version 1.4, 2003/03/28 20:25:19
|
version 1.155, 2006/06/25 21:50:25
|
Line 25
|
Line 25
|
# |
# |
# http://www.lon-capa.org/ |
# http://www.lon-capa.org/ |
# |
# |
# (Page Handler |
|
# |
|
# (.helper handler |
|
# |
|
|
|
=pod |
=pod |
|
|
=head1 lonhelper - HTML Helper framework for LON-CAPA |
=head1 NAME |
|
|
|
lonhelper - implements helper framework |
|
|
|
=head1 SYNOPSIS |
|
|
|
lonhelper implements the helper framework for LON-CAPA, and provides |
|
many generally useful components for that framework. |
|
|
Helpers, often known as "wizards", are well-established UI widgets that users |
Helpers are little programs which present the user with a sequence of |
|
simple choices, instead of one monolithic multi-dimensional |
|
choice. They are also referred to as "wizards", "druids", and |
|
other potentially trademarked or semantically-loaded words. |
|
|
|
=head1 OVERVIEWX<lonhelper> |
|
|
|
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. |
|
|
Line 46 directory and having the .helper file ex
|
Line 56 directory and having the .helper file ex
|
|
|
All classes are in the Apache::lonhelper namespace. |
All classes are in the Apache::lonhelper namespace. |
|
|
=head2 lonxml |
=head1 lonhelper XML file formatX<lonhelper, XML file format> |
|
|
The helper uses the lonxml XML parsing support. The following capabilities |
|
are directly imported from lonxml: |
|
|
|
=over 4 |
|
|
|
=item * <startouttext> and <endouttext>: These tags may be used, as in problems, |
|
to directly output text to the user. |
|
|
|
=back |
|
|
|
=head2 lonhelper XML file format |
|
|
|
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. |
|
|
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 |
|
have a "requiredpriv" attribute, specifying the priviledge a user must have |
|
to use the helper, or get denied access. See loncom/auth/rolesplain.tab for |
|
useful privs. Default is full access, which is often wrong! |
|
|
=head2 State tags |
=head2 State tags |
|
|
State tags are required to have an attribute "name", which is the symbolic |
State tags are required to have an attribute "name", which is the symbolic |
name of the state and will not be directly seen by the user. The wizard is |
name of the state and will not be directly seen by the user. The helper is |
required to have one state named "START", which is the state the wizard |
required to have one state named "START", which is the state the helper |
will start with. by convention, this state should clearly describe what |
will start with. By convention, this state should clearly describe what |
the helper will do for the user, and may also include the first information |
the helper will do for the user, and may also include the first information |
entry the user needs to do for the helper. |
entry the user needs to do for the helper. |
|
|
Line 96 Of course this does nothing. In order fo
|
Line 97 Of course this does nothing. In order fo
|
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. |
|
|
|
=head1 Creating a Helper With Code, Not XML |
|
|
|
In some situations, such as the printing wizard (see lonprintout.pm), |
|
writing the helper in XML would be too complicated, because of scope |
|
issues or the fact that the code actually outweighs the XML. It is |
|
possible to create a helper via code, though it is a little odd. |
|
|
|
Creating a helper via code is more like issuing commands to create |
|
a helper then normal code writing. For instance, elements will automatically |
|
be added to the last state created, so it's important to create the |
|
states in the correct order. |
|
|
|
First, create a new helper: |
|
|
|
use Apache::lonhelper; |
|
|
|
my $helper = Apache::lonhelper::new->("Helper Title"); |
|
|
|
Next you'll need to manually add states to the helper: |
|
|
|
Apache::lonhelper::state->new("STATE_NAME", "State's Human Title"); |
|
|
|
You don't need to save a reference to it because all elements up until |
|
the next state creation will automatically be added to this state. |
|
|
|
Elements are created by populating the $paramHash in |
|
Apache::lonhelper::paramhash. To prevent namespace issues, retrieve |
|
a reference to that has with getParamHash: |
|
|
|
my $paramHash = Apache::lonhelper::getParamHash(); |
|
|
|
You will need to do this for each state you create. |
|
|
|
Populate the $paramHash with the parameters for the element you wish |
|
to add next; the easiest way to find out what those entries are is |
|
to read the code. Some common ones are 'variable' to record the variable |
|
to store the results in, and NEXTSTATE to record a next state transition. |
|
|
|
Then create your element: |
|
|
|
$paramHash->{MESSAGETEXT} = "This is a message."; |
|
Apache::lonhelper::message->new(); |
|
|
|
The creation will take the $paramHash and bless it into a |
|
Apache::lonhelper::message object. To create the next element, you need |
|
to get a reference to the new, empty $paramHash: |
|
|
|
$paramHash = Apache::lonhelper::getParamHash(); |
|
|
|
and you can repeat creating elements that way. You can add states |
|
and elements as needed. |
|
|
|
See lonprintout.pm, subroutine printHelper for an example of this, where |
|
we dynamically add some states to prevent security problems, for instance. |
|
|
|
Normally the machinery in the XML format is sufficient; dynamically |
|
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, |
|
the code is so complicated that it is difficult to get access to |
|
all of the information you need because of scoping issues, or would-be <exec> or |
|
<eval> blocks using the {DATA} mechanism results in hard-to-read |
|
and -maintain code. (See course.initialization.helper for a borderline |
|
case.) |
|
|
|
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 |
|
imperative that you call B<Apache::lonhelper::registerHelperTags()> |
|
before parsing XML fragments and B<Apache::lonhelper::unregisterHelperTags()> |
|
when you are done. See lonprintout.pm for examples of this usage in the |
|
printHelper subroutine. |
|
|
|
=head2 Localization |
|
|
|
The helper framework tries to handle as much localization as |
|
possible. The text is always run through |
|
Apache::lonlocal::normalize_string, so be sure to run the keys through |
|
that function for maximum usefulness and robustness. |
|
|
=cut |
=cut |
|
|
package Apache::lonhelper; |
package Apache::lonhelper; |
use Apache::Constants qw(:common); |
use Apache::Constants qw(:common); |
use Apache::File; |
use Apache::File; |
use Apache::lonxml; |
use Apache::lonxml; |
|
use Apache::lonlocal; |
|
use Apache::lonnet; |
|
use Apache::longroup; |
|
use Apache::lonselstudent; |
|
use LONCAPA; |
|
|
|
# Register all the tags with the helper, so the helper can |
|
# push and pop them |
|
|
|
my @helperTags; |
|
|
|
sub register { |
|
my ($namespace, @tags) = @_; |
|
|
|
for my $tag (@tags) { |
|
push @helperTags, [$namespace, $tag]; |
|
} |
|
} |
|
|
BEGIN { |
BEGIN { |
&Apache::lonxml::register('Apache::lonhelper', |
Apache::lonxml::register('Apache::lonhelper', |
('helper', 'state')); |
('helper')); |
|
register('Apache::lonhelper', ('state')); |
} |
} |
|
|
# Since all wizards are only three levels deep (wizard tag, state tag, |
# Since all helpers are only three levels deep (helper tag, state tag, |
# substate type), it's easier and more readble to explicitly track |
# substate type), it's easier and more readble to explicitly track |
# those three things directly, rather then futz with the tag stack |
# those three things directly, rather then futz with the tag stack |
# every time. |
# every time. |
Line 120 my $substate;
|
Line 218 my $substate;
|
# end of the element tag is located. |
# end of the element tag is located. |
my $paramHash; |
my $paramHash; |
|
|
|
# Note from Jeremy 5-8-2003: It is *vital* that the real handler be called |
|
# as a subroutine from the handler, or very mysterious things might happen. |
|
# I don't know exactly why, but it seems that the scope where the Apache |
|
# server enters the perl handler is treated differently from the rest of |
|
# the handler. This also seems to manifest itself in the debugger as entering |
|
# the perl handler in seemingly random places (sometimes it starts in the |
|
# compiling phase, sometimes in the handler execution phase where it runs |
|
# the code and stepping into the "1;" the module ends with goes into the handler, |
|
# sometimes starting directly with the handler); I think the cause is related. |
|
# In the debugger, this means that breakpoints are ignored until you step into |
|
# a function and get out of what must be a "faked up scope" in the Apache-> |
|
# mod_perl connection. In this code, it was manifesting itself in the existence |
|
# of two separate 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->process()" line. Using the debugger, one could actually |
|
# see the two different $helper variables, as hashes at completely |
|
# different addresses. The second was therefore never set, and was still |
|
# undefined when I tried to call process on it. |
|
# 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 |
|
# everybody is happy. |
|
# The upshot of all of this is that for safety when a handler is using |
|
# file-scoped variables in LON-CAPA, the handler should be pushed down one |
|
# call level, as I do here, to ensure that the top-level handler function does |
|
# not get a different file scope from the rest of the code. |
sub handler { |
sub handler { |
my $r = shift; |
my $r = shift; |
$ENV{'request.uri'} = $r->uri(); |
return real_handler($r); |
my $filename = '/home/httpd/html' . $r->uri(); |
} |
|
|
|
# For debugging purposes, one can send a second parameter into this |
|
# function, the 'uri' of the helper you wish to have rendered, and |
|
# call this from other handlers. |
|
sub real_handler { |
|
my $r = shift; |
|
my $uri = shift; |
|
if (!defined($uri)) { $uri = $r->uri(); } |
|
$env{'request.uri'} = $uri; |
|
my $filename = '/home/httpd/html' . $uri; |
my $fh = Apache::File->new($filename); |
my $fh = Apache::File->new($filename); |
my $file; |
my $file; |
read $fh, $file, 100000000; |
read $fh, $file, 100000000; |
|
|
Apache::loncommon::get_unprocessed_cgi($ENV{QUERY_STRING}); |
|
|
|
# Send header, don't cache this page |
# Send header, don't cache this page |
if ($r->header_only) { |
if ($env{'browser.mathml'}) { |
if ($ENV{'browser.mathml'}) { |
&Apache::loncommon::content_type($r,'text/xml'); |
$r->content_type('text/xml'); |
|
} else { |
|
$r->content_type('text/html'); |
|
} |
|
$r->send_http_header; |
|
return OK; |
|
} |
|
if ($ENV{'browser.mathml'}) { |
|
$r->content_type('text/xml'); |
|
} else { |
} else { |
$r->content_type('text/html'); |
&Apache::loncommon::content_type($r,'text/html'); |
} |
} |
$r->send_http_header; |
$r->send_http_header; |
|
return OK if $r->header_only; |
$r->rflush(); |
$r->rflush(); |
|
|
# Discard result, we just want the objects that get created by the |
# Discard result, we just want the objects that get created by the |
# xml parsing |
# xml parsing |
&Apache::lonxml::xmlparse($r, 'helper', $file); |
&Apache::lonxml::xmlparse($r, 'helper', $file); |
|
|
|
my $allowed = $helper->allowedCheck(); |
|
if (!$allowed) { |
|
$env{'user.error.msg'} = $env{'request.uri'}.':'.$helper->{REQUIRED_PRIV}. |
|
":0:0:Permission denied to access this helper."; |
|
return HTTP_NOT_ACCEPTABLE; |
|
} |
|
|
|
$helper->process(); |
|
|
$r->print($helper->display()); |
$r->print($helper->display()); |
return OK; |
return OK; |
} |
} |
|
|
|
sub registerHelperTags { |
|
for my $tagList (@helperTags) { |
|
Apache::lonxml::register($tagList->[0], $tagList->[1]); |
|
} |
|
} |
|
|
|
sub unregisterHelperTags { |
|
for my $tagList (@helperTags) { |
|
Apache::lonxml::deregister($tagList->[0], $tagList->[1]); |
|
} |
|
} |
|
|
sub start_helper { |
sub start_helper { |
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
if ($target ne 'helper') { |
if ($target ne 'helper') { |
return ''; |
return ''; |
} |
} |
|
|
$helper = Apache::lonhelper::helper->new($token->[2]{'title'}); |
registerHelperTags(); |
|
|
|
Apache::lonhelper::helper->new($token->[2]{'title'}, $token->[2]{'requiredpriv'}); |
return ''; |
return ''; |
} |
} |
|
|
Line 173 sub end_helper {
|
Line 320 sub end_helper {
|
if ($target ne 'helper') { |
if ($target ne 'helper') { |
return ''; |
return ''; |
} |
} |
|
|
|
unregisterHelperTags(); |
|
|
return ''; |
return ''; |
} |
} |
|
|
Line 184 sub start_state {
|
Line 333 sub start_state {
|
return ''; |
return ''; |
} |
} |
|
|
$state = Apache::lonhelper::state->new($token->[2]{'name'}, |
Apache::lonhelper::state->new($token->[2]{'name'}, |
$token->[2]{'title'}); |
$token->[2]{'title'}); |
return ''; |
return ''; |
} |
} |
|
|
|
# Use this to get the param hash from other files. |
|
sub getParamHash { |
|
return $paramHash; |
|
} |
|
|
|
# Use this to get the helper, if implementing elements in other files |
|
# (like lonprintout.pm) |
|
sub getHelper { |
|
return $helper; |
|
} |
|
|
# don't need this, so ignore it |
# don't need this, so ignore it |
sub end_state { |
sub end_state { |
return ''; |
