Annotation of loncom/interface/lonhelper.pm, revision 1.124
1.1 bowersj2 1: # The LearningOnline Network with CAPA
2: # .helper XML handler to implement the LON-CAPA helper
3: #
1.124 ! albertel 4: # $Id: lonhelper.pm,v 1.123 2005/10/17 18:20:59 albertel Exp $
1.1 bowersj2 5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28:
1.3 bowersj2 29: =pod
30:
1.44 bowersj2 31: =head1 NAME
1.3 bowersj2 32:
1.44 bowersj2 33: lonhelper - implements helper framework
34:
35: =head1 SYNOPSIS
36:
37: lonhelper implements the helper framework for LON-CAPA, and provides
38: many generally useful components for that framework.
39:
40: Helpers are little programs which present the user with a sequence of
41: simple choices, instead of one monolithic multi-dimensional
42: choice. They are also referred to as "wizards", "druids", and
43: other potentially trademarked or semantically-loaded words.
44:
45: =head1 OVERVIEWX<lonhelper>
46:
47: Helpers are well-established UI widgets that users
1.3 bowersj2 48: feel comfortable with. It can take a complicated multidimensional problem the
49: user has and turn it into a series of bite-sized one-dimensional questions.
50:
51: For developers, helpers provide an easy way to bundle little bits of functionality
52: for the user, without having to write the tedious state-maintenence code.
53:
54: Helpers are defined as XML documents, placed in the /home/httpd/html/adm/helpers
55: directory and having the .helper file extension. For examples, see that directory.
56:
57: All classes are in the Apache::lonhelper namespace.
58:
1.44 bowersj2 59: =head1 lonhelper XML file formatX<lonhelper, XML file format>
1.3 bowersj2 60:
61: A helper consists of a top-level <helper> tag which contains a series of states.
62: Each state contains one or more state elements, which are what the user sees, like
63: messages, resource selections, or date queries.
64:
65: The helper tag is required to have one attribute, "title", which is the name
1.31 bowersj2 66: of the helper itself, such as "Parameter helper". The helper tag may optionally
67: have a "requiredpriv" attribute, specifying the priviledge a user must have
68: to use the helper, or get denied access. See loncom/auth/rolesplain.tab for
69: useful privs. Default is full access, which is often wrong!
1.3 bowersj2 70:
71: =head2 State tags
72:
73: State tags are required to have an attribute "name", which is the symbolic
1.7 bowersj2 74: name of the state and will not be directly seen by the user. The helper is
75: required to have one state named "START", which is the state the helper
1.5 bowersj2 76: will start with. By convention, this state should clearly describe what
1.3 bowersj2 77: the helper will do for the user, and may also include the first information
78: entry the user needs to do for the helper.
79:
80: State tags are also required to have an attribute "title", which is the
81: human name of the state, and will be displayed as the header on top of
82: the screen for the user.
83:
84: =head2 Example Helper Skeleton
85:
86: An example of the tags so far:
87:
88: <helper title="Example Helper">
89: <state name="START" title="Demonstrating the Example Helper">
90: <!-- notice this is the START state the wizard requires -->
91: </state>
92: <state name="GET_NAME" title="Enter Student Name">
93: </state>
94: </helper>
95:
96: Of course this does nothing. In order for the wizard to do something, it is
97: necessary to put actual elements into the wizard. Documentation for each
98: of these elements follows.
99:
1.44 bowersj2 100: =head1 Creating a Helper With Code, Not XML
1.13 bowersj2 101:
102: In some situations, such as the printing wizard (see lonprintout.pm),
103: writing the helper in XML would be too complicated, because of scope
104: issues or the fact that the code actually outweighs the XML. It is
105: possible to create a helper via code, though it is a little odd.
106:
107: Creating a helper via code is more like issuing commands to create
108: a helper then normal code writing. For instance, elements will automatically
109: be added to the last state created, so it's important to create the
110: states in the correct order.
111:
112: First, create a new helper:
113:
114: use Apache::lonhelper;
115:
116: my $helper = Apache::lonhelper::new->("Helper Title");
117:
118: Next you'll need to manually add states to the helper:
119:
120: Apache::lonhelper::state->new("STATE_NAME", "State's Human Title");
121:
122: You don't need to save a reference to it because all elements up until
123: the next state creation will automatically be added to this state.
124:
125: Elements are created by populating the $paramHash in
126: Apache::lonhelper::paramhash. To prevent namespace issues, retrieve
127: a reference to that has with getParamHash:
128:
129: my $paramHash = Apache::lonhelper::getParamHash();
130:
131: You will need to do this for each state you create.
132:
133: Populate the $paramHash with the parameters for the element you wish
134: to add next; the easiest way to find out what those entries are is
135: to read the code. Some common ones are 'variable' to record the variable
136: to store the results in, and NEXTSTATE to record a next state transition.
137:
138: Then create your element:
139:
140: $paramHash->{MESSAGETEXT} = "This is a message.";
141: Apache::lonhelper::message->new();
142:
143: The creation will take the $paramHash and bless it into a
144: Apache::lonhelper::message object. To create the next element, you need
145: to get a reference to the new, empty $paramHash:
146:
147: $paramHash = Apache::lonhelper::getParamHash();
148:
149: and you can repeat creating elements that way. You can add states
150: and elements as needed.
151:
152: See lonprintout.pm, subroutine printHelper for an example of this, where
153: we dynamically add some states to prevent security problems, for instance.
154:
155: Normally the machinery in the XML format is sufficient; dynamically
156: adding states can easily be done by wrapping the state in a <condition>
157: tag. This should only be used when the code dominates the XML content,
158: the code is so complicated that it is difficult to get access to
1.44 bowersj2 159: all of the information you need because of scoping issues, or would-be <exec> or
160: <eval> blocks using the {DATA} mechanism results in hard-to-read
161: and -maintain code. (See course.initialization.helper for a borderline
162: case.)
1.13 bowersj2 163:
164: It is possible to do some of the work with an XML fragment parsed by
1.17 bowersj2 165: lonxml; again, see lonprintout.pm for an example. In that case it is
166: imperative that you call B<Apache::lonhelper::registerHelperTags()>
167: before parsing XML fragments and B<Apache::lonhelper::unregisterHelperTags()>
168: when you are done. See lonprintout.pm for examples of this usage in the
169: printHelper subroutine.
1.13 bowersj2 170:
1.57 albertel 171: =head2 Localization
172:
173: The helper framework tries to handle as much localization as
174: possible. The text is always run through
175: Apache::lonlocal::normalize_string, so be sure to run the keys through
176: that function for maximum usefulness and robustness.
177:
1.3 bowersj2 178: =cut
179:
1.1 bowersj2 180: package Apache::lonhelper;
1.2 bowersj2 181: use Apache::Constants qw(:common);
182: use Apache::File;
1.3 bowersj2 183: use Apache::lonxml;
1.57 albertel 184: use Apache::lonlocal;
1.100 albertel 185: use Apache::lonnet;
1.2 bowersj2 186:
1.7 bowersj2 187: # Register all the tags with the helper, so the helper can
188: # push and pop them
189:
190: my @helperTags;
191:
192: sub register {
193: my ($namespace, @tags) = @_;
194:
195: for my $tag (@tags) {
196: push @helperTags, [$namespace, $tag];
197: }
198: }
199:
1.2 bowersj2 200: BEGIN {
1.7 bowersj2 201: Apache::lonxml::register('Apache::lonhelper',
202: ('helper'));
203: register('Apache::lonhelper', ('state'));
1.2 bowersj2 204: }
205:
1.7 bowersj2 206: # Since all helpers are only three levels deep (helper tag, state tag,
1.3 bowersj2 207: # substate type), it's easier and more readble to explicitly track
208: # those three things directly, rather then futz with the tag stack
209: # every time.
210: my $helper;
211: my $state;
212: my $substate;
1.4 bowersj2 213: # To collect parameters, the contents of the subtags are collected
214: # into this paramHash, then passed to the element object when the
215: # end of the element tag is located.
216: my $paramHash;
1.2 bowersj2 217:
1.25 bowersj2 218: # Note from Jeremy 5-8-2003: It is *vital* that the real handler be called
219: # as a subroutine from the handler, or very mysterious things might happen.
220: # I don't know exactly why, but it seems that the scope where the Apache
221: # server enters the perl handler is treated differently from the rest of
222: # the handler. This also seems to manifest itself in the debugger as entering
223: # the perl handler in seemingly random places (sometimes it starts in the
224: # compiling phase, sometimes in the handler execution phase where it runs
225: # the code and stepping into the "1;" the module ends with goes into the handler,
226: # sometimes starting directly with the handler); I think the cause is related.
227: # In the debugger, this means that breakpoints are ignored until you step into
228: # a function and get out of what must be a "faked up scope" in the Apache->
229: # mod_perl connection. In this code, it was manifesting itself in the existence
1.65 www 230: # of two separate file-scoped $helper variables, one set to the value of the
1.25 bowersj2 231: # helper in the helper constructor, and one referenced by the handler on the
1.44 bowersj2 232: # "$helper->process()" line. Using the debugger, one could actually
233: # see the two different $helper variables, as hashes at completely
234: # different addresses. The second was therefore never set, and was still
1.25 bowersj2 235: # undefined when I tried to call process on it.
236: # By pushing the "real handler" down into the "real scope", everybody except the
237: # actual handler function directly below this comment gets the same $helper and
238: # everybody is happy.
239: # The upshot of all of this is that for safety when a handler is using
240: # file-scoped variables in LON-CAPA, the handler should be pushed down one
241: # call level, as I do here, to ensure that the top-level handler function does
242: # not get a different file scope from the rest of the code.
243: sub handler {
244: my $r = shift;
245: return real_handler($r);
246: }
247:
1.13 bowersj2 248: # For debugging purposes, one can send a second parameter into this
249: # function, the 'uri' of the helper you wish to have rendered, and
250: # call this from other handlers.
1.25 bowersj2 251: sub real_handler {
1.3 bowersj2 252: my $r = shift;
1.13 bowersj2 253: my $uri = shift;
254: if (!defined($uri)) { $uri = $r->uri(); }
1.100 albertel 255: $env{'request.uri'} = $uri;
1.13 bowersj2 256: my $filename = '/home/httpd/html' . $uri;
1.2 bowersj2 257: my $fh = Apache::File->new($filename);
258: my $file;
1.3 bowersj2 259: read $fh, $file, 100000000;
260:
1.27 bowersj2 261:
1.3 bowersj2 262: # Send header, don't cache this page
1.100 albertel 263: if ($env{'browser.mathml'}) {
1.70 sakharuk 264: &Apache::loncommon::content_type($r,'text/xml');
265: } else {
266: &Apache::loncommon::content_type($r,'text/html');
267: }
268: $r->send_http_header;
269: return OK if $r->header_only;
1.3 bowersj2 270: $r->rflush();
1.2 bowersj2 271:
1.3 bowersj2 272: # Discard result, we just want the objects that get created by the
273: # xml parsing
274: &Apache::lonxml::xmlparse($r, 'helper', $file);
1.2 bowersj2 275:
1.31 bowersj2 276: my $allowed = $helper->allowedCheck();
277: if (!$allowed) {
1.100 albertel 278: $env{'user.error.msg'} = $env{'request.uri'}.':'.$helper->{REQUIRED_PRIV}.
1.31 bowersj2 279: ":0:0:Permission denied to access this helper.";
280: return HTTP_NOT_ACCEPTABLE;
281: }
282:
1.13 bowersj2 283: $helper->process();
284:
1.3 bowersj2 285: $r->print($helper->display());
1.31 bowersj2 286: return OK;
1.2 bowersj2 287: }
288:
1.13 bowersj2 289: sub registerHelperTags {
290: for my $tagList (@helperTags) {
291: Apache::lonxml::register($tagList->[0], $tagList->[1]);
292: }
293: }
294:
295: sub unregisterHelperTags {
296: for my $tagList (@helperTags) {
297: Apache::lonxml::deregister($tagList->[0], $tagList->[1]);
298: }
299: }
300:
1.2 bowersj2 301: sub start_helper {
302: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
303:
304: if ($target ne 'helper') {
305: return '';
306: }
1.7 bowersj2 307:
1.13 bowersj2 308: registerHelperTags();
309:
1.31 bowersj2 310: Apache::lonhelper::helper->new($token->[2]{'title'}, $token->[2]{'requiredpriv'});
1.4 bowersj2 311: return '';
1.2 bowersj2 312: }
313:
314: sub end_helper {
315: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
316:
1.3 bowersj2 317: if ($target ne 'helper') {
318: return '';
319: }
1.7 bowersj2 320:
1.13 bowersj2 321: unregisterHelperTags();
1.7 bowersj2 322:
1.4 bowersj2 323: return '';
1.2 bowersj2 324: }
1.1 bowersj2 325:
1.3 bowersj2 326: sub start_state {
327: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
328:
329: if ($target ne 'helper') {
330: return '';
331: }
332:
1.13 bowersj2 333: Apache::lonhelper::state->new($token->[2]{'name'},
334: $token->[2]{'title'});
1.3 bowersj2 335: return '';
336: }
337:
1.13 bowersj2 338: # Use this to get the param hash from other files.
339: sub getParamHash {
340: return $paramHash;
341: }
342:
343: # Use this to get the helper, if implementing elements in other files
344: # (like lonprintout.pm)
345: sub getHelper {
346: return $helper;
347: }
348:
1.3 bowersj2 349: # don't need this, so ignore it
350: sub end_state {
351: return '';
352: }
353:
1.1 bowersj2 354: 1;
355:
1.3 bowersj2 356: package Apache::lonhelper::helper;
357:
358: use Digest::MD5 qw(md5_hex);
1.57 albertel 359: use HTML::Entities();
1.3 bowersj2 360: use Apache::loncommon;
361: use Apache::File;
1.57 albertel 362: use Apache::lonlocal;
1.100 albertel 363: use Apache::lonnet;
1.3 bowersj2 364:
365: sub new {
366: my $proto = shift;
367: my $class = ref($proto) || $proto;
368: my $self = {};
369:
370: $self->{TITLE} = shift;
1.31 bowersj2 371: $self->{REQUIRED_PRIV} = shift;
1.3 bowersj2 372:
373: # If there is a state from the previous form, use that. If there is no
374: # state, use the start state parameter.
1.100 albertel 375: if (defined $env{"form.CURRENT_STATE"})
1.3 bowersj2 376: {
1.100 albertel 377: $self->{STATE} = $env{"form.CURRENT_STATE"};
1.3 bowersj2 378: }
379: else
380: {
381: $self->{STATE} = "START";
382: }
383:
1.100 albertel 384: $self->{TOKEN} = $env{'form.TOKEN'};
1.3 bowersj2 385: # If a token was passed, we load that in. Otherwise, we need to create a
386: # new storage file
387: # Tried to use standard Tie'd hashes, but you can't seem to take a
388: # reference to a tied hash and write to it. I'd call that a wart.
389: if ($self->{TOKEN}) {
390: # Validate the token before trusting it
391: if ($self->{TOKEN} !~ /^[a-f0-9]{32}$/) {
392: # Not legit. Return nothing and let all hell break loose.
393: # User shouldn't be doing that!
394: return undef;
395: }
396:
397: # Get the hash.
398: $self->{FILENAME} = $Apache::lonnet::tmpdir . md5_hex($self->{TOKEN}); # Note the token is not the literal file
399:
400: my $file = Apache::File->new($self->{FILENAME});
401: my $contents = <$file>;
1.5 bowersj2 402:
403: # Now load in the contents
404: for my $value (split (/&/, $contents)) {
405: my ($name, $value) = split(/=/, $value);
406: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg;
407: $self->{VARS}->{$name} = $value;
408: }
409:
1.3 bowersj2 410: $file->close();
411: } else {
412: # Only valid if we're just starting.
413: if ($self->{STATE} ne 'START') {
414: return undef;
415: }
416: # Must create the storage
1.100 albertel 417: $self->{TOKEN} = md5_hex($env{'user.name'} . $env{'user.domain'} .
1.3 bowersj2 418: time() . rand());
419: $self->{FILENAME} = $Apache::lonnet::tmpdir . md5_hex($self->{TOKEN});
420: }
421:
422: # OK, we now have our persistent storage.
423:
1.100 albertel 424: if (defined $env{"form.RETURN_PAGE"})
1.3 bowersj2 425: {
1.100 albertel 426: $self->{RETURN_PAGE} = $env{"form.RETURN_PAGE"};
1.3 bowersj2 427: }
428: else
429: {
430: $self->{RETURN_PAGE} = $ENV{REFERER};
431: }
432:
433: $self->{STATES} = {};
434: $self->{DONE} = 0;
435:
1.9 bowersj2 436: # Used by various helpers for various things; see lonparm.helper
437: # for an example.
438: $self->{DATA} = {};
439:
1.13 bowersj2 440: $helper = $self;
441:
442: # Establish the $paramHash
443: $paramHash = {};
444:
1.3 bowersj2 445: bless($self, $class);
446: return $self;
447: }
448:
449: # Private function; returns a string to construct the hidden fields
450: # necessary to have the helper track state.
451: sub _saveVars {
452: my $self = shift;
453: my $result = "";
454: $result .= '<input type="hidden" name="CURRENT_STATE" value="' .
1.67 albertel 455: HTML::Entities::encode($self->{STATE},'<>&"') . "\" />\n";
1.3 bowersj2 456: $result .= '<input type="hidden" name="TOKEN" value="' .
457: $self->{TOKEN} . "\" />\n";
458: $result .= '<input type="hidden" name="RETURN_PAGE" value="' .
1.67 albertel 459: HTML::Entities::encode($self->{RETURN_PAGE},'<>&"') . "\" />\n";
1.3 bowersj2 460:
461: return $result;
462: }
463:
464: # Private function: Create the querystring-like representation of the stored
465: # data to write to disk.
466: sub _varsInFile {
467: my $self = shift;
468: my @vars = ();
469: for my $key (keys %{$self->{VARS}}) {
470: push @vars, &Apache::lonnet::escape($key) . '=' .
471: &Apache::lonnet::escape($self->{VARS}->{$key});
472: }
473: return join ('&', @vars);
474: }
475:
1.5 bowersj2 476: # Use this to declare variables.
