Annotation of loncom/interface/lonnavmaps.pm, revision 1.91
1.72 bowersj2 1:
1.2 www 2: # The LearningOnline Network with CAPA
3: # Navigate Maps Handler
1.1 www 4: #
1.88 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: $r->print('<img src="/adm/lonMisc/chat.gif"> Discussions'.
850: '<br><img src="/adm/lonMisc/feedback.gif"> New message (click to open)<p>');
1.65 bowersj2 851: }
1.55 bowersj2 852:
853: # Check that it's defined
854: if (!($navmap->courseMapDefined())) {
855: $r->print('<font size="+2" color="red">Coursemap undefined.</font>' .
856: '</body></html>');
857: return OK;
858: }
859:
1.51 bowersj2 860: # Grab a resource object so we have access to the constants; this
861: # is technically not proper, but should be harmless
862: my $res = $navmap->firstResource();
863:
864: # Defines a status->color mapping, null string means don't color
865: my %colormap =
1.54 bowersj2 866: ( $res->NETWORK_FAILURE => '',
1.59 bowersj2 867: $res->CORRECT => '',
1.54 bowersj2 868: $res->EXCUSED => '#BBBBFF',
1.59 bowersj2 869: $res->PAST_DUE_ANSWER_LATER => '',
870: $res->PAST_DUE_NO_ANSWER => '',
871: $res->ANSWER_OPEN => '#CCFFCC',
1.54 bowersj2 872: $res->OPEN_LATER => '',
1.59 bowersj2 873: $res->TRIES_LEFT => '',
874: $res->INCORRECT => '',
875: $res->OPEN => '',
1.54 bowersj2 876: $res->NOTHING_SET => '' );
1.59 bowersj2 877: # And a special case in the nav map; what to do when the assignment
878: # is not yet done and due in less then 24 hours
1.86 bowersj2 879: my $hurryUpColor = "#FF0000";
1.59 bowersj2 880:
881: my %statusIconMap =
1.66 bowersj2 882: ( $res->NETWORK_FAILURE => '',
883: $res->NOTHING_SET => '',
884: $res->CORRECT => 'navmap.correct.gif',
885: $res->EXCUSED => 'navmap.correct.gif',
886: $res->PAST_DUE_NO_ANSWER => 'navmap.wrong.gif',
887: $res->PAST_DUE_ANSWER_LATER => 'navmap.wrong.gif',
888: $res->ANSWER_OPEN => 'navmap.wrong.gif',
889: $res->OPEN_LATER => '',
890: $res->TRIES_LEFT => 'navmap.open.gif',
891: $res->INCORRECT => 'navmap.wrong.gif',
1.69 bowersj2 892: $res->OPEN => 'navmap.open.gif',
1.85 bowersj2 893: $res->ATTEMPTED => 'navmap.open.gif' );
1.69 bowersj2 894:
895: my %iconAltTags =
896: ( 'navmap.correct.gif' => 'Correct',
897: 'navmap.wrong.gif' => 'Incorrect',
898: 'navmap.open.gif' => 'Open' );
1.59 bowersj2 899:
900: my %condenseStatuses =
1.66 bowersj2 901: ( $res->NETWORK_FAILURE => 1,
902: $res->NOTHING_SET => 1,
903: $res->CORRECT => 1 );
1.51 bowersj2 904:
905: my %filterHash;
906: # Figure out what we're not displaying
907: foreach (split(/\,/, $ENV{"form.filter"})) {
908: if ($_) {
909: $filterHash{$_} = "1";
910: }
911: }
912:
1.88 bowersj2 913: # Is this a new-style course? If so, we want to suppress showing the top-level
914: # maps in their own folders, in favor of "inlining" them.
915: my $topResource = $navmap->getById("0.0");
916: my $inlineTopLevelMaps = $topResource->src() =~ m|^/uploaded/.*default\.sequence$|;
917:
1.63 bowersj2 918: my $currenturl = $ENV{'form.postdata'};
919: $currenturl=~s/^http\:\/\///;
920: $currenturl=~s/^[^\/]+//;
1.75 bowersj2 921: # alreadyHere allows us to only open the maps necessary to view
922: # the current location once, while at the same time remembering
923: # the current location. Without that check, the user would never
924: # be able to close those maps; the user would close it, and the
925: # currenturl scan would re-open it.
926: my $queryAdd = "postdata=" . &Apache::lonnet::escape($currenturl) .
927: "&alreadyHere=1";
1.63 bowersj2 928:
1.91 ! bowersj2 929: my $condition = 0;
! 930: if ($ENV{'form.condition'}) {
! 931: $condition = 1;
! 932: }
! 933:
! 934: if ($condition) {
! 935: $r->print('<a href="navmaps?condition=0&filter=">Close All Folders</a><br /><br />');
! 936: } else {
! 937: $r->print('<a href="navmaps?condition=1&filter=">Open All Folders</a><br /><br />');
! 938: }
1.63 bowersj2 939:
1.51 bowersj2 940: # Begin the HTML table
1.59 bowersj2 941: # four cols: resource + indent, chat+feedback, icon, text string
1.85 bowersj2 942: $r->print('<table cellspacing="0" cellpadding="3" border="0" bgcolor="#FFFFFF">' ."\n");
1.51 bowersj2 943:
1.74 bowersj2 944: # This needs to be updated to use symbs from the remote,
945: # instead of uris. The changes to this and the main rendering
946: # loop should be obvious.
947: # Here's a simple example of the iterator.
1.88 bowersj2 948: # Preprocess the map: Look for current URL, force inlined maps to display
949:
950: my $mapIterator = $navmap->getIterator(undef, undef, {}, 1);
951: my $found = 0;
952: my $depth = 1;
1.91 ! bowersj2 953: my $currentUrlIndex = 0; # keeps track of when the current resource is found,
! 954: # so we can back up a few and put the anchor above the
! 955: # current resource
1.88 bowersj2 956: $mapIterator->next(); # discard the first BEGIN_MAP
957: my $curRes = $mapIterator->next();
1.91 ! bowersj2 958: my $counter = 0;
1.88 bowersj2 959:
960: while ($depth > 0) {
961: if ($curRes == $mapIterator->BEGIN_MAP()) {
962: $depth++;
963: }
964: if ($curRes == $mapIterator->END_MAP()) {
965: $depth--;
966: }
967:
1.91 ! bowersj2 968: if (ref($curRes)) { $counter++; }
! 969:
1.88 bowersj2 970: my $mapStack = $mapIterator->getStack();
971: if ($currenturl && !$ENV{'form.alreadyHere'} && ref($curRes) &&
972: $curRes->src() eq $currenturl) {
973: # If this is the correct resource, be sure to
974: # show it by making sure the containing maps
975: # are open.
1.91 ! bowersj2 976:
! 977: $currentUrlIndex = $counter;
1.88 bowersj2 978:
979: for my $map (@{$mapStack}) {
980: if ($condition) {
981: undef $filterHash{$map->map_pc()};
982: } else {
983: $filterHash{$map->map_pc()} = 1;
1.74 bowersj2 984: }
985: }
1.88 bowersj2 986: $ENV{'form.alreadyHere'} = 1;
987: }
988:
989: # Preprocessing: If we're inlining nav maps into the top-level display,
990: # make sure we show this map!
991: if ($inlineTopLevelMaps && ref($curRes) && $curRes->is_map &&
992: scalar(@{$mapStack}) == 1) {
993: if ($condition) {
994: undef $filterHash{$curRes->map_pc()};
995: } else {
996: $filterHash{$curRes->map_pc()} = 1;
997: }
1.74 bowersj2 998: }
1.88 bowersj2 999:
1000: $curRes = $mapIterator->next();
1.74 bowersj2 1001: }
1.88 bowersj2 1002:
1.53 bowersj2 1003: undef $res; # so we don't accidentally use it later
1.72 bowersj2 1004: my $indentLevel = 0;
1.61 bowersj2 1005: my $indentString = "<img src=\"/adm/lonIcons/whitespace1.gif\" width=\"25\" height=\"1\" alt=\"\" border=\"0\" />";
1.51 bowersj2 1006:
1007: my $isNewBranch = 0;
1.59 bowersj2 1008: my $now = time();
1009: my $in24Hours = $now + 24 * 60 * 60;
1.78 bowersj2 1010: my $displayedHereMarker = 0;
1.88 bowersj2 1011:
1.72 bowersj2 1012: # We know the first thing is a BEGIN_MAP (see "$self->{STARTED}"
1013: # code in iterator->next), so ignore the first one
1.89 bowersj2 1014: $mapIterator = $navmap->getIterator(undef, undef, \%filterHash,
1.74 bowersj2 1015: $condition);
1.72 bowersj2 1016: $mapIterator->next();
1.89 bowersj2 1017: $curRes = $mapIterator->next();
1.88 bowersj2 1018: my $deltadepth = 0;
1.90 bowersj2 1019: $depth = 1;
1.88 bowersj2 1020:
1021: my @backgroundColors = ("#FFFFFF", "#F6F6F6");
1022: my $rowNum = 0;
1.51 bowersj2 1023:
1.91 ! bowersj2 1024: $counter = 0;
! 1025:
1.72 bowersj2 1026: while ($depth > 0) {
1.88 bowersj2 1027: # If we're in a new style course, and this is a BEGIN_MAP, END_MAP, or
1028: # map resource and the stack depth is only one, just plain ignore this resource
1029: # entirely. (This has the effect of inlining the resources in that map
1030: # in the nav map.)
1031: if ($inlineTopLevelMaps && scalar(@{$mapIterator->getStack()}) == 1 &&
1032: ref($curRes) && $curRes->is_map()) {
1033: # We let the normal depth stuff occur, but we need to shift everything
1034: # over by one to the left to make it look right.
1035: $deltadepth = -1;
1036: $curRes = $mapIterator->next();
1037: next;
1038: }
1039:
1.51 bowersj2 1040: if ($curRes == $mapIterator->BEGIN_MAP() ||
1.52 bowersj2 1041: $curRes == $mapIterator->BEGIN_BRANCH()) {
1.51 bowersj2 1042: $indentLevel++;
1043: }
1044: if ($curRes == $mapIterator->END_MAP() ||
1.52 bowersj2 1045: $curRes == $mapIterator->END_BRANCH()) {
1.51 bowersj2 1046: $indentLevel--;
1047: }
1.52 bowersj2 1048: if ($curRes == $mapIterator->BEGIN_BRANCH()) {
1049: $isNewBranch = 1;
1.72 bowersj2 1050: }
1051: if ($curRes == $mapIterator->BEGIN_MAP()) {
1052: $depth++;
1053: }
1054: if ($curRes == $mapIterator->END_MAP()) {
1055: $depth--;
1.51 bowersj2 1056: }
1057:
1.91 ! bowersj2 1058: if (ref($curRes)) { $counter++; }
! 1059:
1.88 bowersj2 1060: if ($depth == 1) { $deltadepth = 0; } # we're done shifting, because we're
1061: # out of the inlined map
1062:
1.68 bowersj2 1063: # Is this resource being blotted out?
1064: if (ref($curRes) && !advancedUser() && $curRes->randomout()) {
1065: $curRes = $mapIterator->next();
1066: next; # and totally ignore this resource
1067: }
1068:
1.51 bowersj2 1069: if (ref($curRes) && $curRes->src()) {
1070:
1.66 bowersj2 1071: # Step one: Decide which parts to show
1072: my @parts = @{$curRes->parts()};
1073: my $multipart = scalar(@parts) > 1;
1074: my $condensed = 0;
1075:
1.51 bowersj2 1076: if ($curRes->is_problem()) {
1.66 bowersj2 1077: # Is it multipart?
