Annotation of loncom/interface/lonwizard.pm, revision 1.18
1.1 bowersj2 1: # This is the LON-CAPA HTML Wizard framework, for wrapping easy
2: # functionality easily.
3:
4: package Apache::lonwizard;
5:
6: use Apache::Constants qw(:common :http);
7: use Apache::loncommon;
1.4 bowersj2 8: use Apache::lonnet;
1.1 bowersj2 9:
10: =head1 lonwizard - HTML "Wizard" framework for LON-CAPA
11:
1.15 bowersj2 12: Wizards are a well-established UI widget that users feel comfortable with. It can take a complicated multi-dimensional problem the user has (such as the canonical Course Parameter example) and turn in into a series of bite-sized one-dimensional questions. Or take the some four-question form and put it in a Wizard, and present the same user with the same form outside of the Wizard, and the user will *think* the Wizard is easier.
1.1 bowersj2 13:
1.15 bowersj2 14: For the developer, wizards do provide an easy way to bundle easy bits of functionality for the user, without having to write the tedious code for maintaining state between frames. It can be easier to write a Wizard then provide another custom interface.
1.1 bowersj2 15:
16: All classes are in the Apache::lonwizard namespace.
17:
18: (For a perldoc'ed example of a wizard you can use as an example, see loncourseparmwizard.pm.)
19:
20: =cut
21:
22: # To prevent runaway file counts, this file has lonwizard,
23: # lonwizstate, and other wizard classes.
24: use strict;
25:
26: use HTML::Entities;
1.10 bowersj2 27: use Apache::loncommon;
1.18 ! bowersj2 28: use Digest::MD5 qw(md5_hex);
! 29: use Apache::File;
1.1 bowersj2 30:
31: =pod
32:
33: =head1 Class: lonwizard
34:
1.12 bowersj2 35: FIXME: Doc the parameters of the wizard well: Title, Data (Query string), URL.
36:
1.1 bowersj2 37: =head2 lonwizard Attributes
38:
39: =over 4
40:
41: =item B<STATE>: The string name of the current state.
42:
43: =item B<TITLE>: The human-readable title of the wizard
44:
45: =item B<STATES>: A hash mapping the string names of states to references to the actual states.
46:
47: =item B<VARS>: Hash that maintains the persistent variable values.
48:
49: =item B<HISTORY>: An array containing the names of the previous states. Used for "back" functionality.
50:
51: =item B<DONE>: A boolean value, true if the wizard has completed.
52:
1.10 bowersj2 53: =item B<DATA>: The data the wizard is drawing from, which will be passed to Apache::loncommon::get_unprocessed_cgi, and may be used by states that do multi-selection.
54:
1.1 bowersj2 55: =back
56:
57: =cut
58:
59: sub new {
60: my $proto = shift;
61: my $class = ref($proto) || $proto;
62: my $self = {};
63:
1.10 bowersj2 64: $self->{TITLE} = shift;
65: $self->{DATA} = shift;
1.12 bowersj2 66: $self->{URL} = shift;
1.10 bowersj2 67: &Apache::loncommon::get_unprocessed_cgi($self->{DATA});
68:
69:
1.1 bowersj2 70: # If there is a state from the previous form, use that. If there is no
71: # state, use the start state parameter.
72: if (defined $ENV{"form.CURRENT_STATE"})
73: {
74: $self->{STATE} = $ENV{"form.CURRENT_STATE"};
75: }
76: else
77: {
78: $self->{STATE} = "START";
79: }
80:
1.18 ! bowersj2 81: $self->{TOKEN} = $ENV{'form.TOKEN'};
! 82: # If a token was passed, we load that in. Otherwise, we need to create a
! 83: # new storage file
! 84: # Tried to use standard Tie'd hashes, but you can't seem to take a
! 85: # reference to a tied hash and write to it. I'd call that a wart.
! 86: if ($self->{TOKEN}) {
! 87: # Validate the token before trusting it
! 88: if ($self->{TOKEN} !~ /^[a-f0-9]{32}$/) {
! 89: # Not legit. Return nothing and let all hell break loose.
! 90: # User shouldn't be doing that!
! 91: return undef;
! 92: }
! 93:
! 94: # Get the hash.
! 95: $self->{FILENAME} = $Apache::lonnet::tmpdir . md5_hex($self->{TOKEN}); # Note the token is not the literal file
! 96:
! 97: my $file = Apache::File->new($self->{FILENAME});
! 98: my $contents = <$file>;
! 99: &Apache::loncommon::get_unprocessed_cgi($contents);
! 100: $file->close();
! 101:
! 102: # Marks whether this is a new wizard.
! 103: $self->{NEW_WIZARD} = 0;
! 104: } else {
! 105: # Only valid if we're just starting.
! 106: if ($self->{STATE} ne 'START') {
! 107: return undef;
! 108: }
! 109: # Must create the storage
! 110: $self->{TOKEN} = md5_hex($ENV{'user.name'} . $ENV{'user.domain'} .
! 111: time() . rand());
! 112: $self->{FILENAME} = $Apache::lonnet::tmpdir . md5_hex($self->{TOKEN});
! 113:
! 114: # Marks whether this is a new wizard.
! 115: $self->{NEW_WIZARD} = 1;
! 116: }
! 117:
! 118: # OK, we now have our persistent storage.
! 119:
1.1 bowersj2 120: if (defined $ENV{"form.RETURN_PAGE"})
121: {
122: $self->{RETURN_PAGE} = $ENV{"form.RETURN_PAGE"};
123: }
124: else
125: {
126: $self->{RETURN_PAGE} = $ENV{REFERER};
127: }
128:
129: $self->{STATES} = {};
130: $self->{HISTORY} = {};
131: $self->{DONE} = 0;
1.10 bowersj2 132:
1.1 bowersj2 133: bless($self, $class);
134: return $self;
135: }
136:
137: =pod
138:
139: =head2 lonwizard methods
140:
141: =over 2
142:
1.3 bowersj2 143: =item * B<new>(title): Returns a new instance of the given wizard type. "title" is the human-readable name of the wizard. A new wizard always starts on the B<START> state name.
1.1 bowersj2 144:
1.10 bowersj2 145: =item * B<declareVars>(varList): Call this function to declare the var names you want the wizard to maintain for you. The wizard will automatically output the hidden form fields and parse the values for you on the next call.
1.1 bowersj2 146:
147: =over 2
148:
1.10 bowersj2 149: =item * B<Note>: These form variables are reserved for the wizard; if you output other form values in your state, you must use other names. For example, declaring "student" will cause the wizard to emit a form value with the name "student"; if your state emits form entries, do not name them "student". If you use the variable name followed by '.forminput', the wizard will automatically store the user's choice in the appropriate form variable.
150:
151: =item * B<Note>: If you want to preserve incoming form values, such as ones from the remote, you can simply declare them and the wizard will automatically preserve them. For instance, you might want to store 'url' or 'postdata' from the remote; see lonprintout for example.
1.1 bowersj2 152:
153: =back
154:
155: =cut
156:
1.7 bowersj2 157: # Sometimes the wizard writer will want to use the result of the previous
158: # state to change the text of the next state. In order to do that, it
159: # has to be done during the declaration of the states, or it won't be
160: # available. Therefore, basic form processing must occur before the
161: # actual display routine is called and the actual pre-process is called,
162: # or it won't be available.
163: # This also factors common code out of the preprocess calls.
1.1 bowersj2 164: sub declareVars {
165: my $self = shift;
166: my $varlist = shift;
167:
168: # for each string in the passed in list,
169: foreach my $element ( @{$varlist} )
170: {
171: # assign the var the default of ""
1.18 ! bowersj2 172: $self->{VARS}->{$element} = "";
1.1 bowersj2 173:
1.18 ! bowersj2 174: my $envname;
1.7 bowersj2 175:
1.18 ! bowersj2 176: $envname = "form." . $element;
! 177: if (defined ($ENV{$envname})) {
! 178: $self->{VARS}->{$element} = $ENV{$envname};
! 179: }
! 180:
1.7 bowersj2 181: # If there's an incoming form submission, use that
1.9 bowersj2 182: $envname = "form." . $element . ".forminput";
1.7 bowersj2 183: if (defined ($ENV{$envname})) {
184: $self->{VARS}->{$element} = $ENV{$envname};
185: }
1.1 bowersj2 186: }
187: }
188:
1.18 ! bowersj2 189: # Private function; returns a string to construct the hidden fields
! 190: # necessary to have the wizard track state.
1.1 bowersj2 191: sub _saveVars {
192: my $self = shift;
193: my $result = "";
194: $result .= '<input type="hidden" name="CURRENT_STATE" value="' .
1.18 ! bowersj2 195: HTML::Entities::encode($self->{STATE}) . "\" />\n";
! 196: $result .= '<input type="hidden" name="TOKEN" value="' .
! 197: $self->{TOKEN} . "\" />\n";
1.1 bowersj2 198: $result .= '<input type="hidden" name="RETURN_PAGE" value="' .
1.18 ! bowersj2 199: HTML::Entities::encode($self->{RETURN_PAGE}) . "\" />\n";
1.1 bowersj2 200:
201: return $result;
202: }
203:
1.18 ! bowersj2 204: # Private function: Create the querystring-like representation of the stored
! 205: # data to write to disk.
! 206: sub _varsInFile {
! 207: my $self = shift;
! 208: my @vars = ();
! 209: for my $key (keys %{$self->{VARS}}) {
! 210: push @vars, &Apache::lonnet::escape($key) . '=' .