477: # FIXME: Document this
478: sub declareVar {
479: my $self = shift;
480: my $var = shift;
481:
482: if (!defined($self->{VARS}->{$var})) {
483: $self->{VARS}->{$var} = '';
484: }
485:
486: my $envname = 'form.' . $var . '.forminput';
1.100 albertel 487: if (defined($env{$envname})) {
488: if (ref($env{$envname})) {
489: $self->{VARS}->{$var} = join('|||', @{$env{$envname}});
1.28 bowersj2 490: } else {
1.100 albertel 491: $self->{VARS}->{$var} = $env{$envname};
1.28 bowersj2 492: }
1.5 bowersj2 493: }
494: }
495:
1.31 bowersj2 496: sub allowedCheck {
497: my $self = shift;
498:
499: if (!defined($self->{REQUIRED_PRIV})) {
500: return 1;
501: }
502:
1.100 albertel 503: return Apache::lonnet::allowed($self->{REQUIRED_PRIV}, $env{'request.course.id'});
1.31 bowersj2 504: }
505:
1.3 bowersj2 506: sub changeState {
507: my $self = shift;
508: $self->{STATE} = shift;
509: }
510:
511: sub registerState {
512: my $self = shift;
513: my $state = shift;
514:
515: my $stateName = $state->name();
516: $self->{STATES}{$stateName} = $state;
517: }
518:
1.13 bowersj2 519: sub process {
1.3 bowersj2 520: my $self = shift;
521:
522: # Phase 1: Post processing for state of previous screen (which is actually
523: # the "current state" in terms of the helper variables), if it wasn't the
524: # beginning state.
1.100 albertel 525: if ($self->{STATE} ne "START" || $env{"form.SUBMIT"} eq &mt("Next ->")) {
1.3 bowersj2 526: my $prevState = $self->{STATES}{$self->{STATE}};
1.13 bowersj2 527: $prevState->postprocess();
1.3 bowersj2 528: }
529:
530: # Note, to handle errors in a state's input that a user must correct,
531: # do not transition in the postprocess, and force the user to correct
532: # the error.
533:
534: # Phase 2: Preprocess current state
535: my $startState = $self->{STATE};
1.17 bowersj2 536: my $state = $self->{STATES}->{$startState};
1.3 bowersj2 537:
1.13 bowersj2 538: # For debugging, print something here to determine if you're going
539: # to an undefined state.
1.3 bowersj2 540: if (!defined($state)) {
1.13 bowersj2 541: return;
1.3 bowersj2 542: }
543: $state->preprocess();
544:
545: # Phase 3: While the current state is different from the previous state,
546: # keep processing.
1.17 bowersj2 547: while ( $startState ne $self->{STATE} &&
548: defined($self->{STATES}->{$self->{STATE}}) )
1.3 bowersj2 549: {
550: $startState = $self->{STATE};
1.17 bowersj2 551: $state = $self->{STATES}->{$startState};
1.3 bowersj2 552: $state->preprocess();
553: }
554:
1.13 bowersj2 555: return;
556: }
557:
558: # 1: Do the post processing for the previous state.
559: # 2: Do the preprocessing for the current state.
560: # 3: Check to see if state changed, if so, postprocess current and move to next.
561: # Repeat until state stays stable.
562: # 4: Render the current state to the screen as an HTML page.
563: sub display {
564: my $self = shift;
565:
566: my $state = $self->{STATES}{$self->{STATE}};
567:
568: my $result = "";
569:
1.17 bowersj2 570: if (!defined($state)) {
571: $result = "<font color='#ff0000'>Error: state '$state' not defined!</font>";
572: return $result;
573: }
574:
1.3 bowersj2 575: # Phase 4: Display.
1.96 albertel 576: my $html=&Apache::lonxml::xmlbegin();
1.68 sakharuk 577: my $stateTitle=&mt($state->title());
1.57 albertel 578: my $helperTitle = &mt($self->{TITLE});
579: my $bodytag = &Apache::loncommon::bodytag($helperTitle,'','');
580: my $previous = HTML::Entities::encode(&mt("<- Previous"), '<>&"');
581: my $next = HTML::Entities::encode(&mt("Next ->"), '<>&"');
582: # FIXME: This should be parameterized, not concatenated - Jeremy
583: my $loncapaHelper = &mt("LON-CAPA Helper:");
1.3 bowersj2 584:
585: $result .= <<HEADER;
1.96 albertel 586: $html
1.3 bowersj2 587: <head>
1.57 albertel 588: <title>$loncapaHelper: $helperTitle</title>
1.3 bowersj2 589: </head>
590: $bodytag
591: HEADER
1.28 bowersj2 592: if (!$state->overrideForm()) { $result.="<form name='helpform' method='POST'>"; }
1.3 bowersj2 593: $result .= <<HEADER;
1.31 bowersj2 594: <table border="0" width='100%'><tr><td>
1.3 bowersj2 595: <h2><i>$stateTitle</i></h2>
596: HEADER
597:
1.31 bowersj2 598: $result .= "<table cellpadding='10' width='100%'><tr><td rowspan='2' valign='top'>";
1.30 bowersj2 599:
1.3 bowersj2 600: if (!$state->overrideForm()) {
601: $result .= $self->_saveVars();
602: }
1.30 bowersj2 603: $result .= $state->render();
604:
1.31 bowersj2 605: $result .= "</td><td valign='top' align='right'>";
1.3 bowersj2 606:
1.30 bowersj2 607: # Warning: Copy and pasted from below, because it's too much trouble to
608: # turn this into a subroutine
1.3 bowersj2 609: if (!$state->overrideForm()) {
610: if ($self->{STATE} ne $self->{START_STATE}) {
611: #$result .= '<input name="SUBMIT" type="submit" value="<- Previous" /> ';
612: }
613: if ($self->{DONE}) {
614: my $returnPage = $self->{RETURN_PAGE};
1.57 albertel 615: $result .= "<a href=\"$returnPage\">" . &mt("End Helper") . "</a>";
1.3 bowersj2 616: }
617: else {
1.30 bowersj2 618: $result .= '<nobr><input name="back" type="button" ';
1.57 albertel 619: $result .= 'value="' . $previous . '" onclick="history.go(-1)" /> ';
620: $result .= '<input name="SUBMIT" type="submit" value="' . $next . '" /></nobr>';
1.30 bowersj2 621: }
622: }
623:
1.31 bowersj2 624: $result .= "</td></tr><tr><td valign='bottom' align='right'>";
1.30 bowersj2 625:
626: # Warning: Copy and pasted from above, because it's too much trouble to
627: # turn this into a subroutine
628: if (!$state->overrideForm()) {
629: if ($self->{STATE} ne $self->{START_STATE}) {
630: #$result .= '<input name="SUBMIT" type="submit" value="<- Previous" /> ';
631: }
632: if ($self->{DONE}) {
633: my $returnPage = $self->{RETURN_PAGE};
1.57 albertel 634: $result .= "<a href=\"$returnPage\">" . &mt('End Helper') . "</a>";
1.30 bowersj2 635: }
636: else {
637: $result .= '<nobr><input name="back" type="button" ';
1.57 albertel 638: $result .= 'value="' . $previous . '" onclick="history.go(-1)" /> ';
639: $result .= '<input name="SUBMIT" type="submit" value="' . $next . '" /></nobr>';
1.3 bowersj2 640: }
641: }
642:
1.13 bowersj2 643: #foreach my $key (keys %{$self->{VARS}}) {
644: # $result .= "|$key| -> " . $self->{VARS}->{$key} . "<br />";
645: #}
1.5 bowersj2 646:
1.30 bowersj2 647: $result .= "</td></tr></table>";
648:
1.3 bowersj2 649: $result .= <<FOOTER;
650: </td>
651: </tr>
652: </table>
653: </form>
654: </body>
655: </html>
656: FOOTER
657:
658: # Handle writing out the vars to the file
659: my $file = Apache::File->new('>'.$self->{FILENAME});
1.33 bowersj2 660: print $file $self->_varsInFile();
1.3 bowersj2 661:
662: return $result;
663: }
664:
665: 1;
666:
667: package Apache::lonhelper::state;
668:
669: # States bundle things together and are responsible for compositing the
1.4 bowersj2 670: # various elements together. It is not generally necessary for users to
671: # use the state object directly, so it is not perldoc'ed.
672:
673: # Basically, all the states do is pass calls to the elements and aggregate
674: # the results.
1.3 bowersj2 675:
676: sub new {
677: my $proto = shift;
678: my $class = ref($proto) || $proto;
679: my $self = {};
680:
681: $self->{NAME} = shift;
682: $self->{TITLE} = shift;
683: $self->{ELEMENTS} = [];
684:
685: bless($self, $class);
686:
687: $helper->registerState($self);
688:
1.13 bowersj2 689: $state = $self;
690:
1.3 bowersj2 691: return $self;
692: }
693:
694: sub name {
695: my $self = shift;
696: return $self->{NAME};
697: }
698:
699: sub title {
700: my $self = shift;
701: return $self->{TITLE};
702: }
703:
1.4 bowersj2 704: sub preprocess {
705: my $self = shift;
706: for my $element (@{$self->{ELEMENTS}}) {
707: $element->preprocess();
708: }
709: }
710:
1.6 bowersj2 711: # FIXME: Document that all postprocesses must return a true value or
712: # the state transition will be overridden
1.4 bowersj2 713: sub postprocess {
714: my $self = shift;
1.6 bowersj2 715:
716: # Save the state so we can roll it back if we need to.
717: my $originalState = $helper->{STATE};
718: my $everythingSuccessful = 1;
719:
1.4 bowersj2 720: for my $element (@{$self->{ELEMENTS}}) {
1.6 bowersj2 721: my $result = $element->postprocess();
722: if (!$result) { $everythingSuccessful = 0; }
723: }
724:
725: # If not all the postprocesses were successful, override
726: # any state transitions that may have occurred. It is the
727: # responsibility of the states to make sure they have
728: # error handling in that case.
729: if (!$everythingSuccessful) {
730: $helper->{STATE} = $originalState;
1.4 bowersj2 731: }
732: }
733:
1.13 bowersj2 734: # Override the form if any element wants to.
735: # two elements overriding the form will make a mess, but that should
736: # be considered helper author error ;-)
1.4 bowersj2 737: sub overrideForm {
1.13 bowersj2 738: my $self = shift;
739: for my $element (@{$self->{ELEMENTS}}) {
740: if ($element->overrideForm()) {
741: return 1;
742: }
743: }
1.4 bowersj2 744: return 0;
745: }
746:
747: sub addElement {
748: my $self = shift;
749: my $element = shift;
750:
751: push @{$self->{ELEMENTS}}, $element;
752: }
753:
754: sub render {
755: my $self = shift;
756: my @results = ();
757:
758: for my $element (@{$self->{ELEMENTS}}) {
759: push @results, $element->render();
760: }
1.28 bowersj2 761:
1.4 bowersj2 762: return join("\n", @results);
763: }
764:
765: 1;
766:
767: package Apache::lonhelper::element;
768: # Support code for elements
769:
770: =pod
771:
1.44 bowersj2 772: =head1 Element Base Class
1.4 bowersj2 773:
1.28 bowersj2 774: The Apache::lonhelper::element base class provides support for elements
775: and defines some generally useful tags for use in elements.
1.4 bowersj2 776:
1.44 bowersj2 777: =head2 finalcode tagX<finalcode>
1.25 bowersj2 778:
779: Each element can contain a "finalcode" tag that, when the special FINAL
780: helper state is used, will be executed, surrounded by "sub { my $helper = shift;"
781: and "}". It is expected to return a string describing what it did, which
782: may be an empty string. See course initialization helper for an example. This is
783: generally intended for helpers like the course initialization helper, which consist
784: of several panels, each of which is performing some sort of bite-sized functionality.
785:
1.44 bowersj2 786: =head2 defaultvalue tagX<defaultvalue>
1.25 bowersj2 787:
788: Each element that accepts user input can contain a "defaultvalue" tag that,
789: when surrounded by "sub { my $helper = shift; my $state = shift; " and "}",
790: will form a subroutine that when called will provide a default value for
791: the element. How this value is interpreted by the element is specific to
792: the element itself, and possibly the settings the element has (such as
793: multichoice vs. single choice for <choices> tags).
794:
795: This is also intended for things like the course initialization wizard, where the
796: user is setting various parameters. By correctly grabbing current settings
797: and including them into the helper, it allows the user to come back to the
798: helper later and re-execute it, without needing to worry about overwriting
799: some setting accidentally.
800:
801: Again, see the course initialization helper for examples.
802:
1.44 bowersj2 803: =head2 validator tagX<validator>
1.38 bowersj2 804:
805: Some elements that accepts user input can contain a "validator" tag that,
806: when surrounded by "sub { my $helper = shift; my $state = shift; my $element = shift; my $val = shift "
807: and "}", where "$val" is the value the user entered, will form a subroutine
808: that when called will verify whether the given input is valid or not. If it
809: is valid, the routine will return a false value. If invalid, the routine
810: will return an error message to be displayed for the user.
811:
812: Consult the documentation for each element to see whether it supports this
813: tag.
814:
1.44 bowersj2 815: =head2 getValue methodX<getValue (helper elements)>
1.31 bowersj2 816:
817: If the element stores the name of the variable in a 'variable' member, which
818: the provided ones all do, you can retreive the value of the variable by calling
819: this method.
820:
1.4 bowersj2 821: =cut
822:
1.5 bowersj2 823: BEGIN {
1.7 bowersj2 824: &Apache::lonhelper::register('Apache::lonhelper::element',
1.25 bowersj2 825: ('nextstate', 'finalcode',
1.38 bowersj2 826: 'defaultvalue', 'validator'));
1.5 bowersj2 827: }
828:
1.4 bowersj2 829: # Because we use the param hash, this is often a sufficent
830: # constructor
831: sub new {
832: my $proto = shift;
833: my $class = ref($proto) || $proto;
834: my $self = $paramHash;
835: bless($self, $class);
836:
837: $self->{PARAMS} = $paramHash;
838: $self->{STATE} = $state;
839: $state->addElement($self);
840:
841: # Ensure param hash is not reused
842: $paramHash = {};
843:
844: return $self;
845: }
846:
1.5 bowersj2 847: sub start_nextstate {
848: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
849:
850: if ($target ne 'helper') {
851: return '';
852: }
853:
854: $paramHash->{NEXTSTATE} = &Apache::lonxml::get_all_text('/nextstate',
855: $parser);
856: return '';
857: }
858:
859: sub end_nextstate { return ''; }
860:
1.25 bowersj2 861: sub start_finalcode {
862: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
863:
864: if ($target ne 'helper') {
865: return '';
866: }
867:
868: $paramHash->{FINAL_CODE} = &Apache::lonxml::get_all_text('/finalcode',
869: $parser);
870: return '';
871: }
872:
873: sub end_finalcode { return ''; }
874:
875: sub start_defaultvalue {
876: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
877:
878: if ($target ne 'helper') {
879: return '';
880: }
881:
882: $paramHash->{DEFAULT_VALUE} = &Apache::lonxml::get_all_text('/defaultvalue',
883: $parser);
884: $paramHash->{DEFAULT_VALUE} = 'sub { my $helper = shift; my $state = shift;' .
885: $paramHash->{DEFAULT_VALUE} . '}';
886: return '';
887: }
888:
889: sub end_defaultvalue { return ''; }
890:
1.57 albertel 891: # Validators may need to take language specifications
1.38 bowersj2 892: sub start_validator {
893: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
894:
895: if ($target ne 'helper') {
896: return '';
897: }
898:
899: $paramHash->{VALIDATOR} = &Apache::lonxml::get_all_text('/validator',
900: $parser);
901: $paramHash->{VALIDATOR} = 'sub { my $helper = shift; my $state = shift; my $element = shift; my $val = shift;' .
902: $paramHash->{VALIDATOR} . '}';
903: return '';
904: }
905:
906: sub end_validator { return ''; }
907:
1.4 bowersj2 908: sub preprocess {
909: return 1;
910: }
911:
912: sub postprocess {
913: return 1;
914: }
915:
916: sub render {
917: return '';
918: }
919:
1.13 bowersj2 920: sub overrideForm {
921: return 0;
922: }
923:
1.31 bowersj2 924: sub getValue {
925: my $self = shift;
926: return $helper->{VARS}->{$self->{'variable'}};
927: }
928:
1.4 bowersj2 929: 1;
930:
931: package Apache::lonhelper::message;
932:
933: =pod
934:
1.48 bowersj2 935: =head1 Elements
936:
937: =head2 Element: messageX<message, helper element>
1.4 bowersj2 938:
1.44 bowersj2 939: Message elements display their contents, and
940: transition directly to the state in the <nextstate> attribute. Example:
1.4 bowersj2 941:
1.44 bowersj2 942: <message nextstate='GET_NAME'>
943: This is the <b>message</b> the user will see,
944: <i>HTML allowed</i>.
1.4 bowersj2 945: </message>
946:
1.44 bowersj2 947: This will display the HTML message and transition to the 'nextstate' if
1.7 bowersj2 948: given. The HTML will be directly inserted into the helper, so if you don't
1.44 bowersj2 949: want text to run together, you'll need to manually wrap the message text
1.4 bowersj2 950: in <p> tags, or whatever is appropriate for your HTML.
951:
1.5 bowersj2 952: Message tags do not add in whitespace, so if you want it, you'll need to add
953: it into states. This is done so you can inline some elements, such as
954: the <date> element, right between two messages, giving the appearence that
955: the <date> element appears inline. (Note the elements can not be embedded
956: within each other.)
957:
1.4 bowersj2 958: This is also a good template for creating your own new states, as it has
959: very little code beyond the state template.
960:
1.57 albertel 961: =head3 Localization
962:
963: The contents of the message tag will be run through the
964: normalize_string function and that will be used as a call to &mt.
