firstres = $self->{NAV_HASH}->{"map_start_$uri"};
1658: my $lastres = $self->{NAV_HASH}->{"map_finish_$uri"};
1.55 bowersj2 1659: return $firstres && $lastres;
1.51 bowersj2 1660: }
1661:
1662: sub getIterator {
1663: my $self = shift;
1664: my $iterator = Apache::lonnavmaps::iterator->new($self, shift, shift,
1.63 bowersj2 1665: shift, undef, shift);
1.51 bowersj2 1666: return $iterator;
1667: }
1668:
1669: # unties the hash when done
1670: sub untieHashes {
1671: my $self = shift;
1.60 bowersj2 1672: untie %{$self->{NAV_HASH}} if ($self->{HASH_TIED});
1673: untie %{$self->{PARM_HASH}} if ($self->{HASH_TIED});
1.51 bowersj2 1674: $self->{HASH_TIED} = 0;
1675: }
1676:
1677: # when the object is destroyed, be sure to untie all the hashes we tied.
1678: sub DESTROY {
1679: my $self = shift;
1680: $self->untieHashes();
1681: }
1682:
1.59 bowersj2 1683: # Private function: Does the given resource (as a symb string) have
1684: # current discussion? Returns 0 if chat/mail data not extracted.
1685: sub hasDiscussion {
1686: my $self = shift;
1687: my $symb = shift;
1688: if (!defined($self->{DISCUSSION_TIME})) { return 0; }
1689:
1690: return $self->{DISCUSSION_TIME}->{$symb} >
1.66 bowersj2 1691: $self->{LAST_CHECK};
1.59 bowersj2 1692: }
1693:
1694: # Private function: Does the given resource (as a symb string) have
1695: # current feedback? Returns the string in the feedback hash, which
1696: # will be false if it does not exist.
1697: sub getFeedback {
1698: my $self = shift;
1699: my $symb = shift;
1700:
1701: if (!defined($self->{FEEDBACK})) { return ""; }
1702:
1703: return $self->{FEEDBACK}->{$symb};
1704: }
1705:
1.51 bowersj2 1706: =pod
1707:
1708: =item * B<getById>(id): Based on the ID of the resource (1.1, 3.2, etc.), get a resource object for that resource. This method, or other methods that use it (as in the resource object) is the only proper way to obtain a resource object.
1709:
1710: =cut
1711:
1712: # The strategy here is to cache the resource objects, and only construct them
1713: # as we use them. The real point is to prevent reading any more from the tied
1714: # hash then we have to, which should hopefully alleviate speed problems.
1715: # Caching is just an incidental detail I throw in because it makes sense.
1716:
1717: sub getById {
1718: my $self = shift;
1719: my $id = shift;
1720:
1721: if (defined ($self->{RESOURCE_CACHE}->{$id}))
1722: {
1723: return $self->{RESOURCE_CACHE}->{$id};
1724: }
1725:
1726: # resource handles inserting itself into cache.
1727: return Apache::lonnavmaps::resource->new($self, $id);
1728: }
1729:
1730: =pod
1731:
1732: =item * B<firstResource>(): Returns a resource object reference corresponding to the first resource in the navmap.
1733:
1734: =cut
1735:
1736: sub firstResource {
1737: my $self = shift;
1738: my $firstResource = $self->{NAV_HASH}->{'map_start_' .
1739: &Apache::lonnet::clutter($ENV{'request.course.uri'})};
1740: return $self->getById($firstResource);
1741: }
1742:
1743: =pod
1744:
1745: =item * B<finishResource>(): Returns a resource object reference corresponding to the last resource in the navmap.
1746:
1747: =cut
1748:
1749: sub finishResource {
1750: my $self = shift;
1751: my $firstResource = $self->{NAV_HASH}->{'map_finish_' .
1752: &Apache::lonnet::clutter($ENV{'request.course.uri'})};
1753: return $self->getById($firstResource);
1754: }
1755:
1756: # -------------------------------------------- Figure out a cascading parameter
1757: #
1758: # For this function to work
1759: #
1760: # * parmhash needs to be tied
1761: # * courseopt and useropt need to be initialized for this user and course
1762: #
1763:
1764: sub parmval {
1765: my $self = shift;
1766: my ($what,$symb)=@_;
1767: my $cid=$ENV{'request.course.id'};
1768: my $csec=$ENV{'request.course.sec'};
1769: my $uname=$ENV{'user.name'};
1770: my $udom=$ENV{'user.domain'};
1771:
1772: unless ($symb) { return ''; }
1773: my $result='';
1774:
1775: my ($mapname,$id,$fn)=split(/\_\_\_/,$symb);
1776:
1777: # ----------------------------------------------------- Cascading lookup scheme
1778: my $rwhat=$what;
1779: $what=~s/^parameter\_//;
1780: $what=~s/\_/\./;
1781:
1782: my $symbparm=$symb.'.'.$what;
1783: my $mapparm=$mapname.'___(all).'.$what;
1784: my $usercourseprefix=$uname.'_'.$udom.'_'.$cid;
1785:
1786: my $seclevel= $usercourseprefix.'.['.$csec.'].'.$what;
1787: my $seclevelr=$usercourseprefix.'.['.$csec.'].'.$symbparm;
1788: my $seclevelm=$usercourseprefix.'.['.$csec.'].'.$mapparm;
1789:
1790: my $courselevel= $usercourseprefix.'.'.$what;
1791: my $courselevelr=$usercourseprefix.'.'.$symbparm;
1792: my $courselevelm=$usercourseprefix.'.'.$mapparm;
1793:
1794: my $useropt = $self->{USER_OPT};
1795: my $courseopt = $self->{COURSE_OPT};
1796: my $parmhash = $self->{PARM_HASH};
1797:
1798: # ---------------------------------------------------------- first, check user
1799: if ($uname and defined($useropt)) {
1.57 albertel 1800: if (defined($$useropt{$courselevelr})) { return $$useropt{$courselevelr}; }
1801: if (defined($$useropt{$courselevelm})) { return $$useropt{$courselevelm}; }
1802: if (defined($$useropt{$courselevel})) { return $$useropt{$courselevel}; }
1.51 bowersj2 1803: }
1804:
1805: # ------------------------------------------------------- second, check course
1806: if ($csec and defined($courseopt)) {
1.57 albertel 1807: if (defined($$courseopt{$seclevelr})) { return $$courseopt{$seclevelr}; }
1808: if (defined($$courseopt{$seclevelm})) { return $$courseopt{$seclevelm}; }
1809: if (defined($$courseopt{$seclevel})) { return $$courseopt{$seclevel}; }
1.51 bowersj2 1810: }
1811:
1812: if (defined($courseopt)) {
1.57 albertel 1813: if (defined($$courseopt{$courselevelr})) { return $$courseopt{$courselevelr}; }
1814: if (defined($$courseopt{$courselevelm})) { return $$courseopt{$courselevelm}; }
1815: if (defined($$courseopt{$courselevel})) { return $$courseopt{$courselevel}; }
1.51 bowersj2 1816: }
1817:
1818: # ----------------------------------------------------- third, check map parms
1819:
1820: my $thisparm=$$parmhash{$symbparm};
1.57 albertel 1821: if (defined($thisparm)) { return $thisparm; }
1.51 bowersj2 1822:
1823: # ----------------------------------------------------- fourth , check default
1824:
1825: my $default=&Apache::lonnet::metadata($fn,$rwhat.'.default');
1.57 albertel 1826: if (defined($default)) { return $default}
1.51 bowersj2 1827:
1828: # --------------------------------------------------- fifth , cascade up parts
1829:
1830: my ($space,@qualifier)=split(/\./,$rwhat);
1831: my $qualifier=join('.',@qualifier);
1832: unless ($space eq '0') {
1833: my ($part,$id)=split(/\_/,$space);
1834: if ($id) {
1835: my $partgeneral=$self->parmval($part.".$qualifier",$symb);
1.57 albertel 1836: if (defined($partgeneral)) { return $partgeneral; }
1.51 bowersj2 1837: } else {
1838: my $resourcegeneral=$self->parmval("0.$qualifier",$symb);
1.57 albertel 1839: if (defined($resourcegeneral)) { return $resourcegeneral; }
1.51 bowersj2 1840: }
1841: }
1842: return '';
1843: }
1844:
1845:
1846: 1;
1847:
1848: package Apache::lonnavmaps::iterator;
1849:
1850: # This package must precede "navmap" because "navmap" uses it. In
1851: # order to keep the documentation order straight, the iterator is documented
1852: # after the navmap object.
