version 1.28, 2003/05/14 18:58:21
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version 1.54, 2003/10/09 14:37:48
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=pod |
=pod |
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=head1 lonhelper - HTML Helper framework for LON-CAPA |
=head1 NAME |
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Helpers, often known as "wizards", are well-established UI widgets that users |
lonhelper - implements helper framework |
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=head1 SYNOPSIS |
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lonhelper implements the helper framework for LON-CAPA, and provides |
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many generally useful components for that framework. |
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Helpers are little programs which present the user with a sequence of |
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simple choices, instead of one monolithic multi-dimensional |
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choice. They are also referred to as "wizards", "druids", and |
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other potentially trademarked or semantically-loaded words. |
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=head1 OVERVIEWX<lonhelper> |
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Helpers are well-established UI widgets that users |
feel comfortable with. It can take a complicated multidimensional problem the |
feel comfortable with. It can take a complicated multidimensional problem the |
user has and turn it into a series of bite-sized one-dimensional questions. |
user has and turn it into a series of bite-sized one-dimensional questions. |
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Line 46 directory and having the .helper file ex
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Line 60 directory and having the .helper file ex
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All classes are in the Apache::lonhelper namespace. |
All classes are in the Apache::lonhelper namespace. |
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=head2 lonhelper XML file format |
=head1 lonhelper XML file formatX<lonhelper, XML file format> |
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A helper consists of a top-level <helper> tag which contains a series of states. |
A helper consists of a top-level <helper> tag which contains a series of states. |
Each state contains one or more state elements, which are what the user sees, like |
Each state contains one or more state elements, which are what the user sees, like |
messages, resource selections, or date queries. |
messages, resource selections, or date queries. |
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The helper tag is required to have one attribute, "title", which is the name |
The helper tag is required to have one attribute, "title", which is the name |
of the helper itself, such as "Parameter helper". |
of the helper itself, such as "Parameter helper". The helper tag may optionally |
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have a "requiredpriv" attribute, specifying the priviledge a user must have |
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to use the helper, or get denied access. See loncom/auth/rolesplain.tab for |
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useful privs. Default is full access, which is often wrong! |
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=head2 State tags |
=head2 State tags |
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Line 84 Of course this does nothing. In order fo
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Line 101 Of course this does nothing. In order fo
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necessary to put actual elements into the wizard. Documentation for each |
necessary to put actual elements into the wizard. Documentation for each |
of these elements follows. |
of these elements follows. |
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=head2 Creating a Helper With Code, Not XML |
=head1 Creating a Helper With Code, Not XML |
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In some situations, such as the printing wizard (see lonprintout.pm), |
In some situations, such as the printing wizard (see lonprintout.pm), |
writing the helper in XML would be too complicated, because of scope |
writing the helper in XML would be too complicated, because of scope |
Line 143 Normally the machinery in the XML format
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Line 160 Normally the machinery in the XML format
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adding states can easily be done by wrapping the state in a <condition> |
adding states can easily be done by wrapping the state in a <condition> |
tag. This should only be used when the code dominates the XML content, |
tag. This should only be used when the code dominates the XML content, |
the code is so complicated that it is difficult to get access to |
the code is so complicated that it is difficult to get access to |
all of the information you need because of scoping issues, or so much |
all of the information you need because of scoping issues, or would-be <exec> or |
of the information used is persistent because would-be <exec> or |
<eval> blocks using the {DATA} mechanism results in hard-to-read |
<eval> blocks that using the {DATA} mechanism results in hard-to-read |
and -maintain code. (See course.initialization.helper for a borderline |
and -maintain code. |
case.) |
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It is possible to do some of the work with an XML fragment parsed by |
It is possible to do some of the work with an XML fragment parsed by |
lonxml; again, see lonprintout.pm for an example. In that case it is |
lonxml; again, see lonprintout.pm for an example. In that case it is |
Line 207 my $paramHash;
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Line 224 my $paramHash;
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# mod_perl connection. In this code, it was manifesting itself in the existence |
# mod_perl connection. In this code, it was manifesting itself in the existence |
# of two seperate file-scoped $helper variables, one set to the value of the |
# of two seperate file-scoped $helper variables, one set to the value of the |
# helper in the helper constructor, and one referenced by the handler on the |
# helper in the helper constructor, and one referenced by the handler on the |
# "$helper->process()" line. The second was therefore never set, and was still |
# "$helper->process()" line. Using the debugger, one could actually |
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# see the two different $helper variables, as hashes at completely |
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# different addresses. The second was therefore never set, and was still |
# undefined when I tried to call process on it. |
# undefined when I tried to call process on it. |
# By pushing the "real handler" down into the "real scope", everybody except the |
# By pushing the "real handler" down into the "real scope", everybody except the |
# actual handler function directly below this comment gets the same $helper and |
# actual handler function directly below this comment gets the same $helper and |
Line 257 sub real_handler {
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Line 276 sub real_handler {
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# xml parsing |
# xml parsing |
&Apache::lonxml::xmlparse($r, 'helper', $file); |
&Apache::lonxml::xmlparse($r, 'helper', $file); |
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my $allowed = $helper->allowedCheck(); |
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if (!$allowed) { |
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$ENV{'user.error.msg'} = $ENV{'request.uri'}.':'.$helper->{REQUIRED_PRIV}. |
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":0:0:Permission denied to access this helper."; |
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return HTTP_NOT_ACCEPTABLE; |
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} |
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$helper->process(); |
$helper->process(); |
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$r->print($helper->display()); |
$r->print($helper->display()); |
return OK; |
return OK; |
} |
} |
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sub registerHelperTags { |
sub registerHelperTags { |
Line 284 sub start_helper {
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Line 310 sub start_helper {
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registerHelperTags(); |
registerHelperTags(); |
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Apache::lonhelper::helper->new($token->[2]{'title'}); |
Apache::lonhelper::helper->new($token->[2]{'title'}, $token->[2]{'requiredpriv'}); |
return ''; |
return ''; |
} |
} |