965:
1.4 bowersj2 966: =cut
967:
968: no strict;
969: @ISA = ("Apache::lonhelper::element");
970: use strict;
1.57 albertel 971: use Apache::lonlocal;
1.4 bowersj2 972:
973: BEGIN {
1.7 bowersj2 974: &Apache::lonhelper::register('Apache::lonhelper::message',
1.10 bowersj2 975: ('message'));
1.3 bowersj2 976: }
977:
1.5 bowersj2 978: sub new {
979: my $ref = Apache::lonhelper::element->new();
980: bless($ref);
981: }
1.4 bowersj2 982:
983: # CONSTRUCTION: Construct the message element from the XML
984: sub start_message {
985: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
986:
987: if ($target ne 'helper') {
988: return '';
989: }
1.10 bowersj2 990:
1.69 sakharuk 991: $paramHash->{MESSAGE_TEXT} = &mtn(&Apache::lonxml::get_all_text('/message',
992: $parser));
1.10 bowersj2 993:
994: if (defined($token->[2]{'nextstate'})) {
995: $paramHash->{NEXTSTATE} = $token->[2]{'nextstate'};
996: }
1.4 bowersj2 997: return '';
1.3 bowersj2 998: }
999:
1.10 bowersj2 1000: sub end_message {
1.4 bowersj2 1001: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1002:
1003: if ($target ne 'helper') {
1004: return '';
1005: }
1.10 bowersj2 1006: Apache::lonhelper::message->new();
1007: return '';
1.5 bowersj2 1008: }
1009:
1010: sub render {
1011: my $self = shift;
1012:
1.57 albertel 1013: return &mtn($self->{MESSAGE_TEXT});
1.5 bowersj2 1014: }
1015: # If a NEXTSTATE was given, switch to it
1016: sub postprocess {
1017: my $self = shift;
1018: if (defined($self->{NEXTSTATE})) {
1019: $helper->changeState($self->{NEXTSTATE});
1020: }
1.6 bowersj2 1021:
1022: return 1;
1.5 bowersj2 1023: }
1024: 1;
1025:
1026: package Apache::lonhelper::choices;
1027:
1028: =pod
1029:
1.44 bowersj2 1030: =head2 Element: choicesX<choices, helper element>
1.5 bowersj2 1031:
1032: Choice states provide a single choice to the user as a text selection box.
1033: A "choice" is two pieces of text, one which will be displayed to the user
1034: (the "human" value), and one which will be passed back to the program
1035: (the "computer" value). For instance, a human may choose from a list of
1036: resources on disk by title, while your program wants the file name.
1037:
1038: <choices> takes an attribute "variable" to control which helper variable
1039: the result is stored in.
1040:
1041: <choices> takes an attribute "multichoice" which, if set to a true
1042: value, will allow the user to select multiple choices.
1043:
1.26 bowersj2 1044: <choices> takes an attribute "allowempty" which, if set to a true
1045: value, will allow the user to select none of the choices without raising
1046: an error message.
1047:
1.44 bowersj2 1048: =head3 SUB-TAGS
1.5 bowersj2 1049:
1.44 bowersj2 1050: <choices> can have the following subtags:X<choice, helper tag>
1.5 bowersj2 1051:
1052: =over 4
1053:
1054: =item * <nextstate>state_name</nextstate>: If given, this will cause the
1.44 bowersj2 1055: choice element to transition to the given state after executing.
1056: This will override the <nextstate> passed to <choices> (if any).
1.5 bowersj2 1057:
1058: =item * <choice />: If the choices are static,
1059: this element will allow you to specify them. Each choice
1060: contains attribute, "computer", as described above. The
1061: content of the tag will be used as the human label.
1062: For example,
1063: <choice computer='234-12-7312'>Bobby McDormik</choice>.
1064:
1.44 bowersj2 1065: <choice> can take a parameter "eval", which if set to
1066: a true value, will cause the contents of the tag to be
1067: evaluated as it would be in an <eval> tag; see <eval> tag
1068: below.
1.13 bowersj2 1069:
1.5 bowersj2 1070: <choice> may optionally contain a 'nextstate' attribute, which
1.44 bowersj2 1071: will be the state transistioned to if the choice is made, if
1072: the choice is not multichoice. This will override the nextstate
1073: passed to the parent C<choices> tag.
1.5 bowersj2 1074:
1075: =back
1076:
1077: To create the choices programmatically, either wrap the choices in
1078: <condition> tags (prefered), or use an <exec> block inside the <choice>
1079: tag. Store the choices in $state->{CHOICES}, which is a list of list
1080: references, where each list has three strings. The first is the human
1081: name, the second is the computer name. and the third is the option
1082: next state. For example:
1083:
1084: <exec>
1085: for (my $i = 65; $i < 65 + 26; $i++) {
1086: push @{$state->{CHOICES}}, [chr($i), $i, 'next'];
1087: }
1088: </exec>
1089:
1090: This will allow the user to select from the letters A-Z (in ASCII), while
1091: passing the ASCII value back into the helper variables, and the state
1092: will in all cases transition to 'next'.
1093:
1094: You can mix and match methods of creating choices, as long as you always
1095: "push" onto the choice list, rather then wiping it out. (You can even
1096: remove choices programmatically, but that would probably be bad form.)
1097:
1.44 bowersj2 1098: =head3 defaultvalue support
1.25 bowersj2 1099:
1100: Choices supports default values both in multichoice and single choice mode.
1101: In single choice mode, have the defaultvalue tag's function return the
1102: computer value of the box you want checked. If the function returns a value
1103: that does not correspond to any of the choices, the default behavior of selecting
1104: the first choice will be preserved.
1105:
1106: For multichoice, return a string with the computer values you want checked,
1107: delimited by triple pipes. Note this matches how the result of the <choices>
1108: tag is stored in the {VARS} hash.
1109:
1.5 bowersj2 1110: =cut
1111:
1112: no strict;
1113: @ISA = ("Apache::lonhelper::element");
1114: use strict;
1.57 albertel 1115: use Apache::lonlocal;
1.100 albertel 1116: use Apache::lonnet;
1.5 bowersj2 1117:
1118: BEGIN {
1.7 bowersj2 1119: &Apache::lonhelper::register('Apache::lonhelper::choices',
1.5 bowersj2 1120: ('choice', 'choices'));
1121: }
1122:
1123: sub new {
1124: my $ref = Apache::lonhelper::element->new();
1125: bless($ref);
1126: }
1127:
1128: # CONSTRUCTION: Construct the message element from the XML
1129: sub start_choices {
1130: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1131:
1132: if ($target ne 'helper') {
1133: return '';
1134: }
1135:
1136: # Need to initialize the choices list, so everything can assume it exists
1.24 sakharuk 1137: $paramHash->{'variable'} = $token->[2]{'variable'} if (!defined($paramHash->{'variable'}));
1.5 bowersj2 1138: $helper->declareVar($paramHash->{'variable'});
1139: $paramHash->{'multichoice'} = $token->[2]{'multichoice'};
1.26 bowersj2 1140: $paramHash->{'allowempty'} = $token->[2]{'allowempty'};
1.5 bowersj2 1141: $paramHash->{CHOICES} = [];
1142: return '';
1143: }
1144:
1145: sub end_choices {
1146: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1147:
1148: if ($target ne 'helper') {
1149: return '';
1150: }
1151: Apache::lonhelper::choices->new();
1152: return '';
1153: }
1154:
1155: sub start_choice {
1156: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1157:
1158: if ($target ne 'helper') {
1159: return '';
1160: }
1161:
1162: my $computer = $token->[2]{'computer'};
1.69 sakharuk 1163: my $human = &mt(&Apache::lonxml::get_all_text('/choice',
1164: $parser));
1.5 bowersj2 1165: my $nextstate = $token->[2]{'nextstate'};
1.13 bowersj2 1166: my $evalFlag = $token->[2]{'eval'};
1.94 albertel 1167: push @{$paramHash->{CHOICES}}, [&mtn($human), $computer, $nextstate,
1.13 bowersj2 1168: $evalFlag];
1.5 bowersj2 1169: return '';
1170: }
1171:
1172: sub end_choice {
1173: return '';
1174: }
1175:
1.87 matthew 1176: {
1177: # used to generate unique id attributes for <input> tags.
1178: # internal use only.
1179: my $id = 0;
1180: sub new_id { return $id++; }
1181: }
1182:
1.5 bowersj2 1183: sub render {
1184: my $self = shift;
1185: my $var = $self->{'variable'};
1186: my $buttons = '';
1187: my $result = '';
1188:
1189: if ($self->{'multichoice'}) {
1.6 bowersj2 1190: $result .= <<SCRIPT;
1.112 albertel 1191: <script type="text/javascript">
1192: // <!--
1.18 bowersj2 1193: function checkall(value, checkName) {
1.15 bowersj2 1194: for (i=0; i<document.forms.helpform.elements.length; i++) {
1.18 bowersj2 1195: ele = document.forms.helpform.elements[i];
1196: if (ele.name == checkName + '.forminput') {
1197: document.forms.helpform.elements[i].checked=value;
1198: }
1.5 bowersj2 1199: }
1200: }
1.112 albertel 1201: // -->
1.5 bowersj2 1202: </script>
1203: SCRIPT
1.25 bowersj2 1204: }
1205:
1206: # Only print "select all" and "unselect all" if there are five or
1207: # more choices; fewer then that and it looks silly.
1208: if ($self->{'multichoice'} && scalar(@{$self->{CHOICES}}) > 4) {
1.68 sakharuk 1209: my %lt=&Apache::lonlocal::texthash(
1210: 'sa' => "Select All",
1211: 'ua' => "Unselect All");
1.5 bowersj2 1212: $buttons = <<BUTTONS;
1213: <br />
1.68 sakharuk 1214: <input type="button" onclick="checkall(true, '$var')" value="$lt{'sa'}" />
1215: <input type="button" onclick="checkall(false, '$var')" value="$lt{'ua'}" />
1.6 bowersj2 1216: <br />
1.5 bowersj2 1217: BUTTONS
1218: }
1219:
1.16 bowersj2 1220: if (defined $self->{ERROR_MSG}) {
1.6 bowersj2 1221: $result .= '<br /><font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br />';
1.5 bowersj2 1222: }
1223:
1224: $result .= $buttons;
1.6 bowersj2 1225:
1.5 bowersj2 1226: $result .= "<table>\n\n";
1227:
1.25 bowersj2 1228: my %checkedChoices;
1229: my $checkedChoicesFunc;
1230:
1231: if (defined($self->{DEFAULT_VALUE})) {
1232: $checkedChoicesFunc = eval ($self->{DEFAULT_VALUE});
1233: die 'Error in default value code for variable ' .
1.34 bowersj2 1234: $self->{'variable'} . ', Perl said: ' . $@ if $@;
1.25 bowersj2 1235: } else {
1236: $checkedChoicesFunc = sub { return ''; };
1237: }
1238:
1239: # Process which choices should be checked.
1240: if ($self->{'multichoice'}) {
1241: for my $selectedChoice (split(/\|\|\|/, (&$checkedChoicesFunc($helper, $self)))) {
1242: $checkedChoices{$selectedChoice} = 1;
1243: }
1244: } else {
1245: # single choice
1246: my $selectedChoice = &$checkedChoicesFunc($helper, $self);
1247:
1248: my $foundChoice = 0;
1249:
1250: # check that the choice is in the list of choices.
1251: for my $choice (@{$self->{CHOICES}}) {
1252: if ($choice->[1] eq $selectedChoice) {
1253: $checkedChoices{$choice->[1]} = 1;
1254: $foundChoice = 1;
1255: }
1256: }
1257:
1258: # If we couldn't find the choice, pick the first one
1259: if (!$foundChoice) {
1260: $checkedChoices{$self->{CHOICES}->[0]->[1]} = 1;
1261: }
1262: }
1263:
1.5 bowersj2 1264: my $type = "radio";
1265: if ($self->{'multichoice'}) { $type = 'checkbox'; }
1266: foreach my $choice (@{$self->{CHOICES}}) {
1.87 matthew 1267: my $id = &new_id();
1.5 bowersj2 1268: $result .= "<tr>\n<td width='20'> </td>\n";
1269: $result .= "<td valign='top'><input type='$type' name='$var.forminput'"
1.111 albertel 1270: . " value='" .
1.89 foxr 1271: HTML::Entities::encode($choice->[1],"<>&\"'")
1.5 bowersj2 1272: . "'";
1.25 bowersj2 1273: if ($checkedChoices{$choice->[1]}) {
1.111 albertel 1274: $result .= " checked='checked' ";
1.5 bowersj2 1275: }
1.111 albertel 1276: $result .= qq{id="id$id"};
1.13 bowersj2 1277: my $choiceLabel = $choice->[0];
1278: if ($choice->[4]) { # if we need to evaluate this choice
1279: $choiceLabel = "sub { my $helper = shift; my $state = shift;" .
1280: $choiceLabel . "}";
1281: $choiceLabel = eval($choiceLabel);
1282: $choiceLabel = &$choiceLabel($helper, $self);
1283: }
1.111 albertel 1284: $result .= "/></td><td> ".qq{<label for="id$id">}.
1.94 albertel 1285: $choiceLabel. "</label></td></tr>\n";
1.5 bowersj2 1286: }
1287: $result .= "</table>\n\n\n";
1288: $result .= $buttons;
1289:
1290: return $result;
1291: }
1292:
1293: # If a NEXTSTATE was given or a nextstate for this choice was
1294: # given, switch to it
1295: sub postprocess {
1296: my $self = shift;
1.100 albertel 1297: my $chosenValue = $env{'form.' . $self->{'variable'} . '.forminput'};
1.5 bowersj2 1298:
1.26 bowersj2 1299: if (!defined($chosenValue) && !$self->{'allowempty'}) {
1.59 bowersj2 1300: $self->{ERROR_MSG} =
1301: &mt("You must choose one or more choices to continue.");
1.6 bowersj2 1302: return 0;
1303: }
1304:
1.28 bowersj2 1305: if (ref($chosenValue)) {
1306: $helper->{VARS}->{$self->{'variable'}} = join('|||', @$chosenValue);
1.42 bowersj2 1307: }
1308:
1309: if (defined($self->{NEXTSTATE})) {
1310: $helper->changeState($self->{NEXTSTATE});
1311: }
1312:
1313: foreach my $choice (@{$self->{CHOICES}}) {
1314: if ($choice->[1] eq $chosenValue) {
1315: if (defined($choice->[2])) {
1316: $helper->changeState($choice->[2]);
1317: }
1318: }
1319: }
1320: return 1;
1321: }
1322: 1;
1323:
1324: package Apache::lonhelper::dropdown;
1325:
1326: =pod
1327:
1.44 bowersj2 1328: =head2 Element: dropdownX<dropdown, helper tag>
1.42 bowersj2 1329:
1330: A drop-down provides a drop-down box instead of a radio button
1331: box. Because most people do not know how to use a multi-select
1332: drop-down box, that option is not allowed. Otherwise, the arguments
1333: are the same as "choices", except "allowempty" is also meaningless.
1334:
1335: <dropdown> takes an attribute "variable" to control which helper variable
1336: the result is stored in.
1337:
1.44 bowersj2 1338: =head3 SUB-TAGS
1.42 bowersj2 1339:
1340: <choice>, which acts just as it does in the "choices" element.
1341:
1342: =cut
1343:
1.57 albertel 1344: # This really ought to be a sibling class to "choice" which is itself
1345: # a child of some abstract class.... *shrug*
1346:
1.42 bowersj2 1347: no strict;
1348: @ISA = ("Apache::lonhelper::element");
1349: use strict;
1.57 albertel 1350: use Apache::lonlocal;
1.100 albertel 1351: use Apache::lonnet;
1.42 bowersj2 1352:
1353: BEGIN {
1354: &Apache::lonhelper::register('Apache::lonhelper::dropdown',
1355: ('dropdown'));
1356: }
1357:
1358: sub new {
1359: my $ref = Apache::lonhelper::element->new();
1360: bless($ref);
1361: }
1362:
1363: # CONSTRUCTION: Construct the message element from the XML
1364: sub start_dropdown {
1365: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1366:
1367: if ($target ne 'helper') {
1368: return '';
1369: }
1370:
1371: # Need to initialize the choices list, so everything can assume it exists
1372: $paramHash->{'variable'} = $token->[2]{'variable'} if (!defined($paramHash->{'variable'}));
1373: $helper->declareVar($paramHash->{'variable'});
1374: $paramHash->{CHOICES} = [];
1375: return '';
1376: }
1377:
1378: sub end_dropdown {
1379: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1380:
1381: if ($target ne 'helper') {
1382: return '';
1383: }
1384: Apache::lonhelper::dropdown->new();
1385: return '';
1386: }
1387:
1388: sub render {
1389: my $self = shift;
1390: my $var = $self->{'variable'};
1391: my $result = '';
1392:
1393: if (defined $self->{ERROR_MSG}) {
1394: $result .= '<br /><font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br />';
1395: }
1396:
1397: my %checkedChoices;
1398: my $checkedChoicesFunc;
1399:
1400: if (defined($self->{DEFAULT_VALUE})) {
1401: $checkedChoicesFunc = eval ($self->{DEFAULT_VALUE});
1402: die 'Error in default value code for variable ' .
1403: $self->{'variable'} . ', Perl said: ' . $@ if $@;
1404: } else {
1405: $checkedChoicesFunc = sub { return ''; };
1406: }
1407:
1408: # single choice
1409: my $selectedChoice = &$checkedChoicesFunc($helper, $self);
1410:
1411: my $foundChoice = 0;
1412:
1413: # check that the choice is in the list of choices.
1414: for my $choice (@{$self->{CHOICES}}) {
1415: if ($choice->[1] eq $selectedChoice) {
1416: $checkedChoices{$choice->[1]} = 1;
1417: $foundChoice = 1;
1418: }
1419: }
1420:
1421: # If we couldn't find the choice, pick the first one
1422: if (!$foundChoice) {
1423: $checkedChoices{$self->{CHOICES}->[0]->[1]} = 1;
1424: }
1425:
1426: $result .= "<select name='${var}.forminput'>\n";
1427: foreach my $choice (@{$self->{CHOICES}}) {
1428: $result .= "<option value='" .
1.89 foxr 1429: HTML::Entities::encode($choice->[1],"<>&\"'")
1.42 bowersj2 1430: . "'";
1431: if ($checkedChoices{$choice->[1]}) {
1.111 albertel 1432: $result .= " selected='selected' ";
1.42 bowersj2 1433: }
1434: my $choiceLabel = $choice->[0];
1435: if ($choice->[4]) { # if we need to evaluate this choice
1436: $choiceLabel = "sub { my $helper = shift; my $state = shift;" .
1437: $choiceLabel . "}";
1438: $choiceLabel = eval($choiceLabel);
1439: $choiceLabel = &$choiceLabel($helper, $self);
1440: }
1.112 albertel 1441: $result .= ">" . &mtn($choiceLabel) . "</option>\n";
1.42 bowersj2 1442: }
1.43 bowersj2 1443: $result .= "</select>\n";
1.42 bowersj2 1444:
1445: return $result;
1446: }
1447:
1448: # If a NEXTSTATE was given or a nextstate for this choice was
1449: # given, switch to it
1450: sub postprocess {
1451: my $self = shift;
1.100 albertel 1452: my $chosenValue = $env{'form.' . $self->{'variable'} . '.forminput'};
1.42 bowersj2 1453:
1454: if (!defined($chosenValue) && !$self->{'allowempty'}) {
1455: $self->{ERROR_MSG} = "You must choose one or more choices to" .