1.59 bowersj2 1078:
1.66 bowersj2 1079: if ($multipart) {
1080: # If it's multipart, see if part 0 is "open"
1081: # if it is, display all parts, if it isn't,
1082: # just display first
1083: if (!$curRes->opendate("0")) {
1084: @parts = ("0"); # just display the zero-th part
1.68 bowersj2 1085: $condensed = 1;
1.66 bowersj2 1086: } else {
1087: # Otherwise, only display part 0 if we want to
1088: # attach feedback or email information to it
1089: if ($curRes->hasDiscussion() || $curRes->getFeedback()) {
1090: shift @parts;
1091: } else {
1092: # If there's discussion or feedback, that counts
1093: # as a difference, so display the parts.
1094:
1095: # Now, we decide whether to condense the
1096: # parts due to similarity
1097: my $status = $curRes->status($parts[1]);
1098: my $due = $curRes->duedate($parts[1]);
1099: my $open = $curRes->opendate($parts[1]);
1100: my $statusAllSame = 1;
1101: my $dueAllSame = 1;
1102: my $openAllSame = 1;
1103: for (my $i = 2; $i < scalar(@parts); $i++) {
1104: if ($curRes->status($parts[$i]) != $status){
1105: $statusAllSame = 0;
1106: }
1107: if ($curRes->duedate($parts[$i]) != $due ) {
1108: $dueAllSame = 0;
1109: }
1110: if ($curRes->opendate($parts[$i]) != $open) {
1111: $openAllSame = 0;
1112: }
1113: }
1114:
1115: # $allSame is true if all the statuses were
1116: # the same. Now, if they are all the same and
1117: # match one of the statuses to condense, or they
1118: # are all open with the same due date, or they are
1119: # all OPEN_LATER with the same open date, display the
1120: # status of the first non-zero part (to get the 'correct'
1121: # status right, since 0 is never 'correct' or 'open').
1122: if (($statusAllSame && defined($condenseStatuses{$status})) ||
1123: ($dueAllSame && $status == $curRes->OPEN && $statusAllSame)||
1124: ($openAllSame && $status == $curRes->OPEN_LATER && $statusAllSame) ){
1125: @parts = ($parts[1]);
1126: $condensed = 1;
1127: }
1128: }
1129: }
1130: }
1.59 bowersj2 1131:
1.51 bowersj2 1132: } else {
1.84 bowersj2 1133: $parts[0] = "0"; # this is to get past foreach loop below
1.51 bowersj2 1134: # you can consider a non-problem resource as a resource
1.77 bowersj2 1135: # with only one part without loss
1.51 bowersj2 1136: }
1137:
1.83 bowersj2 1138: # Is it a multipart problem with a single part, now in
1139: # @parts with "0" filtered out? If so, forget it's a multi-part
1140: # problem and treat it like a single-part problem.
1141: if ( scalar(@parts) == 1 ) {
1142: $multipart = 0;
1143: }
1144:
1.66 bowersj2 1145: # Display one part, in event of network error.
1146: # If this is a single part, we can at least show the correct
1147: # status, but if it's multipart, we're lost.
1148: if ($curRes->{RESOURCE_ERROR}) {
1149: @parts = ("0");
1150: }
1151:
1152: # Step two: Show the parts
1.51 bowersj2 1153: foreach my $part (@parts) {
1.59 bowersj2 1154:
1.66 bowersj2 1155: my $deltalevel = 0; # for inserting the branch icon
1.68 bowersj2 1156: my $nonLinkedText = ""; # unlinked stuff after title
1.51 bowersj2 1157:
1158: # For each thing we're displaying...
1159:
1160: my $stack = $mapIterator->getStack();
1161: my $src = getLinkForResource($stack);
1162:
1163: my $srcHasQuestion = $src =~ /\?/;
1164: my $link = $src.
1165: ($srcHasQuestion?'&':'?') .
1166: 'symb='.&Apache::lonnet::escape($curRes->symb()).
1167: '"';
1168: my $title = $curRes->title();
1.81 bowersj2 1169: if (!$title) {
1170: $title = $curRes->src();
1171: $title = substr ($title, rindex($title, "/") + 1);
1172: }
1.51 bowersj2 1173: my $partLabel = "";
1.52 bowersj2 1174: my $newBranchText = "";
1175:
1176: # If this is a new branch, label it so
1177: # (temporary, this should be an icon w/ alt text)
1178: if ($isNewBranch) {
1.59 bowersj2 1179: $newBranchText = "<img src=\"/adm/lonIcons/branch.gif\" border=\"0\">";
1.52 bowersj2 1180: $isNewBranch = 0;
1.66 bowersj2 1181: $deltalevel = 1;
1.52 bowersj2 1182: }
1.51 bowersj2 1183:
1184: # links to open and close the folders
1185: my $linkopen = "<a href=\"$link\">";
1186: my $linkclose = "</a>";
1187:
1.61 bowersj2 1188: my $icon = "<img src=\"/adm/lonIcons/html.gif\" alt=\"\" border=\"0\" />";
1.51 bowersj2 1189: if ($curRes->is_problem()) {
1.66 bowersj2 1190: if ($part eq "0" || $condensed) {
1191: $icon = '<img src="/adm/lonIcons/problem.gif" alt="" border=\"0\" />';
1192: } else {
1193: $icon = $indentString;
1194: }
1.51 bowersj2 1195: }
1196:
1197: # Display the correct icon, link to open or shut map
1198: if ($curRes->is_map()) {
1199: my $mapId = $curRes->map_pc();
1.82 bowersj2 1200: my $nowOpen = (!defined($filterHash{$mapId}));
1201: if ($condition) {$nowOpen = !$nowOpen;}
1.51 bowersj2 1202: $icon = $nowOpen ?
1.77 bowersj2 1203: "navmap.folder.closed.gif" : "navmap.folder.open.gif";
1.66 bowersj2 1204: $icon = "<img src=\"/adm/lonIcons/$icon\" alt=\"\" border=\"0\" />";
1.52 bowersj2 1205: $linkopen = "<a href=\"/adm/navmaps?filter=";
1.66 bowersj2 1206: $linkopen .= ($nowOpen xor $condition) ?
1.51 bowersj2 1207: addToFilter(\%filterHash, $mapId) :
1208: removeFromFilter(\%filterHash, $mapId);
1.66 bowersj2 1209: $linkopen .= "&condition=$condition&$queryAdd\">";
1.51 bowersj2 1210: $linkclose = "</a>";
1.68 bowersj2 1211:
1.51 bowersj2 1212: }
1213:
1214: my $colorizer = "";
1.86 bowersj2 1215: my $color;
1.51 bowersj2 1216: if ($curRes->is_problem()) {
1217: my $status = $curRes->status($part);
1.86 bowersj2 1218: $color = $colormap{$status};
1.74 bowersj2 1219:
1220: # Special case in the navmaps: If in less then
1221: # 24 hours, give it a bit of urgency
1.86 bowersj2 1222: if (($status == $curRes->OPEN() || $status == $curRes->ATTEMPTED() ||
1223: $status == $curRes->TRIES_LEFT())
1224: && $curRes->duedate() &&
1.76 bowersj2 1225: $curRes->duedate() < time()+(24*60*60) &&
1226: $curRes->duedate() > time()) {
1.74 bowersj2 1227: $color = $hurryUpColor;
1228: }
1.79 bowersj2 1229: # Special case: If this is the last try, and there is
1.88 bowersj2 1230: # more then one available, and it's not due yet, give a bit of urgency
1.79 bowersj2 1231: my $tries = $curRes->tries($part);
1232: my $maxtries = $curRes->maxtries($part);
1233: if ($tries && $maxtries && $maxtries > 1 &&
1.88 bowersj2 1234: $maxtries - $tries == 1 && $curRes->duedate() &&
1235: $curRes->duedate() > time()) {
1.79 bowersj2 1236: $color = $hurryUpColor;
1237: }
1.51 bowersj2 1238: if ($color ne "") {
1239: $colorizer = "bgcolor=\"$color\"";
1240: }
1241: }
1242:
1.68 bowersj2 1243: if ($curRes->randomout()) {
1244: $nonLinkedText .= ' <i>(hidden)</i> ';
1245: }
1246:
1.88 bowersj2 1247: $rowNum++;
1248: my $backgroundColor = $backgroundColors[$rowNum % scalar(@backgroundColors)];
1249:
1.91 ! bowersj2 1250: # FIRST COL: The resource indentation, branch icon, name, and anchor
1.88 bowersj2 1251: $r->print(" <tr bgcolor=\"$backgroundColor\"><td align=\"left\" valign=\"center\" width=\"60%\">\n");
1.51 bowersj2 1252:
1.91 ! bowersj2 1253: # anchor for current resource... - 5 is deliberate: If it's that
! 1254: # high on the screen, don't bother focusing on it. Also this will
! 1255: # print multiple anchors if this is an expanded multi-part problem...
! 1256: # who cares?
! 1257: if ($counter == $currentUrlIndex - 5) {
! 1258: $r->print('<a name="current" />');
! 1259: }
! 1260:
1.51 bowersj2 1261: # print indentation
1.88 bowersj2 1262: for (my $i = 0; $i < $indentLevel - $deltalevel + $deltadepth; $i++) {
1.51 bowersj2 1263: $r->print($indentString);
1264: }
1265:
1.61 bowersj2 1266: $r->print(" ${newBranchText}${linkopen}$icon${linkclose}\n");
1.51 bowersj2 1267:
1.74 bowersj2 1268: my $curMarkerBegin = "";
1269: my $curMarkerEnd = "";
1270:
1271: # Is this the current resource?
1.78 bowersj2 1272: if ($curRes->src() eq $currenturl && !$displayedHereMarker) {
1.74 bowersj2 1273: $curMarkerBegin = '<a name="curloc" /><font color="red" size="+2">> </font>';
1274: $curMarkerEnd = '<font color="red" size="+2"> <</font>';
1.78 bowersj2 1275: $displayedHereMarker = 1;
1.74 bowersj2 1276: }
1277:
1.69 bowersj2 1278: if ($curRes->is_problem() && $part ne "0" && !$condensed) {
1.66 bowersj2 1279: $partLabel = " (Part $part)";
1280: $title = "";
1281: }
1.83 bowersj2 1282: if ($multipart && $condensed) {
1.68 bowersj2 1283: $nonLinkedText .= ' (' . $curRes->countParts() . ' parts)';
1.66 bowersj2 1284: }
1.59 bowersj2 1285:
1.74 bowersj2 1286: $r->print(" $curMarkerBegin<a href=\"$link\">$title$partLabel</a> $curMarkerEnd $nonLinkedText");
1.66 bowersj2 1287:
1288: if ($curRes->{RESOURCE_ERROR}) {
1289: $r->print(&Apache::loncommon::help_open_topic ("Navmap_Host_Down",
1.84 bowersj2 1290: '<font size="-1">Host down</font>'));
1.66 bowersj2 1291: }
1292:
1293: my $discussionHTML = ""; my $feedbackHTML = "";
1294:
1.85 bowersj2 1295: # SECOND COL: Is there text, feedback, errors??
1.66 bowersj2 1296: if ($curRes->hasDiscussion()) {
1297: $discussionHTML = $linkopen .
1298: '<img border="0" src="/adm/lonMisc/chat.gif" />' .
1299: $linkclose;
1300: }
1301:
1302: if ($curRes->getFeedback()) {
1303: my $feedback = $curRes->getFeedback();
1304: foreach (split(/\,/, $feedback)) {
1305: if ($_) {
1306: $feedbackHTML .= ' <a href="/adm/email?display='
1307: . &Apache::lonnet::escape($_) . '">'
1308: . '<img src="/adm/lonMisc/feedback.gif" '
1309: . 'border="0" /></a>';
1310: }
1311: }
1312: }
1313:
1.84 bowersj2 1314: $r->print("<td width=\"75\" align=\"left\" valign=\"center\">$discussionHTML$feedbackHTML </td>");
1.66 bowersj2 1315:
1316: # Is this the first displayed part of a multi-part problem
1317: # that has not been condensed, so we should suppress these two
1318: # columns?