1853:
1854: =pod
1855:
1856: =back
1857:
1858: =head1 navmap Iterator
1859:
1860: An I<iterator> encapsulates the logic required to traverse a data structure. navmap uses an iterator to traverse the course map according to the criteria you wish to use.
1861:
1862: To obtain an iterator, call the B<getIterator>() function of a B<navmap> object. (Do not instantiate Apache::lonnavmaps::iterator directly.) This will return a reference to the iterator:
1863:
1864: C<my $resourceIterator = $navmap-E<gt>getIterator();>
1865:
1866: To get the next thing from the iterator, call B<next>:
1867:
1868: C<my $nextThing = $resourceIterator-E<gt>next()>
1869:
1870: getIterator behaves as follows:
1871:
1872: =over 4
1873:
1.70 bowersj2 1874: =item B<getIterator>(firstResource, finishResource, filterHash, condition): All parameters are optional. firstResource is a resource reference corresponding to where the iterator should start. It defaults to navmap->firstResource() for the corresponding nav map. finishResource corresponds to where you want the iterator to end, defaulting to navmap->finishResource(). filterHash is a hash used as a set containing strings representing the resource IDs, defaulting to empty. Condition is a 1 or 0 that sets what to do with the filter hash: If a 0, then only resource that exist IN the filterHash will be recursed on. If it is a 1, only resources NOT in the filterHash will be recursed on. Defaults to 0, which is to say, do not recurse unless explicitly asked to.
1.51 bowersj2 1875:
1.70 bowersj2 1876: Thus, by default, all resources will be shown. Change the condition to a 1 without changing the hash, and only the top level of the map will be shown. Changing the condition to 1 and including some values in the hash will allow you to selectively examine parts of the navmap, while leaving it on 0 and adding things to the hash will allow you to selectively ignore parts of the nav map. See the handler code for examples: By default, the condition is 0 and all folders are closed unless explicitly opened. Clicking "Show All Resources" will use a condition of 1 and an empty filterHash, resulting in all resources being shown.
1.51 bowersj2 1877:
1878: The iterator will return either a reference to a resource object, or a token representing something in the map, such as the beginning of a new branch. The possible tokens are:
1879:
1880: =over 4
1881:
1.70 bowersj2 1882: =item * BEGIN_MAP: A new map is being recursed into. This is returned I<after> the map resource itself is returned.
1883:
1884: =item * END_MAP: The map is now done.
1885:
1886: =item * BEGIN_BRANCH: A branch is now starting. The next resource returned will be the first in that branch.
1887:
1888: =item * END_BRANCH: The branch is now done.
1.51 bowersj2 1889:
1890: =back
1891:
1.70 bowersj2 1892: The tokens are retreivable via methods on the iterator object, i.e., $iterator->END_MAP.
1893:
1894: =back
1.51 bowersj2 1895:
1896: =cut
1897:
1898: # Here are the tokens for the iterator:
1899:
1900: sub BEGIN_MAP { return 1; } # begining of a new map
1901: sub END_MAP { return 2; } # end of the map
1902: sub BEGIN_BRANCH { return 3; } # beginning of a branch
1903: sub END_BRANCH { return 4; } # end of a branch
1904:
1905: # Params: nav map, start resource, end resource, filter, condition,
1906: # already seen hash ref
1907:
1908: sub new {
1909: # magic invocation to create a class instance
1910: my $proto = shift;
1911: my $class = ref($proto) || $proto;
1912: my $self = {};
1913:
1914: $self->{NAV_MAP} = shift;
1915: return undef unless ($self->{NAV_MAP});
1916:
1917: # Handle the parameters
1918: $self->{FIRST_RESOURCE} = shift || $self->{NAV_MAP}->firstResource();
1919: $self->{FINISH_RESOURCE} = shift || $self->{NAV_MAP}->finishResource();
1920:
1921: # If the given resources are just the ID of the resource, get the
1922: # objects
1923: if (!ref($self->{FIRST_RESOURCE})) { $self->{FIRST_RESOURCE} =
1924: $self->{NAV_MAP}->getById($self->{FIRST_RESOURCE}); }
1925: if (!ref($self->{FINISH_RESOURCE})) { $self->{FINISH_RESOURCE} =
1926: $self->{NAV_MAP}->getById($self->{FINISH_RESOURCE}); }
1927:
1928: $self->{FILTER} = shift;
1929:
1930: # A hash, used as a set, of resource already seen
1931: $self->{ALREADY_SEEN} = shift;
1932: if (!defined($self->{ALREADY_SEEN})) { $self->{ALREADY_SEEN} = {} };
1.63 bowersj2 1933: $self->{CONDITION} = shift;
1.51 bowersj2 1934:
1935: # Flag: Have we started yet? If not, the first action is to return BEGIN_MAP.
1936: $self->{STARTED} = 0;
1937:
1938: # Should we continue calling the recursive iterator, if any?