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Line 343 sub new {
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Line 369 sub new {
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my $self = {}; |
my $self = {}; |
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$self->{TITLE} = shift; |
$self->{TITLE} = shift; |
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$self->{REQUIRED_PRIV} = shift; |
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# If there is a state from the previous form, use that. If there is no |
# If there is a state from the previous form, use that. If there is no |
# state, use the start state parameter. |
# state, use the start state parameter. |
Line 467 sub declareVar {
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Line 494 sub declareVar {
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} |
} |
} |
} |
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sub allowedCheck { |
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my $self = shift; |
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if (!defined($self->{REQUIRED_PRIV})) { |
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return 1; |
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} |
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return Apache::lonnet::allowed($self->{REQUIRED_PRIV}, $ENV{'request.course.id'}); |
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} |
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sub changeState { |
sub changeState { |
my $self = shift; |
my $self = shift; |
$self->{STATE} = shift; |
$self->{STATE} = shift; |
Line 549 sub display {
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Line 586 sub display {
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HEADER |
HEADER |
if (!$state->overrideForm()) { $result.="<form name='helpform' method='POST'>"; } |
if (!$state->overrideForm()) { $result.="<form name='helpform' method='POST'>"; } |
$result .= <<HEADER; |
$result .= <<HEADER; |
<table border="0"><tr><td> |
<table border="0" width='100%'><tr><td> |
<h2><i>$stateTitle</i></h2> |
<h2><i>$stateTitle</i></h2> |
HEADER |
HEADER |
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$result .= "<table cellpadding='10' width='100%'><tr><td rowspan='2' valign='top'>"; |
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if (!$state->overrideForm()) { |
if (!$state->overrideForm()) { |
$result .= $self->_saveVars(); |
$result .= $self->_saveVars(); |
} |
} |
$result .= $state->render() . "<p> </p>"; |
$result .= $state->render(); |
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$result .= "</td><td valign='top' align='right'>"; |
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# Warning: Copy and pasted from below, because it's too much trouble to |
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# turn this into a subroutine |
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if (!$state->overrideForm()) { |
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if ($self->{STATE} ne $self->{START_STATE}) { |
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#$result .= '<input name="SUBMIT" type="submit" value="<- Previous" /> '; |
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} |
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if ($self->{DONE}) { |
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my $returnPage = $self->{RETURN_PAGE}; |
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$result .= "<a href=\"$returnPage\">End Helper</a>"; |
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} |
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else { |
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$result .= '<nobr><input name="back" type="button" '; |
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$result .= 'value="<- Previous" onclick="history.go(-1)" /> '; |
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$result .= '<input name="SUBMIT" type="submit" value="Next ->" /></nobr>'; |
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} |
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} |
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$result .= "</td></tr><tr><td valign='bottom' align='right'>"; |
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# Warning: Copy and pasted from above, because it's too much trouble to |
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# turn this into a subroutine |
if (!$state->overrideForm()) { |
if (!$state->overrideForm()) { |
$result .= '<center>'; |
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if ($self->{STATE} ne $self->{START_STATE}) { |
if ($self->{STATE} ne $self->{START_STATE}) { |
#$result .= '<input name="SUBMIT" type="submit" value="<- Previous" /> '; |
#$result .= '<input name="SUBMIT" type="submit" value="<- Previous" /> '; |
} |
} |
Line 568 HEADER
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Line 629 HEADER
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$result .= "<a href=\"$returnPage\">End Helper</a>"; |
$result .= "<a href=\"$returnPage\">End Helper</a>"; |
} |
} |
else { |
else { |
$result .= '<input name="back" type="button" '; |
$result .= '<nobr><input name="back" type="button" '; |
$result .= 'value="<- Previous" onclick="history.go(-1)" /> '; |
$result .= 'value="<- Previous" onclick="history.go(-1)" /> '; |
$result .= '<input name="SUBMIT" type="submit" value="Next ->" />'; |
$result .= '<input name="SUBMIT" type="submit" value="Next ->" /></nobr>'; |
} |
} |
$result .= "</center>\n"; |
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} |
} |
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#foreach my $key (keys %{$self->{VARS}}) { |
#foreach my $key (keys %{$self->{VARS}}) { |
# $result .= "|$key| -> " . $self->{VARS}->{$key} . "<br />"; |
# $result .= "|$key| -> " . $self->{VARS}->{$key} . "<br />"; |
#} |
#} |
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$result .= "</td></tr></table>"; |
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$result .= <<FOOTER; |
$result .= <<FOOTER; |
</td> |
</td> |
</tr> |
</tr> |
Line 684 sub addElement {
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Line 746 sub addElement {
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push @{$self->{ELEMENTS}}, $element; |
push @{$self->{ELEMENTS}}, $element; |
} |
} |
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use Data::Dumper; |
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sub render { |
sub render { |
my $self = shift; |
my $self = shift; |
my @results = (); |
my @results = (); |
Line 703 package Apache::lonhelper::element;
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Line 764 package Apache::lonhelper::element;
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=pod |
=pod |
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=head2 Element Base Class |
=head1 Element Base Class |
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The Apache::lonhelper::element base class provides support for elements |
The Apache::lonhelper::element base class provides support for elements |
and defines some generally useful tags for use in elements. |
and defines some generally useful tags for use in elements. |
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B<finalcode tag> |
=head2 finalcode tagX<finalcode> |
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Each element can contain a "finalcode" tag that, when the special FINAL |
Each element can contain a "finalcode" tag that, when the special FINAL |
helper state is used, will be executed, surrounded by "sub { my $helper = shift;" |
helper state is used, will be executed, surrounded by "sub { my $helper = shift;" |
Line 717 may be an empty string. See course initi
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Line 778 may be an empty string. See course initi
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generally intended for helpers like the course initialization helper, which consist |
generally intended for helpers like the course initialization helper, which consist |
of several panels, each of which is performing some sort of bite-sized functionality. |
of several panels, each of which is performing some sort of bite-sized functionality. |
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B<defaultvalue tag> |
=head2 defaultvalue tagX<defaultvalue> |
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Each element that accepts user input can contain a "defaultvalue" tag that, |
Each element that accepts user input can contain a "defaultvalue" tag that, |
when surrounded by "sub { my $helper = shift; my $state = shift; " and "}", |
when surrounded by "sub { my $helper = shift; my $state = shift; " and "}", |
Line 734 some setting accidentally.
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Line 795 some setting accidentally.
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Again, see the course initialization helper for examples. |
Again, see the course initialization helper for examples. |
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=head2 validator tagX<validator> |