1456: " continue.";
1457: return 0;
1.6 bowersj2 1458: }
1459:
1.5 bowersj2 1460: if (defined($self->{NEXTSTATE})) {
1461: $helper->changeState($self->{NEXTSTATE});
1462: }
1463:
1464: foreach my $choice (@{$self->{CHOICES}}) {
1465: if ($choice->[1] eq $chosenValue) {
1466: if (defined($choice->[2])) {
1467: $helper->changeState($choice->[2]);
1468: }
1469: }
1470: }
1.6 bowersj2 1471: return 1;
1.5 bowersj2 1472: }
1473: 1;
1474:
1475: package Apache::lonhelper::date;
1476:
1477: =pod
1478:
1.44 bowersj2 1479: =head2 Element: dateX<date, helper element>
1.5 bowersj2 1480:
1481: Date elements allow the selection of a date with a drop down list.
1482:
1483: Date elements can take two attributes:
1484:
1485: =over 4
1486:
1487: =item * B<variable>: The name of the variable to store the chosen
1488: date in. Required.
1489:
1490: =item * B<hoursminutes>: If a true value, the date will show hours
1491: and minutes, as well as month/day/year. If false or missing,
1492: the date will only show the month, day, and year.
1493:
1494: =back
1495:
1496: Date elements contain only an option <nextstate> tag to determine
1497: the next state.
1498:
1499: Example:
1500:
1501: <date variable="DUE_DATE" hoursminutes="1">
1502: <nextstate>choose_why</nextstate>
1503: </date>
1504:
1505: =cut
1506:
1507: no strict;
1508: @ISA = ("Apache::lonhelper::element");
1509: use strict;
1.57 albertel 1510: use Apache::lonlocal; # A localization nightmare
1.100 albertel 1511: use Apache::lonnet;
1.5 bowersj2 1512: use Time::localtime;
1513:
1514: BEGIN {
1.7 bowersj2 1515: &Apache::lonhelper::register('Apache::lonhelper::date',
1.5 bowersj2 1516: ('date'));
1517: }
1518:
1519: # Don't need to override the "new" from element
1520: sub new {
1521: my $ref = Apache::lonhelper::element->new();
1522: bless($ref);
1523: }
1524:
1525: my @months = ("January", "February", "March", "April", "May", "June", "July",
1526: "August", "September", "October", "November", "December");
1527:
1528: # CONSTRUCTION: Construct the message element from the XML
1529: sub start_date {
1530: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1531:
1532: if ($target ne 'helper') {
1533: return '';
1534: }
1535:
1536: $paramHash->{'variable'} = $token->[2]{'variable'};
1537: $helper->declareVar($paramHash->{'variable'});
1538: $paramHash->{'hoursminutes'} = $token->[2]{'hoursminutes'};
1.118 albertel 1539: $paramHash->{'anytime'} = $token->[2]{'anytime'};
1.5 bowersj2 1540: }
1541:
1542: sub end_date {
1543: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1544:
1545: if ($target ne 'helper') {
1546: return '';
1547: }
1548: Apache::lonhelper::date->new();
1549: return '';
1550: }
1551:
1552: sub render {
1553: my $self = shift;
1554: my $result = "";
1555: my $var = $self->{'variable'};
1556:
1557: my $date;
1.118 albertel 1558:
1559: my $time=time;
1.119 albertel 1560: my ($anytime,$onclick);
1.118 albertel 1561:
1562: if (defined($self->{DEFAULT_VALUE})) {
1563: my $valueFunc = eval($self->{DEFAULT_VALUE});
1564: die('Error in default value code for variable ' .
1565: $self->{'variable'} . ', Perl said: ' . $@) if $@;
1566: $time = &$valueFunc($helper, $self);
1567: if (lc($time) eq 'anytime') { $time=time; $anytime=1; }
1568: }
1.119 albertel 1569: if ($anytime) {
1570: $onclick = "onclick=\"javascript:updateCheck(this.form,'${var}anytime',false)\"";
1571: }
1.5 bowersj2 1572: # Default date: The current hour.
1.118 albertel 1573: $date = localtime($time);
1.5 bowersj2 1574: $date->min(0);
1575:
1576: if (defined $self->{ERROR_MSG}) {
1577: $result .= '<font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br /><br />';
1578: }
1579:
1580: # Month
1581: my $i;
1.119 albertel 1582: $result .= "<select $onclick name='${var}month'>\n";
1.5 bowersj2 1583: for ($i = 0; $i < 12; $i++) {
1584: if ($i == $date->mon) {
1.111 albertel 1585: $result .= "<option value='$i' selected='selected'>";
1.5 bowersj2 1586: } else {
1587: $result .= "<option value='$i'>";
1588: }
1.57 albertel 1589: $result .= &mt($months[$i]) . "</option>\n";
1.5 bowersj2 1590: }
1591: $result .= "</select>\n";
1592:
1593: # Day
1.119 albertel 1594: $result .= "<select $onclick name='${var}day'>\n";
1.5 bowersj2 1595: for ($i = 1; $i < 32; $i++) {
1596: if ($i == $date->mday) {
1.111 albertel 1597: $result .= '<option selected="selected">';
1.5 bowersj2 1598: } else {
1599: $result .= '<option>';
1600: }
1601: $result .= "$i</option>\n";
1602: }
1603: $result .= "</select>,\n";
1604:
1605: # Year
1.119 albertel 1606: $result .= "<select $onclick name='${var}year'>\n";
1.5 bowersj2 1607: for ($i = 2000; $i < 2030; $i++) { # update this after 64-bit dates
1608: if ($date->year + 1900 == $i) {
1.111 albertel 1609: $result .= "<option selected='selected'>";
1.5 bowersj2 1610: } else {
1611: $result .= "<option>";
1612: }
1613: $result .= "$i</option>\n";
1614: }
1615: $result .= "</select>,\n";
1616:
1617: # Display Hours and Minutes if they are called for
1618: if ($self->{'hoursminutes'}) {
1.59 bowersj2 1619: # This needs parameterization for times.
1620: my $am = &mt('a.m.');
1621: my $pm = &mt('p.m.');
1.5 bowersj2 1622: # Build hour
1.119 albertel 1623: $result .= "<select $onclick name='${var}hour'>\n";
1.111 albertel 1624: $result .= "<option " . ($date->hour == 0 ? 'selected="selected" ':'') .
1.59 bowersj2 1625: " value='0'>" . &mt('midnight') . "</option>\n";
1.5 bowersj2 1626: for ($i = 1; $i < 12; $i++) {
1627: if ($date->hour == $i) {
1.111 albertel 1628: $result .= "<option selected='selected' value='$i'>$i $am</option>\n";
1.5 bowersj2 1629: } else {
1.59 bowersj2 1630: $result .= "<option value='$i'>$i $am</option>\n";
1.5 bowersj2 1631: }
1632: }
1.111 albertel 1633: $result .= "<option " . ($date->hour == 12 ? 'selected="selected" ':'') .
1.59 bowersj2 1634: " value='12'>" . &mt('noon') . "</option>\n";
1.5 bowersj2 1635: for ($i = 13; $i < 24; $i++) {
1636: my $printedHour = $i - 12;
1637: if ($date->hour == $i) {
1.111 albertel 1638: $result .= "<option selected='selected' value='$i'>$printedHour $pm</option>\n";
1.5 bowersj2 1639: } else {
1.59 bowersj2 1640: $result .= "<option value='$i'>$printedHour $pm</option>\n";
1.5 bowersj2 1641: }
1642: }
1643:
1644: $result .= "</select> :\n";
1645:
1.119 albertel 1646: $result .= "<select $onclick name='${var}minute'>\n";
1.120 albertel 1647: my $selected=0;
1648: for my $i ((0,15,30,45,59,undef,0..59)) {
1.5 bowersj2 1649: my $printedMinute = $i;
1.117 albertel 1650: if (defined($i) && $i < 10) {
1.5 bowersj2 1651: $printedMinute = "0" . $printedMinute;
1652: }
1.120 albertel 1653: if (!$selected && $date->min == $i) {
1.111 albertel 1654: $result .= "<option selected='selected'>";
1.120 albertel 1655: $selected=1;
1.5 bowersj2 1656: } else {
1657: $result .= "<option>";
1658: }
1659: $result .= "$printedMinute</option>\n";
1660: }
1661: $result .= "</select>\n";
1662: }
1.118 albertel 1663: if ($self->{'anytime'}) {
1.121 albertel 1664: $result.=(<<CHECK);
1.119 albertel 1665: <script type="text/javascript">
1666: // <!--
1667: function updateCheck(form,name,value) {
1668: var checkbox=form[name];
1669: checkbox.checked = value;
1670: }
1671: // -->
1672: </script>
1673: CHECK
1.118 albertel 1674: $result.=" or <label><input type='checkbox' ";
1675: if ($anytime) {
1676: $result.=' checked="checked" '
1677: }
1678: $result.="name='${var}anytime'/>".&mt('Anytime').'</label>'
1679: }
1.5 bowersj2 1680: return $result;
1681:
1682: }
1683: # If a NEXTSTATE was given, switch to it
1684: sub postprocess {
1685: my $self = shift;
1686: my $var = $self->{'variable'};
1.118 albertel 1687: if ($env{'form.' . $var . 'anytime'}) {
1688: $helper->{VARS}->{$var} = undef;
1689: } else {
1690: my $month = $env{'form.' . $var . 'month'};
1691: my $day = $env{'form.' . $var . 'day'};
1692: my $year = $env{'form.' . $var . 'year'};
1693: my $min = 0;
1694: my $hour = 0;
1695: if ($self->{'hoursminutes'}) {
1696: $min = $env{'form.' . $var . 'minute'};
1697: $hour = $env{'form.' . $var . 'hour'};
1698: }
1699:
1700: my $chosenDate;
1701: eval {$chosenDate = Time::Local::timelocal(0, $min, $hour, $day, $month, $year);};
1702: my $error = $@;
1703:
1704: # Check to make sure that the date was not automatically co-erced into a
1705: # valid date, as we want to flag that as an error
1706: # This happens for "Feb. 31", for instance, which is coerced to March 2 or
1707: # 3, depending on if it's a leap year
1708: my $checkDate = localtime($chosenDate);
1709:
1710: if ($error || $checkDate->mon != $month || $checkDate->mday != $day ||
1711: $checkDate->year + 1900 != $year) {
1712: unless (Apache::lonlocal::current_language()== ~/^en/) {
1713: $self->{ERROR_MSG} = &mt("Invalid date entry");
1714: return 0;
1715: }
1716: # LOCALIZATION FIXME: Needs to be parameterized
1717: $self->{ERROR_MSG} = "Can't use " . $months[$month] . " $day, $year as a "
1718: . "date because it doesn't exist. Please enter a valid date.";
1.5 bowersj2 1719:
1.57 albertel 1720: return 0;
1721: }
1.118 albertel 1722: $helper->{VARS}->{$var} = $chosenDate;
1.5 bowersj2 1723: }
1724:
1725: if (defined($self->{NEXTSTATE})) {
1726: $helper->changeState($self->{NEXTSTATE});
1727: }
1.6 bowersj2 1728:
1729: return 1;
1.5 bowersj2 1730: }
1731: 1;
1732:
1733: package Apache::lonhelper::resource;
1734:
1735: =pod
1736:
1.44 bowersj2 1737: =head2 Element: resourceX<resource, helper element>
1.5 bowersj2 1738:
1739: <resource> elements allow the user to select one or multiple resources
1740: from the current course. You can filter out which resources they can view,
1741: and filter out which resources they can select. The course will always
1742: be displayed fully expanded, because of the difficulty of maintaining
1743: selections across folder openings and closings. If this is fixed, then
1744: the user can manipulate the folders.
1745:
1746: <resource> takes the standard variable attribute to control what helper
1.44 bowersj2 1747: variable stores the results. It also takes a "multichoice"X<multichoice> attribute,
1.17 bowersj2 1748: which controls whether the user can select more then one resource. The
1749: "toponly" attribute controls whether the resource display shows just the
1750: resources in that sequence, or recurses into all sub-sequences, defaulting
1.29 bowersj2 1751: to false. The "suppressEmptySequences" attribute reflects the
1752: suppressEmptySequences argument to the render routine, which will cause
1753: folders that have all of their contained resources filtered out to also
1.46 bowersj2 1754: be filtered out. The 'addstatus' attribute, if true, will add the icon
1.95 albertel 1755: and long status display columns to the display. The 'addparts'
1756: attribute will add in a part selector beside problems that have more
1757: than 1 part.
1.5 bowersj2 1758:
1.44 bowersj2 1759: =head3 SUB-TAGS
1.5 bowersj2 1760:
1761: =over 4
1762:
1.44 bowersj2 1763: =item * <filterfunc>X<filterfunc>: If you want to filter what resources are displayed
1.5 bowersj2 1764: to the user, use a filter func. The <filterfunc> tag should contain
1765: Perl code that when wrapped with "sub { my $res = shift; " and "}" is
1766: a function that returns true if the resource should be displayed,
1767: and false if it should be skipped. $res is a resource object.
1768: (See Apache::lonnavmaps documentation for information about the
1769: resource object.)
1770:
1.44 bowersj2 1771: =item * <choicefunc>X<choicefunc>: Same as <filterfunc>, except that controls whether
1.5 bowersj2 1772: the given resource can be chosen. (It is almost always a good idea to
1773: show the user the folders, for instance, but you do not always want to
1774: let the user select them.)
1775:
1776: =item * <nextstate>: Standard nextstate behavior.
1777:
1.44 bowersj2 1778: =item * <valuefunc>X<valuefunc>: This function controls what is returned by the resource
1.5 bowersj2 1779: when the user selects it. Like filterfunc and choicefunc, it should be
1780: a function fragment that when wrapped by "sub { my $res = shift; " and
1781: "}" returns a string representing what you want to have as the value. By
1782: default, the value will be the resource ID of the object ($res->{ID}).
1783:
1.44 bowersj2 1784: =item * <mapurl>X<mapurl>: If the URL of a map is given here, only that map
1.48 bowersj2 1785: will be displayed, instead of the whole course. If the attribute
1786: "evaluate" is given and is true, the contents of the mapurl will be
1787: evaluated with "sub { my $helper = shift; my $state = shift;" and
1788: "}", with the return value used as the mapurl.
1.13 bowersj2 1789:
1.5 bowersj2 1790: =back
1791:
1792: =cut
1793:
1794: no strict;
1795: @ISA = ("Apache::lonhelper::element");
1796: use strict;
1.100 albertel 1797: use Apache::lonnet;
1.5 bowersj2 1798:
1799: BEGIN {
1.7 bowersj2 1800: &Apache::lonhelper::register('Apache::lonhelper::resource',
1.5 bowersj2 1801: ('resource', 'filterfunc',
1.13 bowersj2 1802: 'choicefunc', 'valuefunc',
1.90 foxr 1803: 'mapurl','option'));
1.5 bowersj2 1804: }
1805:
1806: sub new {
1807: my $ref = Apache::lonhelper::element->new();
1808: bless($ref);
1809: }
1810:
1811: # CONSTRUCTION: Construct the message element from the XML
1812: sub start_resource {
1813: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1814:
1815: if ($target ne 'helper') {
1816: return '';
1817: }
1818:
1819: $paramHash->{'variable'} = $token->[2]{'variable'};
1820: $helper->declareVar($paramHash->{'variable'});
1.14 bowersj2 1821: $paramHash->{'multichoice'} = $token->[2]{'multichoice'};
1.29 bowersj2 1822: $paramHash->{'suppressEmptySequences'} = $token->[2]{'suppressEmptySequences'};
1.17 bowersj2 1823: $paramHash->{'toponly'} = $token->[2]{'toponly'};
1.46 bowersj2 1824: $paramHash->{'addstatus'} = $token->[2]{'addstatus'};
1.95 albertel 1825: $paramHash->{'addparts'} = $token->[2]{'addparts'};
1826: if ($paramHash->{'addparts'}) {
1827: $helper->declareVar($paramHash->{'variable'}.'_part');
1828: }
1.66 albertel 1829: $paramHash->{'closeallpages'} = $token->[2]{'closeallpages'};
1.5 bowersj2 1830: return '';
1831: }
1832:
1833: sub end_resource {
1834: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1835:
1836: if ($target ne 'helper') {
1837: return '';
1838: }
1839: if (!defined($paramHash->{FILTER_FUNC})) {
1840: $paramHash->{FILTER_FUNC} = sub {return 1;};
1841: }
1842: if (!defined($paramHash->{CHOICE_FUNC})) {
1843: $paramHash->{CHOICE_FUNC} = sub {return 1;};
1844: }
1845: if (!defined($paramHash->{VALUE_FUNC})) {
1846: $paramHash->{VALUE_FUNC} = sub {my $res = shift; return $res->{ID}; };
1847: }
1848: Apache::lonhelper::resource->new();
1.4 bowersj2 1849: return '';
1850: }
1851:
1.5 bowersj2 1852: sub start_filterfunc {
1853: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1854:
1855: if ($target ne 'helper') {
1856: return '';
1857: }
1858:
1859: my $contents = Apache::lonxml::get_all_text('/filterfunc',
1860: $parser);
1861: $contents = 'sub { my $res = shift; ' . $contents . '}';
1862: $paramHash->{FILTER_FUNC} = eval $contents;
1863: }
1864:
1865: sub end_filterfunc { return ''; }
1866:
1867: sub start_choicefunc {
1868: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1869:
1870: if ($target ne 'helper') {
1871: return '';
1872: }
1873:
1874: my $contents = Apache::lonxml::get_all_text('/choicefunc',
1875: $parser);
1876: $contents = 'sub { my $res = shift; ' . $contents . '}';
1877: $paramHash->{CHOICE_FUNC} = eval $contents;
1878: }
1879:
1880: sub end_choicefunc { return ''; }
1881:
1882: sub start_valuefunc {
1883: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1884:
1885: if ($target ne 'helper') {
1886: return '';
1887: }
1888:
1889: my $contents = Apache::lonxml::get_all_text('/valuefunc',
1890: $parser);
1891: $contents = 'sub { my $res = shift; ' . $contents . '}';
1892: $paramHash->{VALUE_FUNC} = eval $contents;
1893: }
1894:
1895: sub end_valuefunc { return ''; }
1896:
1.13 bowersj2 1897: sub start_mapurl {
1898: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1899:
1900: if ($target ne 'helper') {
1901: return '';
1902: }
1903:
1904: my $contents = Apache::lonxml::get_all_text('/mapurl',
1905: $parser);
1.48 bowersj2 1906: $paramHash->{EVAL_MAP_URL} = $token->[2]{'evaluate'};
1.14 bowersj2 1907: $paramHash->{MAP_URL} = $contents;
1.13 bowersj2 1908: }
1909:
1910: sub end_mapurl { return ''; }
1911:
1.90 foxr 1912:
1913: sub start_option {
1914: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1915: if (!defined($paramHash->{OPTION_TEXTS})) {
1916: $paramHash->{OPTION_TEXTS} = [ ];
1917: $paramHash->{OPTION_VARS} = [ ];
1.91 foxr 1918:
1.90 foxr 1919: }
1.91 foxr 1920: # OPTION_TEXTS is a list of the text attribute
1921: # values used to create column headings.