1319: my $firstDisplayed = !$condensed && $multipart && $part eq "0";
1320:
1.69 bowersj2 1321: # THIRD COL: Problem status icon
1.66 bowersj2 1322: if ($curRes->is_problem() &&
1323: !$firstDisplayed) {
1324: my $icon = $statusIconMap{$curRes->status($part)};
1.69 bowersj2 1325: my $alt = $iconAltTags{$icon};
1.66 bowersj2 1326: if ($icon) {
1.84 bowersj2 1327: $r->print("<td width=\"30\" valign=\"center\" width=\"50\" align=\"right\">$linkopen<img width=\"25\" height=\"25\" src=\"/adm/lonIcons/$icon\" border=\"0\" alt=\"$alt\" />$linkclose</td>\n");
1.66 bowersj2 1328: } else {
1.84 bowersj2 1329: $r->print("<td width=\"30\"> </td>\n");
1.66 bowersj2 1330: }
1331: } else { # not problem, no icon
1.84 bowersj2 1332: $r->print("<td width=\"30\"> </td>\n");
1.66 bowersj2 1333: }
1334:
1.69 bowersj2 1335: # FOURTH COL: Text description
1.86 bowersj2 1336: #$r->print("<td $colorizer align=\"right\" valign=\"center\">\n");
1337: $r->print("<td align=\"right\" valign=\"center\">\n");
1.51 bowersj2 1338:
1.61 bowersj2 1339: if ($curRes->kind() eq "res" &&
1340: $curRes->is_problem() &&
1.66 bowersj2 1341: !$firstDisplayed) {
1.86 bowersj2 1342: $r->print ("<font color=\"$color\"><b>") if ($color);
1.53 bowersj2 1343: $r->print (getDescription($curRes, $part));
1.86 bowersj2 1344: $r->print ("</b></font>") if ($color);
1.51 bowersj2 1345: }
1.68 bowersj2 1346: if ($curRes->is_map() && advancedUser() && $curRes->randompick()) {
1347: $r->print('(randomly select ' . $curRes->randompick() .')');
1348: }
1.59 bowersj2 1349:
1.84 bowersj2 1350: $r->print(" </td></tr>\n");
1.51 bowersj2 1351: }
1352: }
1353: $curRes = $mapIterator->next();
1354: }
1355:
1356: $r->print("</table></body></html>");
1357:
1.59 bowersj2 1358: $navmap->untieHashes();
1359:
1.51 bowersj2 1360: return OK;
1361: }
1362:
1363: # Convenience functions: Returns a string that adds or subtracts
1364: # the second argument from the first hash, appropriate for the
1365: # query string that determines which folders to recurse on
1366: sub addToFilter {
1367: my $hashIn = shift;
1368: my $addition = shift;
1369: my %hash = %$hashIn;
1370: $hash{$addition} = 1;
1371:
1372: return join (",", keys(%hash));
1373: }
1374:
1375: sub removeFromFilter {
1376: my $hashIn = shift;
1377: my $subtraction = shift;
1378: my %hash = %$hashIn;
1379:
1380: delete $hash{$subtraction};
1381: return join(",", keys(%hash));
1382: }
1383:
1384: # Convenience function: Given a stack returned from getStack on the iterator,
1385: # return the correct src() value.
1386: # Later, this should add an anchor when we start putting anchors in pages.
1387: sub getLinkForResource {
1388: my $stack = shift;
1389: my $res;
1390:
1391: # Check to see if there are any pages in the stack
1392: foreach $res (@$stack) {
1393: if (defined($res) && $res->is_page()) {
1394: return $res->src();
1395: }
1396: }
1397:
1398: # Failing that, return the src of the last resource that is defined
1399: # (when we first recurse on a map, it puts an undefined resource
1400: # on the bottom because $self->{HERE} isn't defined yet, and we
1401: # want the src for the map anyhow)
1402: foreach (@$stack) {
1403: if (defined($_)) { $res = $_; }
1404: }
1405:
1406: return $res->src();
1407: }
1408:
1.53 bowersj2 1409: # Convenience function: This seperates the logic of how to create
1410: # the problem text strings ("Due: DATE", "Open: DATE", "Not yet assigned",
1411: # etc.) into a seperate function. It takes a resource object as the
1412: # first parameter, and the part number of the resource as the second.
1413: # It's basically a big switch statement on the status of the resource.
1414:
1415: sub getDescription {
1416: my $res = shift;
1417: my $part = shift;
1.69 bowersj2 1418: my $status = $res->status($part);
1.53 bowersj2 1419:
1420: if ($status == $res->NETWORK_FAILURE) { return ""; }
1421: if ($status == $res->NOTHING_SET) {
1422: return "Not currently assigned.";
1423: }
1424: if ($status == $res->OPEN_LATER) {
1.73 bowersj2 1425: return "Open " . timeToHumanString($res->opendate($part));
1.53 bowersj2 1426: }
1427: if ($status == $res->OPEN) {
1.79 bowersj2 1428: if ($res->duedate($part)) {
1.73 bowersj2 1429: return "Due " . timeToHumanString($res->duedate($part));
1.66 bowersj2 1430: } else {
1431: return "Open, no due date";
1432: }
1.53 bowersj2 1433: }
1.54 bowersj2 1434: if ($status == $res->PAST_DUE_ANSWER_LATER) {
1.73 bowersj2 1435: return "Answer open " . timeToHumanString($res->answerdate($part));
1.54 bowersj2 1436: }
1437: if ($status == $res->PAST_DUE_NO_ANSWER) {
1.73 bowersj2 1438: return "Was due " . timeToHumanString($res->duedate($part));
1.53 bowersj2 1439: }
1440: if ($status == $res->ANSWER_OPEN) {
1441: return "Answer available";
1442: }
1.59 bowersj2 1443: if ($status == $res->EXCUSED) {
1.66 bowersj2 1444: return "Excused by instructor";
1.59 bowersj2 1445: }
1.69 bowersj2 1446: if ($status == $res->ATTEMPTED) {
1447: return "Not yet graded.";
1448: }
1.59 bowersj2 1449: if ($status == $res->TRIES_LEFT) {
1.79 bowersj2 1450: my $tries = $res->tries($part);
1451: my $maxtries = $res->maxtries($part);
1452: my $triesString = "";
1453: if ($tries && $maxtries) {
1454: $triesString = "<font size=\"-1\"><i>($tries of $maxtries tries used)</i></font>";
1455: if ($maxtries > 1 && $maxtries - $tries == 1) {
1456: $triesString = "<b>$triesString</b>";
1457: }
1458: }
1.66 bowersj2 1459: if ($res->duedate()) {
1.73 bowersj2 1460: return "Due " . timeToHumanString($res->duedate($part)) .
1.66 bowersj2 1461: " $triesString";
1462: } else {
1463: return "No due date $triesString";
1464: }
1.59 bowersj2 1465: }
1.53 bowersj2 1466: }
1467:
1.68 bowersj2 1468: sub advancedUser {
1469: return $ENV{'user.adv'};
1470: }
1471:
1.73 bowersj2 1472:
1473: # timeToHumanString takes a time number and converts it to a
1474: # human-readable representation, meant to be used in the following
1475: # manner:
1476: # print "Due $timestring"
1477: # print "Open $timestring"
1478: # print "Answer available $timestring"
1479: # Very, very, very, VERY English-only... goodness help a localizer on
1480: # this func...
1.53 bowersj2 1481: sub timeToHumanString {
1.58 albertel 1482: my ($time) = @_;
1483: # zero, '0' and blank are bad times
1.73 bowersj2 1484: if (!$time) {
1485: return 'never';
1486: }
1487:
1488: my $now = time();
1489:
1490: my @time = localtime($time);
1491: my @now = localtime($now);
1492:
1493: # Positive = future
1494: my $delta = $time - $now;
1495:
1496: my $minute = 60;
1497: my $hour = 60 * $minute;
1498: my $day = 24 * $hour;
1499: my $week = 7 * $day;
1500: my $inPast = 0;
1501:
1502: # Logic in comments:
1503: # Is it now? (extremely unlikely)
1504: if ( $delta == 0 ) {
1505: return "this instant";
1506: }
1507:
1508: if ($delta < 0) {
1509: $inPast = 1;
1510: $delta = -$delta;
1511: }
1512:
1513: # Is it in the future?
1514: if ( $delta > 0 ) {
1515: # Is it less then a minute away?
1516: my $tense = $inPast ? " ago" : "";
1517: my $prefix = $inPast ? "" : "in ";
1518: if ( $delta < $minute ) {
1519: if ($delta == 1) { return "${prefix}1 second$tense"; }
1520: return "$prefix$delta seconds$tense";
1521: }
1522:
1523: # Is it less then an hour away?
1524: if ( $delta < $hour ) {
1525: # If so, use minutes
1526: my $minutes = floor($delta / 60);
1527: if ($minutes == 1) { return "${prefix}1 minute$tense"; }
1528: return "$prefix$minutes minutes$tense";
1529: }
1530:
1531: # Is it less then 24 hours away? If so,
1532: # display hours + minutes
1533: if ( $delta < $hour * 24) {
1534: my $hours = floor($delta / $hour);
1535: my $minutes = floor(($delta % $hour) / $minute);
1536: my $hourString = "$hours hours";
1537: my $minuteString = ", $minutes minutes";
1538: if ($hours == 1) {
1539: $hourString = "1 hour";
1540: }
1541: if ($minutes == 1) {
1542: $minuteString = ", 1 minute";
1543: }
1544: if ($minutes == 0) {
1545: $minuteString = "";
1546: }
1547: return "$prefix$hourString$minuteString$tense";
1548: }
1549:
1550: # Less then 5 days away, display day of the week and
1551: # HH:MM
1552: if ( $delta < $day * 5 ) {
1.85 bowersj2 1553: my $timeStr = strftime("%A, %b %e at %I:%M %P", localtime($time));
1.73 bowersj2 1554: $timeStr =~ s/12:00 am/midnight/;
1555: $timeStr =~ s/12:00 pm/noon/;
1556: return ($inPast ? "last " : "next ") .
1557: $timeStr;
1558: }
1559:
1560: # Is it this year?
1561: if ( $time[5] == $now[5]) {
1562: # Return on Month Day, HH:MM meridian
1563: my $timeStr = strftime("on %A, %b %e at %I:%M %P", localtime($time));
1564: $timeStr =~ s/12:00 am/midnight/;
1565: $timeStr =~ s/12:00 pm/noon/;
1566: return $timeStr;
1567: }
1568:
1569: # Not this year, so show the year
1570: my $timeStr = strftime("on %A, %b %e %G at %I:%M %P", localtime($time));
1571: $timeStr =~ s/12:00 am/midnight/;
1572: $timeStr =~ s/12:00 pm/noon/;
1573: return $timeStr;
1.58 albertel 1574: }
1.53 bowersj2 1575: }
1576:
1.51 bowersj2 1577: 1;
1578:
1579: package Apache::lonnavmaps::navmap;
1580:
1581: =pod
1582:
1583: 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.
1584:
1585: =head1 navmap object: Encapsulating the compiled nav map
1586:
1587: navmap is an object that encapsulates a compiled course map and provides a reasonable interface to it.
1588:
1589: 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.
1590:
1591: You must obtain resource objects through the navmap object.