! 211: &Apache::lonnet::escape($self->{VARS}->{$key});
! 212: }
! 213: return join ('&', @vars);
! 214: }
! 215:
1.1 bowersj2 216: =pod
217:
1.15 bowersj2 218: =item B<registerState>(referenceToStateObj): Registers a state as part of the wizard, so the wizard can use it. The 'referenceToStateObj' should be a reference to an instantiated lonwizstate object. This is normally called at the end of the lonwizard::state constructor, so you should not normally need it as a user.
1.1 bowersj2 219:
220: =cut
221:
222: sub registerState {
223: my $self = shift;
224: my $state = shift;
225:
226: my $stateName = $state->name();
227: $self->{STATES}{$stateName} = $state;
228: }
229:
230: =pod
231:
232: =item B<changeState>(stateName): Given a string representing the name of some registered state, this causes the wizard to change to that state. Generally, states will call this.
233:
234: =cut
235:
236: sub changeState {
237: my $self = shift;
238: $self->{STATE} = shift;
239: }
240:
241: =pod
242:
1.18 ! bowersj2 243: =item B<display>(): This is the main method that the handler using the wizard calls. It must always be called, and called last, because it takes care of closing a hash that needs to be closed.
! 244: sxsd
1.1 bowersj2 245: =cut
246:
1.15 bowersj2 247: # Done in four phases
1.1 bowersj2 248: # 1: Do the post processing for the previous state.
249: # 2: Do the preprocessing for the current state.
250: # 3: Check to see if state changed, if so, postprocess current and move to next.
251: # Repeat until state stays stable.
252: # 4: Render the current state to the screen as an HTML page.
253: sub display {
254: my $self = shift;
255:
256: my $result = "";
257:
258: # Phase 1: Post processing for state of previous screen (which is actually
1.15 bowersj2 259: # the "current state" in terms of the wizard variables), if it wasn't the
260: # beginning state.
261: if ($self->{STATE} ne "START" || $ENV{"form.SUBMIT"} eq "Next ->") {
1.1 bowersj2 262: my $prevState = $self->{STATES}{$self->{STATE}};
1.12 bowersj2 263: $prevState->postprocess();
1.1 bowersj2 264: }
265:
266: # Note, to handle errors in a state's input that a user must correct,
267: # do not transition in the postprocess, and force the user to correct
268: # the error.
269:
270: # Phase 2: Preprocess current state
271: my $startState = $self->{STATE};
272: my $state = $self->{STATES}{$startState};
1.3 bowersj2 273:
1.15 bowersj2 274: # Error checking; it is intended that the developer will have
275: # checked all paths and the user can't see this!
1.3 bowersj2 276: if (!defined($state)) {
277: $result .="Error! The state ". $startState ." is not defined.";
278: return $result;
279: }
1.1 bowersj2 280: $state->preprocess();
281:
282: # Phase 3: While the current state is different from the previous state,
283: # keep processing.
284: while ( $startState ne $self->{STATE} )
285: {
286: $startState = $self->{STATE};
287: $state = $self->{STATES}{$startState};
288: $state->preprocess();
289: }
290:
291: # Phase 4: Display.
292: my $stateTitle = $state->title();
1.3 bowersj2 293: my $bodytag = &Apache::loncommon::bodytag("$self->{TITLE}",'','');
1.1 bowersj2 294:
295: $result .= <<HEADER;
296: <html>
297: <head>
1.3 bowersj2 298: <title>LON-CAPA Wizard: $self->{TITLE}</title>
1.1 bowersj2 299: </head>
1.3 bowersj2 300: $bodytag
301: HEADER
1.10 bowersj2 302: if (!$state->overrideForm()) { $result.="<form name='wizform' method='GET'>"; }
1.3 bowersj2 303: $result .= <<HEADER;
304: <table border="0"><tr><td>
305: <h2><i>$stateTitle</i></h2>
1.1 bowersj2 306: HEADER
307:
1.3 bowersj2 308: if (!$state->overrideForm()) {
309: $result .= $self->_saveVars();
310: }
1.1 bowersj2 311: $result .= $state->render() . "<p> </p>";
312:
1.3 bowersj2 313: if (!$state->overrideForm()) {
314: $result .= '<center>';
1.15 bowersj2 315: if ($self->{STATE} ne $self->{START_STATE}) {
1.3 bowersj2 316: #$result .= '<input name="SUBMIT" type="submit" value="<- Previous" /> ';
317: }
1.16 bowersj2 318: if ($self->{DONE}) {
1.3 bowersj2 319: my $returnPage = $self->{RETURN_PAGE};
320: $result .= "<a href=\"$returnPage\">End Wizard</a>";
321: }
1.15 bowersj2 322: else {
1.4 bowersj2 323: $result .= '<input name="back" type="button" ';
324: $result .= 'value="<- Previous" onclick="history.go(-1)" /> ';
1.3 bowersj2 325: $result .= '<input name="SUBMIT" type="submit" value="Next ->" />';
326: }
327: $result .= "</center>\n";
1.1 bowersj2 328: }
329:
330: $result .= <<FOOTER;
1.3 bowersj2 331: </td>
332: </tr>
333: </table>
1.1 bowersj2 334: </form>
335: </body>
336: </html>
337: FOOTER
1.3 bowersj2 338:
1.18 ! bowersj2 339: # Handle writing out the vars to the file
! 340: my $file = Apache::File->new('>'.$self->{FILENAME});
! 341: print $file $self->_varsInFile();
! 342:
1.3 bowersj2 343: return $result;
1.1 bowersj2 344: }
345:
346: =pod
347:
348: =item B<name>([name]): Returns the name of the wizard. If a parameter is passed, that will be saved as the name.
349:
350: =cut
351:
352: # Returns/sets the name of this wizard, i.e., "Assignment Parameter"
353: sub title {
354: my $self = shift;
355: if (@_) { $self->{TITLE} = shift};
356: return $self->{TITLE};
357: }
358:
359: =pod
360:
361: =item B<getVars>(): Returns a hash reference containing the stored vars for this wizard. The states use this for variables maintained across states. Example: C<my %vars = %{$wizard-E<gt>getVars()};> This provides read-only access, apparently.
362:
363: =cut
364:
365: sub getVars {
366: my $self = shift;
367: return ($self->{VARS});
368: }
369:
370: =pod
371:
372: =item B<setVar>(key, val): Sets the var named "key" to "val" in the wizard's form array.
373:
374: =cut
375:
376: sub setVar {
377: my $self = shift;
378: my $key = shift;
379: my $val = shift;
1.18 ! bowersj2 380: $self->{VARS}->{$key} = $val;
1.1 bowersj2 381: }
382:
383: =pod
384:
1.4 bowersj2 385: =item B<queryStringVars>(): Returns a string representing the current state of the wizard, suitable for use directly as part of a query string. (See resource_state for an example.)
386:
387: =cut
388:
389: sub queryStringVars {
390: my $self = shift;
391:
1.18 ! bowersj2 392: my @storedVars = ('STATE', 'TOKEN', 'RETURN_PAGE');
1.4 bowersj2 393: my @queryString = ();
394:
1.18 ! bowersj2 395: push @queryString, 'TOKEN=' .
! 396: Apache::lonnet::escape($self->{TOKEN});
1.4 bowersj2 397: push @queryString, 'CURRENT_STATE=' . Apache::lonnet::escape($self->{STATE});
398: push @queryString, 'RETURN_PAGE=' . Apache::lonnet::escape($self->{RETURN_PAGE});
399:
400: return join '&', @queryString;
401: }
402:
403: =pod
404:
1.1 bowersj2 405: =item B<setDone>(): If a state calls this, the wizard will consider itself completed. The state should display a friendly "Done" message, and the wizard will display a link returning the user to the invoking page, rather then a "Next" button.
