Annotation of loncom/interface/lonnavmaps.pm, revision 1.83
1.72 bowersj2 1:
1.2 www 2: # The LearningOnline Network with CAPA
3: # Navigate Maps Handler
1.1 www 4: #
1.82 bowersj2 5: # $Id: lonnavmaps.pm,v 1.81 2002/10/14 18:48:13 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",
1.80 bowersj2 826: $ENV{"request.course.fn"}."_parms.db", 1, 1);
1.51 bowersj2 827:
1.55 bowersj2 828:
829: if (!defined($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:
1.83 ! bowersj2 1083: # Is it a multipart problem with a single part, now in
! 1084: # @parts with "0" filtered out? If so, forget it's a multi-part
! 1085: # problem and treat it like a single-part problem.
! 1086: if ( scalar(@parts) == 1 ) {
! 1087: $multipart = 0;
! 1088: }
! 1089:
1.66 bowersj2 1090: # Display one part, in event of network error.
1091: # If this is a single part, we can at least show the correct
1092: # status, but if it's multipart, we're lost.
1093: if ($curRes->{RESOURCE_ERROR}) {
1094: @parts = ("0");
1095: }
1096:
1097: # Step two: Show the parts
1.51 bowersj2 1098: foreach my $part (@parts) {
1.59 bowersj2 1099:
1.66 bowersj2 1100: my $deltalevel = 0; # for inserting the branch icon
1.68 bowersj2 1101: my $nonLinkedText = ""; # unlinked stuff after title
1.51 bowersj2 1102:
1103: # For each thing we're displaying...
1104:
1105: my $stack = $mapIterator->getStack();
1106: my $src = getLinkForResource($stack);
1107:
1108: my $srcHasQuestion = $src =~ /\?/;
1109: my $link = $src.
1110: ($srcHasQuestion?'&':'?') .
1111: 'symb='.&Apache::lonnet::escape($curRes->symb()).
1112: '"';
1113: my $title = $curRes->title();
1.81 bowersj2 1114: if (!$title) {
1115: $title = $curRes->src();
1116: $title = substr ($title, rindex($title, "/") + 1);
1117: }
1.51 bowersj2 1118: my $partLabel = "";
1.52 bowersj2 1119: my $newBranchText = "";
1120:
1121: # If this is a new branch, label it so
1122: # (temporary, this should be an icon w/ alt text)
1123: if ($isNewBranch) {
1.59 bowersj2 1124: $newBranchText = "<img src=\"/adm/lonIcons/branch.gif\" border=\"0\">";
1.52 bowersj2 1125: $isNewBranch = 0;
1.66 bowersj2 1126: $deltalevel = 1;
1.52 bowersj2 1127: }
1.51 bowersj2 1128:
1129: # links to open and close the folders
1130: my $linkopen = "<a href=\"$link\">";
1131: my $linkclose = "</a>";
1132:
1.61 bowersj2 1133: my $icon = "<img src=\"/adm/lonIcons/html.gif\" alt=\"\" border=\"0\" />";
1.51 bowersj2 1134: if ($curRes->is_problem()) {
1.66 bowersj2 1135: if ($part eq "0" || $condensed) {
1136: $icon = '<img src="/adm/lonIcons/problem.gif" alt="" border=\"0\" />';
1137: } else {
1138: $icon = $indentString;
1139: }
1.51 bowersj2 1140: }
1141:
1142: # Display the correct icon, link to open or shut map
1143: if ($curRes->is_map()) {
1144: my $mapId = $curRes->map_pc();
1.82 bowersj2 1145: my $nowOpen = (!defined($filterHash{$mapId}));
1146: if ($condition) {$nowOpen = !$nowOpen;}
1.51 bowersj2 1147: $icon = $nowOpen ?
1.77 bowersj2 1148: "navmap.folder.closed.gif" : "navmap.folder.open.gif";
1.66 bowersj2 1149: $icon = "<img src=\"/adm/lonIcons/$icon\" alt=\"\" border=\"0\" />";
1.52 bowersj2 1150: $linkopen = "<a href=\"/adm/navmaps?filter=";
1.66 bowersj2 1151: $linkopen .= ($nowOpen xor $condition) ?
1.51 bowersj2 1152: addToFilter(\%filterHash, $mapId) :
1153: removeFromFilter(\%filterHash, $mapId);
1.66 bowersj2 1154: $linkopen .= "&condition=$condition&$queryAdd\">";
1.51 bowersj2 1155: $linkclose = "</a>";
1.68 bowersj2 1156:
1.51 bowersj2 1157: }
1158:
1159: my $colorizer = "";
1160: if ($curRes->is_problem()) {
1161: my $status = $curRes->status($part);
1162: my $color = $colormap{$status};
1.74 bowersj2 1163:
1164: # Special case in the navmaps: If in less then
1165: # 24 hours, give it a bit of urgency
1.76 bowersj2 1166: if ($status == $curRes->OPEN() && $curRes->duedate() &&
1167: $curRes->duedate() < time()+(24*60*60) &&
1168: $curRes->duedate() > time()) {
1.74 bowersj2 1169: $color = $hurryUpColor;
1170: }
1.79 bowersj2 1171: # Special case: If this is the last try, and there is
1172: # more then one available, give a bit of urgency
1173: my $tries = $curRes->tries($part);
1174: my $maxtries = $curRes->maxtries($part);
1175: if ($tries && $maxtries && $maxtries > 1 &&
1176: $maxtries - $tries == 1) {
1177: $color = $hurryUpColor;
1178: }
1.51 bowersj2 1179: if ($color ne "") {
1180: $colorizer = "bgcolor=\"$color\"";
1181: }
1182: }
1183:
1.68 bowersj2 1184: if ($curRes->randomout()) {
1185: $nonLinkedText .= ' <i>(hidden)</i> ';
1186: }
1187:
1.66 bowersj2 1188: # FIRST COL: The resource indentation, branch icon, and name
1.77 bowersj2 1189: $r->print(" <tr><td align=\"left\" valign=\"center\">\n");
1.51 bowersj2 1190:
1191: # print indentation
1.59 bowersj2 1192: for (my $i = 0; $i < $indentLevel - $deltalevel; $i++) {
1.51 bowersj2 1193: $r->print($indentString);
1194: }
1195:
1.61 bowersj2 1196: $r->print(" ${newBranchText}${linkopen}$icon${linkclose}\n");
1.51 bowersj2 1197:
1.74 bowersj2 1198: my $curMarkerBegin = "";
1199: my $curMarkerEnd = "";
1200:
1201: # Is this the current resource?
1.78 bowersj2 1202: if ($curRes->src() eq $currenturl && !$displayedHereMarker) {
1.74 bowersj2 1203: $curMarkerBegin = '<a name="curloc" /><font color="red" size="+2">> </font>';
1204: $curMarkerEnd = '<font color="red" size="+2"> <</font>';
1.78 bowersj2 1205: $displayedHereMarker = 1;
1.74 bowersj2 1206: }
1207:
1.69 bowersj2 1208: if ($curRes->is_problem() && $part ne "0" && !$condensed) {
1.66 bowersj2 1209: $partLabel = " (Part $part)";
1210: $title = "";
1211: }
1.83 ! bowersj2 1212: if ($multipart && $condensed) {
1.68 bowersj2 1213: $nonLinkedText .= ' (' . $curRes->countParts() . ' parts)';
1.66 bowersj2 1214: }
1.59 bowersj2 1215:
1.74 bowersj2 1216: $r->print(" $curMarkerBegin<a href=\"$link\">$title$partLabel</a> $curMarkerEnd $nonLinkedText");
1.66 bowersj2 1217:
1218: if ($curRes->{RESOURCE_ERROR}) {
1219: $r->print(&Apache::loncommon::help_open_topic ("Navmap_Host_Down",
1220: '<font size="-1">Host down</font>'));
1221: }
1222:
1223: my $discussionHTML = ""; my $feedbackHTML = "";
1224:
1225: # SECOND COL: Is there text or feedback?
1226: if ($curRes->hasDiscussion()) {
1227: $discussionHTML = $linkopen .
1228: '<img border="0" src="/adm/lonMisc/chat.gif" />' .
1229: $linkclose;
1230: }
1231:
1232: if ($curRes->getFeedback()) {
1233: my $feedback = $curRes->getFeedback();
1234: foreach (split(/\,/, $feedback)) {
1235: if ($_) {
1236: $feedbackHTML .= ' <a href="/adm/email?display='
1237: . &Apache::lonnet::escape($_) . '">'
1238: . '<img src="/adm/lonMisc/feedback.gif" '
1239: . 'border="0" /></a>';
1240: }
1241: }
1242: }
1243:
1.77 bowersj2 1244: $r->print("<td align=\"left\" valign=\"center\">$discussionHTML$feedbackHTML</td>");
1.66 bowersj2 1245:
1246: # Is this the first displayed part of a multi-part problem
1247: # that has not been condensed, so we should suppress these two
1248: # columns?