return ''; |
Line 199 sub end_state {
|
Line 359 sub end_state {
|
package Apache::lonhelper::helper; |
package Apache::lonhelper::helper; |
|
|
use Digest::MD5 qw(md5_hex); |
use Digest::MD5 qw(md5_hex); |
use HTML::Entities; |
use HTML::Entities(); |
use Apache::loncommon; |
use Apache::loncommon; |
use Apache::File; |
use Apache::File; |
|
use Apache::lonlocal; |
|
use Apache::lonnet; |
|
use LONCAPA; |
|
|
sub new { |
sub new { |
my $proto = shift; |
my $proto = shift; |
Line 209 sub new {
|
Line 372 sub new {
|
my $self = {}; |
my $self = {}; |
|
|
$self->{TITLE} = shift; |
$self->{TITLE} = shift; |
|
$self->{REQUIRED_PRIV} = shift; |
|
|
# 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. |
if (defined $ENV{"form.CURRENT_STATE"}) |
if (defined $env{"form.CURRENT_STATE"}) |
{ |
{ |
$self->{STATE} = $ENV{"form.CURRENT_STATE"}; |
$self->{STATE} = $env{"form.CURRENT_STATE"}; |
} |
} |
else |
else |
{ |
{ |
$self->{STATE} = "START"; |
$self->{STATE} = "START"; |
} |
} |
|
|
$self->{TOKEN} = $ENV{'form.TOKEN'}; |
$self->{TOKEN} = $env{'form.TOKEN'}; |
# If a token was passed, we load that in. Otherwise, we need to create a |
# If a token was passed, we load that in. Otherwise, we need to create a |
# new storage file |
# new storage file |
# Tried to use standard Tie'd hashes, but you can't seem to take a |
# Tried to use standard Tie'd hashes, but you can't seem to take a |
Line 239 sub new {
|
Line 403 sub new {
|
|
|
my $file = Apache::File->new($self->{FILENAME}); |
my $file = Apache::File->new($self->{FILENAME}); |
my $contents = <$file>; |
my $contents = <$file>; |
&Apache::loncommon::get_unprocessed_cgi($contents); |
|
|
# Now load in the contents |
|
for my $value (split (/&/, $contents)) { |
|
my ($name, $value) = split(/=/, $value); |
|
$value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg; |
|
$self->{VARS}->{$name} = $value; |
|
} |
|
|
$file->close(); |
$file->close(); |
} else { |
} else { |
# Only valid if we're just starting. |
# Only valid if we're just starting. |
Line 247 sub new {
|
Line 418 sub new {
|
return undef; |
return undef; |
} |
} |
# Must create the storage |
# Must create the storage |
$self->{TOKEN} = md5_hex($ENV{'user.name'} . $ENV{'user.domain'} . |
$self->{TOKEN} = md5_hex($env{'user.name'} . $env{'user.domain'} . |
time() . rand()); |
time() . rand()); |
$self->{FILENAME} = $Apache::lonnet::tmpdir . md5_hex($self->{TOKEN}); |
$self->{FILENAME} = $Apache::lonnet::tmpdir . md5_hex($self->{TOKEN}); |
} |
} |
|
|
# OK, we now have our persistent storage. |
# OK, we now have our persistent storage. |
|
|
if (defined $ENV{"form.RETURN_PAGE"}) |
if (defined $env{"form.RETURN_PAGE"}) |
{ |
{ |
$self->{RETURN_PAGE} = $ENV{"form.RETURN_PAGE"}; |
$self->{RETURN_PAGE} = $env{"form.RETURN_PAGE"}; |
} |
} |
else |
else |
{ |
{ |
Line 266 sub new {
|
Line 437 sub new {
|
$self->{STATES} = {}; |
$self->{STATES} = {}; |
$self->{DONE} = 0; |
$self->{DONE} = 0; |
|
|
|
# Used by various helpers for various things; see lonparm.helper |
|
# for an example. |
|
$self->{DATA} = {}; |
|
|
|
$helper = $self; |
|
|
|
# Establish the $paramHash |
|
$paramHash = {}; |
|
|
bless($self, $class); |
bless($self, $class); |
return $self; |
return $self; |
} |
} |
Line 276 sub _saveVars {
|
Line 456 sub _saveVars {
|
my $self = shift; |
my $self = shift; |
my $result = ""; |
my $result = ""; |
$result .= '<input type="hidden" name="CURRENT_STATE" value="' . |
$result .= '<input type="hidden" name="CURRENT_STATE" value="' . |
HTML::Entities::encode($self->{STATE}) . "\" />\n"; |
HTML::Entities::encode($self->{STATE},'<>&"') . "\" />\n"; |
$result .= '<input type="hidden" name="TOKEN" value="' . |
$result .= '<input type="hidden" name="TOKEN" value="' . |
$self->{TOKEN} . "\" />\n"; |
$self->{TOKEN} . "\" />\n"; |
$result .= '<input type="hidden" name="RETURN_PAGE" value="' . |
$result .= '<input type="hidden" name="RETURN_PAGE" value="' . |
HTML::Entities::encode($self->{RETURN_PAGE}) . "\" />\n"; |
HTML::Entities::encode($self->{RETURN_PAGE},'<>&"') . "\" />\n"; |
|
|
return $result; |
return $result; |
} |
} |
Line 290 sub _saveVars {
|
Line 470 sub _saveVars {
|
sub _varsInFile { |
sub _varsInFile { |
my $self = shift; |
my $self = shift; |
my @vars = (); |
my @vars = (); |
for my $key (keys %{$self->{VARS}}) { |
for my $key (keys(%{$self->{VARS}})) { |
push @vars, &Apache::lonnet::escape($key) . '=' . |
push(@vars, &escape($key) . '=' . &escape($self->{VARS}->{$key})); |
&Apache::lonnet::escape($self->{VARS}->{$key}); |
|
} |
} |
return join ('&', @vars); |
return join ('&', @vars); |
} |
} |
|
|
|
# Use this to declare variables. |
|
# FIXME: Document this |
|
sub declareVar { |
|
my $self = shift; |
|
my $var = shift; |
|
|
|
if (!defined($self->{VARS}->{$var})) { |
|
$self->{VARS}->{$var} = ''; |
|
} |
|
|
|
my $envname = 'form.' . $var . '.forminput'; |
|
if (defined($env{$envname})) { |
|
if (ref($env{$envname})) { |
|
$self->{VARS}->{$var} = join('|||', @{$env{$envname}}); |
|
} else { |
|
$self->{VARS}->{$var} = $env{$envname}; |
|
} |
|
} |
|
} |
|
|
|
sub allowedCheck { |
|
my $self = shift; |
|
|
|
if (!defined($self->{REQUIRED_PRIV})) { |
|
return 1; |
|
} |
|
|
|
return Apache::lonnet::allowed($self->{REQUIRED_PRIV}, $env{'request.course.id'}); |
|
} |
|
|
sub changeState { |
sub changeState { |
my $self = shift; |
my $self = shift; |
$self->{STATE} = shift; |
$self->{STATE} = shift; |
Line 310 sub registerState {
|
Line 519 sub registerState {
|
$self->{STATES}{$stateName} = $state; |
$self->{STATES}{$stateName} = $state; |
} |
} |
|
|
# Done in four phases |
sub process { |
# 1: Do the post processing for the previous state. |
|
# 2: Do the preprocessing for the current state. |
|
# 3: Check to see if state changed, if so, postprocess current and move to next. |
|
# Repeat until state stays stable. |
|
# 4: Render the current state to the screen as an HTML page. |
|
sub display { |
|
my $self = shift; |
my $self = shift; |
|
|
my $result = ""; |
|
|
|
# Phase 1: Post processing for state of previous screen (which is actually |
# Phase 1: Post processing for state of previous screen (which is actually |
# the "current state" in terms of the helper variables), if it wasn't the |
# the "current state" in terms of the helper variables), if it wasn't the |
# beginning state. |
# beginning state. |
if ($self->{STATE} ne "START" || $ENV{"form.SUBMIT"} eq "Next ->") { |
if ($self->{STATE} ne "START" || $env{"form.SUBMIT"} eq &mt("Next ->")) { |
my $prevState = $self->{STATES}{$self->{STATE}}; |
my $prevState = $self->{STATES}{$self->{STATE}}; |
$prevState->postprocess(); |
$prevState->postprocess(); |
} |
} |
|
|
# Note, to handle errors in a state's input that a user must correct, |
# Note, to handle errors in a state's input that a user must correct, |
Line 335 sub display {
|
Line 536 sub display {
|
|
|
# Phase 2: Preprocess current state |
# Phase 2: Preprocess current state |
my $startState = $self->{STATE}; |
my $startState = $self->{STATE}; |
my $state = $self->{STATES}{$startState}; |
my $state = $self->{STATES}->{$startState}; |
|
|
# Error checking; it is intended that the developer will have |
# For debugging, print something here to determine if you're going |
# checked all paths and the user can't see this! |
# to an undefined state. |
if (!defined($state)) { |
if (!defined($state)) { |
$result .="Error! The state ". $startState ." is not defined."; |
return; |
return $result; |
|
} |
} |
$state->preprocess(); |
$state->preprocess(); |
|
|
# Phase 3: While the current state is different from the previous state, |
# Phase 3: While the current state is different from the previous state, |
# keep processing. |
# keep processing. |
while ( $startState ne $self->{STATE} ) |
while ( $startState ne $self->{STATE} && |
|
defined($self->{STATES}->{$self->{STATE}}) ) |
{ |
{ |
$startState = $self->{STATE}; |
$startState = $self->{STATE}; |
$state = $self->{STATES}{$startState}; |
$state = $self->{STATES}->{$startState}; |
$state->preprocess(); |
$state->preprocess(); |
} |
} |
|
|
|
return; |
|
} |
|
|
|
# 1: Do the post processing for the previous state. |
|
# 2: Do the preprocessing for the current state. |
|
# 3: Check to see if state changed, if so, postprocess current and move to next. |
|
# Repeat until state stays stable. |
|
# 4: Render the current state to the screen as an HTML page. |
|
sub display { |
|
my $self = shift; |
|
|
|
my $state = $self->{STATES}{$self->{STATE}}; |
|
|
|
my $result = ""; |
|
|
|
if (!defined($state)) { |
|
$result = "<font color='#ff0000'>Error: state '$state' not defined!</font>"; |
|
return $result; |
|
} |
|
|
# Phase 4: Display. |
# Phase 4: Display. |
my $stateTitle = $state->title(); |
my $stateTitle=&mt($state->title()); |
my $bodytag = &Apache::loncommon::bodytag("$self->{TITLE}",'',''); |
my $browser_searcher_js = |
|
'<script type="text/javascript">'."\n". |
|
&Apache::loncommon::browser_and_searcher_javascript(). |
|
"\n".'</script>'; |
|
|
|
$result .= &Apache::loncommon::start_page($self->{TITLE}, |
|
$browser_searcher_js); |
|
|
|
my $previous = HTML::Entities::encode(&mt("<- Previous"), '<>&"'); |
|
my $next = HTML::Entities::encode(&mt("Next ->"), '<>&"'); |
|
# FIXME: This should be parameterized, not concatenated - Jeremy |
|
|
|
|
|
if (!$state->overrideForm()) { $result.="<form name='helpform' method='POST'>"; } |
$result .= <<HEADER; |
$result .= <<HEADER; |
<html> |
<table border="0" width='100%'><tr><td> |
<head> |
|
<title>LON-CAPA Helper: $self->{TITLE}</title> |
|
</head> |
|
$bodytag |
|
HEADER |
|
if (!$state->overrideForm()) { $result.="<form name='wizform' method='GET'>"; } |
|
$result .= <<HEADER; |
|
<table border="0"><tr><td> |
|
<h2><i>$stateTitle</i></h2> |
<h2><i>$stateTitle</i></h2> |
HEADER |
HEADER |
|
|
|
$result .= "<table cellpadding='10' width='100%'><tr><td rowspan='2' valign='top'>"; |
|
|
if (!$state->overrideForm()) { |
if (!$state->overrideForm()) { |
$result .= $self->_saveVars(); |
$result .= $self->_saveVars(); |
} |
} |
$result .= $state->render() . "<p> </p>"; |
$result .= $state->render(); |
|
|
|
$result .= "</td><td valign='top' align='right'>"; |
|
|
|
# Warning: Copy and pasted from below, because it's too much trouble to |
|
# turn this into a subroutine |
if (!$state->overrideForm()) { |
if (!$state->overrideForm()) { |
$result .= '<center>'; |
|
if ($self->{STATE} ne $self->{START_STATE}) { |
if ($self->{STATE} ne $self->{START_STATE}) { |
#$result .= '<input name="SUBMIT" type="submit" value="<- Previous" /> '; |
#$result .= '<input name="SUBMIT" type="submit" value="<- Previous" /> '; |
} |
} |
if ($self->{DONE}) { |
if ($self->{DONE}) { |
my $returnPage = $self->{RETURN_PAGE}; |
my $returnPage = $self->{RETURN_PAGE}; |
$result .= "<a href=\"$returnPage\">End Helper</a>"; |
$result .= "<a href=\"$returnPage\">" . &mt("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"; |
|
} |
} |
|
|
|
$result .= "</td></tr><tr><td valign='bottom' align='right'>"; |
|
|
|
# Warning: Copy and pasted from above, because it's too much trouble to |
|
# turn this into a subroutine |
|
if (!$state->overrideForm()) { |
|
if ($self->{STATE} ne $self->{START_STATE}) { |
|
#$result .= '<input name="SUBMIT" type="submit" value="<- Previous" /> '; |
|
} |
|
if ($self->{DONE}) { |
|
my $returnPage = $self->{RETURN_PAGE}; |
|
$result .= "<a href=\"$returnPage\">" . &mt('End Helper') . "</a>"; |
|
} |
|
else { |
|
$result .= '<nobr><input name="back" type="button" '; |
|
$result .= 'value="' . $previous . '" onclick="history.go(-1)" /> '; |
|
$result .= '<input name="SUBMIT" type="submit" value="' . $next . '" /></nobr>'; |
|
} |
|
} |
|
|
|
#foreach my $key (keys %{$self->{VARS}}) { |
|
# $result .= "|$key| -> " . $self->{VARS}->{$key} . "<br />"; |
|
#} |
|
|
|
$result .= "</td></tr></table>"; |
|
|
$result .= <<FOOTER; |
$result .= <<FOOTER; |
</td> |
</td> |
</tr> |
</tr> |
</table> |
</table> |
</form> |
</form> |
</body> |
|
</html> |
|
FOOTER |
FOOTER |
|
|
|
$result .= &Apache::loncommon::end_page(); |
# Handle writing out the vars to the file |
# Handle writing out the vars to the file |
my $file = Apache::File->new('>'.$self->{FILENAME}); |
my $file = Apache::File->new('>'.$self->{FILENAME}); |
print $file $self->_varsInFile(); |
print $file $self->_varsInFile(); |
Line 433 sub new {
|
Line 686 sub new {
|
|
|
$helper->registerState($self); |
$helper->registerState($self); |
|
|
|
$state = $self; |
|
|
return $self; |
return $self; |
} |
} |
|
|
Line 453 sub preprocess {
|
Line 708 sub preprocess {
|
} |
} |
} |
} |
|
|
|
# FIXME: Document that all postprocesses must return a true value or |
|
# the state transition will be overridden |
sub postprocess { |
sub postprocess { |
my $self = shift; |
my $self = shift; |
|
|
|
# Save the state so we can roll it back if we need to. |
|
my $originalState = $helper->{STATE}; |
|
my $everythingSuccessful = 1; |
|
|
for my $element (@{$self->{ELEMENTS}}) { |
for my $element (@{$self->{ELEMENTS}}) { |
$element->postprocess(); |
my $result = $element->postprocess(); |
|
if (!$result) { $everythingSuccessful = 0; } |
|
} |
|
|
|