406:
407: =cut
408:
409: # A temp function for debugging
410: sub handler {
411: my $r = shift;
412:
413: Apache::loncommon::get_unprocessed_cgi($ENV{QUERY_STRING});
414:
1.3 bowersj2 415: if ($r->header_only) {
416: if ($ENV{'browser.mathml'}) {
417: $r->content_type('text/xml');
418: } else {
419: $r->content_type('text/html');
420: }
421: $r->send_http_header;
422: return OK;
423: }
424:
425: # Send header, don't cache this page
426: if ($ENV{'browser.mathml'}) {
427: $r->content_type('text/xml');
428: } else {
429: $r->content_type('text/html');
430: }
431: &Apache::loncommon::no_cache($r);
432: $r->send_http_header;
433: $r->rflush();
434:
435: my $mes = <<WIZBEGIN;
1.7 bowersj2 436: <p>This wizard will allow you to <b>set open, due, and answer dates for problems</b>. You will be asked to select a problem, what kind of date you want to set, and for whom the date should be effective.</p>
1.3 bowersj2 437:
1.7 bowersj2 438: <p>After the wizard is done, you will be shown where in the advanced interface you would have gone to change the parameter you have chosen, so in the future you can do it directly.</p>
1.1 bowersj2 439:
1.7 bowersj2 440: <p>Press <b>Next -></b> to begin, or select <b><- Previous</b> to go back to the previous screen.</p>
1.3 bowersj2 441: WIZBEGIN
1.1 bowersj2 442:
1.3 bowersj2 443: my $wizard = Apache::lonwizard->new("Course Parameter Wizard");
444: $wizard->declareVars(['ACTION_TYPE', 'GRANULARITY', 'TARGETS', 'PARM_DATE', 'RESOURCE_ID', 'USER_NAME', 'SECTION_NAME']);
1.7 bowersj2 445: my %dateTypeHash = ('open_date' => "opening date",
446: 'due_date' => "due date",
447: 'answer_date' => "answer date");
448: my %levelTypeHash = ('whole_course' => "all problems in the course",
449: 'map' => 'the selected folder',
450: 'resource' => 'the selected problem');
1.3 bowersj2 451:
1.7 bowersj2 452: Apache::lonwizard::message_state->new($wizard, "START", "Welcome to the Assignment Parameter Wizard", $mes, "CHOOSE_LEVEL");
453: Apache::lonwizard::switch_state->new($wizard, "CHOOSE_LEVEL", "Which Problem or Problems?", "GRANULARITY", [
454: ["whole_course", "<b>Every problem</b> in the course", "CHOOSE_ACTION"],
455: ["map", "Every problem in a particular <b>folder</b>", "CHOOSE_FOLDER"],
456: ["resource", "One particular <b>problem</b>", "CHOOSE_RESOURCE"]],
457: "Which problems do you wish to change a date for?");
1.15 bowersj2 458: Apache::lonwizard::resource_choice->new($wizard, "CHOOSE_FOLDER", "Select Folder", "Select the folder you wish to set the date for:", "CHOOSE_ACTION", "RESOURCE_ID", sub {my $res = shift; return $res->is_map();});
459: Apache::lonwizard::resource_choice->new($wizard, "CHOOSE_RESOURCE", "Select Resource", "", "CHOOSE_ACTION", "RESOURCE_ID", sub {my $res = shift; return $res->is_map() || $res->is_problem();}, sub {my $res = shift; return $res->is_problem(); });
1.7 bowersj2 460: my $levelType = $levelTypeHash{$wizard->{VARS}->{GRANULARITY}};
461: Apache::lonwizard::switch_state->new($wizard, "CHOOSE_ACTION", "Parameter Type", "ACTION_TYPE", [
462: ["open_date", "Set an <b>open date</b>", "CHOOSE_DATE"],
463: ["due_date", "Set a <b>due date</b>", "CHOOSE_DATE"],
464: ["answer_date", "Set an <b>answer open date</b>", "CHOOSE_DATE" ] ],
465: "What parameters do you want to set for $levelType?");
466: my $dateType = $dateTypeHash{$wizard->{VARS}->{ACTION_TYPE}};
467: Apache::lonwizard::date_state->new($wizard, "CHOOSE_DATE", "Set Date", "PARM_DATE", "CHOOSE_STUDENT_LEVEL", "What should the $dateType be set to?");
468: Apache::lonwizard::switch_state->new($wizard, "CHOOSE_STUDENT_LEVEL", "Students Affected", "TARGETS", [
469: ["course", ". . . for <b>all students</b> in the course", "FINISH"],
470: ["section", ". . . for a particular <b>section</b>", "CHOOSE_SECTION"],
471: ["student", ". . . for an individual <b>student</b>", "CHOOSE_STUDENT"]],
472: "Set $dateType of $levelType for. . .");
1.3 bowersj2 473:
1.15 bowersj2 474: Apache::lonwizard::choose_section->new($wizard, "CHOOSE_SECTION", "Select Section", "Please select the section you wish to set the $dateType for:", "FINISH", "SECTION_NAME");
475: Apache::lonwizard::choose_student->new($wizard, "CHOOSE_STUDENT", "Select Student", "Please select the student you wish to set the $dateType for:", "FINISH", "USER_NAME");
1.3 bowersj2 476: Apache::lonwizard::parmwizfinal->new($wizard, "FINISH", "Confirm Selection");
477:
1.1 bowersj2 478: $r->print($wizard->display());
479:
480: return OK;
481: }
482:
483:
484:
485: 1;
486:
487: =head1 Class: lonwizstate
488:
489: A "lonwizstate" object represents a lonwizard state. A "state" is basically what is visible on the screen. For instance, a state may display a radio button dialog with three buttons, and wait for the user to choose one.
490:
491: Several pre-prepared child classes are include in lonwizard. If you create a new wizard type, be sure to add it to lonwizard.pm so others can use it too.
492:
1.3 bowersj2 493: It is importent to remember when constructing states that the user may use the "Previous" button to go back and revisit a state previously filled out. Thus, states should consult the wizard variables they are intended to set to see if the user has already selected something, and when displaying themselves should reselect the same values, such that the user paging from the end to the beginning, back to the end, will not change any settings.
494:
495: None of the pre-packaged states correctly handle there being B<no> input, as the wizard does not currently have any protection against errors in the states themselves. (The closest thing you can do is set the wizard to be done and display an error message, which should be adequate.)
496:
1.7 bowersj2 497: By default, the wizard framework will take form elements of the form {VAR_NAME}.forminput and automatically insert the contents of that form element into the wizard variable {VAR_NAME}. You only need to use postprocess to do something fancy if that is not sufficient, for instance, processing a multi-element selection. (See resource choice for an example of that.)
498:
1.1 bowersj2 499: =head2 lonwizstate methods
500:
501: These methods should be overridden in derived states, except B<new> which may be sufficient.
502:
503: =over 2
504:
505: =item B<new> (parentLonWizReference, stateName, stateTitle): Creates a new state and returns it. The first argument is a reference to the parent wizard. The second is the name of the state, which I<must> be unique. The third is the title, which will be displayed on the screen to the human.
506:
507: =item B<preprocess>(): preprocess sets up all of the information the state needs to do its job, such as querying data bases to obtain lists of choices, and sets up data for the render method. If preprocess decides to jump to a new state, it is responsible for manually running post-process, if it so desires.
508:
509: =over 2
510:
511: =item If this method calls the parent lonwizard's B<changeState> method to another state, then the state will never be rendered on the screen, and the wizard will move to the specified state. This is useful if the state may only be necessary to clarify an ambiguous input, such as selecting a part from a multi-part problem, which isn't necessary if the problem only has one state.
512:
513: =back
514:
515: =item B<render>(): render returns a string of itself to be rendered to the screen, which the wizard will display.
516:
517: =cut
518:
519: package Apache::lonwizard::state;
520:
521: use strict;
522:
523: sub new {
524: my $proto = shift;
525: my $class = ref($proto) || $proto;
526: my $self = {};
527: $self->{WIZARD} = shift;
528: $self->{NAME} = shift;
529: $self->{TITLE} = shift;
530:
531: bless($self);
532:
533: $self->{WIZARD}->registerState($self);
534: return $self;
535: }
536:
537: sub name {
538: my $self = shift;
539: if (@_) { $self->{NAME} = shift};
540: return $self->{NAME};
541: }
542:
543: sub title {
544: my $self = shift;
545: if (@_) { $self->{TITLE} = shift};
546: return $self->{TITLE};
547: }
548:
549: sub preprocess {
550: return 1;
551: }
552:
1.11 bowersj2 553: =pod
554:
555: =item * B<process_multiple_choices>(formname, var_name): A service function that correctly handles resources with multiple selections, such as checkboxes. It delimits the selections with triple pipes and stores them in the given wizard variable. 'formname' is the name of the form element to process.
556:
557: =back
558:
559: =cut
560:
561: sub process_multiple_choices {
562: my $self = shift;
563: my $formname = shift;
564: my $var = shift;
565: my $wizard = $self->{WIZARD};
566:
1.14 bowersj2 567: my $formvalue = $ENV{'form.' . $formname};
1.11 bowersj2 568: if ($formvalue) {
569: # Must extract values from $wizard->{DATA} directly, as there
570: # may be more then one.
571: my @values;
572: for my $formparam (split (/&/, $wizard->{DATA})) {
573: my ($name, $value) = split(/=/, $formparam);
1.14 bowersj2 574: if ($name ne $formname) {
1.11 bowersj2 575: next;
576: }
577: $value =~ tr/+/ /;
578: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg;
579: push @values, $value;
580: }
581: $wizard->setVar($var, join('|||', @values));
582: }
583:
584: return;
585: }
586:
1.1 bowersj2 587: sub render {
588: return "This is the empty state. If you can see this, it's a bug.\n"
589: }
590:
591: sub postprocess {
592: return 1;
593: }
594:
1.3 bowersj2 595: # If this is 1, the wizard assumes the state will override the
596: # wizard's form, useful for some final states
597: sub overrideForm {
598: return 0;
599: }
600:
1.1 bowersj2 601: 1;
602:
603: =pod
604:
605: =back
606:
607: =head1 Prepackaged States
608:
609: lonwizard provides several pre-packaged states that you can drop into your Wizard and obtain common functionality.
610:
611: =head2 Class: message_state
612:
613: message_state is a state the simply displays a message. It does not do any pre- or postprocessing. It makes a good initial state, which traditionally is a short message telling the user what they are about to accomplish, and may contain warnings or preconditions that should be fulfilled before using the wizard.
614:
615: =over 4
616:
1.3 bowersj2 617: =item overridden method B<new>(parentLonWizReference, stateName, stateTitle, message, nextState): Two new parameters "message" will be the HTML message displayed to the user, and "nextState" is the name of the next state.
