Annotation of loncom/interface/lonhelper.pm, revision 1.131
1.1 bowersj2 1: # The LearningOnline Network with CAPA
2: # .helper XML handler to implement the LON-CAPA helper
3: #
1.131 ! foxr 4: # $Id: lonhelper.pm,v 1.130 2006/01/24 22:20:19 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});
1.129 albertel 579: my $browser_searcher_js = &Apache::loncommon::browser_and_searcher_javascript();
1.57 albertel 580: my $bodytag = &Apache::loncommon::bodytag($helperTitle,'','');
581: my $previous = HTML::Entities::encode(&mt("<- Previous"), '<>&"');
582: my $next = HTML::Entities::encode(&mt("Next ->"), '<>&"');
583: # FIXME: This should be parameterized, not concatenated - Jeremy
584: my $loncapaHelper = &mt("LON-CAPA Helper:");
1.3 bowersj2 585:
586: $result .= <<HEADER;
1.96 albertel 587: $html
1.3 bowersj2 588: <head>
1.57 albertel 589: <title>$loncapaHelper: $helperTitle</title>
1.129 albertel 590: <script type="text/javascript">
591: $browser_searcher_js
592: </script>
1.3 bowersj2 593: </head>
594: $bodytag
595: HEADER
1.28 bowersj2 596: if (!$state->overrideForm()) { $result.="<form name='helpform' method='POST'>"; }
1.3 bowersj2 597: $result .= <<HEADER;
1.31 bowersj2 598: <table border="0" width='100%'><tr><td>
1.3 bowersj2 599: <h2><i>$stateTitle</i></h2>
600: HEADER
601:
1.31 bowersj2 602: $result .= "<table cellpadding='10' width='100%'><tr><td rowspan='2' valign='top'>";
1.30 bowersj2 603:
1.3 bowersj2 604: if (!$state->overrideForm()) {
605: $result .= $self->_saveVars();
606: }
1.30 bowersj2 607: $result .= $state->render();
608:
1.31 bowersj2 609: $result .= "</td><td valign='top' align='right'>";
1.3 bowersj2 610:
1.30 bowersj2 611: # Warning: Copy and pasted from below, because it's too much trouble to
612: # turn this into a subroutine
1.3 bowersj2 613: if (!$state->overrideForm()) {
614: if ($self->{STATE} ne $self->{START_STATE}) {
615: #$result .= '<input name="SUBMIT" type="submit" value="<- Previous" /> ';
616: }
617: if ($self->{DONE}) {
618: my $returnPage = $self->{RETURN_PAGE};
1.57 albertel 619: $result .= "<a href=\"$returnPage\">" . &mt("End Helper") . "</a>";
1.3 bowersj2 620: }
621: else {
1.30 bowersj2 622: $result .= '<nobr><input name="back" type="button" ';
1.57 albertel 623: $result .= 'value="' . $previous . '" onclick="history.go(-1)" /> ';
624: $result .= '<input name="SUBMIT" type="submit" value="' . $next . '" /></nobr>';
1.30 bowersj2 625: }
626: }
627:
1.31 bowersj2 628: $result .= "</td></tr><tr><td valign='bottom' align='right'>";
1.30 bowersj2 629:
630: # Warning: Copy and pasted from above, because it's too much trouble to
631: # turn this into a subroutine
632: if (!$state->overrideForm()) {
633: if ($self->{STATE} ne $self->{START_STATE}) {
634: #$result .= '<input name="SUBMIT" type="submit" value="<- Previous" /> ';
635: }
636: if ($self->{DONE}) {
637: my $returnPage = $self->{RETURN_PAGE};
1.57 albertel 638: $result .= "<a href=\"$returnPage\">" . &mt('End Helper') . "</a>";
1.30 bowersj2 639: }
640: else {
641: $result .= '<nobr><input name="back" type="button" ';
1.57 albertel 642: $result .= 'value="' . $previous . '" onclick="history.go(-1)" /> ';
643: $result .= '<input name="SUBMIT" type="submit" value="' . $next . '" /></nobr>';
1.3 bowersj2 644: }
645: }
646:
1.13 bowersj2 647: #foreach my $key (keys %{$self->{VARS}}) {
648: # $result .= "|$key| -> " . $self->{VARS}->{$key} . "<br />";
649: #}
1.5 bowersj2 650:
1.30 bowersj2 651: $result .= "</td></tr></table>";
652:
1.3 bowersj2 653: $result .= <<FOOTER;
654: </td>
655: </tr>
656: </table>
657: </form>
658: </body>
659: </html>
660: FOOTER
661:
662: # Handle writing out the vars to the file
663: my $file = Apache::File->new('>'.$self->{FILENAME});
1.33 bowersj2 664: print $file $self->_varsInFile();
1.3 bowersj2 665:
666: return $result;
667: }
668:
669: 1;
670:
671: package Apache::lonhelper::state;
672:
673: # States bundle things together and are responsible for compositing the
1.4 bowersj2 674: # various elements together. It is not generally necessary for users to
675: # use the state object directly, so it is not perldoc'ed.
676:
677: # Basically, all the states do is pass calls to the elements and aggregate
678: # the results.
1.3 bowersj2 679:
680: sub new {
681: my $proto = shift;
682: my $class = ref($proto) || $proto;
683: my $self = {};
684:
685: $self->{NAME} = shift;
686: $self->{TITLE} = shift;
687: $self->{ELEMENTS} = [];
688:
689: bless($self, $class);
690:
691: $helper->registerState($self);
692:
1.13 bowersj2 693: $state = $self;
694:
1.3 bowersj2 695: return $self;
696: }
697:
698: sub name {
699: my $self = shift;
700: return $self->{NAME};
701: }
702:
703: sub title {
704: my $self = shift;
705: return $self->{TITLE};
706: }
707:
1.4 bowersj2 708: sub preprocess {
709: my $self = shift;
710: for my $element (@{$self->{ELEMENTS}}) {
711: $element->preprocess();
712: }
713: }
714:
1.6 bowersj2 715: # FIXME: Document that all postprocesses must return a true value or
716: # the state transition will be overridden
1.4 bowersj2 717: sub postprocess {
718: my $self = shift;
1.6 bowersj2 719:
720: # Save the state so we can roll it back if we need to.
721: my $originalState = $helper->{STATE};
722: my $everythingSuccessful = 1;
723:
1.4 bowersj2 724: for my $element (@{$self->{ELEMENTS}}) {
1.6 bowersj2 725: my $result = $element->postprocess();
726: if (!$result) { $everythingSuccessful = 0; }
727: }
728:
729: # If not all the postprocesses were successful, override
730: # any state transitions that may have occurred. It is the
731: # responsibility of the states to make sure they have
732: # error handling in that case.
733: if (!$everythingSuccessful) {
734: $helper->{STATE} = $originalState;
1.4 bowersj2 735: }
736: }
737:
1.13 bowersj2 738: # Override the form if any element wants to.
739: # two elements overriding the form will make a mess, but that should
740: # be considered helper author error ;-)
1.4 bowersj2 741: sub overrideForm {
1.13 bowersj2 742: my $self = shift;
743: for my $element (@{$self->{ELEMENTS}}) {
744: if ($element->overrideForm()) {
745: return 1;
746: }
747: }
1.4 bowersj2 748: return 0;
749: }
750:
751: sub addElement {
752: my $self = shift;
753: my $element = shift;
754:
755: push @{$self->{ELEMENTS}}, $element;
756: }
757:
758: sub render {
759: my $self = shift;
760: my @results = ();
761:
762: for my $element (@{$self->{ELEMENTS}}) {
763: push @results, $element->render();
764: }
1.28 bowersj2 765:
1.4 bowersj2 766: return join("\n", @results);
767: }
768:
769: 1;
770:
771: package Apache::lonhelper::element;
772: # Support code for elements
773:
774: =pod
775:
1.44 bowersj2 776: =head1 Element Base Class
1.4 bowersj2 777:
1.28 bowersj2 778: The Apache::lonhelper::element base class provides support for elements
779: and defines some generally useful tags for use in elements.
1.4 bowersj2 780:
1.44 bowersj2 781: =head2 finalcode tagX<finalcode>
1.25 bowersj2 782:
783: Each element can contain a "finalcode" tag that, when the special FINAL
784: helper state is used, will be executed, surrounded by "sub { my $helper = shift;"
785: and "}". It is expected to return a string describing what it did, which
786: may be an empty string. See course initialization helper for an example. This is
787: generally intended for helpers like the course initialization helper, which consist
788: of several panels, each of which is performing some sort of bite-sized functionality.
789:
1.44 bowersj2 790: =head2 defaultvalue tagX<defaultvalue>
1.25 bowersj2 791:
792: Each element that accepts user input can contain a "defaultvalue" tag that,
793: when surrounded by "sub { my $helper = shift; my $state = shift; " and "}",
794: will form a subroutine that when called will provide a default value for
795: the element. How this value is interpreted by the element is specific to
796: the element itself, and possibly the settings the element has (such as
797: multichoice vs. single choice for <choices> tags).
798:
799: This is also intended for things like the course initialization wizard, where the
800: user is setting various parameters. By correctly grabbing current settings
801: and including them into the helper, it allows the user to come back to the
802: helper later and re-execute it, without needing to worry about overwriting
803: some setting accidentally.
804:
805: Again, see the course initialization helper for examples.
806:
1.44 bowersj2 807: =head2 validator tagX<validator>
1.38 bowersj2 808:
809: Some elements that accepts user input can contain a "validator" tag that,
810: when surrounded by "sub { my $helper = shift; my $state = shift; my $element = shift; my $val = shift "
811: and "}", where "$val" is the value the user entered, will form a subroutine
812: that when called will verify whether the given input is valid or not. If it
813: is valid, the routine will return a false value. If invalid, the routine
814: will return an error message to be displayed for the user.
815:
816: Consult the documentation for each element to see whether it supports this
817: tag.
818:
1.44 bowersj2 819: =head2 getValue methodX<getValue (helper elements)>
1.31 bowersj2 820:
821: If the element stores the name of the variable in a 'variable' member, which
822: the provided ones all do, you can retreive the value of the variable by calling
823: this method.
824:
1.4 bowersj2 825: =cut
826:
1.5 bowersj2 827: BEGIN {
1.7 bowersj2 828: &Apache::lonhelper::register('Apache::lonhelper::element',
1.25 bowersj2 829: ('nextstate', 'finalcode',
1.38 bowersj2 830: 'defaultvalue', 'validator'));
1.5 bowersj2 831: }
832:
1.4 bowersj2 833: # Because we use the param hash, this is often a sufficent
834: # constructor
835: sub new {
836: my $proto = shift;
837: my $class = ref($proto) || $proto;
838: my $self = $paramHash;
839: bless($self, $class);
840:
841: $self->{PARAMS} = $paramHash;
842: $self->{STATE} = $state;
843: $state->addElement($self);
844:
845: # Ensure param hash is not reused
846: $paramHash = {};
847:
848: return $self;
849: }
850:
1.5 bowersj2 851: sub start_nextstate {
852: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
853:
854: if ($target ne 'helper') {
855: return '';
856: }
857:
858: $paramHash->{NEXTSTATE} = &Apache::lonxml::get_all_text('/nextstate',
859: $parser);
860: return '';
861: }
862:
863: sub end_nextstate { return ''; }
864:
1.25 bowersj2 865: sub start_finalcode {
866: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
867:
868: if ($target ne 'helper') {
869: return '';
870: }
871:
872: $paramHash->{FINAL_CODE} = &Apache::lonxml::get_all_text('/finalcode',
873: $parser);
874: return '';
875: }
876:
877: sub end_finalcode { return ''; }
878:
879: sub start_defaultvalue {
880: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
881:
882: if ($target ne 'helper') {
883: return '';
884: }
885:
886: $paramHash->{DEFAULT_VALUE} = &Apache::lonxml::get_all_text('/defaultvalue',
887: $parser);
888: $paramHash->{DEFAULT_VALUE} = 'sub { my $helper = shift; my $state = shift;' .
889: $paramHash->{DEFAULT_VALUE} . '}';
890: return '';
891: }
892:
893: sub end_defaultvalue { return ''; }
894:
1.57 albertel 895: # Validators may need to take language specifications
1.38 bowersj2 896: sub start_validator {
897: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
898:
899: if ($target ne 'helper') {
900: return '';
901: }
902:
903: $paramHash->{VALIDATOR} = &Apache::lonxml::get_all_text('/validator',
904: $parser);
905: $paramHash->{VALIDATOR} = 'sub { my $helper = shift; my $state = shift; my $element = shift; my $val = shift;' .
906: $paramHash->{VALIDATOR} . '}';
907: return '';
908: }
909:
910: sub end_validator { return ''; }
911:
1.4 bowersj2 912: sub preprocess {
913: return 1;
914: }
915:
916: sub postprocess {
917: return 1;
918: }
919:
920: sub render {
921: return '';
922: }
923:
1.13 bowersj2 924: sub overrideForm {
925: return 0;
926: }
927:
1.31 bowersj2 928: sub getValue {
929: my $self = shift;
930: return $helper->{VARS}->{$self->{'variable'}};
931: }
932:
1.4 bowersj2 933: 1;
934:
935: package Apache::lonhelper::message;
936:
937: =pod
938:
1.48 bowersj2 939: =head1 Elements
940:
941: =head2 Element: messageX<message, helper element>
1.4 bowersj2 942:
1.44 bowersj2 943: Message elements display their contents, and
944: transition directly to the state in the <nextstate> attribute. Example:
1.4 bowersj2 945:
1.44 bowersj2 946: <message nextstate='GET_NAME'>
947: This is the <b>message</b> the user will see,
948: <i>HTML allowed</i>.
1.4 bowersj2 949: </message>
950:
1.44 bowersj2 951: This will display the HTML message and transition to the 'nextstate' if
1.7 bowersj2 952: given. The HTML will be directly inserted into the helper, so if you don't
1.44 bowersj2 953: want text to run together, you'll need to manually wrap the message text
1.4 bowersj2 954: in <p> tags, or whatever is appropriate for your HTML.
955:
1.5 bowersj2 956: Message tags do not add in whitespace, so if you want it, you'll need to add
957: it into states. This is done so you can inline some elements, such as
958: the <date> element, right between two messages, giving the appearence that
959: the <date> element appears inline. (Note the elements can not be embedded
960: within each other.)
961:
1.4 bowersj2 962: This is also a good template for creating your own new states, as it has
963: very little code beyond the state template.
964:
1.57 albertel 965: =head3 Localization
966:
967: The contents of the message tag will be run through the
968: normalize_string function and that will be used as a call to &mt.
969:
1.4 bowersj2 970: =cut
971:
972: no strict;
973: @ISA = ("Apache::lonhelper::element");
974: use strict;
1.57 albertel 975: use Apache::lonlocal;
1.4 bowersj2 976:
977: BEGIN {
1.7 bowersj2 978: &Apache::lonhelper::register('Apache::lonhelper::message',
1.10 bowersj2 979: ('message'));
1.3 bowersj2 980: }
981:
1.5 bowersj2 982: sub new {
983: my $ref = Apache::lonhelper::element->new();
984: bless($ref);
985: }
1.4 bowersj2 986:
987: # CONSTRUCTION: Construct the message element from the XML
988: sub start_message {
989: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
990:
991: if ($target ne 'helper') {
992: return '';
993: }
1.10 bowersj2 994:
1.69 sakharuk 995: $paramHash->{MESSAGE_TEXT} = &mtn(&Apache::lonxml::get_all_text('/message',
996: $parser));
1.10 bowersj2 997:
998: if (defined($token->[2]{'nextstate'})) {
999: $paramHash->{NEXTSTATE} = $token->[2]{'nextstate'};
1000: }
1.4 bowersj2 1001: return '';
1.3 bowersj2 1002: }
1003:
1.10 bowersj2 1004: sub end_message {
1.4 bowersj2 1005: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1006:
1007: if ($target ne 'helper') {
1008: return '';
1009: }
1.10 bowersj2 1010: Apache::lonhelper::message->new();
1011: return '';
1.5 bowersj2 1012: }
1013:
1014: sub render {
1015: my $self = shift;
1016:
1.57 albertel 1017: return &mtn($self->{MESSAGE_TEXT});
1.5 bowersj2 1018: }
1019: # If a NEXTSTATE was given, switch to it
1020: sub postprocess {
1021: my $self = shift;
1022: if (defined($self->{NEXTSTATE})) {
1023: $helper->changeState($self->{NEXTSTATE});
1024: }
1.6 bowersj2 1025:
1026: return 1;
1.5 bowersj2 1027: }
1028: 1;
1029:
1030: package Apache::lonhelper::choices;
1031:
1032: =pod
1033:
1.44 bowersj2 1034: =head2 Element: choicesX<choices, helper element>
1.5 bowersj2 1035:
1036: Choice states provide a single choice to the user as a text selection box.