# If not all the postprocesses were successful, override |
|
# any state transitions that may have occurred. It is the |
|
# responsibility of the states to make sure they have |
|
# error handling in that case. |
|
if (!$everythingSuccessful) { |
|
$helper->{STATE} = $originalState; |
} |
} |
} |
} |
|
|
|
# Override the form if any element wants to. |
|
# two elements overriding the form will make a mess, but that should |
|
# be considered helper author error ;-) |
sub overrideForm { |
sub overrideForm { |
|
my $self = shift; |
|
for my $element (@{$self->{ELEMENTS}}) { |
|
if ($element->overrideForm()) { |
|
return 1; |
|
} |
|
} |
return 0; |
return 0; |
} |
} |
|
|
Line 479 sub render {
|
Line 758 sub render {
|
for my $element (@{$self->{ELEMENTS}}) { |
for my $element (@{$self->{ELEMENTS}}) { |
push @results, $element->render(); |
push @results, $element->render(); |
} |
} |
|
|
return join("\n", @results); |
return join("\n", @results); |
} |
} |
|
|
Line 489 package Apache::lonhelper::element;
|
Line 769 package Apache::lonhelper::element;
|
|
|
=pod |
=pod |
|
|
=head2 Element Base Class |
=head1 Element Base Class |
|
|
The Apache::lonhelper::element base class provides support methods for |
|
the elements to use, such as a multiple value processer. |
|
|
|
B<Methods>: |
The Apache::lonhelper::element base class provides support for elements |
|
and defines some generally useful tags for use in elements. |
|
|
=over 4 |
=head2 finalcode tagX<finalcode> |
|
|
=item * process_multiple_choices(formName, varName): Process the form |
Each element can contain a "finalcode" tag that, when the special FINAL |
element named "formName" and place the selected items into the helper |
helper state is used, will be executed, surrounded by "sub { my $helper = shift;" |
variable named varName. This is for things like checkboxes or |
and "}". It is expected to return a string describing what it did, which |
multiple-selection listboxes where the user can select more then |
may be an empty string. See course initialization helper for an example. This is |
one entry. The selected entries are delimited by triple pipes in |
generally intended for helpers like the course initialization helper, which consist |
the helper variables, like this: CHOICE_1|||CHOICE_2|||CHOICE_3 |
of several panels, each of which is performing some sort of bite-sized functionality. |
|
|
=back |
=head2 defaultvalue tagX<defaultvalue> |
|
|
|
Each element that accepts user input can contain a "defaultvalue" tag that, |
|
when surrounded by "sub { my $helper = shift; my $state = shift; " and "}", |
|
will form a subroutine that when called will provide a default value for |
|
the element. How this value is interpreted by the element is specific to |
|
the element itself, and possibly the settings the element has (such as |
|
multichoice vs. single choice for <choices> tags). |
|
|
|
This is also intended for things like the course initialization wizard, where the |
|
user is setting various parameters. By correctly grabbing current settings |
|
and including them into the helper, it allows the user to come back to the |
|
helper later and re-execute it, without needing to worry about overwriting |
|
some setting accidentally. |
|
|
|
Again, see the course initialization helper for examples. |
|
|
|
=head2 validator tagX<validator> |
|
|
|
Some elements that accepts user input can contain a "validator" tag that, |
|
when surrounded by "sub { my $helper = shift; my $state = shift; my $element = shift; my $val = shift " |
|
and "}", where "$val" is the value the user entered, will form a subroutine |
|
that when called will verify whether the given input is valid or not. If it |
|
is valid, the routine will return a false value. If invalid, the routine |
|
will return an error message to be displayed for the user. |
|
|
|
Consult the documentation for each element to see whether it supports this |
|
tag. |
|
|
|
=head2 getValue methodX<getValue (helper elements)> |
|
|
|
If the element stores the name of the variable in a 'variable' member, which |
|
the provided ones all do, you can retreive the value of the variable by calling |
|
this method. |
|
|
=cut |
=cut |
|
|
|
BEGIN { |
|
&Apache::lonhelper::register('Apache::lonhelper::element', |
|
('nextstate', 'finalcode', |
|
'defaultvalue', 'validator')); |
|
} |
|
|
# Because we use the param hash, this is often a sufficent |
# Because we use the param hash, this is often a sufficent |
# constructor |
# constructor |
sub new { |
sub new { |
Line 527 sub new {
|
Line 844 sub new {
|
return $self; |
return $self; |
} |
} |
|
|
|
sub start_nextstate { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
|
|
$paramHash->{NEXTSTATE} = &Apache::lonxml::get_all_text('/nextstate', |
|
$parser); |
|
return ''; |
|
} |
|
|
|
sub end_nextstate { return ''; } |
|
|
|
sub start_finalcode { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
|
|
$paramHash->{FINAL_CODE} = &Apache::lonxml::get_all_text('/finalcode', |
|
$parser); |
|
return ''; |
|
} |
|
|
|
sub end_finalcode { return ''; } |
|
|
|
sub start_defaultvalue { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
|
|
$paramHash->{DEFAULT_VALUE} = &Apache::lonxml::get_all_text('/defaultvalue', |
|
$parser); |
|
$paramHash->{DEFAULT_VALUE} = 'sub { my $helper = shift; my $state = shift;' . |
|
$paramHash->{DEFAULT_VALUE} . '}'; |
|
return ''; |
|
} |
|
|
|
sub end_defaultvalue { return ''; } |
|
|
|
# Validators may need to take language specifications |
|
sub start_validator { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
|
|
$paramHash->{VALIDATOR} = &Apache::lonxml::get_all_text('/validator', |
|
$parser); |
|
$paramHash->{VALIDATOR} = 'sub { my $helper = shift; my $state = shift; my $element = shift; my $val = shift;' . |
|
$paramHash->{VALIDATOR} . '}'; |
|
return ''; |
|
} |
|
|
|
sub end_validator { return ''; } |
|
|
sub preprocess { |
sub preprocess { |
return 1; |
return 1; |
} |
} |
Line 539 sub render {
|
Line 917 sub render {
|
return ''; |
return ''; |
} |
} |
|
|
sub process_multiple_choices { |
sub overrideForm { |
my $self = shift; |
return 0; |
my $formname = shift; |
} |
my $var = shift; |
|
|
|
my $formvalue = $ENV{'form.' . $formname}; |
sub getValue { |
if ($formvalue) { |
my $self = shift; |
# Must extract values from $wizard->{DATA} directly, as there |
return $helper->{VARS}->{$self->{'variable'}}; |
# may be more then one. |
|
my @values; |
|
for my $formparam (split (/&/, $wizard->{DATA})) { |
|
my ($name, $value) = split(/=/, $formparam); |
|
if ($name ne $formname) { |
|
next; |
|
} |
|
$value =~ tr/+/ /; |
|
$value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg; |
|
push @values, $value; |
|
} |
|
$helper->setVar($var, join('|||', @values)); |
|
} |
|
|
|
return; |
|
} |
} |
|
|
1; |
1; |
Line 570 package Apache::lonhelper::message;
|
Line 932 package Apache::lonhelper::message;
|
|
|
=pod |
=pod |
|
|
=head2 Element: message |
=head1 Elements |
|
|
|
=head2 Element: messageX<message, helper element> |
|
|
Message elements display the contents of their <message_text> tags, and |
Message elements display their contents, and |
transition directly to the state in the <next_state> tag. Example: |
transition directly to the state in the <nextstate> attribute. Example: |
|
|
<message> |
<message nextstate='GET_NAME'> |
<next_state>GET_NAME</next_state> |
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> |
|
</message> |
</message> |
|
|
This will display the HTML message and transition to the <next_state> if |
This will display the HTML message and transition to the 'nextstate' if |
given. The HTML will be directly inserted into the wizard, 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. |
|
|
|
Message tags do not add in whitespace, so if you want it, you'll need to add |
|
it into states. This is done so you can inline some elements, such as |
|
the <date> element, right between two messages, giving the appearence that |
|
the <date> element appears inline. (Note the elements can not be embedded |
|
within each other.) |
|
|
This is also a good template for creating your own new states, as it has |
This is also a good template for creating your own new states, as it has |
very little code beyond the state template. |
very little code beyond the state template. |
|
|
|
=head3 Localization |
|
|
|
The contents of the message tag will be run through the |
|
normalize_string function and that will be used as a call to &mt. |
|
|
=cut |
=cut |
|
|
no strict; |
no strict; |
@ISA = ("Apache::lonhelper::element"); |
@ISA = ("Apache::lonhelper::element"); |
use strict; |
use strict; |
|
use Apache::lonlocal; |
|
|
BEGIN { |
BEGIN { |
&Apache::lonxml::register('Apache::lonhelper::message', |
&Apache::lonhelper::register('Apache::lonhelper::message', |
('message', 'next_state', 'message_text')); |
('message')); |
} |
} |
|
|
# Don't need to override the "new" from element |
sub new { |
|
my $ref = Apache::lonhelper::element->new(); |
|
bless($ref); |
|
} |
|
|
# CONSTRUCTION: Construct the message element from the XML |
# CONSTRUCTION: Construct the message element from the XML |
sub start_message { |
sub start_message { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
|
|
$paramHash->{MESSAGE_TEXT} = &mtn(&Apache::lonxml::get_all_text('/message', |
|
$parser)); |
|
|
|
if (defined($token->[2]{'nextstate'})) { |
|
$paramHash->{NEXTSTATE} = $token->[2]{'nextstate'}; |
|
} |
return ''; |
return ''; |
} |
} |
|
|
Line 617 sub end_message {
|
Line 1007 sub end_message {
|
return ''; |
return ''; |
} |
} |
|
|
sub start_next_state { |
sub render { |
|
my $self = shift; |
|
|
|
return &mtn($self->{MESSAGE_TEXT}); |
|
} |
|
# If a NEXTSTATE was given, switch to it |
|
sub postprocess { |
|
my $self = shift; |
|
if (defined($self->{NEXTSTATE})) { |
|
$helper->changeState($self->{NEXTSTATE}); |
|
} |
|
|
|
return 1; |
|
} |
|
1; |
|
|
|
package Apache::lonhelper::skip; |
|
|
|
=pod |
|
|
|
=head1 Elements |
|
|
|
=head2 Element: skipX<skip> |
|
|
|
The <skip> tag allows you define conditions under which the current state |
|
should be skipped over and define what state to skip to. |
|
|
|
<state name="SKIP"> |
|
<skip> |
|
<clause> |
|
#some code that decides whether to skip the state or not |
|
</clause> |
|
<nextstate>FINISH</nextstate> |
|
</skip> |
|
<message nextstate="FINISH">A possibly skipped state</message> |
|
</state> |
|
|
|
=cut |
|
|
|
no strict; |
|
@ISA = ("Apache::lonhelper::element"); |
|
use strict; |
|
|
|
BEGIN { |
|
&Apache::lonhelper::register('Apache::lonhelper::skip', |
|
('skip')); |
|
} |
|
|
|
sub new { |
|
my $ref = Apache::lonhelper::element->new(); |
|
bless($ref); |
|
} |
|
|
|
sub start_skip { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
# let <cluase> know what text to skip to |
|
$paramHash->{SKIPTAG}='/skip'; |
|
return ''; |
|
} |
|
|
|
sub end_skip { |
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
if ($target ne 'helper') { |
if ($target ne 'helper') { |
return ''; |
return ''; |
} |
} |
|
Apache::lonhelper::skip->new(); |
|
return ''; |
|
} |
|
|
|
sub render { |
|
my $self = shift; |
|
return ''; |
|
} |
|
# If a NEXTSTATE is set, switch to it |
|
sub preprocess { |
|
my ($self) = @_; |
|
|
|
if (defined($self->{NEXTSTATE})) { |
|
$helper->changeState($self->{NEXTSTATE}); |
|
} |
|
|
|
return 1; |
|
} |
|
|
|
1; |
|
|
|
package Apache::lonhelper::choices; |
|
|
|
=pod |
|
|
|
=head2 Element: choicesX<choices, helper element> |
|
|
|
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 |
|
(the "human" value), and one which will be passed back to the program |
|
(the "computer" value). For instance, a human may choose from a list of |
|
resources on disk by title, while your program wants the file name. |
|
|
|
<choices> takes an attribute "variable" to control which helper variable |
|
the result is stored in. |
|
|
|
<choices> takes an attribute "multichoice" which, if set to a true |
|
value, will allow the user to select multiple choices. |
|
|
|
<choices> takes an attribute "allowempty" which, if set to a true |
|
value, will allow the user to select none of the choices without raising |
|
an error message. |
|
|
|
=head3 SUB-TAGS |
|
|
|
<choices> can have the following subtags:X<choice, helper tag> |
|
|
|
=over 4 |
|
|
|
=item * <nextstate>state_name</nextstate>: If given, this will cause the |
|
choice element to transition to the given state after executing. |
|
This will override the <nextstate> passed to <choices> (if any). |
|
|
|
=item * <choice />: If the choices are static, |
|
this element will allow you to specify them. Each choice |
|
contains attribute, "computer", as described above. The |
|
content of the tag will be used as the human label. |
|
For example, |
|
<choice computer='234-12-7312'>Bobby McDormik</choice>. |
|
|
|
<choice> can take a parameter "eval", which if set to |
|
a true value, will cause the contents of the tag to be |
|
evaluated as it would be in an <eval> tag; see <eval> tag |
|
below. |
|
|
|
<choice> may optionally contain a 'nextstate' attribute, which |
|