1.1 bowersj2 618:
619: =back
620:
621: =cut
622:
623: package Apache::lonwizard::message_state;
624:
625: no strict;
626: @ISA = ("Apache::lonwizard::state");
627: use strict;
628:
629: sub new {
630: my $proto = shift;
631: my $class = ref($proto) || $proto;
632:
1.3 bowersj2 633: # This cute looking statement correctly handles subclassing
1.1 bowersj2 634: my $self = bless $proto->SUPER::new(shift, shift, shift);
635:
636: $self->{MESSAGE} = shift;
637: $self->{NEXT_STATE} = shift;
638:
639: return $self;
640: }
641:
642: sub postprocess {
643: my $self = shift;
644: $self->{WIZARD}->changeState($self->{NEXT_STATE});
645: return 1;
646: }
647:
648: sub render {
649: my $self = shift;
650: return $self->{MESSAGE};
651: }
652:
653: 1;
654:
655: package Apache::lonwizard::choice_state;
656:
657: no strict;
658: @ISA = ("Apache::lonwizard::state");
659: use strict;
660:
661: =pod
662:
663: =head2 Class: choice_state
664:
665: Choice state provides a single choice to the user as a text selection box. You pass it a message and hash containing [human_name] -> [computer_name] entries, and it will display the choices and store the result in the provided variable.
666:
667: If there is only one choice, the state will automatically make it and go to the next state.
668:
669: =over 4
670:
1.15 bowersj2 671: =item overridden method B<new>(parentLonWizReference, stateName, stateTitle, messageBefore, nextState, varName, choiceHash, multichoice): messageBefore is the HTML text that will be displayed before the choice display. Keys will be sorted according to human name. nextState is the state to proceed to after the choice. varName is the name of the wizard var to store the computer_name answer in. choiceHash is the hash described above. It is optional because you may override it. multichoice is true if the user can make multiple choices, false otherwise. (Multiple choices will be seperated with ||| in the wizard variable.
1.1 bowersj2 672:
1.3 bowersj2 673: =back
674:
1.1 bowersj2 675: =cut
676:
1.3 bowersj2 677: sub new {
678: my $proto = shift;
679: my $class = ref($proto) || $proto;
680: my $self = bless $proto->SUPER::new(shift, shift, shift);
681:
682: $self->{MESSAGE_BEFORE} = shift;
683: $self->{NEXT_STATE} = shift;
684: $self->{VAR_NAME} = shift;
685: $self->{CHOICE_HASH} = shift;
1.13 bowersj2 686: $self->{MULTICHOICE} = shift;
1.3 bowersj2 687: $self->{NO_CHOICES} = 0;
688:
689: return $self;
690: }
691:
1.1 bowersj2 692: sub preprocess {
693: my $self = shift;
1.3 bowersj2 694: my $choices = $self->{CHOICE_HASH};
695: if (!defined($self->{CHOICE_HASH})) {
696: $choices = $self->{CHOICE_HASH} = $self->determineChoices();
697: }
698: my $wizvars = $self->{WIZARD}->getVars();
1.1 bowersj2 699:
1.3 bowersj2 700: my @keys = keys(%$choices);
1.1 bowersj2 701: @keys = sort @keys;
702:
703: if (scalar(@keys) == 0)
704: {
705: # No choices... so prepare to display error message and cancel further execution.
706: $self->{NO_CHOICES} = 1;
1.3 bowersj2 707: $self->{WIZARD}->{DONE} = 1;
1.1 bowersj2 708: return;
709: }
710: if (scalar(@keys) == 1)
711: {
712: # If there is only one choice, pick it and move on.
1.3 bowersj2 713: $wizvars->{$self->{VAR_NAME}} = $choices->{$keys[0]};
1.1 bowersj2 714: $self->{WIZARD}->changeState($self->{NEXT_STATE});
715: return;
716: }
717:
718: # Otherwise, do normal processing in the render routine.
719:
720: return;
721: }
722:
723: sub determineChoices {
1.15 bowersj2 724: # Return no choices, which will terminate the wizard
725: return {};
1.1 bowersj2 726: }
727:
728: sub render {
729: my $self = shift;
730: my $result = "";
731: my $var = $self->{VAR_NAME};
1.13 bowersj2 732: my $buttons = '';
1.1 bowersj2 733:
1.13 bowersj2 734: if ($self->{MULTICHOICE}) {
735: $result = <<SCRIPT;
736: <script>
737: function checkall(value) {
738: for (i=0; i<document.forms.wizform.elements.length; i++) {
739: document.forms.wizform.elements[i].checked=value;
740: }
741: }
742: </script>
743: SCRIPT
744: $buttons = <<BUTTONS;
745: <input type="button" onclick="checkall(true)" value="Select All" />
746: <input type="button" onclick="checkall(false)" value="Unselect All" />
747: <br />
748: BUTTONS
749: }
750:
1.3 bowersj2 751: if (defined $self->{ERROR_MSG}) {
752: $result .= '<font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br /><br />';
753: }
754:
1.10 bowersj2 755: if (defined $self->{MESSAGE_BEFORE}) {
1.3 bowersj2 756: $result .= $self->{MESSAGE_BEFORE} . '<br /><br />';
1.1 bowersj2 757: }
758:
1.13 bowersj2 759: $result .= $buttons;
760:
1.3 bowersj2 761: my $choices = $self->{CHOICE_HASH};
762: my @keys = keys (%$choices);
763:
1.13 bowersj2 764: my $type = "radio";
765: if ($self->{MULTICHOICE}) { $type = 'checkbox'; }
1.14 bowersj2 766: foreach (@keys) {
1.13 bowersj2 767:
768: $result .= "<input type='$type' name='" .
769: $self->{VAR_NAME} . '.forminput' .
770: "' value=\"" .
771: HTML::Entities::encode($choices->{$_})
772: . "\"/> " . HTML::Entities::encode($_) . "<br />\n";
1.3 bowersj2 773: }
1.1 bowersj2 774:
1.3 bowersj2 775: return $result;
776: }
777:
778: sub postprocess {
779: my $self = shift;
780: my $wizard = $self->{WIZARD};
781: my $formvalue = $ENV{'form.' . $self->{VAR_NAME} . '.forminput'};
782: if ($formvalue) {
1.14 bowersj2 783: if ($self->{MULTICHOICE}) {
784: $self->process_multiple_choices($self->{VAR_NAME}.'.forminput',
785: $self->{VAR_NAME});
786: }
787: # For non-multichoice, value already stored by Wizard
1.3 bowersj2 788: $wizard->changeState($self->{NEXT_STATE});
789: } else {
790: $self->{ERROR_MSG} = "Can't continue the wizard because you must make"
791: . ' a selection to continue.';
792: }
793: return 1;
794: }
795:
796: package Apache::lonwizard::switch_state;
797:
798: no strict;
799: @ISA = ("Apache::lonwizard::state");
800: use strict;
801:
802: =pod
1.1 bowersj2 803:
1.3 bowersj2 804: =head2 Class; switch_state
805:
806: Switch state provides the ability to present the user with several radio-button choices. The state can store the user response in a wizard variable, and can also send the user to a different state for each selection, which is the intended primary purpose.
807:
808: Each choice may have arbitrary HTML associated with it, which will be used as the label. The first choice will be selected by default.
809:
810: =over 4
811:
1.15 bowersj2 812: =item overridden method B<new>(parentLonWizReference, stateName, stateTitle, varName, choiceList, messageBefore): varName is the name of the wizard variable the state will set with the choice made. choiceHash is list reference of a list of list references to three element lists, where the first element is what the wizard var varName will be set to, the second is the HTML that will be displayed for that choice, and the third is the destination state. The special setting 'ILLEGAL' can be used in the first place to state that it is not a legal chocie (see lonprintout.pm for real-life usage of that). messageBefore is an optional HTML string that will be placed before the message.
1.3 bowersj2 813:
1.13 bowersj2 814: Note that ILLEGAL is desirable because some choices may not always be good choices, but they should not necessarily disappear with no explanantion of why they are no good. In lonprintout.pm, for instance, the choice "Problems from current sequence" may be no good because there are no problems in the sequence, but it should not silently disappear; it should announce that there are no problems in the sequence.