1939: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
1940: # The recursive iterator, if any
1941: $self->{RECURSIVE_ITERATOR} = undef;
1942: # Are we recursing on a map, or a branch?
1943: $self->{RECURSIVE_MAP} = 1; # we'll manually unset this when recursing on branches
1944: # And the count of how deep it is, so that this iterator can keep track of
1945: # when to pick back up again.
1946: $self->{RECURSIVE_DEPTH} = 0;
1947:
1948: # For keeping track of our branches, we maintain our own stack
1949: $self->{BRANCH_STACK} = [];
1950: # If the size shrinks, we exhausted a branch
1951: $self->{BRANCH_STACK_SIZE} = 0;
1952: $self->{BRANCH_DEPTH} = 0;
1953:
1954: # For returning two things in a forced sequence
1955: $self->{FORCE_NEXT} = undef;
1956:
1957: # Start with the first resource
1958: push @{$self->{BRANCH_STACK}}, $self->{FIRST_RESOURCE};
1959: $self->{BRANCH_STACK_SIZE} = 1;
1960:
1961: bless($self);
1962: return $self;
1963: }
1964:
1965: # Note... this function is *touchy*. I strongly recommend tracing
1966: # through it with the debugger a few times on a non-trivial map before
1967: # modifying it. Order is *everything*.
1968: sub next {
1969: my $self = shift;
1970:
1971: # Iterator logic goes here
1972:
1973: # Are we using a recursive iterator? If so, pull from that and
1974: # watch the depth; we want to resume our level at the correct time.
1975: if ($self->{RECURSIVE_ITERATOR_FLAG})
1976: {
1977: # grab the next from the recursive iterator
1978: my $next = $self->{RECURSIVE_ITERATOR}->next();
1979:
1980: # is it a begin or end map? Update depth if so
1981: if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
1982: if ($next == END_MAP() ) { $self->{RECURSIVE_DEPTH}--; }
1983:
1984: # Are we back at depth 0? If so, stop recursing.
1985: if ($self->{RECURSIVE_DEPTH} == 0) {
1986: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
1987: }
1988:
1989: return $next;
1990: }
1991:
1.68 bowersj2 1992: # Is this return value pre-determined?
1993: if (defined($self->{FORCE_NEXT})) {
1994: my $tmp = $self->{FORCE_NEXT};
1995: $self->{FORCE_NEXT} = undef;
1996: return $tmp;
1997: }
1998:
1.51 bowersj2 1999: # Is there a current resource to grab? If not, then return
2000: # END_BRANCH and END_MAP in succession.
2001: if (scalar(@{$self->{BRANCH_STACK}}) == 0) {
2002: if ($self->{BRANCH_DEPTH} > 0) {
2003: $self->{FORCE_NEXT} = $self->END_MAP();
1.52 bowersj2 2004: $self->{BRANCH_DEPTH}--;
1.51 bowersj2 2005: return $self->END_BRANCH();
2006: } else {
2007: return $self->END_MAP();
2008: }
2009: }
2010:
2011: # Have we not yet begun? If not, return BEGIN_MAP and
2012: # remember that we've started.
2013: if ( !$self->{STARTED} ) {
2014: $self->{STARTED} = 1;
2015: return $self->BEGIN_MAP;
2016: }
2017:
2018: # Did the branch stack shrink since last run? If so,
2019: # we exhausted a branch last time, therefore, we're about
2020: # to start a new one. (We know because we already checked to see
2021: # if the stack was empty.)
2022: if ( scalar (@{$self->{BRANCH_STACK}}) < $self->{BRANCH_STACK_SIZE}) {
1.52 bowersj2 2023: $self->{BRANCH_STACK_SIZE} = scalar(@{$self->{BRANCH_STACK}});
2024: $self->{BRANCH_DEPTH}++;
2025: return $self->BEGIN_BRANCH();
1.51 bowersj2 2026: }
2027:
1.52 bowersj2 2028: # Remember the size for comparision next time.
2029: $self->{BRANCH_STACK_SIZE} = scalar(@{$self->{BRANCH_STACK}});
2030:
2031: # If the next resource we mean to return is going to need
2032: # a lower branch level, terminate branches until we get
2033: # there.
2034:
1.51 bowersj2 2035: # Get the next resource in the branch
2036: $self->{HERE} = pop @{$self->{BRANCH_STACK}};
1.52 bowersj2 2037:
2038: # Are we at the right depth? If not, close a branch and return
2039: # the current resource onto the branch stack
2040: if (defined($self->{HERE}->{DATA}->{ITERATOR_DEPTH})
2041: && $self->{HERE}->{DATA}->{ITERATOR_DEPTH} <
2042: $self->{BRANCH_DEPTH} ) {
2043: $self->{BRANCH_DEPTH}--;
2044: # return it so we can pick it up eventually
2045: push @{$self->{BRANCH_STACK}}, $self->{HERE};
2046: return $self->END_BRANCH();
2047: }
2048:
1.51 bowersj2 2049: # We always return it after this point and never before
2050: # (proof: look at just the return statements), so we
2051: # remember that we've seen this.
2052: $self->{ALREADY_SEEN}->{$self->{HERE}->{ID}} = 1;
2053:
2054: # Get the next possible resources
2055: my $nextUnfiltered = $self->{HERE}->getNext();
2056: my $next = [];
2057:
2058: # filter the next possibilities to remove things we've
1.52 bowersj2 2059: # already seen. Also, remember what branch depth they should
2060: # be displayed at, since there's no other reliable way to tell.