1249: my $firstDisplayed = !$condensed && $multipart && $part eq "0";
1250:
1.69 bowersj2 1251: # THIRD COL: Problem status icon
1.66 bowersj2 1252: if ($curRes->is_problem() &&
1253: !$firstDisplayed) {
1254: my $icon = $statusIconMap{$curRes->status($part)};
1.69 bowersj2 1255: my $alt = $iconAltTags{$icon};
1.66 bowersj2 1256: if ($icon) {
1.77 bowersj2 1257: $r->print("<td valign=\"center\" width=\"50\" align=\"right\">$linkopen<img src=\"/adm/lonIcons/$icon\" border=\"0\" alt=\"$alt\" />$linkclose</td>\n");
1.66 bowersj2 1258: } else {
1259: $r->print("<td></td>\n");
1260: }
1261: } else { # not problem, no icon
1262: $r->print("<td></td>\n");
1263: }
1264:
1.69 bowersj2 1265: # FOURTH COL: Text description
1.77 bowersj2 1266: $r->print("<td $colorizer align=\"right\" valign=\"center\">\n");
1.51 bowersj2 1267:
1.61 bowersj2 1268: if ($curRes->kind() eq "res" &&
1269: $curRes->is_problem() &&
1.66 bowersj2 1270: !$firstDisplayed) {
1.53 bowersj2 1271: $r->print (getDescription($curRes, $part));
1.51 bowersj2 1272: }
1.68 bowersj2 1273: if ($curRes->is_map() && advancedUser() && $curRes->randompick()) {
1274: $r->print('(randomly select ' . $curRes->randompick() .')');
1275: }
1.59 bowersj2 1276:
1.66 bowersj2 1277: $r->print("</td></tr>\n");
1.51 bowersj2 1278: }
1279: }
1280: $curRes = $mapIterator->next();
1281: }
1282:
1283: $r->print("</table></body></html>");
1284:
1.59 bowersj2 1285: $navmap->untieHashes();
1286:
1.51 bowersj2 1287: return OK;
1288: }
1289:
1290: # Convenience functions: Returns a string that adds or subtracts
1291: # the second argument from the first hash, appropriate for the
1292: # query string that determines which folders to recurse on
1293: sub addToFilter {
1294: my $hashIn = shift;
1295: my $addition = shift;
1296: my %hash = %$hashIn;
1297: $hash{$addition} = 1;
1298:
1299: return join (",", keys(%hash));
1300: }
1301:
1302: sub removeFromFilter {
1303: my $hashIn = shift;
1304: my $subtraction = shift;
1305: my %hash = %$hashIn;
1306:
1307: delete $hash{$subtraction};
1308: return join(",", keys(%hash));
1309: }
1310:
1311: # Convenience function: Given a stack returned from getStack on the iterator,
1312: # return the correct src() value.
1313: # Later, this should add an anchor when we start putting anchors in pages.
1314: sub getLinkForResource {
1315: my $stack = shift;
1316: my $res;
1317:
1318: # Check to see if there are any pages in the stack
1319: foreach $res (@$stack) {
1320: if (defined($res) && $res->is_page()) {
1321: return $res->src();
1322: }
1323: }
1324:
1325: # Failing that, return the src of the last resource that is defined
1326: # (when we first recurse on a map, it puts an undefined resource
1327: # on the bottom because $self->{HERE} isn't defined yet, and we
1328: # want the src for the map anyhow)
1329: foreach (@$stack) {
1330: if (defined($_)) { $res = $_; }
1331: }
1332:
1333: return $res->src();
1334: }
1335:
1.53 bowersj2 1336: # Convenience function: This seperates the logic of how to create
1337: # the problem text strings ("Due: DATE", "Open: DATE", "Not yet assigned",
1338: # etc.) into a seperate function. It takes a resource object as the
1339: # first parameter, and the part number of the resource as the second.
1340: # It's basically a big switch statement on the status of the resource.
1341:
1342: sub getDescription {
1343: my $res = shift;
1344: my $part = shift;
1.69 bowersj2 1345: my $status = $res->status($part);
1.53 bowersj2 1346:
1347: if ($status == $res->NETWORK_FAILURE) { return ""; }
1348: if ($status == $res->NOTHING_SET) {
1349: return "Not currently assigned.";
1350: }
1351: if ($status == $res->OPEN_LATER) {
1.73 bowersj2 1352: return "Open " . timeToHumanString($res->opendate($part));
1.53 bowersj2 1353: }
1354: if ($status == $res->OPEN) {
1.79 bowersj2 1355: if ($res->duedate($part)) {
1.73 bowersj2 1356: return "Due " . timeToHumanString($res->duedate($part));
1.66 bowersj2 1357: } else {
1358: return "Open, no due date";
1359: }
1.53 bowersj2 1360: }
1.54 bowersj2 1361: if ($status == $res->PAST_DUE_ANSWER_LATER) {
1.73 bowersj2 1362: return "Answer open " . timeToHumanString($res->answerdate($part));
1.54 bowersj2 1363: }
1364: if ($status == $res->PAST_DUE_NO_ANSWER) {
1.73 bowersj2 1365: return "Was due " . timeToHumanString($res->duedate($part));
1.53 bowersj2 1366: }
1367: if ($status == $res->ANSWER_OPEN) {
1368: return "Answer available";
1369: }
1.59 bowersj2 1370: if ($status == $res->EXCUSED) {
1.66 bowersj2 1371: return "Excused by instructor";
1.59 bowersj2 1372: }
1.69 bowersj2 1373: if ($status == $res->ATTEMPTED) {
1374: return "Not yet graded.";
1375: }
1.59 bowersj2 1376: if ($status == $res->TRIES_LEFT) {
1.79 bowersj2 1377: my $tries = $res->tries($part);
1378: my $maxtries = $res->maxtries($part);
1379: my $triesString = "";
1380: if ($tries && $maxtries) {
1381: $triesString = "<font size=\"-1\"><i>($tries of $maxtries tries used)</i></font>";
1382: if ($maxtries > 1 && $maxtries - $tries == 1) {
1383: $triesString = "<b>$triesString</b>";
1384: }
1385: }
1.66 bowersj2 1386: if ($res->duedate()) {
1.73 bowersj2 1387: return "Due " . timeToHumanString($res->duedate($part)) .
1.66 bowersj2 1388: " $triesString";
1389: } else {
1390: return "No due date $triesString";
1391: }
1.59 bowersj2 1392: }
1.53 bowersj2 1393: }
1394:
1.68 bowersj2 1395: sub advancedUser {
1396: return $ENV{'user.adv'};
1397: }
1398:
1.73 bowersj2 1399:
1400: # timeToHumanString takes a time number and converts it to a
1401: # human-readable representation, meant to be used in the following
1402: # manner:
1403: # print "Due $timestring"
1404: # print "Open $timestring"
1405: # print "Answer available $timestring"
1406: # Very, very, very, VERY English-only... goodness help a localizer on
1407: # this func...
1.53 bowersj2 1408: sub timeToHumanString {
1.58 albertel 1409: my ($time) = @_;
1410: # zero, '0' and blank are bad times
1.73 bowersj2 1411: if (!$time) {
1412: return 'never';
1413: }
1414:
1415: my $now = time();
1416:
1417: my @time = localtime($time);
1418: my @now = localtime($now);
1419:
1420: # Positive = future
1421: my $delta = $time - $now;
1422:
1423: my $minute = 60;
1424: my $hour = 60 * $minute;
1425: my $day = 24 * $hour;
1426: my $week = 7 * $day;
1427: my $inPast = 0;
1428:
1429: # Logic in comments:
1430: # Is it now? (extremely unlikely)
1431: if ( $delta == 0 ) {
1432: return "this instant";
1433: }
1434:
1435: if ($delta < 0) {
1436: $inPast = 1;
1437: $delta = -$delta;
1438: }
1439:
1440: # Is it in the future?
1441: if ( $delta > 0 ) {
1442: # Is it less then a minute away?
1443: my $tense = $inPast ? " ago" : "";
1444: my $prefix = $inPast ? "" : "in ";
1445: if ( $delta < $minute ) {
1446: if ($delta == 1) { return "${prefix}1 second$tense"; }
1447: return "$prefix$delta seconds$tense";
1448: }
1449:
1450: # Is it less then an hour away?
1451: if ( $delta < $hour ) {
1452: # If so, use minutes
1453: my $minutes = floor($delta / 60);
1454: if ($minutes == 1) { return "${prefix}1 minute$tense"; }
1455: return "$prefix$minutes minutes$tense";
1456: }
1457:
1458: # Is it less then 24 hours away? If so,
1459: # display hours + minutes
1460: if ( $delta < $hour * 24) {
1461: my $hours = floor($delta / $hour);
1462: my $minutes = floor(($delta % $hour) / $minute);
1463: my $hourString = "$hours hours";
1464: my $minuteString = ", $minutes minutes";
1465: if ($hours == 1) {
1466: $hourString = "1 hour";
1467: }
1468: if ($minutes == 1) {
1469: $minuteString = ", 1 minute";
1470: }
1471: if ($minutes == 0) {
1472: $minuteString = "";
1473: }
1474: return "$prefix$hourString$minuteString$tense";
1475: }
1476:
1477: # Less then 5 days away, display day of the week and
1478: # HH:MM
1479: if ( $delta < $day * 5 ) {
1480: my $timeStr = strftime("%A at %I:%M %P", localtime($time));
1481: $timeStr =~ s/12:00 am/midnight/;
1482: $timeStr =~ s/12:00 pm/noon/;
1483: return ($inPast ? "last " : "next ") .
1484: $timeStr;
1485: }
1486:
1487: # Is it this year?