1037: A "choice" is two pieces of text, one which will be displayed to the user
1038: (the "human" value), and one which will be passed back to the program
1039: (the "computer" value). For instance, a human may choose from a list of
1040: resources on disk by title, while your program wants the file name.
1041:
1042: <choices> takes an attribute "variable" to control which helper variable
1043: the result is stored in.
1044:
1045: <choices> takes an attribute "multichoice" which, if set to a true
1046: value, will allow the user to select multiple choices.
1047:
1.26 bowersj2 1048: <choices> takes an attribute "allowempty" which, if set to a true
1049: value, will allow the user to select none of the choices without raising
1050: an error message.
1051:
1.44 bowersj2 1052: =head3 SUB-TAGS
1.5 bowersj2 1053:
1.44 bowersj2 1054: <choices> can have the following subtags:X<choice, helper tag>
1.5 bowersj2 1055:
1056: =over 4
1057:
1058: =item * <nextstate>state_name</nextstate>: If given, this will cause the
1.44 bowersj2 1059: choice element to transition to the given state after executing.
1060: This will override the <nextstate> passed to <choices> (if any).
1.5 bowersj2 1061:
1062: =item * <choice />: If the choices are static,
1063: this element will allow you to specify them. Each choice
1064: contains attribute, "computer", as described above. The
1065: content of the tag will be used as the human label.
1066: For example,
1067: <choice computer='234-12-7312'>Bobby McDormik</choice>.
1068:
1.44 bowersj2 1069: <choice> can take a parameter "eval", which if set to
1070: a true value, will cause the contents of the tag to be
1071: evaluated as it would be in an <eval> tag; see <eval> tag
1072: below.
1.13 bowersj2 1073:
1.5 bowersj2 1074: <choice> may optionally contain a 'nextstate' attribute, which
1.44 bowersj2 1075: will be the state transistioned to if the choice is made, if
1076: the choice is not multichoice. This will override the nextstate
1077: passed to the parent C<choices> tag.
1.5 bowersj2 1078:
1079: =back
1080:
1081: To create the choices programmatically, either wrap the choices in
1082: <condition> tags (prefered), or use an <exec> block inside the <choice>
1083: tag. Store the choices in $state->{CHOICES}, which is a list of list
1084: references, where each list has three strings. The first is the human
1085: name, the second is the computer name. and the third is the option
1086: next state. For example:
1087:
1088: <exec>
1089: for (my $i = 65; $i < 65 + 26; $i++) {
1090: push @{$state->{CHOICES}}, [chr($i), $i, 'next'];
1091: }
1092: </exec>
1093:
1094: This will allow the user to select from the letters A-Z (in ASCII), while
1095: passing the ASCII value back into the helper variables, and the state
1096: will in all cases transition to 'next'.
1097:
1098: You can mix and match methods of creating choices, as long as you always
1099: "push" onto the choice list, rather then wiping it out. (You can even
1100: remove choices programmatically, but that would probably be bad form.)
1101:
1.44 bowersj2 1102: =head3 defaultvalue support
1.25 bowersj2 1103:
1104: Choices supports default values both in multichoice and single choice mode.
1105: In single choice mode, have the defaultvalue tag's function return the
1106: computer value of the box you want checked. If the function returns a value
1107: that does not correspond to any of the choices, the default behavior of selecting
1108: the first choice will be preserved.
1109:
1110: For multichoice, return a string with the computer values you want checked,
1111: delimited by triple pipes. Note this matches how the result of the <choices>
1112: tag is stored in the {VARS} hash.
1113:
1.5 bowersj2 1114: =cut
1115:
1116: no strict;
1117: @ISA = ("Apache::lonhelper::element");
1118: use strict;
1.57 albertel 1119: use Apache::lonlocal;
1.100 albertel 1120: use Apache::lonnet;
1.5 bowersj2 1121:
1122: BEGIN {
1.7 bowersj2 1123: &Apache::lonhelper::register('Apache::lonhelper::choices',
1.5 bowersj2 1124: ('choice', 'choices'));
1125: }
1126:
1127: sub new {
1128: my $ref = Apache::lonhelper::element->new();
1129: bless($ref);
1130: }
1131:
1132: # CONSTRUCTION: Construct the message element from the XML
1133: sub start_choices {
1134: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1135:
1136: if ($target ne 'helper') {
1137: return '';
1138: }
1139:
1140: # Need to initialize the choices list, so everything can assume it exists
1.24 sakharuk 1141: $paramHash->{'variable'} = $token->[2]{'variable'} if (!defined($paramHash->{'variable'}));
1.5 bowersj2 1142: $helper->declareVar($paramHash->{'variable'});
1143: $paramHash->{'multichoice'} = $token->[2]{'multichoice'};
1.26 bowersj2 1144: $paramHash->{'allowempty'} = $token->[2]{'allowempty'};
1.5 bowersj2 1145: $paramHash->{CHOICES} = [];
1146: return '';
1147: }
1148:
1149: sub end_choices {
1150: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1151:
1152: if ($target ne 'helper') {
1153: return '';
1154: }
1155: Apache::lonhelper::choices->new();
1156: return '';
1157: }
1158:
1159: sub start_choice {
1160: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1161:
1162: if ($target ne 'helper') {
1163: return '';
1164: }
1165:
1166: my $computer = $token->[2]{'computer'};
1.69 sakharuk 1167: my $human = &mt(&Apache::lonxml::get_all_text('/choice',
1168: $parser));
1.5 bowersj2 1169: my $nextstate = $token->[2]{'nextstate'};
1.13 bowersj2 1170: my $evalFlag = $token->[2]{'eval'};
1.94 albertel 1171: push @{$paramHash->{CHOICES}}, [&mtn($human), $computer, $nextstate,
1.13 bowersj2 1172: $evalFlag];
1.5 bowersj2 1173: return '';
1174: }
1175:
1176: sub end_choice {
1177: return '';
1178: }
1179:
1.87 matthew 1180: {
1181: # used to generate unique id attributes for <input> tags.
1182: # internal use only.
1183: my $id = 0;
1184: sub new_id { return $id++; }
1185: }
1186:
1.5 bowersj2 1187: sub render {
1188: my $self = shift;
1189: my $var = $self->{'variable'};
1190: my $buttons = '';
1191: my $result = '';
1192:
1193: if ($self->{'multichoice'}) {
1.6 bowersj2 1194: $result .= <<SCRIPT;
1.112 albertel 1195: <script type="text/javascript">
1196: // <!--
1.18 bowersj2 1197: function checkall(value, checkName) {
1.15 bowersj2 1198: for (i=0; i<document.forms.helpform.elements.length; i++) {
1.18 bowersj2 1199: ele = document.forms.helpform.elements[i];
1200: if (ele.name == checkName + '.forminput') {
1201: document.forms.helpform.elements[i].checked=value;
1202: }
1.5 bowersj2 1203: }
1204: }
1.112 albertel 1205: // -->
1.5 bowersj2 1206: </script>
1207: SCRIPT
1.25 bowersj2 1208: }
1209:
1210: # Only print "select all" and "unselect all" if there are five or
1211: # more choices; fewer then that and it looks silly.
1212: if ($self->{'multichoice'} && scalar(@{$self->{CHOICES}}) > 4) {
1.68 sakharuk 1213: my %lt=&Apache::lonlocal::texthash(
1214: 'sa' => "Select All",
1215: 'ua' => "Unselect All");
1.5 bowersj2 1216: $buttons = <<BUTTONS;
1217: <br />
1.68 sakharuk 1218: <input type="button" onclick="checkall(true, '$var')" value="$lt{'sa'}" />
1219: <input type="button" onclick="checkall(false, '$var')" value="$lt{'ua'}" />
1.6 bowersj2 1220: <br />
1.5 bowersj2 1221: BUTTONS
1222: }
1223:
1.16 bowersj2 1224: if (defined $self->{ERROR_MSG}) {
1.6 bowersj2 1225: $result .= '<br /><font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br />';
1.5 bowersj2 1226: }
1227:
1228: $result .= $buttons;
1.6 bowersj2 1229:
1.5 bowersj2 1230: $result .= "<table>\n\n";
1231:
1.25 bowersj2 1232: my %checkedChoices;
1233: my $checkedChoicesFunc;
1234:
1235: if (defined($self->{DEFAULT_VALUE})) {
1236: $checkedChoicesFunc = eval ($self->{DEFAULT_VALUE});
1237: die 'Error in default value code for variable ' .
1.34 bowersj2 1238: $self->{'variable'} . ', Perl said: ' . $@ if $@;
1.25 bowersj2 1239: } else {
1240: $checkedChoicesFunc = sub { return ''; };
1241: }
1242:
1243: # Process which choices should be checked.
1244: if ($self->{'multichoice'}) {
1245: for my $selectedChoice (split(/\|\|\|/, (&$checkedChoicesFunc($helper, $self)))) {
1246: $checkedChoices{$selectedChoice} = 1;
1247: }
1248: } else {
1249: # single choice
1250: my $selectedChoice = &$checkedChoicesFunc($helper, $self);
1251:
1252: my $foundChoice = 0;
1253:
1254: # check that the choice is in the list of choices.
1255: for my $choice (@{$self->{CHOICES}}) {
1256: if ($choice->[1] eq $selectedChoice) {
1257: $checkedChoices{$choice->[1]} = 1;
1258: $foundChoice = 1;
1259: }
1260: }
1261:
1262: # If we couldn't find the choice, pick the first one
1263: if (!$foundChoice) {
1264: $checkedChoices{$self->{CHOICES}->[0]->[1]} = 1;
1265: }
1266: }
1267:
1.5 bowersj2 1268: my $type = "radio";
1269: if ($self->{'multichoice'}) { $type = 'checkbox'; }
1270: foreach my $choice (@{$self->{CHOICES}}) {
1.87 matthew 1271: my $id = &new_id();
1.5 bowersj2 1272: $result .= "<tr>\n<td width='20'> </td>\n";
1273: $result .= "<td valign='top'><input type='$type' name='$var.forminput'"
1.111 albertel 1274: . " value='" .
1.89 foxr 1275: HTML::Entities::encode($choice->[1],"<>&\"'")
1.5 bowersj2 1276: . "'";
1.25 bowersj2 1277: if ($checkedChoices{$choice->[1]}) {
1.111 albertel 1278: $result .= " checked='checked' ";
1.5 bowersj2 1279: }
1.111 albertel 1280: $result .= qq{id="id$id"};
1.13 bowersj2 1281: my $choiceLabel = $choice->[0];
1282: if ($choice->[4]) { # if we need to evaluate this choice
1283: $choiceLabel = "sub { my $helper = shift; my $state = shift;" .
1284: $choiceLabel . "}";
1285: $choiceLabel = eval($choiceLabel);
1286: $choiceLabel = &$choiceLabel($helper, $self);
1287: }
1.111 albertel 1288: $result .= "/></td><td> ".qq{<label for="id$id">}.
1.94 albertel 1289: $choiceLabel. "</label></td></tr>\n";
1.5 bowersj2 1290: }
1291: $result .= "</table>\n\n\n";
1292: $result .= $buttons;
1293:
1294: return $result;
1295: }
1296:
1297: # If a NEXTSTATE was given or a nextstate for this choice was
1298: # given, switch to it
1299: sub postprocess {
1300: my $self = shift;
1.100 albertel 1301: my $chosenValue = $env{'form.' . $self->{'variable'} . '.forminput'};
1.5 bowersj2 1302:
1.26 bowersj2 1303: if (!defined($chosenValue) && !$self->{'allowempty'}) {
1.59 bowersj2 1304: $self->{ERROR_MSG} =
1305: &mt("You must choose one or more choices to continue.");
1.6 bowersj2 1306: return 0;
1307: }
1308:
1.28 bowersj2 1309: if (ref($chosenValue)) {
1310: $helper->{VARS}->{$self->{'variable'}} = join('|||', @$chosenValue);
1.42 bowersj2 1311: }
1312:
1313: if (defined($self->{NEXTSTATE})) {
1314: $helper->changeState($self->{NEXTSTATE});
1315: }
1316:
1317: foreach my $choice (@{$self->{CHOICES}}) {
1318: if ($choice->[1] eq $chosenValue) {
1319: if (defined($choice->[2])) {
1320: $helper->changeState($choice->[2]);
1321: }
1322: }
1323: }
1324: return 1;
1325: }
1326: 1;
1327:
1328: package Apache::lonhelper::dropdown;
1329:
1330: =pod
1331:
1.44 bowersj2 1332: =head2 Element: dropdownX<dropdown, helper tag>
1.42 bowersj2 1333:
1334: A drop-down provides a drop-down box instead of a radio button
1335: box. Because most people do not know how to use a multi-select
1336: drop-down box, that option is not allowed. Otherwise, the arguments
1337: are the same as "choices", except "allowempty" is also meaningless.
1338:
1339: <dropdown> takes an attribute "variable" to control which helper variable
1340: the result is stored in.
1341:
1.44 bowersj2 1342: =head3 SUB-TAGS
1.42 bowersj2 1343:
1344: <choice>, which acts just as it does in the "choices" element.
1345:
1346: =cut
1347:
1.57 albertel 1348: # This really ought to be a sibling class to "choice" which is itself
1349: # a child of some abstract class.... *shrug*
1350:
1.42 bowersj2 1351: no strict;
1352: @ISA = ("Apache::lonhelper::element");
1353: use strict;
1.57 albertel 1354: use Apache::lonlocal;
1.100 albertel 1355: use Apache::lonnet;
1.42 bowersj2 1356:
1357: BEGIN {
1358: &Apache::lonhelper::register('Apache::lonhelper::dropdown',
1359: ('dropdown'));
1360: }
1361:
1362: sub new {
1363: my $ref = Apache::lonhelper::element->new();
1364: bless($ref);
1365: }
1366:
1367: # CONSTRUCTION: Construct the message element from the XML
1368: sub start_dropdown {
1369: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1370:
1371: if ($target ne 'helper') {
1372: return '';
1373: }
1374:
1375: # Need to initialize the choices list, so everything can assume it exists
1376: $paramHash->{'variable'} = $token->[2]{'variable'} if (!defined($paramHash->{'variable'}));
1377: $helper->declareVar($paramHash->{'variable'});
1378: $paramHash->{CHOICES} = [];
1379: return '';
1380: }
1381:
1382: sub end_dropdown {
1383: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1384:
1385: if ($target ne 'helper') {
1386: return '';
1387: }
1388: Apache::lonhelper::dropdown->new();
1389: return '';
1390: }
1391:
1392: sub render {
1393: my $self = shift;
1394: my $var = $self->{'variable'};
1395: my $result = '';
1396:
1397: if (defined $self->{ERROR_MSG}) {
1398: $result .= '<br /><font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br />';
1399: }
1400:
1401: my %checkedChoices;
1402: my $checkedChoicesFunc;
1403:
1404: if (defined($self->{DEFAULT_VALUE})) {
1405: $checkedChoicesFunc = eval ($self->{DEFAULT_VALUE});
1406: die 'Error in default value code for variable ' .
1407: $self->{'variable'} . ', Perl said: ' . $@ if $@;
1408: } else {
1409: $checkedChoicesFunc = sub { return ''; };
1410: }
1411:
1412: # single choice
1413: my $selectedChoice = &$checkedChoicesFunc($helper, $self);
1414:
1415: my $foundChoice = 0;
1416:
1417: # check that the choice is in the list of choices.