1.51 bowersj2 2061: foreach (@$nextUnfiltered) {
1.52 bowersj2 2062: if (!defined($self->{ALREADY_SEEN}->{$_->{ID}})) {
2063: push @$next, $_;
2064: $_->{DATA}->{ITERATOR_DEPTH} =
2065: $self->{BRANCH_DEPTH} + 1;
2066: }
1.51 bowersj2 2067: }
2068:
2069: # Handle branch cases:
2070: # Nothing is available next: BRANCH_END
2071: # 1 thing next: standard non-branch
2072: # 2+ things next: have some branches
2073: my $nextCount = scalar(@$next);
2074: if ($nextCount == 0) {
1.52 bowersj2 2075: # Return this and on the next run, close the branch up if we're
2076: # in a branch
2077: if ($self->{BRANCH_DEPTH} > 0 ) {
2078: $self->{FORCE_NEXT} = $self->END_BRANCH();
2079: $self->{BRANCH_DEPTH}--;
2080: }
1.51 bowersj2 2081: }
2082:
2083: while (@$next) {
2084: # copy the next possibilities over to the branch stack
2085: # in the right order
1.52 bowersj2 2086: push @{$self->{BRANCH_STACK}}, shift @$next;
1.51 bowersj2 2087: }
2088:
2089: if ($nextCount >= 2) {
1.52 bowersj2 2090: $self->{FORCE_NEXT} = $self->BEGIN_BRANCH();
2091: $self->{BRANCH_DEPTH}++;
1.51 bowersj2 2092: return $self->{HERE};
2093: }
2094:
2095: # If this is a map and we want to recurse down it... (not filtered out)
1.70 bowersj2 2096: if ($self->{HERE}->is_map() &&
1.63 bowersj2 2097: (defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {
1.51 bowersj2 2098: $self->{RECURSIVE_ITERATOR_FLAG} = 1;
2099: my $firstResource = $self->{HERE}->map_start();
2100: my $finishResource = $self->{HERE}->map_finish();
2101:
2102: $self->{RECURSIVE_ITERATOR} =
2103: Apache::lonnavmaps::iterator->new ($self->{NAV_MAP}, $firstResource,
1.63 bowersj2 2104: $finishResource, $self->{FILTER}, $self->{ALREADY_SEEN},
1.66 bowersj2 2105: $self->{CONDITION});
1.51 bowersj2 2106: }
2107:
2108: return $self->{HERE};
2109: }
2110:
2111: =pod
2112:
2113: The other method available on the iterator is B<getStack>, which returns an array populated with the current 'stack' of maps, as references to the resource objects. Example: This is useful when making the navigation map, as we need to check whether we are under a page map to see if we need to link directly to the resource, or to the page. The first elements in the array will correspond to the top of the stack (most inclusive map).
2114:
2115: =cut
2116:
2117: sub getStack {
2118: my $self=shift;
2119:
2120: my @stack;
2121:
2122: $self->populateStack(\@stack);
2123:
2124: return \@stack;
2125: }
2126:
2127: # Private method: Calls the iterators recursively to populate the stack.
2128: sub populateStack {
2129: my $self=shift;
2130: my $stack = shift;
2131:
2132: push @$stack, $self->{HERE};
2133:
2134: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
2135: $self->{RECURSIVE_ITERATOR}->populateStack($stack);
2136: }
2137: }
2138:
1.1 www 2139: 1;
1.2 www 2140:
1.51 bowersj2 2141: package Apache::lonnavmaps::resource;
2142:
2143: use Apache::lonnet;
2144:
2145: =pod
2146:
2147: =head1 Object: resource
2148:
2149: A resource object encapsulates a resource in a resource map, allowing easy manipulation of the resource, querying the properties of the resource (including user properties), and represents a reference that can be used as the canonical representation of the resource by lonnavmap clients like renderers.
2150:
2151: A resource only makes sense in the context of a navmap, as some of the data is stored in the navmap object.
2152:
2153: You will probably never need to instantiate this object directly. Use Apache::lonnavmap::navmap, and use the "start" method to obtain the starting resource.
2154:
2155: =head2 Public Members
2156:
2157: resource objects have a hash called DATA ($resourceRef->{DATA}) that you can store whatever you want in. This allows you to easily do two-pass algorithms without worrying about managing your own resource->data hash.
2158:
2159: =head2 Methods
2160:
2161: =over 4
2162:
1.70 bowersj2 2163: =item * B<new>($navmapRef, $idString): The first arg is a reference to the parent navmap object. The second is the idString of the resource itself. Very rarely, if ever, called directly. Use the nav map->getByID() method.
2164:
2165: =back
1.51 bowersj2 2166:
2167: =cut
2168:
2169: sub new {
2170: # magic invocation to create a class instance
2171: my $proto = shift;
2172: my $class = ref($proto) || $proto;
2173: my $self = {};
2174:
2175: $self->{NAV_MAP} = shift;
2176: $self->{ID} = shift;
2177:
2178: # Store this new resource in the parent nav map's cache.
2179: $self->{NAV_MAP}->{RESOURCE_CACHE}->{$self->{ID}} = $self;
1.66 bowersj2 2180: $self->{RESOURCE_ERROR} = 0;
1.51 bowersj2 2181:
2182: # A hash that can be used by two-pass algorithms to store data
2183: # about this resource in. Not used by the resource object
2184: # directly.
2185: $self->{DATA} = {};
2186:
2187: bless($self);
2188:
2189: return $self;
2190: }
2191:
1.70 bowersj2 2192: # private function: simplify the NAV_HASH lookups we keep doing
2193: # pass the name, and to automatically append my ID, pass a true val on the
2194: # second param
2195: sub navHash {
2196: my $self = shift;
2197: my $param = shift;
2198: my $id = shift;
2199: return $self->{NAV_MAP}->{NAV_HASH}->{$param . ($id?$self->{ID}:"")};
2200: }
2201:
1.51 bowersj2 2202: =pod
2203:
1.70 bowersj2 2204: B<Metadata Retreival>
2205:
2206: These are methods that help you retrieve metadata about the resource:
2207:
2208: =over 4
2209:
2210: =item * B<ext>: Returns true if the resource is external.
2211:
2212: =item * B<goesto>: Returns the "goesto" value from the compiled nav map. (It is likely you want to use B<getNext> instead.)
2213:
2214: =item * B<kind>: Returns the kind of the resource from the compiled nav map.
2215:
2216: =item * B<randomout>: Returns true if this resource was chosen to NOT be shown to the user by the random map selection feature.
1.51 bowersj2 2217:
1.70 bowersj2 2218: =item * B<randompick>: Returns true for a map if the randompick feature is being used on the map. (?)
2219:
2220: =item * B<src>: Returns the source for the resource.
2221:
2222: =item * B<symb>: Returns the symb for the resource.
2223:
2224: =item * B<title>: Returns the title of the resource.
2225:
2226: =item * B<to>: Returns the "to" value from the compiled nav map. (It is likely you want to use B<getNext> instead.)
1.51 bowersj2 2227:
2228: =item * B<type>: Returns the type of the resource, "start", "normal", or "finish".
2229:
2230: =back
2231:
2232: =cut
2233:
2234: # These info functions can be used directly, as they don't return
2235: # resource information.
1.70 bowersj2 2236: sub ext { my $self=shift; return $self->navHash("ext_", 1) eq 'true:'; }
1.51 bowersj2 2237: sub goesto { my $self=shift; return $self->navHash("goesto_", 1); }
2238: sub kind { my $self=shift; return $self->navHash("kind_", 1); }
1.68 bowersj2 2239: sub randomout { my $self=shift; return $self->navHash("randomout_", 1); }
2240: sub randompick {
2241: my $self = shift;
2242: return $self->{NAV_MAP}->{PARM_HASH}->{$self->symb .