1488: if ( $time[5] == $now[5]) {
1489: # Return on Month Day, HH:MM meridian
1490: my $timeStr = strftime("on %A, %b %e at %I:%M %P", localtime($time));
1491: $timeStr =~ s/12:00 am/midnight/;
1492: $timeStr =~ s/12:00 pm/noon/;
1493: return $timeStr;
1494: }
1495:
1496: # Not this year, so show the year
1497: my $timeStr = strftime("on %A, %b %e %G at %I:%M %P", localtime($time));
1498: $timeStr =~ s/12:00 am/midnight/;
1499: $timeStr =~ s/12:00 pm/noon/;
1500: return $timeStr;
1.58 albertel 1501: }
1.53 bowersj2 1502: }
1503:
1.51 bowersj2 1504: 1;
1505:
1506: package Apache::lonnavmaps::navmap;
1507:
1508: =pod
1509:
1510: 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.
1511:
1512: =head1 navmap object: Encapsulating the compiled nav map
1513:
1514: navmap is an object that encapsulates a compiled course map and provides a reasonable interface to it.
1515:
1516: 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.
1517:
1518: You must obtain resource objects through the navmap object.
1519:
1520: =head2 Methods
1521:
1522: =over 4
1523:
1.70 bowersj2 1524: =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 1525:
1526: =item * B<getIterator>(first, finish, filter, condition): See iterator documentation below.
1527:
1528: =cut
1529:
1530: use strict;
1531: use GDBM_File;
1532:
1533: sub new {
1534: # magic invocation to create a class instance
1535: my $proto = shift;
1536: my $class = ref($proto) || $proto;
1537: my $self = {};
1538:
1539: $self->{NAV_HASH_FILE} = shift;
1540: $self->{PARM_HASH_FILE} = shift;
1541: $self->{GENERATE_COURSE_USER_OPT} = shift;
1.55 bowersj2 1542: $self->{GENERATE_EMAIL_DISCUSS_STATUS} = shift;
1.51 bowersj2 1543:
1544: # Resource cache stores navmapresource's as we reference them. We generate
1545: # them on-demand so we don't pay for creating resources unless we use them.
1546: $self->{RESOURCE_CACHE} = {};
1547:
1548: # Network failure flag, if we accessed the course or user opt and
1549: # failed
1550: $self->{NETWORK_FAILURE} = 0;
1551:
1552: # tie the nav hash
1553: my %navmaphash;
1554: if (!(tie(%navmaphash, 'GDBM_File', $self->{NAV_HASH_FILE},
1555: &GDBM_READER(), 0640))) {
1556: return undef;
1557: }
1558: $self->{NAV_HASH} = \%navmaphash;
1559:
1560: my %parmhash;
1561: if (!(tie(%parmhash, 'GDBM_File', $self->{PARM_HASH_FILE},
1562: &GDBM_READER(), 0640)))
1563: {
1.66 bowersj2 1564: untie $self->{PARM_HASH};
1.51 bowersj2 1565: return undef;
1566: }
1567: $self->{PARM_HASH} = \%parmhash;
1568: $self->{HASH_TIED} = 1;
1569:
1570: # If the course opt hash and the user opt hash should be generated,
1571: # generate them
1572: if ($self->{GENERATE_COURSE_USER_OPT}) {
1573: my $uname=$ENV{'user.name'};
1574: my $udom=$ENV{'user.domain'};
1575: my $uhome=$ENV{'user.home'};
1576: my $cid=$ENV{'request.course.id'};
1577: my $chome=$ENV{'course.'.$cid.'.home'};
1578: my ($cdom,$cnum)=split(/\_/,$cid);
1579:
1580: my $userprefix=$uname.'_'.$udom.'_';
1581:
1582: my %courserdatas; my %useropt; my %courseopt;
1583: unless ($uhome eq 'no_host') {
1584: # ------------------------------------------------- Get coursedata (if present)
1585: unless ((time-$courserdatas{$cid.'.last_cache'})<240) {
1586: my $reply=&Apache::lonnet::reply('dump:'.$cdom.':'.$cnum.
1587: ':resourcedata',$chome);
1588: if ($reply!~/^error\:/) {
1589: $courserdatas{$cid}=$reply;
1590: $courserdatas{$cid.'.last_cache'}=time;
1591: }
1592: # check to see if network failed
1593: elsif ( $reply=~/no.such.host/i || $reply=~/con.*lost/i )
1594: {
1595: $self->{NETWORK_FAILURE} = 1;
1596: }
1597: }
1598: foreach (split(/\&/,$courserdatas{$cid})) {
1599: my ($name,$value)=split(/\=/,$_);
1600: $courseopt{$userprefix.&Apache::lonnet::unescape($name)}=
1601: &Apache::lonnet::unescape($value);
1602: }
1603: # --------------------------------------------------- Get userdata (if present)
1604: unless ((time-$userrdatas{$uname.'___'.$udom.'.last_cache'})<240) {
1605: my $reply=&Apache::lonnet::reply('dump:'.$udom.':'.$uname.':resourcedata',$uhome);
1606: if ($reply!~/^error\:/) {
1607: $userrdatas{$uname.'___'.$udom}=$reply;
1608: $userrdatas{$uname.'___'.$udom.'.last_cache'}=time;
1609: }
1610: # check to see if network failed
1611: elsif ( $reply=~/no.such.host/i || $reply=~/con.*lost/i )
1612: {
1613: $self->{NETWORK_FAILURE} = 1;
1614: }
1615: }
1616: foreach (split(/\&/,$userrdatas{$uname.'___'.$udom})) {
1617: my ($name,$value)=split(/\=/,$_);
1618: $useropt{$userprefix.&Apache::lonnet::unescape($name)}=
1619: &Apache::lonnet::unescape($value);
1620: }
1.55 bowersj2 1621: $self->{COURSE_OPT} = \%courseopt;
1622: $self->{USER_OPT} = \%useropt;
1.51 bowersj2 1623: }
1624: }
1625:
1.55 bowersj2 1626: if ($self->{GENERATE_EMAIL_DISCUSS_STATUS}) {
1627: my $cid=$ENV{'request.course.id'};
1628: my ($cdom,$cnum)=split(/\_/,$cid);
1629:
1630: my %emailstatus = &Apache::lonnet::dump('email_status');
1.56 bowersj2 1631: my $logoutTime = $emailstatus{'logout'};
1632: my $courseLeaveTime = $emailstatus{'logout_'.$ENV{'request.course.id'}};
1.55 bowersj2 1633: $self->{LAST_CHECK} = ($courseLeaveTime > $logoutTime ?
1634: $courseLeaveTime : $logoutTime);
1.56 bowersj2 1635: my %discussiontime = &Apache::lonnet::dump('discussiontimes',
1.55 bowersj2 1636: $cdom, $cnum);
1637: my %feedback=();
1638: my %error=();
1639: my $keys = &Apache::lonnet::reply('keys:'.
1640: $ENV{'user.domain'}.':'.
1641: $ENV{'user.name'}.':nohist_email',
1642: $ENV{'user.home'});
1643:
1644: foreach my $msgid (split(/\&/, $keys)) {
1645: $msgid=&Apache::lonnet::unescape($msgid);
1646: my $plain=&Apache::lonnet::unescape(&Apache::lonnet::unescape($msgid));
1647: if ($plain=~/(Error|Feedback) \[([^\]]+)\]/) {
1648: my ($what,$url)=($1,$2);
1649: my %status=
1650: &Apache::lonnet::get('email_status',[$msgid]);
1651: if ($status{$msgid}=~/^error\:/) {
1652: $status{$msgid}='';
1653: }
1654:
1655: if (($status{$msgid} eq 'new') ||
1656: (!$status{$msgid})) {
1657: if ($what eq 'Error') {
1658: $error{$url}.=','.$msgid;
1659: } else {
1660: $feedback{$url}.=','.$msgid;
1661: }
1662: }
1663: }
1664: }
1665:
1666: $self->{FEEDBACK} = \%feedback;
1667: $self->{ERROR_MSG} = \%error; # what is this? JB
1668: $self->{DISCUSSION_TIME} = \%discussiontime;
1669: $self->{EMAIL_STATUS} = \%emailstatus;
1670:
1671: }
1672:
1.51 bowersj2 1673: bless($self);
1.55 bowersj2 1674:
1675: return $self;
1676: }
1.51 bowersj2 1677:
1.55 bowersj2 1678: # Checks to see if coursemap is defined, matching test in old lonnavmaps
1679: sub courseMapDefined {
1680: my $self = shift;
1681: my $uri = &Apache::lonnet::clutter($ENV{'request.course.uri'});
1682:
1.56 bowersj2 1683: my $firstres = $self->{NAV_HASH}->{"map_start_$uri"};
1684: my $lastres = $self->{NAV_HASH}->{"map_finish_$uri"};
1.55 bowersj2 1685: return $firstres && $lastres;
1.51 bowersj2 1686: }
1687:
1688: sub getIterator {
1689: my $self = shift;
1690: my $iterator = Apache::lonnavmaps::iterator->new($self, shift, shift,
1.63 bowersj2 1691: shift, undef, shift);
1.51 bowersj2 1692: return $iterator;
1693: }
1694:
1695: # unties the hash when done
1696: sub untieHashes {
1697: my $self = shift;
1.60 bowersj2 1698: untie %{$self->{NAV_HASH}} if ($self->{HASH_TIED});
1699: untie %{$self->{PARM_HASH}} if ($self->{HASH_TIED});
1.51 bowersj2 1700: $self->{HASH_TIED} = 0;
1701: }
1702:
1703: # when the object is destroyed, be sure to untie all the hashes we tied.