will be the state transistioned to if the choice is made, if |
|
the choice is not multichoice. This will override the nextstate |
|
passed to the parent C<choices> tag. |
|
|
|
<choice> may optionally contain a 'relatedvalue' attribute, which |
|
if present will cause a text entry to appear to the right of the |
|
selection. The value of the relatedvalue attribute is a variable |
|
into which the text entry will be stored e.g.: |
|
<choice computer='numberprovided" relatedvalue="num">Type the number in:</choice> |
|
|
|
<choice> may contain a relatededefault atribute which, if the |
|
relatedvalue attribute is present will be the initial value of the input |
|
box. |
|
|
|
=back |
|
|
|
To create the choices programmatically, either wrap the choices in |
|
<condition> tags (prefered), or use an <exec> block inside the <choice> |
|
tag. Store the choices in $state->{CHOICES}, which is a list of list |
|
references, where each list has three strings. The first is the human |
|
name, the second is the computer name. and the third is the option |
|
next state. For example: |
|
|
|
<exec> |
|
for (my $i = 65; $i < 65 + 26; $i++) { |
|
push @{$state->{CHOICES}}, [chr($i), $i, 'next']; |
|
} |
|
</exec> |
|
|
|
This will allow the user to select from the letters A-Z (in ASCII), while |
|
passing the ASCII value back into the helper variables, and the state |
|
will in all cases transition to 'next'. |
|
|
|
You can mix and match methods of creating choices, as long as you always |
|
"push" onto the choice list, rather then wiping it out. (You can even |
|
remove choices programmatically, but that would probably be bad form.) |
|
|
|
=head3 defaultvalue support |
|
|
|
Choices supports default values both in multichoice and single choice mode. |
|
In single choice mode, have the defaultvalue tag's function return the |
|
computer value of the box you want checked. If the function returns a value |
|
that does not correspond to any of the choices, the default behavior of selecting |
|
the first choice will be preserved. |
|
|
|
For multichoice, return a string with the computer values you want checked, |
|
delimited by triple pipes. Note this matches how the result of the <choices> |
|
tag is stored in the {VARS} hash. |
|
|
|
=cut |
|
|
|
no strict; |
|
@ISA = ("Apache::lonhelper::element"); |
|
use strict; |
|
use Apache::lonlocal; |
|
use Apache::lonnet; |
|
|
|
BEGIN { |
|
&Apache::lonhelper::register('Apache::lonhelper::choices', |
|
('choice', 'choices')); |
|
} |
|
|
|
sub new { |
|
my $ref = Apache::lonhelper::element->new(); |
|
bless($ref); |
|
} |
|
|
|
# CONSTRUCTION: Construct the message element from the XML |
|
sub start_choices { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
|
|
# Need to initialize the choices list, so everything can assume it exists |
|
$paramHash->{'variable'} = $token->[2]{'variable'} if (!defined($paramHash->{'variable'})); |
|
$helper->declareVar($paramHash->{'variable'}); |
|
$paramHash->{'multichoice'} = $token->[2]{'multichoice'}; |
|
$paramHash->{'allowempty'} = $token->[2]{'allowempty'}; |
|
$paramHash->{CHOICES} = []; |
|
return ''; |
|
} |
|
|
|
sub end_choices { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
Apache::lonhelper::choices->new(); |
|
return ''; |
|
} |
|
|
|
sub start_choice { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
|
|
my $computer = $token->[2]{'computer'}; |
|
my $human = &mt(&Apache::lonxml::get_all_text('/choice', |
|
$parser)); |
|
my $nextstate = $token->[2]{'nextstate'}; |
|
my $evalFlag = $token->[2]{'eval'}; |
|
my $relatedVar = $token->[2]{'relatedvalue'}; |
|
my $relatedDefault = $token->[2]{'relateddefault'}; |
|
push @{$paramHash->{CHOICES}}, [&mtn($human), $computer, $nextstate, |
|
$evalFlag, $relatedVar, $relatedDefault]; |
|
return ''; |
|
} |
|
|
|
sub end_choice { |
|
return ''; |
|
} |
|
|
|
{ |
|
# used to generate unique id attributes for <input> tags. |
|
# internal use only. |
|
my $id = 0; |
|
sub new_id { return $id++; } |
|
} |
|
|
|
sub render { |
|
my $self = shift; |
|
my $var = $self->{'variable'}; |
|
my $buttons = ''; |
|
my $result = ''; |
|
|
|
if ($self->{'multichoice'}) { |
|
$result .= <<SCRIPT; |
|
<script type="text/javascript"> |
|
// <!-- |
|
function checkall(value, checkName) { |
|
for (i=0; i<document.forms.helpform.elements.length; i++) { |
|
ele = document.forms.helpform.elements[i]; |
|
if (ele.name == checkName + '.forminput') { |
|
document.forms.helpform.elements[i].checked=value; |
|
} |
|
} |
|
} |
|
// --> |
|
</script> |
|
SCRIPT |
|
} |
|
|
|
# Only print "select all" and "unselect all" if there are five or |
|
# more choices; fewer then that and it looks silly. |
|
if ($self->{'multichoice'} && scalar(@{$self->{CHOICES}}) > 4) { |
|
my %lt=&Apache::lonlocal::texthash( |
|
'sa' => "Select All", |
|
'ua' => "Unselect All"); |
|
$buttons = <<BUTTONS; |
|
<br /> |
|
<input type="button" onclick="checkall(true, '$var')" value="$lt{'sa'}" /> |
|
<input type="button" onclick="checkall(false, '$var')" value="$lt{'ua'}" /> |
|
<br /> |
|
BUTTONS |
|
} |
|
|
|
if (defined $self->{ERROR_MSG}) { |
|
$result .= '<br /><font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br />'; |
|
} |
|
|
|
$result .= $buttons; |
|
|
$paramHash->{NEXT_STATE} = &Apache::lonxml::get_all_text('/next_state', |
$result .= "<table>\n\n"; |
$parser); |
|
|
my %checkedChoices; |
|
my $checkedChoicesFunc; |
|
|
|
if (defined($self->{DEFAULT_VALUE})) { |
|
$checkedChoicesFunc = eval ($self->{DEFAULT_VALUE}); |
|
die 'Error in default value code for variable ' . |
|
$self->{'variable'} . ', Perl said: ' . $@ if $@; |
|
} else { |
|
$checkedChoicesFunc = sub { return ''; }; |
|
} |
|
|
|
# Process which choices should be checked. |
|
if ($self->{'multichoice'}) { |
|
for my $selectedChoice (split(/\|\|\|/, (&$checkedChoicesFunc($helper, $self)))) { |
|
$checkedChoices{$selectedChoice} = 1; |
|
} |
|
} else { |
|
# 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; |
|
} |
|
} |
|
|
|
my $type = "radio"; |
|
if ($self->{'multichoice'}) { $type = 'checkbox'; } |
|
foreach my $choice (@{$self->{CHOICES}}) { |
|
my $id = &new_id(); |
|
$result .= "<tr>\n<td width='20'> </td>\n"; |
|
$result .= "<td valign='top'><input type='$type' name='$var.forminput'" |
|
. " value='" . |
|
HTML::Entities::encode($choice->[1],"<>&\"'") |
|
. "'"; |
|
if ($checkedChoices{$choice->[1]}) { |
|
$result .= " checked='checked' "; |
|
} |
|
$result .= qq{id="id$id"}; |
|
my $choiceLabel = $choice->[0]; |
|
if ($choice->[3]) { # if we need to evaluate this choice |
|
$choiceLabel = "sub { my $helper = shift; my $state = shift;" . |
|
$choiceLabel . "}"; |
|
$choiceLabel = eval($choiceLabel); |
|
$choiceLabel = &$choiceLabel($helper, $self); |
|
} |
|
$result .= "/></td><td> ".qq{<label for="id$id">}. |
|
$choiceLabel. "</label></td>"; |
|
if ($choice->[4]) { |
|
$result .='<td><input type="text" size="5" name="' |
|
.$choice->[4].'.forminput" value="' |
|
.$choice->[5].'" /></td>'; |
|
} |
|
$result .= "</tr>\n"; |
|
} |
|
$result .= "</table>\n\n\n"; |
|
$result .= $buttons; |
|
|
|
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'}) { |
|
$self->{ERROR_MSG} = |
|
&mt("You must choose one or more choices to continue."); |
|
return 0; |
|
} |
|
|
|
if (ref($chosenValue)) { |
|
$helper->{VARS}->{$self->{'variable'}} = join('|||', @$chosenValue); |
|
} |
|
|
|
if (defined($self->{NEXTSTATE})) { |
|
$helper->changeState($self->{NEXTSTATE}); |
|
} |
|
|
|
foreach my $choice (@{$self->{CHOICES}}) { |
|
if ($choice->[1] eq $chosenValue) { |
|
if (defined($choice->[2])) { |
|
$helper->changeState($choice->[2]); |
|
} |
|
} |
|
if ($choice->[4]) { |
|
my $varname = $choice->[4]; |
|
$helper->{'VARS'}->{$varname} = $env{'form.'."$varname.forminput"}; |
|
} |
|
} |
|
return 1; |
|
} |
|
1; |
|
|
|
package Apache::lonhelper::dropdown; |
|
|
|
=pod |
|
|
|
=head2 Element: dropdownX<dropdown, helper tag> |
|
|
|
A drop-down provides a drop-down box instead of a radio button |
|
box. Because most people do not know how to use a multi-select |
|
drop-down box, that option is not allowed. Otherwise, the arguments |
|
are the same as "choices", except "allowempty" is also meaningless. |
|
|
|
<dropdown> takes an attribute "variable" to control which helper variable |
|
the result is stored in. |
|
|
|
=head3 SUB-TAGS |
|
|
|
<choice>, which acts just as it does in the "choices" element. |
|
|
|
=cut |
|
|
|
# This really ought to be a sibling class to "choice" which is itself |
|
# a child of some abstract class.... *shrug* |
|
|
|
no strict; |
|
@ISA = ("Apache::lonhelper::element"); |
|
use strict; |
|
use Apache::lonlocal; |
|
use Apache::lonnet; |
|
|
|
BEGIN { |
|
&Apache::lonhelper::register('Apache::lonhelper::dropdown', |
|
('dropdown')); |
|
} |
|
|
|
sub new { |
|
my $ref = Apache::lonhelper::element->new(); |
|
bless($ref); |
|
} |
|
|
|
# CONSTRUCTION: Construct the message element from the XML |
|
sub start_dropdown { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
|
|
# Need to initialize the choices list, so everything can assume it exists |
|
$paramHash->{'variable'} = $token->[2]{'variable'} if (!defined($paramHash->{'variable'})); |
|
$helper->declareVar($paramHash->{'variable'}); |
|
$paramHash->{CHOICES} = []; |
|
return ''; |
|
} |
|
|
|
sub end_dropdown { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
Apache::lonhelper::dropdown->new(); |
return ''; |
return ''; |
} |
} |
|
|
sub end_next_state { return ''; } |
sub render { |
|
my $self = shift; |
|
my $var = $self->{'variable'}; |
|
my $result = ''; |
|
|
|
if (defined $self->{ERROR_MSG}) { |
|
$result .= '<br /><font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br />'; |
|
} |
|
|
|
my %checkedChoices; |
|
my $checkedChoicesFunc; |
|
|
|
if (defined($self->{DEFAULT_VALUE})) { |
|
$checkedChoicesFunc = eval ($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='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); |
|
} |
|
$result .= ">" . &mtn($choiceLabel) . "</option>\n"; |
|
} |
|
$result .= "</select>\n"; |
|
|
sub start_message_text { |
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; |
|
|
|
=pod |
|
|
|
=head2 Element: dateX<date, helper element> |
|
|
|
Date elements allow the selection of a date with a drop down list. |
|
|
|
Date elements can take two attributes: |
|
|
|
=over 4 |
|
|
|
=item * B<variable>: The name of the variable to store the chosen |
|
date in. Required. |
|
|
|
=item * B<hoursminutes>: If a true value, the date will show hours |
|
and minutes, as well as month/day/year. If false or missing, |
|
the date will only show the month, day, and year. |
|
|
|
=back |
|
|
|
Date elements contain only an option <nextstate> tag to determine |
|
the next state. |
|
|
|
Example: |
|
|
|
<date variable="DUE_DATE" hoursminutes="1"> |
|
<nextstate>choose_why</nextstate> |
|
</date> |
|
|
|
=cut |
|
|
|
no strict; |
|
@ISA = ("Apache::lonhelper::element"); |
|
use strict; |
|
use Apache::lonlocal; # A localization nightmare |
|
use Apache::lonnet; |
|
use Time::localtime; |
|
|
|
BEGIN { |
|
&Apache::lonhelper::register('Apache::lonhelper::date', |
|
('date')); |
|
} |
|
|
|
# Don't need to override the "new" from element |
|
sub new { |
|
my $ref = Apache::lonhelper::element->new(); |
|
bless($ref); |
|
} |
|
|
|
my @months = ("January", "February", "March", "April", "May", "June", "July", |
|
"August", "September", "October", "November", "December"); |
|
|
|
# CONSTRUCTION: Construct the message element from the XML |
|
sub start_date { |
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
if ($target ne 'helper') { |
if ($target ne 'helper') { |
return ''; |
return ''; |
} |
} |
|
|
$paramHash->{MESSAGE_TEXT} = &Apache::lonxml::get_all_text('/message_text', |
$paramHash->{'variable'} = $token->[2]{'variable'}; |
$parser); |
$helper->declareVar($paramHash->{'variable'}); |
|
$paramHash->{'hoursminutes'} = $token->[2]{'hoursminutes'}; |
|
$paramHash->{'anytime'} = $token->[2]{'anytime'}; |
} |
} |
|
|
|
sub end_date { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
Apache::lonhelper::date->new(); |
|
return ''; |
|
} |
|
|
|
sub render { |
|
my $self = shift; |
|
my $result = ""; |
|
my $var = $self->{'variable'}; |
|
|
|
my $date; |
|
|
|
my $time=time; |
|
my ($anytime,$onclick); |
|
|
|
|
|
# first check VARS for a valid new value from the user |
|
# then check DEFAULT_VALUE for a valid default time value |
|
# otherwise pick now as reasonably good time |
|
|
|
if (defined($helper->{VARS}{$var}) |
|
&& $helper->{VARS}{$var} > 0) { |
|
$date = localtime($helper->{VARS}{$var}); |
|
} elsif (defined($self->{DEFAULT_VALUE})) { |
|
my $valueFunc = eval($self->{DEFAULT_VALUE}); |
|
die('Error in default value code for variable ' . |
|
$self->{'variable'} . ', Perl said: ' . $@) if $@; |
|
$time = &$valueFunc($helper, $self); |
|
if (lc($time) eq 'anytime') { |
|
$anytime=1; |
|
$date = localtime(time); |
|
$date->min(0); |
|
} elsif (defined($time) && $time ne 0) { |
|
$date = localtime($time); |
|
} else { |
|
# leave date undefined so it'll default to now |
|
} |
|
} |
|
|
|
if (!defined($date)) { |
|
$date = localtime(time); |