2243: '.0.parameter_randompick'};
2244: }
1.51 bowersj2 2245: sub src {
2246: my $self=shift;
2247: return $self->navHash("src_", 1);
2248: }
2249: sub symb {
2250: my $self=shift;
2251: (my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
2252: my $symbSrc = &Apache::lonnet::declutter($self->src());
2253: return &Apache::lonnet::declutter(
2254: $self->navHash('map_id_'.$first))
2255: . '___' . $second . '___' . $symbSrc;
2256: }
1.70 bowersj2 2257: sub title { my $self=shift; return $self->navHash("title_", 1); }
2258: sub to { my $self=shift; return $self->navHash("to_", 1); }
2259: sub type { my $self=shift; return $self->navHash("type_", 1); }
2260:
2261: =pod
2262:
2263: B<Predicate Testing the Resource>
2264:
2265: These methods are shortcuts to deciding if a given resource has a given property.
2266:
2267: =over 4
2268:
2269: =item * B<is_map>: Returns true if the resource is a map type.
2270:
2271: =item * B<is_problem>: Returns true if the resource is a problem type, false otherwise. (Looks at the extension on the src field; might need more to work correctly.)
2272:
2273: =item * B<is_page>: Returns true if the resource is a page.
2274:
2275: =item * B<is_problem>: Returns true if the resource is a problem.
2276:
2277: =item * B<is_sequence>: Returns true if the resource sequence.
2278:
2279: =back
2280:
2281: =cut
2282:
2283:
2284: sub is_html {
1.51 bowersj2 2285: my $self=shift;
2286: my $src = $self->src();
1.70 bowersj2 2287: return ($src =~ /html$/);
1.51 bowersj2 2288: }
1.70 bowersj2 2289: sub is_map { my $self=shift; return defined($self->navHash("is_map_", 1)); }
2290: sub is_page {
1.51 bowersj2 2291: my $self=shift;
2292: my $src = $self->src();
1.70 bowersj2 2293: return ($src =~ /page$/);
1.51 bowersj2 2294: }
1.70 bowersj2 2295: sub is_problem {
1.51 bowersj2 2296: my $self=shift;
2297: my $src = $self->src();
1.70 bowersj2 2298: return ($src =~ /problem$/);
1.51 bowersj2 2299: }
1.70 bowersj2 2300: sub is_sequence {
1.51 bowersj2 2301: my $self=shift;
2302: my $src = $self->src();
1.70 bowersj2 2303: return ($src =~ /sequence$/);
1.51 bowersj2 2304: }
2305:
2306:
2307:
2308:
1.70 bowersj2 2309:
1.51 bowersj2 2310: # Move this into POD: In order to use these correctly, courseopt
2311: # and useropt need to be generated
2312: sub parmval {
2313: my $self = shift;
2314: my $what = shift;
2315: my $part = shift || "0";
2316: return $self->{NAV_MAP}->parmval($part.'.'.$what, $self->symb());
2317: }
2318:
1.70 bowersj2 2319: =pod
2320:
2321: B<Map Methods>
2322:
2323: These methods are useful for getting information about the map properties of the resource, if the resource is a map (B<is_map>).
2324:
2325: =over 4
2326:
2327: =item * B<map_finish>: Returns a reference to a resource object corresponding to the finish resource of the map.
2328:
2329: =item * B<map_pc>: Returns the pc value of the map, which is the first number that appears in the resource ID of the resources in the map, and is the number that appears around the middle of the symbs of the resources in that map.
2330:
2331: =item * B<map_start>: Returns a reference to a resource object corresponding to the start resource of the map.
2332:
2333: =item * B<map_type>: Returns a string with the type of the map in it.
2334:
2335: =back
1.51 bowersj2 2336:
1.70 bowersj2 2337: =cut
1.51 bowersj2 2338:
2339: sub map_finish {
2340: my $self = shift;
2341: my $src = $self->src();
2342: my $res = $self->navHash("map_finish_$src", 0);
2343: $res = $self->{NAV_MAP}->getById($res);
2344: return $res;
2345: }
1.70 bowersj2 2346: sub map_pc {
2347: my $self = shift;
2348: my $src = $self->src();
2349: return $self->navHash("map_pc_$src", 0);
2350: }
1.51 bowersj2 2351: sub map_start {
2352: my $self = shift;
2353: my $src = $self->src();
2354: my $res = $self->navHash("map_start_$src", 0);
2355: $res = $self->{NAV_MAP}->getById($res);
2356: return $res;
2357: }
2358: sub map_type {
2359: my $self = shift;
2360: my $pc = $self->map_pc();
2361: return $self->navHash("map_type_$pc", 0);
2362: }
2363:
2364:
2365:
2366: #####
2367: # Property queries
2368: #####
2369:
2370: # These functions will be responsible for returning the CORRECT
2371: # VALUE for the parameter, no matter what. So while they may look
2372: # like direct calls to parmval, they can be more then that.
2373: # So, for instance, the duedate function should use the "duedatetype"
2374: # information, rather then the resource object user.
2375:
2376: =pod
2377:
2378: =head2 Resource Parameters
2379:
1.70 bowersj2 2380: In order to use the resource parameters correctly, the nav map must have been instantiated with genCourseAndUserOptions set to true, so the courseopt and useropt is read correctly. Then, you can call these functions to get the relevant parameters for the resource. Each function defaults to part "0", but can be directed to another part by passing the part as the parameter.
1.51 bowersj2 2381:
2382: These methods are responsible for getting the parameter correct, not merely reflecting the contents of the GDBM hashes. As we move towards dates relative to other dates, these methods should be updated to reflect that. (Then, anybody using these methods won't have to update their code.)
2383:
2384: =over 4
2385:
2386: =item * B<acc>: Get the Client IP/Name Access Control information.
2387:
2388: =item * B<answerdate>: Get the answer-reveal date for the problem.
2389:
2390: =item * B<duedate>: Get the due date for the problem.
2391:
2392: =item * B<tries>: Get the number of tries the student has used on the problem.
2393:
2394: =item * B<maxtries>: Get the number of max tries allowed.
2395:
2396: =item * B<opendate>: Get the open date for the problem.
2397:
2398: =item * B<sig>: Get the significant figures setting.
2399:
2400: =item * B<tol>: Get the tolerance for the problem.
2401:
1.70 bowersj2 2402: =item * B<tries>: Get the number of tries the user has already used on the problem.
2403:
1.51 bowersj2 2404: =item * B<type>: Get the question type for the problem.
2405:
2406: =item * B<weight>: Get the weight for the problem.