1704: sub DESTROY {
1705: my $self = shift;
1706: $self->untieHashes();
1707: }
1708:
1.59 bowersj2 1709: # Private function: Does the given resource (as a symb string) have
1710: # current discussion? Returns 0 if chat/mail data not extracted.
1711: sub hasDiscussion {
1712: my $self = shift;
1713: my $symb = shift;
1714: if (!defined($self->{DISCUSSION_TIME})) { return 0; }
1715:
1716: return $self->{DISCUSSION_TIME}->{$symb} >
1.66 bowersj2 1717: $self->{LAST_CHECK};
1.59 bowersj2 1718: }
1719:
1720: # Private function: Does the given resource (as a symb string) have
1721: # current feedback? Returns the string in the feedback hash, which
1722: # will be false if it does not exist.
1723: sub getFeedback {
1724: my $self = shift;
1725: my $symb = shift;
1726:
1727: if (!defined($self->{FEEDBACK})) { return ""; }
1728:
1729: return $self->{FEEDBACK}->{$symb};
1730: }
1731:
1.51 bowersj2 1732: =pod
1733:
1734: =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.
1735:
1736: =cut
1737:
1738: # The strategy here is to cache the resource objects, and only construct them
1739: # as we use them. The real point is to prevent reading any more from the tied
1740: # hash then we have to, which should hopefully alleviate speed problems.
1741: # Caching is just an incidental detail I throw in because it makes sense.
1742:
1743: sub getById {
1744: my $self = shift;
1745: my $id = shift;
1746:
1747: if (defined ($self->{RESOURCE_CACHE}->{$id}))
1748: {
1749: return $self->{RESOURCE_CACHE}->{$id};
1750: }
1751:
1752: # resource handles inserting itself into cache.
1753: return Apache::lonnavmaps::resource->new($self, $id);
1754: }
1755:
1756: =pod
1757:
1758: =item * B<firstResource>(): Returns a resource object reference corresponding to the first resource in the navmap.
1759:
1760: =cut
1761:
1762: sub firstResource {
1763: my $self = shift;
1764: my $firstResource = $self->{NAV_HASH}->{'map_start_' .
1765: &Apache::lonnet::clutter($ENV{'request.course.uri'})};
1766: return $self->getById($firstResource);
1767: }
1768:
1769: =pod
1770:
1771: =item * B<finishResource>(): Returns a resource object reference corresponding to the last resource in the navmap.
1772:
1773: =cut
1774:
1775: sub finishResource {
1776: my $self = shift;
1777: my $firstResource = $self->{NAV_HASH}->{'map_finish_' .
1778: &Apache::lonnet::clutter($ENV{'request.course.uri'})};
1779: return $self->getById($firstResource);
1780: }
1781:
1782: # -------------------------------------------- Figure out a cascading parameter
1783: #
1784: # For this function to work
1785: #
1786: # * parmhash needs to be tied
1787: # * courseopt and useropt need to be initialized for this user and course
1788: #
1789:
1790: sub parmval {
1791: my $self = shift;
1792: my ($what,$symb)=@_;
1793: my $cid=$ENV{'request.course.id'};
1794: my $csec=$ENV{'request.course.sec'};
1795: my $uname=$ENV{'user.name'};
1796: my $udom=$ENV{'user.domain'};
1797:
1798: unless ($symb) { return ''; }
1799: my $result='';
1800:
1801: my ($mapname,$id,$fn)=split(/\_\_\_/,$symb);
1802:
1803: # ----------------------------------------------------- Cascading lookup scheme
1804: my $rwhat=$what;
1805: $what=~s/^parameter\_//;
1806: $what=~s/\_/\./;
1807:
1808: my $symbparm=$symb.'.'.$what;
1809: my $mapparm=$mapname.'___(all).'.$what;
1810: my $usercourseprefix=$uname.'_'.$udom.'_'.$cid;
1811:
1812: my $seclevel= $usercourseprefix.'.['.$csec.'].'.$what;
1813: my $seclevelr=$usercourseprefix.'.['.$csec.'].'.$symbparm;
1814: my $seclevelm=$usercourseprefix.'.['.$csec.'].'.$mapparm;
1815:
1816: my $courselevel= $usercourseprefix.'.'.$what;
1817: my $courselevelr=$usercourseprefix.'.'.$symbparm;
1818: my $courselevelm=$usercourseprefix.'.'.$mapparm;
1819:
1820: my $useropt = $self->{USER_OPT};
1821: my $courseopt = $self->{COURSE_OPT};
1822: my $parmhash = $self->{PARM_HASH};
1823:
1824: # ---------------------------------------------------------- first, check user
1825: if ($uname and defined($useropt)) {
1.57 albertel 1826: if (defined($$useropt{$courselevelr})) { return $$useropt{$courselevelr}; }
1827: if (defined($$useropt{$courselevelm})) { return $$useropt{$courselevelm}; }
1828: if (defined($$useropt{$courselevel})) { return $$useropt{$courselevel}; }
1.51 bowersj2 1829: }
1830:
1831: # ------------------------------------------------------- second, check course
1832: if ($csec and defined($courseopt)) {
1.57 albertel 1833: if (defined($$courseopt{$seclevelr})) { return $$courseopt{$seclevelr}; }
1834: if (defined($$courseopt{$seclevelm})) { return $$courseopt{$seclevelm}; }
1835: if (defined($$courseopt{$seclevel})) { return $$courseopt{$seclevel}; }
1.51 bowersj2 1836: }
1837:
1838: if (defined($courseopt)) {
1.57 albertel 1839: if (defined($$courseopt{$courselevelr})) { return $$courseopt{$courselevelr}; }
1840: if (defined($$courseopt{$courselevelm})) { return $$courseopt{$courselevelm}; }
1841: if (defined($$courseopt{$courselevel})) { return $$courseopt{$courselevel}; }
1.51 bowersj2 1842: }
1843:
1844: # ----------------------------------------------------- third, check map parms
1845:
1846: my $thisparm=$$parmhash{$symbparm};
1.57 albertel 1847: if (defined($thisparm)) { return $thisparm; }
1.51 bowersj2 1848:
1849: # ----------------------------------------------------- fourth , check default
1850:
1851: my $default=&Apache::lonnet::metadata($fn,$rwhat.'.default');
1.57 albertel 1852: if (defined($default)) { return $default}
1.51 bowersj2 1853:
1854: # --------------------------------------------------- fifth , cascade up parts
1855:
1856: my ($space,@qualifier)=split(/\./,$rwhat);
1857: my $qualifier=join('.',@qualifier);
1858: unless ($space eq '0') {
1859: my ($part,$id)=split(/\_/,$space);
1860: if ($id) {
1861: my $partgeneral=$self->parmval($part.".$qualifier",$symb);
1.57 albertel 1862: if (defined($partgeneral)) { return $partgeneral; }
1.51 bowersj2 1863: } else {
1864: my $resourcegeneral=$self->parmval("0.$qualifier",$symb);
1.57 albertel 1865: if (defined($resourcegeneral)) { return $resourcegeneral; }
1.51 bowersj2 1866: }
1867: }
1868: return '';
1869: }
1870:
1871:
1872: 1;
1873:
1874: package Apache::lonnavmaps::iterator;
1875:
1876: # This package must precede "navmap" because "navmap" uses it. In
1877: # order to keep the documentation order straight, the iterator is documented
1878: # after the navmap object.
1879:
1880: =pod
1881:
1882: =back
1883:
1884: =head1 navmap Iterator
1885:
1886: 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.
1887:
1888: 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:
1889:
1890: C<my $resourceIterator = $navmap-E<gt>getIterator();>
1891:
1892: To get the next thing from the iterator, call B<next>:
1893:
1894: C<my $nextThing = $resourceIterator-E<gt>next()>
1895:
1896: getIterator behaves as follows:
1897:
1898: =over 4
1899:
1.70 bowersj2 1900: =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 1901:
1.70 bowersj2 1902: 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 1903:
1904: 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:
1905:
1906: =over 4
1907:
1.70 bowersj2 1908: =item * BEGIN_MAP: A new map is being recursed into. This is returned I<after> the map resource itself is returned.
1909:
1910: =item * END_MAP: The map is now done.
1911:
1912: =item * BEGIN_BRANCH: A branch is now starting. The next resource returned will be the first in that branch.
1913:
1914: =item * END_BRANCH: The branch is now done.
1.51 bowersj2 1915:
1916: =back
1917:
1.70 bowersj2 1918: The tokens are retreivable via methods on the iterator object, i.e., $iterator->END_MAP.
1919:
1920: =back
1.51 bowersj2 1921:
1922: =cut
1923:
1924: # Here are the tokens for the iterator:
1925:
1926: sub BEGIN_MAP { return 1; } # begining of a new map
1927: sub END_MAP { return 2; } # end of the map
1928: sub BEGIN_BRANCH { return 3; } # beginning of a branch
1929: sub END_BRANCH { return 4; } # end of a branch
1930:
1931: # Params: nav map, start resource, end resource, filter, condition,
1932: # already seen hash ref
1933:
1934: sub new {
1935: # magic invocation to create a class instance
1936: my $proto = shift;
1937: my $class = ref($proto) || $proto;
1938: my $self = {};
1939:
1940: $self->{NAV_MAP} = shift;
1941: return undef unless ($self->{NAV_MAP});
1942:
1943: # Handle the parameters
1944: $self->{FIRST_RESOURCE} = shift || $self->{NAV_MAP}->firstResource();
1945: $self->{FINISH_RESOURCE} = shift || $self->{NAV_MAP}->finishResource();
1946:
1947: # If the given resources are just the ID of the resource, get the
1948: # objects
1949: if (!ref($self->{FIRST_RESOURCE})) { $self->{FIRST_RESOURCE} =
1950: $self->{NAV_MAP}->getById($self->{FIRST_RESOURCE}); }
1951: if (!ref($self->{FINISH_RESOURCE})) { $self->{FINISH_RESOURCE} =
1952: $self->{NAV_MAP}->getById($self->{FINISH_RESOURCE}); }
1953:
1954: $self->{FILTER} = shift;
1955:
1956: # A hash, used as a set, of resource already seen
1957: $self->{ALREADY_SEEN} = shift;
1958: if (!defined($self->{ALREADY_SEEN})) { $self->{ALREADY_SEEN} = {} };
1.63 bowersj2 1959: $self->{CONDITION} = shift;
1.51 bowersj2 1960:
1961: # Flag: Have we started yet? If not, the first action is to return BEGIN_MAP.