815:
816: An example of a legit choiceList: C<my $choicelist = [ ["flunk", "Flunk Student", "FLUNK_STATE"], ["pass", "Pass Student", "PASS_STATE"] ];>
1.3 bowersj2 817:
818: =back
819:
820: =cut
821:
822: sub new {
823: my $proto = shift;
824: my $class = ref($proto) || $proto;
825: my $self = bless $proto->SUPER::new(shift, shift, shift);
826:
827: $self->{VAR_NAME} = shift;
828: $self->{CHOICE_LIST} = shift;
829: $self->{MESSAGE_BEFORE} = shift;
830:
831: return $self;
832: }
833:
834: # Don't need a preprocess step; we assume we know the choices
835:
836: sub render {
837: my $self = shift;
838: my $result = "";
839: my $var = $self->{VAR_NAME};
840: my @choices = @{$self->{CHOICE_LIST}};
841: my $curVal = $self->{WIZARD}->{VARS}->{$var};
842:
843: $result .= $self->{MESSAGE_BEFORE} if (defined $self->{MESSAGE_BEFORE});
844:
845: $result .= "<table>\n\n";
846:
1.15 bowersj2 847: my $checked = 0;
848: foreach my $choice (@choices) {
1.3 bowersj2 849: my $value = $choice->[0];
850: my $text = $choice->[1];
851:
852: $result .= "<tr>\n<td width='20'> </td>\n<td>";
853: $result .= "<td valign=\"top\"><input type=\"radio\" name=\"$var.forminput\"";
1.15 bowersj2 854: if (!$checked) {
1.17 bowersj2 855: $result .= " checked";
1.15 bowersj2 856: $checked = 1;
857: }
1.3 bowersj2 858: $result .= " value=\"$value\"></td>\n<td>$text</td>\n</tr>\n\n";
859: }
860:
861: $result .= "<table>\n\n";
862:
863: return $result;
864: }
865:
866: sub postprocess {
1.7 bowersj2 867: # Value already stored by wizard
1.3 bowersj2 868: my $self = shift;
869: my $wizard = $self->{WIZARD};
870: my $chosenValue = $ENV{"form." . $self->{VAR_NAME} . '.forminput'};
871:
1.15 bowersj2 872: foreach my $choice (@{$self->{CHOICE_LIST}}) {
873: if ($choice->[0] eq $chosenValue) {
1.3 bowersj2 874: $wizard->changeState($choice->[2]);
875: }
876: }
877: }
878:
879: # If there is only one choice, make it and move on
880: sub preprocess {
881: my $self = shift;
882: my $choiceList = $self->{CHOICE_LIST};
883: my $wizard = $self->{WIZARD};
884:
1.15 bowersj2 885: if (scalar(@{$choiceList}) == 1) {
1.3 bowersj2 886: my $choice = $choiceList->[0];
887: my $chosenVal = $choice->[0];
888: my $nextState = $choice->[2];
889:
890: $wizard->setVar($self->{VAR_NAME}, $chosenVal)
891: if (defined ($self->{VAR_NAME}));
892: $wizard->changeState($nextState);
893: }
894: }
895:
896: 1;
897:
898: package Apache::lonwizard::date_state;
899:
900: use Time::localtime;
901: use Time::Local;
902: use Time::tm;
903:
904: no strict;
905: @ISA = ("Apache::lonwizard::state");
906: use strict;
907:
908: my @months = ("January", "February", "March", "April", "May", "June", "July",
909: "August", "September", "October", "November", "December");
910:
911: =pod
912:
913: =head2 Class: date_state
914:
915: Date state provides a state for selecting a date/time, as seen in the course parmset wizard.. You can choose to display date entry if that's what you need.
916:
917: =over 4
918:
1.15 bowersj2 919: =item overriddent method B<new>(parentLonWizReference, stateName, stateTitle, varName, nextState, messageBefore, displayJustDate): varName is where the date/time will be stored as seconds since the epoch. messageBefore and messageAfter as other states. displayJustDate is a flag defaulting to false that if true, will only display the date selection (defaulting to midnight on that date). Otherwise, minutes and hours will be shown.
1.3 bowersj2 920:
921: =back
922:
923: =cut
924:
925: sub new {
926: my $proto = shift;
927: my $class = ref($proto) || $proto;
928: my $self = bless $proto->SUPER::new(shift, shift, shift);
929:
930: $self->{VAR_NAME} = shift;
931: $self->{NEXT_STATE} = shift;
932: $self->{MESSAGE_BEFORE} = shift;
933: $self->{DISPLAY_JUST_DATE} = shift;
934: if (!defined($self->{DISPLAY_JUST_DATE})) {$self->{DISPLAY_JUST_DATE} = 0;}
935: return $self;
936: }
937:
938: sub render {
939: my $self = shift;
940: my $result = "";
941: my $var = $self->{VAR_NAME};
942: my $name = $self->{NAME};
943: my $wizvars = $self->{WIZARD}->getVars();
944:
945: my $date;
946:
1.15 bowersj2 947: # Default date: Now
948: $date = localtime($wizvars->{$var});
1.3 bowersj2 949:
950: if (defined $self->{ERROR_MSG}) {
951: $result .= '<font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br /><br />';
952: }
953:
954: if (defined ($self->{MESSAGE_BEFORE})) {
955: $result .= $self->{MESSAGE_BEFORE};
956: $result .= "<br /><br />\n\n";
957: }
958:
959: # Month
960: my $i;
961: $result .= "<select name='$self->{VAR_NAME}month'>\n";
962: for ($i = 0; $i < 12; $i++) {
963: if ($i == $date->mon) {
964: $result .= "<option value='$i' selected>";
965: } else {
966: $result .= "<option value='$i'>";
967: }
1.8 bowersj2 968: $result .= $months[$i] . "</option>\n";
1.3 bowersj2 969: }
970: $result .= "</select>\n";
971:
972: # Day
973: $result .= "<select name='$self->{VAR_NAME}day'>\n";
974: for ($i = 1; $i < 32; $i++) {
975: if ($i == $date->mday) {
976: $result .= '<option selected>';
977: } else {
978: $result .= '<option>';
979: }
1.8 bowersj2 980: $result .= "$i</option>\n";
1.3 bowersj2 981: }
982: $result .= "</select>,\n";
983:
984: # Year
985: $result .= "<select name='$self->{VAR_NAME}year'>\n";
986: for ($i = 2000; $i < 2030; $i++) { # update this after 64-bit dates
987: if ($date->year + 1900 == $i) {
988: $result .= "<option selected>";
989: } else {
990: $result .= "<option>";
991: }
1.8 bowersj2 992: $result .= "$i</option>\n";
1.3 bowersj2 993: }
994: $result .= "</select>,\n";
995:
996: # Display Hours and Minutes if they are called for
997: if (!$self->{DISPLAY_JUST_DATE}) {
1.8 bowersj2 998: # Build hour
1.3 bowersj2 999: $result .= "<select name='$self->{VAR_NAME}hour'>\n";
1.8 bowersj2 1000: $result .= "<option " . ($date->hour == 0 ? 'selected ':'') .
1001: " value='0'>midnight</option>\n";
1.3 bowersj2 1002: for ($i = 1; $i < 12; $i++) {
1.8 bowersj2 1003: if ($date->hour == $i) {
1004: $result .= "<option selected value='$i'>$i a.m.</option>\n";
1005: } else {
1006: $result .= "<option value='$i'>$i a.m</option>\n";
1007: }
1008: }
1009: $result .= "<option " . ($date->hour == 12 ? 'selected ':'') .
1010: " value='12'>noon</option>\n";
1011: for ($i = 13; $i < 24; $i++) {
1012: my $printedHour = $i - 12;
1013: if ($date->hour == $i) {
1014: $result .= "<option selected value='$i'>$printedHour p.m.</option>\n";
1.3 bowersj2 1015: } else {
1.8 bowersj2 1016: $result .= "<option value='$i'>$printedHour p.m.</option>\n";
1.3 bowersj2 1017: }
1018: }
1.8 bowersj2 1019:
1.3 bowersj2 1020: $result .= "</select> :\n";
1021:
1022: $result .= "<select name='$self->{VAR_NAME}minute'>\n";
1023: for ($i = 0; $i < 60; $i++) {
1.8 bowersj2 1024: my $printedMinute = $i;
1025: if ($i < 10) {
1026: $printedMinute = "0" . $printedMinute;
1027: }
1.3 bowersj2 1028: if ($date->min == $i) {
1029: $result .= "<option selected>";
1030: } else {
1031: $result .= "<option>";
1032: }
1.8 bowersj2 1033: $result .= "$printedMinute</option>\n";
1.3 bowersj2 1034: }
1035: $result .= "</select>\n";
1036: }
1037:
1038: if (defined ($self->{MESSAGE_AFTER})) {
1039: $result .= "<br /><br />" . $self->{MESSAGE_AFTER};
1.1 bowersj2 1040: }
1041:
1042: return $result;
1043: }
1044:
1.3 bowersj2 1045: # Stick the date stored into the chosen variable.
1.1 bowersj2 1046: sub postprocess {
1047: my $self = shift;
1048: my $wizard = $self->{WIZARD};
1.3 bowersj2 1049:
1050: my $month = $ENV{'form.' . $self->{VAR_NAME} . 'month'};
1051: my $day = $ENV{'form.' . $self->{VAR_NAME} . 'day'};
1052: my $year = $ENV{'form.' . $self->{VAR_NAME} . 'year'};
1053: my $min = 0;
1054: my $hour = 0;
1055: if (!$self->{DISPLAY_JUST_DATE}) {
1056: $min = $ENV{'form.' . $self->{VAR_NAME} . 'minute'};
1057: $hour = $ENV{'form.' . $self->{VAR_NAME} . 'hour'};
1058: }
1059:
1060: my $chosenDate = Time::Local::timelocal(0, $min, $hour, $day, $month, $year);
1061: # Check to make sure that the date was not automatically co-erced into a
1062: # valid date, as we want to flag that as an error
1063: # This happens for "Feb. 31", for instance, which is coerced to March 2 or
1064: # 3, depending on if it's a leapyear
1065: my $checkDate = localtime($chosenDate);
1066:
1067: if ($checkDate->mon != $month || $checkDate->mday != $day ||
1068: $checkDate->year + 1900 != $year) {
1069: $self->{ERROR_MSG} = "Can't use " . $months[$month] . " $day, $year as a "
1070: . "date because it doesn't exist. Please enter a valid date.";
1071: return;
1072: }
1073:
1074: $wizard->setVar($self->{VAR_NAME}, $chosenDate);
1075:
1.1 bowersj2 1076: $wizard->changeState($self->{NEXT_STATE});
1.3 bowersj2 1077: }
1078:
1079: 1;
1080:
1081: package Apache::lonwizard::parmwizfinal;
1082:
1083: # This is the final state for the parmwizard. It is not generally useful,
1.15 bowersj2 1084: # so it is not perldoc'ed. It does its own processing.