2407:
2408: =back
2409:
2410: =cut
2411:
2412: sub acc {
2413: (my $self, my $part) = @_;
2414: return $self->parmval("acc", $part);
2415: }
2416: sub answerdate {
2417: (my $self, my $part) = @_;
2418: # Handle intervals
2419: if ($self->parmval("answerdate.type", $part) eq 'date_interval') {
2420: return $self->duedate($part) +
2421: $self->parmval("answerdate", $part);
2422: }
2423: return $self->parmval("answerdate", $part);
2424: }
2425: sub duedate {
2426: (my $self, my $part) = @_;
2427: return $self->parmval("duedate", $part);
2428: }
2429: sub maxtries {
2430: (my $self, my $part) = @_;
2431: return $self->parmval("maxtries", $part);
2432: }
2433: sub opendate {
2434: (my $self, my $part) = @_;
2435: if ($self->parmval("opendate.type", $part) eq 'date_interval') {
2436: return $self->duedate($part) -
2437: $self->parmval("opendate", $part);
2438: }
2439: return $self->parmval("opendate");
2440: }
2441: sub sig {
2442: (my $self, my $part) = @_;
2443: return $self->parmval("sig", $part);
2444: }
2445: sub tol {
2446: (my $self, my $part) = @_;
2447: return $self->parmval("tol", $part);
2448: }
2449: sub tries {
2450: my $self = shift;
2451: my $part = shift;
2452: $part = '0' if (!defined($part));
2453:
2454: # Make sure return hash is loaded, should error check
2455: $self->getReturnHash();
2456:
2457: my $tries = $self->{RETURN_HASH}->{'resource.'.$part.'.tries'};
2458: if (!defined($tries)) {return '0';}
2459: return $tries;
2460: }
1.70 bowersj2 2461: sub type {
2462: (my $self, my $part) = @_;
2463: return $self->parmval("type", $part);
2464: }
2465: sub weight {
2466: (my $self, my $part) = @_;
2467: return $self->parmval("weight", $part);
2468: }
1.51 bowersj2 2469:
2470: # Multiple things need this
2471: sub getReturnHash {
2472: my $self = shift;
2473:
2474: if (!defined($self->{RETURN_HASH})) {
2475: my %tmpHash = &Apache::lonnet::restore($self->symb());
2476: $self->{RETURN_HASH} = \%tmpHash;
2477: }
2478: }
2479:
2480: ######
2481: # Status queries
2482: ######
2483:
2484: # These methods query the status of problems.
2485:
2486: # If we need to count parts, this function determines the number of
2487: # parts from the metadata. When called, it returns a reference to a list
2488: # of strings corresponding to the parts. (Thus, using it in a scalar context
2489: # tells you how many parts you have in the problem:
2490: # $partcount = scalar($resource->countParts());
2491: # Don't use $self->{PARTS} directly because you don't know if it's been
2492: # computed yet.
2493:
2494: =pod
2495:
2496: =head2 Resource misc
2497:
2498: Misc. functions for the resource.
2499:
2500: =over 4
2501:
1.59 bowersj2 2502: =item * B<hasDiscussion>: Returns a false value if there has been discussion since the user last logged in, true if there has. Always returns false if the discussion data was not extracted when the nav map was constructed.
2503:
2504: =item * B<getFeedback>: Gets the feedback for the resource and returns the raw feedback string for the resource, or the null string if there is no feedback or the email data was not extracted when the nav map was constructed. Usually used like this:
2505:
2506: for (split(/\,/, $res->getFeedback())) {
2507: my $link = &Apache::lonnet::escape($_);
2508: ...
2509:
2510: and use the link as appropriate.
2511:
2512: =cut
2513:
2514: sub hasDiscussion {
2515: my $self = shift;
2516: return $self->{NAV_MAP}->hasDiscussion($self->symb());
2517: }
2518:
2519: sub getFeedback {
2520: my $self = shift;
2521: return $self->{NAV_MAP}->getFeedback($self->symb());
2522: }
2523:
2524: =pod
2525:
1.70 bowersj2 2526: =item * B<parts>(): Returns a list reference containing sorted strings corresponding to each part of the problem. To count the number of parts, use the list in a scalar context, and subtract one if greater then two. (One part problems have a part 0. Multi-parts have a part 0, plus a part for each part. Filtering part 0 if you want it is up to you.)
1.51 bowersj2 2527:
1.70 bowersj2 2528: =item * B<countParts>(): Returns the number of parts of the problem a student can answer. Thus, for single part problems, returns 1. For multipart, it returns the number of parts in the problem, not including psuedo-part 0. Thus, B<parts> may return an array with fewer parts in it then countParts might lead you to believe.
1.51 bowersj2 2529:
2530: =back
2531:
2532: =cut
2533:
2534: sub parts {
2535: my $self = shift;
2536:
1.67 bowersj2 2537: if ($self->ext) { return ['0']; }
2538:
1.51 bowersj2 2539: $self->extractParts();
2540: return $self->{PARTS};
2541: }
2542:
2543: sub countParts {
2544: my $self = shift;
2545:
2546: my $parts = $self->parts();
1.66 bowersj2 2547:
2548: if ($self->{RESOURCE_ERROR}) {
2549: return 0;
2550: }
2551:
2552: if (scalar(@{$parts}) < 2) { return 1;}
1.51 bowersj2 2553:
2554: return scalar(@{$parts}) - 1;
2555: }
2556:
2557: # Private function: Extracts the parts information and saves it
2558: sub extractParts {
2559: my $self = shift;
2560:
2561: return if ($self->{PARTS});
1.67 bowersj2 2562: return if ($self->ext);
1.51 bowersj2 2563:
2564: $self->{PARTS} = [];
2565:
2566: # Retrieve part count
1.66 bowersj2 2567: my $metadata = &Apache::lonnet::metadata($self->src(), 'allpossiblekeys');
2568: if (!$metadata) {
2569: $self->{RESOURCE_ERROR} = 1;
2570: $self->{PARTS} = [];
2571: return;
2572: }
2573:
2574: foreach (split(/\,/,$metadata)) {
1.51 bowersj2 2575: if ($_ =~ /^parameter\_(.*)\_opendate$/) {
2576: push @{$self->{PARTS}}, $1;
2577: }
2578: }
1.66 bowersj2 2579:
1.51 bowersj2 2580:
2581: # Is this possible to do in one line? - Jeremy
2582: my @sortedParts = sort @{$self->{PARTS}};
2583: $self->{PARTS} = \@sortedParts;
2584:
2585: return;
2586: }
2587:
2588: =pod
2589:
2590: =head2 Resource Status
2591:
2592: Problem resources have status information, reflecting their various dates and completion statuses. You can obtain this information and import symbolic constants to represent the status.
2593:
2594: There are two aspects to the status: the date-related information and the completion information.