1418: for my $choice (@{$self->{CHOICES}}) {
1419: if ($choice->[1] eq $selectedChoice) {
1420: $checkedChoices{$choice->[1]} = 1;
1421: $foundChoice = 1;
1422: }
1423: }
1424:
1425: # If we couldn't find the choice, pick the first one
1426: if (!$foundChoice) {
1427: $checkedChoices{$self->{CHOICES}->[0]->[1]} = 1;
1428: }
1429:
1430: $result .= "<select name='${var}.forminput'>\n";
1431: foreach my $choice (@{$self->{CHOICES}}) {
1432: $result .= "<option value='" .
1.89 foxr 1433: HTML::Entities::encode($choice->[1],"<>&\"'")
1.42 bowersj2 1434: . "'";
1435: if ($checkedChoices{$choice->[1]}) {
1.111 albertel 1436: $result .= " selected='selected' ";
1.42 bowersj2 1437: }
1438: my $choiceLabel = $choice->[0];
1439: if ($choice->[4]) { # if we need to evaluate this choice
1440: $choiceLabel = "sub { my $helper = shift; my $state = shift;" .
1441: $choiceLabel . "}";
1442: $choiceLabel = eval($choiceLabel);
1443: $choiceLabel = &$choiceLabel($helper, $self);
1444: }
1.112 albertel 1445: $result .= ">" . &mtn($choiceLabel) . "</option>\n";
1.42 bowersj2 1446: }
1.43 bowersj2 1447: $result .= "</select>\n";
1.42 bowersj2 1448:
1449: return $result;
1450: }
1451:
1452: # If a NEXTSTATE was given or a nextstate for this choice was
1453: # given, switch to it
1454: sub postprocess {
1455: my $self = shift;
1.100 albertel 1456: my $chosenValue = $env{'form.' . $self->{'variable'} . '.forminput'};
1.42 bowersj2 1457:
1458: if (!defined($chosenValue) && !$self->{'allowempty'}) {
1459: $self->{ERROR_MSG} = "You must choose one or more choices to" .
1460: " continue.";
1461: return 0;
1.6 bowersj2 1462: }
1463:
1.5 bowersj2 1464: if (defined($self->{NEXTSTATE})) {
1465: $helper->changeState($self->{NEXTSTATE});
1466: }
1467:
1468: foreach my $choice (@{$self->{CHOICES}}) {
1469: if ($choice->[1] eq $chosenValue) {
1470: if (defined($choice->[2])) {
1471: $helper->changeState($choice->[2]);
1472: }
1473: }
1474: }
1.6 bowersj2 1475: return 1;
1.5 bowersj2 1476: }
1477: 1;
1478:
1479: package Apache::lonhelper::date;
1480:
1481: =pod
1482:
1.44 bowersj2 1483: =head2 Element: dateX<date, helper element>
1.5 bowersj2 1484:
1485: Date elements allow the selection of a date with a drop down list.
1486:
1487: Date elements can take two attributes:
1488:
1489: =over 4
1490:
1491: =item * B<variable>: The name of the variable to store the chosen
1492: date in. Required.
1493:
1494: =item * B<hoursminutes>: If a true value, the date will show hours
1495: and minutes, as well as month/day/year. If false or missing,
1496: the date will only show the month, day, and year.
1497:
1498: =back
1499:
1500: Date elements contain only an option <nextstate> tag to determine
1501: the next state.
1502:
1503: Example:
1504:
1505: <date variable="DUE_DATE" hoursminutes="1">
1506: <nextstate>choose_why</nextstate>
1507: </date>
1508:
1509: =cut
1510:
1511: no strict;
1512: @ISA = ("Apache::lonhelper::element");
1513: use strict;
1.57 albertel 1514: use Apache::lonlocal; # A localization nightmare
1.100 albertel 1515: use Apache::lonnet;
1.5 bowersj2 1516: use Time::localtime;
1517:
1518: BEGIN {
1.7 bowersj2 1519: &Apache::lonhelper::register('Apache::lonhelper::date',
1.5 bowersj2 1520: ('date'));
1521: }
1522:
1523: # Don't need to override the "new" from element
1524: sub new {
1525: my $ref = Apache::lonhelper::element->new();
1526: bless($ref);
1527: }
1528:
1529: my @months = ("January", "February", "March", "April", "May", "June", "July",
1530: "August", "September", "October", "November", "December");
1531:
1532: # CONSTRUCTION: Construct the message element from the XML
1533: sub start_date {
1534: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1535:
1536: if ($target ne 'helper') {
1537: return '';
1538: }
1539:
1540: $paramHash->{'variable'} = $token->[2]{'variable'};
1541: $helper->declareVar($paramHash->{'variable'});
1542: $paramHash->{'hoursminutes'} = $token->[2]{'hoursminutes'};
1.118 albertel 1543: $paramHash->{'anytime'} = $token->[2]{'anytime'};
1.5 bowersj2 1544: }
1545:
1546: sub end_date {
1547: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1548:
1549: if ($target ne 'helper') {
1550: return '';
1551: }
1552: Apache::lonhelper::date->new();
1553: return '';
1554: }
1555:
1556: sub render {
1557: my $self = shift;
1558: my $result = "";
1559: my $var = $self->{'variable'};
1560:
1561: my $date;
1.118 albertel 1562:
1563: my $time=time;
1.130 albertel 1564: $date = localtime($time);
1565: $date->min(0);
1.119 albertel 1566: my ($anytime,$onclick);
1.118 albertel 1567:
1568: if (defined($self->{DEFAULT_VALUE})) {
1569: my $valueFunc = eval($self->{DEFAULT_VALUE});
1570: die('Error in default value code for variable ' .
1571: $self->{'variable'} . ', Perl said: ' . $@) if $@;
1572: $time = &$valueFunc($helper, $self);
1.130 albertel 1573: if (lc($time) eq 'anytime') {
1574: $anytime=1;
1575: } else {
1576: $date = localtime($time);
1577: }
1578: } else {
1579:
1.118 albertel 1580: }
1.119 albertel 1581: if ($anytime) {
1582: $onclick = "onclick=\"javascript:updateCheck(this.form,'${var}anytime',false)\"";
1583: }
1.5 bowersj2 1584: # Default date: The current hour.
1585:
1586: if (defined $self->{ERROR_MSG}) {
1587: $result .= '<font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br /><br />';
1588: }
1589:
1590: # Month
1591: my $i;
1.119 albertel 1592: $result .= "<select $onclick name='${var}month'>\n";
1.5 bowersj2 1593: for ($i = 0; $i < 12; $i++) {
1594: if ($i == $date->mon) {
1.111 albertel 1595: $result .= "<option value='$i' selected='selected'>";
1.5 bowersj2 1596: } else {
1597: $result .= "<option value='$i'>";
1598: }
1.57 albertel 1599: $result .= &mt($months[$i]) . "</option>\n";
1.5 bowersj2 1600: }
1601: $result .= "</select>\n";
1602:
1603: # Day
1.119 albertel 1604: $result .= "<select $onclick name='${var}day'>\n";
1.5 bowersj2 1605: for ($i = 1; $i < 32; $i++) {
1606: if ($i == $date->mday) {
1.111 albertel 1607: $result .= '<option selected="selected">';
1.5 bowersj2 1608: } else {
1609: $result .= '<option>';
1610: }
1611: $result .= "$i</option>\n";
1612: }
1613: $result .= "</select>,\n";
1614:
1615: # Year
1.119 albertel 1616: $result .= "<select $onclick name='${var}year'>\n";
1.5 bowersj2 1617: for ($i = 2000; $i < 2030; $i++) { # update this after 64-bit dates
1618: if ($date->year + 1900 == $i) {
1.111 albertel 1619: $result .= "<option selected='selected'>";
1.5 bowersj2 1620: } else {
1621: $result .= "<option>";
1622: }
1623: $result .= "$i</option>\n";
1624: }
1625: $result .= "</select>,\n";
1626:
1627: # Display Hours and Minutes if they are called for
1628: if ($self->{'hoursminutes'}) {
1.59 bowersj2 1629: # This needs parameterization for times.
1630: my $am = &mt('a.m.');
1631: my $pm = &mt('p.m.');
1.5 bowersj2 1632: # Build hour
1.119 albertel 1633: $result .= "<select $onclick name='${var}hour'>\n";
1.111 albertel 1634: $result .= "<option " . ($date->hour == 0 ? 'selected="selected" ':'') .
1.59 bowersj2 1635: " value='0'>" . &mt('midnight') . "</option>\n";
1.5 bowersj2 1636: for ($i = 1; $i < 12; $i++) {
1637: if ($date->hour == $i) {
1.111 albertel 1638: $result .= "<option selected='selected' value='$i'>$i $am</option>\n";
1.5 bowersj2 1639: } else {
1.59 bowersj2 1640: $result .= "<option value='$i'>$i $am</option>\n";
1.5 bowersj2 1641: }
1642: }
1.111 albertel 1643: $result .= "<option " . ($date->hour == 12 ? 'selected="selected" ':'') .
1.59 bowersj2 1644: " value='12'>" . &mt('noon') . "</option>\n";
1.5 bowersj2 1645: for ($i = 13; $i < 24; $i++) {
1646: my $printedHour = $i - 12;
1647: if ($date->hour == $i) {
1.111 albertel 1648: $result .= "<option selected='selected' value='$i'>$printedHour $pm</option>\n";
1.5 bowersj2 1649: } else {
1.59 bowersj2 1650: $result .= "<option value='$i'>$printedHour $pm</option>\n";
1.5 bowersj2 1651: }
1652: }
1653:
1654: $result .= "</select> :\n";
1655:
1.119 albertel 1656: $result .= "<select $onclick name='${var}minute'>\n";
1.120 albertel 1657: my $selected=0;
1658: for my $i ((0,15,30,45,59,undef,0..59)) {
1.5 bowersj2 1659: my $printedMinute = $i;
1.117 albertel 1660: if (defined($i) && $i < 10) {
1.5 bowersj2 1661: $printedMinute = "0" . $printedMinute;
1662: }
1.120 albertel 1663: if (!$selected && $date->min == $i) {
1.111 albertel 1664: $result .= "<option selected='selected'>";
1.120 albertel 1665: $selected=1;
1.5 bowersj2 1666: } else {
1667: $result .= "<option>";
1668: }
1669: $result .= "$printedMinute</option>\n";
1670: }
1671: $result .= "</select>\n";
1672: }
1.118 albertel 1673: if ($self->{'anytime'}) {
1.121 albertel 1674: $result.=(<<CHECK);
1.119 albertel 1675: <script type="text/javascript">
1676: // <!--
1677: function updateCheck(form,name,value) {
1678: var checkbox=form[name];
1679: checkbox.checked = value;
1680: }
1681: // -->
1682: </script>
1683: CHECK
1.118 albertel 1684: $result.=" or <label><input type='checkbox' ";
1685: if ($anytime) {
1686: $result.=' checked="checked" '
1687: }
1688: $result.="name='${var}anytime'/>".&mt('Anytime').'</label>'
1689: }
1.5 bowersj2 1690: return $result;
1691:
1692: }
1693: # If a NEXTSTATE was given, switch to it
1694: sub postprocess {
1695: my $self = shift;
1696: my $var = $self->{'variable'};
1.118 albertel 1697: if ($env{'form.' . $var . 'anytime'}) {
1698: $helper->{VARS}->{$var} = undef;
1699: } else {
1700: my $month = $env{'form.' . $var . 'month'};
1701: my $day = $env{'form.' . $var . 'day'};
1702: my $year = $env{'form.' . $var . 'year'};
1703: my $min = 0;
1704: my $hour = 0;
1705: if ($self->{'hoursminutes'}) {
1706: $min = $env{'form.' . $var . 'minute'};
1707: $hour = $env{'form.' . $var . 'hour'};
1708: }
1709:
1710: my $chosenDate;
1711: eval {$chosenDate = Time::Local::timelocal(0, $min, $hour, $day, $month, $year);};
1712: my $error = $@;
1713:
1714: # Check to make sure that the date was not automatically co-erced into a
1715: # valid date, as we want to flag that as an error
1716: # This happens for "Feb. 31", for instance, which is coerced to March 2 or
1717: # 3, depending on if it's a leap year
1718: my $checkDate = localtime($chosenDate);
1719:
1720: if ($error || $checkDate->mon != $month || $checkDate->mday != $day ||
1721: $checkDate->year + 1900 != $year) {
1722: unless (Apache::lonlocal::current_language()== ~/^en/) {
1723: $self->{ERROR_MSG} = &mt("Invalid date entry");
1724: return 0;
1725: }
1726: # LOCALIZATION FIXME: Needs to be parameterized
1727: $self->{ERROR_MSG} = "Can't use " . $months[$month] . " $day, $year as a "
1728: . "date because it doesn't exist. Please enter a valid date.";
1.5 bowersj2 1729:
1.57 albertel 1730: return 0;
1731: }
1.118 albertel 1732: $helper->{VARS}->{$var} = $chosenDate;
1.5 bowersj2 1733: }
1734:
1735: if (defined($self->{NEXTSTATE})) {
1736: $helper->changeState($self->{NEXTSTATE});
1737: }
1.6 bowersj2 1738:
1739: return 1;
1.5 bowersj2 1740: }
1741: 1;
1742:
1743: package Apache::lonhelper::resource;
1744:
1745: =pod
1746:
1.44 bowersj2 1747: =head2 Element: resourceX<resource, helper element>
1.5 bowersj2 1748:
1749: <resource> elements allow the user to select one or multiple resources
1750: from the current course. You can filter out which resources they can view,
1751: and filter out which resources they can select. The course will always
1752: be displayed fully expanded, because of the difficulty of maintaining
1753: selections across folder openings and closings. If this is fixed, then
1754: the user can manipulate the folders.
1755:
1756: <resource> takes the standard variable attribute to control what helper
1.44 bowersj2 1757: variable stores the results. It also takes a "multichoice"X<multichoice> attribute,
1.17 bowersj2 1758: which controls whether the user can select more then one resource. The
1759: "toponly" attribute controls whether the resource display shows just the
1760: resources in that sequence, or recurses into all sub-sequences, defaulting
1.29 bowersj2 1761: to false. The "suppressEmptySequences" attribute reflects the
1762: suppressEmptySequences argument to the render routine, which will cause
1763: folders that have all of their contained resources filtered out to also
1.46 bowersj2 1764: be filtered out. The 'addstatus' attribute, if true, will add the icon
1.95 albertel 1765: and long status display columns to the display. The 'addparts'
1766: attribute will add in a part selector beside problems that have more
1767: than 1 part.
1.5 bowersj2 1768:
1.44 bowersj2 1769: =head3 SUB-TAGS
1.5 bowersj2 1770:
1771: =over 4
1772:
1.44 bowersj2 1773: =item * <filterfunc>X<filterfunc>: If you want to filter what resources are displayed
1.5 bowersj2 1774: to the user, use a filter func. The <filterfunc> tag should contain
1775: Perl code that when wrapped with "sub { my $res = shift; " and "}" is
1776: a function that returns true if the resource should be displayed,
1777: and false if it should be skipped. $res is a resource object.
1778: (See Apache::lonnavmaps documentation for information about the
1779: resource object.)
1780:
1.44 bowersj2 1781: =item * <choicefunc>X<choicefunc>: Same as <filterfunc>, except that controls whether
1.5 bowersj2 1782: the given resource can be chosen. (It is almost always a good idea to
1783: show the user the folders, for instance, but you do not always want to
1784: let the user select them.)
1785:
1786: =item * <nextstate>: Standard nextstate behavior.
1787:
1.44 bowersj2 1788: =item * <valuefunc>X<valuefunc>: This function controls what is returned by the resource
1.5 bowersj2 1789: when the user selects it. Like filterfunc and choicefunc, it should be
1790: a function fragment that when wrapped by "sub { my $res = shift; " and
1791: "}" returns a string representing what you want to have as the value. By
1792: default, the value will be the resource ID of the object ($res->{ID}).
1793:
1.44 bowersj2 1794: =item * <mapurl>X<mapurl>: If the URL of a map is given here, only that map
1.48 bowersj2 1795: will be displayed, instead of the whole course. If the attribute
1796: "evaluate" is given and is true, the contents of the mapurl will be
1797: evaluated with "sub { my $helper = shift; my $state = shift;" and
1798: "}", with the return value used as the mapurl.