1.3 bowersj2 1085:
1086: no strict;
1087: @ISA = ('Apache::lonwizard::state');
1088: use strict;
1089:
1090: use Time::localtime;
1091:
1092: sub new {
1093: my $proto = shift;
1094: my $class = ref($proto) || $proto;
1095: my $self = bless $proto->SUPER::new(shift, shift, shift);
1096:
1097: # No other variables because it gets it all from the wizard.
1098: }
1099:
1100: # Renders a form that, when submitted, will form the input to lonparmset.pm
1101: sub render {
1102: my $self = shift;
1103: my $wizard = $self->{WIZARD};
1104: my $wizvars = $wizard->{VARS};
1105:
1106: # FIXME: Unify my designators with the standard ones
1107: my %dateTypeHash = ('open_date' => "Opening Date",
1108: 'due_date' => "Due Date",
1109: 'answer_date' => "Answer Date");
1110: my %parmTypeHash = ('open_date' => "0_opendate",
1111: 'due_date' => "0_duedate",
1112: 'answer_date' => "0_answerdate");
1113:
1.10 bowersj2 1114: my $result = "<form name='wizform' method='get' action='/adm/parmset'>\n";
1.3 bowersj2 1115: $result .= '<p>Confirm that this information is correct, then click "Finish Wizard" to complete setting the parameter.<ul>';
1116: my $affectedResourceId = "";
1117: my $parm_name = $parmTypeHash{$wizvars->{ACTION_TYPE}};
1118: my $level = "";
1119:
1120: # Print the type of manipulation:
1121: $result .= '<li>Setting the <b>' . $dateTypeHash{$wizvars->{ACTION_TYPE}}
1122: . "</b></li>\n";
1123: if ($wizvars->{ACTION_TYPE} eq 'due_date' ||
1124: $wizvars->{ACTION_TYPE} eq 'answer_date') {
1125: # for due dates, we default to "date end" type entries
1126: $result .= "<input type='hidden' name='recent_date_end' " .
1127: "value='" . $wizvars->{PARM_DATE} . "' />\n";
1128: $result .= "<input type='hidden' name='pres_value' " .
1129: "value='" . $wizvars->{PARM_DATE} . "' />\n";
1130: $result .= "<input type='hidden' name='pres_type' " .
1131: "value='date_end' />\n";
1132: } elsif ($wizvars->{ACTION_TYPE} eq 'open_date') {
1133: $result .= "<input type='hidden' name='recent_date_start' ".
1134: "value='" . $wizvars->{PARM_DATE} . "' />\n";
1135: $result .= "<input type='hidden' name='pres_value' " .
1136: "value='" . $wizvars->{PARM_DATE} . "' />\n";
1137: $result .= "<input type='hidden' name='pres_type' " .
1138: "value='date_start' />\n";
1139: }
1140:
1141: # Print the granularity, depending on the action
1142: if ($wizvars->{GRANULARITY} eq 'whole_course') {
1143: $result .= '<li>for <b>all resources in the course</b></li>';
1144: $level = 9; # general course, see lonparmset.pm perldoc
1145: $affectedResourceId = "0.0";
1146: } elsif ($wizvars->{GRANULARITY} eq 'map') {
1147: my $navmap = Apache::lonnavmaps::navmap->new(
1148: $ENV{"request.course.fn"}.".db",
1149: $ENV{"request.course.fn"}."_parms.db", 0, 0);
1150: my $res = $navmap->getById($wizvars->{RESOURCE_ID});
1151: my $title = $res->compTitle();
1152: $navmap->untieHashes();
1153: $result .= "<li>for the map named <b>$title</b></li>";
1154: $level = 8;
1155: $affectedResourceId = $wizvars->{RESOURCE_ID};
1156: } else {
1157: my $navmap = Apache::lonnavmaps::navmap->new(
1158: $ENV{"request.course.fn"}.".db",
1159: $ENV{"request.course.fn"}."_parms.db", 0, 0);
1160: my $res = $navmap->getById($wizvars->{RESOURCE_ID});
1161: my $title = $res->compTitle();
1162: $navmap->untieHashes();
1163: $result .= "<li>for the resource named <b>$title</b></li>";
1164: $level = 7;
1165: $affectedResourceId = $wizvars->{RESOURCE_ID};
1166: }
1167:
1168: # Print targets
1169: if ($wizvars->{TARGETS} eq 'course') {
1170: $result .= '<li>for <b>all students in course</b></li>';
1171: } elsif ($wizvars->{TARGETS} eq 'section') {
1172: my $section = $wizvars->{SECTION_NAME};
1173: $result .= "<li>for section <b>$section</b></li>";
1174: $level -= 3;
1175: $result .= "<input type='hidden' name='csec' value='" .
1176: HTML::Entities::encode($section) . "' />\n";
1177: } else {
1178: # FIXME: This is probably wasteful!
1179: my $classlist = Apache::loncoursedata::get_classlist();
1180: my $name = $classlist->{$wizvars->{USER_NAME}}->[6];
1181: $result .= "<li>for <b>$name</b></li>";
1182: $level -= 6;
1183: my ($uname, $udom) = split /:/, $wizvars->{USER_NAME};
1184: $result .= "<input type='hidden' name='uname' value='".
1185: HTML::Entities::encode($uname) . "' />\n";
1186: $result .= "<input type='hidden' name='udom' value='".
1187: HTML::Entities::encode($udom) . "' />\n";
1188: }
1189:
1190: # Print value
1191: $result .= "<li>to <b>" . ctime($wizvars->{PARM_DATE}) . "</b> (" .
1192: Apache::lonnavmaps::timeToHumanString($wizvars->{PARM_DATE})
1193: . ")</li>\n";
1194:
1195: # print pres_marker
1196: $result .= "\n<input type='hidden' name='pres_marker'" .
1197: " value='$affectedResourceId&$parm_name&$level' />\n";
1198:
1199: $result .= "<br /><br /><center><input type='submit' value='Finish Wizard' /></center></form>\n";
1200:
1201: return $result;
1202: }
1203:
1204: sub overrideForm {
1.1 bowersj2 1205: return 1;
1206: }
1207:
1.3 bowersj2 1208: 1;
1209:
1210: package Apache::lonwizard::resource_choice;
1211:
1212: =pod
1213:
1214: =head2 Class: resource_choice
1215:
1.10 bowersj2 1216: resource_choice gives the user an opportunity to select one resource from the current course, and will stick the ID of that choice (#.#) into the desired variable.
1.3 bowersj2 1217:
1218: Note this state will not automatically advance if there is only one choice, because it might confuse the user in this case.
1219:
1220: =over 4
1221:
1.15 bowersj2 1222: =item overridden method B<new>(parentLonWizReference, stateName, stateTitle, messageBefore, nextState, varName, filterFunction, choiceFunction): messageBefore and messageAfter appear before and after the state choice, respectively. nextState is the state to proceed to after the choice. varName is the wizard variable to store the choice in.
1.3 bowersj2 1223:
1224: filterFunction is a function reference that receives the current resource as an argument, and returns 1 if it should be displayed, and 0 if it should not be displayed. By default, the class will use sub {return 1;}, which will show all resources. choiceFunction is a reference to a function that receives the resource object as a parameter and returns 1 if it should be a *selectable choice*, and 0 if not. By default, this is the same as the filterFunction, which means all displayed choices will be choosable. See parm wizard for an example of this in the resource selection routines.
1225:
1226: =back
1227:
1228: =cut
1.1 bowersj2 1229:
1230: no strict;
1231: @ISA = ("Apache::lonwizard::state");
1232: use strict;
1.3 bowersj2 1233:
1234: sub new {
1235: my $proto = shift;
1236: my $class = ref($proto) || $proto;
1237: my $self = bless $proto->SUPER::new(shift, shift, shift);
1238:
1239: $self->{MESSAGE_BEFORE} = shift;
1240: $self->{NEXT_STATE} = shift;
1241: $self->{VAR_NAME} = shift;
1242: $self->{FILTER_FUNC} = shift;
1243: if (!defined($self->{FILTER_FUNC})) {
1244: $self->{FILTER_FUNC} = sub {return 1;};
1245: }
1246: $self->{CHOICE_FUNC} = shift;
1247: if (!defined($self->{CHOICE_FUNC})) {
1248: $self->{CHOICE_FUNC} = $self->{FILTER_FUNC};
1249: }
1250: }
1251:
1252: sub postprocess {
1253: my $self = shift;
1254: my $wizard = $self->{WIZARD};
1.4 bowersj2 1255:
1256: # If we were just manipulating a folder, do not proceed to the
1257: # next state
1258: if ($ENV{'form.folderManip'}) {
1259: return;
1260: }
1261:
1.7 bowersj2 1262: if (!$ENV{'form.' . $self->{VAR_NAME} . '.forminput'}) {
1263: $self->{ERROR_MSG} = "Can't continue wizard because you must ".
1264: "select a resource.";
1265: return;
1266: }
1267:
1268:
1269: # Value stored by wizard framework
1270:
1.3 bowersj2 1271: $wizard->changeState($self->{NEXT_STATE});
1272: }
1273:
1.10 bowersj2 1274: # A note, in case I don't get to this before I leave.
1275: # If someone complains about the "Back" button returning them
1276: # to the previous folder state, instead of returning them to
1277: # the previous wizard state, the *correct* answer is for the wizard
1278: # to keep track of how many times the user has manipulated the folders,
1279: # and feed that to the history.go() call in the wizard rendering routines.