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Some elements that accepts user input can contain a "validator" tag that, |
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when surrounded by "sub { my $helper = shift; my $state = shift; my $element = shift; my $val = shift " |
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and "}", where "$val" is the value the user entered, will form a subroutine |
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that when called will verify whether the given input is valid or not. If it |
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is valid, the routine will return a false value. If invalid, the routine |
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will return an error message to be displayed for the user. |
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Consult the documentation for each element to see whether it supports this |
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tag. |
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=head2 getValue methodX<getValue (helper elements)> |
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If the element stores the name of the variable in a 'variable' member, which |
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the provided ones all do, you can retreive the value of the variable by calling |
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this method. |
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=cut |
=cut |
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BEGIN { |
BEGIN { |
&Apache::lonhelper::register('Apache::lonhelper::element', |
&Apache::lonhelper::register('Apache::lonhelper::element', |
('nextstate', 'finalcode', |
('nextstate', 'finalcode', |
'defaultvalue')); |
'defaultvalue', 'validator')); |
} |
} |
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# Because we use the param hash, this is often a sufficent |
# Because we use the param hash, this is often a sufficent |
Line 804 sub start_defaultvalue {
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Line 883 sub start_defaultvalue {
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sub end_defaultvalue { return ''; } |
sub end_defaultvalue { return ''; } |
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sub start_validator { |
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my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
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if ($target ne 'helper') { |
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return ''; |
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} |
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$paramHash->{VALIDATOR} = &Apache::lonxml::get_all_text('/validator', |
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$parser); |
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$paramHash->{VALIDATOR} = 'sub { my $helper = shift; my $state = shift; my $element = shift; my $val = shift;' . |
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$paramHash->{VALIDATOR} . '}'; |
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return ''; |
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} |
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sub end_validator { return ''; } |
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sub preprocess { |
sub preprocess { |
return 1; |
return 1; |
} |
} |
Line 820 sub overrideForm {
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Line 915 sub overrideForm {
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return 0; |
return 0; |
} |
} |
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sub getValue { |
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my $self = shift; |
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return $helper->{VARS}->{$self->{'variable'}}; |
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} |
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1; |
1; |
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package Apache::lonhelper::message; |
package Apache::lonhelper::message; |
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=pod |
=pod |
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=head2 Element: message |
=head1 Elements |
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=head2 Element: messageX<message, helper element> |
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Message elements display the contents of their <message_text> tags, and |
Message elements display their contents, and |
transition directly to the state in the <nextstate> tag. Example: |
transition directly to the state in the <nextstate> attribute. Example: |
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<message> |
<message nextstate='GET_NAME'> |
<nextstate>GET_NAME</nextstate> |
This is the <b>message</b> the user will see, |
<message_text>This is the <b>message</b> the user will see, |
<i>HTML allowed</i>. |
<i>HTML allowed</i>.</message_text> |
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</message> |
</message> |
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This will display the HTML message and transition to the <nextstate> if |
This will display the HTML message and transition to the 'nextstate' if |
given. The HTML will be directly inserted into the helper, so if you don't |
given. The HTML will be directly inserted into the helper, so if you don't |
want text to run together, you'll need to manually wrap the <message_text> |
want text to run together, you'll need to manually wrap the message text |
in <p> tags, or whatever is appropriate for your HTML. |
in <p> tags, or whatever is appropriate for your HTML. |
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Message tags do not add in whitespace, so if you want it, you'll need to add |
Message tags do not add in whitespace, so if you want it, you'll need to add |
Line 914 package Apache::lonhelper::choices;
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Line 1015 package Apache::lonhelper::choices;
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=pod |
=pod |
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=head2 Element: choices |
=head2 Element: choicesX<choices, helper element> |
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Choice states provide a single choice to the user as a text selection box. |
Choice states provide a single choice to the user as a text selection box. |
A "choice" is two pieces of text, one which will be displayed to the user |
A "choice" is two pieces of text, one which will be displayed to the user |
Line 932 value, will allow the user to select mul
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Line 1033 value, will allow the user to select mul
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value, will allow the user to select none of the choices without raising |
value, will allow the user to select none of the choices without raising |
an error message. |
an error message. |
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B<SUB-TAGS> |
=head3 SUB-TAGS |
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<choices> can have the following subtags: |
<choices> can have the following subtags:X<choice, helper tag> |
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=over 4 |
=over 4 |
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=item * <nextstate>state_name</nextstate>: If given, this will cause the |
=item * <nextstate>state_name</nextstate>: If given, this will cause the |
choice element to transition to the given state after executing. If |
choice element to transition to the given state after executing. |
this is used, do not pass nextstates to the <choice> tag. |
This will override the <nextstate> passed to <choices> (if any). |
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=item * <choice />: If the choices are static, |
=item * <choice />: If the choices are static, |
this element will allow you to specify them. Each choice |
this element will allow you to specify them. Each choice |
Line 949 B<SUB-TAGS>
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Line 1050 B<SUB-TAGS>
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For example, |
For example, |
<choice computer='234-12-7312'>Bobby McDormik</choice>. |
<choice computer='234-12-7312'>Bobby McDormik</choice>. |
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<choice> can take a parameter "eval", which if set to |
<choice> can take a parameter "eval", which if set to |
a true value, will cause the contents of the tag to be |
a true value, will cause the contents of the tag to be |
evaluated as it would be in an <eval> tag; see <eval> tag |
evaluated as it would be in an <eval> tag; see <eval> tag |
below. |
below. |
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<choice> may optionally contain a 'nextstate' attribute, which |
<choice> may optionally contain a 'nextstate' attribute, which |
will be the state transisitoned to if the choice is made, if |
will be the state transistioned to if the choice is made, if |