1592:
1593: =head2 Methods
1594:
1595: =over 4
1596:
1.70 bowersj2 1597: =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 1598:
1599: =item * B<getIterator>(first, finish, filter, condition): See iterator documentation below.
1600:
1601: =cut
1602:
1603: use strict;
1604: use GDBM_File;
1605:
1606: sub new {
1607: # magic invocation to create a class instance
1608: my $proto = shift;
1609: my $class = ref($proto) || $proto;
1610: my $self = {};
1611:
1612: $self->{NAV_HASH_FILE} = shift;
1613: $self->{PARM_HASH_FILE} = shift;
1614: $self->{GENERATE_COURSE_USER_OPT} = shift;
1.55 bowersj2 1615: $self->{GENERATE_EMAIL_DISCUSS_STATUS} = shift;
1.51 bowersj2 1616:
1617: # Resource cache stores navmapresource's as we reference them. We generate
1618: # them on-demand so we don't pay for creating resources unless we use them.
1619: $self->{RESOURCE_CACHE} = {};
1620:
1621: # Network failure flag, if we accessed the course or user opt and
1622: # failed
1623: $self->{NETWORK_FAILURE} = 0;
1624:
1625: # tie the nav hash
1626: my %navmaphash;
1627: if (!(tie(%navmaphash, 'GDBM_File', $self->{NAV_HASH_FILE},
1628: &GDBM_READER(), 0640))) {
1629: return undef;
1630: }
1631: $self->{NAV_HASH} = \%navmaphash;
1632:
1633: my %parmhash;
1634: if (!(tie(%parmhash, 'GDBM_File', $self->{PARM_HASH_FILE},
1635: &GDBM_READER(), 0640)))
1636: {
1.66 bowersj2 1637: untie $self->{PARM_HASH};
1.51 bowersj2 1638: return undef;
1639: }
1640: $self->{PARM_HASH} = \%parmhash;
1641: $self->{HASH_TIED} = 1;
1642:
1643: # If the course opt hash and the user opt hash should be generated,
1644: # generate them
1645: if ($self->{GENERATE_COURSE_USER_OPT}) {
1646: my $uname=$ENV{'user.name'};
1647: my $udom=$ENV{'user.domain'};
1648: my $uhome=$ENV{'user.home'};
1649: my $cid=$ENV{'request.course.id'};
1650: my $chome=$ENV{'course.'.$cid.'.home'};
1651: my ($cdom,$cnum)=split(/\_/,$cid);
1652:
1653: my $userprefix=$uname.'_'.$udom.'_';
1654:
1655: my %courserdatas; my %useropt; my %courseopt;
1656: unless ($uhome eq 'no_host') {
1657: # ------------------------------------------------- Get coursedata (if present)
1658: unless ((time-$courserdatas{$cid.'.last_cache'})<240) {
1659: my $reply=&Apache::lonnet::reply('dump:'.$cdom.':'.$cnum.
1660: ':resourcedata',$chome);
1661: if ($reply!~/^error\:/) {
1662: $courserdatas{$cid}=$reply;
1663: $courserdatas{$cid.'.last_cache'}=time;
1664: }
1665: # check to see if network failed
1666: elsif ( $reply=~/no.such.host/i || $reply=~/con.*lost/i )
1667: {
1668: $self->{NETWORK_FAILURE} = 1;
1669: }
1670: }
1671: foreach (split(/\&/,$courserdatas{$cid})) {
1672: my ($name,$value)=split(/\=/,$_);
1673: $courseopt{$userprefix.&Apache::lonnet::unescape($name)}=
1674: &Apache::lonnet::unescape($value);
1675: }
1676: # --------------------------------------------------- Get userdata (if present)
1677: unless ((time-$userrdatas{$uname.'___'.$udom.'.last_cache'})<240) {
1678: my $reply=&Apache::lonnet::reply('dump:'.$udom.':'.$uname.':resourcedata',$uhome);
1679: if ($reply!~/^error\:/) {
1680: $userrdatas{$uname.'___'.$udom}=$reply;
1681: $userrdatas{$uname.'___'.$udom.'.last_cache'}=time;
1682: }
1683: # check to see if network failed
1684: elsif ( $reply=~/no.such.host/i || $reply=~/con.*lost/i )
1685: {
1686: $self->{NETWORK_FAILURE} = 1;
1687: }
1688: }
1689: foreach (split(/\&/,$userrdatas{$uname.'___'.$udom})) {
1690: my ($name,$value)=split(/\=/,$_);
1691: $useropt{$userprefix.&Apache::lonnet::unescape($name)}=
1692: &Apache::lonnet::unescape($value);
1693: }
1.55 bowersj2 1694: $self->{COURSE_OPT} = \%courseopt;
1695: $self->{USER_OPT} = \%useropt;
1.51 bowersj2 1696: }
1697: }
1698:
1.55 bowersj2 1699: if ($self->{GENERATE_EMAIL_DISCUSS_STATUS}) {
1700: my $cid=$ENV{'request.course.id'};
1701: my ($cdom,$cnum)=split(/\_/,$cid);
1702:
1703: my %emailstatus = &Apache::lonnet::dump('email_status');
1.56 bowersj2 1704: my $logoutTime = $emailstatus{'logout'};
1705: my $courseLeaveTime = $emailstatus{'logout_'.$ENV{'request.course.id'}};
1.55 bowersj2 1706: $self->{LAST_CHECK} = ($courseLeaveTime > $logoutTime ?
1707: $courseLeaveTime : $logoutTime);
1.56 bowersj2 1708: my %discussiontime = &Apache::lonnet::dump('discussiontimes',
1.55 bowersj2 1709: $cdom, $cnum);
1710: my %feedback=();
1711: my %error=();
1712: my $keys = &Apache::lonnet::reply('keys:'.
1713: $ENV{'user.domain'}.':'.
1714: $ENV{'user.name'}.':nohist_email',
1715: $ENV{'user.home'});
1716:
1717: foreach my $msgid (split(/\&/, $keys)) {
1718: $msgid=&Apache::lonnet::unescape($msgid);
1719: my $plain=&Apache::lonnet::unescape(&Apache::lonnet::unescape($msgid));
1720: if ($plain=~/(Error|Feedback) \[([^\]]+)\]/) {
1721: my ($what,$url)=($1,$2);
1722: my %status=
1723: &Apache::lonnet::get('email_status',[$msgid]);
1724: if ($status{$msgid}=~/^error\:/) {
1725: $status{$msgid}='';
1726: }
1727:
1728: if (($status{$msgid} eq 'new') ||
1729: (!$status{$msgid})) {
1730: if ($what eq 'Error') {
1731: $error{$url}.=','.$msgid;
1732: } else {
1733: $feedback{$url}.=','.$msgid;
1734: }
1735: }
1736: }
1737: }
1738:
1739: $self->{FEEDBACK} = \%feedback;
1740: $self->{ERROR_MSG} = \%error; # what is this? JB
1741: $self->{DISCUSSION_TIME} = \%discussiontime;
1742: $self->{EMAIL_STATUS} = \%emailstatus;
1743:
1744: }
1.84 bowersj2 1745:
1746: $self->{PARM_CACHE} = {};
1.55 bowersj2 1747:
1.51 bowersj2 1748: bless($self);
1.55 bowersj2 1749:
1750: return $self;
1751: }
1.51 bowersj2 1752:
1.55 bowersj2 1753: # Checks to see if coursemap is defined, matching test in old lonnavmaps
1754: sub courseMapDefined {
1755: my $self = shift;
1756: my $uri = &Apache::lonnet::clutter($ENV{'request.course.uri'});
1757:
1.56 bowersj2 1758: my $firstres = $self->{NAV_HASH}->{"map_start_$uri"};
1759: my $lastres = $self->{NAV_HASH}->{"map_finish_$uri"};
1.55 bowersj2 1760: return $firstres && $lastres;
1.51 bowersj2 1761: }
1762:
1763: sub getIterator {
1764: my $self = shift;
1765: my $iterator = Apache::lonnavmaps::iterator->new($self, shift, shift,
1.89 bowersj2 1766: shift, undef, shift,
1767: $ENV{'form.direction'});
1.51 bowersj2 1768: return $iterator;
1769: }
1770:
1771: # unties the hash when done
1772: sub untieHashes {
1773: my $self = shift;
1.60 bowersj2 1774: untie %{$self->{NAV_HASH}} if ($self->{HASH_TIED});
1775: untie %{$self->{PARM_HASH}} if ($self->{HASH_TIED});
1.51 bowersj2 1776: $self->{HASH_TIED} = 0;
1777: }
1778:
1779: # when the object is destroyed, be sure to untie all the hashes we tied.
1780: sub DESTROY {
1781: my $self = shift;
1782: $self->untieHashes();
1783: }
1784:
1.59 bowersj2 1785: # Private function: Does the given resource (as a symb string) have
1786: # current discussion? Returns 0 if chat/mail data not extracted.
1787: sub hasDiscussion {
1788: my $self = shift;
1789: my $symb = shift;
1790: if (!defined($self->{DISCUSSION_TIME})) { return 0; }
1791:
1792: return $self->{DISCUSSION_TIME}->{$symb} >
1.66 bowersj2 1793: $self->{LAST_CHECK};
1.59 bowersj2 1794: }
1795:
1796: # Private function: Does the given resource (as a symb string) have
1797: # current feedback? Returns the string in the feedback hash, which
1798: # will be false if it does not exist.
1799: sub getFeedback {
1800: my $self = shift;
1801: my $symb = shift;
1802:
1803: if (!defined($self->{FEEDBACK})) { return ""; }
1804:
1805: return $self->{FEEDBACK}->{$symb};
1806: }
1807:
1.51 bowersj2 1808: =pod
1809:
1810: =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.
1811:
1812: =cut
1813:
1814: # The strategy here is to cache the resource objects, and only construct them
1815: # as we use them. The real point is to prevent reading any more from the tied
1816: # hash then we have to, which should hopefully alleviate speed problems.
1817: # Caching is just an incidental detail I throw in because it makes sense.
1818:
1819: sub getById {
1820: my $self = shift;
1821: my $id = shift;
1822:
1823: if (defined ($self->{RESOURCE_CACHE}->{$id}))
1824: {
1825: return $self->{RESOURCE_CACHE}->{$id};
1826: }
1827:
1828: # resource handles inserting itself into cache.
1829: return Apache::lonnavmaps::resource->new($self, $id);
1830: }
1831:
1832: =pod
1833:
1834: =item * B<firstResource>(): Returns a resource object reference corresponding to the first resource in the navmap.
1835:
1836: =cut
1837:
1838: sub firstResource {
1839: my $self = shift;
1840: my $firstResource = $self->{NAV_HASH}->{'map_start_' .
1841: &Apache::lonnet::clutter($ENV{'request.course.uri'})};
1842: return $self->getById($firstResource);
1843: }
1844:
1845: =pod
1846:
1847: =item * B<finishResource>(): Returns a resource object reference corresponding to the last resource in the navmap.
1848:
1849: =cut
1850:
1851: sub finishResource {
1852: my $self = shift;
1853: my $firstResource = $self->{NAV_HASH}->{'map_finish_' .