|
$date->min(0); |
|
} |
|
|
|
if ($anytime) { |
|
$onclick = "onclick=\"javascript:updateCheck(this.form,'${var}anytime',false)\""; |
|
} |
|
# Default date: The current hour. |
|
|
|
if (defined $self->{ERROR_MSG}) { |
|
$result .= '<font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br /><br />'; |
|
} |
|
|
|
# Month |
|
my $i; |
|
$result .= "<select $onclick name='${var}month'>\n"; |
|
for ($i = 0; $i < 12; $i++) { |
|
if ($i == $date->mon) { |
|
$result .= "<option value='$i' selected='selected'>"; |
|
} else { |
|
$result .= "<option value='$i'>"; |
|
} |
|
$result .= &mt($months[$i]) . "</option>\n"; |
|
} |
|
$result .= "</select>\n"; |
|
|
|
# Day |
|
$result .= "<select $onclick name='${var}day'>\n"; |
|
for ($i = 1; $i < 32; $i++) { |
|
if ($i == $date->mday) { |
|
$result .= '<option selected="selected">'; |
|
} else { |
|
$result .= '<option>'; |
|
} |
|
$result .= "$i</option>\n"; |
|
} |
|
$result .= "</select>,\n"; |
|
|
|
# Year |
|
$result .= "<select $onclick name='${var}year'>\n"; |
|
for ($i = 2000; $i < 2030; $i++) { # update this after 64-bit dates |
|
if ($date->year + 1900 == $i) { |
|
$result .= "<option selected='selected'>"; |
|
} else { |
|
$result .= "<option>"; |
|
} |
|
$result .= "$i</option>\n"; |
|
} |
|
$result .= "</select>,\n"; |
|
|
|
# Display Hours and Minutes if they are called for |
|
if ($self->{'hoursminutes'}) { |
|
# This needs parameterization for times. |
|
my $am = &mt('a.m.'); |
|
my $pm = &mt('p.m.'); |
|
# Build hour |
|
$result .= "<select $onclick name='${var}hour'>\n"; |
|
$result .= "<option " . ($date->hour == 0 ? 'selected="selected" ':'') . |
|
" value='0'>" . &mt('midnight') . "</option>\n"; |
|
for ($i = 1; $i < 12; $i++) { |
|
if ($date->hour == $i) { |
|
$result .= "<option selected='selected' value='$i'>$i $am</option>\n"; |
|
} else { |
|
$result .= "<option value='$i'>$i $am</option>\n"; |
|
} |
|
} |
|
$result .= "<option " . ($date->hour == 12 ? 'selected="selected" ':'') . |
|
" value='12'>" . &mt('noon') . "</option>\n"; |
|
for ($i = 13; $i < 24; $i++) { |
|
my $printedHour = $i - 12; |
|
if ($date->hour == $i) { |
|
$result .= "<option selected='selected' value='$i'>$printedHour $pm</option>\n"; |
|
} else { |
|
$result .= "<option value='$i'>$printedHour $pm</option>\n"; |
|
} |
|
} |
|
|
|
$result .= "</select> :\n"; |
|
|
|
$result .= "<select $onclick name='${var}minute'>\n"; |
|
my $selected=0; |
|
for my $i ((0,15,30,45,59,undef,0..59)) { |
|
my $printedMinute = $i; |
|
if (defined($i) && $i < 10) { |
|
$printedMinute = "0" . $printedMinute; |
|
} |
|
if (!$selected && $date->min == $i) { |
|
$result .= "<option selected='selected'>"; |
|
$selected=1; |
|
} else { |
|
$result .= "<option>"; |
|
} |
|
$result .= "$printedMinute</option>\n"; |
|
} |
|
$result .= "</select>\n"; |
|
} |
|
if ($self->{'anytime'}) { |
|
$result.=(<<CHECK); |
|
<script type="text/javascript"> |
|
// <!-- |
|
function updateCheck(form,name,value) { |
|
var checkbox=form[name]; |
|
checkbox.checked = value; |
|
} |
|
// --> |
|
</script> |
|
CHECK |
|
$result.=" or <label><input type='checkbox' "; |
|
if ($anytime) { |
|
$result.=' checked="checked" ' |
|
} |
|
$result.="name='${var}anytime'/>".&mt('Any time').'</label>' |
|
} |
|
return $result; |
|
|
|
} |
|
# If a NEXTSTATE was given, switch to it |
|
sub postprocess { |
|
my $self = shift; |
|
my $var = $self->{'variable'}; |
|
if ($env{'form.' . $var . 'anytime'}) { |
|
$helper->{VARS}->{$var} = undef; |
|
} else { |
|
my $month = $env{'form.' . $var . 'month'}; |
|
my $day = $env{'form.' . $var . 'day'}; |
|
my $year = $env{'form.' . $var . 'year'}; |
|
my $min = 0; |
|
my $hour = 0; |
|
if ($self->{'hoursminutes'}) { |
|
$min = $env{'form.' . $var . 'minute'}; |
|
$hour = $env{'form.' . $var . 'hour'}; |
|
} |
|
|
|
my $chosenDate; |
|
eval {$chosenDate = Time::Local::timelocal(0, $min, $hour, $day, $month, $year);}; |
|
my $error = $@; |
|
|
|
# Check to make sure that the date was not automatically co-erced into a |
|
# valid date, as we want to flag that as an error |
|
# This happens for "Feb. 31", for instance, which is coerced to March 2 or |
|
# 3, depending on if it's a leap year |
|
my $checkDate = localtime($chosenDate); |
|
|
|
if ($error || $checkDate->mon != $month || $checkDate->mday != $day || |
|
$checkDate->year + 1900 != $year) { |
|
unless (Apache::lonlocal::current_language()== ~/^en/) { |
|
$self->{ERROR_MSG} = &mt("Invalid date entry"); |
|
return 0; |
|
} |
|
# LOCALIZATION FIXME: Needs to be parameterized |
|
$self->{ERROR_MSG} = "Can't use " . $months[$month] . " $day, $year as a " |
|
. "date because it doesn't exist. Please enter a valid date."; |
|
|
|
return 0; |
|
} |
|
$helper->{VARS}->{$var} = $chosenDate; |
|
} |
|
|
|
if (defined($self->{VALIDATOR})) { |
|
my $validator = eval($self->{VALIDATOR}); |
|
die 'Died during evaluation of validator 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::resource; |
|
|
|
=pod |
|
|
|
=head2 Element: resourceX<resource, helper element> |
|
|
|
<resource> elements allow the user to select one or multiple resources |
|
from the current course. You can filter out which resources they can view, |
|
and filter out which resources they can select. The course will always |
|
be displayed fully expanded, because of the difficulty of maintaining |
|
selections across folder openings and closings. If this is fixed, then |
|
the user can manipulate the folders. |
|
|
|
<resource> takes the standard variable attribute to control what helper |
|
variable stores the results. It also takes a "multichoice"X<multichoice> attribute, |
|
which controls whether the user can select more then one resource. The |
|
"toponly" attribute controls whether the resource display shows just the |
|
resources in that sequence, or recurses into all sub-sequences, defaulting |
|
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. The 'addparts' |
|
attribute will add in a part selector beside problems that have more |
|
than 1 part. |
|
|
|
=head3 SUB-TAGS |
|
|
|
=over 4 |
|
|
|
=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 |
|
Perl code that when wrapped with "sub { my $res = shift; " and "}" is |
|
a function that returns true if the resource should be displayed, |
|
and false if it should be skipped. $res is a resource object. |
|
(See Apache::lonnavmaps documentation for information about the |
|
resource object.) |
|
|
|
=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 |
|
show the user the folders, for instance, but you do not always want to |
|
let the user select them.) |
|
|
|
=item * <nextstate>: Standard nextstate behavior. |
|
|
|
=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 |
|
a function fragment that when wrapped by "sub { my $res = shift; " and |
|
"}" returns a string representing what you want to have as the value. By |
|
default, the value will be the resource ID of the object ($res->{ID}). |
|
|
|
=item * <mapurl>X<mapurl>: If the URL of a map is given here, only that map |
|
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 |
|
|
|
=cut |
|
|
|
no strict; |
|
@ISA = ("Apache::lonhelper::element"); |
|
use strict; |
|
use Apache::lonnet; |
|
|
|
BEGIN { |
|
&Apache::lonhelper::register('Apache::lonhelper::resource', |
|
('resource', 'filterfunc', |
|
'choicefunc', 'valuefunc', |
|
'mapurl','option')); |
|
} |
|
|
|
sub new { |
|
my $ref = Apache::lonhelper::element->new(); |
|
bless($ref); |
|
} |
|
|
|
# CONSTRUCTION: Construct the message element from the XML |
|
sub start_resource { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
|
|
$paramHash->{'variable'} = $token->[2]{'variable'}; |
|
$helper->declareVar($paramHash->{'variable'}); |
|
$paramHash->{'multichoice'} = $token->[2]{'multichoice'}; |
|
$paramHash->{'suppressEmptySequences'} = $token->[2]{'suppressEmptySequences'}; |
|
$paramHash->{'toponly'} = $token->[2]{'toponly'}; |
|
$paramHash->{'addstatus'} = $token->[2]{'addstatus'}; |
|
$paramHash->{'addparts'} = $token->[2]{'addparts'}; |
|
if ($paramHash->{'addparts'}) { |
|
$helper->declareVar($paramHash->{'variable'}.'_part'); |
|
} |
|
$paramHash->{'closeallpages'} = $token->[2]{'closeallpages'}; |
|
return ''; |
|
} |
|
|
|
sub end_resource { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
if (!defined($paramHash->{FILTER_FUNC})) { |
|
$paramHash->{FILTER_FUNC} = sub {return 1;}; |
|
} |
|
if (!defined($paramHash->{CHOICE_FUNC})) { |
|
$paramHash->{CHOICE_FUNC} = sub {return 1;}; |
|
} |
|
if (!defined($paramHash->{VALUE_FUNC})) { |
|
$paramHash->{VALUE_FUNC} = sub {my $res = shift; return $res->{ID}; }; |
|
} |
|
Apache::lonhelper::resource->new(); |
|
return ''; |
|
} |
|
|
|
sub start_filterfunc { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
|
|
my $contents = Apache::lonxml::get_all_text('/filterfunc', |
|
$parser); |
|
$contents = 'sub { my $res = shift; ' . $contents . '}'; |
|
$paramHash->{FILTER_FUNC} = eval $contents; |
|
} |
|
|
|
sub end_filterfunc { return ''; } |
|
|
|
sub start_choicefunc { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
|
|
my $contents = Apache::lonxml::get_all_text('/choicefunc', |
|
$parser); |
|
$contents = 'sub { my $res = shift; ' . $contents . '}'; |
|
$paramHash->{CHOICE_FUNC} = eval $contents; |
|
} |
|
|
|
sub end_choicefunc { return ''; } |
|
|
|
sub start_valuefunc { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
|
|
my $contents = Apache::lonxml::get_all_text('/valuefunc', |
|
$parser); |
|
$contents = 'sub { my $res = shift; ' . $contents . '}'; |
|
$paramHash->{VALUE_FUNC} = eval $contents; |
|
} |
|
|
|
sub end_valuefunc { return ''; } |
|
|
|
sub start_mapurl { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
|
|
my $contents = Apache::lonxml::get_all_text('/mapurl', |
|
$parser); |
|
$paramHash->{EVAL_MAP_URL} = $token->[2]{'evaluate'}; |
|
$paramHash->{MAP_URL} = $contents; |
|
} |
|
|
|
sub end_mapurl { return ''; } |
|
|
|
|
|
sub start_option { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
if (!defined($paramHash->{OPTION_TEXTS})) { |
|
$paramHash->{OPTION_TEXTS} = [ ]; |
|
$paramHash->{OPTION_VARS} = [ ]; |
|
|
|
} |
|
# OPTION_TEXTS is a list of the text attribute |
|
# values used to create column headings. |
|
# OPTION_VARS is a list of the variable names, used to create the checkbox |
|
# inputs. |
|
# We're ok with empty elements. as place holders |
|
# Although the 'variable' element should really exist. |
|
# |
|
|
|
my $option_texts = $paramHash->{OPTION_TEXTS}; |
|
my $option_vars = $paramHash->{OPTION_VARS}; |
|
push(@$option_texts, $token->[2]{'text'}); |
|
push(@$option_vars, $token->[2]{'variable'}); |
|
|
|
# Need to create and declare the option variables as well to make them |
|
# persistent. |
|
# |
|
my $varname = $token->[2]{'variable'}; |
|
$helper->declareVar($varname); |
|
|
|
|
|
return ''; |
|
} |
|
|
|
sub end_option { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
return ''; |
|
} |
|
|
|
# A note, in case I don't get to this before I leave. |
|
# If someone complains about the "Back" button returning them |
|
# to the previous folder state, instead of returning them to |
|
# the previous helper state, the *correct* answer is for the helper |
|
# to keep track of how many times the user has manipulated the folders, |
|
# and feed that to the history.go() call in the helper rendering routines. |
|
# If done correctly, the helper itself can keep track of how many times |
|
# it renders the same states, so it doesn't go in just this state, and |
|
# you can lean on the browser back button to make sure it all chains |
|
# correctly. |
|
# Right now, though, I'm just forcing all folders open. |
|
|
|
sub render { |
|
my $self = shift; |
|
my $result = ""; |
|
my $var = $self->{'variable'}; |
|
my $curVal = $helper->{VARS}->{$var}; |
|
|
|
my $buttons = ''; |
|
|
|
if ($self->{'multichoice'}) { |
|
$result = <<SCRIPT; |
|
<script type="text/javascript"> |
|
// <!-- |
|
function checkall(value, checkName) { |
|
for (i=0; i<document.forms.helpform.elements.length; i++) { |
|
ele = document.forms.helpform.elements[i]; |
|
if (ele.name == checkName + '.forminput') { |
|
document.forms.helpform.elements[i].checked=value; |
|
} |
|
} |
|
} |
|
// --> |
|
</script> |
|
SCRIPT |
|
my %lt=&Apache::lonlocal::texthash( |
|
'sar' => "Select All Resources", |
|
'uar' => "Unselect All Resources"); |
|
|
|
$buttons = <<BUTTONS; |
|
<br /> |
|
<input type="button" onclick="checkall(true, '$var')" value="$lt{'sar'}" /> |
|
<input type="button" onclick="checkall(false, '$var')" value="$lt{'uar'}" /> |
|
<br /> |
|
BUTTONS |
|
} |
|
|
|
if (defined $self->{ERROR_MSG}) { |
|
$result .= '<br /><font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br /><br />'; |
|
} |
|
|
|
$result .= $buttons; |
|
|
|
my $filterFunc = $self->{FILTER_FUNC}; |
|
my $choiceFunc = $self->{CHOICE_FUNC}; |
|
my $valueFunc = $self->{VALUE_FUNC}; |
|
my $multichoice = $self->{'multichoice'}; |
|
my $option_vars = $self->{OPTION_VARS}; |
|
my $option_texts = $self->{OPTION_TEXTS}; |
|
my $addparts = $self->{'addparts'}; |
|
my $headings_done = 0; |
|
|
|