the choice is not multichoice. |
the choice is not multichoice. This will override the nextstate |
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passed to the parent C<choices> tag. |
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=back |
=back |
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Line 981 You can mix and match methods of creatin
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Line 1083 You can mix and match methods of creatin
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"push" onto the choice list, rather then wiping it out. (You can even |
"push" onto the choice list, rather then wiping it out. (You can even |
remove choices programmatically, but that would probably be bad form.) |
remove choices programmatically, but that would probably be bad form.) |
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B<defaultvalue support> |
=head3 defaultvalue support |
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Choices supports default values both in multichoice and single choice mode. |
Choices supports default values both in multichoice and single choice mode. |
In single choice mode, have the defaultvalue tag's function return the |
In single choice mode, have the defaultvalue tag's function return the |
Line 1058 sub end_choice {
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Line 1160 sub end_choice {
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} |
} |
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sub render { |
sub render { |
# START HERE: Replace this with correct choices code. |
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my $self = shift; |
my $self = shift; |
my $var = $self->{'variable'}; |
my $var = $self->{'variable'}; |
my $buttons = ''; |
my $buttons = ''; |
Line 1104 BUTTONS
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Line 1205 BUTTONS
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if (defined($self->{DEFAULT_VALUE})) { |
if (defined($self->{DEFAULT_VALUE})) { |
$checkedChoicesFunc = eval ($self->{DEFAULT_VALUE}); |
$checkedChoicesFunc = eval ($self->{DEFAULT_VALUE}); |
die 'Error in default value code for variable ' . |
die 'Error in default value code for variable ' . |
{'variable'} . ', Perl said:' . $@ if $@; |
$self->{'variable'} . ', Perl said: ' . $@ if $@; |
} else { |
} else { |
$checkedChoicesFunc = sub { return ''; }; |
$checkedChoicesFunc = sub { return ''; }; |
} |
} |
Line 1191 sub postprocess {
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Line 1292 sub postprocess {
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} |
} |
1; |
1; |
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package Apache::lonhelper::dropdown; |
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=pod |
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=head2 Element: dropdownX<dropdown, helper tag> |
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A drop-down provides a drop-down box instead of a radio button |
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box. Because most people do not know how to use a multi-select |
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drop-down box, that option is not allowed. Otherwise, the arguments |
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are the same as "choices", except "allowempty" is also meaningless. |
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<dropdown> takes an attribute "variable" to control which helper variable |
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the result is stored in. |
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=head3 SUB-TAGS |
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<choice>, which acts just as it does in the "choices" element. |
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=cut |
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no strict; |
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@ISA = ("Apache::lonhelper::element"); |
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use strict; |
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BEGIN { |
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&Apache::lonhelper::register('Apache::lonhelper::dropdown', |
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('dropdown')); |
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} |
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sub new { |
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my $ref = Apache::lonhelper::element->new(); |
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bless($ref); |
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} |
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# CONSTRUCTION: Construct the message element from the XML |
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sub start_dropdown { |
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my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
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if ($target ne 'helper') { |
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return ''; |
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} |
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# Need to initialize the choices list, so everything can assume it exists |
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$paramHash->{'variable'} = $token->[2]{'variable'} if (!defined($paramHash->{'variable'})); |
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$helper->declareVar($paramHash->{'variable'}); |
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$paramHash->{CHOICES} = []; |
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return ''; |
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} |
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sub end_dropdown { |
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my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
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if ($target ne 'helper') { |
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return ''; |
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} |
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Apache::lonhelper::dropdown->new(); |
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return ''; |
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} |
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sub render { |
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my $self = shift; |
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my $var = $self->{'variable'}; |
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my $result = ''; |
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if (defined $self->{ERROR_MSG}) { |
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$result .= '<br /><font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br />'; |
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} |
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my %checkedChoices; |
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my $checkedChoicesFunc; |
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if (defined($self->{DEFAULT_VALUE})) { |
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$checkedChoicesFunc = eval ($self->{DEFAULT_VALUE}); |
|
die 'Error in default value code for variable ' . |
|
$self->{'variable'} . ', Perl said: ' . $@ if $@; |
|
} else { |
|
$checkedChoicesFunc = sub { return ''; }; |
|
} |
|
|
|
# single choice |
|
my $selectedChoice = &$checkedChoicesFunc($helper, $self); |
|
|
|
my $foundChoice = 0; |
|
|
|
# check that the choice is in the list of choices. |
|
for my $choice (@{$self->{CHOICES}}) { |
|
if ($choice->[1] eq $selectedChoice) { |
|
$checkedChoices{$choice->[1]} = 1; |
|
$foundChoice = 1; |
|
} |
|
} |
|
|
|
# If we couldn't find the choice, pick the first one |
|
if (!$foundChoice) { |
|
$checkedChoices{$self->{CHOICES}->[0]->[1]} = 1; |
|
} |
|
|
|
$result .= "<select name='${var}.forminput'>\n"; |
|
foreach my $choice (@{$self->{CHOICES}}) { |
|
$result .= "<option value='" . |
|
HTML::Entities::encode($choice->[1]) |
|
. "'"; |
|
if ($checkedChoices{$choice->[1]}) { |
|
$result .= " selected"; |
|
} |
|
my $choiceLabel = $choice->[0]; |
|
if ($choice->[4]) { # if we need to evaluate this choice |
|
$choiceLabel = "sub { my $helper = shift; my $state = shift;" . |
|
$choiceLabel . "}"; |
|
$choiceLabel = eval($choiceLabel); |
|
$choiceLabel = &$choiceLabel($helper, $self); |
|
} |
|
$result .= ">" . $choiceLabel . "\n"; |
|
} |
|
$result .= "</select>\n"; |
|
|
|
return $result; |
|
} |
|
|
|
# If a NEXTSTATE was given or a nextstate for this choice was |
|
# given, switch to it |
|
sub postprocess { |
|
my $self = shift; |
|
my $chosenValue = $ENV{'form.' . $self->{'variable'} . '.forminput'}; |
|
|
|
if (!defined($chosenValue) && !$self->{'allowempty'}) { |
|
$self->{ERROR_MSG} = "You must choose one or more choices to" . |
|
" continue."; |
|
return 0; |
|
} |
|
|
|
if (defined($self->{NEXTSTATE})) { |
|
$helper->changeState($self->{NEXTSTATE}); |
|
} |
|
|
|
foreach my $choice (@{$self->{CHOICES}}) { |