1854: &Apache::lonnet::clutter($ENV{'request.course.uri'})};
1855: return $self->getById($firstResource);
1856: }
1857:
1858: # -------------------------------------------- Figure out a cascading parameter
1859: #
1860: # For this function to work
1861: #
1862: # * parmhash needs to be tied
1863: # * courseopt and useropt need to be initialized for this user and course
1864: #
1865:
1866: sub parmval {
1867: my $self = shift;
1868: my ($what,$symb)=@_;
1.84 bowersj2 1869: my $hashkey = $what."|||".$symb;
1870:
1871: if (defined($self->{PARM_CACHE}->{$hashkey})) {
1872: return $self->{PARM_CACHE}->{$hashkey};
1873: }
1874:
1875: my $result = $self->parmval_real($what, $symb);
1876: $self->{PARM_CACHE}->{$hashkey} = $result;
1877: return $result;
1878: }
1879:
1880: sub parmval_real {
1881: my $self = shift;
1882: my ($what,$symb) = @_;
1883:
1.51 bowersj2 1884: my $cid=$ENV{'request.course.id'};
1885: my $csec=$ENV{'request.course.sec'};
1886: my $uname=$ENV{'user.name'};
1887: my $udom=$ENV{'user.domain'};
1888:
1889: unless ($symb) { return ''; }
1890: my $result='';
1891:
1892: my ($mapname,$id,$fn)=split(/\_\_\_/,$symb);
1893:
1894: # ----------------------------------------------------- Cascading lookup scheme
1895: my $rwhat=$what;
1896: $what=~s/^parameter\_//;
1897: $what=~s/\_/\./;
1898:
1899: my $symbparm=$symb.'.'.$what;
1900: my $mapparm=$mapname.'___(all).'.$what;
1901: my $usercourseprefix=$uname.'_'.$udom.'_'.$cid;
1902:
1903: my $seclevel= $usercourseprefix.'.['.$csec.'].'.$what;
1904: my $seclevelr=$usercourseprefix.'.['.$csec.'].'.$symbparm;
1905: my $seclevelm=$usercourseprefix.'.['.$csec.'].'.$mapparm;
1906:
1907: my $courselevel= $usercourseprefix.'.'.$what;
1908: my $courselevelr=$usercourseprefix.'.'.$symbparm;
1909: my $courselevelm=$usercourseprefix.'.'.$mapparm;
1910:
1911: my $useropt = $self->{USER_OPT};
1912: my $courseopt = $self->{COURSE_OPT};
1913: my $parmhash = $self->{PARM_HASH};
1914:
1915: # ---------------------------------------------------------- first, check user
1916: if ($uname and defined($useropt)) {
1.57 albertel 1917: if (defined($$useropt{$courselevelr})) { return $$useropt{$courselevelr}; }
1918: if (defined($$useropt{$courselevelm})) { return $$useropt{$courselevelm}; }
1919: if (defined($$useropt{$courselevel})) { return $$useropt{$courselevel}; }
1.51 bowersj2 1920: }
1921:
1922: # ------------------------------------------------------- second, check course
1923: if ($csec and defined($courseopt)) {
1.57 albertel 1924: if (defined($$courseopt{$seclevelr})) { return $$courseopt{$seclevelr}; }
1925: if (defined($$courseopt{$seclevelm})) { return $$courseopt{$seclevelm}; }
1926: if (defined($$courseopt{$seclevel})) { return $$courseopt{$seclevel}; }
1.51 bowersj2 1927: }
1928:
1929: if (defined($courseopt)) {
1.57 albertel 1930: if (defined($$courseopt{$courselevelr})) { return $$courseopt{$courselevelr}; }
1931: if (defined($$courseopt{$courselevelm})) { return $$courseopt{$courselevelm}; }
1932: if (defined($$courseopt{$courselevel})) { return $$courseopt{$courselevel}; }
1.51 bowersj2 1933: }
1934:
1935: # ----------------------------------------------------- third, check map parms
1936:
1937: my $thisparm=$$parmhash{$symbparm};
1.57 albertel 1938: if (defined($thisparm)) { return $thisparm; }
1.51 bowersj2 1939:
1940: # ----------------------------------------------------- fourth , check default
1941:
1942: my $default=&Apache::lonnet::metadata($fn,$rwhat.'.default');
1.57 albertel 1943: if (defined($default)) { return $default}
1.51 bowersj2 1944:
1945: # --------------------------------------------------- fifth , cascade up parts
1946:
1947: my ($space,@qualifier)=split(/\./,$rwhat);
1948: my $qualifier=join('.',@qualifier);
1949: unless ($space eq '0') {
1950: my ($part,$id)=split(/\_/,$space);
1951: if ($id) {
1952: my $partgeneral=$self->parmval($part.".$qualifier",$symb);
1.57 albertel 1953: if (defined($partgeneral)) { return $partgeneral; }
1.51 bowersj2 1954: } else {
1955: my $resourcegeneral=$self->parmval("0.$qualifier",$symb);
1.57 albertel 1956: if (defined($resourcegeneral)) { return $resourcegeneral; }
1.51 bowersj2 1957: }
1958: }
1959: return '';
1960: }
1961:
1962:
1963: 1;
1964:
1965: package Apache::lonnavmaps::iterator;
1966:
1967: # This package must precede "navmap" because "navmap" uses it. In
1968: # order to keep the documentation order straight, the iterator is documented
1969: # after the navmap object.
1970:
1971: =pod
1972:
1973: =back
1974:
1975: =head1 navmap Iterator
1976:
1977: 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.
1978:
1979: 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:
1980:
1981: C<my $resourceIterator = $navmap-E<gt>getIterator();>
1982:
1983: To get the next thing from the iterator, call B<next>:
1984:
1985: C<my $nextThing = $resourceIterator-E<gt>next()>
1986:
1987: getIterator behaves as follows:
1988:
1989: =over 4
1990:
1.89 bowersj2 1991: =item B<getIterator>(firstResource, finishResource, filterHash, condition, direction): 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. Direction specifies which direction to recurse, either FORWARD or BACKWARD, with FORWARD being default.
1.51 bowersj2 1992:
1.70 bowersj2 1993: 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 1994:
1995: 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:
1996:
1997: =over 4
1998:
1.70 bowersj2 1999: =item * BEGIN_MAP: A new map is being recursed into. This is returned I<after> the map resource itself is returned.
2000:
2001: =item * END_MAP: The map is now done.
2002:
2003: =item * BEGIN_BRANCH: A branch is now starting. The next resource returned will be the first in that branch.
2004:
2005: =item * END_BRANCH: The branch is now done.
1.51 bowersj2 2006:
2007: =back
2008:
1.70 bowersj2 2009: The tokens are retreivable via methods on the iterator object, i.e., $iterator->END_MAP.
2010:
2011: =back
1.51 bowersj2 2012:
2013: =cut
2014:
2015: # Here are the tokens for the iterator:
2016:
2017: sub BEGIN_MAP { return 1; } # begining of a new map
2018: sub END_MAP { return 2; } # end of the map
2019: sub BEGIN_BRANCH { return 3; } # beginning of a branch
2020: sub END_BRANCH { return 4; } # end of a branch
1.89 bowersj2 2021: sub FORWARD { return 1; } # go forward
2022: sub BACKWARD { return 2; }
1.51 bowersj2 2023:
2024: # Params: nav map, start resource, end resource, filter, condition,
2025: # already seen hash ref
2026:
2027: sub new {
2028: # magic invocation to create a class instance
2029: my $proto = shift;
2030: my $class = ref($proto) || $proto;
2031: my $self = {};
2032:
2033: $self->{NAV_MAP} = shift;
2034: return undef unless ($self->{NAV_MAP});
2035:
2036: # Handle the parameters
2037: $self->{FIRST_RESOURCE} = shift || $self->{NAV_MAP}->firstResource();
2038: $self->{FINISH_RESOURCE} = shift || $self->{NAV_MAP}->finishResource();
2039:
2040: # If the given resources are just the ID of the resource, get the
2041: # objects
2042: if (!ref($self->{FIRST_RESOURCE})) { $self->{FIRST_RESOURCE} =
2043: $self->{NAV_MAP}->getById($self->{FIRST_RESOURCE}); }
2044: if (!ref($self->{FINISH_RESOURCE})) { $self->{FINISH_RESOURCE} =
2045: $self->{NAV_MAP}->getById($self->{FINISH_RESOURCE}); }
2046:
2047: $self->{FILTER} = shift;
2048:
2049: # A hash, used as a set, of resource already seen
2050: $self->{ALREADY_SEEN} = shift;
2051: if (!defined($self->{ALREADY_SEEN})) { $self->{ALREADY_SEEN} = {} };
1.63 bowersj2 2052: $self->{CONDITION} = shift;
1.89 bowersj2 2053: $self->{DIRECTION} = shift || FORWARD();
1.51 bowersj2 2054:
2055: # Flag: Have we started yet? If not, the first action is to return BEGIN_MAP.
2056: $self->{STARTED} = 0;
2057:
2058: # Should we continue calling the recursive iterator, if any?
2059: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
2060: # The recursive iterator, if any
2061: $self->{RECURSIVE_ITERATOR} = undef;
2062: # Are we recursing on a map, or a branch?
2063: $self->{RECURSIVE_MAP} = 1; # we'll manually unset this when recursing on branches
2064: # And the count of how deep it is, so that this iterator can keep track of
2065: # when to pick back up again.
2066: $self->{RECURSIVE_DEPTH} = 0;
2067:
2068: # For keeping track of our branches, we maintain our own stack
2069: $self->{BRANCH_STACK} = [];
2070: # If the size shrinks, we exhausted a branch
2071: $self->{BRANCH_STACK_SIZE} = 0;
2072: $self->{BRANCH_DEPTH} = 0;
2073:
2074: # For returning two things in a forced sequence
2075: $self->{FORCE_NEXT} = undef;
2076:
2077: # Start with the first resource
1.89 bowersj2 2078: if ($self->{DIRECTION} == FORWARD) {
2079: push @{$self->{BRANCH_STACK}}, $self->{FIRST_RESOURCE};
2080: } else {
1.90 bowersj2 2081: push @{$self->{BRANCH_STACK}}, $self->{FINISH_RESOURCE};
1.89 bowersj2 2082: }
1.51 bowersj2 2083: $self->{BRANCH_STACK_SIZE} = 1;
2084:
2085: bless($self);
2086: return $self;
2087: }
2088:
2089: # Note... this function is *touchy*. I strongly recommend tracing
2090: # through it with the debugger a few times on a non-trivial map before
2091: # modifying it. Order is *everything*.
2092: sub next {
2093: my $self = shift;
2094:
2095: # Iterator logic goes here
2096:
2097: # Are we using a recursive iterator? If so, pull from that and
2098: # watch the depth; we want to resume our level at the correct time.
2099: if ($self->{RECURSIVE_ITERATOR_FLAG})
2100: {
2101: # grab the next from the recursive iterator
2102: my $next = $self->{RECURSIVE_ITERATOR}->next();
2103:
2104: # is it a begin or end map? Update depth if so
2105: if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
2106: if ($next == END_MAP() ) { $self->{RECURSIVE_DEPTH}--; }
2107:
2108: # Are we back at depth 0? If so, stop recursing.
2109: if ($self->{RECURSIVE_DEPTH} == 0) {
2110: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
2111: }
2112:
2113: return $next;
2114: }
2115:
1.68 bowersj2 2116: # Is this return value pre-determined?
2117: if (defined($self->{FORCE_NEXT})) {
2118: my $tmp = $self->{FORCE_NEXT};
2119: $self->{FORCE_NEXT} = undef;
2120: return $tmp;
2121: }
2122:
1.51 bowersj2 2123: # Is there a current resource to grab? If not, then return
2124: # END_BRANCH and END_MAP in succession.
2125: if (scalar(@{$self->{BRANCH_STACK}}) == 0) {
2126: if ($self->{BRANCH_DEPTH} > 0) {
2127: $self->{FORCE_NEXT} = $self->END_MAP();
1.52 bowersj2 2128: $self->{BRANCH_DEPTH}--;
1.51 bowersj2 2129: return $self->END_BRANCH();
2130: } else {
2131: return $self->END_MAP();
2132: }
2133: }
2134:
2135: # Have we not yet begun? If not, return BEGIN_MAP and
2136: # remember that we've started.