1962: $self->{STARTED} = 0;
1963:
1964: # Should we continue calling the recursive iterator, if any?
1965: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
1966: # The recursive iterator, if any
1967: $self->{RECURSIVE_ITERATOR} = undef;
1968: # Are we recursing on a map, or a branch?
1969: $self->{RECURSIVE_MAP} = 1; # we'll manually unset this when recursing on branches
1970: # And the count of how deep it is, so that this iterator can keep track of
1971: # when to pick back up again.
1972: $self->{RECURSIVE_DEPTH} = 0;
1973:
1974: # For keeping track of our branches, we maintain our own stack
1975: $self->{BRANCH_STACK} = [];
1976: # If the size shrinks, we exhausted a branch
1977: $self->{BRANCH_STACK_SIZE} = 0;
1978: $self->{BRANCH_DEPTH} = 0;
1979:
1980: # For returning two things in a forced sequence
1981: $self->{FORCE_NEXT} = undef;
1982:
1983: # Start with the first resource
1984: push @{$self->{BRANCH_STACK}}, $self->{FIRST_RESOURCE};
1985: $self->{BRANCH_STACK_SIZE} = 1;
1986:
1987: bless($self);
1988: return $self;
1989: }
1990:
1991: # Note... this function is *touchy*. I strongly recommend tracing
1992: # through it with the debugger a few times on a non-trivial map before
1993: # modifying it. Order is *everything*.
1994: sub next {
1995: my $self = shift;
1996:
1997: # Iterator logic goes here
1998:
1999: # Are we using a recursive iterator? If so, pull from that and
2000: # watch the depth; we want to resume our level at the correct time.
2001: if ($self->{RECURSIVE_ITERATOR_FLAG})
2002: {
2003: # grab the next from the recursive iterator
2004: my $next = $self->{RECURSIVE_ITERATOR}->next();
2005:
2006: # is it a begin or end map? Update depth if so
2007: if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
2008: if ($next == END_MAP() ) { $self->{RECURSIVE_DEPTH}--; }
2009:
2010: # Are we back at depth 0? If so, stop recursing.
2011: if ($self->{RECURSIVE_DEPTH} == 0) {
2012: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
2013: }
2014:
2015: return $next;
2016: }
2017:
1.68 bowersj2 2018: # Is this return value pre-determined?
2019: if (defined($self->{FORCE_NEXT})) {
2020: my $tmp = $self->{FORCE_NEXT};
2021: $self->{FORCE_NEXT} = undef;
2022: return $tmp;
2023: }
2024:
1.51 bowersj2 2025: # Is there a current resource to grab? If not, then return
2026: # END_BRANCH and END_MAP in succession.
2027: if (scalar(@{$self->{BRANCH_STACK}}) == 0) {
2028: if ($self->{BRANCH_DEPTH} > 0) {
2029: $self->{FORCE_NEXT} = $self->END_MAP();
1.52 bowersj2 2030: $self->{BRANCH_DEPTH}--;
1.51 bowersj2 2031: return $self->END_BRANCH();
2032: } else {
2033: return $self->END_MAP();
2034: }
2035: }
2036:
2037: # Have we not yet begun? If not, return BEGIN_MAP and
2038: # remember that we've started.
2039: if ( !$self->{STARTED} ) {
2040: $self->{STARTED} = 1;
2041: return $self->BEGIN_MAP;
2042: }
2043:
2044: # Did the branch stack shrink since last run? If so,
2045: # we exhausted a branch last time, therefore, we're about
2046: # to start a new one. (We know because we already checked to see
2047: # if the stack was empty.)
2048: if ( scalar (@{$self->{BRANCH_STACK}}) < $self->{BRANCH_STACK_SIZE}) {
1.52 bowersj2 2049: $self->{BRANCH_STACK_SIZE} = scalar(@{$self->{BRANCH_STACK}});
2050: $self->{BRANCH_DEPTH}++;
2051: return $self->BEGIN_BRANCH();
1.51 bowersj2 2052: }
2053:
1.52 bowersj2 2054: # Remember the size for comparision next time.
2055: $self->{BRANCH_STACK_SIZE} = scalar(@{$self->{BRANCH_STACK}});
2056:
2057: # If the next resource we mean to return is going to need
2058: # a lower branch level, terminate branches until we get
2059: # there.
2060:
1.51 bowersj2 2061: # Get the next resource in the branch
2062: $self->{HERE} = pop @{$self->{BRANCH_STACK}};
1.52 bowersj2 2063:
2064: # Are we at the right depth? If not, close a branch and return
2065: # the current resource onto the branch stack
2066: if (defined($self->{HERE}->{DATA}->{ITERATOR_DEPTH})
2067: && $self->{HERE}->{DATA}->{ITERATOR_DEPTH} <
2068: $self->{BRANCH_DEPTH} ) {
2069: $self->{BRANCH_DEPTH}--;
2070: # return it so we can pick it up eventually
2071: push @{$self->{BRANCH_STACK}}, $self->{HERE};
2072: return $self->END_BRANCH();
2073: }
2074:
1.51 bowersj2 2075: # We always return it after this point and never before
2076: # (proof: look at just the return statements), so we
2077: # remember that we've seen this.
2078: $self->{ALREADY_SEEN}->{$self->{HERE}->{ID}} = 1;
2079:
2080: # Get the next possible resources
2081: my $nextUnfiltered = $self->{HERE}->getNext();
2082: my $next = [];
2083:
2084: # filter the next possibilities to remove things we've
1.52 bowersj2 2085: # already seen. Also, remember what branch depth they should
2086: # be displayed at, since there's no other reliable way to tell.
1.51 bowersj2 2087: foreach (@$nextUnfiltered) {
1.52 bowersj2 2088: if (!defined($self->{ALREADY_SEEN}->{$_->{ID}})) {
2089: push @$next, $_;
2090: $_->{DATA}->{ITERATOR_DEPTH} =
2091: $self->{BRANCH_DEPTH} + 1;
2092: }
1.51 bowersj2 2093: }
2094:
2095: # Handle branch cases:
2096: # Nothing is available next: BRANCH_END
2097: # 1 thing next: standard non-branch
2098: # 2+ things next: have some branches
2099: my $nextCount = scalar(@$next);
2100: if ($nextCount == 0) {
1.52 bowersj2 2101: # Return this and on the next run, close the branch up if we're
2102: # in a branch
2103: if ($self->{BRANCH_DEPTH} > 0 ) {
2104: $self->{FORCE_NEXT} = $self->END_BRANCH();
2105: $self->{BRANCH_DEPTH}--;
2106: }
1.51 bowersj2 2107: }
2108:
2109: while (@$next) {
2110: # copy the next possibilities over to the branch stack
2111: # in the right order
1.52 bowersj2 2112: push @{$self->{BRANCH_STACK}}, shift @$next;
1.51 bowersj2 2113: }
2114:
2115: if ($nextCount >= 2) {
1.52 bowersj2 2116: $self->{FORCE_NEXT} = $self->BEGIN_BRANCH();
2117: $self->{BRANCH_DEPTH}++;
1.51 bowersj2 2118: return $self->{HERE};
2119: }
2120:
2121: # If this is a map and we want to recurse down it... (not filtered out)
1.70 bowersj2 2122: if ($self->{HERE}->is_map() &&
1.63 bowersj2 2123: (defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {
1.51 bowersj2 2124: $self->{RECURSIVE_ITERATOR_FLAG} = 1;
2125: my $firstResource = $self->{HERE}->map_start();
2126: my $finishResource = $self->{HERE}->map_finish();
2127:
2128: $self->{RECURSIVE_ITERATOR} =
2129: Apache::lonnavmaps::iterator->new ($self->{NAV_MAP}, $firstResource,
1.63 bowersj2 2130: $finishResource, $self->{FILTER}, $self->{ALREADY_SEEN},
1.66 bowersj2 2131: $self->{CONDITION});
1.51 bowersj2 2132: }
2133:
2134: return $self->{HERE};
2135: }
2136:
2137: =pod
2138:
2139: 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).
2140:
2141: =cut
2142:
2143: sub getStack {
2144: my $self=shift;
2145:
2146: my @stack;
2147:
2148: $self->populateStack(\@stack);
2149:
2150: return \@stack;
2151: }
2152:
2153: # Private method: Calls the iterators recursively to populate the stack.