1.13 bowersj2 1799:
1.5 bowersj2 1800: =back
1801:
1802: =cut
1803:
1804: no strict;
1805: @ISA = ("Apache::lonhelper::element");
1806: use strict;
1.100 albertel 1807: use Apache::lonnet;
1.5 bowersj2 1808:
1809: BEGIN {
1.7 bowersj2 1810: &Apache::lonhelper::register('Apache::lonhelper::resource',
1.5 bowersj2 1811: ('resource', 'filterfunc',
1.13 bowersj2 1812: 'choicefunc', 'valuefunc',
1.90 foxr 1813: 'mapurl','option'));
1.5 bowersj2 1814: }
1815:
1816: sub new {
1817: my $ref = Apache::lonhelper::element->new();
1818: bless($ref);
1819: }
1820:
1821: # CONSTRUCTION: Construct the message element from the XML
1822: sub start_resource {
1823: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1824:
1825: if ($target ne 'helper') {
1826: return '';
1827: }
1828:
1829: $paramHash->{'variable'} = $token->[2]{'variable'};
1830: $helper->declareVar($paramHash->{'variable'});
1.14 bowersj2 1831: $paramHash->{'multichoice'} = $token->[2]{'multichoice'};
1.29 bowersj2 1832: $paramHash->{'suppressEmptySequences'} = $token->[2]{'suppressEmptySequences'};
1.17 bowersj2 1833: $paramHash->{'toponly'} = $token->[2]{'toponly'};
1.46 bowersj2 1834: $paramHash->{'addstatus'} = $token->[2]{'addstatus'};
1.95 albertel 1835: $paramHash->{'addparts'} = $token->[2]{'addparts'};
1836: if ($paramHash->{'addparts'}) {
1837: $helper->declareVar($paramHash->{'variable'}.'_part');
1838: }
1.66 albertel 1839: $paramHash->{'closeallpages'} = $token->[2]{'closeallpages'};
1.5 bowersj2 1840: return '';
1841: }
1842:
1843: sub end_resource {
1844: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1845:
1846: if ($target ne 'helper') {
1847: return '';
1848: }
1849: if (!defined($paramHash->{FILTER_FUNC})) {
1850: $paramHash->{FILTER_FUNC} = sub {return 1;};
1851: }
1852: if (!defined($paramHash->{CHOICE_FUNC})) {
1853: $paramHash->{CHOICE_FUNC} = sub {return 1;};
1854: }
1855: if (!defined($paramHash->{VALUE_FUNC})) {
1856: $paramHash->{VALUE_FUNC} = sub {my $res = shift; return $res->{ID}; };
1857: }
1858: Apache::lonhelper::resource->new();
1.4 bowersj2 1859: return '';
1860: }
1861:
1.5 bowersj2 1862: sub start_filterfunc {
1863: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1864:
1865: if ($target ne 'helper') {
1866: return '';
1867: }
1868:
1869: my $contents = Apache::lonxml::get_all_text('/filterfunc',
1870: $parser);
1871: $contents = 'sub { my $res = shift; ' . $contents . '}';
1872: $paramHash->{FILTER_FUNC} = eval $contents;
1873: }
1874:
1875: sub end_filterfunc { return ''; }
1876:
1877: sub start_choicefunc {
1878: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1879:
1880: if ($target ne 'helper') {
1881: return '';
1882: }
1883:
1884: my $contents = Apache::lonxml::get_all_text('/choicefunc',
1885: $parser);
1886: $contents = 'sub { my $res = shift; ' . $contents . '}';
1887: $paramHash->{CHOICE_FUNC} = eval $contents;
1888: }
1889:
1890: sub end_choicefunc { return ''; }
1891:
1892: sub start_valuefunc {
1893: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1894:
1895: if ($target ne 'helper') {
1896: return '';
1897: }
1898:
1899: my $contents = Apache::lonxml::get_all_text('/valuefunc',
1900: $parser);
1901: $contents = 'sub { my $res = shift; ' . $contents . '}';
1902: $paramHash->{VALUE_FUNC} = eval $contents;
1903: }
1904:
1905: sub end_valuefunc { return ''; }
1906:
1.13 bowersj2 1907: sub start_mapurl {
1908: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1909:
1910: if ($target ne 'helper') {
1911: return '';
1912: }
1913:
1914: my $contents = Apache::lonxml::get_all_text('/mapurl',
1915: $parser);
1.48 bowersj2 1916: $paramHash->{EVAL_MAP_URL} = $token->[2]{'evaluate'};
1.14 bowersj2 1917: $paramHash->{MAP_URL} = $contents;
1.13 bowersj2 1918: }
1919:
1920: sub end_mapurl { return ''; }
1921:
1.90 foxr 1922:
1923: sub start_option {
1924: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1925: if (!defined($paramHash->{OPTION_TEXTS})) {
1926: $paramHash->{OPTION_TEXTS} = [ ];
1927: $paramHash->{OPTION_VARS} = [ ];
1.91 foxr 1928:
1.90 foxr 1929: }
1.91 foxr 1930: # OPTION_TEXTS is a list of the text attribute
1931: # values used to create column headings.
1932: # OPTION_VARS is a list of the variable names, used to create the checkbox
1933: # inputs.
1.90 foxr 1934: # We're ok with empty elements. as place holders
1935: # Although the 'variable' element should really exist.
1.91 foxr 1936: #
1937:
1.90 foxr 1938: my $option_texts = $paramHash->{OPTION_TEXTS};
1939: my $option_vars = $paramHash->{OPTION_VARS};
1940: push(@$option_texts, $token->[2]{'text'});
1941: push(@$option_vars, $token->[2]{'variable'});
1942:
1.91 foxr 1943: # Need to create and declare the option variables as well to make them
1944: # persistent.
1945: #
1946: my $varname = $token->[2]{'variable'};
1947: $helper->declareVar($varname);
1948:
1949:
1.90 foxr 1950: return '';
1951: }
1952:
1953: sub end_option {
1954: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1955: return '';
1956: }
1957:
1.5 bowersj2 1958: # A note, in case I don't get to this before I leave.
1959: # If someone complains about the "Back" button returning them
1960: # to the previous folder state, instead of returning them to
1961: # the previous helper state, the *correct* answer is for the helper
1962: # to keep track of how many times the user has manipulated the folders,
1963: # and feed that to the history.go() call in the helper rendering routines.
1964: # If done correctly, the helper itself can keep track of how many times
1965: # it renders the same states, so it doesn't go in just this state, and
1966: # you can lean on the browser back button to make sure it all chains
1967: # correctly.
1968: # Right now, though, I'm just forcing all folders open.
1969:
1970: sub render {
1971: my $self = shift;
1972: my $result = "";
1973: my $var = $self->{'variable'};
1974: my $curVal = $helper->{VARS}->{$var};
1975:
1.15 bowersj2 1976: my $buttons = '';
1977:
1978: if ($self->{'multichoice'}) {
1979: $result = <<SCRIPT;
1.112 albertel 1980: <script type="text/javascript">
1981: // <!--
1.18 bowersj2 1982: function checkall(value, checkName) {
1.15 bowersj2 1983: for (i=0; i<document.forms.helpform.elements.length; i++) {
1984: ele = document.forms.helpform.elements[i];
1.18 bowersj2 1985: if (ele.name == checkName + '.forminput') {
1.15 bowersj2 1986: document.forms.helpform.elements[i].checked=value;
1987: }
1988: }
1989: }
1.112 albertel 1990: // -->
1.15 bowersj2 1991: </script>
1992: SCRIPT
1.68 sakharuk 1993: my %lt=&Apache::lonlocal::texthash(
1994: 'sar' => "Select All Resources",
1995: 'uar' => "Unselect All Resources");
1996:
1.15 bowersj2 1997: $buttons = <<BUTTONS;
1998: <br />
1.68 sakharuk 1999: <input type="button" onclick="checkall(true, '$var')" value="$lt{'sar'}" />
2000: <input type="button" onclick="checkall(false, '$var')" value="$lt{'uar'}" />
1.15 bowersj2 2001: <br />
2002: BUTTONS
2003: }
2004:
1.5 bowersj2 2005: if (defined $self->{ERROR_MSG}) {
1.14 bowersj2 2006: $result .= '<br /><font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br /><br />';
1.5 bowersj2 2007: }
2008:
1.15 bowersj2 2009: $result .= $buttons;
2010:
1.90 foxr 2011: my $filterFunc = $self->{FILTER_FUNC};
2012: my $choiceFunc = $self->{CHOICE_FUNC};
2013: my $valueFunc = $self->{VALUE_FUNC};
1.95 albertel 2014: my $multichoice = $self->{'multichoice'};
1.90 foxr 2015: my $option_vars = $self->{OPTION_VARS};
2016: my $option_texts = $self->{OPTION_TEXTS};
1.95 albertel 2017: my $addparts = $self->{'addparts'};
1.90 foxr 2018: my $headings_done = 0;
1.5 bowersj2 2019:
1.48 bowersj2 2020: # Evaluate the map url as needed
2021: my $mapUrl;
1.49 bowersj2 2022: if ($self->{EVAL_MAP_URL}) {
1.48 bowersj2 2023: my $mapUrlFunc = eval('sub { my $helper = shift; my $state = shift; ' .
2024: $self->{MAP_URL} . '}');
2025: $mapUrl = &$mapUrlFunc($helper, $self);
2026: } else {
2027: $mapUrl = $self->{MAP_URL};
2028: }
2029:
1.125 albertel 2030: my %defaultSymbs;
1.124 albertel 2031: if (defined($self->{DEFAULT_VALUE})) {
2032: my $valueFunc = eval($self->{DEFAULT_VALUE});
2033: die 'Error in default value code for variable ' .
2034: $self->{'variable'} . ', Perl said: ' . $@ if $@;
1.125 albertel 2035: my @defaultSymbs = &$valueFunc($helper, $self);
2036: if (!$multichoice && @defaultSymbs) { # only allowed 1
1.124 albertel 2037: @defaultSymbs = ($defaultSymbs[0]);
2038: }
1.125 albertel 2039: %defaultSymbs = map { if ($_) {($_,1) } } @defaultSymbs;
2040: delete($defaultSymbs{''});
1.124 albertel 2041: }
2042:
1.5 bowersj2 2043: # Create the composite function that renders the column on the nav map
2044: # have to admit any language that lets me do this can't be all bad
2045: # - Jeremy (Pythonista) ;-)
2046: my $checked = 0;
2047: my $renderColFunc = sub {
2048: my ($resource, $part, $params) = @_;
1.90 foxr 2049: my $result = "";
2050:
2051: if(!$headings_done) {
2052: if ($option_texts) {
2053: foreach my $text (@$option_texts) {
2054: $result .= "<th>$text</th>";
2055: }
2056: }
2057: $result .= "<th>Select</th>";
2058: $result .= "</tr><tr>"; # Close off the extra row and start a new one.
2059: $headings_done = 1;
2060: }
1.14 bowersj2 2061:
2062: my $inputType;
2063: if ($multichoice) { $inputType = 'checkbox'; }
2064: else {$inputType = 'radio'; }
2065:
1.5 bowersj2 2066: if (!&$choiceFunc($resource)) {
1.90 foxr 2067: $result .= '<td> </td>';
2068: return $result;
1.5 bowersj2 2069: } else {
1.90 foxr 2070: my $col = "";
1.98 foxr 2071: my $raw_name = &$valueFunc($resource);
1.90 foxr 2072: my $resource_name =
1.98 foxr 2073: HTML::Entities::encode($raw_name,"<>&\"'");
1.90 foxr 2074: if($option_vars) {
1.91 foxr 2075: foreach my $option_var (@$option_vars) {
1.99 foxr 2076: my $var_value = "\|\|\|" . $helper->{VARS}->{$option_var} .
2077: "\|\|\|";
1.98 foxr 2078: my $checked ="";
1.99 foxr 2079: if($var_value =~ /\Q|||$raw_name|||\E/) {
1.111 albertel 2080: $checked = "checked='checked'";
1.98 foxr 2081: }
1.90 foxr 2082: $col .=
1.91 foxr 2083: "<td align='center'><input type='checkbox' name ='$option_var".
2084: ".forminput' value='".
1.98 foxr 2085: $resource_name . "' $checked /> </td>";
1.90 foxr 2086: }
2087: }
2088:
2089: $col .= "<td align='center'><input type='$inputType' name='${var}.forminput' ";
1.125 albertel 2090: if (%defaultSymbs) {
1.124 albertel 2091: my $symb=$resource->symb();
1.125 albertel 2092: if (exists($defaultSymbs{$symb})) {
1.124 albertel 2093: $col .= "checked='checked' ";
2094: $checked = 1;
2095: }
2096: } else {
2097: if (!$checked && !$multichoice) {
2098: $col .= "checked='checked' ";
2099: $checked = 1;
2100: }
2101: if ($multichoice) { # all resources start checked; see bug 1174
2102: $col .= "checked='checked' ";
2103: $checked = 1;
2104: }
1.37 bowersj2 2105: }
1.90 foxr 2106: $col .= "value='" . $resource_name . "' /></td>";
1.95 albertel 2107:
1.90 foxr 2108: return $result.$col;
1.5 bowersj2 2109: }
2110: };
1.95 albertel 2111: my $renderPartsFunc = sub {
2112: my ($resource, $part, $params) = @_;
2113: my $col= "<td>";
2114: my $id=$resource->{ID};
2115: my $resource_name =
2116: &HTML::Entities::encode(&$valueFunc($resource),"<>&\"'");
2117: if ($addparts && (scalar(@{$resource->parts}) > 1)) {
2118: $col .= "<select onclick=\"javascript:updateRadio(this.form,'${var}.forminput','$resource_name');updateHidden(this.form,'$id','${var}');\" name='part_$id.forminput'>\n";
2119: $col .= "<option value=\"$part\">All Parts</option>\n";
2120: foreach my $part (@{$resource->parts}) {
2121: $col .= "<option value=\"$part\">Part: $part</option>\n";
2122: }
2123: $col .= "</select>";
2124: }
2125: $col .= "</td>";
2126: };
2127: $result.=(<<RADIO);
2128: <script type="text/javascript">
1.112 albertel 2129: // <!--
1.95 albertel 2130: function updateRadio(form,name,value) {
2131: var radiobutton=form[name];
2132: for (var i=0; i<radiobutton.length; i++) {
2133: if (radiobutton[i].value == value) {
2134: radiobutton[i].checked = true;
2135: break;
2136: }
2137: }
2138: }
2139: function updateHidden(form,id,name) {
2140: var select=form['part_'+id+'.forminput'];
2141: var hidden=form[name+'_part.forminput'];
2142: var which=select.selectedIndex;
2143: hidden.value=select.options[which].value;
2144: }
1.112 albertel 2145: // -->
1.95 albertel 2146: </script>
1.101 albertel 2147: <input type="hidden" name="${var}_part.forminput" />
1.5 bowersj2 2148:
1.95 albertel 2149: RADIO
1.100 albertel 2150: $env{'form.condition'} = !$self->{'toponly'};
1.95 albertel 2151: my $cols = [$renderColFunc];
2152: if ($self->{'addparts'}) { push(@$cols, $renderPartsFunc); }
2153: push(@$cols, Apache::lonnavmaps::resource());
1.46 bowersj2 2154: if ($self->{'addstatus'}) {
2155: push @$cols, (Apache::lonnavmaps::part_status_summary());
2156:
2157: }
1.5 bowersj2 2158: $result .=
1.46 bowersj2 2159: &Apache::lonnavmaps::render( { 'cols' => $cols,
1.5 bowersj2 2160: 'showParts' => 0,
2161: 'filterFunc' => $filterFunc,
1.13 bowersj2 2162: 'resource_no_folder_link' => 1,
1.66 albertel 2163: 'closeAllPages' => $self->{'closeallpages'},
1.29 bowersj2 2164: 'suppressEmptySequences' => $self->{'suppressEmptySequences'},
1.13 bowersj2 2165: 'iterator_map' => $mapUrl }
1.5 bowersj2 2166: );
1.15 bowersj2 2167:
2168: $result .= $buttons;
1.5 bowersj2 2169:
2170: return $result;
2171: }
2172:
2173: sub postprocess {
2174: my $self = shift;
1.14 bowersj2 2175:
2176: if ($self->{'multichoice'} && !$helper->{VARS}->{$self->{'variable'}}) {
2177: $self->{ERROR_MSG} = 'You must choose at least one resource to continue.';
2178: return 0;
2179: }
2180:
1.5 bowersj2 2181: if (defined($self->{NEXTSTATE})) {
2182: $helper->changeState($self->{NEXTSTATE});
2183: }
1.6 bowersj2 2184:
2185: return 1;
1.5 bowersj2 2186: }
2187:
2188: 1;
2189:
2190: package Apache::lonhelper::student;
2191:
2192: =pod
2193:
1.44 bowersj2 2194: =head2 Element: studentX<student, helper element>
1.5 bowersj2 2195:
2196: Student elements display a choice of students enrolled in the current
2197: course. Currently it is primitive; this is expected to evolve later.