2137: if ( !$self->{STARTED} ) {
2138: $self->{STARTED} = 1;
2139: return $self->BEGIN_MAP;
2140: }
2141:
2142: # Did the branch stack shrink since last run? If so,
2143: # we exhausted a branch last time, therefore, we're about
2144: # to start a new one. (We know because we already checked to see
2145: # if the stack was empty.)
2146: if ( scalar (@{$self->{BRANCH_STACK}}) < $self->{BRANCH_STACK_SIZE}) {
1.52 bowersj2 2147: $self->{BRANCH_STACK_SIZE} = scalar(@{$self->{BRANCH_STACK}});
2148: $self->{BRANCH_DEPTH}++;
2149: return $self->BEGIN_BRANCH();
1.51 bowersj2 2150: }
2151:
1.52 bowersj2 2152: # Remember the size for comparision next time.
2153: $self->{BRANCH_STACK_SIZE} = scalar(@{$self->{BRANCH_STACK}});
2154:
2155: # If the next resource we mean to return is going to need
2156: # a lower branch level, terminate branches until we get
2157: # there.
2158:
1.51 bowersj2 2159: # Get the next resource in the branch
2160: $self->{HERE} = pop @{$self->{BRANCH_STACK}};
1.52 bowersj2 2161:
2162: # Are we at the right depth? If not, close a branch and return
2163: # the current resource onto the branch stack
2164: if (defined($self->{HERE}->{DATA}->{ITERATOR_DEPTH})
2165: && $self->{HERE}->{DATA}->{ITERATOR_DEPTH} <
2166: $self->{BRANCH_DEPTH} ) {
2167: $self->{BRANCH_DEPTH}--;
2168: # return it so we can pick it up eventually
2169: push @{$self->{BRANCH_STACK}}, $self->{HERE};
2170: return $self->END_BRANCH();
2171: }
2172:
1.51 bowersj2 2173: # We always return it after this point and never before
2174: # (proof: look at just the return statements), so we
2175: # remember that we've seen this.
2176: $self->{ALREADY_SEEN}->{$self->{HERE}->{ID}} = 1;
2177:
2178: # Get the next possible resources
1.90 bowersj2 2179: my $nextUnfiltered;
1.89 bowersj2 2180: if ($self->{DIRECTION} == FORWARD()) {
1.90 bowersj2 2181: $nextUnfiltered = $self->{HERE}->getNext();
1.89 bowersj2 2182: } else {
1.90 bowersj2 2183: $nextUnfiltered = $self->{HERE}->getPrevious();
1.89 bowersj2 2184: }
1.51 bowersj2 2185: my $next = [];
2186:
2187: # filter the next possibilities to remove things we've
1.52 bowersj2 2188: # already seen. Also, remember what branch depth they should
2189: # be displayed at, since there's no other reliable way to tell.
1.51 bowersj2 2190: foreach (@$nextUnfiltered) {
1.52 bowersj2 2191: if (!defined($self->{ALREADY_SEEN}->{$_->{ID}})) {
2192: push @$next, $_;
2193: $_->{DATA}->{ITERATOR_DEPTH} =
2194: $self->{BRANCH_DEPTH} + 1;
2195: }
1.51 bowersj2 2196: }
2197:
2198: # Handle branch cases:
2199: # Nothing is available next: BRANCH_END
2200: # 1 thing next: standard non-branch
2201: # 2+ things next: have some branches
2202: my $nextCount = scalar(@$next);
2203: if ($nextCount == 0) {
1.52 bowersj2 2204: # Return this and on the next run, close the branch up if we're
2205: # in a branch
2206: if ($self->{BRANCH_DEPTH} > 0 ) {
2207: $self->{FORCE_NEXT} = $self->END_BRANCH();
2208: $self->{BRANCH_DEPTH}--;
2209: }
1.51 bowersj2 2210: }
2211:
2212: while (@$next) {
2213: # copy the next possibilities over to the branch stack
2214: # in the right order
1.52 bowersj2 2215: push @{$self->{BRANCH_STACK}}, shift @$next;
1.51 bowersj2 2216: }
2217:
2218: if ($nextCount >= 2) {
1.52 bowersj2 2219: $self->{FORCE_NEXT} = $self->BEGIN_BRANCH();
2220: $self->{BRANCH_DEPTH}++;
1.51 bowersj2 2221: return $self->{HERE};
2222: }
2223:
2224: # If this is a map and we want to recurse down it... (not filtered out)
1.70 bowersj2 2225: if ($self->{HERE}->is_map() &&
1.63 bowersj2 2226: (defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {
1.51 bowersj2 2227: $self->{RECURSIVE_ITERATOR_FLAG} = 1;
2228: my $firstResource = $self->{HERE}->map_start();
2229: my $finishResource = $self->{HERE}->map_finish();
2230:
2231: $self->{RECURSIVE_ITERATOR} =
2232: Apache::lonnavmaps::iterator->new ($self->{NAV_MAP}, $firstResource,
1.63 bowersj2 2233: $finishResource, $self->{FILTER}, $self->{ALREADY_SEEN},
1.91 ! bowersj2 2234: $self->{CONDITION}, $self->{DIRECTION});
1.51 bowersj2 2235: }
2236:
2237: return $self->{HERE};
2238: }
2239:
2240: =pod
2241:
2242: 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).
2243:
2244: =cut
2245:
2246: sub getStack {
2247: my $self=shift;
2248:
2249: my @stack;
2250:
2251: $self->populateStack(\@stack);
2252:
2253: return \@stack;
2254: }
2255:
2256: # Private method: Calls the iterators recursively to populate the stack.
2257: sub populateStack {
2258: my $self=shift;
2259: my $stack = shift;
2260:
1.88 bowersj2 2261: push @$stack, $self->{HERE} if ($self->{HERE});
1.51 bowersj2 2262:
2263: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
2264: $self->{RECURSIVE_ITERATOR}->populateStack($stack);
2265: }
2266: }
2267:
1.1 www 2268: 1;
1.2 www 2269:
1.51 bowersj2 2270: package Apache::lonnavmaps::resource;
2271:
2272: use Apache::lonnet;
2273:
2274: =pod
2275:
2276: =head1 Object: resource
2277:
2278: 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.
2279:
2280: A resource only makes sense in the context of a navmap, as some of the data is stored in the navmap object.
2281:
2282: You will probably never need to instantiate this object directly. Use Apache::lonnavmap::navmap, and use the "start" method to obtain the starting resource.
2283:
2284: =head2 Public Members
2285:
2286: 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.
2287:
2288: =head2 Methods
2289:
2290: =over 4
2291:
1.70 bowersj2 2292: =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.
2293:
2294: =back
1.51 bowersj2 2295:
2296: =cut
2297:
2298: sub new {
2299: # magic invocation to create a class instance
2300: my $proto = shift;
2301: my $class = ref($proto) || $proto;
2302: my $self = {};
2303:
2304: $self->{NAV_MAP} = shift;
2305: $self->{ID} = shift;
2306:
2307: # Store this new resource in the parent nav map's cache.
2308: $self->{NAV_MAP}->{RESOURCE_CACHE}->{$self->{ID}} = $self;
1.66 bowersj2 2309: $self->{RESOURCE_ERROR} = 0;
1.51 bowersj2 2310:
2311: # A hash that can be used by two-pass algorithms to store data
2312: # about this resource in. Not used by the resource object
2313: # directly.
2314: $self->{DATA} = {};
2315:
2316: bless($self);
2317:
2318: return $self;
2319: }
2320:
1.70 bowersj2 2321: # private function: simplify the NAV_HASH lookups we keep doing
2322: # pass the name, and to automatically append my ID, pass a true val on the
2323: # second param
2324: sub navHash {
2325: my $self = shift;
2326: my $param = shift;
2327: my $id = shift;
2328: return $self->{NAV_MAP}->{NAV_HASH}->{$param . ($id?$self->{ID}:"")};
2329: }
2330:
1.51 bowersj2 2331: =pod
2332:
1.70 bowersj2 2333: B<Metadata Retreival>
2334:
2335: These are methods that help you retrieve metadata about the resource:
2336:
2337: =over 4
2338:
2339: =item * B<ext>: Returns true if the resource is external.
2340:
2341: =item * B<goesto>: Returns the "goesto" value from the compiled nav map. (It is likely you want to use B<getNext> instead.)
2342:
2343: =item * B<kind>: Returns the kind of the resource from the compiled nav map.
2344:
2345: =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 2346:
1.70 bowersj2 2347: =item * B<randompick>: Returns true for a map if the randompick feature is being used on the map. (?)
2348:
2349: =item * B<src>: Returns the source for the resource.
2350:
2351: =item * B<symb>: Returns the symb for the resource.
2352:
2353: =item * B<title>: Returns the title of the resource.
2354:
2355: =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 2356:
2357: =back
2358:
2359: =cut
2360:
2361: # These info functions can be used directly, as they don't return
2362: # resource information.
1.85 bowersj2 2363: sub comesfrom { my $self=shift; return $self->navHash("comesfrom_", 1); }
1.70 bowersj2 2364: sub ext { my $self=shift; return $self->navHash("ext_", 1) eq 'true:'; }
1.85 bowersj2 2365: sub from { my $self=shift; return $self->navHash("from_", 1); }
1.51 bowersj2 2366: sub goesto { my $self=shift; return $self->navHash("goesto_", 1); }
2367: sub kind { my $self=shift; return $self->navHash("kind_", 1); }
1.68 bowersj2 2368: sub randomout { my $self=shift; return $self->navHash("randomout_", 1); }
2369: sub randompick {
2370: my $self = shift;
2371: return $self->{NAV_MAP}->{PARM_HASH}->{$self->symb .
2372: '.0.parameter_randompick'};
2373: }
1.51 bowersj2 2374: sub src {
2375: my $self=shift;
2376: return $self->navHash("src_", 1);
2377: }
2378: sub symb {
2379: my $self=shift;
2380: (my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
2381: my $symbSrc = &Apache::lonnet::declutter($self->src());
2382: return &Apache::lonnet::declutter(
2383: $self->navHash('map_id_'.$first))
2384: . '___' . $second . '___' . $symbSrc;
2385: }
1.70 bowersj2 2386: sub title { my $self=shift; return $self->navHash("title_", 1); }
2387: sub to { my $self=shift; return $self->navHash("to_", 1); }
2388:
2389: =pod
2390:
2391: B<Predicate Testing the Resource>
2392:
2393: These methods are shortcuts to deciding if a given resource has a given property.
2394:
2395: =over 4
2396:
2397: =item * B<is_map>: Returns true if the resource is a map type.
2398:
2399: =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.)
2400:
2401: =item * B<is_page>: Returns true if the resource is a page.
2402:
2403: =item * B<is_problem>: Returns true if the resource is a problem.
2404:
2405: =item * B<is_sequence>: Returns true if the resource sequence.
2406:
2407: =back
2408:
2409: =cut
2410:
2411:
2412: sub is_html {
1.51 bowersj2 2413: my $self=shift;
2414: my $src = $self->src();
1.70 bowersj2 2415: return ($src =~ /html$/);
1.51 bowersj2 2416: }
1.70 bowersj2 2417: sub is_map { my $self=shift; return defined($self->navHash("is_map_", 1)); }
2418: sub is_page {
1.51 bowersj2 2419: my $self=shift;
2420: my $src = $self->src();
1.70 bowersj2 2421: return ($src =~ /page$/);
1.51 bowersj2 2422: }
1.70 bowersj2 2423: sub is_problem {
1.51 bowersj2 2424: my $self=shift;
2425: my $src = $self->src();
1.70 bowersj2 2426: return ($src =~ /problem$/);
1.51 bowersj2 2427: }
1.70 bowersj2 2428: sub is_sequence {
1.51 bowersj2 2429: my $self=shift;
2430: my $src = $self->src();
1.70 bowersj2 2431: return ($src =~ /sequence$/);
1.51 bowersj2 2432: }
2433:
2434:
2435:
2436:
1.70 bowersj2 2437:
1.51 bowersj2 2438: # Move this into POD: In order to use these correctly, courseopt
2439: # and useropt need to be generated
2440: sub parmval {
2441: my $self = shift;
2442: my $what = shift;
2443: my $part = shift || "0";
2444: return $self->{NAV_MAP}->parmval($part.'.'.$what, $self->symb());
2445: }
2446:
1.70 bowersj2 2447: =pod
2448:
2449: B<Map Methods>
2450:
2451: These methods are useful for getting information about the map properties of the resource, if the resource is a map (B<is_map>).