1922: # OPTION_VARS is a list of the variable names, used to create the checkbox
1923: # inputs.
1.90 foxr 1924: # We're ok with empty elements. as place holders
1925: # Although the 'variable' element should really exist.
1.91 foxr 1926: #
1927:
1.90 foxr 1928: my $option_texts = $paramHash->{OPTION_TEXTS};
1929: my $option_vars = $paramHash->{OPTION_VARS};
1930: push(@$option_texts, $token->[2]{'text'});
1931: push(@$option_vars, $token->[2]{'variable'});
1932:
1.91 foxr 1933: # Need to create and declare the option variables as well to make them
1934: # persistent.
1935: #
1936: my $varname = $token->[2]{'variable'};
1937: $helper->declareVar($varname);
1938:
1939:
1.90 foxr 1940: return '';
1941: }
1942:
1943: sub end_option {
1944: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1945: return '';
1946: }
1947:
1.5 bowersj2 1948: # A note, in case I don't get to this before I leave.
1949: # If someone complains about the "Back" button returning them
1950: # to the previous folder state, instead of returning them to
1951: # the previous helper state, the *correct* answer is for the helper
1952: # to keep track of how many times the user has manipulated the folders,
1953: # and feed that to the history.go() call in the helper rendering routines.
1954: # If done correctly, the helper itself can keep track of how many times
1955: # it renders the same states, so it doesn't go in just this state, and
1956: # you can lean on the browser back button to make sure it all chains
1957: # correctly.
1958: # Right now, though, I'm just forcing all folders open.
1959:
1960: sub render {
1961: my $self = shift;
1962: my $result = "";
1963: my $var = $self->{'variable'};
1964: my $curVal = $helper->{VARS}->{$var};
1965:
1.15 bowersj2 1966: my $buttons = '';
1967:
1968: if ($self->{'multichoice'}) {
1969: $result = <<SCRIPT;
1.112 albertel 1970: <script type="text/javascript">
1971: // <!--
1.18 bowersj2 1972: function checkall(value, checkName) {
1.15 bowersj2 1973: for (i=0; i<document.forms.helpform.elements.length; i++) {
1974: ele = document.forms.helpform.elements[i];
1.18 bowersj2 1975: if (ele.name == checkName + '.forminput') {
1.15 bowersj2 1976: document.forms.helpform.elements[i].checked=value;
1977: }
1978: }
1979: }
1.112 albertel 1980: // -->
1.15 bowersj2 1981: </script>
1982: SCRIPT
1.68 sakharuk 1983: my %lt=&Apache::lonlocal::texthash(
1984: 'sar' => "Select All Resources",
1985: 'uar' => "Unselect All Resources");
1986:
1.15 bowersj2 1987: $buttons = <<BUTTONS;
1988: <br />
1.68 sakharuk 1989: <input type="button" onclick="checkall(true, '$var')" value="$lt{'sar'}" />
1990: <input type="button" onclick="checkall(false, '$var')" value="$lt{'uar'}" />
1.15 bowersj2 1991: <br />
1992: BUTTONS
1993: }
1994:
1.5 bowersj2 1995: if (defined $self->{ERROR_MSG}) {
1.14 bowersj2 1996: $result .= '<br /><font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br /><br />';
1.5 bowersj2 1997: }
1998:
1.15 bowersj2 1999: $result .= $buttons;
2000:
1.90 foxr 2001: my $filterFunc = $self->{FILTER_FUNC};
2002: my $choiceFunc = $self->{CHOICE_FUNC};
2003: my $valueFunc = $self->{VALUE_FUNC};
1.95 albertel 2004: my $multichoice = $self->{'multichoice'};
1.90 foxr 2005: my $option_vars = $self->{OPTION_VARS};
2006: my $option_texts = $self->{OPTION_TEXTS};
1.95 albertel 2007: my $addparts = $self->{'addparts'};
1.90 foxr 2008: my $headings_done = 0;
1.5 bowersj2 2009:
1.48 bowersj2 2010: # Evaluate the map url as needed
2011: my $mapUrl;
1.49 bowersj2 2012: if ($self->{EVAL_MAP_URL}) {
1.48 bowersj2 2013: my $mapUrlFunc = eval('sub { my $helper = shift; my $state = shift; ' .
2014: $self->{MAP_URL} . '}');
2015: $mapUrl = &$mapUrlFunc($helper, $self);
2016: } else {
2017: $mapUrl = $self->{MAP_URL};
2018: }
2019:
1.124 ! albertel 2020: my @defaultSymbs;
! 2021: if (defined($self->{DEFAULT_VALUE})) {
! 2022: my $valueFunc = eval($self->{DEFAULT_VALUE});
! 2023: die 'Error in default value code for variable ' .
! 2024: $self->{'variable'} . ', Perl said: ' . $@ if $@;
! 2025: @defaultSymbs = &$valueFunc($helper, $self);
! 2026: if (!$multichoice) { # only allowed 1
! 2027: @defaultSymbs = ($defaultSymbs[0]);
! 2028: }
! 2029: }
! 2030:
1.98 foxr 2031:
1.5 bowersj2 2032: # Create the composite function that renders the column on the nav map
2033: # have to admit any language that lets me do this can't be all bad
2034: # - Jeremy (Pythonista) ;-)
2035: my $checked = 0;
2036: my $renderColFunc = sub {
2037: my ($resource, $part, $params) = @_;
1.90 foxr 2038: my $result = "";
2039:
2040: if(!$headings_done) {
2041: if ($option_texts) {
2042: foreach my $text (@$option_texts) {
2043: $result .= "<th>$text</th>";
2044: }
2045: }
2046: $result .= "<th>Select</th>";
2047: $result .= "</tr><tr>"; # Close off the extra row and start a new one.
2048: $headings_done = 1;
2049: }
1.14 bowersj2 2050:
2051: my $inputType;
2052: if ($multichoice) { $inputType = 'checkbox'; }
2053: else {$inputType = 'radio'; }
2054:
1.5 bowersj2 2055: if (!&$choiceFunc($resource)) {
1.90 foxr 2056: $result .= '<td> </td>';
2057: return $result;
1.5 bowersj2 2058: } else {
1.90 foxr 2059: my $col = "";
1.98 foxr 2060: my $raw_name = &$valueFunc($resource);
1.90 foxr 2061: my $resource_name =
1.98 foxr 2062: HTML::Entities::encode($raw_name,"<>&\"'");
1.90 foxr 2063: if($option_vars) {
1.91 foxr 2064: foreach my $option_var (@$option_vars) {
1.99 foxr 2065: my $var_value = "\|\|\|" . $helper->{VARS}->{$option_var} .
2066: "\|\|\|";
1.98 foxr 2067: my $checked ="";
1.99 foxr 2068: if($var_value =~ /\Q|||$raw_name|||\E/) {
1.111 albertel 2069: $checked = "checked='checked'";
1.98 foxr 2070: }
1.90 foxr 2071: $col .=
1.91 foxr 2072: "<td align='center'><input type='checkbox' name ='$option_var".
2073: ".forminput' value='".
1.98 foxr 2074: $resource_name . "' $checked /> </td>";
1.90 foxr 2075: }
2076: }
2077:
2078: $col .= "<td align='center'><input type='$inputType' name='${var}.forminput' ";
1.124 ! albertel 2079: if (@defaultSymbs) {
! 2080: my $symb=$resource->symb();
! 2081: if (grep(/\Q$symb\E/,@defaultSymbs)) {
! 2082: $col .= "checked='checked' ";
! 2083: $checked = 1;
! 2084: }
! 2085: } else {
! 2086: if (!$checked && !$multichoice) {
! 2087: $col .= "checked='checked' ";
! 2088: $checked = 1;
! 2089: }
! 2090: if ($multichoice) { # all resources start checked; see bug 1174
! 2091: $col .= "checked='checked' ";
! 2092: $checked = 1;
! 2093: }
1.37 bowersj2 2094: }
1.90 foxr 2095: $col .= "value='" . $resource_name . "' /></td>";
1.95 albertel 2096:
1.90 foxr 2097: return $result.$col;
1.5 bowersj2 2098: }
2099: };
1.95 albertel 2100: my $renderPartsFunc = sub {
2101: my ($resource, $part, $params) = @_;
2102: my $col= "<td>";
2103: my $id=$resource->{ID};
2104: my $resource_name =
2105: &HTML::Entities::encode(&$valueFunc($resource),"<>&\"'");
2106: if ($addparts && (scalar(@{$resource->parts}) > 1)) {
2107: $col .= "<select onclick=\"javascript:updateRadio(this.form,'${var}.forminput','$resource_name');updateHidden(this.form,'$id','${var}');\" name='part_$id.forminput'>\n";
2108: $col .= "<option value=\"$part\">All Parts</option>\n";
2109: foreach my $part (@{$resource->parts}) {
2110: $col .= "<option value=\"$part\">Part: $part</option>\n";
2111: }
2112: $col .= "</select>";
2113: }
2114: $col .= "</td>";
2115: };
2116: $result.=(<<RADIO);
2117: <script type="text/javascript">
1.112 albertel 2118: // <!--
1.95 albertel 2119: function updateRadio(form,name,value) {
2120: var radiobutton=form[name];
2121: for (var i=0; i<radiobutton.length; i++) {
2122: if (radiobutton[i].value == value) {
2123: radiobutton[i].checked = true;
2124: break;
2125: }
2126: }
2127: }
2128: function updateHidden(form,id,name) {
2129: var select=form['part_'+id+'.forminput'];
2130: var hidden=form[name+'_part.forminput'];
2131: var which=select.selectedIndex;
2132: hidden.value=select.options[which].value;
2133: }
1.112 albertel 2134: // -->
1.95 albertel 2135: </script>
1.101 albertel 2136: <input type="hidden" name="${var}_part.forminput" />
1.5 bowersj2 2137:
1.95 albertel 2138: RADIO
1.100 albertel 2139: $env{'form.condition'} = !$self->{'toponly'};
1.95 albertel 2140: my $cols = [$renderColFunc];
2141: if ($self->{'addparts'}) { push(@$cols, $renderPartsFunc); }
2142: push(@$cols, Apache::lonnavmaps::resource());
1.46 bowersj2 2143: if ($self->{'addstatus'}) {
2144: push @$cols, (Apache::lonnavmaps::part_status_summary());
2145:
2146: }
1.5 bowersj2 2147: $result .=
1.46 bowersj2 2148: &Apache::lonnavmaps::render( { 'cols' => $cols,
1.5 bowersj2 2149: 'showParts' => 0,
2150: 'filterFunc' => $filterFunc,
1.13 bowersj2 2151: 'resource_no_folder_link' => 1,
1.66 albertel 2152: 'closeAllPages' => $self->{'closeallpages'},
1.29 bowersj2 2153: 'suppressEmptySequences' => $self->{'suppressEmptySequences'},
1.13 bowersj2 2154: 'iterator_map' => $mapUrl }
1.5 bowersj2 2155: );
1.15 bowersj2 2156:
2157: $result .= $buttons;
1.5 bowersj2 2158:
2159: return $result;
2160: }
2161:
2162: sub postprocess {
2163: my $self = shift;
1.14 bowersj2 2164:
2165: if ($self->{'multichoice'} && !$helper->{VARS}->{$self->{'variable'}}) {
2166: $self->{ERROR_MSG} = 'You must choose at least one resource to continue.';
2167: return 0;
2168: }
2169:
1.5 bowersj2 2170: if (defined($self->{NEXTSTATE})) {
2171: $helper->changeState($self->{NEXTSTATE});
2172: }
1.6 bowersj2 2173:
2174: return 1;
1.5 bowersj2 2175: }
2176:
2177: 1;
2178:
2179: package Apache::lonhelper::student;
2180:
2181: =pod
2182:
1.44 bowersj2 2183: =head2 Element: studentX<student, helper element>
1.5 bowersj2 2184:
2185: Student elements display a choice of students enrolled in the current
2186: course. Currently it is primitive; this is expected to evolve later.
2187:
1.48 bowersj2 2188: Student elements take the following attributes:
2189:
2190: =over 4
2191:
2192: =item * B<variable>:
2193:
2194: Does what it usually does: declare which helper variable to put the
2195: result in.
2196:
2197: =item * B<multichoice>:
2198:
2199: If true allows the user to select multiple students. Defaults to false.
2200:
2201: =item * B<coursepersonnel>:
2202:
2203: If true adds the course personnel to the top of the student
2204: selection. Defaults to false.
2205:
2206: =item * B<activeonly>:
2207:
2208: If true, only active students and course personnel will be
2209: shown. Defaults to false.
2210:
1.123 albertel 2211: =item * B<emptyallowed>:
2212:
2213: If true, the selection of no users is allowed. Defaults to false.
2214:
1.48 bowersj2 2215: =back
1.5 bowersj2 2216:
2217: =cut
2218:
2219: no strict;
2220: @ISA = ("Apache::lonhelper::element");
2221: use strict;
1.59 bowersj2 2222: use Apache::lonlocal;
1.100 albertel 2223: use Apache::lonnet;
1.5 bowersj2 2224:
2225: BEGIN {
1.7 bowersj2 2226: &Apache::lonhelper::register('Apache::lonhelper::student',
1.5 bowersj2 2227: ('student'));
2228: }
2229:
2230: sub new {
2231: my $ref = Apache::lonhelper::element->new();
2232: bless($ref);
2233: }
1.4 bowersj2 2234:
1.5 bowersj2 2235: sub start_student {
1.4 bowersj2 2236: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
2237:
2238: if ($target ne 'helper') {
2239: return '';
2240: }
2241:
1.5 bowersj2 2242: $paramHash->{'variable'} = $token->[2]{'variable'};
2243: $helper->declareVar($paramHash->{'variable'});
2244: $paramHash->{'multichoice'} = $token->[2]{'multichoice'};
1.39 bowersj2 2245: $paramHash->{'coursepersonnel'} = $token->[2]{'coursepersonnel'};
1.93 albertel 2246: $paramHash->{'activeonly'} = $token->[2]{'activeonly'};
1.12 bowersj2 2247: if (defined($token->[2]{'nextstate'})) {
2248: $paramHash->{NEXTSTATE} = $token->[2]{'nextstate'};
2249: }
1.123 albertel 2250: $paramHash->{'emptyallowed'} = $token->[2]{'emptyallowed'};
1.12 bowersj2 2251:
1.5 bowersj2 2252: }
2253:
2254: sub end_student {
2255: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
2256:
2257: if ($target ne 'helper') {
2258: return '';
2259: }
2260: Apache::lonhelper::student->new();
1.3 bowersj2 2261: }
1.5 bowersj2 2262:
2263: sub render {
2264: my $self = shift;
2265: my $result = '';
2266: my $buttons = '';
1.18 bowersj2 2267: my $var = $self->{'variable'};
1.5 bowersj2 2268:
2269: if ($self->{'multichoice'}) {
2270: $result = <<SCRIPT;
1.112 albertel 2271: <script type="text/javascript">
2272: // <!--
1.18 bowersj2 2273: function checkall(value, checkName) {
1.15 bowersj2 2274: for (i=0; i<document.forms.helpform.elements.length; i++) {
1.18 bowersj2 2275: ele = document.forms.helpform.elements[i];
2276: if (ele.name == checkName + '.forminput') {
2277: document.forms.helpform.elements[i].checked=value;
2278: }
1.5 bowersj2 2279: }
2280: }
1.58 sakharuk 2281: function checksec(value) {
1.53 sakharuk 2282: for (i=0; i<document.forms.helpform.elements.length; i++) {
2283: comp = document.forms.helpform.elements.chksec.value;
2284: if (document.forms.helpform.elements[i].value.indexOf(':'+comp+':') != -1) {
1.82 sakharuk 2285: if (document.forms.helpform.elements[i].value.indexOf(':Active') != -1) {
2286: document.forms.helpform.elements[i].checked=value;
2287: }
1.53 sakharuk 2288: }
2289: }
2290: }
2291: function checkactive() {
2292: for (i=0; i<document.forms.helpform.elements.length; i++) {
2293: if (document.forms.helpform.elements[i].value.indexOf(':Active') != -1) {
2294: document.forms.helpform.elements[i].checked=true;
1.82 sakharuk 2295: }
2296: }
2297: }
2298: function uncheckexpired() {
2299: for (i=0; i<document.forms.helpform.elements.length; i++) {
2300: if (document.forms.helpform.elements[i].value.indexOf(':Expired') != -1) {
2301: document.forms.helpform.elements[i].checked=false;
2302: }
1.53 sakharuk 2303: }
2304: }
1.113 foxr 2305: function getDesiredState() { // Return desired person state radio value.
2306: numRadio = document.forms.helpform.personstate.length;
2307: for (i =0; i < numRadio; i++) {
2308: if (document.forms.helpform.personstate[i].checked) {
2309: return document.forms.helpform.personstate[i].value;
2310: }
2311: }
2312: return "";
2313: }
2314:
2315: function checksections(value) { // Check selected sections.