|
if ($choice->[1] eq $chosenValue) { |
|
if (defined($choice->[2])) { |
|
$helper->changeState($choice->[2]); |
|
} |
|
} |
|
} |
|
return 1; |
|
} |
|
1; |
|
|
package Apache::lonhelper::date; |
package Apache::lonhelper::date; |
|
|
=pod |
=pod |
|
|
=head2 Element: date |
=head2 Element: dateX<date, helper element> |
|
|
Date elements allow the selection of a date with a drop down list. |
Date elements allow the selection of a date with a drop down list. |
|
|
Line 1405 package Apache::lonhelper::resource;
|
Line 1652 package Apache::lonhelper::resource;
|
|
|
=pod |
=pod |
|
|
=head2 Element: resource |
=head2 Element: resourceX<resource, helper element> |
|
|
<resource> elements allow the user to select one or multiple resources |
<resource> elements allow the user to select one or multiple resources |
from the current course. You can filter out which resources they can view, |
from the current course. You can filter out which resources they can view, |
Line 1415 selections across folder openings and cl
|
Line 1662 selections across folder openings and cl
|
the user can manipulate the folders. |
the user can manipulate the folders. |
|
|
<resource> takes the standard variable attribute to control what helper |
<resource> takes the standard variable attribute to control what helper |
variable stores the results. It also takes a "multichoice" attribute, |
variable stores the results. It also takes a "multichoice"X<multichoice> attribute, |
which controls whether the user can select more then one resource. The |
which controls whether the user can select more then one resource. The |
"toponly" attribute controls whether the resource display shows just the |
"toponly" attribute controls whether the resource display shows just the |
resources in that sequence, or recurses into all sub-sequences, defaulting |
resources in that sequence, or recurses into all sub-sequences, defaulting |
to false. |
to false. The "suppressEmptySequences" attribute reflects the |
|
suppressEmptySequences argument to the render routine, which will cause |
|
folders that have all of their contained resources filtered out to also |
|
be filtered out. The 'addstatus' attribute, if true, will add the icon |
|
and long status display columns to the display. |
|
|
B<SUB-TAGS> |
=head3 SUB-TAGS |
|
|
=over 4 |
=over 4 |
|
|
=item * <filterfunc>: If you want to filter what resources are displayed |
=item * <filterfunc>X<filterfunc>: If you want to filter what resources are displayed |
to the user, use a filter func. The <filterfunc> tag should contain |
to the user, use a filter func. The <filterfunc> tag should contain |
Perl code that when wrapped with "sub { my $res = shift; " and "}" is |
Perl code that when wrapped with "sub { my $res = shift; " and "}" is |
a function that returns true if the resource should be displayed, |
a function that returns true if the resource should be displayed, |
Line 1433 B<SUB-TAGS>
|
Line 1684 B<SUB-TAGS>
|
(See Apache::lonnavmaps documentation for information about the |
(See Apache::lonnavmaps documentation for information about the |
resource object.) |
resource object.) |
|
|
=item * <choicefunc>: Same as <filterfunc>, except that controls whether |
=item * <choicefunc>X<choicefunc>: Same as <filterfunc>, except that controls whether |
the given resource can be chosen. (It is almost always a good idea to |
the given resource can be chosen. (It is almost always a good idea to |
show the user the folders, for instance, but you do not always want to |
show the user the folders, for instance, but you do not always want to |
let the user select them.) |
let the user select them.) |
|
|
=item * <nextstate>: Standard nextstate behavior. |
=item * <nextstate>: Standard nextstate behavior. |
|
|
=item * <valuefunc>: This function controls what is returned by the resource |
=item * <valuefunc>X<valuefunc>: This function controls what is returned by the resource |
when the user selects it. Like filterfunc and choicefunc, it should be |
when the user selects it. Like filterfunc and choicefunc, it should be |
a function fragment that when wrapped by "sub { my $res = shift; " and |
a function fragment that when wrapped by "sub { my $res = shift; " and |
"}" returns a string representing what you want to have as the value. By |
"}" returns a string representing what you want to have as the value. By |
default, the value will be the resource ID of the object ($res->{ID}). |
default, the value will be the resource ID of the object ($res->{ID}). |
|
|
=item * <mapurl>: If the URL of a map is given here, only that map |
=item * <mapurl>X<mapurl>: If the URL of a map is given here, only that map |
will be displayed, instead of the whole course. |
will be displayed, instead of the whole course. If the attribute |
|
"evaluate" is given and is true, the contents of the mapurl will be |
|
evaluated with "sub { my $helper = shift; my $state = shift;" and |
|
"}", with the return value used as the mapurl. |
|
|
=back |
=back |
|
|
Line 1480 sub start_resource {
|
Line 1734 sub start_resource {
|
$paramHash->{'variable'} = $token->[2]{'variable'}; |
$paramHash->{'variable'} = $token->[2]{'variable'}; |
$helper->declareVar($paramHash->{'variable'}); |
$helper->declareVar($paramHash->{'variable'}); |
$paramHash->{'multichoice'} = $token->[2]{'multichoice'}; |
$paramHash->{'multichoice'} = $token->[2]{'multichoice'}; |
|
$paramHash->{'suppressEmptySequences'} = $token->[2]{'suppressEmptySequences'}; |
$paramHash->{'toponly'} = $token->[2]{'toponly'}; |
$paramHash->{'toponly'} = $token->[2]{'toponly'}; |
|
$paramHash->{'addstatus'} = $token->[2]{'addstatus'}; |
return ''; |
return ''; |
} |
} |
|
|
Line 1557 sub start_mapurl {
|
Line 1813 sub start_mapurl {
|
|
|
my $contents = Apache::lonxml::get_all_text('/mapurl', |
my $contents = Apache::lonxml::get_all_text('/mapurl', |
$parser); |
$parser); |
|
$paramHash->{EVAL_MAP_URL} = $token->[2]{'evaluate'}; |
$paramHash->{MAP_URL} = $contents; |
$paramHash->{MAP_URL} = $contents; |
} |
} |
|
|
Line 1612 BUTTONS
|
Line 1869 BUTTONS
|
my $filterFunc = $self->{FILTER_FUNC}; |
my $filterFunc = $self->{FILTER_FUNC}; |
my $choiceFunc = $self->{CHOICE_FUNC}; |
my $choiceFunc = $self->{CHOICE_FUNC}; |
my $valueFunc = $self->{VALUE_FUNC}; |
my $valueFunc = $self->{VALUE_FUNC}; |
my $mapUrl = $self->{MAP_URL}; |
|
my $multichoice = $self->{'multichoice'}; |
my $multichoice = $self->{'multichoice'}; |
|
|
|
# Evaluate the map url as needed |
|
my $mapUrl; |
|
if ($self->{EVAL_MAP_URL}) { |
|
my $mapUrlFunc = eval('sub { my $helper = shift; my $state = shift; ' . |
|
$self->{MAP_URL} . '}'); |
|
$mapUrl = &$mapUrlFunc($helper, $self); |
|
} else { |
|
$mapUrl = $self->{MAP_URL}; |
|
} |
|
|
# Create the composite function that renders the column on the nav map |
# Create the composite function that renders the column on the nav map |
# have to admit any language that lets me do this can't be all bad |
# have to admit any language that lets me do this can't be all bad |
# - Jeremy (Pythonista) ;-) |
# - Jeremy (Pythonista) ;-) |
Line 1634 BUTTONS
|
Line 1900 BUTTONS
|
$col .= "checked "; |
$col .= "checked "; |
$checked = 1; |
$checked = 1; |
} |
} |
|
if ($multichoice) { # all resources start checked; see bug 1174 |
|
$col .= "checked "; |
|
$checked = 1; |
|
} |
$col .= "value='" . |
$col .= "value='" . |
HTML::Entities::encode(&$valueFunc($resource)) |
HTML::Entities::encode(&$valueFunc($resource)) |
. "' /></td>"; |
. "' /></td>"; |
Line 1642 BUTTONS
|
Line 1912 BUTTONS
|
}; |
}; |
|
|
$ENV{'form.condition'} = !$self->{'toponly'}; |
$ENV{'form.condition'} = !$self->{'toponly'}; |
|
my $cols = [$renderColFunc, Apache::lonnavmaps::resource()]; |
|
if ($self->{'addstatus'}) { |
|
push @$cols, (Apache::lonnavmaps::part_status_summary()); |
|
|
|
} |
$result .= |
$result .= |
&Apache::lonnavmaps::render( { 'cols' => [$renderColFunc, |
&Apache::lonnavmaps::render( { 'cols' => $cols, |
Apache::lonnavmaps::resource()], |
|
'showParts' => 0, |
'showParts' => 0, |
'filterFunc' => $filterFunc, |
'filterFunc' => $filterFunc, |
'resource_no_folder_link' => 1, |
'resource_no_folder_link' => 1, |
|
'suppressEmptySequences' => $self->{'suppressEmptySequences'}, |
'iterator_map' => $mapUrl } |
'iterator_map' => $mapUrl } |
); |
); |
|
|
Line 1677 package Apache::lonhelper::student;
|
Line 1952 package Apache::lonhelper::student;
|
|
|
=pod |
=pod |
|
|
=head2 Element: student |
=head2 Element: studentX<student, helper element> |
|
|
Student elements display a choice of students enrolled in the current |
Student elements display a choice of students enrolled in the current |
course. Currently it is primitive; this is expected to evolve later. |
course. Currently it is primitive; this is expected to evolve later. |
|
|
Student elements take two attributes: "variable", which means what |
Student elements take the following attributes: |
it usually does, and "multichoice", which if true allows the user |
|
to select multiple students. |
=over 4 |
|
|
|
=item * B<variable>: |
|
|
|
Does what it usually does: declare which helper variable to put the |