1280: # If done correctly, the wizard itself can keep track of how many times
1281: # it renders the same states, so it doesn't go in just this state, and
1282: # you can lean on the browser back button to make sure it all chains
1283: # correctly.
1.13 bowersj2 1284: # Either that, or force all folders open and don't allow the user
1285: # to close them.
1.10 bowersj2 1286:
1.3 bowersj2 1287: sub render {
1288: my $self = shift;
1.4 bowersj2 1289: my $wizard = $self->{WIZARD};
1.3 bowersj2 1290: my $result = "";
1291: my $var = $self->{VAR_NAME};
1292: my $curVal = $self->{WIZARD}->{VARS}->{$var};
1.4 bowersj2 1293: my $vals = {};
1294: if ($curVal =~ /,/) { # multiple choices
1295: foreach (split /,/, $curVal) {
1296: $vals->{$_} = 1;
1297: }
1298: } else {
1299: $vals->{$curVal} = 1;
1.7 bowersj2 1300: }
1301:
1302: if (defined $self->{ERROR_MSG}) {
1303: $result .= '<font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br /><br />';
1.4 bowersj2 1304: }
1.3 bowersj2 1305:
1.8 bowersj2 1306: $result .= $self->{MESSAGE_BEFORE} . '<br /><br />'
1307: if (defined $self->{MESSAGE_BEFORE});
1.3 bowersj2 1308:
1309: my $filterFunc = $self->{FILTER_FUNC};
1310: my $choiceFunc = $self->{CHOICE_FUNC};
1311:
1.4 bowersj2 1312: # Create the composite function that renders the column on the nav map
1.15 bowersj2 1313: # have to admit any language that lets me do this can't be all bad
1314: # - Jeremy (Pythonista) ;-)
1.17 bowersj2 1315: my $checked = 0;
1.4 bowersj2 1316: my $renderColFunc = sub {
1317: my ($resource, $part, $params) = @_;
1318:
1319: if (!&$choiceFunc($resource)) {
1320: return '<td> </td>';
1321: } else {
1322: my $col = "<td><input type='radio' name='${var}.forminput' ";
1.17 bowersj2 1323: if (!$checked) {
1.4 bowersj2 1324: $col .= "checked ";
1.17 bowersj2 1325: $checked = 1;
1.3 bowersj2 1326: }
1.18 ! bowersj2 1327: $col .= "value='" . $resource->symb() . "' /></td>";
1.4 bowersj2 1328: return $col;
1.3 bowersj2 1329: }
1.4 bowersj2 1330: };
1.3 bowersj2 1331:
1.4 bowersj2 1332: $result .=
1.8 bowersj2 1333: &Apache::lonnavmaps::render( { 'cols' => [$renderColFunc,
1.4 bowersj2 1334: Apache::lonnavmaps::resource()],
1335: 'showParts' => 0,
1336: 'queryString' => $wizard->queryStringVars() . '&folderManip=1',
1.12 bowersj2 1337: 'url' => $wizard->{URL},
1.8 bowersj2 1338: 'filterFunc' => $filterFunc } );
1.4 bowersj2 1339:
1.3 bowersj2 1340: return $result;
1341: }
1342:
1343: 1;
1344:
1.10 bowersj2 1345: package Apache::lonwizard::resource_multichoice;
1346:
1347: =pod
1348:
1349: =head2 Class: resource_multichoice
1350:
1351: resource_multichoice gives the user an opportunity to select multiple resources from some map in the current course, and will stick a list of the IDs of those choices in its variable.
1352:
1353: Note this state will not automatically advance if there is only one choice, because it might confuse the user. Also, the state will not advance until at least I<one> choice is taken, because it is generally nonsense to select nothing when this state is used.
1354:
1355: This is generally intended for use on a specific sequence, not the entire course, as for technical reasons the user can't open and close folders, so they must all be shown as open. To fix this would require making the folders image form submitters and remembering the selected state of each resource, which is not impossible but is too much error-prone work to do until it seems many people will want that feature.
1356:
1.13 bowersj2 1357: Note this class is generally useful for multi-choice selections, by overridding "determineChoices" to return the choice hash.
1358:
1.10 bowersj2 1359: =over 4
1360:
1.15 bowersj2 1361: =item overridden method B<new>(parentLonWizReference, stateName, stateTitle, messageBefore, nextState, varName, filterFunction, choiceFunction, map): Arguments like resource_choice. map is the ID number of a specific map that, if given is all that will be shown to the user, instead of the whole course.
1.10 bowersj2 1362:
1363: =back
1364:
1365: =cut
1366:
1367: no strict;
1368: @ISA = ("Apache::lonwizard::state");
1369: use strict;
1370:
1371: sub new {
1372: my $proto = shift;
1373: my $class = ref($proto) || $proto;
1374: my $self = bless $proto->SUPER::new(shift, shift, shift);
1375:
1376: $self->{MESSAGE_BEFORE} = shift;
1377: $self->{NEXT_STATE} = shift;
1378: $self->{VAR_NAME} = shift;
1379: $self->{FILTER_FUNC} = shift;
1380: if (!defined($self->{FILTER_FUNC})) {
1381: $self->{FILTER_FUNC} = sub {return 1;};
1382: }
1383: $self->{CHOICE_FUNC} = shift;
1384: if (!defined($self->{CHOICE_FUNC})) {
1385: $self->{CHOICE_FUNC} = $self->{FILTER_FUNC};
1386: }
1387: $self->{MAP} = shift;
1388: if (!defined($self->{MAP})) {
1389: $self->{MAP} = 1; # 0? trying to default to entire course
1390: }
1391: }
1392:
1393: sub postprocess {
1394: my $self = shift;
1395: my $wizard = $self->{WIZARD};
1396:
1.11 bowersj2 1397: $self->process_multiple_choices($self->{VAR_NAME}.'.forminput',
1398: $self->{VAR_NAME});
1.10 bowersj2 1399:
1400: # If nothing was selected...
1401: if (!$wizard->{VARS}->{$self->{VAR_NAME}}) {
1402: $self->{ERROR_MSG} = "You must select one or more resources to continue.";
1403: return;
1404: }
1405:
1406: $wizard->changeState($self->{NEXT_STATE});
1407: }
1408:
1409: sub render {
1410: my $self = shift;
1411: my $wizard = $self->{WIZARD};
1412: my $var = $self->{VAR_NAME};
1413: my $result = <<SCRIPT;
1414: <script>
1415: function checkall(value) {
1416: for (i=0; i<document.forms.wizform.elements.length; i++) {
1417: document.forms.wizform.elements[i].checked=value;
1418: }
1419: }
1420: </script>
1421: SCRIPT
1422:
1423: my $buttons = <<BUTTONS;
1424: <input type="button" onclick="checkall(true)" value="Select All" />
1425: <input type="button" onclick="checkall(false)" value="Unselect All" />
1426: <br />
1427: BUTTONS
1428:
1429: if (defined $self->{ERROR_MSG}) {
1430: $result .= '<font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br /><br />';
1431: }
1432:
1433: $result .= $self->{MESSAGE_BEFORE} . '<br /><br />'
1434: if (defined $self->{MESSAGE_BEFORE});
1435:
1436: my $filterFunc = $self->{FILTER_FUNC};
1437: my $choiceFunc = $self->{CHOICE_FUNC};
1438:
1439: # Create the composite function that renders the column on the nav map
1440: my $renderColFunc = sub {
1441: my ($resource, $part, $params) = @_;
1442:
1443: if (!&$choiceFunc($resource)) {
1444: return '<td> </td>';
1445: } else {
1446: my $col = "<td><input type='checkbox' name='${var}.forminput'".
1447: " value='" . $resource->{ID} . "' /></td>";
1448: return $col;
1449: }
1450: };
1451:
1452: $result .= $buttons;
1453:
1454: $result .=
1455: &Apache::lonnavmaps::render( { 'cols' => [$renderColFunc,
1456: Apache::lonnavmaps::resource()],
1457: 'showParts' => 0,
1458: 'filterFunc' => $filterFunc,
1459: 'iterator_map' => $self->{MAP},
1460: 'resource_no_folder_link' => 1 } );
1461:
1462: $result .= $buttons;
1463:
1464: return $result;
1465: }
1466: 1;
1467:
1.3 bowersj2 1468: package Apache::lonwizard::choose_student;
1469:
1470: no strict;
1.14 bowersj2 1471: @ISA = ("Apache::lonwizard::state");
1.3 bowersj2 1472: use strict;
1473:
1474: sub new {
1475: my $proto = shift;
1476: my $class = ref($proto) || $proto;
1.14 bowersj2 1477: my $self = bless $proto->SUPER::new(shift, shift, shift);
1478:
1479: $self->{MESSAGE_BEFORE} = shift;
1480: $self->{NEXT_STATE} = shift;
1481: $self->{VAR_NAME} = shift;
1482: $self->{MULTICHOICE} = shift;
1483:
1.3 bowersj2 1484: return $self;
1485: }
1486:
1.14 bowersj2 1487: sub render {
1488: my $self = shift;
1489: my $result = '';
1490: my $var = $self->{VAR_NAME};
1491: my $buttons = '';
1492:
1493: if ($self->{MULTICHOICE}) {
1494: $result = <<SCRIPT;
1495: <script>
1496: function checkall(value) {
1497: for (i=0; i<document.forms.wizform.elements.length; i++) {
1498: document.forms.wizform.elements[i].checked=value;
1499: }
1500: }
1501: </script>
1502: SCRIPT
1503: $buttons = <<BUTTONS;
1504: <input type="button" onclick="checkall(true)" value="Select All" />
1505: <input type="button" onclick="checkall(false)" value="Unselect All" />
1506: <br />
1507: BUTTONS
1508: }
1509:
1510: if (defined $self->{ERROR_MSG}) {
1511: $result .= '<font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br /><br />';
1512: }
1513:
1514: if (defined $self->{MESSAGE_BEFORE}) {
1515: $result .= $self->{MESSAGE_BEFORE} . '<br /><br />';
1516: }
1517:
1518: $result .= $buttons;
1519:
1520: my $choices = &Apache::loncoursedata::get_classlist();
1521:
1522: my @keys = keys %{$choices};
1523: # Sort by: Section, name
1.15 bowersj2 1524:
1525: my $section = Apache::loncoursedata::CL_SECTION();
1526: my $fullname = Apache::loncoursedata::CL_FULLNAME();
1527:
1.14 bowersj2 1528: @keys = sort {
1.15 bowersj2 1529: if ($choices->{$a}->[$section] ne $choices->{$b}->[$section]) {
1530: return $choices->{$a}->[$section] cmp $choices->{$b}->[$section];
1.14 bowersj2 1531: }
1.15 bowersj2 1532: return $choices->{$a}->[$fullname] cmp $choices->{$b}->[$fullname];
1.14 bowersj2 1533: } @keys;
1534:
1535: my $type = 'radio';
1536: if ($self->{MULTICHOICE}) { $type = 'checkbox'; }
1537: $result .= "<table cellspacing='2' cellpadding='2' border='0'>\n";
1538: $result .= "<tr><td></td><td align='center'><b>Student Name</b></td>".