# 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 = $self->{MAP_URL}; |
|
} |
|
|
|
my %defaultSymbs; |
|
if (defined($self->{DEFAULT_VALUE})) { |
|
my $valueFunc = eval($self->{DEFAULT_VALUE}); |
|
die 'Error in default value code for variable ' . |
|
$self->{'variable'} . ', Perl said: ' . $@ if $@; |
|
my @defaultSymbs = &$valueFunc($helper, $self); |
|
if (!$multichoice && @defaultSymbs) { # only allowed 1 |
|
@defaultSymbs = ($defaultSymbs[0]); |
|
} |
|
%defaultSymbs = map { if ($_) {($_,1) } } @defaultSymbs; |
|
delete($defaultSymbs{''}); |
|
} |
|
|
|
# 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 |
|
# - Jeremy (Pythonista) ;-) |
|
my $checked = 0; |
|
my $renderColFunc = sub { |
|
my ($resource, $part, $params) = @_; |
|
my $result = ""; |
|
|
|
if(!$headings_done) { |
|
if ($option_texts) { |
|
foreach my $text (@$option_texts) { |
|
$result .= "<th>$text</th>"; |
|
} |
|
} |
|
$result .= "<th>Select</th>"; |
|
$result .= "</tr><tr>"; # Close off the extra row and start a new one. |
|
$headings_done = 1; |
|
} |
|
|
|
my $inputType; |
|
if ($multichoice) { $inputType = 'checkbox'; } |
|
else {$inputType = 'radio'; } |
|
|
|
if (!&$choiceFunc($resource)) { |
|
$result .= '<td> </td>'; |
|
return $result; |
|
} else { |
|
my $col = ""; |
|
my $raw_name = &$valueFunc($resource); |
|
my $resource_name = |
|
HTML::Entities::encode($raw_name,"<>&\"'"); |
|
if($option_vars) { |
|
foreach my $option_var (@$option_vars) { |
|
my $var_value = "\|\|\|" . $helper->{VARS}->{$option_var} . |
|
"\|\|\|"; |
|
my $checked =""; |
|
if($var_value =~ /\Q|||$raw_name|||\E/) { |
|
$checked = "checked='checked'"; |
|
} |
|
$col .= |
|
"<td align='center'><input type='checkbox' name ='$option_var". |
|
".forminput' value='". |
|
$resource_name . "' $checked /> </td>"; |
|
} |
|
} |
|
|
|
$col .= "<td align='center'><input type='$inputType' name='${var}.forminput' "; |
|
if (%defaultSymbs) { |
|
my $symb=$resource->symb(); |
|
if (exists($defaultSymbs{$symb})) { |
|
$col .= "checked='checked' "; |
|
$checked = 1; |
|
} |
|
} else { |
|
if (!$checked && !$multichoice) { |
|
$col .= "checked='checked' "; |
|
$checked = 1; |
|
} |
|
if ($multichoice) { # all resources start checked; see bug 1174 |
|
$col .= "checked='checked' "; |
|
$checked = 1; |
|
} |
|
} |
|
$col .= "value='" . $resource_name . "' /></td>"; |
|
|
|
return $result.$col; |
|
} |
|
}; |
|
my $renderPartsFunc = sub { |
|
my ($resource, $part, $params) = @_; |
|
my $col= "<td>"; |
|
my $id=$resource->{ID}; |
|
my $resource_name = |
|
&HTML::Entities::encode(&$valueFunc($resource),"<>&\"'"); |
|
if ($addparts && (scalar(@{$resource->parts}) > 1)) { |
|
$col .= "<select onclick=\"javascript:updateRadio(this.form,'${var}.forminput','$resource_name');updateHidden(this.form,'$id','${var}');\" name='part_$id.forminput'>\n"; |
|
$col .= "<option value=\"$part\">All Parts</option>\n"; |
|
foreach my $part (@{$resource->parts}) { |
|
$col .= "<option value=\"$part\">Part: $part</option>\n"; |
|
} |
|
$col .= "</select>"; |
|
} |
|
$col .= "</td>"; |
|
}; |
|
$result.=(<<RADIO); |
|
<script type="text/javascript"> |
|
// <!-- |
|
function updateRadio(form,name,value) { |
|
var radiobutton=form[name]; |
|
for (var i=0; i<radiobutton.length; i++) { |
|
if (radiobutton[i].value == value) { |
|
radiobutton[i].checked = true; |
|
break; |
|
} |
|
} |
|
} |
|
function updateHidden(form,id,name) { |
|
var select=form['part_'+id+'.forminput']; |
|
var hidden=form[name+'_part.forminput']; |
|
var which=select.selectedIndex; |
|
hidden.value=select.options[which].value; |
|
} |
|
// --> |
|
</script> |
|
<input type="hidden" name="${var}_part.forminput" /> |
|
|
|
RADIO |
|
$env{'form.condition'} = !$self->{'toponly'}; |
|
my $cols = [$renderColFunc]; |
|
if ($self->{'addparts'}) { push(@$cols, $renderPartsFunc); } |
|
push(@$cols, Apache::lonnavmaps::resource()); |
|
if ($self->{'addstatus'}) { |
|
push @$cols, (Apache::lonnavmaps::part_status_summary()); |
|
|
|
} |
|
$result .= |
|
&Apache::lonnavmaps::render( { 'cols' => $cols, |
|
'showParts' => 0, |
|
'filterFunc' => $filterFunc, |
|
'resource_no_folder_link' => 1, |
|
'closeAllPages' => $self->{'closeallpages'}, |
|
'suppressEmptySequences' => $self->{'suppressEmptySequences'}, |
|
'iterator_map' => $mapUrl } |
|
); |
|
|
|
$result .= $buttons; |
|
|
|
return $result; |
|
} |
|
|
|
sub postprocess { |
|
my $self = shift; |
|
|
|
if ($self->{'multichoice'} && !$helper->{VARS}->{$self->{'variable'}}) { |
|
$self->{ERROR_MSG} = 'You must choose at least one resource to continue.'; |
|
return 0; |
|
} |
|
|
|
if (defined($self->{NEXTSTATE})) { |
|
$helper->changeState($self->{NEXTSTATE}); |
|
} |
|
|
|
return 1; |
|
} |
|
|
|
1; |
|
|
|
package Apache::lonhelper::student; |
|
|
|
=pod |
|
|
|
=head2 Element: studentX<student, helper element> |
|
|
|
Student elements display a choice of students enrolled in the current |
|
course. Currently it is primitive; this is expected to evolve later. |
|
|
|
Student elements take the following attributes: |
|
|
|
=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. |
|
|
|
=item * B<emptyallowed>: |
|
|
|
If true, the selection of no users is allowed. Defaults to false. |
|
|
|
=back |
|
|
|
=cut |
|
|
|
no strict; |
|
@ISA = ("Apache::lonhelper::element"); |
|
use strict; |
|
use Apache::lonlocal; |
|
use Apache::lonnet; |
|
|
|
BEGIN { |
|
&Apache::lonhelper::register('Apache::lonhelper::student', |
|
('student')); |
|
} |
|
|
|
sub new { |
|
my $ref = Apache::lonhelper::element->new(); |
|
bless($ref); |
|
} |
|
|
|
sub start_student { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
|
|
$paramHash->{'variable'} = $token->[2]{'variable'}; |
|
$helper->declareVar($paramHash->{'variable'}); |
|
$paramHash->{'multichoice'} = $token->[2]{'multichoice'}; |
|
$paramHash->{'coursepersonnel'} = $token->[2]{'coursepersonnel'}; |
|
$paramHash->{'activeonly'} = $token->[2]{'activeonly'}; |
|
if (defined($token->[2]{'nextstate'})) { |
|
$paramHash->{NEXTSTATE} = $token->[2]{'nextstate'}; |
|
} |
|
$paramHash->{'emptyallowed'} = $token->[2]{'emptyallowed'}; |
|
|
sub end_message_text { return 1; } |
} |
|
|
|
sub end_student { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
Apache::lonhelper::student->new(); |
|
} |
|
|
|
sub render { |
|
my $self = shift; |
|
my $result = ''; |
|
my $buttons = ''; |
|
my $var = $self->{'variable'}; |
|
|
|
|
|
if (defined $self->{ERROR_MSG}) { |
|
$result .= '<font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br /><br />'; |
|
} |
|
|
|
my %defaultUsers; |
|
if (defined($self->{DEFAULT_VALUE})) { |
|
my $valueFunc = eval($self->{DEFAULT_VALUE}); |
|
die 'Error in default value code for variable ' . |
|
$self->{'variable'} . ', Perl said: ' . $@ if $@; |
|
my @defaultUsers = &$valueFunc($helper, $self); |
|
if (!$self->{'multichoice'} && @defaultUsers) { # only allowed 1 |
|
@defaultUsers = ($defaultUsers[0]); |
|
} |
|
%defaultUsers = map { if ($_) {($_,1) } } @defaultUsers; |
|
delete($defaultUsers{''}); |
|
} |
|
|
|
|
|
my ($course_personnel, |
|
$current_members, |
|
$expired_members, |
|
$future_members) = |
|
&Apache::lonselstudent::get_people_in_class($env{'request.course.sec'}); |
|
|
|
|
|
|
|
# Load up the non-students, if necessary |
|
|
|
if ($self->{'coursepersonnel'}) { |
|
unshift @$current_members, (@$course_personnel); |
|
} |
|
|
|
|
|
# Current personel |
|
|
|
$result .= &Apache::lonselstudent::render_student_list( $current_members, |
|
"helpform", |
|
"current", |
|
\%defaultUsers, |
|
$self->{'multichoice'}, |
|
$self->{'variable'}, |
|
1); |
|
|
|
|
|
# If activeonly is not set then we can also give the expired students: |
|
# |
|
if (!$self->{'activeonly'} && ((scalar @$expired_members) > 0)) { |
|
|
|
# And future. |
|
|
|
$result .= &Apache::lonselstudent::render_student_list( $future_members, |
|
"helpform", |
|
"future", |
|
\%defaultUsers, |
|
$self->{'multichoice'}, |
|
$self->{'variable'}, |
|
0); |
|
# Past |
|
|
|
$result .= &Apache::lonselstudent::render_student_list($expired_members, |
|
"helpform", |
|
"past", |
|
\%defaultUsers, |
|
$self->{'multichoice'}, |
|
$self->{'variable'}, |
|
0); |
|
} |
|
|
|
|
|
|
|
return $result; |
|
} |
|
|
|
sub postprocess { |
|
my $self = shift; |
|
|
|
my $result = $env{'form.' . $self->{'variable'} . '.forminput'}; |
|
if (!$result && !$self->{'emptyallowed'}) { |
|
if ($self->{'coursepersonnel'}) { |
|
$self->{ERROR_MSG} = |
|
&mt('You must choose at least one user to continue.'); |
|
} else { |
|
$self->{ERROR_MSG} = |
|
&mt('You must choose at least one student to continue.'); |
|
} |
|
return 0; |
|
} |
|
|
|
if (defined($self->{NEXTSTATE})) { |
|
$helper->changeState($self->{NEXTSTATE}); |
|
} |
|
|
|
return 1; |
|
} |
|
|
|
1; |
|
|
|
package Apache::lonhelper::files; |
|
|
|
=pod |
|
|
|
=head2 Element: filesX<files, helper element> |
|
|
|
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 |
|
delimited entry in the helper variables. |
|
|
|
Since it is extremely unlikely that you can actually code a constant |
|
representing the directory you wish to allow the user to search, <files> |
|
takes a subroutine that returns the name of the directory you wish to |
|
have the user browse. |
|
|
|
files accepts the attribute "variable" to control where the files chosen |
|
are put. It accepts the attribute "multichoice" as the other attribute, |
|
defaulting to false, which if true will allow the user to select more |
|
then one choice. |
|
|
|
<files> accepts three subtags: |
|
|
|
=over 4 |
|
|
|
=item * B<nextstate>: works as it does with the other tags. |
|
|
|
=item * B<filechoice>: When the contents of this tag are surrounded by |
|
"sub {" and "}", will return a string representing what directory |
|
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 |
|
|
|
no strict; |
|
@ISA = ("Apache::lonhelper::element"); |
|
use strict; |
|
use Apache::lonlocal; |
|
use Apache::lonnet; |
|
use Apache::lonpubdir; # for getTitleString |
|
|
|
BEGIN { |
|
&Apache::lonhelper::register('Apache::lonhelper::files', |
|
('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 { |
|
my $ref = Apache::lonhelper::element->new(); |
|
bless($ref); |
|
} |
|
|
|
sub start_files { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
$paramHash->{'variable'} = $token->[2]{'variable'}; |
|
$helper->declareVar($paramHash->{'variable'}); |
|
$paramHash->{'multichoice'} = $token->[2]{'multichoice'}; |
|
} |
|
|
|
sub end_files { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
if (!defined($paramHash->{FILTER_FUNC})) { |
|
$paramHash->{FILTER_FUNC} = sub { return 1; }; |
|
} |
|
Apache::lonhelper::files->new(); |
|
} |
|
|
|
sub start_filechoice { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
$paramHash->{'filechoice'} = Apache::lonxml::get_all_text('/filechoice', |
|
$parser); |
|
} |
|
|
|
sub end_filechoice { return ''; } |
|
|
|
sub start_filefilter { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
|
|
my $contents = Apache::lonxml::get_all_text('/filefilter', |
|
$parser); |
|
$contents = 'sub { my $filename = shift; ' . $contents . '}'; |
|
$paramHash->{FILTER_FUNC} = eval $contents; |
|
} |
|
|
|
sub end_filefilter { return ''; } |
|
|
|
{ |
|
# used to generate unique id attributes for <input> tags. |
|
# internal use only. |
|
my $id=0; |
|
sub new_id { return $id++;} |
|
} |
|
|
|
sub render { |
|
my $self = shift; |
|
my $result = ''; |
|
my $var = $self->{'variable'}; |
|
|
|
my $subdirFunc = eval('sub {' . $self->{'filechoice'} . '}'); |
|
die 'Error in resource filter code for variable ' . |
|
{'variable'} . ', Perl said:' . $@ if $@; |
|
|
|
my $subdir = &$subdirFunc(); |
|
|
|
my $filterFunc = $self->{FILTER_FUNC}; |
|
if (!defined($filterFunc)) { |
|
$filterFunc = ¬_old_version; |
|
} |
|
my $buttons = ''; |
|
my $type = 'radio'; |
|
if ($self->{'multichoice'}) { |
|
$type = 'checkbox'; |
|
} |
|
|
|
if ($self->{'multichoice'}) { |
|
$result = <<SCRIPT; |
|
<script type="text/javascript"> |
|
// <!-- |
|
function checkall(value, checkName) { |
|
for (i=0; i<document.forms.helpform.elements.length; i++) { |
|
ele = document.forms.helpform.elements[i]; |
|
if (ele.name == checkName + '.forminput') { |
|
document.forms.helpform.elements[i].checked=value; |
|
} |
|
} |
|
} |
|
|
|
function checkallclass(value, className) { |
|
for (i=0; i<document.forms.helpform.elements.length; i++) { |
|
ele = document.forms.helpform.elements[i]; |
|
if (ele.type == "$type" && ele.onclick) { |
|
document.forms.helpform.elements[i].checked=value; |
|
} |
|
} |
|
} |
|
// --> |
|
</script> |
|
SCRIPT |
|
my %lt=&Apache::lonlocal::texthash( |
|
'saf' => "Select All Files", |
|
'uaf' => "Unselect All Files"); |
|
$buttons = <<BUTTONS; |
|
<br /> |
|
<input type="button" onclick="checkall(true, '$var')" value="$lt{'saf'}" /> |
|
<input type="button" onclick="checkall(false, '$var')" value="$lt{'uaf'}" /> |
|
BUTTONS |
|
|
|
%lt=&Apache::lonlocal::texthash( |
|
'sap' => "Select All Published", |
|
'uap' => "Unselect All Published"); |
|
if ($helper->{VARS}->{'construction'}) { |
|
$buttons .= <<BUTTONS; |
|