2452:
2453: =over 4
2454:
2455: =item * B<map_finish>: Returns a reference to a resource object corresponding to the finish resource of the map.
2456:
2457: =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.
2458:
2459: =item * B<map_start>: Returns a reference to a resource object corresponding to the start resource of the map.
2460:
2461: =item * B<map_type>: Returns a string with the type of the map in it.
2462:
2463: =back
1.51 bowersj2 2464:
1.70 bowersj2 2465: =cut
1.51 bowersj2 2466:
2467: sub map_finish {
2468: my $self = shift;
2469: my $src = $self->src();
2470: my $res = $self->navHash("map_finish_$src", 0);
2471: $res = $self->{NAV_MAP}->getById($res);
2472: return $res;
2473: }
1.70 bowersj2 2474: sub map_pc {
2475: my $self = shift;
2476: my $src = $self->src();
2477: return $self->navHash("map_pc_$src", 0);
2478: }
1.51 bowersj2 2479: sub map_start {
2480: my $self = shift;
2481: my $src = $self->src();
2482: my $res = $self->navHash("map_start_$src", 0);
2483: $res = $self->{NAV_MAP}->getById($res);
2484: return $res;
2485: }
2486: sub map_type {
2487: my $self = shift;
2488: my $pc = $self->map_pc();
2489: return $self->navHash("map_type_$pc", 0);
2490: }
2491:
2492:
2493:
2494: #####
2495: # Property queries
2496: #####
2497:
2498: # These functions will be responsible for returning the CORRECT
2499: # VALUE for the parameter, no matter what. So while they may look
2500: # like direct calls to parmval, they can be more then that.
2501: # So, for instance, the duedate function should use the "duedatetype"
2502: # information, rather then the resource object user.
2503:
2504: =pod
2505:
2506: =head2 Resource Parameters
2507:
1.70 bowersj2 2508: 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 2509:
2510: 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.)
2511:
2512: =over 4
2513:
2514: =item * B<acc>: Get the Client IP/Name Access Control information.
2515:
2516: =item * B<answerdate>: Get the answer-reveal date for the problem.
2517:
2518: =item * B<duedate>: Get the due date for the problem.
2519:
2520: =item * B<tries>: Get the number of tries the student has used on the problem.
2521:
2522: =item * B<maxtries>: Get the number of max tries allowed.
2523:
2524: =item * B<opendate>: Get the open date for the problem.
2525:
2526: =item * B<sig>: Get the significant figures setting.
2527:
2528: =item * B<tol>: Get the tolerance for the problem.
2529:
1.70 bowersj2 2530: =item * B<tries>: Get the number of tries the user has already used on the problem.
2531:
1.51 bowersj2 2532: =item * B<type>: Get the question type for the problem.
2533:
2534: =item * B<weight>: Get the weight for the problem.
2535:
2536: =back
2537:
2538: =cut
2539:
2540: sub acc {
2541: (my $self, my $part) = @_;
2542: return $self->parmval("acc", $part);
2543: }
2544: sub answerdate {
2545: (my $self, my $part) = @_;
2546: # Handle intervals
2547: if ($self->parmval("answerdate.type", $part) eq 'date_interval') {
2548: return $self->duedate($part) +
2549: $self->parmval("answerdate", $part);
2550: }
2551: return $self->parmval("answerdate", $part);
2552: }
2553: sub duedate {
2554: (my $self, my $part) = @_;
2555: return $self->parmval("duedate", $part);
2556: }
2557: sub maxtries {
2558: (my $self, my $part) = @_;
2559: return $self->parmval("maxtries", $part);
2560: }
2561: sub opendate {
2562: (my $self, my $part) = @_;
2563: if ($self->parmval("opendate.type", $part) eq 'date_interval') {
2564: return $self->duedate($part) -
2565: $self->parmval("opendate", $part);
2566: }
2567: return $self->parmval("opendate");
2568: }
2569: sub sig {
2570: (my $self, my $part) = @_;
2571: return $self->parmval("sig", $part);
2572: }
2573: sub tol {
2574: (my $self, my $part) = @_;
2575: return $self->parmval("tol", $part);
2576: }
2577: sub tries {
2578: my $self = shift;
2579: my $part = shift;
2580: $part = '0' if (!defined($part));
2581:
2582: # Make sure return hash is loaded, should error check
2583: $self->getReturnHash();
2584:
2585: my $tries = $self->{RETURN_HASH}->{'resource.'.$part.'.tries'};
2586: if (!defined($tries)) {return '0';}
2587: return $tries;
2588: }
1.70 bowersj2 2589: sub type {
2590: (my $self, my $part) = @_;
2591: return $self->parmval("type", $part);
2592: }
2593: sub weight {
2594: (my $self, my $part) = @_;
2595: return $self->parmval("weight", $part);
2596: }
1.51 bowersj2 2597:
2598: # Multiple things need this
2599: sub getReturnHash {
2600: my $self = shift;
2601:
2602: if (!defined($self->{RETURN_HASH})) {
1.84 bowersj2 2603: my %tmpHash = &Apache::lonnet::restore($self->symb());
1.51 bowersj2 2604: $self->{RETURN_HASH} = \%tmpHash;
2605: }
2606: }
2607:
2608: ######
2609: # Status queries
2610: ######
2611:
2612: # These methods query the status of problems.
2613:
2614: # If we need to count parts, this function determines the number of
2615: # parts from the metadata. When called, it returns a reference to a list
2616: # of strings corresponding to the parts. (Thus, using it in a scalar context
2617: # tells you how many parts you have in the problem:
2618: # $partcount = scalar($resource->countParts());
2619: # Don't use $self->{PARTS} directly because you don't know if it's been
2620: # computed yet.
2621:
2622: =pod
2623:
2624: =head2 Resource misc
2625:
2626: Misc. functions for the resource.
2627:
2628: =over 4
2629:
1.59 bowersj2 2630: =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.
2631:
2632: =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:
2633:
2634: for (split(/\,/, $res->getFeedback())) {
2635: my $link = &Apache::lonnet::escape($_);
2636: ...
2637:
2638: and use the link as appropriate.
2639:
2640: =cut
2641:
2642: sub hasDiscussion {
2643: my $self = shift;
2644: return $self->{NAV_MAP}->hasDiscussion($self->symb());
2645: }
2646:
2647: sub getFeedback {
2648: my $self = shift;
1.85 bowersj2 2649: return $self->{NAV_MAP}->getFeedback($self->src());
1.59 bowersj2 2650: }
2651:
2652: =pod
2653:
1.70 bowersj2 2654: =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 2655:
1.70 bowersj2 2656: =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 2657:
2658: =back
2659:
2660: =cut
2661:
2662: sub parts {
2663: my $self = shift;
2664:
1.67 bowersj2 2665: if ($self->ext) { return ['0']; }
2666:
1.51 bowersj2 2667: $self->extractParts();
2668: return $self->{PARTS};
2669: }
2670:
2671: sub countParts {
2672: my $self = shift;
2673:
2674: my $parts = $self->parts();
1.66 bowersj2 2675:
2676: if ($self->{RESOURCE_ERROR}) {
2677: return 0;
2678: }
2679:
2680: if (scalar(@{$parts}) < 2) { return 1;}
1.51 bowersj2 2681:
2682: return scalar(@{$parts}) - 1;
2683: }
2684:
2685: # Private function: Extracts the parts information and saves it
2686: sub extractParts {
2687: my $self = shift;
2688:
2689: return if ($self->{PARTS});
1.67 bowersj2 2690: return if ($self->ext);
1.51 bowersj2 2691:
2692: $self->{PARTS} = [];
2693:
1.82 bowersj2 2694: # Retrieve part count, if this is a problem
2695: if ($self->is_problem()) {
2696: my $metadata = &Apache::lonnet::metadata($self->src(), 'allpossiblekeys');
2697: if (!$metadata) {
2698: $self->{RESOURCE_ERROR} = 1;
2699: $self->{PARTS} = [];
2700: return;
2701: }
2702:
2703: foreach (split(/\,/,$metadata)) {
2704: if ($_ =~ /^parameter\_(.*)\_opendate$/) {
2705: push @{$self->{PARTS}}, $1;
2706: }
1.51 bowersj2 2707: }
1.82 bowersj2 2708:
2709:
2710: # Is this possible to do in one line? - Jeremy
2711: my @sortedParts = sort @{$self->{PARTS}};
2712: $self->{PARTS} = \@sortedParts;
1.51 bowersj2 2713: }
2714:
2715: return;
2716: }
2717:
2718: =pod
2719:
2720: =head2 Resource Status
2721:
2722: 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.
2723:
2724: There are two aspects to the status: the date-related information and the completion information.
2725:
2726: Idiomatic usage of these two methods would probably look something like
2727:
2728: foreach ($resource->parts()) {
2729: my $dateStatus = $resource->getDateStatus($_);
2730: my $completionStatus = $resource->getCompletionStatus($_);
2731:
1.70 bowersj2 2732: or
2733:
2734: my $status = $resource->status($_);
2735:
1.51 bowersj2 2736: ... use it here ...
2737: }
2738:
2739: =over 4
2740:
1.70 bowersj2 2741: =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 2742:
2743: =back
2744:
2745: B<Date Codes>
2746:
2747: =over 4
2748:
2749: =item * B<OPEN_LATER>: The problem will be opened later.
2750:
2751: =item * B<OPEN>: Open and not yet due.
2752:
1.59 bowersj2 2753:
1.54 bowersj2 2754: =item * B<PAST_DUE_ANSWER_LATER>: The due date has passed, but the answer date has not yet arrived.
2755:
2756: =item * B<PAST_DUE_NO_ANSWER>: The due date has passed and there is no answer opening date set.
1.51 bowersj2 2757:
2758: =item * B<ANSWER_OPEN>: The answer date is here.
2759:
2760: =item * B<NETWORK_FAILURE>: The information is unknown due to network failure.
2761:
2762: =back
2763:
2764: =cut
2765:
2766: # Apparently the compiler optimizes these into constants automatically
1.54 bowersj2 2767: sub OPEN_LATER { return 0; }
2768: sub OPEN { return 1; }
2769: sub PAST_DUE_NO_ANSWER { return 2; }
2770: sub PAST_DUE_ANSWER_LATER { return 3; }
2771: sub ANSWER_OPEN { return 4; }
2772: sub NOTHING_SET { return 5; }
2773: sub NETWORK_FAILURE { return 100; }
2774:
2775: # getDateStatus gets the date status for a given problem part.
2776: # Because answer date, due date, and open date are fully independent
2777: # (i.e., it is perfectly possible to *only* have an answer date),
2778: # we have to completely cover the 3x3 maxtrix of (answer, due, open) x
2779: # (past, future, none given). This function handles this with a decision
2780: # tree. Read the comments to follow the decision tree.