|
result in. |
|
|
|
=item * B<multichoice>: |
|
|
|
If true allows the user to select multiple students. Defaults to false. |
|
|
|
=item * B<coursepersonnel>: |
|
|
|
If true adds the course personnel to the top of the student |
|
selection. Defaults to false. |
|
|
|
=item * B<activeonly>: |
|
|
|
If true, only active students and course personnel will be |
|
shown. Defaults to false. |
|
|
|
=back |
|
|
=cut |
=cut |
|
|
Line 1714 sub start_student {
|
Line 2010 sub start_student {
|
$paramHash->{'variable'} = $token->[2]{'variable'}; |
$paramHash->{'variable'} = $token->[2]{'variable'}; |
$helper->declareVar($paramHash->{'variable'}); |
$helper->declareVar($paramHash->{'variable'}); |
$paramHash->{'multichoice'} = $token->[2]{'multichoice'}; |
$paramHash->{'multichoice'} = $token->[2]{'multichoice'}; |
|
$paramHash->{'coursepersonnel'} = $token->[2]{'coursepersonnel'}; |
|
$paramHash->{'sctiveonly'} = $token->[2]{'activeonly'}; |
if (defined($token->[2]{'nextstate'})) { |
if (defined($token->[2]{'nextstate'})) { |
$paramHash->{NEXTSTATE} = $token->[2]{'nextstate'}; |
$paramHash->{NEXTSTATE} = $token->[2]{'nextstate'}; |
} |
} |
Line 1746 sub render {
|
Line 2044 sub render {
|
} |
} |
} |
} |
} |
} |
|
function checksec(value) { |
|
for (i=0; i<document.forms.helpform.elements.length; i++) { |
|
comp = document.forms.helpform.elements.chksec.value; |
|
if (document.forms.helpform.elements[i].value.indexOf(':'+comp+':') != -1) { |
|
document.forms.helpform.elements[i].checked=value; |
|
} |
|
} |
|
} |
|
function checkactive() { |
|
for (i=0; i<document.forms.helpform.elements.length; i++) { |
|
if (document.forms.helpform.elements[i].value.indexOf(':Active') != -1) { |
|
document.forms.helpform.elements[i].checked=true; |
|
} |
|
} |
|
} |
</script> |
</script> |
SCRIPT |
SCRIPT |
$buttons = <<BUTTONS; |
$buttons = <<BUTTONS; |
<br /> |
<br /> |
|
<input type="button" onclick="checkactive()" value="Select Only Current Students" /> |
<input type="button" onclick="checkall(true, '$var')" value="Select All Students" /> |
<input type="button" onclick="checkall(true, '$var')" value="Select All Students" /> |
<input type="button" onclick="checkall(false, '$var')" value="Unselect All Students" /> |
<input type="button" onclick="checkall(false, '$var')" value="Unselect All Students" /> |
<br /> |
<br /> |
|
<input type="button" onclick="checksec(true)" value="Select for Section/Group"> |
|
<input type="text" size="5" name="chksec"> |
|
<input type="button" onclick="checksec(false)" value="Unselect for Section/Group"> |
|
|
|
<br /> |
BUTTONS |
BUTTONS |
} |
} |
|
|
Line 1760 BUTTONS
|
Line 2079 BUTTONS
|
$result .= '<font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br /><br />'; |
$result .= '<font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br /><br />'; |
} |
} |
|
|
# Load up the students |
my $choices = []; |
my $choices = &Apache::loncoursedata::get_classlist(); |
|
my @keys = keys %{$choices}; |
# Load up the non-students, if necessary |
|
if ($self->{'coursepersonnel'}) { |
|
my %coursepersonnel = Apache::lonnet::get_course_adv_roles(); |
|
for (sort keys %coursepersonnel) { |
|
for my $role (split /,/, $coursepersonnel{$_}) { |
|
# extract the names so we can sort them |
|
my @people; |
|
|
|
for (split /,/, $role) { |
|
push @people, [split /:/, $role]; |
|
} |
|
|
|
@people = sort { $a->[0] cmp $b->[0] } @people; |
|
|
|
for my $person (@people) { |
|
push @$choices, [join(':', @$person), $person->[0], '', $_]; |
|
} |
|
} |
|
} |
|
} |
|
|
# Constants |
# Constants |
my $section = Apache::loncoursedata::CL_SECTION(); |
my $section = Apache::loncoursedata::CL_SECTION(); |
my $fullname = Apache::loncoursedata::CL_FULLNAME(); |
my $fullname = Apache::loncoursedata::CL_FULLNAME(); |
|
my $status = Apache::loncoursedata::CL_STATUS(); |
|
|
|
# Load up the students |
|
my $classlist = &Apache::loncoursedata::get_classlist(); |
|
my @keys = keys %{$classlist}; |
# Sort by: Section, name |
# Sort by: Section, name |
@keys = sort { |
@keys = sort { |
if ($choices->{$a}->[$section] ne $choices->{$b}->[$section]) { |
if ($classlist->{$a}->[$section] ne $classlist->{$b}->[$section]) { |
return $choices->{$a}->[$section] cmp $choices->{$b}->[$section]; |
return $classlist->{$a}->[$section] cmp $classlist->{$b}->[$section]; |
} |
} |
return $choices->{$a}->[$fullname] cmp $choices->{$b}->[$fullname]; |
return $classlist->{$a}->[$fullname] cmp $classlist->{$b}->[$fullname]; |
} @keys; |
} @keys; |
|
|
|
# username, fullname, section, type |
|
for (@keys) { |
|
# Filter out inactive students if we've set "activeonly" |
|
if (!$self->{'activeonly'} || $classlist->{$_}->[$status] eq |
|
'Active') { |
|
push @$choices, [$_, $classlist->{$_}->[$fullname], |
|
$classlist->{$_}->[$section], |
|
$classlist->{$_}->[$status], 'Student']; |
|
} |
|
} |
|
|
|
my $name = $self->{'coursepersonnel'} ? 'Name' : 'Student Name'; |
my $type = 'radio'; |
my $type = 'radio'; |
if ($self->{'multichoice'}) { $type = 'checkbox'; } |
if ($self->{'multichoice'}) { $type = 'checkbox'; } |
$result .= "<table cellspacing='2' cellpadding='2' border='0'>\n"; |
$result .= "<table cellspacing='2' cellpadding='2' border='0'>\n"; |
$result .= "<tr><td></td><td align='center'><b>Student Name</b></td>". |
$result .= "<tr><td></td><td align='center'><b>$name</b></td>". |
"<td align='center'><b>Section</b></td></tr>"; |
"<td align='center'><b>Section</b></td>" . |
|
"<td align='center'><b>Status</b></td>" . |
|
"<td align='center'><b>Role</b></td>" . |
|
"<td align='center'><b>Username:Domain</b></td></tr>"; |
|
|
my $checked = 0; |
my $checked = 0; |
foreach (@keys) { |
for my $choice (@$choices) { |
$result .= "<tr><td><input type='$type' name='" . |
$result .= "<tr><td><input type='$type' name='" . |
$self->{'variable'} . '.forminput' . "'"; |
$self->{'variable'} . '.forminput' . "'"; |
|
|
Line 1792 BUTTONS
|
Line 2149 BUTTONS
|
$checked = 1; |
$checked = 1; |
} |
} |
$result .= |
$result .= |
" value='" . HTML::Entities::encode($_ . ':' . $choices->{$_}->[$section]) |
" value='" . HTML::Entities::encode($choice->[0] . ':' . $choice->[2] . ':' . $choice->[1] . ':' . $choice->[3]) |
. "' /></td><td>" |
. "' /></td><td>" |
. HTML::Entities::encode($choices->{$_}->[$fullname]) |
. HTML::Entities::encode($choice->[1]) |
. "</td><td align='center'>" |
. "</td><td align='center'>" |
. HTML::Entities::encode($choices->{$_}->[$section]) |
. HTML::Entities::encode($choice->[2]) |
. "</td></tr>\n"; |
. "</td>\n<td>" |
|
. HTML::Entities::encode($choice->[3]) |
|
. "</td>\n<td>" |
|
. HTML::Entities::encode($choice->[4]) |
|
. "</td>\n<td>" |
|
. HTML::Entities::encode($choice->[0]) |
|
. "</td></tr>\n"; |
} |
} |
|
|
$result .= "</table>\n\n"; |
$result .= "</table>\n\n"; |
Line 1829 package Apache::lonhelper::files;
|
Line 2192 package Apache::lonhelper::files;
|
|
|
=pod |
=pod |
|
|
=head2 Element: files |
=head2 Element: filesX<files, helper element> |
|
|
files allows the users to choose files from a given directory on the |
files allows the users to choose files from a given directory on the |
server. It is always multichoice and stores the result as a triple-pipe |
server. It is always multichoice and stores the result as a triple-pipe |
Line 1845 are put. It accepts the attribute "multi
|
Line 2208 are put. It accepts the attribute "multi
|
defaulting to false, which if true will allow the user to select more |
defaulting to false, which if true will allow the user to select more |
then one choice. |
then one choice. |
|
|
<files> accepts three subtags. One is the "nextstate" sub-tag that works |
<files> accepts three subtags: |
as it does with the other tags. Another is a <filechoice> sub tag that |
|
is Perl code that, when surrounded by "sub {" and "}" will return a |
=over 4 |
string representing what directory on the server to allow the user to |
|
choose files from. Finally, the <filefilter> subtag should contain Perl |
=item * B<nextstate>: works as it does with the other tags. |
code that when surrounded by "sub { my $filename = shift; " and "}", |
|
returns a true value if the user can pick that file, or false otherwise. |
=item * B<filechoice>: When the contents of this tag are surrounded by |
The filename passed to the function will be just the name of the file, |
"sub {" and "}", will return a string representing what directory |
with no path info. |
on the server to allow the user to choose files from. |
|
|
|
=item * B<filefilter>: Should contain Perl code that when surrounded |
|
by "sub { my $filename = shift; " and "}", returns a true value if |
|
the user can pick that file, or false otherwise. The filename |
|
passed to the function will be just the name of the file, with no |
|
path info. By default, a filter function will be used that will |
|
mask out old versions of files. This function is available as |
|
Apache::lonhelper::files::not_old_version if you want to use it to |
|
composite your own filters. |
|
|
|
=back |
|
|
|
B<General security note>: You should ensure the user can not somehow |