<input type="button" onclick="checkallclass(true, 'Published')" value="$lt{'sap'}" /> |
|
<input type="button" onclick="checkallclass(false, 'Published')" value="$lt{'uap'}" /> |
|
<br /> |
|
BUTTONS |
|
} |
|
} |
|
|
|
# Get the list of files in this directory. |
|
my @fileList; |
|
|
|
# If the subdirectory is in local CSTR space |
|
my $metadir; |
|
if ($subdir =~ m|/home/([^/]+)/public_html/(.*)|) { |
|
my ($user,$domain)= |
|
&Apache::loncacc::constructaccess($subdir, |
|
$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,$domain)= |
|
&Apache::loncacc::constructaccess($subdir, |
|
$Apache::lonnet::perlvar{'lonDefDomain'}); |
|
$metadir='/res/'.$domain.'/'.$user.'/'.$2; |
|
@fileList = &Apache::lonnet::dirlist($subdir, $domain, $user, ''); |
|
} else { |
|
# local library server resource space |
|
@fileList = &Apache::lonnet::dirlist($subdir, $env{'user.domain'}, $env{'user.name'}, ''); |
|
} |
|
|
|
# Sort the fileList into order |
|
@fileList = sort {lc($a) cmp lc($b)} @fileList; |
|
|
|
$result .= $buttons; |
|
|
|
if (defined $self->{ERROR_MSG}) { |
|
$result .= '<br /><font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br /><br />'; |
|
} |
|
|
|
$result .= '<table border="0" cellpadding="2" cellspacing="0">'; |
|
|
|
# Keeps track if there are no choices, prints appropriate error |
|
# if there are none. |
|
my $choices = 0; |
|
# Print each legitimate file choice. |
|
for my $file (@fileList) { |
|
$file = (split(/&/, $file))[0]; |
|
if ($file eq '.' || $file eq '..') { |
|
next; |
|
} |
|
my $fileName = $subdir .'/'. $file; |
|
if (&$filterFunc($file)) { |
|
my $status; |
|
my $color; |
|
if ($helper->{VARS}->{'construction'}) { |
|
($status, $color) = @{fileState($subdir, $file)}; |
|
} else { |
|
$status = ''; |
|
$color = ''; |
|
} |
|
|
|
# Get the title |
|
my $title = Apache::lonpubdir::getTitleString(($metadir?$metadir:$subdir) .'/'. $file); |
|
|
|
# Netscape 4 is stupid and there's nowhere to put the |
|
# information on the input tag that the file is Published, |
|
# Unpublished, etc. In *real* browsers we can just say |
|
# "class='Published'" and check the className attribute of |
|
# the input tag, but Netscape 4 is too stupid to understand |
|
# that attribute, and un-comprehended attributes are not |
|
# reflected into the object model. So instead, what I do |
|
# is either have or don't have an "onclick" handler that |
|
# does nothing, give Published files the onclick handler, and |
|
# have the checker scripts check for that. Stupid and clumsy, |
|
# and only gives us binary "yes/no" information (at least I |
|
# couldn't figure out how to reach into the event handler's |
|
# actual code to retreive a value), but it works well enough |
|
# here. |
|
|
|
my $onclick = ''; |
|
if ($status eq 'Published' && $helper->{VARS}->{'construction'}) { |
|
$onclick = 'onclick="a=1" '; |
|
} |
|
my $id = &new_id(); |
|
$result .= '<tr><td align="right"' . " bgcolor='$color'>" . |
|
"<input $onclick type='$type' name='" . $var |
|
. ".forminput' ".qq{id="$id"}." value='" . HTML::Entities::encode($fileName,"<>&\"'"). |
|
"'"; |
|
if (!$self->{'multichoice'} && $choices == 0) { |
|
$result .= ' checked="checked"'; |
|
} |
|
$result .= "/></td><td bgcolor='$color'>". |
|
qq{<label for="$id">}. $file . "</label></td>" . |
|
"<td bgcolor='$color'>$title</td>" . |
|
"<td bgcolor='$color'>$status</td>" . "</tr>\n"; |
|
$choices++; |
|
} |
|
} |
|
|
|
$result .= "</table>\n"; |
|
|
|
if (!$choices) { |
|
$result .= '<font color="#FF0000">There are no files available to select in this directory ('.$subdir.'). Please go back and select another option.</font><br /><br />'; |
|
} |
|
|
|
$result .= $buttons; |
|
|
|
return $result; |
|
} |
|
|
|
# Determine the state of the file: Published, unpublished, modified. |
|
# Return the color it should be in and a label as a two-element array |
|
# reference. |
|
# Logic lifted from lonpubdir.pm, even though I don't know that it's still |
|
# the most right thing to do. |
|
|
|
sub fileState { |
|
my $constructionSpaceDir = shift; |
|
my $file = shift; |
|
|
|
my ($uname,$udom)=($env{'user.name'},$env{'user.domain'}); |
|
if ($env{'request.role'}=~/^ca\./) { |
|
(undef,$udom,$uname)=split(/\//,$env{'request.role'}); |
|
} |
|
my $docroot = $Apache::lonnet::perlvar{'lonDocRoot'}; |
|
my $subdirpart = $constructionSpaceDir; |
|
$subdirpart =~ s/^\/home\/$uname\/public_html//; |
|
my $resdir = $docroot . '/res/' . $udom . '/' . $uname . |
|
$subdirpart; |
|
|
|
my @constructionSpaceFileStat = stat($constructionSpaceDir . '/' . $file); |
|
my @resourceSpaceFileStat = stat($resdir . '/' . $file); |
|
if (!@resourceSpaceFileStat) { |
|
return ['Unpublished', '#FFCCCC']; |
|
} |
|
|
|
my $constructionSpaceFileModified = $constructionSpaceFileStat[9]; |
|
my $resourceSpaceFileModified = $resourceSpaceFileStat[9]; |
|
|
|
if ($constructionSpaceFileModified > $resourceSpaceFileModified) { |
|
return ['Modified', '#FFFFCC']; |
|
} |
|
return ['Published', '#CCFFCC']; |
|
} |
|
|
|
sub postprocess { |
|
my $self = shift; |
|
my $result = $env{'form.' . $self->{'variable'} . '.forminput'}; |
|
if (!$result) { |
|
$self->{ERROR_MSG} = 'You must choose at least one file '. |
|
'to continue.'; |
|
return 0; |
|
} |
|
|
|
if (defined($self->{NEXTSTATE})) { |
|
$helper->changeState($self->{NEXTSTATE}); |
|
} |
|
|
|
return 1; |
|
} |
|
|
|
1; |
|
|
|
package Apache::lonhelper::section; |
|
|
|
=pod |
|
|
|
=head2 Element: sectionX<section, helper element> |
|
|
|
<section> allows the user to choose one or more sections from the current |
|
course. |
|
|
|
It takes the standard attributes "variable", "multichoice", |
|
"allowempty" and "nextstate", meaning what they do for most other |
|
elements. |
|
|
|
also takes a boolean 'onlysections' whcih will restrict this to only |
|
have sections and not include groups |
|
|
|
=cut |
|
|
|
no strict; |
|
@ISA = ("Apache::lonhelper::choices"); |
|
use strict; |
|
|
|
BEGIN { |
|
&Apache::lonhelper::register('Apache::lonhelper::section', |
|
('section')); |
|
} |
|
|
|
sub new { |
|
my $ref = Apache::lonhelper::choices->new(); |
|
bless($ref); |
|
} |
|
|
|
sub start_section { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
|
|
$paramHash->{CHOICES} = []; |
|
|
|
$paramHash->{'variable'} = $token->[2]{'variable'}; |
|
$helper->declareVar($paramHash->{'variable'}); |
|
$paramHash->{'multichoice'} = $token->[2]{'multichoice'}; |
|
$paramHash->{'allowempty'} = $token->[2]{'allowempty'}; |
|
if (defined($token->[2]{'nextstate'})) { |
|
$paramHash->{NEXTSTATE} = $token->[2]{'nextstate'}; |
|
} |
|
|
|
# Populate the CHOICES element |
|
my %choices; |
|
|
|
my $section = Apache::loncoursedata::CL_SECTION(); |
|
my $classlist = Apache::loncoursedata::get_classlist(); |
|
foreach my $user (keys(%$classlist)) { |
|
my $section_name = $classlist->{$user}[$section]; |
|
if (!$section_name) { |
|
$choices{"No section assigned"} = ""; |
|
} else { |
|
$choices{$section_name} = $section_name; |
|
} |
|
} |
|
|
|
if (exists($choices{"No section assigned"})) { |
|
push(@{$paramHash->{CHOICES}}, |
|
['No section assigned','No section assigned']); |
|
delete($choices{"No section assigned"}); |
|
} |
|
for my $section_name (sort {lc($a) cmp lc($b) } (keys(%choices))) { |
|
push @{$paramHash->{CHOICES}}, [$section_name, $section_name]; |
|
} |
|
return if ($token->[2]{'onlysections'}); |
|
|
|
# add in groups to the end of the list |
|
my %curr_groups = &Apache::longroup::coursegroups(); |
|
foreach my $group_name (sort(keys(%curr_groups))) { |
|
push(@{$paramHash->{CHOICES}}, [$group_name, $group_name]); |
|
} |
|
} |
|
|
|
sub end_section { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
Apache::lonhelper::section->new(); |
|
} |
|
1; |
|
|
|
package Apache::lonhelper::group; |
|
|
|
=pod |
|
|
|
=head2 Element: groupX<group, helper element> |
|
|
|
<group> allows the user to choose one or more groups from the current course. |
|
|
|
It takes the standard attributes "variable", "multichoice", |
|
"allowempty" and "nextstate", meaning what they do for most other |
|
elements. |
|
|
|
=cut |
|
|
|
no strict; |
|
@ISA = ("Apache::lonhelper::choices"); |
|
use strict; |
|
|
|
BEGIN { |
|
&Apache::lonhelper::register('Apache::lonhelper::group', |
|
('group')); |
|
} |
|
|
|
sub new { |
|
my $ref = Apache::lonhelper::choices->new(); |
|
bless($ref); |
|
} |
|
|
|
sub start_group { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
|
|
$paramHash->{CHOICES} = []; |
|
|
|
$paramHash->{'variable'} = $token->[2]{'variable'}; |
|
$helper->declareVar($paramHash->{'variable'}); |
|
$paramHash->{'multichoice'} = $token->[2]{'multichoice'}; |
|
$paramHash->{'allowempty'} = $token->[2]{'allowempty'}; |
|
if (defined($token->[2]{'nextstate'})) { |
|
$paramHash->{NEXTSTATE} = $token->[2]{'nextstate'}; |
|
} |
|
|
|
# Populate the CHOICES element |
|
my %choices; |
|
|
|
my %curr_groups = &Apache::longroup::coursegroups(); |
|
foreach my $group_name (sort {lc($a) cmp lc($b)} (keys(%curr_groups))) { |
|
push(@{$paramHash->{CHOICES}}, [$group_name, $group_name]); |
|
} |
|
} |
|
|
|
sub end_group { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
Apache::lonhelper::group->new(); |
|
} |
|
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; |
|
use Apache::lonlocal; |
|
|
|
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 { |
sub render { |
my $self = shift; |
my $self = shift; |
|
my $result = ''; |
|
|
|
if (defined $self->{ERROR_MSG}) { |
|
$result .= '<p><font color="#FF0000">' . $self->{ERROR_MSG} . '</font></p>'; |
|
} |
|
|
|
$result .= '<input type="string" name="' . $self->{'variable'} . '.forminput"'; |
|
|
|
if (defined($self->{'size'})) { |
|
$result .= ' size="' . $self->{'size'} . '"'; |
|
} |
|
if (defined($self->{'maxlength'})) { |
|
$result .= ' maxlength="' . $self->{'maxlength'} . '"'; |
|
} |
|
|
return $self->{MESSAGE_TEXT}; |
if (defined($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 NEXT_STATE was given, switch to it |
|
|
# If a NEXTSTATE was given, switch to it |
sub postprocess { |
sub postprocess { |
my $self = shift; |
my $self = shift; |
if (defined($self->{NEXT_STATE})) { |
|
$helper->changeState($self->{NEXT_STATE}); |
if (defined($self->{VALIDATOR})) { |
|
my $validator = eval($self->{VALIDATOR}); |
|
die 'Died during evaluation of validator 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; |
|
|
|
=pod |
|
|
|
=head2 General-purpose tag: <exec>X<exec, helper tag> |
|
|
|
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 |
|
will be executed as a subroutine wrapped with the following code: |
|
|
|
"sub { my $helper = shift; my $state = shift;" and |
|
|
|
"}" |
|
|
|
The return value is ignored. |
|
|
|
$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, |
|
overriding the form location if the state is the final state; see |
|
parameter.helper for an example). |
|
|
|
$state is the $paramHash that has currently been generated and may |
|
be manipulated by the code in exec. Note that the $state is not yet |
|
an actual state B<object>, it is just a hash, so do not expect to |
|
be able to call methods on it. |
|
|
|
=cut |
|
|
|
use Apache::lonlocal; |
|
use Apache::lonnet; |
|
|
|
BEGIN { |
|
&Apache::lonhelper::register('Apache::lonhelper::general', |
|
'exec', 'condition', 'clause', |
|
'eval'); |
|
} |
|
|
|
sub start_exec { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
} |
} |
|
|
|
my $code = &Apache::lonxml::get_all_text('/exec', $parser); |
|
|
|
$code = eval ('sub { my $helper = shift; my $state = shift; ' . |
|
$code . "}"); |
|
die 'Error in <exec>, Perl said: '. $@ if $@; |
|
&$code($helper, $paramHash); |
} |
} |
|
|
|
sub end_exec { return ''; } |
|
|
|
=pod |
|
|
|
=head2 General-purpose tag: <condition> |
|
|
|
The <condition> tag allows you to mask out parts of the helper code |
|
depending on some programatically determined condition. The condition |
|
tag contains a tag <clause> which contains perl code that when wrapped |
|
with "sub { my $helper = shift; my $state = shift; " and "}", returns |
|
a true value if the XML in the condition should be evaluated as a normal |
|
part of the helper, or false if it should be completely discarded. |
|
|
|
The <clause> tag must be the first sub-tag of the <condition> tag or |
|
it will not work as expected. |
|
|
|
=cut |
|
|
|
# The condition tag just functions as a marker, it doesn't have |
|
# to "do" anything. Technically it doesn't even have to be registered |
|
# with the lonxml code, but I leave this here to be explicit about it. |
|
sub start_condition { return ''; } |
|
sub end_condition { return ''; } |
|
|
|
sub start_clause { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
|
|
my $clause = Apache::lonxml::get_all_text('/clause', $parser); |
|
$clause = eval('sub { my $helper = shift; my $state = shift; ' |
|
. $clause . '}'); |
|
die 'Error in clause of condition, Perl said: ' . $@ if $@; |
|
if (!&$clause($helper, $paramHash)) { |
|
# Discard all text until the /condition. |
|
my $end_tag = $paramHash->{SKIPTAG} || '/condition'; |
|
&Apache::lonxml::get_all_text($end_tag, $parser); |
|
} |
|
} |
|
|
|
sub end_clause { return ''; } |