2154: sub populateStack {
2155: my $self=shift;
2156: my $stack = shift;
2157:
2158: push @$stack, $self->{HERE};
2159:
2160: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
2161: $self->{RECURSIVE_ITERATOR}->populateStack($stack);
2162: }
2163: }
2164:
1.1 www 2165: 1;
1.2 www 2166:
1.51 bowersj2 2167: package Apache::lonnavmaps::resource;
2168:
2169: use Apache::lonnet;
2170:
2171: =pod
2172:
2173: =head1 Object: resource
2174:
2175: 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.
2176:
2177: A resource only makes sense in the context of a navmap, as some of the data is stored in the navmap object.
2178:
2179: You will probably never need to instantiate this object directly. Use Apache::lonnavmap::navmap, and use the "start" method to obtain the starting resource.
2180:
2181: =head2 Public Members
2182:
2183: resource objects have a hash called DATA ($resourceRef->{DATA}) that you can store whatever you want in. This allows you to easily do two-pass algorithms without worrying about managing your own resource->data hash.
2184:
2185: =head2 Methods
2186:
2187: =over 4
2188:
1.70 bowersj2 2189: =item * B<new>($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.
2190:
2191: =back
1.51 bowersj2 2192:
2193: =cut
2194:
2195: sub new {
2196: # magic invocation to create a class instance
2197: my $proto = shift;
2198: my $class = ref($proto) || $proto;
2199: my $self = {};
2200:
2201: $self->{NAV_MAP} = shift;
2202: $self->{ID} = shift;
2203:
2204: # Store this new resource in the parent nav map's cache.
2205: $self->{NAV_MAP}->{RESOURCE_CACHE}->{$self->{ID}} = $self;
1.66 bowersj2 2206: $self->{RESOURCE_ERROR} = 0;
1.51 bowersj2 2207:
2208: # A hash that can be used by two-pass algorithms to store data
2209: # about this resource in. Not used by the resource object
2210: # directly.
2211: $self->{DATA} = {};
2212:
2213: bless($self);
2214:
2215: return $self;
2216: }
2217:
1.70 bowersj2 2218: # private function: simplify the NAV_HASH lookups we keep doing
2219: # pass the name, and to automatically append my ID, pass a true val on the
2220: # second param
2221: sub navHash {
2222: my $self = shift;
2223: my $param = shift;
2224: my $id = shift;
2225: return $self->{NAV_MAP}->{NAV_HASH}->{$param . ($id?$self->{ID}:"")};
2226: }
2227:
1.51 bowersj2 2228: =pod
2229:
1.70 bowersj2 2230: B<Metadata Retreival>
2231:
2232: These are methods that help you retrieve metadata about the resource:
2233:
2234: =over 4
2235:
2236: =item * B<ext>: Returns true if the resource is external.
2237:
2238: =item * B<goesto>: Returns the "goesto" value from the compiled nav map. (It is likely you want to use B<getNext> instead.)
2239:
2240: =item * B<kind>: Returns the kind of the resource from the compiled nav map.
2241:
2242: =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 2243:
1.70 bowersj2 2244: =item * B<randompick>: Returns true for a map if the randompick feature is being used on the map. (?)
2245:
2246: =item * B<src>: Returns the source for the resource.
2247:
2248: =item * B<symb>: Returns the symb for the resource.
2249:
2250: =item * B<title>: Returns the title of the resource.
2251:
2252: =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 2253:
2254: =item * B<type>: Returns the type of the resource, "start", "normal", or "finish".
2255:
2256: =back
2257:
2258: =cut
2259:
2260: # These info functions can be used directly, as they don't return
2261: # resource information.
1.70 bowersj2 2262: sub ext { my $self=shift; return $self->navHash("ext_", 1) eq 'true:'; }
1.51 bowersj2 2263: sub goesto { my $self=shift; return $self->navHash("goesto_", 1); }
2264: sub kind { my $self=shift; return $self->navHash("kind_", 1); }
1.68 bowersj2 2265: sub randomout { my $self=shift; return $self->navHash("randomout_", 1); }
2266: sub randompick {
2267: my $self = shift;
2268: return $self->{NAV_MAP}->{PARM_HASH}->{$self->symb .
2269: '.0.parameter_randompick'};
2270: }
1.51 bowersj2 2271: sub src {
2272: my $self=shift;
2273: return $self->navHash("src_", 1);
2274: }
2275: sub symb {
2276: my $self=shift;
2277: (my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
2278: my $symbSrc = &Apache::lonnet::declutter($self->src());
2279: return &Apache::lonnet::declutter(
2280: $self->navHash('map_id_'.$first))
2281: . '___' . $second . '___' . $symbSrc;
2282: }
1.70 bowersj2 2283: sub title { my $self=shift; return $self->navHash("title_", 1); }
2284: sub to { my $self=shift; return $self->navHash("to_", 1); }
2285: sub type { my $self=shift; return $self->navHash("type_", 1); }
2286:
2287: =pod
2288:
2289: B<Predicate Testing the Resource>
2290:
2291: These methods are shortcuts to deciding if a given resource has a given property.
2292:
2293: =over 4
2294:
2295: =item * B<is_map>: Returns true if the resource is a map type.
2296:
2297: =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.)
2298:
2299: =item * B<is_page>: Returns true if the resource is a page.
2300:
2301: =item * B<is_problem>: Returns true if the resource is a problem.
2302:
2303: =item * B<is_sequence>: Returns true if the resource sequence.
2304:
2305: =back
2306:
2307: =cut
2308:
2309:
2310: sub is_html {
1.51 bowersj2 2311: my $self=shift;
2312: my $src = $self->src();
1.70 bowersj2 2313: return ($src =~ /html$/);
1.51 bowersj2 2314: }
1.70 bowersj2 2315: sub is_map { my $self=shift; return defined($self->navHash("is_map_", 1)); }
2316: sub is_page {
1.51 bowersj2 2317: my $self=shift;
2318: my $src = $self->src();
1.70 bowersj2 2319: return ($src =~ /page$/);
1.51 bowersj2 2320: }
1.70 bowersj2 2321: sub is_problem {
1.51 bowersj2 2322: my $self=shift;
2323: my $src = $self->src();
1.70 bowersj2 2324: return ($src =~ /problem$/);
1.51 bowersj2 2325: }
1.70 bowersj2 2326: sub is_sequence {
1.51 bowersj2 2327: my $self=shift;
2328: my $src = $self->src();
1.70 bowersj2 2329: return ($src =~ /sequence$/);
1.51 bowersj2 2330: }
2331:
2332:
2333:
2334:
1.70 bowersj2 2335:
1.51 bowersj2 2336: # Move this into POD: In order to use these correctly, courseopt
2337: # and useropt need to be generated
2338: sub parmval {
2339: my $self = shift;
2340: my $what = shift;
2341: my $part = shift || "0";
2342: return $self->{NAV_MAP}->parmval($part.'.'.$what, $self->symb());
2343: }
2344:
1.70 bowersj2 2345: =pod
2346:
2347: B<Map Methods>
2348:
2349: These methods are useful for getting information about the map properties of the resource, if the resource is a map (B<is_map>).
2350:
2351: =over 4
2352:
2353: =item * B<map_finish>: Returns a reference to a resource object corresponding to the finish resource of the map.
2354:
2355: =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.
2356:
2357: =item * B<map_start>: Returns a reference to a resource object corresponding to the start resource of the map.
2358:
2359: =item * B<map_type>: Returns a string with the type of the map in it.
2360:
2361: =back
1.51 bowersj2 2362:
1.70 bowersj2 2363: =cut
1.51 bowersj2 2364:
2365: sub map_finish {
2366: my $self = shift;
2367: my $src = $self->src();
2368: my $res = $self->navHash("map_finish_$src", 0);
2369: $res = $self->{NAV_MAP}->getById($res);
2370: return $res;
2371: }
1.70 bowersj2 2372: sub map_pc {
2373: my $self = shift;
2374: my $src = $self->src();
2375: return $self->navHash("map_pc_$src", 0);
2376: }
1.51 bowersj2 2377: sub map_start {
2378: my $self = shift;
2379: my $src = $self->src();
2380: my $res = $self->navHash("map_start_$src", 0);
2381: $res = $self->{NAV_MAP}->getById($res);
2382: return $res;
2383: }
2384: sub map_type {
2385: my $self = shift;
2386: my $pc = $self->map_pc();
2387: return $self->navHash("map_type_$pc", 0);
2388: }
2389:
2390:
2391:
2392: #####
2393: # Property queries
2394: #####
2395:
2396: # These functions will be responsible for returning the CORRECT
2397: # VALUE for the parameter, no matter what. So while they may look
2398: # like direct calls to parmval, they can be more then that.
2399: # So, for instance, the duedate function should use the "duedatetype"
2400: # information, rather then the resource object user.
2401:
2402: =pod
2403:
2404: =head2 Resource Parameters
2405:
1.70 bowersj2 2406: 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 2407:
2408: 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.)
2409:
2410: =over 4
2411:
2412: =item * B<acc>: Get the Client IP/Name Access Control information.
2413:
2414: =item * B<answerdate>: Get the answer-reveal date for the problem.
2415:
2416: =item * B<duedate>: Get the due date for the problem.
2417:
2418: =item * B<tries>: Get the number of tries the student has used on the problem.
2419:
2420: =item * B<maxtries>: Get the number of max tries allowed.
2421:
2422: =item * B<opendate>: Get the open date for the problem.
2423:
2424: =item * B<sig>: Get the significant figures setting.
2425:
2426: =item * B<tol>: Get the tolerance for the problem.
2427:
1.70 bowersj2 2428: =item * B<tries>: Get the number of tries the user has already used on the problem.