1539: "<td align='center'><b>Section</b></td></tr>";
1540:
1541: foreach (@keys) {
1542: $result .= "<tr><td><input type='$type' name='" .
1543: $self->{VAR_NAME} . '.forminput' .
1544: "' value='" . HTML::Entities::encode($_)
1.15 bowersj2 1545: . "' /></td><td>"
1546: . HTML::Entities::encode($choices->{$_}->[$fullname])
1.14 bowersj2 1547: . "</td><td align='center'>"
1.15 bowersj2 1548: . HTML::Entities::encode($choices->{$_}->[$section])
1.14 bowersj2 1549: . "</td></tr>\n";
1550: }
1551:
1552: $result .= "</table>\n\n";
1553: $result .= $buttons;
1554:
1555: return $result;
1556: }
1.3 bowersj2 1557:
1.14 bowersj2 1558: sub postprocess {
1559: my $self = shift;
1560: my $wizard = $self->{WIZARD};
1561: my $formvalue = $ENV{'form.' . $self->{VAR_NAME} . '.forminput'};
1562: if ($formvalue) {
1563: if ($self->{MULTICHOICE}) {
1564: $self->process_multiple_choices($self->{VAR_NAME}.'.forminput',
1565: $self->{VAR_NAME});
1566: }
1567: $wizard->changeState($self->{NEXT_STATE});
1568: } else {
1569: $self->{ERROR_MSG} = "Can't continue the wizard because you must make"
1570: . ' a selection to continue.';
1.3 bowersj2 1571: }
1.14 bowersj2 1572: return 1;
1.3 bowersj2 1573: }
1.14 bowersj2 1574:
1.3 bowersj2 1575:
1576: 1;
1577:
1578: package Apache::lonwizard::choose_section;
1579:
1580: no strict;
1581: @ISA = ("Apache::lonwizard::choice_state");
1582: use strict;
1583:
1584: sub new {
1585: my $proto = shift;
1586: my $class = ref($proto) || $proto;
1587: my $self = bless $proto->SUPER::new(shift, shift, shift, shift,
1588: shift, shift, shift);
1589: return $self;
1590: }
1591:
1592: sub determineChoices {
1593: my %choices;
1594:
1595: my $classlist = Apache::loncoursedata::get_classlist();
1596: foreach (keys %$classlist) {
1597: my $sectionName = $classlist->{$_}->[5];
1598: if (!$sectionName) {
1599: $choices{"No section assigned"} = "";
1600: } else {
1601: $choices{$sectionName} = $sectionName;
1602: }
1603: }
1604:
1605: return \%choices;
1606: }
1607:
1608: 1;
1.1 bowersj2 1609:
1.10 bowersj2 1610: package Apache::lonwizard::choose_files;
1611:
1612: =pod
1613:
1614: =head2 Class: choose_file
1615:
1616: choose_file offers a choice of files from a given directory. It will store them as a triple-pipe delimited list in its given wizard variable, in the standard HTML multiple-selection tradition. A filter function can be passed, which will examine the filename and return 1 if it should be displayed, or 0 if not.
1617:
1618: =over 4
1619:
1.15 bowersj2 1620: =item * overridden method B<new>(parentLonWizReference, stateName, stateTitle, messageBefore, nextState, varName, subdir, filterFunc): As in previous states, where filterFunc is as described in choose_file. subdir is the name of the subdirectory to offer choices from.
1.10 bowersj2 1621:
1622: =back
1623:
1624: =cut
1625:
1626: no strict;
1627: @ISA = ("Apache::lonwizard::state");
1628: use strict;
1629:
1630: sub new {
1631: my $proto = shift;
1632: my $class = ref($proto) || $proto;
1633: my $self = bless $proto->SUPER::new(shift, shift, shift);
1634:
1635: $self->{MESSAGE_BEFORE} = shift;
1636: $self->{NEXT_STATE} = shift;
1637: $self->{VAR_NAME} = shift;
1638: $self->{SUB_DIR} = shift;
1639: $self->{FILTER_FUNC} = shift;
1640:
1641: if (!defined($self->{FILTER_FUNC})) {
1642: $self->{FILTER_FUNC} = sub {return 1;};
1643: }
1644:
1645: return $self;
1646: }
1647:
1648: sub render {
1649: my $self = shift;
1650: my $result = '';
1651: my $var = $self->{VAR_NAME};
1652: my $subdir = $self->{SUB_DIR};
1653: my $filterFunc = $self->{FILTER_FUNC};
1654:
1655: $result = <<SCRIPT;
1656: <script>
1657: function checkall(value) {
1658: for (i=0; i<document.forms.wizform.elements.length; i++) {
1659: ele = document.forms.wizform.elements[i];
1660: if (ele.type == "checkbox") {
1661: document.forms.wizform.elements[i].checked=value;
1662: }
1663: }
1664: }
1665: </script>
1666: SCRIPT
1667:
1668: my $buttons = <<BUTTONS;
1669: <br />
1670: <input type="button" onclick="checkall(true)" value="Select All" />
1671: <input type="button" onclick="checkall(false)" value="Unselect All" />
1672: <br />
1673: BUTTONS
1674:
1675: if (defined $self->{ERROR_MSG}) {
1676: $result .= '<font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br /><br />';
1677: }
1678:
1679: if ($self->{MESSAGE_BEFORE}) {
1680: $result .= $self->{MESSAGE_BEFORE} . '<br />';
1681: }
1682:
1683: # Get the list of files in this directory.
1684: my @fileList;
1685:
1686: # If the subdirectory is in local CSTR space
1687: if ($subdir =~ m|/home/([^/]+)/public_html|) {
1688: my $user = $1;
1689: my $domain = $Apache::lonnet::perlvar{'lonDefDomain'};
1690: @fileList = &Apache::lonnet::dirlist($subdir, $domain, $user, '');
1691: } else {
1692: # local library server resource space
1693: @fileList = &Apache::lonnet::dirlist($subdir, $ENV{'user.domain'}, $ENV{'user.name'}, '');
1694: }
1695:
1696: $result .= $buttons;
1697:
1698: $result .= '<table border="0" cellpadding="1" cellspacing="1">';
1699:
1700: # Keeps track if there are no choices, prints appropriate error
1701: # if there are none.
1702: my $choices = 0;
1703: # Print each legitimate file choice.
1704: for my $file (@fileList) {
1705: $file = (split(/&/, $file))[0];
1706: my $fileName = $subdir .'/'. $file;
1707: if (&$filterFunc($file)) {
1708: $result .= '<tr><td align="right">' .
1709: "<input type='checkbox' name='" . $self->{VAR_NAME}
1710: . ".forminput' value='" . HTML::Entities::encode($fileName) .
1711: "' /></td><td>" . $file . "</td></tr>\n";
1712: $choices++;
1713: }
1714: }
1715:
1716: $result .= "</table>\n";
1717:
1718: if (!$choices) {
1719: $result .= '<font color="#FF0000">There are no files available to select in this directory. Please go back and select another option.</font><br /><br />';
1720: }
1721:
1722: $result .= $buttons;
1723:
1724: return $result;
1725: }
1726:
1727: sub postprocess {
1728: my $self = shift;
1729: print $self->{NEXT_STATE};
1730: my $wizard = $self->{WIZARD};
1731:
1.11 bowersj2 1732: $self->process_multiple_choices($self->{VAR_NAME}.'.forminput',
1733: $self->{VAR_NAME});
1734:
1735: if (!$wizard->{VARS}->{$self->{VAR_NAME}}) {
1.10 bowersj2 1736: $self->{ERROR_MSG} = "Can't continue the wizard because you ".
1737: "must make a selection to continue.";
1738: }
1739: return 1;
1740: }
1741:
1742: 1;
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