2316: numSections = document.forms.helpform.chosensections.length;
2317: desiredState = getDesiredState();
2318:
1.116 albertel 2319: for (var option = 0; option < numSections; option++) {
1.113 foxr 2320: if(document.forms.helpform.chosensections.options[option].selected) {
2321: section = document.forms.helpform.chosensections.options[option].text;
1.116 albertel 2322: if (section == "none") {
1.113 foxr 2323: section ="";
2324: }
2325: for (i = 0; i < document.forms.helpform.elements.length; i++ ) {
2326: if (document.forms.helpform.elements[i].value.indexOf(':') != -1) {
2327: info = document.forms.helpform.elements[i].value.split(':');
2328: hisSection = info[2];
2329: hisState = info[4];
1.116 albertel 2330: if (desiredState == hisState ||
2331: desiredState == "All") {
2332: if(hisSection == section ||
2333: section =="" ) {
2334: document.forms.helpform.elements[i].checked = value;
2335: }
1.113 foxr 2336: }
2337: }
2338: }
2339: }
2340: }
2341: }
1.112 albertel 2342: // -->
1.5 bowersj2 2343: </script>
2344: SCRIPT
1.59 bowersj2 2345:
1.68 sakharuk 2346: my %lt=&Apache::lonlocal::texthash(
2347: 'ocs' => "Select Only Current Students",
1.82 sakharuk 2348: 'ues' => "Unselect Expired Students",
1.68 sakharuk 2349: 'sas' => "Select All Students",
2350: 'uas' => "Unselect All Students",
1.82 sakharuk 2351: 'sfsg' => "Select Current Students for Section/Group",
1.68 sakharuk 2352: 'ufsg' => "Unselect for Section/Group");
2353:
1.5 bowersj2 2354: $buttons = <<BUTTONS;
2355: <br />
1.92 foxr 2356: <table>
2357:
2358: <tr>
2359: <td><input type="button" onclick="checkall(true, '$var')" value="$lt{'sas'}" /></td>
2360: <td> <input type="button" onclick="checkall(false, '$var')" value="$lt{'uas'}" /><br /></td>
2361: </tr>
1.113 foxr 2362:
1.92 foxr 2363: </table>
1.5 bowersj2 2364: <br />
2365: BUTTONS
2366: }
2367:
2368: if (defined $self->{ERROR_MSG}) {
2369: $result .= '<font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br /><br />';
2370: }
2371:
1.39 bowersj2 2372: my $choices = [];
2373:
2374: # Load up the non-students, if necessary
2375: if ($self->{'coursepersonnel'}) {
2376: my %coursepersonnel = Apache::lonnet::get_course_adv_roles();
2377: for (sort keys %coursepersonnel) {
2378: for my $role (split /,/, $coursepersonnel{$_}) {
2379: # extract the names so we can sort them
2380: my @people;
2381:
2382: for (split /,/, $role) {
2383: push @people, [split /:/, $role];
2384: }
2385:
2386: @people = sort { $a->[0] cmp $b->[0] } @people;
2387:
2388: for my $person (@people) {
2389: push @$choices, [join(':', @$person), $person->[0], '', $_];
2390: }
2391: }
2392: }
2393: }
1.5 bowersj2 2394:
2395: # Constants
2396: my $section = Apache::loncoursedata::CL_SECTION();
2397: my $fullname = Apache::loncoursedata::CL_FULLNAME();
1.48 bowersj2 2398: my $status = Apache::loncoursedata::CL_STATUS();
1.5 bowersj2 2399:
1.39 bowersj2 2400: # Load up the students
2401: my $classlist = &Apache::loncoursedata::get_classlist();
2402: my @keys = keys %{$classlist};
1.5 bowersj2 2403: # Sort by: Section, name
2404: @keys = sort {
1.39 bowersj2 2405: if ($classlist->{$a}->[$section] ne $classlist->{$b}->[$section]) {
2406: return $classlist->{$a}->[$section] cmp $classlist->{$b}->[$section];
1.5 bowersj2 2407: }
1.39 bowersj2 2408: return $classlist->{$a}->[$fullname] cmp $classlist->{$b}->[$fullname];
1.5 bowersj2 2409: } @keys;
2410:
1.39 bowersj2 2411: # username, fullname, section, type
2412: for (@keys) {
1.48 bowersj2 2413: # Filter out inactive students if we've set "activeonly"
2414: if (!$self->{'activeonly'} || $classlist->{$_}->[$status] eq
2415: 'Active') {
2416: push @$choices, [$_, $classlist->{$_}->[$fullname],
1.53 sakharuk 2417: $classlist->{$_}->[$section],
2418: $classlist->{$_}->[$status], 'Student'];
1.48 bowersj2 2419: }
1.39 bowersj2 2420: }
2421:
1.68 sakharuk 2422: my $name = $self->{'coursepersonnel'} ? &mt('Name') : &mt('Student Name');
1.5 bowersj2 2423: my $type = 'radio';
2424: if ($self->{'multichoice'}) { $type = 'checkbox'; }
2425: $result .= "<table cellspacing='2' cellpadding='2' border='0'>\n";
1.39 bowersj2 2426: $result .= "<tr><td></td><td align='center'><b>$name</b></td>".
1.59 bowersj2 2427: "<td align='center'><b>" . &mt('Section') . "</b></td>" .
1.68 sakharuk 2428: "<td align='center'><b>".&mt('Status')."</b></td>" .
2429: "<td align='center'><b>" . &mt("Role") . "</b></td>" .
2430: "<td align='center'><b>".&mt('Username').":".&mt('Domain')."</b></td></tr>";
1.5 bowersj2 2431:
2432: my $checked = 0;
1.39 bowersj2 2433: for my $choice (@$choices) {
1.5 bowersj2 2434: $result .= "<tr><td><input type='$type' name='" .
2435: $self->{'variable'} . '.forminput' . "'";
2436:
2437: if (!$self->{'multichoice'} && !$checked) {
1.111 albertel 2438: $result .= " checked='checked' ";
1.5 bowersj2 2439: $checked = 1;
2440: }
2441: $result .=
1.89 foxr 2442: " value='" . HTML::Entities::encode($choice->[0] . ':'
2443: .$choice->[2] . ':'
2444: .$choice->[1] . ':'
2445: .$choice->[3], "<>&\"'")
1.5 bowersj2 2446: . "' /></td><td>"
1.67 albertel 2447: . HTML::Entities::encode($choice->[1],'<>&"')
1.5 bowersj2 2448: . "</td><td align='center'>"
1.67 albertel 2449: . HTML::Entities::encode($choice->[2],'<>&"')
1.39 bowersj2 2450: . "</td>\n<td>"
1.67 albertel 2451: . HTML::Entities::encode($choice->[3],'<>&"')
1.53 sakharuk 2452: . "</td>\n<td>"
1.67 albertel 2453: . HTML::Entities::encode($choice->[4],'<>&"')
1.53 sakharuk 2454: . "</td>\n<td>"
1.67 albertel 2455: . HTML::Entities::encode($choice->[0],'<>&"')
1.53 sakharuk 2456: . "</td></tr>\n";
1.5 bowersj2 2457: }
2458:
2459: $result .= "</table>\n\n";
1.113 foxr 2460: $result .= $buttons;
2461: #
2462: # now add the fancy section choice... first enumerate the sections:
1.116 albertel 2463: if ($self->{'multichoice'}) {
2464: my %sections;
2465: for my $key (@keys) {
2466: my $section_name = $classlist->{$key}->[$section];
2467: if ($section_name ne "") {
2468: $sections{$section_name} = 1;
2469: }
2470: }
2471: # The variable $choice_widget will have the html to make the choice
2472: # selector.
2473: my $size=5;
2474: if (scalar(keys(%sections)) < 5) {
2475: $size=scalar(keys(%sections));
2476: }
2477: my $choice_widget = '<select multiple name="chosensections" size="'.$size.'">'."\n";
2478: foreach my $sec (sort {lc($a) cmp lc($b)} (keys(%sections))) {
2479: $choice_widget .= "<option name=\"$sec\">$sec</option>\n";
1.113 foxr 2480: }
1.116 albertel 2481: $choice_widget .= "<option>none</option></select>\n";
1.113 foxr 2482:
1.116 albertel 2483: # Build a table without any borders to contain the section based
2484: # selection:
1.113 foxr 2485:
1.116 albertel 2486: my $section_selectors =<<SECTIONSELECT;
2487: <table border="0">
2488: <tr valign="top">
2489: <td>For Sections:</td><td>$choice_widget</td>
2490: <td><label><input type="radio" name="personstate" value="Active" checked />
2491: Current Students</label></td>
2492: <td><label><input type="radio" name="personstate" value="All" />
2493: All students</label></td>
2494: <td><label><input type="radio" name="personstate" value="Expired" />
2495: Expired Students</label></td>
2496: </tr>
2497: <tr>
2498: <td><input type="button" value="Select" onclick="checksections(true);" /></td>
2499: <td><input type="button" value="Unselect" onclick="checksections(false);" /></td></tr>
2500: </table>
2501: <br />
2502: SECTIONSELECT
2503: $result .= $section_selectors;
2504: }
1.5 bowersj2 2505: return $result;
2506: }
2507:
1.6 bowersj2 2508: sub postprocess {
2509: my $self = shift;
2510:
1.100 albertel 2511: my $result = $env{'form.' . $self->{'variable'} . '.forminput'};
1.123 albertel 2512: if (!$result && !$self->{'emptyallowed'}) {
2513: if ($self->{'coursepersonnel'}) {
2514: $self->{ERROR_MSG} =
2515: &mt('You must choose at least one user to continue.');
2516: } else {
2517: $self->{ERROR_MSG} =
2518: &mt('You must choose at least one student to continue.');
2519: }
1.6 bowersj2 2520: return 0;
2521: }
2522:
2523: if (defined($self->{NEXTSTATE})) {
2524: $helper->changeState($self->{NEXTSTATE});
2525: }
2526:
2527: return 1;
2528: }
2529:
1.5 bowersj2 2530: 1;
2531:
2532: package Apache::lonhelper::files;
2533:
2534: =pod
2535:
1.44 bowersj2 2536: =head2 Element: filesX<files, helper element>
1.5 bowersj2 2537:
2538: files allows the users to choose files from a given directory on the
2539: server. It is always multichoice and stores the result as a triple-pipe
2540: delimited entry in the helper variables.
2541:
2542: Since it is extremely unlikely that you can actually code a constant
2543: representing the directory you wish to allow the user to search, <files>
2544: takes a subroutine that returns the name of the directory you wish to
2545: have the user browse.
2546:
2547: files accepts the attribute "variable" to control where the files chosen
2548: are put. It accepts the attribute "multichoice" as the other attribute,
2549: defaulting to false, which if true will allow the user to select more
2550: then one choice.
2551:
1.44 bowersj2 2552: <files> accepts three subtags:
2553:
2554: =over 4
2555:
2556: =item * B<nextstate>: works as it does with the other tags.
2557:
2558: =item * B<filechoice>: When the contents of this tag are surrounded by
2559: "sub {" and "}", will return a string representing what directory
2560: on the server to allow the user to choose files from.
2561:
2562: =item * B<filefilter>: Should contain Perl code that when surrounded
2563: by "sub { my $filename = shift; " and "}", returns a true value if
2564: the user can pick that file, or false otherwise. The filename
2565: passed to the function will be just the name of the file, with no
2566: path info. By default, a filter function will be used that will
2567: mask out old versions of files. This function is available as
2568: Apache::lonhelper::files::not_old_version if you want to use it to
2569: composite your own filters.
2570:
2571: =back
2572:
2573: B<General security note>: You should ensure the user can not somehow
2574: pass something into your code that would allow them to look places
2575: they should not be able to see, like the C</etc/> directory. However,
2576: the security impact would be minimal, since it would only expose
2577: the existence of files, there should be no way to parlay that into
2578: viewing the files.
1.5 bowersj2 2579:
2580: =cut
2581:
2582: no strict;
2583: @ISA = ("Apache::lonhelper::element");
2584: use strict;
1.59 bowersj2 2585: use Apache::lonlocal;
1.100 albertel 2586: use Apache::lonnet;
1.32 bowersj2 2587: use Apache::lonpubdir; # for getTitleString
2588:
1.5 bowersj2 2589: BEGIN {
1.7 bowersj2 2590: &Apache::lonhelper::register('Apache::lonhelper::files',
2591: ('files', 'filechoice', 'filefilter'));
1.5 bowersj2 2592: }
2593:
1.44 bowersj2 2594: sub not_old_version {
2595: my $file = shift;
2596:
2597: # Given a file name, return false if it is an "old version" of a
2598: # file, or true if it is not.
2599:
2600: if ($file =~ /^.*\.[0-9]+\.[A-Za-z]+(\.meta)?$/) {
2601: return 0;
2602: }
2603: return 1;
2604: }
2605:
1.5 bowersj2 2606: sub new {
2607: my $ref = Apache::lonhelper::element->new();
2608: bless($ref);
2609: }
2610:
2611: sub start_files {
2612: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
2613:
2614: if ($target ne 'helper') {
2615: return '';
2616: }
2617: $paramHash->{'variable'} = $token->[2]{'variable'};
2618: $helper->declareVar($paramHash->{'variable'});
2619: $paramHash->{'multichoice'} = $token->[2]{'multichoice'};
2620: }
2621:
2622: sub end_files {
2623: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
2624:
2625: if ($target ne 'helper') {
2626: return '';
2627: }
2628: if (!defined($paramHash->{FILTER_FUNC})) {
2629: $paramHash->{FILTER_FUNC} = sub { return 1; };
2630: }
2631: Apache::lonhelper::files->new();
2632: }
2633:
2634: sub start_filechoice {
2635: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
2636:
2637: if ($target ne 'helper') {
2638: return '';
2639: }
2640: $paramHash->{'filechoice'} = Apache::lonxml::get_all_text('/filechoice',
2641: $parser);
2642: }
2643:
2644: sub end_filechoice { return ''; }
2645:
2646: sub start_filefilter {
2647: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
2648:
2649: if ($target ne 'helper') {
2650: return '';
2651: }
2652:
2653: my $contents = Apache::lonxml::get_all_text('/filefilter',
2654: $parser);
2655: $contents = 'sub { my $filename = shift; ' . $contents . '}';
2656: $paramHash->{FILTER_FUNC} = eval $contents;
2657: }
2658:
2659: sub end_filefilter { return ''; }
1.3 bowersj2 2660:
1.87 matthew 2661: {
2662: # used to generate unique id attributes for <input> tags.
2663: # internal use only.
2664: my $id=0;
2665: sub new_id { return $id++;}
2666: }
2667:
1.3 bowersj2 2668: sub render {
2669: my $self = shift;
1.5 bowersj2 2670: my $result = '';
2671: my $var = $self->{'variable'};
2672:
2673: my $subdirFunc = eval('sub {' . $self->{'filechoice'} . '}');
1.11 bowersj2 2674: die 'Error in resource filter code for variable ' .
2675: {'variable'} . ', Perl said:' . $@ if $@;
2676:
1.5 bowersj2 2677: my $subdir = &$subdirFunc();
2678:
2679: my $filterFunc = $self->{FILTER_FUNC};
1.44 bowersj2 2680: if (!defined($filterFunc)) {
2681: $filterFunc = ¬_old_version;
2682: }
1.5 bowersj2 2683: my $buttons = '';
1.22 bowersj2 2684: my $type = 'radio';
2685: if ($self->{'multichoice'}) {
2686: $type = 'checkbox';
2687: }
1.5 bowersj2 2688:
2689: if ($self->{'multichoice'}) {
2690: $result = <<SCRIPT;
1.112 albertel 2691: <script type="text/javascript">
2692: // <!--
1.18 bowersj2 2693: function checkall(value, checkName) {
1.15 bowersj2 2694: for (i=0; i<document.forms.helpform.elements.length; i++) {
2695: ele = document.forms.helpform.elements[i];
1.18 bowersj2 2696: if (ele.name == checkName + '.forminput') {
1.15 bowersj2 2697: document.forms.helpform.elements[i].checked=value;
1.5 bowersj2 2698: }
2699: }
2700: }
1.21 bowersj2 2701:
1.22 bowersj2 2702: function checkallclass(value, className) {
1.21 bowersj2 2703: for (i=0; i<document.forms.helpform.elements.length; i++) {
2704: ele = document.forms.helpform.elements[i];
1.22 bowersj2 2705: if (ele.type == "$type" && ele.onclick) {
1.21 bowersj2 2706: document.forms.helpform.elements[i].checked=value;
2707: }
2708: }
2709: }
1.112 albertel 2710: // -->
1.5 bowersj2 2711: </script>
2712: SCRIPT
1.68 sakharuk 2713: my %lt=&Apache::lonlocal::texthash(
2714: 'saf' => "Select All Files",
2715: 'uaf' => "Unselect All Files");
2716: $buttons = <<BUTTONS;
1.5 bowersj2 2717: <br />
1.68 sakharuk 2718: <input type="button" onclick="checkall(true, '$var')" value="$lt{'saf'}" />
2719: <input type="button" onclick="checkall(false, '$var')" value="$lt{'uaf'}" />
1.23 bowersj2 2720: BUTTONS
2721:
1.69 sakharuk 2722: %lt=&Apache::lonlocal::texthash(
1.68 sakharuk 2723: 'sap' => "Select All Published",
2724: 'uap' => "Unselect All Published");
1.23 bowersj2 2725: if ($helper->{VARS}->{'construction'}) {
1.68 sakharuk 2726: $buttons .= <<BUTTONS;
2727: <input type="button" onclick="checkallclass(true, 'Published')" value="$lt{'sap'}" />
2728: <input type="button" onclick="checkallclass(false, 'Published')" value="$lt{'uap'}" />
1.5 bowersj2 2729: <br />
2730: BUTTONS
1.23 bowersj2 2731: }
1.5 bowersj2 2732: }
2733:
2734: # Get the list of files in this directory.