2595:
2596: Idiomatic usage of these two methods would probably look something like
2597:
2598: foreach ($resource->parts()) {
2599: my $dateStatus = $resource->getDateStatus($_);
2600: my $completionStatus = $resource->getCompletionStatus($_);
2601:
1.70 bowersj2 2602: or
2603:
2604: my $status = $resource->status($_);
2605:
1.51 bowersj2 2606: ... use it here ...
2607: }
2608:
2609: =over 4
2610:
1.70 bowersj2 2611: =item * B<getDateStatus>($part): ($part defaults to 0). A convenience function that returns a symbolic constant telling you about the date status of the part. The possible return values are:
1.51 bowersj2 2612:
2613: =back
2614:
2615: B<Date Codes>
2616:
2617: =over 4
2618:
2619: =item * B<OPEN_LATER>: The problem will be opened later.
2620:
2621: =item * B<OPEN>: Open and not yet due.
2622:
1.59 bowersj2 2623:
1.54 bowersj2 2624: =item * B<PAST_DUE_ANSWER_LATER>: The due date has passed, but the answer date has not yet arrived.
2625:
2626: =item * B<PAST_DUE_NO_ANSWER>: The due date has passed and there is no answer opening date set.
1.51 bowersj2 2627:
2628: =item * B<ANSWER_OPEN>: The answer date is here.
2629:
2630: =item * B<NETWORK_FAILURE>: The information is unknown due to network failure.
2631:
2632: =back
2633:
2634: =cut
2635:
2636: # Apparently the compiler optimizes these into constants automatically
1.54 bowersj2 2637: sub OPEN_LATER { return 0; }
2638: sub OPEN { return 1; }
2639: sub PAST_DUE_NO_ANSWER { return 2; }
2640: sub PAST_DUE_ANSWER_LATER { return 3; }
2641: sub ANSWER_OPEN { return 4; }
2642: sub NOTHING_SET { return 5; }
2643: sub NETWORK_FAILURE { return 100; }
2644:
2645: # getDateStatus gets the date status for a given problem part.
2646: # Because answer date, due date, and open date are fully independent
2647: # (i.e., it is perfectly possible to *only* have an answer date),
2648: # we have to completely cover the 3x3 maxtrix of (answer, due, open) x
2649: # (past, future, none given). This function handles this with a decision
2650: # tree. Read the comments to follow the decision tree.
1.51 bowersj2 2651:
2652: sub getDateStatus {
2653: my $self = shift;
2654: my $part = shift;
2655: $part = "0" if (!defined($part));
1.54 bowersj2 2656:
2657: # Always return network failure if there was one.
1.51 bowersj2 2658: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
2659:
2660: my $now = time();
2661:
1.53 bowersj2 2662: my $open = $self->opendate($part);
2663: my $due = $self->duedate($part);
2664: my $answer = $self->answerdate($part);
2665:
2666: if (!$open && !$due && !$answer) {
2667: # no data on the problem at all
2668: # should this be the same as "open later"? think multipart.
2669: return $self->NOTHING_SET;
2670: }
1.59 bowersj2 2671: if (!$open || $now < $open) {return $self->OPEN_LATER}
2672: if (!$due || $now < $due) {return $self->OPEN}
2673: if ($answer && $now < $answer) {return $self->PAST_DUE_ANSWER_LATER}
2674: if ($answer) { return $self->ANSWER_OPEN; }
1.54 bowersj2 2675: return PAST_DUE_NO_ANSWER;
1.51 bowersj2 2676: }
2677:
2678: =pod
2679:
2680: B<>
2681:
2682: =over 4
2683:
2684: =item * B<getCompletionStatus>($part): ($part defaults to 0.) A convenience function that returns a symbolic constant telling you about the completion status of the part, with the following possible results:
2685:
2686: =back
2687:
2688: B<Completion Codes>
2689:
2690: =over 4
2691:
2692: =item * B<NOT_ATTEMPTED>: Has not been attempted at all.
2693:
2694: =item * B<INCORRECT>: Attempted, but wrong by student.
2695:
2696: =item * B<INCORRECT_BY_OVERRIDE>: Attempted, but wrong by instructor override.
2697:
2698: =item * B<CORRECT>: Correct or correct by instructor.
2699:
2700: =item * B<CORRECT_BY_OVERRIDE>: Correct by instructor override.
2701:
2702: =item * B<EXCUSED>: Excused. Not yet implemented.
2703:
2704: =item * B<NETWORK_FAILURE>: Information not available due to network failure.
2705:
1.69 bowersj2 2706: =item * B<ATTEMPTED>: Attempted, and not yet graded.
2707:
1.51 bowersj2 2708: =back
2709:
2710: =cut
2711:
1.53 bowersj2 2712: sub NOT_ATTEMPTED { return 10; }
2713: sub INCORRECT { return 11; }
2714: sub INCORRECT_BY_OVERRIDE { return 12; }
2715: sub CORRECT { return 13; }
2716: sub CORRECT_BY_OVERRIDE { return 14; }
2717: sub EXCUSED { return 15; }
1.69 bowersj2 2718: sub ATTEMPTED { return 16; }
1.51 bowersj2 2719:
2720: sub getCompletionStatus {
2721: my $self = shift;
2722: my $part = shift;
2723: $part = "0" if (!defined($part));
2724: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
2725:
2726: # Make sure return hash exists
2727: $self->getReturnHash();
2728:
2729: my $status = $self->{RETURN_HASH}->{'resource.'.$part.'.solved'};
2730:
2731: # Left as seperate if statements in case we ever do more with this
2732: if ($status eq 'correct_by_student') {return $self->CORRECT;}
2733: if ($status eq 'correct_by_override') {return $self->CORRECT_BY_OVERRIDE; }
2734: if ($status eq 'incorrect_attempted') {return $self->INCORRECT; }
2735: if ($status eq 'incorrect_by_override') {return $self->INCORRECT_BY_OVERRIDE; }
2736: if ($status eq 'excused') {return $self->EXCUSED; }
1.69 bowersj2 2737: if ($status eq 'ungraded_attempted') {return $self->ATTEMPTED; }
1.51 bowersj2 2738: return $self->NOT_ATTEMPTED;
2739: }
2740:
2741: =pod
2742:
2743: B<Composite Status>
2744:
2745: Along with directly returning the date or completion status, the resource object includes a convenience function B<status>() that will combine the two status tidbits into one composite status that can represent the status of the resource as a whole. The precise logic is documented in the comments of the status method. The following results may be returned, all available as methods on the resource object ($res->NETWORK_FAILURE()):
2746:
2747: =over 4
2748:
1.70 bowersj2 2749: =item * B<NETWORK_FAILURE>: The network has failed and the information is not available.