|
pass something into your code that would allow them to look places |
|
they should not be able to see, like the C</etc/> directory. However, |
|
the security impact would be minimal, since it would only expose |
|
the existence of files, there should be no way to parlay that into |
|
viewing the files. |
|
|
=cut |
=cut |
|
|
Line 1861 no strict;
|
Line 2242 no strict;
|
@ISA = ("Apache::lonhelper::element"); |
@ISA = ("Apache::lonhelper::element"); |
use strict; |
use strict; |
|
|
|
use Apache::lonpubdir; # for getTitleString |
|
|
BEGIN { |
BEGIN { |
&Apache::lonhelper::register('Apache::lonhelper::files', |
&Apache::lonhelper::register('Apache::lonhelper::files', |
('files', 'filechoice', 'filefilter')); |
('files', 'filechoice', 'filefilter')); |
} |
} |
|
|
|
sub not_old_version { |
|
my $file = shift; |
|
|
|
# Given a file name, return false if it is an "old version" of a |
|
# file, or true if it is not. |
|
|
|
if ($file =~ /^.*\.[0-9]+\.[A-Za-z]+(\.meta)?$/) { |
|
return 0; |
|
} |
|
return 1; |
|
} |
|
|
sub new { |
sub new { |
my $ref = Apache::lonhelper::element->new(); |
my $ref = Apache::lonhelper::element->new(); |
bless($ref); |
bless($ref); |
Line 1933 sub render {
|
Line 2328 sub render {
|
my $subdir = &$subdirFunc(); |
my $subdir = &$subdirFunc(); |
|
|
my $filterFunc = $self->{FILTER_FUNC}; |
my $filterFunc = $self->{FILTER_FUNC}; |
|
if (!defined($filterFunc)) { |
|
$filterFunc = ¬_old_version; |
|
} |
my $buttons = ''; |
my $buttons = ''; |
my $type = 'radio'; |
my $type = 'radio'; |
if ($self->{'multichoice'}) { |
if ($self->{'multichoice'}) { |
Line 1980 BUTTONS
|
Line 2378 BUTTONS
|
my @fileList; |
my @fileList; |
|
|
# If the subdirectory is in local CSTR space |
# If the subdirectory is in local CSTR space |
if ($subdir =~ m|/home/([^/]+)/public_html|) { |
my $metadir; |
|
if ($subdir =~ m|/home/([^/]+)/public_html/(.*)|) { |
|
my $user = $1; |
|
my $domain = $Apache::lonnet::perlvar{'lonDefDomain'}; |
|
$metadir='/res/'.$domain.'/'.$user.'/'.$2; |
|
@fileList = &Apache::lonnet::dirlist($subdir, $domain, $user, ''); |
|
} elsif ($subdir =~ m|^~([^/]+)/(.*)$|) { |
|
$subdir='/home/'.$1.'/public_html/'.$2; |
my $user = $1; |
my $user = $1; |
my $domain = $Apache::lonnet::perlvar{'lonDefDomain'}; |
my $domain = $Apache::lonnet::perlvar{'lonDefDomain'}; |
|
$metadir='/res/'.$domain.'/'.$user.'/'.$2; |
@fileList = &Apache::lonnet::dirlist($subdir, $domain, $user, ''); |
@fileList = &Apache::lonnet::dirlist($subdir, $domain, $user, ''); |
} else { |
} else { |
# local library server resource space |
# local library server resource space |
@fileList = &Apache::lonnet::dirlist($subdir, $ENV{'user.domain'}, $ENV{'user.name'}, ''); |
@fileList = &Apache::lonnet::dirlist($subdir, $ENV{'user.domain'}, $ENV{'user.name'}, ''); |
} |
} |
|
|
|
# Sort the fileList into order |
|
@fileList = sort @fileList; |
|
|
$result .= $buttons; |
$result .= $buttons; |
|
|
if (defined $self->{ERROR_MSG}) { |
if (defined $self->{ERROR_MSG}) { |
Line 2017 BUTTONS
|
Line 2426 BUTTONS
|
$color = ''; |
$color = ''; |
} |
} |
|
|
|
# Get the title |
|
my $title = Apache::lonpubdir::getTitleString(($metadir?$metadir:$subdir) .'/'. $file); |
|
|
# Netscape 4 is stupid and there's nowhere to put the |
# Netscape 4 is stupid and there's nowhere to put the |
# information on the input tag that the file is Published, |
# information on the input tag that the file is Published, |
# Unpublished, etc. In *real* browsers we can just say |
# Unpublished, etc. In *real* browsers we can just say |
Line 2043 BUTTONS
|
Line 2455 BUTTONS
|
if (!$self->{'multichoice'} && $choices == 0) { |
if (!$self->{'multichoice'} && $choices == 0) { |
$result .= ' checked'; |
$result .= ' checked'; |
} |
} |
$result .= "/></td><td bgcolor='$color'>" . $file . |
$result .= "/></td><td bgcolor='$color'>" . $file . "</td>" . |
"</td><td bgcolor='$color'>$status</td></tr>\n"; |
"<td bgcolor='$color'>$title</td>" . |
|
"<td bgcolor='$color'>$status</td>" . "</tr>\n"; |
$choices++; |
$choices++; |
} |
} |
} |
} |
Line 2052 BUTTONS
|
Line 2465 BUTTONS
|
$result .= "</table>\n"; |
$result .= "</table>\n"; |
|
|
if (!$choices) { |
if (!$choices) { |
$result .= '<font color="#FF0000">There are no files available to select in this directory. Please go back and select another option.</font><br /><br />'; |
$result .= '<font color="#FF0000">There are no files available to select in this directory ('.$subdir.'). Please go back and select another option.</font><br /><br />'; |
} |
} |
|
|
$result .= $buttons; |
$result .= $buttons; |
Line 2113 package Apache::lonhelper::section;
|
Line 2526 package Apache::lonhelper::section;
|
|
|
=pod |
=pod |
|
|
=head2 Element: section |
=head2 Element: sectionX<section, helper element> |
|
|
<section> allows the user to choose one or more sections from the current |
<section> allows the user to choose one or more sections from the current |
course. |
course. |
Line 2183 sub end_section {
|
Line 2596 sub end_section {
|
} |
} |
1; |
1; |
|
|
|
package Apache::lonhelper::string; |
|
|
|
=pod |
|
|
|
=head2 Element: stringX<string, helper element> |
|
|
|
string elements provide a string entry field for the user. string elements |
|
take the usual 'variable' and 'nextstate' parameters. string elements |
|
also pass through 'maxlength' and 'size' attributes to the input tag. |
|
|
|
string honors the defaultvalue tag, if given. |
|
|
|
string honors the validation function, if given. |
|
|
|
=cut |
|
|
|
no strict; |
|
@ISA = ("Apache::lonhelper::element"); |
|
use strict; |
|
|
|
BEGIN { |
|
&Apache::lonhelper::register('Apache::lonhelper::string', |
|
('string')); |
|
} |
|
|
|
sub new { |
|
my $ref = Apache::lonhelper::element->new(); |
|
bless($ref); |
|
} |
|
|
|
# CONSTRUCTION: Construct the message element from the XML |
|
sub start_string { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
|
|
$paramHash->{'variable'} = $token->[2]{'variable'}; |
|
$helper->declareVar($paramHash->{'variable'}); |
|
$paramHash->{'nextstate'} = $token->[2]{'nextstate'}; |
|
$paramHash->{'maxlength'} = $token->[2]{'maxlength'}; |
|
$paramHash->{'size'} = $token->[2]{'size'}; |
|
|
|
return ''; |
|
} |
|
|
|
sub end_string { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
Apache::lonhelper::string->new(); |
|
return ''; |
|
} |
|
|
|
sub render { |
|
my $self = shift; |
|
my $result = ''; |
|
|
|
if (defined $self->{ERROR_MSG}) { |
|
$result .= '<br /><font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br /><br />'; |
|
} |
|
|
|
$result .= '<input type="string" name="' . $self->{'variable'} . '.forminput"'; |
|
|
|
if (defined($self->{'size'})) { |
|
$result .= ' size="' . $self->{'size'} . '"'; |
|
} |
|
if (defined($self->{'maxlength'})) { |
|
$result .= ' maxlength="' . $self->{'maxlength'} . '"'; |
|
} |
|
|
|
if (defined($self->{DEFAULT_VALUE})) { |
|
my $valueFunc = eval($self->{DEFAULT_VALUE}); |
|
die 'Error in default value code for variable ' . |
|
$self->{'variable'} . ', Perl said: ' . $@ if $@; |
|
$result .= ' value="' . &$valueFunc($helper, $self) . '"'; |
|
} |
|
|
|
$result .= ' />'; |
|
|
|
return $result; |
|
} |
|
|
|
# If a NEXTSTATE was given, switch to it |
|
sub postprocess { |
|
my $self = shift; |
|
|
|
if (defined($self->{VALIDATOR})) { |
|
my $validator = eval($self->{VALIDATOR}); |
|
die 'Died during evaluation of evaulation code; Perl said: ' . $@ if $@; |
|
my $invalid = &$validator($helper, $state, $self, $self->getValue()); |
|
if ($invalid) { |
|
$self->{ERROR_MSG} = $invalid; |
|
return 0; |
|
} |
|
} |
|
|
|
if (defined($self->{'nextstate'})) { |
|
$helper->changeState($self->{'nextstate'}); |
|
} |
|
|
|
return 1; |
|
} |
|
|
|
1; |
|
|
package Apache::lonhelper::general; |
package Apache::lonhelper::general; |
|
|
=pod |
=pod |
|
|
=head2 General-purpose tag: <exec> |
=head2 General-purpose tag: <exec>X<exec, helper tag> |
|
|
The contents of the exec tag are executed as Perl code, not inside a |
The contents of the exec tag are executed as Perl code, B<not> inside a |
safe space, so the full range of $ENV and such is available. The code |
safe space, so the full range of $ENV and such is available. The code |
will be executed as a subroutine wrapped with the following code: |
will be executed as a subroutine wrapped with the following code: |
|
|
Line 2202 The return value is ignored.
|
Line 2724 The return value is ignored.
|
$helper is the helper object. Feel free to add methods to the helper |
$helper is the helper object. Feel free to add methods to the helper |
object to support whatever manipulation you may need to do (for instance, |
object to support whatever manipulation you may need to do (for instance, |
overriding the form location if the state is the final state; see |
overriding the form location if the state is the final state; see |
lonparm.helper for an example). |
parameter.helper for an example). |
|
|
$state is the $paramHash that has currently been generated and may |
$state is the $paramHash that has currently been generated and may |