2429:
1.51 bowersj2 2430: =item * B<type>: Get the question type for the problem.
2431:
2432: =item * B<weight>: Get the weight for the problem.
2433:
2434: =back
2435:
2436: =cut
2437:
2438: sub acc {
2439: (my $self, my $part) = @_;
2440: return $self->parmval("acc", $part);
2441: }
2442: sub answerdate {
2443: (my $self, my $part) = @_;
2444: # Handle intervals
2445: if ($self->parmval("answerdate.type", $part) eq 'date_interval') {
2446: return $self->duedate($part) +
2447: $self->parmval("answerdate", $part);
2448: }
2449: return $self->parmval("answerdate", $part);
2450: }
2451: sub duedate {
2452: (my $self, my $part) = @_;
2453: return $self->parmval("duedate", $part);
2454: }
2455: sub maxtries {
2456: (my $self, my $part) = @_;
2457: return $self->parmval("maxtries", $part);
2458: }
2459: sub opendate {
2460: (my $self, my $part) = @_;
2461: if ($self->parmval("opendate.type", $part) eq 'date_interval') {
2462: return $self->duedate($part) -
2463: $self->parmval("opendate", $part);
2464: }
2465: return $self->parmval("opendate");
2466: }
2467: sub sig {
2468: (my $self, my $part) = @_;
2469: return $self->parmval("sig", $part);
2470: }
2471: sub tol {
2472: (my $self, my $part) = @_;
2473: return $self->parmval("tol", $part);
2474: }
2475: sub tries {
2476: my $self = shift;
2477: my $part = shift;
2478: $part = '0' if (!defined($part));
2479:
2480: # Make sure return hash is loaded, should error check
2481: $self->getReturnHash();
2482:
2483: my $tries = $self->{RETURN_HASH}->{'resource.'.$part.'.tries'};
2484: if (!defined($tries)) {return '0';}
2485: return $tries;
2486: }
1.70 bowersj2 2487: sub type {
2488: (my $self, my $part) = @_;
2489: return $self->parmval("type", $part);
2490: }
2491: sub weight {
2492: (my $self, my $part) = @_;
2493: return $self->parmval("weight", $part);
2494: }
1.51 bowersj2 2495:
2496: # Multiple things need this
2497: sub getReturnHash {
2498: my $self = shift;
2499:
2500: if (!defined($self->{RETURN_HASH})) {
2501: my %tmpHash = &Apache::lonnet::restore($self->symb());
2502: $self->{RETURN_HASH} = \%tmpHash;
2503: }
2504: }
2505:
2506: ######
2507: # Status queries
2508: ######
2509:
2510: # These methods query the status of problems.
2511:
2512: # If we need to count parts, this function determines the number of
2513: # parts from the metadata. When called, it returns a reference to a list
2514: # of strings corresponding to the parts. (Thus, using it in a scalar context
2515: # tells you how many parts you have in the problem:
2516: # $partcount = scalar($resource->countParts());
2517: # Don't use $self->{PARTS} directly because you don't know if it's been
2518: # computed yet.
2519:
2520: =pod
2521:
2522: =head2 Resource misc
2523:
2524: Misc. functions for the resource.
2525:
2526: =over 4
2527:
1.59 bowersj2 2528: =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.
2529:
2530: =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:
2531:
2532: for (split(/\,/, $res->getFeedback())) {
2533: my $link = &Apache::lonnet::escape($_);
2534: ...
2535:
2536: and use the link as appropriate.
2537:
2538: =cut
2539:
2540: sub hasDiscussion {
2541: my $self = shift;
2542: return $self->{NAV_MAP}->hasDiscussion($self->symb());
2543: }
2544:
2545: sub getFeedback {
2546: my $self = shift;
2547: return $self->{NAV_MAP}->getFeedback($self->symb());
2548: }
2549:
2550: =pod
2551:
1.70 bowersj2 2552: =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 2553:
1.70 bowersj2 2554: =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 2555:
2556: =back
2557:
2558: =cut
2559:
2560: sub parts {
2561: my $self = shift;
2562:
1.67 bowersj2 2563: if ($self->ext) { return ['0']; }
2564:
1.51 bowersj2 2565: $self->extractParts();
2566: return $self->{PARTS};
2567: }
2568:
2569: sub countParts {
2570: my $self = shift;
2571:
2572: my $parts = $self->parts();
1.66 bowersj2 2573:
2574: if ($self->{RESOURCE_ERROR}) {
2575: return 0;
2576: }
2577:
2578: if (scalar(@{$parts}) < 2) { return 1;}
1.51 bowersj2 2579:
2580: return scalar(@{$parts}) - 1;
2581: }
2582:
2583: # Private function: Extracts the parts information and saves it
2584: sub extractParts {
2585: my $self = shift;
2586:
2587: return if ($self->{PARTS});
1.67 bowersj2 2588: return if ($self->ext);
1.51 bowersj2 2589:
2590: $self->{PARTS} = [];
2591:
1.82 bowersj2 2592: # Retrieve part count, if this is a problem
2593: if ($self->is_problem()) {
2594: my $metadata = &Apache::lonnet::metadata($self->src(), 'allpossiblekeys');
2595: if (!$metadata) {
2596: $self->{RESOURCE_ERROR} = 1;
2597: $self->{PARTS} = [];
2598: return;
2599: }
2600:
2601: foreach (split(/\,/,$metadata)) {
2602: if ($_ =~ /^parameter\_(.*)\_opendate$/) {
2603: push @{$self->{PARTS}}, $1;
2604: }
1.51 bowersj2 2605: }
1.82 bowersj2 2606:
2607:
2608: # Is this possible to do in one line? - Jeremy
2609: my @sortedParts = sort @{$self->{PARTS}};
2610: $self->{PARTS} = \@sortedParts;
1.51 bowersj2 2611: }
2612:
2613: return;
2614: }
2615:
2616: =pod
2617:
2618: =head2 Resource Status
2619:
2620: Problem resources have status information, reflecting their various dates and completion statuses. You can obtain this information and import symbolic constants to represent the status.
2621:
2622: There are two aspects to the status: the date-related information and the completion information.
2623:
2624: Idiomatic usage of these two methods would probably look something like
2625:
2626: foreach ($resource->parts()) {
2627: my $dateStatus = $resource->getDateStatus($_);
2628: my $completionStatus = $resource->getCompletionStatus($_);
2629:
1.70 bowersj2 2630: or
2631:
2632: my $status = $resource->status($_);
2633:
1.51 bowersj2 2634: ... use it here ...
2635: }
2636:
2637: =over 4
2638:
1.70 bowersj2 2639: =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 2640:
2641: =back
2642:
2643: B<Date Codes>
2644:
2645: =over 4
2646:
2647: =item * B<OPEN_LATER>: The problem will be opened later.
2648:
2649: =item * B<OPEN>: Open and not yet due.
2650:
1.59 bowersj2 2651:
1.54 bowersj2 2652: =item * B<PAST_DUE_ANSWER_LATER>: The due date has passed, but the answer date has not yet arrived.
2653:
2654: =item * B<PAST_DUE_NO_ANSWER>: The due date has passed and there is no answer opening date set.
1.51 bowersj2 2655:
2656: =item * B<ANSWER_OPEN>: The answer date is here.
2657:
2658: =item * B<NETWORK_FAILURE>: The information is unknown due to network failure.
2659:
2660: =back
2661:
2662: =cut
2663:
2664: # Apparently the compiler optimizes these into constants automatically
1.54 bowersj2 2665: sub OPEN_LATER { return 0; }
2666: sub OPEN { return 1; }
2667: sub PAST_DUE_NO_ANSWER { return 2; }
2668: sub PAST_DUE_ANSWER_LATER { return 3; }
2669: sub ANSWER_OPEN { return 4; }
2670: sub NOTHING_SET { return 5; }
2671: sub NETWORK_FAILURE { return 100; }
2672:
2673: # getDateStatus gets the date status for a given problem part.
2674: # Because answer date, due date, and open date are fully independent
2675: # (i.e., it is perfectly possible to *only* have an answer date),
2676: # we have to completely cover the 3x3 maxtrix of (answer, due, open) x
2677: # (past, future, none given). This function handles this with a decision
2678: # tree. Read the comments to follow the decision tree.
1.51 bowersj2 2679:
2680: sub getDateStatus {
2681: my $self = shift;
2682: my $part = shift;
2683: $part = "0" if (!defined($part));
1.54 bowersj2 2684:
2685: # Always return network failure if there was one.
1.51 bowersj2 2686: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
2687:
2688: my $now = time();
2689:
1.53 bowersj2 2690: my $open = $self->opendate($part);
2691: my $due = $self->duedate($part);
2692: my $answer = $self->answerdate($part);
2693:
2694: if (!$open && !$due && !$answer) {
2695: # no data on the problem at all
2696: # should this be the same as "open later"? think multipart.
2697: return $self->NOTHING_SET;
2698: }
1.59 bowersj2 2699: if (!$open || $now < $open) {return $self->OPEN_LATER}
2700: if (!$due || $now < $due) {return $self->OPEN}
2701: if ($answer && $now < $answer) {return $self->PAST_DUE_ANSWER_LATER}
2702: if ($answer) { return $self->ANSWER_OPEN; }
1.54 bowersj2 2703: return PAST_DUE_NO_ANSWER;
1.51 bowersj2 2704: }
2705:
2706: =pod
2707:
2708: B<>
2709:
2710: =over 4
2711:
2712: =item * B<getCompletionStatus>($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:
2713:
2714: =back
2715:
2716: B<Completion Codes>
2717:
2718: =over 4
2719:
2720: =item * B<NOT_ATTEMPTED>: Has not been attempted at all.