2198:
1.48 bowersj2 2199: Student elements take the following attributes:
2200:
2201: =over 4
2202:
2203: =item * B<variable>:
2204:
2205: Does what it usually does: declare which helper variable to put the
2206: result in.
2207:
2208: =item * B<multichoice>:
2209:
2210: If true allows the user to select multiple students. Defaults to false.
2211:
2212: =item * B<coursepersonnel>:
2213:
2214: If true adds the course personnel to the top of the student
2215: selection. Defaults to false.
2216:
2217: =item * B<activeonly>:
2218:
2219: If true, only active students and course personnel will be
2220: shown. Defaults to false.
2221:
1.123 albertel 2222: =item * B<emptyallowed>:
2223:
2224: If true, the selection of no users is allowed. Defaults to false.
2225:
1.48 bowersj2 2226: =back
1.5 bowersj2 2227:
2228: =cut
2229:
2230: no strict;
2231: @ISA = ("Apache::lonhelper::element");
2232: use strict;
1.59 bowersj2 2233: use Apache::lonlocal;
1.100 albertel 2234: use Apache::lonnet;
1.5 bowersj2 2235:
2236: BEGIN {
1.7 bowersj2 2237: &Apache::lonhelper::register('Apache::lonhelper::student',
1.5 bowersj2 2238: ('student'));
2239: }
2240:
2241: sub new {
2242: my $ref = Apache::lonhelper::element->new();
2243: bless($ref);
2244: }
1.4 bowersj2 2245:
1.5 bowersj2 2246: sub start_student {
1.4 bowersj2 2247: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
2248:
2249: if ($target ne 'helper') {
2250: return '';
2251: }
2252:
1.5 bowersj2 2253: $paramHash->{'variable'} = $token->[2]{'variable'};
2254: $helper->declareVar($paramHash->{'variable'});
2255: $paramHash->{'multichoice'} = $token->[2]{'multichoice'};
1.39 bowersj2 2256: $paramHash->{'coursepersonnel'} = $token->[2]{'coursepersonnel'};
1.93 albertel 2257: $paramHash->{'activeonly'} = $token->[2]{'activeonly'};
1.12 bowersj2 2258: if (defined($token->[2]{'nextstate'})) {
2259: $paramHash->{NEXTSTATE} = $token->[2]{'nextstate'};
2260: }
1.123 albertel 2261: $paramHash->{'emptyallowed'} = $token->[2]{'emptyallowed'};
1.12 bowersj2 2262:
1.5 bowersj2 2263: }
2264:
2265: sub end_student {
2266: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
2267:
2268: if ($target ne 'helper') {
2269: return '';
2270: }
2271: Apache::lonhelper::student->new();
1.3 bowersj2 2272: }
1.5 bowersj2 2273:
2274: sub render {
2275: my $self = shift;
2276: my $result = '';
2277: my $buttons = '';
1.18 bowersj2 2278: my $var = $self->{'variable'};
1.5 bowersj2 2279:
2280: if ($self->{'multichoice'}) {
2281: $result = <<SCRIPT;
1.112 albertel 2282: <script type="text/javascript">
2283: // <!--
1.18 bowersj2 2284: function checkall(value, checkName) {
1.15 bowersj2 2285: for (i=0; i<document.forms.helpform.elements.length; i++) {
1.18 bowersj2 2286: ele = document.forms.helpform.elements[i];
2287: if (ele.name == checkName + '.forminput') {
2288: document.forms.helpform.elements[i].checked=value;
2289: }
1.5 bowersj2 2290: }
2291: }
1.58 sakharuk 2292: function checksec(value) {
1.53 sakharuk 2293: for (i=0; i<document.forms.helpform.elements.length; i++) {
2294: comp = document.forms.helpform.elements.chksec.value;
2295: if (document.forms.helpform.elements[i].value.indexOf(':'+comp+':') != -1) {
1.82 sakharuk 2296: if (document.forms.helpform.elements[i].value.indexOf(':Active') != -1) {
2297: document.forms.helpform.elements[i].checked=value;
2298: }
1.53 sakharuk 2299: }
2300: }
2301: }
2302: function checkactive() {
2303: for (i=0; i<document.forms.helpform.elements.length; i++) {
2304: if (document.forms.helpform.elements[i].value.indexOf(':Active') != -1) {
2305: document.forms.helpform.elements[i].checked=true;
1.82 sakharuk 2306: }
2307: }
2308: }
2309: function uncheckexpired() {
2310: for (i=0; i<document.forms.helpform.elements.length; i++) {
2311: if (document.forms.helpform.elements[i].value.indexOf(':Expired') != -1) {
2312: document.forms.helpform.elements[i].checked=false;
2313: }
1.53 sakharuk 2314: }
2315: }
1.113 foxr 2316: function getDesiredState() { // Return desired person state radio value.
2317: numRadio = document.forms.helpform.personstate.length;
2318: for (i =0; i < numRadio; i++) {
2319: if (document.forms.helpform.personstate[i].checked) {
2320: return document.forms.helpform.personstate[i].value;
2321: }
2322: }
2323: return "";
2324: }
2325:
2326: function checksections(value) { // Check selected sections.
2327: numSections = document.forms.helpform.chosensections.length;
2328: desiredState = getDesiredState();
2329:
1.116 albertel 2330: for (var option = 0; option < numSections; option++) {
1.113 foxr 2331: if(document.forms.helpform.chosensections.options[option].selected) {
2332: section = document.forms.helpform.chosensections.options[option].text;
1.116 albertel 2333: if (section == "none") {
1.113 foxr 2334: section ="";
2335: }
2336: for (i = 0; i < document.forms.helpform.elements.length; i++ ) {
2337: if (document.forms.helpform.elements[i].value.indexOf(':') != -1) {
2338: info = document.forms.helpform.elements[i].value.split(':');
2339: hisSection = info[2];
2340: hisState = info[4];
1.116 albertel 2341: if (desiredState == hisState ||
2342: desiredState == "All") {
2343: if(hisSection == section ||
2344: section =="" ) {
2345: document.forms.helpform.elements[i].checked = value;
2346: }
1.113 foxr 2347: }
2348: }
2349: }
2350: }
2351: }
2352: }
1.112 albertel 2353: // -->
1.5 bowersj2 2354: </script>
2355: SCRIPT
1.59 bowersj2 2356:
1.68 sakharuk 2357: my %lt=&Apache::lonlocal::texthash(
2358: 'ocs' => "Select Only Current Students",
1.82 sakharuk 2359: 'ues' => "Unselect Expired Students",
1.68 sakharuk 2360: 'sas' => "Select All Students",
2361: 'uas' => "Unselect All Students",
1.82 sakharuk 2362: 'sfsg' => "Select Current Students for Section/Group",
1.68 sakharuk 2363: 'ufsg' => "Unselect for Section/Group");
2364:
1.5 bowersj2 2365: $buttons = <<BUTTONS;
2366: <br />
1.92 foxr 2367: <table>
2368:
2369: <tr>
2370: <td><input type="button" onclick="checkall(true, '$var')" value="$lt{'sas'}" /></td>
2371: <td> <input type="button" onclick="checkall(false, '$var')" value="$lt{'uas'}" /><br /></td>
2372: </tr>
1.113 foxr 2373:
1.92 foxr 2374: </table>
1.5 bowersj2 2375: <br />
2376: BUTTONS
1.131 ! foxr 2377: $result .= $buttons;
! 2378:
1.5 bowersj2 2379: }
2380:
2381: if (defined $self->{ERROR_MSG}) {
2382: $result .= '<font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br /><br />';
2383: }
2384:
1.126 albertel 2385: my %defaultUsers;
2386: if (defined($self->{DEFAULT_VALUE})) {
2387: my $valueFunc = eval($self->{DEFAULT_VALUE});
2388: die 'Error in default value code for variable ' .
2389: $self->{'variable'} . ', Perl said: ' . $@ if $@;
2390: my @defaultUsers = &$valueFunc($helper, $self);
2391: if (!$self->{'multichoice'} && @defaultUsers) { # only allowed 1
2392: @defaultUsers = ($defaultUsers[0]);
2393: }
2394: %defaultUsers = map { if ($_) {($_,1) } } @defaultUsers;
2395: delete($defaultUsers{''});
2396: }
1.39 bowersj2 2397: my $choices = [];
2398:
2399: # Load up the non-students, if necessary
2400: if ($self->{'coursepersonnel'}) {
2401: my %coursepersonnel = Apache::lonnet::get_course_adv_roles();
2402: for (sort keys %coursepersonnel) {
2403: for my $role (split /,/, $coursepersonnel{$_}) {
2404: # extract the names so we can sort them
2405: my @people;
2406:
2407: for (split /,/, $role) {
2408: push @people, [split /:/, $role];
2409: }
2410:
2411: @people = sort { $a->[0] cmp $b->[0] } @people;
2412:
2413: for my $person (@people) {
2414: push @$choices, [join(':', @$person), $person->[0], '', $_];
2415: }
2416: }
2417: }
2418: }
1.5 bowersj2 2419:
2420: # Constants
2421: my $section = Apache::loncoursedata::CL_SECTION();
2422: my $fullname = Apache::loncoursedata::CL_FULLNAME();
1.48 bowersj2 2423: my $status = Apache::loncoursedata::CL_STATUS();
1.5 bowersj2 2424:
1.39 bowersj2 2425: # Load up the students
2426: my $classlist = &Apache::loncoursedata::get_classlist();
2427: my @keys = keys %{$classlist};
1.5 bowersj2 2428: # Sort by: Section, name
2429: @keys = sort {
1.39 bowersj2 2430: if ($classlist->{$a}->[$section] ne $classlist->{$b}->[$section]) {
2431: return $classlist->{$a}->[$section] cmp $classlist->{$b}->[$section];
1.5 bowersj2 2432: }
1.39 bowersj2 2433: return $classlist->{$a}->[$fullname] cmp $classlist->{$b}->[$fullname];
1.5 bowersj2 2434: } @keys;
1.131 ! foxr 2435: #
! 2436: # now add the fancy section choice... first enumerate the sections:
! 2437: if ($self->{'multichoice'}) {
! 2438: my %sections;
! 2439: for my $key (@keys) {
! 2440: my $section_name = $classlist->{$key}->[$section];
! 2441: if ($section_name ne "") {
! 2442: $sections{$section_name} = 1;
! 2443: }
! 2444: }
! 2445: # The variable $choice_widget will have the html to make the choice
! 2446: # selector.
! 2447: my $size=5;
! 2448: if (scalar(keys(%sections)) < 5) {
! 2449: $size=scalar(keys(%sections));
! 2450: }
! 2451: my $choice_widget = '<select multiple name="chosensections" size="'.$size.'">'."\n";
! 2452: foreach my $sec (sort {lc($a) cmp lc($b)} (keys(%sections))) {
! 2453: $choice_widget .= "<option name=\"$sec\">$sec</option>\n";
! 2454: }
! 2455: $choice_widget .= "<option>none</option></select>\n";
! 2456:
! 2457: # Build a table without any borders to contain the section based
! 2458: # selection:
! 2459:
! 2460: my $section_selectors =<<SECTIONSELECT;
! 2461: <table border="0">
! 2462: <tr valign="top">
! 2463: <td>For Sections:</td><td>$choice_widget</td>
! 2464: <td><label><input type="radio" name="personstate" value="Active" checked />
! 2465: Current Students</label></td>
! 2466: <td><label><input type="radio" name="personstate" value="All" />
! 2467: All students</label></td>
! 2468: <td><label><input type="radio" name="personstate" value="Expired" />
! 2469: Expired Students</label></td>
! 2470: </tr>
! 2471: <tr>
! 2472: <td><input type="button" value="Select" onclick="checksections(true);" /></td>
! 2473: <td><input type="button" value="Unselect" onclick="checksections(false);" /></td></tr>
! 2474: </table>
! 2475: <br />
! 2476: SECTIONSELECT
! 2477: $result .= $section_selectors;
! 2478: }
1.5 bowersj2 2479:
1.39 bowersj2 2480: # username, fullname, section, type
2481: for (@keys) {
1.48 bowersj2 2482: # Filter out inactive students if we've set "activeonly"
2483: if (!$self->{'activeonly'} || $classlist->{$_}->[$status] eq
2484: 'Active') {
2485: push @$choices, [$_, $classlist->{$_}->[$fullname],
1.53 sakharuk 2486: $classlist->{$_}->[$section],
2487: $classlist->{$_}->[$status], 'Student'];
1.48 bowersj2 2488: }
1.39 bowersj2 2489: }
2490:
1.68 sakharuk 2491: my $name = $self->{'coursepersonnel'} ? &mt('Name') : &mt('Student Name');
1.5 bowersj2 2492: my $type = 'radio';
2493: if ($self->{'multichoice'}) { $type = 'checkbox'; }
2494: $result .= "<table cellspacing='2' cellpadding='2' border='0'>\n";
1.39 bowersj2 2495: $result .= "<tr><td></td><td align='center'><b>$name</b></td>".
1.59 bowersj2 2496: "<td align='center'><b>" . &mt('Section') . "</b></td>" .
1.68 sakharuk 2497: "<td align='center'><b>".&mt('Status')."</b></td>" .
2498: "<td align='center'><b>" . &mt("Role") . "</b></td>" .
2499: "<td align='center'><b>".&mt('Username').":".&mt('Domain')."</b></td></tr>";
1.5 bowersj2 2500:
2501: my $checked = 0;
1.39 bowersj2 2502: for my $choice (@$choices) {
1.5 bowersj2 2503: $result .= "<tr><td><input type='$type' name='" .
2504: $self->{'variable'} . '.forminput' . "'";
2505:
1.126 albertel 2506: if (%defaultUsers) {
2507: my $user=$choice->[0];
2508: if (exists($defaultUsers{$user})) {
2509: $result .= " checked='checked' ";
2510: $checked = 1;
2511: }
2512: } elsif (!$self->{'multichoice'} && !$checked) {
1.111 albertel 2513: $result .= " checked='checked' ";
1.5 bowersj2 2514: $checked = 1;
2515: }
2516: $result .=
1.89 foxr 2517: " value='" . HTML::Entities::encode($choice->[0] . ':'
2518: .$choice->[2] . ':'
2519: .$choice->[1] . ':'
2520: .$choice->[3], "<>&\"'")
1.5 bowersj2 2521: . "' /></td><td>"
1.67 albertel 2522: . HTML::Entities::encode($choice->[1],'<>&"')
1.5 bowersj2 2523: . "</td><td align='center'>"
1.67 albertel 2524: . HTML::Entities::encode($choice->[2],'<>&"')
1.39 bowersj2 2525: . "</td>\n<td>"
1.67 albertel 2526: . HTML::Entities::encode($choice->[3],'<>&"')
1.53 sakharuk 2527: . "</td>\n<td>"
1.67 albertel 2528: . HTML::Entities::encode($choice->[4],'<>&"')
1.53 sakharuk 2529: . "</td>\n<td>"
1.67 albertel 2530: . HTML::Entities::encode($choice->[0],'<>&"')
1.53 sakharuk 2531: . "</td></tr>\n";
1.5 bowersj2 2532: }
2533:
2534: $result .= "</table>\n\n";
1.113 foxr 2535:
2536:
1.5 bowersj2 2537: return $result;
2538: }
2539:
1.6 bowersj2 2540: sub postprocess {
2541: my $self = shift;
2542:
1.100 albertel 2543: my $result = $env{'form.' . $self->{'variable'} . '.forminput'};
1.123 albertel 2544: if (!$result && !$self->{'emptyallowed'}) {
2545: if ($self->{'coursepersonnel'}) {
2546: $self->{ERROR_MSG} =
2547: &mt('You must choose at least one user to continue.');
2548: } else {
2549: $self->{ERROR_MSG} =
2550: &mt('You must choose at least one student to continue.');
2551: }
1.6 bowersj2 2552: return 0;
2553: }
2554:
2555: if (defined($self->{NEXTSTATE})) {
2556: $helper->changeState($self->{NEXTSTATE});
2557: }
2558:
2559: return 1;
2560: }
2561:
1.5 bowersj2 2562: 1;
2563:
2564: package Apache::lonhelper::files;
2565:
2566: =pod
2567:
1.44 bowersj2 2568: =head2 Element: filesX<files, helper element>
1.5 bowersj2 2569:
2570: files allows the users to choose files from a given directory on the
2571: server. It is always multichoice and stores the result as a triple-pipe
2572: delimited entry in the helper variables.