2735: my @fileList;
2736:
2737: # If the subdirectory is in local CSTR space
1.47 albertel 2738: my $metadir;
2739: if ($subdir =~ m|/home/([^/]+)/public_html/(.*)|) {
1.110 albertel 2740: my ($user,$domain)=
2741: &Apache::loncacc::constructaccess($subdir,
2742: $Apache::lonnet::perlvar{'lonDefDomain'});
1.47 albertel 2743: $metadir='/res/'.$domain.'/'.$user.'/'.$2;
2744: @fileList = &Apache::lonnet::dirlist($subdir, $domain, $user, '');
2745: } elsif ($subdir =~ m|^~([^/]+)/(.*)$|) {
2746: $subdir='/home/'.$1.'/public_html/'.$2;
1.110 albertel 2747: my ($user,$domain)=
2748: &Apache::loncacc::constructaccess($subdir,
2749: $Apache::lonnet::perlvar{'lonDefDomain'});
1.47 albertel 2750: $metadir='/res/'.$domain.'/'.$user.'/'.$2;
1.5 bowersj2 2751: @fileList = &Apache::lonnet::dirlist($subdir, $domain, $user, '');
2752: } else {
2753: # local library server resource space
1.100 albertel 2754: @fileList = &Apache::lonnet::dirlist($subdir, $env{'user.domain'}, $env{'user.name'}, '');
1.5 bowersj2 2755: }
1.3 bowersj2 2756:
1.44 bowersj2 2757: # Sort the fileList into order
1.85 albertel 2758: @fileList = sort {lc($a) cmp lc($b)} @fileList;
1.44 bowersj2 2759:
1.5 bowersj2 2760: $result .= $buttons;
2761:
1.6 bowersj2 2762: if (defined $self->{ERROR_MSG}) {
2763: $result .= '<br /><font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br /><br />';
2764: }
2765:
1.20 bowersj2 2766: $result .= '<table border="0" cellpadding="2" cellspacing="0">';
1.5 bowersj2 2767:
2768: # Keeps track if there are no choices, prints appropriate error
2769: # if there are none.
2770: my $choices = 0;
2771: # Print each legitimate file choice.
2772: for my $file (@fileList) {
2773: $file = (split(/&/, $file))[0];
2774: if ($file eq '.' || $file eq '..') {
2775: next;
2776: }
2777: my $fileName = $subdir .'/'. $file;
2778: if (&$filterFunc($file)) {
1.24 sakharuk 2779: my $status;
2780: my $color;
2781: if ($helper->{VARS}->{'construction'}) {
2782: ($status, $color) = @{fileState($subdir, $file)};
2783: } else {
2784: $status = '';
2785: $color = '';
2786: }
1.22 bowersj2 2787:
1.32 bowersj2 2788: # Get the title
1.47 albertel 2789: my $title = Apache::lonpubdir::getTitleString(($metadir?$metadir:$subdir) .'/'. $file);
1.32 bowersj2 2790:
1.22 bowersj2 2791: # Netscape 4 is stupid and there's nowhere to put the
2792: # information on the input tag that the file is Published,
2793: # Unpublished, etc. In *real* browsers we can just say
2794: # "class='Published'" and check the className attribute of
2795: # the input tag, but Netscape 4 is too stupid to understand
2796: # that attribute, and un-comprehended attributes are not
2797: # reflected into the object model. So instead, what I do
2798: # is either have or don't have an "onclick" handler that
2799: # does nothing, give Published files the onclick handler, and
2800: # have the checker scripts check for that. Stupid and clumsy,
2801: # and only gives us binary "yes/no" information (at least I
2802: # couldn't figure out how to reach into the event handler's
2803: # actual code to retreive a value), but it works well enough
2804: # here.
1.23 bowersj2 2805:
1.22 bowersj2 2806: my $onclick = '';
1.23 bowersj2 2807: if ($status eq 'Published' && $helper->{VARS}->{'construction'}) {
1.22 bowersj2 2808: $onclick = 'onclick="a=1" ';
2809: }
1.87 matthew 2810: my $id = &new_id();
1.20 bowersj2 2811: $result .= '<tr><td align="right"' . " bgcolor='$color'>" .
1.22 bowersj2 2812: "<input $onclick type='$type' name='" . $var
1.89 foxr 2813: . ".forminput' ".qq{id="$id"}." value='" . HTML::Entities::encode($fileName,"<>&\"'").
1.5 bowersj2 2814: "'";
2815: if (!$self->{'multichoice'} && $choices == 0) {
1.111 albertel 2816: $result .= ' checked="checked"';
1.5 bowersj2 2817: }
1.87 matthew 2818: $result .= "/></td><td bgcolor='$color'>".
2819: qq{<label for="$id">}. $file . "</label></td>" .
1.32 bowersj2 2820: "<td bgcolor='$color'>$title</td>" .
2821: "<td bgcolor='$color'>$status</td>" . "</tr>\n";
1.5 bowersj2 2822: $choices++;
2823: }
2824: }
2825:
2826: $result .= "</table>\n";
2827:
2828: if (!$choices) {
1.47 albertel 2829: $result .= '<font color="#FF0000">There are no files available to select in this directory ('.$subdir.'). Please go back and select another option.</font><br /><br />';
1.5 bowersj2 2830: }
2831:
2832: $result .= $buttons;
2833:
2834: return $result;
1.20 bowersj2 2835: }
2836:
2837: # Determine the state of the file: Published, unpublished, modified.
2838: # Return the color it should be in and a label as a two-element array
2839: # reference.
2840: # Logic lifted from lonpubdir.pm, even though I don't know that it's still
2841: # the most right thing to do.
2842:
2843: sub fileState {
2844: my $constructionSpaceDir = shift;
2845: my $file = shift;
2846:
1.100 albertel 2847: my ($uname,$udom)=($env{'user.name'},$env{'user.domain'});
2848: if ($env{'request.role'}=~/^ca\./) {
2849: (undef,$udom,$uname)=split(/\//,$env{'request.role'});
1.86 albertel 2850: }
1.20 bowersj2 2851: my $docroot = $Apache::lonnet::perlvar{'lonDocRoot'};
2852: my $subdirpart = $constructionSpaceDir;
1.86 albertel 2853: $subdirpart =~ s/^\/home\/$uname\/public_html//;
2854: my $resdir = $docroot . '/res/' . $udom . '/' . $uname .
1.20 bowersj2 2855: $subdirpart;
2856:
2857: my @constructionSpaceFileStat = stat($constructionSpaceDir . '/' . $file);
2858: my @resourceSpaceFileStat = stat($resdir . '/' . $file);
2859: if (!@resourceSpaceFileStat) {
2860: return ['Unpublished', '#FFCCCC'];
2861: }
2862:
2863: my $constructionSpaceFileModified = $constructionSpaceFileStat[9];
2864: my $resourceSpaceFileModified = $resourceSpaceFileStat[9];
2865:
2866: if ($constructionSpaceFileModified > $resourceSpaceFileModified) {
2867: return ['Modified', '#FFFFCC'];
2868: }
2869: return ['Published', '#CCFFCC'];
1.4 bowersj2 2870: }
1.5 bowersj2 2871:
1.4 bowersj2 2872: sub postprocess {
2873: my $self = shift;
1.100 albertel 2874: my $result = $env{'form.' . $self->{'variable'} . '.forminput'};
1.6 bowersj2 2875: if (!$result) {
2876: $self->{ERROR_MSG} = 'You must choose at least one file '.
2877: 'to continue.';
2878: return 0;
2879: }
2880:
1.5 bowersj2 2881: if (defined($self->{NEXTSTATE})) {
2882: $helper->changeState($self->{NEXTSTATE});
1.3 bowersj2 2883: }
1.6 bowersj2 2884:
2885: return 1;
1.3 bowersj2 2886: }
1.8 bowersj2 2887:
2888: 1;
2889:
1.11 bowersj2 2890: package Apache::lonhelper::section;
2891:
2892: =pod
2893:
1.44 bowersj2 2894: =head2 Element: sectionX<section, helper element>
1.11 bowersj2 2895:
2896: <section> allows the user to choose one or more sections from the current
2897: course.
2898:
2899: It takes the standard attributes "variable", "multichoice", and
2900: "nextstate", meaning what they do for most other elements.
2901:
2902: =cut
2903:
2904: no strict;
2905: @ISA = ("Apache::lonhelper::choices");
2906: use strict;
2907:
2908: BEGIN {
2909: &Apache::lonhelper::register('Apache::lonhelper::section',
2910: ('section'));
2911: }
2912:
2913: sub new {
2914: my $ref = Apache::lonhelper::choices->new();
2915: bless($ref);
2916: }
2917:
2918: sub start_section {
2919: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
2920:
2921: if ($target ne 'helper') {
2922: return '';
2923: }
1.12 bowersj2 2924:
2925: $paramHash->{CHOICES} = [];
2926:
1.11 bowersj2 2927: $paramHash->{'variable'} = $token->[2]{'variable'};
2928: $helper->declareVar($paramHash->{'variable'});
2929: $paramHash->{'multichoice'} = $token->[2]{'multichoice'};
2930: if (defined($token->[2]{'nextstate'})) {
1.12 bowersj2 2931: $paramHash->{NEXTSTATE} = $token->[2]{'nextstate'};
1.11 bowersj2 2932: }
2933:
2934: # Populate the CHOICES element
2935: my %choices;
2936:
2937: my $section = Apache::loncoursedata::CL_SECTION();
2938: my $classlist = Apache::loncoursedata::get_classlist();
2939: foreach (keys %$classlist) {
2940: my $sectionName = $classlist->{$_}->[$section];
2941: if (!$sectionName) {
2942: $choices{"No section assigned"} = "";
2943: } else {
2944: $choices{$sectionName} = $sectionName;
2945: }
1.12 bowersj2 2946: }
2947:
1.11 bowersj2 2948: for my $sectionName (sort(keys(%choices))) {
1.12 bowersj2 2949:
1.11 bowersj2 2950: push @{$paramHash->{CHOICES}}, [$sectionName, $sectionName];
2951: }
2952: }
2953:
1.12 bowersj2 2954: sub end_section {
2955: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.11 bowersj2 2956:
1.12 bowersj2 2957: if ($target ne 'helper') {
2958: return '';
2959: }
2960: Apache::lonhelper::section->new();
2961: }
1.11 bowersj2 2962: 1;
2963:
1.34 bowersj2 2964: package Apache::lonhelper::string;
2965:
2966: =pod
2967:
1.44 bowersj2 2968: =head2 Element: stringX<string, helper element>
1.34 bowersj2 2969:
2970: string elements provide a string entry field for the user. string elements
2971: take the usual 'variable' and 'nextstate' parameters. string elements
2972: also pass through 'maxlength' and 'size' attributes to the input tag.
2973:
2974: string honors the defaultvalue tag, if given.
2975:
1.38 bowersj2 2976: string honors the validation function, if given.
2977:
1.34 bowersj2 2978: =cut
2979:
2980: no strict;
2981: @ISA = ("Apache::lonhelper::element");
2982: use strict;
1.76 sakharuk 2983: use Apache::lonlocal;
1.34 bowersj2 2984:
2985: BEGIN {
2986: &Apache::lonhelper::register('Apache::lonhelper::string',
2987: ('string'));
2988: }
2989:
2990: sub new {
2991: my $ref = Apache::lonhelper::element->new();
2992: bless($ref);
2993: }
2994:
2995: # CONSTRUCTION: Construct the message element from the XML
2996: sub start_string {
2997: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
2998:
2999: if ($target ne 'helper') {
3000: return '';
3001: }
3002:
3003: $paramHash->{'variable'} = $token->[2]{'variable'};
3004: $helper->declareVar($paramHash->{'variable'});
3005: $paramHash->{'nextstate'} = $token->[2]{'nextstate'};
3006: $paramHash->{'maxlength'} = $token->[2]{'maxlength'};
3007: $paramHash->{'size'} = $token->[2]{'size'};
3008:
3009: return '';
3010: }
3011:
3012: sub end_string {
3013: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
3014:
3015: if ($target ne 'helper') {
3016: return '';
3017: }
3018: Apache::lonhelper::string->new();
3019: return '';
3020: }
3021:
3022: sub render {
3023: my $self = shift;
1.38 bowersj2 3024: my $result = '';
3025:
3026: if (defined $self->{ERROR_MSG}) {
1.97 albertel 3027: $result .= '<p><font color="#FF0000">' . $self->{ERROR_MSG} . '</font></p>';
1.38 bowersj2 3028: }
3029:
3030: $result .= '<input type="string" name="' . $self->{'variable'} . '.forminput"';
1.34 bowersj2 3031:
3032: if (defined($self->{'size'})) {
3033: $result .= ' size="' . $self->{'size'} . '"';
3034: }
3035: if (defined($self->{'maxlength'})) {
3036: $result .= ' maxlength="' . $self->{'maxlength'} . '"';
3037: }
3038:
3039: if (defined($self->{DEFAULT_VALUE})) {
3040: my $valueFunc = eval($self->{DEFAULT_VALUE});
3041: die 'Error in default value code for variable ' .
3042: $self->{'variable'} . ', Perl said: ' . $@ if $@;
3043: $result .= ' value="' . &$valueFunc($helper, $self) . '"';
3044: }
3045:
3046: $result .= ' />';
3047:
3048: return $result;
3049: }
3050:
3051: # If a NEXTSTATE was given, switch to it
3052: sub postprocess {
3053: my $self = shift;
1.38 bowersj2 3054:
3055: if (defined($self->{VALIDATOR})) {
3056: my $validator = eval($self->{VALIDATOR});
3057: die 'Died during evaluation of evaulation code; Perl said: ' . $@ if $@;
3058: my $invalid = &$validator($helper, $state, $self, $self->getValue());
3059: if ($invalid) {
3060: $self->{ERROR_MSG} = $invalid;
3061: return 0;
3062: }
3063: }
3064:
3065: if (defined($self->{'nextstate'})) {
3066: $helper->changeState($self->{'nextstate'});
1.34 bowersj2 3067: }
3068:
3069: return 1;
3070: }
3071:
3072: 1;
3073:
1.8 bowersj2 3074: package Apache::lonhelper::general;
3075:
3076: =pod
3077:
1.44 bowersj2 3078: =head2 General-purpose tag: <exec>X<exec, helper tag>
1.8 bowersj2 3079:
1.44 bowersj2 3080: The contents of the exec tag are executed as Perl code, B<not> inside a
1.100 albertel 3081: safe space, so the full range of $env and such is available. The code
1.8 bowersj2 3082: will be executed as a subroutine wrapped with the following code:
3083:
3084: "sub { my $helper = shift; my $state = shift;" and
3085:
3086: "}"
3087:
3088: The return value is ignored.
3089:
3090: $helper is the helper object. Feel free to add methods to the helper
3091: object to support whatever manipulation you may need to do (for instance,
3092: overriding the form location if the state is the final state; see
1.44 bowersj2 3093: parameter.helper for an example).
1.8 bowersj2 3094:
3095: $state is the $paramHash that has currently been generated and may
3096: be manipulated by the code in exec. Note that the $state is not yet
3097: an actual state B<object>, it is just a hash, so do not expect to
3098: be able to call methods on it.
3099:
3100: =cut
3101:
1.83 sakharuk 3102: use Apache::lonlocal;
1.102 albertel 3103: use Apache::lonnet;
1.83 sakharuk 3104:
1.8 bowersj2 3105: BEGIN {
3106: &Apache::lonhelper::register('Apache::lonhelper::general',
1.11 bowersj2 3107: 'exec', 'condition', 'clause',
3108: 'eval');
1.8 bowersj2 3109: }
3110:
3111: sub start_exec {
3112: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
3113:
3114: if ($target ne 'helper') {
3115: return '';
3116: }
3117:
3118: my $code = &Apache::lonxml::get_all_text('/exec', $parser);
3119:
3120: $code = eval ('sub { my $helper = shift; my $state = shift; ' .
3121: $code . "}");
1.11 bowersj2 3122: die 'Error in <exec>, Perl said: '. $@ if $@;
1.8 bowersj2 3123: &$code($helper, $paramHash);
3124: }
3125:
3126: sub end_exec { return ''; }
3127:
3128: =pod
3129:
3130: =head2 General-purpose tag: <condition>
3131:
3132: The <condition> tag allows you to mask out parts of the helper code
3133: depending on some programatically determined condition. The condition
3134: tag contains a tag <clause> which contains perl code that when wrapped
3135: with "sub { my $helper = shift; my $state = shift; " and "}", returns
3136: a true value if the XML in the condition should be evaluated as a normal
3137: part of the helper, or false if it should be completely discarded.
3138:
3139: The <clause> tag must be the first sub-tag of the <condition> tag or
3140: it will not work as expected.
3141:
3142: =cut
3143:
3144: # The condition tag just functions as a marker, it doesn't have
3145: # to "do" anything. Technically it doesn't even have to be registered
3146: # with the lonxml code, but I leave this here to be explicit about it.
3147: sub start_condition { return ''; }
3148: sub end_condition { return ''; }
3149:
3150: sub start_clause {
3151: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
3152:
3153: if ($target ne 'helper') {
3154: return '';
3155: }
3156:
3157: my $clause = Apache::lonxml::get_all_text('/clause', $parser);
3158: $clause = eval('sub { my $helper = shift; my $state = shift; '
3159: . $clause . '}');
1.11 bowersj2 3160: die 'Error in clause of condition, Perl said: ' . $@ if $@;
1.8 bowersj2 3161: if (!&$clause($helper, $paramHash)) {
3162: # Discard all text until the /condition.
3163: &Apache::lonxml::get_all_text('/condition', $parser);
3164: }
3165: }
3166:
3167: sub end_clause { return ''; }
1.11 bowersj2 3168:
3169: =pod
3170:
1.44 bowersj2 3171: =head2 General-purpose tag: <eval>X<eval, helper tag>
1.11 bowersj2 3172:
3173: The <eval> tag will be evaluated as a subroutine call passed in the
3174: current helper object and state hash as described in <condition> above,
3175: but is expected to return a string to be printed directly to the
3176: screen. This is useful for dynamically generating messages.
3177:
3178: =cut
3179:
3180: # This is basically a type of message.
3181: # Programmatically setting $paramHash->{NEXTSTATE} would work, though
3182: # it's probably bad form.
3183:
3184: sub start_eval {
3185: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
3186:
3187: if ($target ne 'helper') {
3188: return '';
3189: }
3190:
3191: my $program = Apache::lonxml::get_all_text('/eval', $parser);
3192: $program = eval('sub { my $helper = shift; my $state = shift; '
3193: . $program . '}');
3194: die 'Error in eval code, Perl said: ' . $@ if $@;
3195: $paramHash->{MESSAGE_TEXT} = &$program($helper, $paramHash);
3196: }
3197:
3198: sub end_eval {
3199: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
3200:
3201: if ($target ne 'helper') {
3202: return '';
3203: }
3204:
3205: Apache::lonhelper::message->new();
3206: }
3207:
1.13 bowersj2 3208: 1;
3209:
1.27 bowersj2 3210: package Apache::lonhelper::final;
3211:
3212: =pod
3213:
1.44 bowersj2 3214: =head2 Element: finalX<final, helper tag>
1.27 bowersj2 3215:
3216: <final> is a special element that works with helpers that use the <finalcode>
1.44 bowersj2 3217: tagX<finalcode, helper tag>. It goes through all the states and elements, executing the <finalcode>
1.27 bowersj2 3218: snippets and collecting the results. Finally, it takes the user out of the
3219: helper, going to a provided page.