1.51 bowersj2 2750:
1.70 bowersj2 2751: =item * B<NOTHING_SET>: No dates have been set for this problem (part) at all. (Because only certain parts of a multi-part problem may be assigned, this can not be collapsed into "open later", as we don't know a given part will EVER be opened. For single part, this is the same as "OPEN_LATER".)
1.53 bowersj2 2752:
1.70 bowersj2 2753: =item * B<CORRECT>: For any reason at all, the part is considered correct.
1.51 bowersj2 2754:
1.70 bowersj2 2755: =item * B<EXCUSED>: For any reason at all, the problem is excused.
1.51 bowersj2 2756:
1.70 bowersj2 2757: =item * B<PAST_DUE_NO_ANSWER>: The problem is past due, not considered correct, and no answer date is set.
1.54 bowersj2 2758:
1.70 bowersj2 2759: =item * B<PAST_DUE_ANSWER_LATER>: The problem is past due, not considered correct, and an answer date in the future is set.
1.51 bowersj2 2760:
1.70 bowersj2 2761: =item * B<ANSWER_OPEN>: The problem is past due, not correct, and the answer is now available.
1.51 bowersj2 2762:
1.70 bowersj2 2763: =item * B<OPEN_LATER>: The problem is not yet open.
1.51 bowersj2 2764:
1.70 bowersj2 2765: =item * B<TRIES_LEFT>: The problem is open, has been tried, is not correct, but there are tries left.
1.51 bowersj2 2766:
1.70 bowersj2 2767: =item * B<INCORRECT>: The problem is open, and all tries have been used without getting the correct answer.
1.51 bowersj2 2768:
1.70 bowersj2 2769: =item * B<OPEN>: The item is open and not yet tried.
1.51 bowersj2 2770:
1.70 bowersj2 2771: =item * B<ATTEMPTED>: The problem has been attempted.
1.69 bowersj2 2772:
1.51 bowersj2 2773: =back
2774:
2775: =cut
2776:
2777: sub TRIES_LEFT { return 10; }
2778:
2779: sub status {
2780: my $self = shift;
2781: my $part = shift;
2782: if (!defined($part)) { $part = "0"; }
2783: my $completionStatus = $self->getCompletionStatus($part);
2784: my $dateStatus = $self->getDateStatus($part);
2785:
2786: # What we have is a two-dimensional matrix with 4 entries on one
2787: # dimension and 5 entries on the other, which we want to colorize,
1.54 bowersj2 2788: # plus network failure and "no date data at all".
1.51 bowersj2 2789:
1.53 bowersj2 2790: if ($completionStatus == NETWORK_FAILURE) { return NETWORK_FAILURE; }
1.51 bowersj2 2791:
2792: # There are a few whole rows we can dispose of:
1.53 bowersj2 2793: if ($completionStatus == CORRECT ||
2794: $completionStatus == CORRECT_BY_OVERRIDE ) {
1.69 bowersj2 2795: return CORRECT;
2796: }
2797:
2798: if ($completionStatus == ATTEMPTED) {
2799: return ATTEMPTED;
1.53 bowersj2 2800: }
2801:
2802: # If it's EXCUSED, then return that no matter what
2803: if ($completionStatus == EXCUSED) {
2804: return EXCUSED;
1.51 bowersj2 2805: }
2806:
1.53 bowersj2 2807: if ($dateStatus == NOTHING_SET) {
2808: return NOTHING_SET;
1.51 bowersj2 2809: }
2810:
1.69 bowersj2 2811: # Now we're down to a 4 (incorrect, incorrect_override, not_attempted)
2812: # by 4 matrix (date statuses).
1.51 bowersj2 2813:
1.54 bowersj2 2814: if ($dateStatus == PAST_DUE_ANSWER_LATER ||
1.59 bowersj2 2815: $dateStatus == PAST_DUE_NO_ANSWER ) {
1.54 bowersj2 2816: return $dateStatus;
1.51 bowersj2 2817: }
2818:
1.53 bowersj2 2819: if ($dateStatus == ANSWER_OPEN) {
2820: return ANSWER_OPEN;
1.51 bowersj2 2821: }
2822:
2823: # Now: (incorrect, incorrect_override, not_attempted) x
2824: # (open_later), (open)
2825:
1.53 bowersj2 2826: if ($dateStatus == OPEN_LATER) {
2827: return OPEN_LATER;
1.51 bowersj2 2828: }
2829:
2830: # If it's WRONG...
1.53 bowersj2 2831: if ($completionStatus == INCORRECT || $completionStatus == INCORRECT_BY_OVERRIDE) {
1.51 bowersj2 2832: # and there are TRIES LEFT:
2833: if ($self->tries() < $self->maxtries()) {
1.53 bowersj2 2834: return TRIES_LEFT;
1.51 bowersj2 2835: }
1.53 bowersj2 2836: return INCORRECT; # otherwise, return orange; student can't fix this
1.51 bowersj2 2837: }
2838:
2839: # Otherwise, it's untried and open
1.53 bowersj2 2840: return OPEN;
1.51 bowersj2 2841: }
2842:
2843: =pod
2844:
2845: =head2 Resource/Nav Map Navigation
2846:
2847: =over 4
2848:
2849: =item * B<getNext>(): Gets the next resource in the navmap after this one.
2850:
2851: =cut
2852:
2853: # For the simple single-link case, to get from a resource to the next
2854: # resource, you need to look up the "to_" link in the nav hash, then
2855: # follow that with the "goesto_" link.
2856:
2857: sub getNext {
2858: my $self = shift;
2859: my $alreadySeenHash = shift;
2860: my @branches;
2861: my $to = $self->to();
2862: foreach my $branch ( split(/\,/, $to) ) {
2863: my $choice = $self->{NAV_MAP}->getById($branch);
2864: my $next = $choice->goesto();
2865: $next = $self->{NAV_MAP}->getById($next);
2866:
1.61 bowersj2 2867: # Don't remember it if we've already seen it or if
1.66 bowersj2 2868: # the student doesn't have browse priviledges
2869: my $browsePriv = &Apache::lonnet::allowed('bre', $self->src);
1.51 bowersj2 2870: if (!defined($alreadySeenHash) ||
1.61 bowersj2 2871: !defined($alreadySeenHash->{$next->{ID}}) ||
1.66 bowersj2 2872: ($browsePriv ne '2' && $browsePriv ne 'F')) {
1.51 bowersj2 2873: push @branches, $next;
2874: }
2875: }
2876: return \@branches;
2877: }
2878:
2879: =pod
1.2 www 2880:
1.51 bowersj2 2881: =back
1.2 www 2882:
1.51 bowersj2 2883: =cut
1.2 www 2884:
1.51 bowersj2 2885: 1;
1.2 www 2886:
1.51 bowersj2 2887: __END__
1.2 www 2888:
2889:
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