2573:
2574: Since it is extremely unlikely that you can actually code a constant
2575: representing the directory you wish to allow the user to search, <files>
2576: takes a subroutine that returns the name of the directory you wish to
2577: have the user browse.
2578:
2579: files accepts the attribute "variable" to control where the files chosen
2580: are put. It accepts the attribute "multichoice" as the other attribute,
2581: defaulting to false, which if true will allow the user to select more
2582: then one choice.
2583:
1.44 bowersj2 2584: <files> accepts three subtags:
2585:
2586: =over 4
2587:
2588: =item * B<nextstate>: works as it does with the other tags.
2589:
2590: =item * B<filechoice>: When the contents of this tag are surrounded by
2591: "sub {" and "}", will return a string representing what directory
2592: on the server to allow the user to choose files from.
2593:
2594: =item * B<filefilter>: Should contain Perl code that when surrounded
2595: by "sub { my $filename = shift; " and "}", returns a true value if
2596: the user can pick that file, or false otherwise. The filename
2597: passed to the function will be just the name of the file, with no
2598: path info. By default, a filter function will be used that will
2599: mask out old versions of files. This function is available as
2600: Apache::lonhelper::files::not_old_version if you want to use it to
2601: composite your own filters.
2602:
2603: =back
2604:
2605: B<General security note>: You should ensure the user can not somehow
2606: pass something into your code that would allow them to look places
2607: they should not be able to see, like the C</etc/> directory. However,
2608: the security impact would be minimal, since it would only expose
2609: the existence of files, there should be no way to parlay that into
2610: viewing the files.
1.5 bowersj2 2611:
2612: =cut
2613:
2614: no strict;
2615: @ISA = ("Apache::lonhelper::element");
2616: use strict;
1.59 bowersj2 2617: use Apache::lonlocal;
1.100 albertel 2618: use Apache::lonnet;
1.32 bowersj2 2619: use Apache::lonpubdir; # for getTitleString
2620:
1.5 bowersj2 2621: BEGIN {
1.7 bowersj2 2622: &Apache::lonhelper::register('Apache::lonhelper::files',
2623: ('files', 'filechoice', 'filefilter'));
1.5 bowersj2 2624: }
2625:
1.44 bowersj2 2626: sub not_old_version {
2627: my $file = shift;
2628:
2629: # Given a file name, return false if it is an "old version" of a
2630: # file, or true if it is not.
2631:
2632: if ($file =~ /^.*\.[0-9]+\.[A-Za-z]+(\.meta)?$/) {
2633: return 0;
2634: }
2635: return 1;
2636: }
2637:
1.5 bowersj2 2638: sub new {
2639: my $ref = Apache::lonhelper::element->new();
2640: bless($ref);
2641: }
2642:
2643: sub start_files {
2644: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
2645:
2646: if ($target ne 'helper') {
2647: return '';
2648: }
2649: $paramHash->{'variable'} = $token->[2]{'variable'};
2650: $helper->declareVar($paramHash->{'variable'});
2651: $paramHash->{'multichoice'} = $token->[2]{'multichoice'};
2652: }
2653:
2654: sub end_files {
2655: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
2656:
2657: if ($target ne 'helper') {
2658: return '';
2659: }
2660: if (!defined($paramHash->{FILTER_FUNC})) {
2661: $paramHash->{FILTER_FUNC} = sub { return 1; };
2662: }
2663: Apache::lonhelper::files->new();
2664: }
2665:
2666: sub start_filechoice {
2667: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
2668:
2669: if ($target ne 'helper') {
2670: return '';
2671: }
2672: $paramHash->{'filechoice'} = Apache::lonxml::get_all_text('/filechoice',
2673: $parser);
2674: }
2675:
2676: sub end_filechoice { return ''; }
2677:
2678: sub start_filefilter {
2679: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
2680:
2681: if ($target ne 'helper') {
2682: return '';
2683: }
2684:
2685: my $contents = Apache::lonxml::get_all_text('/filefilter',
2686: $parser);
2687: $contents = 'sub { my $filename = shift; ' . $contents . '}';
2688: $paramHash->{FILTER_FUNC} = eval $contents;
2689: }
2690:
2691: sub end_filefilter { return ''; }
1.3 bowersj2 2692:
1.87 matthew 2693: {
2694: # used to generate unique id attributes for <input> tags.
2695: # internal use only.
2696: my $id=0;
2697: sub new_id { return $id++;}
2698: }
2699:
1.3 bowersj2 2700: sub render {
2701: my $self = shift;
1.5 bowersj2 2702: my $result = '';
2703: my $var = $self->{'variable'};
2704:
2705: my $subdirFunc = eval('sub {' . $self->{'filechoice'} . '}');
1.11 bowersj2 2706: die 'Error in resource filter code for variable ' .
2707: {'variable'} . ', Perl said:' . $@ if $@;
2708:
1.5 bowersj2 2709: my $subdir = &$subdirFunc();
2710:
2711: my $filterFunc = $self->{FILTER_FUNC};
1.44 bowersj2 2712: if (!defined($filterFunc)) {
2713: $filterFunc = ¬_old_version;
2714: }
1.5 bowersj2 2715: my $buttons = '';
1.22 bowersj2 2716: my $type = 'radio';
2717: if ($self->{'multichoice'}) {
2718: $type = 'checkbox';
2719: }
1.5 bowersj2 2720:
2721: if ($self->{'multichoice'}) {
2722: $result = <<SCRIPT;
1.112 albertel 2723: <script type="text/javascript">
2724: // <!--
1.18 bowersj2 2725: function checkall(value, checkName) {
1.15 bowersj2 2726: for (i=0; i<document.forms.helpform.elements.length; i++) {
2727: ele = document.forms.helpform.elements[i];
1.18 bowersj2 2728: if (ele.name == checkName + '.forminput') {
1.15 bowersj2 2729: document.forms.helpform.elements[i].checked=value;
1.5 bowersj2 2730: }
2731: }
2732: }
1.21 bowersj2 2733:
1.22 bowersj2 2734: function checkallclass(value, className) {
1.21 bowersj2 2735: for (i=0; i<document.forms.helpform.elements.length; i++) {
2736: ele = document.forms.helpform.elements[i];
1.22 bowersj2 2737: if (ele.type == "$type" && ele.onclick) {
1.21 bowersj2 2738: document.forms.helpform.elements[i].checked=value;
2739: }
2740: }
2741: }
1.112 albertel 2742: // -->
1.5 bowersj2 2743: </script>
2744: SCRIPT
1.68 sakharuk 2745: my %lt=&Apache::lonlocal::texthash(
2746: 'saf' => "Select All Files",
2747: 'uaf' => "Unselect All Files");
2748: $buttons = <<BUTTONS;
1.5 bowersj2 2749: <br />
1.68 sakharuk 2750: <input type="button" onclick="checkall(true, '$var')" value="$lt{'saf'}" />
2751: <input type="button" onclick="checkall(false, '$var')" value="$lt{'uaf'}" />
1.23 bowersj2 2752: BUTTONS
2753:
1.69 sakharuk 2754: %lt=&Apache::lonlocal::texthash(
1.68 sakharuk 2755: 'sap' => "Select All Published",
2756: 'uap' => "Unselect All Published");
1.23 bowersj2 2757: if ($helper->{VARS}->{'construction'}) {
1.68 sakharuk 2758: $buttons .= <<BUTTONS;
2759: <input type="button" onclick="checkallclass(true, 'Published')" value="$lt{'sap'}" />
2760: <input type="button" onclick="checkallclass(false, 'Published')" value="$lt{'uap'}" />
1.5 bowersj2 2761: <br />
2762: BUTTONS
1.23 bowersj2 2763: }
1.5 bowersj2 2764: }
2765:
2766: # Get the list of files in this directory.
2767: my @fileList;
2768:
2769: # If the subdirectory is in local CSTR space
1.47 albertel 2770: my $metadir;
2771: if ($subdir =~ m|/home/([^/]+)/public_html/(.*)|) {
1.110 albertel 2772: my ($user,$domain)=
2773: &Apache::loncacc::constructaccess($subdir,
2774: $Apache::lonnet::perlvar{'lonDefDomain'});
1.47 albertel 2775: $metadir='/res/'.$domain.'/'.$user.'/'.$2;
2776: @fileList = &Apache::lonnet::dirlist($subdir, $domain, $user, '');
2777: } elsif ($subdir =~ m|^~([^/]+)/(.*)$|) {
2778: $subdir='/home/'.$1.'/public_html/'.$2;
1.110 albertel 2779: my ($user,$domain)=
2780: &Apache::loncacc::constructaccess($subdir,
2781: $Apache::lonnet::perlvar{'lonDefDomain'});
1.47 albertel 2782: $metadir='/res/'.$domain.'/'.$user.'/'.$2;
1.5 bowersj2 2783: @fileList = &Apache::lonnet::dirlist($subdir, $domain, $user, '');
2784: } else {
2785: # local library server resource space
1.100 albertel 2786: @fileList = &Apache::lonnet::dirlist($subdir, $env{'user.domain'}, $env{'user.name'}, '');
1.5 bowersj2 2787: }
1.3 bowersj2 2788:
1.44 bowersj2 2789: # Sort the fileList into order
1.85 albertel 2790: @fileList = sort {lc($a) cmp lc($b)} @fileList;
1.44 bowersj2 2791:
1.5 bowersj2 2792: $result .= $buttons;
2793:
1.6 bowersj2 2794: if (defined $self->{ERROR_MSG}) {
2795: $result .= '<br /><font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br /><br />';
2796: }
2797:
1.20 bowersj2 2798: $result .= '<table border="0" cellpadding="2" cellspacing="0">';
1.5 bowersj2 2799:
2800: # Keeps track if there are no choices, prints appropriate error
2801: # if there are none.
2802: my $choices = 0;
2803: # Print each legitimate file choice.
2804: for my $file (@fileList) {
2805: $file = (split(/&/, $file))[0];
2806: if ($file eq '.' || $file eq '..') {
2807: next;
2808: }
2809: my $fileName = $subdir .'/'. $file;
2810: if (&$filterFunc($file)) {
1.24 sakharuk 2811: my $status;
2812: my $color;
2813: if ($helper->{VARS}->{'construction'}) {
2814: ($status, $color) = @{fileState($subdir, $file)};
2815: } else {
2816: $status = '';
2817: $color = '';
2818: }
1.22 bowersj2 2819:
1.32 bowersj2 2820: # Get the title
1.47 albertel 2821: my $title = Apache::lonpubdir::getTitleString(($metadir?$metadir:$subdir) .'/'. $file);
1.32 bowersj2 2822:
1.22 bowersj2 2823: # Netscape 4 is stupid and there's nowhere to put the
2824: # information on the input tag that the file is Published,
2825: # Unpublished, etc. In *real* browsers we can just say
2826: # "class='Published'" and check the className attribute of
2827: # the input tag, but Netscape 4 is too stupid to understand
2828: # that attribute, and un-comprehended attributes are not
2829: # reflected into the object model. So instead, what I do
2830: # is either have or don't have an "onclick" handler that
2831: # does nothing, give Published files the onclick handler, and
2832: # have the checker scripts check for that. Stupid and clumsy,
2833: # and only gives us binary "yes/no" information (at least I
2834: # couldn't figure out how to reach into the event handler's
2835: # actual code to retreive a value), but it works well enough
2836: # here.
1.23 bowersj2 2837:
1.22 bowersj2 2838: my $onclick = '';
1.23 bowersj2 2839: if ($status eq 'Published' && $helper->{VARS}->{'construction'}) {
1.22 bowersj2 2840: $onclick = 'onclick="a=1" ';
2841: }
1.87 matthew 2842: my $id = &new_id();
1.20 bowersj2 2843: $result .= '<tr><td align="right"' . " bgcolor='$color'>" .
1.22 bowersj2 2844: "<input $onclick type='$type' name='" . $var
1.89 foxr 2845: . ".forminput' ".qq{id="$id"}." value='" . HTML::Entities::encode($fileName,"<>&\"'").
1.5 bowersj2 2846: "'";
2847: if (!$self->{'multichoice'} && $choices == 0) {
1.111 albertel 2848: $result .= ' checked="checked"';
1.5 bowersj2 2849: }
1.87 matthew 2850: $result .= "/></td><td bgcolor='$color'>".
2851: qq{<label for="$id">}. $file . "</label></td>" .
1.32 bowersj2 2852: "<td bgcolor='$color'>$title</td>" .
2853: "<td bgcolor='$color'>$status</td>" . "</tr>\n";
1.5 bowersj2 2854: $choices++;
2855: }
2856: }
2857:
2858: $result .= "</table>\n";
2859:
2860: if (!$choices) {
1.47 albertel 2861: $result .= '<font color="#FF0000">There are no files available to select in this directory ('.$subdir.'). Please go back and select another option.</font><br /><br />';
1.5 bowersj2 2862: }
2863:
2864: $result .= $buttons;
2865:
2866: return $result;
1.20 bowersj2 2867: }
2868:
2869: # Determine the state of the file: Published, unpublished, modified.
2870: # Return the color it should be in and a label as a two-element array
2871: # reference.
2872: # Logic lifted from lonpubdir.pm, even though I don't know that it's still
2873: # the most right thing to do.
2874:
2875: sub fileState {
2876: my $constructionSpaceDir = shift;
2877: my $file = shift;
2878:
1.100 albertel 2879: my ($uname,$udom)=($env{'user.name'},$env{'user.domain'});
2880: if ($env{'request.role'}=~/^ca\./) {
2881: (undef,$udom,$uname)=split(/\//,$env{'request.role'});
1.86 albertel 2882: }
1.20 bowersj2 2883: my $docroot = $Apache::lonnet::perlvar{'lonDocRoot'};
2884: my $subdirpart = $constructionSpaceDir;
1.86 albertel 2885: $subdirpart =~ s/^\/home\/$uname\/public_html//;
2886: my $resdir = $docroot . '/res/' . $udom . '/' . $uname .
1.20 bowersj2 2887: $subdirpart;
2888:
2889: my @constructionSpaceFileStat = stat($constructionSpaceDir . '/' . $file);
2890: my @resourceSpaceFileStat = stat($resdir . '/' . $file);
2891: if (!@resourceSpaceFileStat) {
2892: return ['Unpublished', '#FFCCCC'];
2893: }
2894:
2895: my $constructionSpaceFileModified = $constructionSpaceFileStat[9];
2896: my $resourceSpaceFileModified = $resourceSpaceFileStat[9];
2897:
2898: if ($constructionSpaceFileModified > $resourceSpaceFileModified) {
2899: return ['Modified', '#FFFFCC'];
2900: }
2901: return ['Published', '#CCFFCC'];
1.4 bowersj2 2902: }
1.5 bowersj2 2903:
1.4 bowersj2 2904: sub postprocess {
2905: my $self = shift;
1.100 albertel 2906: my $result = $env{'form.' . $self->{'variable'} . '.forminput'};
1.6 bowersj2 2907: if (!$result) {
2908: $self->{ERROR_MSG} = 'You must choose at least one file '.
2909: 'to continue.';
2910: return 0;
2911: }
2912:
1.5 bowersj2 2913: if (defined($self->{NEXTSTATE})) {
2914: $helper->changeState($self->{NEXTSTATE});
1.3 bowersj2 2915: }
1.6 bowersj2 2916:
2917: return 1;
1.3 bowersj2 2918: }
1.8 bowersj2 2919:
2920: 1;
2921:
1.11 bowersj2 2922: package Apache::lonhelper::section;
2923:
2924: =pod
2925:
1.44 bowersj2 2926: =head2 Element: sectionX<section, helper element>
1.11 bowersj2 2927:
2928: <section> allows the user to choose one or more sections from the current
2929: course.