1.51 bowersj2 2781:
2782: sub getDateStatus {
2783: my $self = shift;
2784: my $part = shift;
2785: $part = "0" if (!defined($part));
1.54 bowersj2 2786:
2787: # Always return network failure if there was one.
1.51 bowersj2 2788: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
2789:
2790: my $now = time();
2791:
1.53 bowersj2 2792: my $open = $self->opendate($part);
2793: my $due = $self->duedate($part);
2794: my $answer = $self->answerdate($part);
2795:
2796: if (!$open && !$due && !$answer) {
2797: # no data on the problem at all
2798: # should this be the same as "open later"? think multipart.
2799: return $self->NOTHING_SET;
2800: }
1.59 bowersj2 2801: if (!$open || $now < $open) {return $self->OPEN_LATER}
2802: if (!$due || $now < $due) {return $self->OPEN}
2803: if ($answer && $now < $answer) {return $self->PAST_DUE_ANSWER_LATER}
2804: if ($answer) { return $self->ANSWER_OPEN; }
1.54 bowersj2 2805: return PAST_DUE_NO_ANSWER;
1.51 bowersj2 2806: }
2807:
2808: =pod
2809:
2810: B<>
2811:
2812: =over 4
2813:
2814: =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:
2815:
2816: =back
2817:
2818: B<Completion Codes>
2819:
2820: =over 4
2821:
2822: =item * B<NOT_ATTEMPTED>: Has not been attempted at all.
2823:
2824: =item * B<INCORRECT>: Attempted, but wrong by student.
2825:
2826: =item * B<INCORRECT_BY_OVERRIDE>: Attempted, but wrong by instructor override.
2827:
2828: =item * B<CORRECT>: Correct or correct by instructor.
2829:
2830: =item * B<CORRECT_BY_OVERRIDE>: Correct by instructor override.
2831:
2832: =item * B<EXCUSED>: Excused. Not yet implemented.
2833:
2834: =item * B<NETWORK_FAILURE>: Information not available due to network failure.
2835:
1.69 bowersj2 2836: =item * B<ATTEMPTED>: Attempted, and not yet graded.
2837:
1.51 bowersj2 2838: =back
2839:
2840: =cut
2841:
1.53 bowersj2 2842: sub NOT_ATTEMPTED { return 10; }
2843: sub INCORRECT { return 11; }
2844: sub INCORRECT_BY_OVERRIDE { return 12; }
2845: sub CORRECT { return 13; }
2846: sub CORRECT_BY_OVERRIDE { return 14; }
2847: sub EXCUSED { return 15; }
1.69 bowersj2 2848: sub ATTEMPTED { return 16; }
1.51 bowersj2 2849:
2850: sub getCompletionStatus {
2851: my $self = shift;
2852: my $part = shift;
2853: $part = "0" if (!defined($part));
2854: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
2855:
2856: # Make sure return hash exists
2857: $self->getReturnHash();
2858:
2859: my $status = $self->{RETURN_HASH}->{'resource.'.$part.'.solved'};
2860:
2861: # Left as seperate if statements in case we ever do more with this
2862: if ($status eq 'correct_by_student') {return $self->CORRECT;}
2863: if ($status eq 'correct_by_override') {return $self->CORRECT_BY_OVERRIDE; }
2864: if ($status eq 'incorrect_attempted') {return $self->INCORRECT; }
2865: if ($status eq 'incorrect_by_override') {return $self->INCORRECT_BY_OVERRIDE; }
2866: if ($status eq 'excused') {return $self->EXCUSED; }
1.69 bowersj2 2867: if ($status eq 'ungraded_attempted') {return $self->ATTEMPTED; }
1.51 bowersj2 2868: return $self->NOT_ATTEMPTED;
2869: }
2870:
2871: =pod
2872:
2873: B<Composite Status>
2874:
2875: 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()):
2876:
2877: =over 4
2878:
1.70 bowersj2 2879: =item * B<NETWORK_FAILURE>: The network has failed and the information is not available.
1.51 bowersj2 2880:
1.70 bowersj2 2881: =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 2882:
1.70 bowersj2 2883: =item * B<CORRECT>: For any reason at all, the part is considered correct.
1.51 bowersj2 2884:
1.70 bowersj2 2885: =item * B<EXCUSED>: For any reason at all, the problem is excused.
1.51 bowersj2 2886:
1.70 bowersj2 2887: =item * B<PAST_DUE_NO_ANSWER>: The problem is past due, not considered correct, and no answer date is set.
1.54 bowersj2 2888:
1.70 bowersj2 2889: =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 2890:
1.70 bowersj2 2891: =item * B<ANSWER_OPEN>: The problem is past due, not correct, and the answer is now available.
1.51 bowersj2 2892:
1.70 bowersj2 2893: =item * B<OPEN_LATER>: The problem is not yet open.
1.51 bowersj2 2894:
1.70 bowersj2 2895: =item * B<TRIES_LEFT>: The problem is open, has been tried, is not correct, but there are tries left.
1.51 bowersj2 2896:
1.70 bowersj2 2897: =item * B<INCORRECT>: The problem is open, and all tries have been used without getting the correct answer.
1.51 bowersj2 2898:
1.70 bowersj2 2899: =item * B<OPEN>: The item is open and not yet tried.
1.51 bowersj2 2900:
1.70 bowersj2 2901: =item * B<ATTEMPTED>: The problem has been attempted.
1.69 bowersj2 2902:
1.51 bowersj2 2903: =back
2904:
2905: =cut
2906:
2907: sub TRIES_LEFT { return 10; }
2908:
2909: sub status {
2910: my $self = shift;
2911: my $part = shift;
2912: if (!defined($part)) { $part = "0"; }
2913: my $completionStatus = $self->getCompletionStatus($part);
2914: my $dateStatus = $self->getDateStatus($part);
2915:
2916: # What we have is a two-dimensional matrix with 4 entries on one
2917: # dimension and 5 entries on the other, which we want to colorize,
1.54 bowersj2 2918: # plus network failure and "no date data at all".
1.51 bowersj2 2919:
1.53 bowersj2 2920: if ($completionStatus == NETWORK_FAILURE) { return NETWORK_FAILURE; }
1.51 bowersj2 2921:
2922: # There are a few whole rows we can dispose of:
1.53 bowersj2 2923: if ($completionStatus == CORRECT ||
2924: $completionStatus == CORRECT_BY_OVERRIDE ) {
1.69 bowersj2 2925: return CORRECT;
2926: }
2927:
2928: if ($completionStatus == ATTEMPTED) {
2929: return ATTEMPTED;
1.53 bowersj2 2930: }
2931:
2932: # If it's EXCUSED, then return that no matter what
2933: if ($completionStatus == EXCUSED) {
2934: return EXCUSED;
1.51 bowersj2 2935: }
2936:
1.53 bowersj2 2937: if ($dateStatus == NOTHING_SET) {
2938: return NOTHING_SET;
1.51 bowersj2 2939: }
2940:
1.69 bowersj2 2941: # Now we're down to a 4 (incorrect, incorrect_override, not_attempted)
2942: # by 4 matrix (date statuses).
1.51 bowersj2 2943:
1.54 bowersj2 2944: if ($dateStatus == PAST_DUE_ANSWER_LATER ||
1.59 bowersj2 2945: $dateStatus == PAST_DUE_NO_ANSWER ) {
1.54 bowersj2 2946: return $dateStatus;
1.51 bowersj2 2947: }
2948:
1.53 bowersj2 2949: if ($dateStatus == ANSWER_OPEN) {
2950: return ANSWER_OPEN;
1.51 bowersj2 2951: }
2952:
2953: # Now: (incorrect, incorrect_override, not_attempted) x
2954: # (open_later), (open)
2955:
1.53 bowersj2 2956: if ($dateStatus == OPEN_LATER) {
2957: return OPEN_LATER;
1.51 bowersj2 2958: }
2959:
2960: # If it's WRONG...
1.53 bowersj2 2961: if ($completionStatus == INCORRECT || $completionStatus == INCORRECT_BY_OVERRIDE) {
1.51 bowersj2 2962: # and there are TRIES LEFT:
1.79 bowersj2 2963: if ($self->tries($part) < $self->maxtries($part) || !$self->maxtries($part)) {
1.53 bowersj2 2964: return TRIES_LEFT;
1.51 bowersj2 2965: }
1.53 bowersj2 2966: return INCORRECT; # otherwise, return orange; student can't fix this
1.51 bowersj2 2967: }
2968:
2969: # Otherwise, it's untried and open
1.53 bowersj2 2970: return OPEN;
1.51 bowersj2 2971: }
2972:
2973: =pod
2974:
2975: =head2 Resource/Nav Map Navigation
2976:
2977: =over 4
2978:
1.85 bowersj2 2979: =item * B<getNext>($alreadySeenHashRef): Retreive an array of the possible next resources after this one. Always returns an array, even in the one- or zero-element case. The "alreadySeenHashRef" is an optional parameter that can be passed in to the method. If $$alreadySeenHashRef{$res->id()} is true in that hash, getNext will not return it in the list. In other words, you can use it to suppress resources you've already seen in the getNext method directly.
2980:
2981: =item * B<getPrevious>($alreadySeenHashRef): Retreive an array of the possible previous resources from this one. Always returns an array, even in the one- or zero-element case. $alreadySeenHashRef is the same as in getNext.
1.51 bowersj2 2982:
2983: =cut
2984:
2985: sub getNext {
2986: my $self = shift;
2987: my $alreadySeenHash = shift;
2988: my @branches;
2989: my $to = $self->to();
1.85 bowersj2 2990: foreach my $branch ( split(/,/, $to) ) {
1.51 bowersj2 2991: my $choice = $self->{NAV_MAP}->getById($branch);
2992: my $next = $choice->goesto();
2993: $next = $self->{NAV_MAP}->getById($next);
2994:
1.61 bowersj2 2995: # Don't remember it if we've already seen it or if
1.66 bowersj2 2996: # the student doesn't have browse priviledges
2997: my $browsePriv = &Apache::lonnet::allowed('bre', $self->src);
1.51 bowersj2 2998: if (!defined($alreadySeenHash) ||
1.61 bowersj2 2999: !defined($alreadySeenHash->{$next->{ID}}) ||
1.66 bowersj2 3000: ($browsePriv ne '2' && $browsePriv ne 'F')) {
1.51 bowersj2 3001: push @branches, $next;
3002: }
1.85 bowersj2 3003: }
3004: return \@branches;
3005: }
3006:
3007: sub getPrevious {
3008: my $self = shift;
1.87 www 3009: my $alreadySeenHash = shift;
1.85 bowersj2 3010: my @branches;
3011: my $from = $self->from();
3012: foreach my $branch ( split /,/, $from) {
3013: my $choice = $self->{NAV_MAP}->getById($branch);
3014: my $prev = $choice->comesfrom();
3015: $prev = $self->{NAV_MAP}->getById($prev);
3016:
3017: # Skip it if we've already seen it or the user doesn't have
3018: # browse privs
3019: my $browsePriv = &Apache::lonnet::allowed('bre', $self->src);
3020: if (!defined($alreadySeenHash) ||
1.87 www 3021: !defined($alreadySeenHash->{$prev->{ID}}) ||
1.85 bowersj2 3022: ($browsePriv ne '2' && $browsePriv ne 'F')) {
1.87 www 3023: push @branches, $prev;
1.85 bowersj2 3024: }
1.51 bowersj2 3025: }
3026: return \@branches;
3027: }
3028:
3029: =pod
1.2 www 3030:
1.51 bowersj2 3031: =back
1.2 www 3032:
1.51 bowersj2 3033: =cut
1.2 www 3034:
1.51 bowersj2 3035: 1;
1.2 www 3036:
1.51 bowersj2 3037: __END__
1.2 www 3038:
3039:
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