|
|
|
=pod |
|
|
|
=head2 General-purpose tag: <eval>X<eval, helper tag> |
|
|
|
The <eval> tag will be evaluated as a subroutine call passed in the |
|
current helper object and state hash as described in <condition> above, |
|
but is expected to return a string to be printed directly to the |
|
screen. This is useful for dynamically generating messages. |
|
|
|
=cut |
|
|
|
# This is basically a type of message. |
|
# Programmatically setting $paramHash->{NEXTSTATE} would work, though |
|
# it's probably bad form. |
|
|
|
sub start_eval { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
|
|
my $program = Apache::lonxml::get_all_text('/eval', $parser); |
|
$program = eval('sub { my $helper = shift; my $state = shift; ' |
|
. $program . '}'); |
|
die 'Error in eval code, Perl said: ' . $@ if $@; |
|
$paramHash->{MESSAGE_TEXT} = &$program($helper, $paramHash); |
|
} |
|
|
|
sub end_eval { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
|
|
Apache::lonhelper::message->new(); |
|
} |
|
|
|
1; |
|
|
|
package Apache::lonhelper::final; |
|
|
|
=pod |
|
|
|
=head2 Element: finalX<final, helper tag> |
|
|
|
<final> is a special element that works with helpers that use 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 |
|
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. |
|
|
|
If the parameter "restartCourse" is not true a 'Finish' Button will be |
|
presented that takes the user back to whatever was defined as <exitpage> |
|
|
|
=cut |
|
|
|
no strict; |
|
@ISA = ("Apache::lonhelper::element"); |
|
use strict; |
|
use Apache::lonlocal; |
|
use Apache::lonnet; |
|
BEGIN { |
|
&Apache::lonhelper::register('Apache::lonhelper::final', |
|
('final', 'exitpage')); |
|
} |
|
|
|
sub new { |
|
my $ref = Apache::lonhelper::element->new(); |
|
bless($ref); |
|
} |
|
|
|
sub start_final { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
|
|
$paramHash->{'restartCourse'} = $token->[2]{'restartCourse'}; |
|
|
|
return ''; |
|
} |
|
|
|
sub end_final { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
|
|
Apache::lonhelper::final->new(); |
|
|
|
return ''; |
|
} |
|
|
|
sub start_exitpage { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
|
|
$paramHash->{EXIT_PAGE} = &Apache::lonxml::get_all_text('/exitpage', |
|
$parser); |
|
|
|
return ''; |
|
} |
|
|
|
sub end_exitpage { return ''; } |
|
|
|
sub render { |
|
my $self = shift; |
|
|
|
my @results; |
|
|
|
# Collect all the results |
|
for my $stateName (keys %{$helper->{STATES}}) { |
|
my $state = $helper->{STATES}->{$stateName}; |
|
|
|
for my $element (@{$state->{ELEMENTS}}) { |
|
if (defined($element->{FINAL_CODE})) { |
|
# Compile the code. |
|
my $code = 'sub { my $helper = shift; my $element = shift; ' |
|
. $element->{FINAL_CODE} . '}'; |
|
$code = eval($code); |
|
die 'Error while executing final code for element with var ' . |
|
$element->{'variable'} . ', Perl said: ' . $@ if $@; |
|
|
|
my $result = &$code($helper, $element); |
|
if ($result) { |
|
push @results, $result; |
|
} |
|
} |
|
} |
|
} |
|
|
|
my $result; |
|
|
|
if (scalar(@results) != 0) { |
|
$result .= "<ul>\n"; |
|
for my $re (@results) { |
|
$result .= ' <li>' . $re . "</li>\n"; |
|
} |
|
|
|
if (!@results) { |
|
$result .= ' <li>' . |
|
&mt('No changes were made to current settings.') . '</li>'; |
|
} |
|
|
|
$result .= '</ul>'; |
|
} |
|
|
|
my $actionURL = $self->{EXIT_PAGE}; |
|
my $targetURL = ''; |
|
my $finish=&mt('Finish'); |
|
if ($self->{'restartCourse'}) { |
|
$actionURL = '/adm/roles'; |
|
$targetURL = '/adm/menu'; |
|
if ($env{'course.'.$env{'request.course.id'}.'.url'}=~/^uploaded/) { |
|
$targetURL = '/adm/coursedocs'; |
|
} else { |
|
$targetURL = '/adm/navmaps'; |
|
} |
|
if ($env{'course.'.$env{'request.course.id'}.'.clonedfrom'}) { |
|
$targetURL = '/adm/parmset?overview=1'; |
|
} |
|
my $finish=&mt('Finish Course Initialization'); |
|
} |
|
my $previous = HTML::Entities::encode(&mt("<- Previous"), '<>&"'); |
|
my $next = HTML::Entities::encode(&mt("Next ->"), '<>&"'); |
|
my $target = " target='loncapaclient'"; |
|
if (($env{'browser.interface'} eq 'textual') || |
|
($env{'environment.remote'} eq 'off')) { $target=''; } |
|
$result .= "<center>\n" . |
|
"<form action='".$actionURL."' method='post' $target>\n" . |
|
"<input type='button' onclick='history.go(-1)' value='$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 . "' />\n" . |
|
"</form></center>"; |
|
|
|
return $result; |
|
} |
|
|
|
sub overrideForm { |
|
return 1; |
|
} |
|
|
|
1; |
|
|
|
package Apache::lonhelper::parmwizfinal; |
|
|
|
# This is the final state for the parmwizard. It is not generally useful, |
|
# so it is not perldoc'ed. It does its own processing. |
|
# It is represented with <parmwizfinal />, and |
|
# should later be moved to lonparmset.pm . |
|
|
|
no strict; |
|
@ISA = ('Apache::lonhelper::element'); |
|
use strict; |
|
use Apache::lonlocal; |
|
use Apache::lonnet; |
|
|
|
BEGIN { |
|
&Apache::lonhelper::register('Apache::lonhelper::parmwizfinal', |
|
('parmwizfinal')); |
|
} |
|
|
|
use Time::localtime; |
|
|
|
sub new { |
|
my $ref = Apache::lonhelper::choices->new(); |
|
bless ($ref); |
|
} |
|
|
|
sub start_parmwizfinal { return ''; } |
|
|
|
sub end_parmwizfinal { |
|
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
|
|
if ($target ne 'helper') { |
|
return ''; |
|
} |
|
Apache::lonhelper::parmwizfinal->new(); |
|
} |
|
|
|
# Renders a form that, when submitted, will form the input to lonparmset.pm |
|
sub render { |
|
my $self = shift; |
|
my $vars = $helper->{VARS}; |
|
|
|
# FIXME: Unify my designators with the standard ones |
|
my %dateTypeHash = ('open_date' => "opening date", |
|
'due_date' => "due date", |
|
'answer_date' => "answer date", |
|
'tries' => 'number of tries', |
|
'weight' => 'problem weight' |
|
); |
|
my %parmTypeHash = ('open_date' => "0_opendate", |
|
'due_date' => "0_duedate", |
|
'answer_date' => "0_answerdate", |
|
'tries' => '0_maxtries', |
|
'weight' => '0_weight' ); |
|
my %realParmName = ('open_date' => "opendate", |
|
'due_date' => "duedate", |
|
'answer_date' => "answerdate", |
|
'tries' => 'maxtries', |
|
'weight' => 'weight' ); |
|
|
|
my $affectedResourceId = ""; |
|
my $parm_name = $parmTypeHash{$vars->{ACTION_TYPE}}; |
|
my $level = ""; |
|
my $resourceString; |
|
my $symb; |
|
my $paramlevel; |
|
|
|
# Print the granularity, depending on the action |
|
if ($vars->{GRANULARITY} eq 'whole_course') { |
|
$resourceString .= '<li>'.&mt('for <b>all resources in the course</b>').'</li>'; |
|
if ($vars->{TARGETS} eq 'course') { |
|
$level = 14; # general course, see lonparmset.pm perldoc |
|
} elsif ($vars->{TARGETS} eq 'section') { |
|
$level = 9; |
|
} elsif ($vars->{TARGETS} eq 'group') { |
|
$level = 6; |
|
} else { |
|
$level = 3; |
|
} |
|
$affectedResourceId = "0.0"; |
|
$symb = 'a'; |
|
$paramlevel = 'general'; |
|
} elsif ($vars->{GRANULARITY} eq 'map') { |
|
my $navmap = Apache::lonnavmaps::navmap->new(); |
|
my $res = $navmap->getByMapPc($vars->{RESOURCE_ID}); |
|
my $title = $res->compTitle(); |
|
$symb = $res->symb(); |
|
$resourceString .= '<li>'.&mt('for the map named [_1]',"<b>$title</b>").'</li>'; |
|
if ($vars->{TARGETS} eq 'course') { |
|
$level = 13; # general course, see lonparmset.pm perldoc |
|
} elsif ($vars->{TARGETS} eq 'section') { |
|
$level = 8; |
|
} elsif ($vars->{TARGETS} eq 'group') { |
|
$level = 5; |
|
} else { |
|
$level = 2; |
|
} |
|
$affectedResourceId = $vars->{RESOURCE_ID}; |
|
$paramlevel = 'map'; |
|
} else { |
|
my $navmap = Apache::lonnavmaps::navmap->new(); |
|
my $res = $navmap->getById($vars->{RESOURCE_ID}); |
|
my $part = $vars->{RESOURCE_ID_part}; |
|
if ($part ne 'All Parts' && $part) { $parm_name=~s/^0/$part/; } else { $part=&mt('All Parts'); } |
|
$symb = $res->symb(); |
|
my $title = $res->compTitle(); |
|
$resourceString .= '<li>'.&mt('for the resource named [_1] part [_2]',"<b>$title</b>","<b>$part</b>").'</li>'; |
|
if ($vars->{TARGETS} eq 'course') { |
|
$level = 10; # general course, see lonparmset.pm perldoc |
|
} elsif ($vars->{TARGETS} eq 'section') { |
|
$level = 7; |
|
} elsif ($vars->{TARGETS} eq 'group') { |
|
$level = 4; |
|
} else { |
|
$level = 1; |
|
} |
|
$affectedResourceId = $vars->{RESOURCE_ID}; |
|
$paramlevel = 'full'; |
|
} |
|
|
|
my $result = "<form name='helpform' method='POST' action='/adm/parmset#$affectedResourceId&$parm_name&$level'>\n"; |
|
$result .= "<input type='hidden' name='action' value='settable' />\n"; |
|
$result .= "<input type='hidden' name='dis' value='helper' />\n"; |
|
$result .= "<input type='hidden' name='pscat' value='". |
|
$realParmName{$vars->{ACTION_TYPE}}."' />\n"; |
|
if ($vars->{GRANULARITY} eq 'resource') { |
|
$result .= "<input type='hidden' name='symb' value='". |
|
HTML::Entities::encode($symb,"'<>&\"") . "' />\n"; |
|
} elsif ($vars->{GRANULARITY} eq 'map') { |
|
$result .= "<input type='hidden' name='pschp' value='". |
|
$affectedResourceId."' />\n"; |
|
} |
|
my $part = $vars->{RESOURCE_ID_part}; |
|
if ($part eq 'All Parts' || !$part) { $part=0; } |
|
$result .= "<input type='hidden' name='psprt' value='". |
|
HTML::Entities::encode($part,"'<>&\"") . "' />\n"; |
|
|
|
$result .= '<p>'.&mt('Confirm that this information is correct, then click "Finish Helper" to complete setting the parameter.').'<ul>'; |
|
|
|
# Print the type of manipulation: |
|
my $extra; |
|
if ($vars->{ACTION_TYPE} eq 'tries') { |
|
$extra = $vars->{TRIES}; |
|
} |
|
if ($vars->{ACTION_TYPE} eq 'weight') { |
|
$extra = $vars->{WEIGHT}; |
|
} |
|
$result .= "<li>"; |
|
my $what = &mt($dateTypeHash{$vars->{ACTION_TYPE}}); |
|
if ($extra) { |
|
$result .= &mt('Setting the [_1] to [_2]',"<b>$what</b>",$extra); |
|
} else { |
|
$result .= &mt('Setting the [_1]',"<b>$what</b>"); |
|
} |
|
$result .= "</li>\n"; |
|
if ($vars->{ACTION_TYPE} eq 'due_date' || |
|
$vars->{ACTION_TYPE} eq 'answer_date') { |
|
# for due dates, we default to "date end" type entries |
|
$result .= "<input type='hidden' name='recent_date_end' " . |
|
"value='" . $vars->{PARM_DATE} . "' />\n"; |
|
$result .= "<input type='hidden' name='pres_value' " . |
|
"value='" . $vars->{PARM_DATE} . "' />\n"; |
|
$result .= "<input type='hidden' name='pres_type' " . |
|
"value='date_end' />\n"; |
|
} elsif ($vars->{ACTION_TYPE} eq 'open_date') { |
|
$result .= "<input type='hidden' name='recent_date_start' ". |
|
"value='" . $vars->{PARM_DATE} . "' />\n"; |
|
$result .= "<input type='hidden' name='pres_value' " . |
|
"value='" . $vars->{PARM_DATE} . "' />\n"; |
|
$result .= "<input type='hidden' name='pres_type' " . |
|
"value='date_start' />\n"; |
|
} elsif ($vars->{ACTION_TYPE} eq 'tries') { |
|
$result .= "<input type='hidden' name='pres_value' " . |
|
"value='" . $vars->{TRIES} . "' />\n"; |
|
$result .= "<input type='hidden' name='pres_type' " . |
|
"value='int_pos' />\n"; |
|
} elsif ($vars->{ACTION_TYPE} eq 'weight') { |
|
$result .= "<input type='hidden' name='pres_value' " . |
|
"value='" . $vars->{WEIGHT} . "' />\n"; |
|
} |
|
|
|
$result .= $resourceString; |
|
|
|
# Print targets |
|
if ($vars->{TARGETS} eq 'course') { |
|
$result .= '<li>'.&mt('for <b>all students in course</b>').'</li>'; |
|
} elsif ($vars->{TARGETS} eq 'section') { |
|
my $section = $vars->{SECTION_NAME}; |
|
$result .= '<li>'.&mt('for section [_1]',"<b>$section</b>").'</li>'; |
|
$result .= "<input type='hidden' name='csec' value='" . |
|
HTML::Entities::encode($section,"'<>&\"") . "' />\n"; |
|
} elsif ($vars->{TARGETS} eq 'group') { |
|
my $group = $vars->{GROUP_NAME}; |
|
$result .= '<li>'.&mt('for group [_1]',"<b>$group</b>").'</li>'; |
|
$result .= "<input type='hidden' name='cgroup' value='" . |
|
HTML::Entities::encode($group,"'<>&\"") . "' />\n"; |
|
} else { |
|
# FIXME: This is probably wasteful! Store the name! |
|
my $classlist = Apache::loncoursedata::get_classlist(); |
|
my ($uname,$udom)=split(':',$vars->{USER_NAME}); |
|
my $name = $classlist->{$uname.':'.$udom}->[6]; |
|
$result .= '<li>'.&mt('for [_1]',"<b>$name</b>").'</li>'; |
|
$result .= "<input type='hidden' name='uname' value='". |
|
HTML::Entities::encode($uname,"'<>&\"") . "' />\n"; |
|
$result .= "<input type='hidden' name='udom' value='". |
|
HTML::Entities::encode($udom,"'<>&\"") . "' />\n"; |
|
} |
|
|
|
# Print value |
|
if ($vars->{ACTION_TYPE} ne 'tries' && $vars->{ACTION_TYPE} ne 'weight') { |
|
$result .= '<li>'.&mt('to [_1] ([_2])',"<b>".ctime($vars->{PARM_DATE})."</b>",Apache::lonnavmaps::timeToHumanString($vars->{PARM_DATE}))."</li>\n"; |
|
} |
|
|
|
# print pres_marker |
|
$result .= "\n<input type='hidden' name='pres_marker'" . |
|
" value='$affectedResourceId&$parm_name&$level' />\n"; |
|
|
|
# Make the table appear |
|
$result .= "\n<input type='hidden' value='true' name='prevvisit' />"; |
|
$result .= "\n<input type='hidden' value='$symb' name='pssymb' />"; |
|
$result .= "\n<input type='hidden' value='$paramlevel' name='parmlev' />"; |
|
|
|
$result .= "<br /><br /><center><input type='submit' value='".&mt('Finish Helper')."' /></center></form>\n"; |
|
|
|
return $result; |
|
} |
|
|
|
sub overrideForm { |
|
return 1; |
|
} |
|
|
1; |
1; |
|
|
__END__ |
__END__ |