2930:
2931: It takes the standard attributes "variable", "multichoice", and
2932: "nextstate", meaning what they do for most other elements.
2933:
2934: =cut
2935:
2936: no strict;
2937: @ISA = ("Apache::lonhelper::choices");
2938: use strict;
2939:
2940: BEGIN {
2941: &Apache::lonhelper::register('Apache::lonhelper::section',
2942: ('section'));
2943: }
2944:
2945: sub new {
2946: my $ref = Apache::lonhelper::choices->new();
2947: bless($ref);
2948: }
2949:
2950: sub start_section {
2951: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
2952:
2953: if ($target ne 'helper') {
2954: return '';
2955: }
1.12 bowersj2 2956:
2957: $paramHash->{CHOICES} = [];
2958:
1.11 bowersj2 2959: $paramHash->{'variable'} = $token->[2]{'variable'};
2960: $helper->declareVar($paramHash->{'variable'});
2961: $paramHash->{'multichoice'} = $token->[2]{'multichoice'};
2962: if (defined($token->[2]{'nextstate'})) {
1.12 bowersj2 2963: $paramHash->{NEXTSTATE} = $token->[2]{'nextstate'};
1.11 bowersj2 2964: }
2965:
2966: # Populate the CHOICES element
2967: my %choices;
2968:
2969: my $section = Apache::loncoursedata::CL_SECTION();
2970: my $classlist = Apache::loncoursedata::get_classlist();
2971: foreach (keys %$classlist) {
2972: my $sectionName = $classlist->{$_}->[$section];
2973: if (!$sectionName) {
2974: $choices{"No section assigned"} = "";
2975: } else {
2976: $choices{$sectionName} = $sectionName;
2977: }
1.12 bowersj2 2978: }
2979:
1.11 bowersj2 2980: for my $sectionName (sort(keys(%choices))) {
1.12 bowersj2 2981:
1.11 bowersj2 2982: push @{$paramHash->{CHOICES}}, [$sectionName, $sectionName];
2983: }
2984: }
2985:
1.12 bowersj2 2986: sub end_section {
2987: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.11 bowersj2 2988:
1.12 bowersj2 2989: if ($target ne 'helper') {
2990: return '';
2991: }
2992: Apache::lonhelper::section->new();
2993: }
1.11 bowersj2 2994: 1;
2995:
1.128 raeburn 2996: package Apache::lonhelper::group;
2997:
2998: =pod
2999:
3000: =head2 Element: groupX<group, helper element>
3001:
3002: <section> allows the user to choose one or more groups from the current course.
3003:
3004: It takes the standard attributes "variable", "multichoice", and "nextstate", meaning what they do for most other elements.
3005:
3006: =cut
3007:
3008: no strict;
3009: @ISA = ("Apache::lonhelper::choices");
3010: use strict;
3011:
3012: BEGIN {
3013: &Apache::lonhelper::register('Apache::lonhelper::group',
3014: ('group'));
3015: }
3016:
3017: sub new {
3018: my $ref = Apache::lonhelper::choices->new();
3019: bless($ref);
3020: }
3021:
3022: sub start_group {
3023: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
3024:
3025: if ($target ne 'helper') {
3026: return '';
3027: }
3028:
3029: $paramHash->{CHOICES} = [];
3030:
3031: $paramHash->{'variable'} = $token->[2]{'variable'};
3032: $helper->declareVar($paramHash->{'variable'});
3033: $paramHash->{'multichoice'} = $token->[2]{'multichoice'};
3034: if (defined($token->[2]{'nextstate'})) {
3035: $paramHash->{NEXTSTATE} = $token->[2]{'nextstate'};
3036: }
3037:
3038: # Populate the CHOICES element
3039: my %choices;
3040:
3041: my $numgroups;
3042: my %curr_groups;
3043: if (&Apache::loncommon::coursegroups(\%curr_groups)) {
3044: foreach my $group_name (keys %curr_groups) {
3045: $choices{$group_name} = $group_name;
3046: }
3047: }
3048: foreach my $group_name (sort(keys(%choices))) {
3049: push @{$paramHash->{CHOICES}}, [$group_name, $group_name];
3050: }
3051: }
3052:
3053: sub end_group {
3054: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
3055:
3056: if ($target ne 'helper') {
3057: return '';
3058: }
3059: Apache::lonhelper::group->new();
3060: }
3061: 1;
3062:
1.34 bowersj2 3063: package Apache::lonhelper::string;
3064:
3065: =pod
3066:
1.44 bowersj2 3067: =head2 Element: stringX<string, helper element>
1.34 bowersj2 3068:
3069: string elements provide a string entry field for the user. string elements
3070: take the usual 'variable' and 'nextstate' parameters. string elements
3071: also pass through 'maxlength' and 'size' attributes to the input tag.
3072:
3073: string honors the defaultvalue tag, if given.
3074:
1.38 bowersj2 3075: string honors the validation function, if given.
3076:
1.34 bowersj2 3077: =cut
3078:
3079: no strict;
3080: @ISA = ("Apache::lonhelper::element");
3081: use strict;
1.76 sakharuk 3082: use Apache::lonlocal;
1.34 bowersj2 3083:
3084: BEGIN {
3085: &Apache::lonhelper::register('Apache::lonhelper::string',
3086: ('string'));
3087: }
3088:
3089: sub new {
3090: my $ref = Apache::lonhelper::element->new();
3091: bless($ref);
3092: }
3093:
3094: # CONSTRUCTION: Construct the message element from the XML
3095: sub start_string {
3096: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
3097:
3098: if ($target ne 'helper') {
3099: return '';
3100: }
3101:
3102: $paramHash->{'variable'} = $token->[2]{'variable'};
3103: $helper->declareVar($paramHash->{'variable'});
3104: $paramHash->{'nextstate'} = $token->[2]{'nextstate'};
3105: $paramHash->{'maxlength'} = $token->[2]{'maxlength'};
3106: $paramHash->{'size'} = $token->[2]{'size'};
3107:
3108: return '';
3109: }
3110:
3111: sub end_string {
3112: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
3113:
3114: if ($target ne 'helper') {
3115: return '';
3116: }
3117: Apache::lonhelper::string->new();
3118: return '';
3119: }
3120:
3121: sub render {
3122: my $self = shift;
1.38 bowersj2 3123: my $result = '';
3124:
3125: if (defined $self->{ERROR_MSG}) {
1.97 albertel 3126: $result .= '<p><font color="#FF0000">' . $self->{ERROR_MSG} . '</font></p>';
1.38 bowersj2 3127: }
3128:
3129: $result .= '<input type="string" name="' . $self->{'variable'} . '.forminput"';
1.34 bowersj2 3130:
3131: if (defined($self->{'size'})) {
3132: $result .= ' size="' . $self->{'size'} . '"';
3133: }
3134: if (defined($self->{'maxlength'})) {
3135: $result .= ' maxlength="' . $self->{'maxlength'} . '"';
3136: }
3137:
3138: if (defined($self->{DEFAULT_VALUE})) {
3139: my $valueFunc = eval($self->{DEFAULT_VALUE});
3140: die 'Error in default value code for variable ' .
3141: $self->{'variable'} . ', Perl said: ' . $@ if $@;
3142: $result .= ' value="' . &$valueFunc($helper, $self) . '"';
3143: }
3144:
3145: $result .= ' />';
3146:
3147: return $result;
3148: }
3149:
3150: # If a NEXTSTATE was given, switch to it
3151: sub postprocess {
3152: my $self = shift;
1.38 bowersj2 3153:
3154: if (defined($self->{VALIDATOR})) {
3155: my $validator = eval($self->{VALIDATOR});
3156: die 'Died during evaluation of evaulation code; Perl said: ' . $@ if $@;
3157: my $invalid = &$validator($helper, $state, $self, $self->getValue());
3158: if ($invalid) {
3159: $self->{ERROR_MSG} = $invalid;
3160: return 0;
3161: }
3162: }
3163:
3164: if (defined($self->{'nextstate'})) {
3165: $helper->changeState($self->{'nextstate'});
1.34 bowersj2 3166: }
3167:
3168: return 1;
3169: }
3170:
3171: 1;
3172:
1.8 bowersj2 3173: package Apache::lonhelper::general;
3174:
3175: =pod
3176:
1.44 bowersj2 3177: =head2 General-purpose tag: <exec>X<exec, helper tag>
1.8 bowersj2 3178:
1.44 bowersj2 3179: The contents of the exec tag are executed as Perl code, B<not> inside a
1.100 albertel 3180: safe space, so the full range of $env and such is available. The code
1.8 bowersj2 3181: will be executed as a subroutine wrapped with the following code:
3182:
3183: "sub { my $helper = shift; my $state = shift;" and
3184:
3185: "}"
3186:
3187: The return value is ignored.
3188:
3189: $helper is the helper object. Feel free to add methods to the helper
3190: object to support whatever manipulation you may need to do (for instance,
3191: overriding the form location if the state is the final state; see
1.44 bowersj2 3192: parameter.helper for an example).
1.8 bowersj2 3193:
3194: $state is the $paramHash that has currently been generated and may
3195: be manipulated by the code in exec. Note that the $state is not yet
3196: an actual state B<object>, it is just a hash, so do not expect to
3197: be able to call methods on it.
3198:
3199: =cut
3200:
1.83 sakharuk 3201: use Apache::lonlocal;
1.102 albertel 3202: use Apache::lonnet;
1.83 sakharuk 3203:
1.8 bowersj2 3204: BEGIN {
3205: &Apache::lonhelper::register('Apache::lonhelper::general',
1.11 bowersj2 3206: 'exec', 'condition', 'clause',
3207: 'eval');
1.8 bowersj2 3208: }
3209:
3210: sub start_exec {
3211: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
3212:
3213: if ($target ne 'helper') {
3214: return '';
3215: }
3216:
3217: my $code = &Apache::lonxml::get_all_text('/exec', $parser);
3218:
3219: $code = eval ('sub { my $helper = shift; my $state = shift; ' .
3220: $code . "}");
1.11 bowersj2 3221: die 'Error in <exec>, Perl said: '. $@ if $@;
1.8 bowersj2 3222: &$code($helper, $paramHash);
3223: }
3224:
3225: sub end_exec { return ''; }
3226:
3227: =pod
3228:
3229: =head2 General-purpose tag: <condition>
3230:
3231: The <condition> tag allows you to mask out parts of the helper code
3232: depending on some programatically determined condition. The condition
3233: tag contains a tag <clause> which contains perl code that when wrapped
3234: with "sub { my $helper = shift; my $state = shift; " and "}", returns
3235: a true value if the XML in the condition should be evaluated as a normal
3236: part of the helper, or false if it should be completely discarded.
3237:
3238: The <clause> tag must be the first sub-tag of the <condition> tag or
3239: it will not work as expected.
3240:
3241: =cut
3242:
3243: # The condition tag just functions as a marker, it doesn't have
3244: # to "do" anything. Technically it doesn't even have to be registered
3245: # with the lonxml code, but I leave this here to be explicit about it.
3246: sub start_condition { return ''; }
3247: sub end_condition { return ''; }
3248:
3249: sub start_clause {
3250: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
3251:
3252: if ($target ne 'helper') {
3253: return '';
3254: }
3255:
3256: my $clause = Apache::lonxml::get_all_text('/clause', $parser);
3257: $clause = eval('sub { my $helper = shift; my $state = shift; '
3258: . $clause . '}');
1.11 bowersj2 3259: die 'Error in clause of condition, Perl said: ' . $@ if $@;
1.8 bowersj2 3260: if (!&$clause($helper, $paramHash)) {
3261: # Discard all text until the /condition.
3262: &Apache::lonxml::get_all_text('/condition', $parser);
3263: }
3264: }
3265:
3266: sub end_clause { return ''; }
1.11 bowersj2 3267:
3268: =pod
3269:
1.44 bowersj2 3270: =head2 General-purpose tag: <eval>X<eval, helper tag>
1.11 bowersj2 3271:
3272: The <eval> tag will be evaluated as a subroutine call passed in the
3273: current helper object and state hash as described in <condition> above,
3274: but is expected to return a string to be printed directly to the
3275: screen. This is useful for dynamically generating messages.
3276:
3277: =cut
3278:
3279: # This is basically a type of message.
3280: # Programmatically setting $paramHash->{NEXTSTATE} would work, though
3281: # it's probably bad form.
3282:
3283: sub start_eval {
3284: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
3285:
3286: if ($target ne 'helper') {
3287: return '';
3288: }
3289:
3290: my $program = Apache::lonxml::get_all_text('/eval', $parser);
3291: $program = eval('sub { my $helper = shift; my $state = shift; '
3292: . $program . '}');
3293: die 'Error in eval code, Perl said: ' . $@ if $@;
3294: $paramHash->{MESSAGE_TEXT} = &$program($helper, $paramHash);
3295: }
3296:
3297: sub end_eval {
3298: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
3299:
3300: if ($target ne 'helper') {
3301: return '';
3302: }
3303:
3304: Apache::lonhelper::message->new();
3305: }
3306:
1.13 bowersj2 3307: 1;
3308:
1.27 bowersj2 3309: package Apache::lonhelper::final;
3310:
3311: =pod
3312:
1.44 bowersj2 3313: =head2 Element: finalX<final, helper tag>
1.27 bowersj2 3314:
3315: <final> is a special element that works with helpers that use the <finalcode>
1.44 bowersj2 3316: tagX<finalcode, helper tag>. It goes through all the states and elements, executing the <finalcode>
1.27 bowersj2 3317: snippets and collecting the results. Finally, it takes the user out of the
3318: helper, going to a provided page.
3319:
1.34 bowersj2 3320: If the parameter "restartCourse" is true, this will override the buttons and
3321: will make a "Finish Helper" button that will re-initialize the course for them,
3322: which is useful for the Course Initialization helper so the users never see
3323: the old values taking effect.
3324:
1.93 albertel 3325: If the parameter "restartCourse" is not true a 'Finish' Button will be
3326: presented that takes the user back to whatever was defined as <exitpage>
3327:
1.27 bowersj2 3328: =cut
3329:
3330: no strict;
3331: @ISA = ("Apache::lonhelper::element");
3332: use strict;
1.62 matthew 3333: use Apache::lonlocal;
1.100 albertel 3334: use Apache::lonnet;
1.27 bowersj2 3335: BEGIN {
3336: &Apache::lonhelper::register('Apache::lonhelper::final',
3337: ('final', 'exitpage'));
3338: }
3339:
3340: sub new {
3341: my $ref = Apache::lonhelper::element->new();
3342: bless($ref);
3343: }
3344:
1.34 bowersj2 3345: sub start_final {
3346: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
3347:
3348: if ($target ne 'helper') {
3349: return '';
3350: }
3351:
3352: $paramHash->{'restartCourse'} = $token->[2]{'restartCourse'};
3353:
3354: return '';
3355: }
1.27 bowersj2 3356:
3357: sub end_final {
3358: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
3359:
3360: if ($target ne 'helper') {
3361: return '';
3362: }
3363:
3364: Apache::lonhelper::final->new();
3365:
3366: return '';
3367: }
3368:
3369: sub start_exitpage {
3370: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
3371:
3372: if ($target ne 'helper') {
3373: return '';
3374: }
3375:
3376: $paramHash->{EXIT_PAGE} = &Apache::lonxml::get_all_text('/exitpage',
3377: $parser);
3378:
3379: return '';
3380: }
3381:
3382: sub end_exitpage { return ''; }
3383:
3384: sub render {
3385: my $self = shift;
3386:
3387: my @results;
3388:
3389: # Collect all the results
3390: for my $stateName (keys %{$helper->{STATES}}) {
3391: my $state = $helper->{STATES}->{$stateName};
3392:
3393: for my $element (@{$state->{ELEMENTS}}) {
3394: if (defined($element->{FINAL_CODE})) {
3395: # Compile the code.
1.31 bowersj2 3396: my $code = 'sub { my $helper = shift; my $element = shift; '
3397: . $element->{FINAL_CODE} . '}';
1.27 bowersj2 3398: $code = eval($code);
3399: die 'Error while executing final code for element with var ' .