3220:
1.34 bowersj2 3221: If the parameter "restartCourse" is true, this will override the buttons and
3222: will make a "Finish Helper" button that will re-initialize the course for them,
3223: which is useful for the Course Initialization helper so the users never see
3224: the old values taking effect.
3225:
1.93 albertel 3226: If the parameter "restartCourse" is not true a 'Finish' Button will be
3227: presented that takes the user back to whatever was defined as <exitpage>
3228:
1.27 bowersj2 3229: =cut
3230:
3231: no strict;
3232: @ISA = ("Apache::lonhelper::element");
3233: use strict;
1.62 matthew 3234: use Apache::lonlocal;
1.100 albertel 3235: use Apache::lonnet;
1.27 bowersj2 3236: BEGIN {
3237: &Apache::lonhelper::register('Apache::lonhelper::final',
3238: ('final', 'exitpage'));
3239: }
3240:
3241: sub new {
3242: my $ref = Apache::lonhelper::element->new();
3243: bless($ref);
3244: }
3245:
1.34 bowersj2 3246: sub start_final {
3247: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
3248:
3249: if ($target ne 'helper') {
3250: return '';
3251: }
3252:
3253: $paramHash->{'restartCourse'} = $token->[2]{'restartCourse'};
3254:
3255: return '';
3256: }
1.27 bowersj2 3257:
3258: sub end_final {
3259: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
3260:
3261: if ($target ne 'helper') {
3262: return '';
3263: }
3264:
3265: Apache::lonhelper::final->new();
3266:
3267: return '';
3268: }
3269:
3270: sub start_exitpage {
3271: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
3272:
3273: if ($target ne 'helper') {
3274: return '';
3275: }
3276:
3277: $paramHash->{EXIT_PAGE} = &Apache::lonxml::get_all_text('/exitpage',
3278: $parser);
3279:
3280: return '';
3281: }
3282:
3283: sub end_exitpage { return ''; }
3284:
3285: sub render {
3286: my $self = shift;
3287:
3288: my @results;
3289:
3290: # Collect all the results
3291: for my $stateName (keys %{$helper->{STATES}}) {
3292: my $state = $helper->{STATES}->{$stateName};
3293:
3294: for my $element (@{$state->{ELEMENTS}}) {
3295: if (defined($element->{FINAL_CODE})) {
3296: # Compile the code.
1.31 bowersj2 3297: my $code = 'sub { my $helper = shift; my $element = shift; '
3298: . $element->{FINAL_CODE} . '}';
1.27 bowersj2 3299: $code = eval($code);
3300: die 'Error while executing final code for element with var ' .
3301: $element->{'variable'} . ', Perl said: ' . $@ if $@;
3302:
1.31 bowersj2 3303: my $result = &$code($helper, $element);
1.27 bowersj2 3304: if ($result) {
3305: push @results, $result;
3306: }
3307: }
3308: }
3309: }
3310:
1.40 bowersj2 3311: my $result;
1.27 bowersj2 3312:
1.40 bowersj2 3313: if (scalar(@results) != 0) {
3314: $result .= "<ul>\n";
3315: for my $re (@results) {
3316: $result .= ' <li>' . $re . "</li>\n";
3317: }
3318:
3319: if (!@results) {
1.59 bowersj2 3320: $result .= ' <li>' .
3321: &mt('No changes were made to current settings.') . '</li>';
1.40 bowersj2 3322: }
3323:
3324: $result .= '</ul>';
1.34 bowersj2 3325: }
3326:
1.93 albertel 3327: my $actionURL = $self->{EXIT_PAGE};
3328: my $targetURL = '';
3329: my $finish=&mt('Finish');
1.34 bowersj2 3330: if ($self->{'restartCourse'}) {
1.103 albertel 3331: $actionURL = '/adm/roles';
1.93 albertel 3332: $targetURL = '/adm/menu';
1.100 albertel 3333: if ($env{'course.'.$env{'request.course.id'}.'.url'}=~/^uploaded/) {
1.64 albertel 3334: $targetURL = '/adm/coursedocs';
3335: } else {
3336: $targetURL = '/adm/navmaps';
3337: }
1.100 albertel 3338: if ($env{'course.'.$env{'request.course.id'}.'.clonedfrom'}) {
1.45 bowersj2 3339: $targetURL = '/adm/parmset?overview=1';
3340: }
1.93 albertel 3341: my $finish=&mt('Finish Course Initialization');
1.34 bowersj2 3342: }
1.93 albertel 3343: my $previous = HTML::Entities::encode(&mt("<- Previous"), '<>&"');
3344: my $next = HTML::Entities::encode(&mt("Next ->"), '<>&"');
3345: $result .= "<center>\n" .
3346: "<form action='".$actionURL."' method='post' target='loncapaclient'>\n" .
3347: "<input type='button' onclick='history.go(-1)' value='$previous' />" .
3348: "<input type='hidden' name='orgurl' value='$targetURL' />" .
3349: "<input type='hidden' name='selectrole' value='1' />\n" .
1.100 albertel 3350: "<input type='hidden' name='" . $env{'request.role'} .
1.93 albertel 3351: "' value='1' />\n<input type='submit' value='" . $finish . "' />\n" .
3352: "</form></center>";
1.34 bowersj2 3353:
1.40 bowersj2 3354: return $result;
1.34 bowersj2 3355: }
3356:
3357: sub overrideForm {
1.93 albertel 3358: return 1;
1.27 bowersj2 3359: }
3360:
3361: 1;
3362:
1.13 bowersj2 3363: package Apache::lonhelper::parmwizfinal;
3364:
3365: # This is the final state for the parmwizard. It is not generally useful,
3366: # so it is not perldoc'ed. It does its own processing.
3367: # It is represented with <parmwizfinal />, and
3368: # should later be moved to lonparmset.pm .
3369:
3370: no strict;
3371: @ISA = ('Apache::lonhelper::element');
3372: use strict;
1.69 sakharuk 3373: use Apache::lonlocal;
1.102 albertel 3374: use Apache::lonnet;
1.11 bowersj2 3375:
1.13 bowersj2 3376: BEGIN {
3377: &Apache::lonhelper::register('Apache::lonhelper::parmwizfinal',
3378: ('parmwizfinal'));
3379: }
3380:
3381: use Time::localtime;
3382:
3383: sub new {
3384: my $ref = Apache::lonhelper::choices->new();
3385: bless ($ref);
3386: }
3387:
3388: sub start_parmwizfinal { return ''; }
3389:
3390: sub end_parmwizfinal {
3391: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
3392:
3393: if ($target ne 'helper') {
3394: return '';
3395: }
3396: Apache::lonhelper::parmwizfinal->new();
3397: }
3398:
3399: # Renders a form that, when submitted, will form the input to lonparmset.pm
3400: sub render {
3401: my $self = shift;
3402: my $vars = $helper->{VARS};
3403:
3404: # FIXME: Unify my designators with the standard ones
1.48 bowersj2 3405: my %dateTypeHash = ('open_date' => "opening date",
3406: 'due_date' => "due date",
3407: 'answer_date' => "answer date",
3408: 'tries' => 'number of tries',
3409: 'weight' => 'problem weight'
1.38 bowersj2 3410: );
1.13 bowersj2 3411: my %parmTypeHash = ('open_date' => "0_opendate",
3412: 'due_date' => "0_duedate",
1.38 bowersj2 3413: 'answer_date' => "0_answerdate",
1.48 bowersj2 3414: 'tries' => '0_maxtries',
3415: 'weight' => '0_weight' );
1.107 albertel 3416: my %realParmName = ('open_date' => "opendate",
3417: 'due_date' => "duedate",
3418: 'answer_date' => "answerdate",
3419: 'tries' => 'maxtries',
3420: 'weight' => 'weight' );
1.13 bowersj2 3421:
3422: my $affectedResourceId = "";
3423: my $parm_name = $parmTypeHash{$vars->{ACTION_TYPE}};
3424: my $level = "";
1.27 bowersj2 3425: my $resourceString;
3426: my $symb;
3427: my $paramlevel;
1.95 albertel 3428:
1.13 bowersj2 3429: # Print the granularity, depending on the action
3430: if ($vars->{GRANULARITY} eq 'whole_course') {
1.76 sakharuk 3431: $resourceString .= '<li>'.&mt('for <b>all resources in the course</b>').'</li>';
1.104 albertel 3432: if ($vars->{TARGETS} eq 'course') {
3433: $level = 11; # general course, see lonparmset.pm perldoc
3434: } elsif ($vars->{TARGETS} eq 'section') {
3435: $level = 6;
3436: } else {
3437: $level = 3;
3438: }
1.13 bowersj2 3439: $affectedResourceId = "0.0";
1.27 bowersj2 3440: $symb = 'a';
3441: $paramlevel = 'general';
1.13 bowersj2 3442: } elsif ($vars->{GRANULARITY} eq 'map') {
1.41 bowersj2 3443: my $navmap = Apache::lonnavmaps::navmap->new();
1.35 bowersj2 3444: my $res = $navmap->getByMapPc($vars->{RESOURCE_ID});
1.13 bowersj2 3445: my $title = $res->compTitle();
1.27 bowersj2 3446: $symb = $res->symb();
1.78 sakharuk 3447: $resourceString .= '<li>'.&mt('for the map named [_1]',"<b>$title</b>").'</li>';
1.104 albertel 3448: if ($vars->{TARGETS} eq 'course') {
3449: $level = 10; # general course, see lonparmset.pm perldoc
3450: } elsif ($vars->{TARGETS} eq 'section') {
3451: $level = 5;
3452: } else {
3453: $level = 2;
3454: }
1.13 bowersj2 3455: $affectedResourceId = $vars->{RESOURCE_ID};
1.27 bowersj2 3456: $paramlevel = 'map';
1.13 bowersj2 3457: } else {
1.41 bowersj2 3458: my $navmap = Apache::lonnavmaps::navmap->new();
1.13 bowersj2 3459: my $res = $navmap->getById($vars->{RESOURCE_ID});
1.95 albertel 3460: my $part = $vars->{RESOURCE_ID_part};
3461: if ($part ne 'All Parts' && $part) { $parm_name=~s/^0/$part/; } else { $part=&mt('All Parts'); }
1.27 bowersj2 3462: $symb = $res->symb();
1.13 bowersj2 3463: my $title = $res->compTitle();
1.95 albertel 3464: $resourceString .= '<li>'.&mt('for the resource named [_1] part [_2]',"<b>$title</b>","<b>$part</b>").'</li>';
1.104 albertel 3465: if ($vars->{TARGETS} eq 'course') {
3466: $level = 7; # general course, see lonparmset.pm perldoc
3467: } elsif ($vars->{TARGETS} eq 'section') {
3468: $level = 4;
3469: } else {
3470: $level = 1;
3471: }
1.13 bowersj2 3472: $affectedResourceId = $vars->{RESOURCE_ID};
1.27 bowersj2 3473: $paramlevel = 'full';
1.13 bowersj2 3474: }
3475:
1.105 albertel 3476: my $result = "<form name='helpform' method='POST' action='/adm/parmset#$affectedResourceId&$parm_name&$level'>\n";
1.104 albertel 3477: $result .= "<input type='hidden' name='action' value='settable' />\n";
3478: $result .= "<input type='hidden' name='dis' value='helper' />\n";
1.107 albertel 3479: $result .= "<input type='hidden' name='pscat' value='".
3480: $realParmName{$vars->{ACTION_TYPE}}."' />\n";
1.95 albertel 3481: if ($vars->{GRANULARITY} eq 'resource') {
3482: $result .= "<input type='hidden' name='symb' value='".
3483: HTML::Entities::encode($symb,"'<>&\"") . "' />\n";
1.108 albertel 3484: } elsif ($vars->{GRANULARITY} eq 'map') {
3485: $result .= "<input type='hidden' name='pschp' value='".
3486: $affectedResourceId."' />\n";
1.95 albertel 3487: }
1.104 albertel 3488: my $part = $vars->{RESOURCE_ID_part};
3489: if ($part eq 'All Parts' || !$part) { $part=0; }
3490: $result .= "<input type='hidden' name='psprt' value='".
3491: HTML::Entities::encode($part,"'<>&\"") . "' />\n";
3492:
1.69 sakharuk 3493: $result .= '<p>'.&mt('Confirm that this information is correct, then click "Finish Helper" to complete setting the parameter.').'<ul>';
1.27 bowersj2 3494:
3495: # Print the type of manipulation:
1.73 albertel 3496: my $extra;
1.38 bowersj2 3497: if ($vars->{ACTION_TYPE} eq 'tries') {
1.73 albertel 3498: $extra = $vars->{TRIES};
1.38 bowersj2 3499: }
1.48 bowersj2 3500: if ($vars->{ACTION_TYPE} eq 'weight') {
1.73 albertel 3501: $extra = $vars->{WEIGHT};
3502: }
3503: $result .= "<li>";
1.74 matthew 3504: my $what = &mt($dateTypeHash{$vars->{ACTION_TYPE}});
1.73 albertel 3505: if ($extra) {
3506: $result .= &mt('Setting the [_1] to [_2]',"<b>$what</b>",$extra);
3507: } else {
3508: $result .= &mt('Setting the [_1]',"<b>$what</b>");
1.48 bowersj2 3509: }
1.38 bowersj2 3510: $result .= "</li>\n";
1.27 bowersj2 3511: if ($vars->{ACTION_TYPE} eq 'due_date' ||
3512: $vars->{ACTION_TYPE} eq 'answer_date') {
3513: # for due dates, we default to "date end" type entries
3514: $result .= "<input type='hidden' name='recent_date_end' " .
3515: "value='" . $vars->{PARM_DATE} . "' />\n";
3516: $result .= "<input type='hidden' name='pres_value' " .
3517: "value='" . $vars->{PARM_DATE} . "' />\n";
3518: $result .= "<input type='hidden' name='pres_type' " .
3519: "value='date_end' />\n";
3520: } elsif ($vars->{ACTION_TYPE} eq 'open_date') {
3521: $result .= "<input type='hidden' name='recent_date_start' ".
3522: "value='" . $vars->{PARM_DATE} . "' />\n";
3523: $result .= "<input type='hidden' name='pres_value' " .
3524: "value='" . $vars->{PARM_DATE} . "' />\n";
3525: $result .= "<input type='hidden' name='pres_type' " .
3526: "value='date_start' />\n";
1.38 bowersj2 3527: } elsif ($vars->{ACTION_TYPE} eq 'tries') {
3528: $result .= "<input type='hidden' name='pres_value' " .
3529: "value='" . $vars->{TRIES} . "' />\n";
1.104 albertel 3530: $result .= "<input type='hidden' name='pres_type' " .
3531: "value='int_pos' />\n";
1.48 bowersj2 3532: } elsif ($vars->{ACTION_TYPE} eq 'weight') {
3533: $result .= "<input type='hidden' name='pres_value' " .
3534: "value='" . $vars->{WEIGHT} . "' />\n";
1.38 bowersj2 3535: }
1.27 bowersj2 3536:
3537: $result .= $resourceString;
3538:
1.13 bowersj2 3539: # Print targets
3540: if ($vars->{TARGETS} eq 'course') {
1.76 sakharuk 3541: $result .= '<li>'.&mt('for <b>all students in course</b>').'</li>';
1.13 bowersj2 3542: } elsif ($vars->{TARGETS} eq 'section') {
3543: my $section = $vars->{SECTION_NAME};
1.79 sakharuk 3544: $result .= '<li>'.&mt('for section [_1]',"<b>$section</b>").'</li>';
1.104 albertel 3545: $result .= "<input type='hidden' name='csec' value='" .
1.89 foxr 3546: HTML::Entities::encode($section,"'<>&\"") . "' />\n";
1.13 bowersj2 3547: } else {
3548: # FIXME: This is probably wasteful! Store the name!
3549: my $classlist = Apache::loncoursedata::get_classlist();
1.109 albertel 3550: my ($uname,$udom)=split(':',$vars->{USER_NAME});
1.106 albertel 3551: my $name = $classlist->{$uname.':'.$udom}->[6];
1.79 sakharuk 3552: $result .= '<li>'.&mt('for [_1]',"<b>$name</b>").'</li>';
1.13 bowersj2 3553: $result .= "<input type='hidden' name='uname' value='".
1.89 foxr 3554: HTML::Entities::encode($uname,"'<>&\"") . "' />\n";
1.13 bowersj2 3555: $result .= "<input type='hidden' name='udom' value='".
1.89 foxr 3556: HTML::Entities::encode($udom,"'<>&\"") . "' />\n";
1.13 bowersj2 3557: }
3558:
3559: # Print value
1.48 bowersj2 3560: if ($vars->{ACTION_TYPE} ne 'tries' && $vars->{ACTION_TYPE} ne 'weight') {
1.81 sakharuk 3561: $result .= '<li>'.&mt('to [_1] ([_2])',"<b>".ctime($vars->{PARM_DATE})."</b>",Apache::lonnavmaps::timeToHumanString($vars->{PARM_DATE}))."</li>\n";
1.38 bowersj2 3562: }
3563:
1.13 bowersj2 3564: # print pres_marker
3565: $result .= "\n<input type='hidden' name='pres_marker'" .
3566: " value='$affectedResourceId&$parm_name&$level' />\n";
1.27 bowersj2 3567:
3568: # Make the table appear
3569: $result .= "\n<input type='hidden' value='true' name='prevvisit' />";
3570: $result .= "\n<input type='hidden' value='$symb' name='pssymb' />";
3571: $result .= "\n<input type='hidden' value='$paramlevel' name='parmlev' />";
1.13 bowersj2 3572:
1.71 sakharuk 3573: $result .= "<br /><br /><center><input type='submit' value='".&mt('Finish Helper')."' /></center></form>\n";
1.13 bowersj2 3574:
3575: return $result;
3576: }
3577:
3578: sub overrideForm {
3579: return 1;
3580: }
1.5 bowersj2 3581:
1.4 bowersj2 3582: 1;
1.3 bowersj2 3583:
1.1 bowersj2 3584: __END__
1.3 bowersj2 3585:
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