2721:
2722: =item * B<INCORRECT>: Attempted, but wrong by student.
2723:
2724: =item * B<INCORRECT_BY_OVERRIDE>: Attempted, but wrong by instructor override.
2725:
2726: =item * B<CORRECT>: Correct or correct by instructor.
2727:
2728: =item * B<CORRECT_BY_OVERRIDE>: Correct by instructor override.
2729:
2730: =item * B<EXCUSED>: Excused. Not yet implemented.
2731:
2732: =item * B<NETWORK_FAILURE>: Information not available due to network failure.
2733:
1.69 bowersj2 2734: =item * B<ATTEMPTED>: Attempted, and not yet graded.
2735:
1.51 bowersj2 2736: =back
2737:
2738: =cut
2739:
1.53 bowersj2 2740: sub NOT_ATTEMPTED { return 10; }
2741: sub INCORRECT { return 11; }
2742: sub INCORRECT_BY_OVERRIDE { return 12; }
2743: sub CORRECT { return 13; }
2744: sub CORRECT_BY_OVERRIDE { return 14; }
2745: sub EXCUSED { return 15; }
1.69 bowersj2 2746: sub ATTEMPTED { return 16; }
1.51 bowersj2 2747:
2748: sub getCompletionStatus {
2749: my $self = shift;
2750: my $part = shift;
2751: $part = "0" if (!defined($part));
2752: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
2753:
2754: # Make sure return hash exists
2755: $self->getReturnHash();
2756:
2757: my $status = $self->{RETURN_HASH}->{'resource.'.$part.'.solved'};
2758:
2759: # Left as seperate if statements in case we ever do more with this
2760: if ($status eq 'correct_by_student') {return $self->CORRECT;}
2761: if ($status eq 'correct_by_override') {return $self->CORRECT_BY_OVERRIDE; }
2762: if ($status eq 'incorrect_attempted') {return $self->INCORRECT; }
2763: if ($status eq 'incorrect_by_override') {return $self->INCORRECT_BY_OVERRIDE; }
2764: if ($status eq 'excused') {return $self->EXCUSED; }
1.69 bowersj2 2765: if ($status eq 'ungraded_attempted') {return $self->ATTEMPTED; }
1.51 bowersj2 2766: return $self->NOT_ATTEMPTED;
2767: }
2768:
2769: =pod
2770:
2771: B<Composite Status>
2772:
2773: Along with directly returning the date or completion status, the resource object includes a convenience function B<status>() that will combine the two status tidbits into one composite status that can represent the status of the resource as a whole. The precise logic is documented in the comments of the status method. The following results may be returned, all available as methods on the resource object ($res->NETWORK_FAILURE()):
2774:
2775: =over 4
2776:
1.70 bowersj2 2777: =item * B<NETWORK_FAILURE>: The network has failed and the information is not available.
1.51 bowersj2 2778:
1.70 bowersj2 2779: =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 2780:
1.70 bowersj2 2781: =item * B<CORRECT>: For any reason at all, the part is considered correct.
1.51 bowersj2 2782:
1.70 bowersj2 2783: =item * B<EXCUSED>: For any reason at all, the problem is excused.
1.51 bowersj2 2784:
1.70 bowersj2 2785: =item * B<PAST_DUE_NO_ANSWER>: The problem is past due, not considered correct, and no answer date is set.
1.54 bowersj2 2786:
1.70 bowersj2 2787: =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 2788:
1.70 bowersj2 2789: =item * B<ANSWER_OPEN>: The problem is past due, not correct, and the answer is now available.
1.51 bowersj2 2790:
1.70 bowersj2 2791: =item * B<OPEN_LATER>: The problem is not yet open.
1.51 bowersj2 2792:
1.70 bowersj2 2793: =item * B<TRIES_LEFT>: The problem is open, has been tried, is not correct, but there are tries left.
1.51 bowersj2 2794:
1.70 bowersj2 2795: =item * B<INCORRECT>: The problem is open, and all tries have been used without getting the correct answer.
1.51 bowersj2 2796:
1.70 bowersj2 2797: =item * B<OPEN>: The item is open and not yet tried.
1.51 bowersj2 2798:
1.70 bowersj2 2799: =item * B<ATTEMPTED>: The problem has been attempted.
1.69 bowersj2 2800:
1.51 bowersj2 2801: =back
2802:
2803: =cut
2804:
2805: sub TRIES_LEFT { return 10; }
2806:
2807: sub status {
2808: my $self = shift;
2809: my $part = shift;
2810: if (!defined($part)) { $part = "0"; }
2811: my $completionStatus = $self->getCompletionStatus($part);
2812: my $dateStatus = $self->getDateStatus($part);
2813:
2814: # What we have is a two-dimensional matrix with 4 entries on one
2815: # dimension and 5 entries on the other, which we want to colorize,
1.54 bowersj2 2816: # plus network failure and "no date data at all".
1.51 bowersj2 2817:
1.53 bowersj2 2818: if ($completionStatus == NETWORK_FAILURE) { return NETWORK_FAILURE; }
1.51 bowersj2 2819:
2820: # There are a few whole rows we can dispose of:
1.53 bowersj2 2821: if ($completionStatus == CORRECT ||
2822: $completionStatus == CORRECT_BY_OVERRIDE ) {
1.69 bowersj2 2823: return CORRECT;
2824: }
2825:
2826: if ($completionStatus == ATTEMPTED) {
2827: return ATTEMPTED;
1.53 bowersj2 2828: }
2829:
2830: # If it's EXCUSED, then return that no matter what
2831: if ($completionStatus == EXCUSED) {
2832: return EXCUSED;
1.51 bowersj2 2833: }
2834:
1.53 bowersj2 2835: if ($dateStatus == NOTHING_SET) {
2836: return NOTHING_SET;
1.51 bowersj2 2837: }
2838:
1.69 bowersj2 2839: # Now we're down to a 4 (incorrect, incorrect_override, not_attempted)
2840: # by 4 matrix (date statuses).
1.51 bowersj2 2841:
1.54 bowersj2 2842: if ($dateStatus == PAST_DUE_ANSWER_LATER ||
1.59 bowersj2 2843: $dateStatus == PAST_DUE_NO_ANSWER ) {
1.54 bowersj2 2844: return $dateStatus;
1.51 bowersj2 2845: }
2846:
1.53 bowersj2 2847: if ($dateStatus == ANSWER_OPEN) {
2848: return ANSWER_OPEN;
1.51 bowersj2 2849: }
2850:
2851: # Now: (incorrect, incorrect_override, not_attempted) x
2852: # (open_later), (open)
2853:
1.53 bowersj2 2854: if ($dateStatus == OPEN_LATER) {
2855: return OPEN_LATER;
1.51 bowersj2 2856: }
2857:
2858: # If it's WRONG...
1.53 bowersj2 2859: if ($completionStatus == INCORRECT || $completionStatus == INCORRECT_BY_OVERRIDE) {
1.51 bowersj2 2860: # and there are TRIES LEFT:
1.79 bowersj2 2861: if ($self->tries($part) < $self->maxtries($part) || !$self->maxtries($part)) {
1.53 bowersj2 2862: return TRIES_LEFT;
1.51 bowersj2 2863: }
1.53 bowersj2 2864: return INCORRECT; # otherwise, return orange; student can't fix this
1.51 bowersj2 2865: }
2866:
2867: # Otherwise, it's untried and open
1.53 bowersj2 2868: return OPEN;
1.51 bowersj2 2869: }
2870:
2871: =pod
2872:
2873: =head2 Resource/Nav Map Navigation
2874:
2875: =over 4
2876:
2877: =item * B<getNext>(): Gets the next resource in the navmap after this one.
2878:
2879: =cut
2880:
2881: # For the simple single-link case, to get from a resource to the next
2882: # resource, you need to look up the "to_" link in the nav hash, then
2883: # follow that with the "goesto_" link.
2884:
2885: sub getNext {
2886: my $self = shift;
2887: my $alreadySeenHash = shift;
2888: my @branches;
2889: my $to = $self->to();
2890: foreach my $branch ( split(/\,/, $to) ) {
2891: my $choice = $self->{NAV_MAP}->getById($branch);
2892: my $next = $choice->goesto();
2893: $next = $self->{NAV_MAP}->getById($next);
2894:
1.61 bowersj2 2895: # Don't remember it if we've already seen it or if
1.66 bowersj2 2896: # the student doesn't have browse priviledges
2897: my $browsePriv = &Apache::lonnet::allowed('bre', $self->src);
1.51 bowersj2 2898: if (!defined($alreadySeenHash) ||
1.61 bowersj2 2899: !defined($alreadySeenHash->{$next->{ID}}) ||
1.66 bowersj2 2900: ($browsePriv ne '2' && $browsePriv ne 'F')) {
1.51 bowersj2 2901: push @branches, $next;
2902: }
2903: }
2904: return \@branches;
2905: }
2906:
2907: =pod
1.2 www 2908:
1.51 bowersj2 2909: =back
1.2 www 2910:
1.51 bowersj2 2911: =cut
1.2 www 2912:
1.51 bowersj2 2913: 1;
1.2 www 2914:
1.51 bowersj2 2915: __END__
1.2 www 2916:
2917:
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