3400: $element->{'variable'} . ', Perl said: ' . $@ if $@;
3401:
1.31 bowersj2 3402: my $result = &$code($helper, $element);
1.27 bowersj2 3403: if ($result) {
3404: push @results, $result;
3405: }
3406: }
3407: }
3408: }
3409:
1.40 bowersj2 3410: my $result;
1.27 bowersj2 3411:
1.40 bowersj2 3412: if (scalar(@results) != 0) {
3413: $result .= "<ul>\n";
3414: for my $re (@results) {
3415: $result .= ' <li>' . $re . "</li>\n";
3416: }
3417:
3418: if (!@results) {
1.59 bowersj2 3419: $result .= ' <li>' .
3420: &mt('No changes were made to current settings.') . '</li>';
1.40 bowersj2 3421: }
3422:
3423: $result .= '</ul>';
1.34 bowersj2 3424: }
3425:
1.93 albertel 3426: my $actionURL = $self->{EXIT_PAGE};
3427: my $targetURL = '';
3428: my $finish=&mt('Finish');
1.34 bowersj2 3429: if ($self->{'restartCourse'}) {
1.103 albertel 3430: $actionURL = '/adm/roles';
1.93 albertel 3431: $targetURL = '/adm/menu';
1.100 albertel 3432: if ($env{'course.'.$env{'request.course.id'}.'.url'}=~/^uploaded/) {
1.64 albertel 3433: $targetURL = '/adm/coursedocs';
3434: } else {
3435: $targetURL = '/adm/navmaps';
3436: }
1.100 albertel 3437: if ($env{'course.'.$env{'request.course.id'}.'.clonedfrom'}) {
1.45 bowersj2 3438: $targetURL = '/adm/parmset?overview=1';
3439: }
1.93 albertel 3440: my $finish=&mt('Finish Course Initialization');
1.34 bowersj2 3441: }
1.93 albertel 3442: my $previous = HTML::Entities::encode(&mt("<- Previous"), '<>&"');
3443: my $next = HTML::Entities::encode(&mt("Next ->"), '<>&"');
1.127 albertel 3444: my $target = " target='loncapaclient'";
3445: if (($env{'browser.interface'} eq 'textual') ||
3446: ($env{'environment.remote'} eq 'off')) { $target=''; }
1.93 albertel 3447: $result .= "<center>\n" .
1.127 albertel 3448: "<form action='".$actionURL."' method='post' $target>\n" .
1.93 albertel 3449: "<input type='button' onclick='history.go(-1)' value='$previous' />" .
3450: "<input type='hidden' name='orgurl' value='$targetURL' />" .
3451: "<input type='hidden' name='selectrole' value='1' />\n" .
1.100 albertel 3452: "<input type='hidden' name='" . $env{'request.role'} .
1.93 albertel 3453: "' value='1' />\n<input type='submit' value='" . $finish . "' />\n" .
3454: "</form></center>";
1.34 bowersj2 3455:
1.40 bowersj2 3456: return $result;
1.34 bowersj2 3457: }
3458:
3459: sub overrideForm {
1.93 albertel 3460: return 1;
1.27 bowersj2 3461: }
3462:
3463: 1;
3464:
1.13 bowersj2 3465: package Apache::lonhelper::parmwizfinal;
3466:
3467: # This is the final state for the parmwizard. It is not generally useful,
3468: # so it is not perldoc'ed. It does its own processing.
3469: # It is represented with <parmwizfinal />, and
3470: # should later be moved to lonparmset.pm .
3471:
3472: no strict;
3473: @ISA = ('Apache::lonhelper::element');
3474: use strict;
1.69 sakharuk 3475: use Apache::lonlocal;
1.102 albertel 3476: use Apache::lonnet;
1.11 bowersj2 3477:
1.13 bowersj2 3478: BEGIN {
3479: &Apache::lonhelper::register('Apache::lonhelper::parmwizfinal',
3480: ('parmwizfinal'));
3481: }
3482:
3483: use Time::localtime;
3484:
3485: sub new {
3486: my $ref = Apache::lonhelper::choices->new();
3487: bless ($ref);
3488: }
3489:
3490: sub start_parmwizfinal { return ''; }
3491:
3492: sub end_parmwizfinal {
3493: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
3494:
3495: if ($target ne 'helper') {
3496: return '';
3497: }
3498: Apache::lonhelper::parmwizfinal->new();
3499: }
3500:
3501: # Renders a form that, when submitted, will form the input to lonparmset.pm
3502: sub render {
3503: my $self = shift;
3504: my $vars = $helper->{VARS};
3505:
3506: # FIXME: Unify my designators with the standard ones
1.48 bowersj2 3507: my %dateTypeHash = ('open_date' => "opening date",
3508: 'due_date' => "due date",
3509: 'answer_date' => "answer date",
3510: 'tries' => 'number of tries',
3511: 'weight' => 'problem weight'
1.38 bowersj2 3512: );
1.13 bowersj2 3513: my %parmTypeHash = ('open_date' => "0_opendate",
3514: 'due_date' => "0_duedate",
1.38 bowersj2 3515: 'answer_date' => "0_answerdate",
1.48 bowersj2 3516: 'tries' => '0_maxtries',
3517: 'weight' => '0_weight' );
1.107 albertel 3518: my %realParmName = ('open_date' => "opendate",
3519: 'due_date' => "duedate",
3520: 'answer_date' => "answerdate",
3521: 'tries' => 'maxtries',
3522: 'weight' => 'weight' );
1.13 bowersj2 3523:
3524: my $affectedResourceId = "";
3525: my $parm_name = $parmTypeHash{$vars->{ACTION_TYPE}};
3526: my $level = "";
1.27 bowersj2 3527: my $resourceString;
3528: my $symb;
3529: my $paramlevel;
1.95 albertel 3530:
1.13 bowersj2 3531: # Print the granularity, depending on the action
3532: if ($vars->{GRANULARITY} eq 'whole_course') {
1.76 sakharuk 3533: $resourceString .= '<li>'.&mt('for <b>all resources in the course</b>').'</li>';
1.104 albertel 3534: if ($vars->{TARGETS} eq 'course') {
3535: $level = 11; # general course, see lonparmset.pm perldoc
3536: } elsif ($vars->{TARGETS} eq 'section') {
3537: $level = 6;
3538: } else {
3539: $level = 3;
3540: }
1.13 bowersj2 3541: $affectedResourceId = "0.0";
1.27 bowersj2 3542: $symb = 'a';
3543: $paramlevel = 'general';
1.13 bowersj2 3544: } elsif ($vars->{GRANULARITY} eq 'map') {
1.41 bowersj2 3545: my $navmap = Apache::lonnavmaps::navmap->new();
1.35 bowersj2 3546: my $res = $navmap->getByMapPc($vars->{RESOURCE_ID});
1.13 bowersj2 3547: my $title = $res->compTitle();
1.27 bowersj2 3548: $symb = $res->symb();
1.78 sakharuk 3549: $resourceString .= '<li>'.&mt('for the map named [_1]',"<b>$title</b>").'</li>';
1.104 albertel 3550: if ($vars->{TARGETS} eq 'course') {
3551: $level = 10; # general course, see lonparmset.pm perldoc
3552: } elsif ($vars->{TARGETS} eq 'section') {
3553: $level = 5;
3554: } else {
3555: $level = 2;
3556: }
1.13 bowersj2 3557: $affectedResourceId = $vars->{RESOURCE_ID};
1.27 bowersj2 3558: $paramlevel = 'map';
1.13 bowersj2 3559: } else {
1.41 bowersj2 3560: my $navmap = Apache::lonnavmaps::navmap->new();
1.13 bowersj2 3561: my $res = $navmap->getById($vars->{RESOURCE_ID});
1.95 albertel 3562: my $part = $vars->{RESOURCE_ID_part};
3563: if ($part ne 'All Parts' && $part) { $parm_name=~s/^0/$part/; } else { $part=&mt('All Parts'); }
1.27 bowersj2 3564: $symb = $res->symb();
1.13 bowersj2 3565: my $title = $res->compTitle();
1.95 albertel 3566: $resourceString .= '<li>'.&mt('for the resource named [_1] part [_2]',"<b>$title</b>","<b>$part</b>").'</li>';
1.104 albertel 3567: if ($vars->{TARGETS} eq 'course') {
3568: $level = 7; # general course, see lonparmset.pm perldoc
3569: } elsif ($vars->{TARGETS} eq 'section') {
3570: $level = 4;
3571: } else {
3572: $level = 1;
3573: }
1.13 bowersj2 3574: $affectedResourceId = $vars->{RESOURCE_ID};
1.27 bowersj2 3575: $paramlevel = 'full';
1.13 bowersj2 3576: }
3577:
1.105 albertel 3578: my $result = "<form name='helpform' method='POST' action='/adm/parmset#$affectedResourceId&$parm_name&$level'>\n";
1.104 albertel 3579: $result .= "<input type='hidden' name='action' value='settable' />\n";
3580: $result .= "<input type='hidden' name='dis' value='helper' />\n";
1.107 albertel 3581: $result .= "<input type='hidden' name='pscat' value='".
3582: $realParmName{$vars->{ACTION_TYPE}}."' />\n";
1.95 albertel 3583: if ($vars->{GRANULARITY} eq 'resource') {
3584: $result .= "<input type='hidden' name='symb' value='".
3585: HTML::Entities::encode($symb,"'<>&\"") . "' />\n";
1.108 albertel 3586: } elsif ($vars->{GRANULARITY} eq 'map') {
3587: $result .= "<input type='hidden' name='pschp' value='".
3588: $affectedResourceId."' />\n";
1.95 albertel 3589: }
1.104 albertel 3590: my $part = $vars->{RESOURCE_ID_part};
3591: if ($part eq 'All Parts' || !$part) { $part=0; }
3592: $result .= "<input type='hidden' name='psprt' value='".
3593: HTML::Entities::encode($part,"'<>&\"") . "' />\n";
3594:
1.69 sakharuk 3595: $result .= '<p>'.&mt('Confirm that this information is correct, then click "Finish Helper" to complete setting the parameter.').'<ul>';
1.27 bowersj2 3596:
3597: # Print the type of manipulation:
1.73 albertel 3598: my $extra;
1.38 bowersj2 3599: if ($vars->{ACTION_TYPE} eq 'tries') {
1.73 albertel 3600: $extra = $vars->{TRIES};
1.38 bowersj2 3601: }
1.48 bowersj2 3602: if ($vars->{ACTION_TYPE} eq 'weight') {
1.73 albertel 3603: $extra = $vars->{WEIGHT};
3604: }
3605: $result .= "<li>";
1.74 matthew 3606: my $what = &mt($dateTypeHash{$vars->{ACTION_TYPE}});
1.73 albertel 3607: if ($extra) {
3608: $result .= &mt('Setting the [_1] to [_2]',"<b>$what</b>",$extra);
3609: } else {
3610: $result .= &mt('Setting the [_1]',"<b>$what</b>");
1.48 bowersj2 3611: }
1.38 bowersj2 3612: $result .= "</li>\n";
1.27 bowersj2 3613: if ($vars->{ACTION_TYPE} eq 'due_date' ||
3614: $vars->{ACTION_TYPE} eq 'answer_date') {
3615: # for due dates, we default to "date end" type entries
3616: $result .= "<input type='hidden' name='recent_date_end' " .
3617: "value='" . $vars->{PARM_DATE} . "' />\n";
3618: $result .= "<input type='hidden' name='pres_value' " .
3619: "value='" . $vars->{PARM_DATE} . "' />\n";
3620: $result .= "<input type='hidden' name='pres_type' " .
3621: "value='date_end' />\n";
3622: } elsif ($vars->{ACTION_TYPE} eq 'open_date') {
3623: $result .= "<input type='hidden' name='recent_date_start' ".
3624: "value='" . $vars->{PARM_DATE} . "' />\n";
3625: $result .= "<input type='hidden' name='pres_value' " .
3626: "value='" . $vars->{PARM_DATE} . "' />\n";
3627: $result .= "<input type='hidden' name='pres_type' " .
3628: "value='date_start' />\n";
1.38 bowersj2 3629: } elsif ($vars->{ACTION_TYPE} eq 'tries') {
3630: $result .= "<input type='hidden' name='pres_value' " .
3631: "value='" . $vars->{TRIES} . "' />\n";
1.104 albertel 3632: $result .= "<input type='hidden' name='pres_type' " .
3633: "value='int_pos' />\n";
1.48 bowersj2 3634: } elsif ($vars->{ACTION_TYPE} eq 'weight') {
3635: $result .= "<input type='hidden' name='pres_value' " .
3636: "value='" . $vars->{WEIGHT} . "' />\n";
1.38 bowersj2 3637: }
1.27 bowersj2 3638:
3639: $result .= $resourceString;
3640:
1.13 bowersj2 3641: # Print targets
3642: if ($vars->{TARGETS} eq 'course') {
1.76 sakharuk 3643: $result .= '<li>'.&mt('for <b>all students in course</b>').'</li>';
1.13 bowersj2 3644: } elsif ($vars->{TARGETS} eq 'section') {
3645: my $section = $vars->{SECTION_NAME};
1.79 sakharuk 3646: $result .= '<li>'.&mt('for section [_1]',"<b>$section</b>").'</li>';
1.104 albertel 3647: $result .= "<input type='hidden' name='csec' value='" .
1.89 foxr 3648: HTML::Entities::encode($section,"'<>&\"") . "' />\n";
1.128 raeburn 3649: } elsif ($vars->{TARGETS} eq 'group') {
3650: my $group = $vars->{GROUP_NAME};
3651: $result .= '<li>'.&mt('for group [_1]',"<b>$group</b>").'</li>';
3652: $result .= "<input type='hidden' name='cgroup' value='" .
3653: HTML::Entities::encode($group,"'<>&\"") . "' />\n";
1.13 bowersj2 3654: } else {
3655: # FIXME: This is probably wasteful! Store the name!
3656: my $classlist = Apache::loncoursedata::get_classlist();
1.109 albertel 3657: my ($uname,$udom)=split(':',$vars->{USER_NAME});
1.106 albertel 3658: my $name = $classlist->{$uname.':'.$udom}->[6];
1.79 sakharuk 3659: $result .= '<li>'.&mt('for [_1]',"<b>$name</b>").'</li>';
1.13 bowersj2 3660: $result .= "<input type='hidden' name='uname' value='".
1.89 foxr 3661: HTML::Entities::encode($uname,"'<>&\"") . "' />\n";
1.13 bowersj2 3662: $result .= "<input type='hidden' name='udom' value='".
1.89 foxr 3663: HTML::Entities::encode($udom,"'<>&\"") . "' />\n";
1.13 bowersj2 3664: }
3665:
3666: # Print value
1.48 bowersj2 3667: if ($vars->{ACTION_TYPE} ne 'tries' && $vars->{ACTION_TYPE} ne 'weight') {
1.81 sakharuk 3668: $result .= '<li>'.&mt('to [_1] ([_2])',"<b>".ctime($vars->{PARM_DATE})."</b>",Apache::lonnavmaps::timeToHumanString($vars->{PARM_DATE}))."</li>\n";
1.38 bowersj2 3669: }
3670:
1.13 bowersj2 3671: # print pres_marker
3672: $result .= "\n<input type='hidden' name='pres_marker'" .
3673: " value='$affectedResourceId&$parm_name&$level' />\n";
1.27 bowersj2 3674:
3675: # Make the table appear
3676: $result .= "\n<input type='hidden' value='true' name='prevvisit' />";
3677: $result .= "\n<input type='hidden' value='$symb' name='pssymb' />";
3678: $result .= "\n<input type='hidden' value='$paramlevel' name='parmlev' />";
1.13 bowersj2 3679:
1.71 sakharuk 3680: $result .= "<br /><br /><center><input type='submit' value='".&mt('Finish Helper')."' /></center></form>\n";
1.13 bowersj2 3681:
3682: return $result;
3683: }
3684:
3685: sub overrideForm {
3686: return 1;
3687: }
1.5 bowersj2 3688:
1.4 bowersj2 3689: 1;
1.3 bowersj2 3690:
1.1 bowersj2 3691: __END__
1.3 bowersj2 3692:
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