be manipulated by the code in exec. Note that the $state is not yet |
be manipulated by the code in exec. Note that the $state is not yet |
Line 2277 sub end_clause { return ''; }
|
Line 2799 sub end_clause { return ''; }
|
|
|
=pod |
=pod |
|
|
=head2 General-purpose tag: <eval> |
=head2 General-purpose tag: <eval>X<eval, helper tag> |
|
|
The <eval> tag will be evaluated as a subroutine call passed in the |
The <eval> tag will be evaluated as a subroutine call passed in the |
current helper object and state hash as described in <condition> above, |
current helper object and state hash as described in <condition> above, |
Line 2320 package Apache::lonhelper::final;
|
Line 2842 package Apache::lonhelper::final;
|
|
|
=pod |
=pod |
|
|
=head2 Element: final |
=head2 Element: finalX<final, helper tag> |
|
|
<final> is a special element that works with helpers that use the <finalcode> |
<final> is a special element that works with helpers that use the <finalcode> |
tag. It goes through all the states and elements, executing the <finalcode> |
tagX<finalcode, helper tag>. It goes through all the states and elements, executing the <finalcode> |
snippets and collecting the results. Finally, it takes the user out of the |
snippets and collecting the results. Finally, it takes the user out of the |
helper, going to a provided page. |
helper, going to a provided page. |
|
|
|
If the parameter "restartCourse" is true, this will override the buttons and |
|
will make a "Finish Helper" button that will re-initialize the course for them, |
|
which is useful for the Course Initialization helper so the users never see |
|
the old values taking effect. |
|
|
=cut |
=cut |
|
|
no strict; |
no strict; |
Line 2343 sub new {
|
Line 2870 sub new {
|
bless($ref); |
bless($ref); |
} |
} |
|
|
sub start_final { return ''; } |
sub start_final { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
|
|
$paramHash->{'restartCourse'} = $token->[2]{'restartCourse'}; |
|
|
|
return ''; |
|
} |
|
|
sub end_final { |
sub end_final { |
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
Line 2384 sub render {
|
Line 2921 sub render {
|
for my $element (@{$state->{ELEMENTS}}) { |
for my $element (@{$state->{ELEMENTS}}) { |
if (defined($element->{FINAL_CODE})) { |
if (defined($element->{FINAL_CODE})) { |
# Compile the code. |
# Compile the code. |
my $code = 'sub { my $helper = shift; ' . $element->{FINAL_CODE} . |
my $code = 'sub { my $helper = shift; my $element = shift; ' |
'}'; |
. $element->{FINAL_CODE} . '}'; |
$code = eval($code); |
$code = eval($code); |
die 'Error while executing final code for element with var ' . |
die 'Error while executing final code for element with var ' . |
$element->{'variable'} . ', Perl said: ' . $@ if $@; |
$element->{'variable'} . ', Perl said: ' . $@ if $@; |
|
|
my $result = &$code($helper); |
my $result = &$code($helper, $element); |
if ($result) { |
if ($result) { |
push @results, $result; |
push @results, $result; |
} |
} |
Line 2398 sub render {
|
Line 2935 sub render {
|
} |
} |
} |
} |
|
|
if (scalar(@results) == 0) { |
my $result; |
return ''; |
|
} |
|
|
|
my $result = "<ul>\n"; |
if (scalar(@results) != 0) { |
for my $re (@results) { |
$result .= "<ul>\n"; |
$result .= ' <li>' . $re . "</li>\n"; |
for my $re (@results) { |
|
$result .= ' <li>' . $re . "</li>\n"; |
|
} |
|
|
|
if (!@results) { |
|
$result .= ' <li>No changes were made to current settings.</li>'; |
|
} |
|
|
|
$result .= '</ul>'; |
|
} |
|
|
|
if ($self->{'restartCourse'}) { |
|
my $targetURL = '/adm/menu'; |
|
if ($ENV{'course.'.$ENV{'request.course.id'}.'.clonedfrom'}) { |
|
$targetURL = '/adm/parmset?overview=1'; |
|
} |
|
$result .= "<center>\n" . |
|
"<form action='/adm/roles' method='post' target='loncapaclient'>\n" . |
|
"<input type='button' onclick='history.go(-1)' value='<- Previous' />" . |
|
"<input type='hidden' name='orgurl' value='$targetURL' />" . |
|
"<input type='hidden' name='selectrole' value='1' />\n" . |
|
"<input type='hidden' name='" . $ENV{'request.role'} . |
|
"' value='1' />\n<input type='submit' value='Finish Course Initialization' />\n" . |
|
"</form></center>"; |
} |
} |
return $result . '</ul>'; |
|
|
return $result; |
|
} |
|
|
|
sub overrideForm { |
|
my $self = shift; |
|
return $self->{'restartCourse'}; |
} |
} |
|
|
1; |
1; |
Line 2451 sub render {
|
Line 3015 sub render {
|
my $vars = $helper->{VARS}; |
my $vars = $helper->{VARS}; |
|
|
# FIXME: Unify my designators with the standard ones |
# FIXME: Unify my designators with the standard ones |
my %dateTypeHash = ('open_date' => "Opening Date", |
my %dateTypeHash = ('open_date' => "opening date", |
'due_date' => "Due Date", |
'due_date' => "due date", |
'answer_date' => "Answer Date"); |
'answer_date' => "answer date", |
|
'tries' => 'number of tries', |
|
'weight' => 'problem weight' |
|
); |
my %parmTypeHash = ('open_date' => "0_opendate", |
my %parmTypeHash = ('open_date' => "0_opendate", |
'due_date' => "0_duedate", |
'due_date' => "0_duedate", |
'answer_date' => "0_answerdate"); |
'answer_date' => "0_answerdate", |
|
'tries' => '0_maxtries', |
|
'weight' => '0_weight' ); |
|
|
my $affectedResourceId = ""; |
my $affectedResourceId = ""; |
my $parm_name = $parmTypeHash{$vars->{ACTION_TYPE}}; |
my $parm_name = $parmTypeHash{$vars->{ACTION_TYPE}}; |
Line 2473 sub render {
|
Line 3042 sub render {
|
$symb = 'a'; |
$symb = 'a'; |
$paramlevel = 'general'; |
$paramlevel = 'general'; |
} elsif ($vars->{GRANULARITY} eq 'map') { |
} elsif ($vars->{GRANULARITY} eq 'map') { |
my $navmap = Apache::lonnavmaps::navmap->new( |
my $navmap = Apache::lonnavmaps::navmap->new(); |
$ENV{"request.course.fn"}.".db", |
my $res = $navmap->getByMapPc($vars->{RESOURCE_ID}); |
$ENV{"request.course.fn"}."_parms.db", 0, 0); |
|
my $res = $navmap->getById($vars->{RESOURCE_ID}); |
|
my $title = $res->compTitle(); |
my $title = $res->compTitle(); |
$symb = $res->symb(); |
$symb = $res->symb(); |
$navmap->untieHashes(); |
$navmap->untieHashes(); |
Line 2485 sub render {
|
Line 3052 sub render {
|
$affectedResourceId = $vars->{RESOURCE_ID}; |
$affectedResourceId = $vars->{RESOURCE_ID}; |
$paramlevel = 'map'; |
$paramlevel = 'map'; |
} else { |
} else { |
my $navmap = Apache::lonnavmaps::navmap->new( |
my $navmap = Apache::lonnavmaps::navmap->new(); |
$ENV{"request.course.fn"}.".db", |
|
$ENV{"request.course.fn"}."_parms.db", 0, 0); |
|
my $res = $navmap->getById($vars->{RESOURCE_ID}); |
my $res = $navmap->getById($vars->{RESOURCE_ID}); |
$symb = $res->symb(); |
$symb = $res->symb(); |
my $title = $res->compTitle(); |
my $title = $res->compTitle(); |
Line 2502 sub render {
|
Line 3067 sub render {
|
$result .= '<p>Confirm that this information is correct, then click "Finish Wizard" to complete setting the parameter.<ul>'; |
$result .= '<p>Confirm that this information is correct, then click "Finish Wizard" to complete setting the parameter.<ul>'; |
|
|
# Print the type of manipulation: |
# Print the type of manipulation: |
$result .= '<li>Setting the <b>' . $dateTypeHash{$vars->{ACTION_TYPE}} |
$result .= '<li>Setting the <b>' . $dateTypeHash{$vars->{ACTION_TYPE}} . '</b>'; |
. "</b></li>\n"; |
if ($vars->{ACTION_TYPE} eq 'tries') { |
|
$result .= ' to <b>' . $vars->{TRIES} . '</b>'; |
|
} |
|
if ($vars->{ACTION_TYPE} eq 'weight') { |
|
$result .= ' to <b>' . $vars->{WEIGHT} . '</b>'; |
|
} |
|
$result .= "</li>\n"; |
if ($vars->{ACTION_TYPE} eq 'due_date' || |
if ($vars->{ACTION_TYPE} eq 'due_date' || |
$vars->{ACTION_TYPE} eq 'answer_date') { |
$vars->{ACTION_TYPE} eq 'answer_date') { |
# for due dates, we default to "date end" type entries |
# for due dates, we default to "date end" type entries |
Line 2520 sub render {
|
Line 3091 sub render {
|
"value='" . $vars->{PARM_DATE} . "' />\n"; |
"value='" . $vars->{PARM_DATE} . "' />\n"; |
$result .= "<input type='hidden' name='pres_type' " . |
$result .= "<input type='hidden' name='pres_type' " . |
"value='date_start' />\n"; |
"value='date_start' />\n"; |
} |
} elsif ($vars->{ACTION_TYPE} eq 'tries') { |
|
$result .= "<input type='hidden' name='pres_value' " . |
|
"value='" . $vars->{TRIES} . "' />\n"; |
|
} elsif ($vars->{ACTION_TYPE} eq 'weight') { |
|
$result .= "<input type='hidden' name='pres_value' " . |
|
"value='" . $vars->{WEIGHT} . "' />\n"; |
|
} |
|
|
$result .= $resourceString; |
$result .= $resourceString; |
|
|
Line 2550 sub render {
|
Line 3127 sub render {
|
} |
} |
|
|
# Print value |
# Print value |
$result .= "<li>to <b>" . ctime($vars->{PARM_DATE}) . "</b> (" . |
if ($vars->{ACTION_TYPE} ne 'tries' && $vars->{ACTION_TYPE} ne 'weight') { |
Apache::lonnavmaps::timeToHumanString($vars->{PARM_DATE}) |
$result .= "<li>to <b>" . ctime($vars->{PARM_DATE}) . "</b> (" . |
. ")</li>\n"; |
Apache::lonnavmaps::timeToHumanString($vars->{PARM_DATE}) |
|
. ")</li>\n"; |
|
} |
|
|
# print pres_marker |
# print pres_marker |
$result .= "\n<input type='hidden' name='pres_marker'" . |
$result .= "\n<input type='hidden' name='pres_marker'" . |
" value='$affectedResourceId&$parm_name&$level' />\n"; |
" value='$affectedResourceId&$parm_name&$level' />\n"; |