117 lines
3 KiB
Perl
117 lines
3 KiB
Perl
package WebGUI::Form::Captcha;
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=head1 LEGAL
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-------------------------------------------------------------------
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WebGUI is Copyright 2001-2006 Plain Black Corporation.
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-------------------------------------------------------------------
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Please read the legal notices (docs/legal.txt) and the license
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(docs/license.txt) that came with this distribution before using
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this software.
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-------------------------------------------------------------------
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http://www.plainblack.com info@plainblack.com
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-------------------------------------------------------------------
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=cut
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use strict;
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use base 'WebGUI::Form::Text';
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use WebGUI::International;
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use WebGUI::Storage::Image;
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=head1 NAME
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Package WebGUI::Form::Captcha
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=head1 DESCRIPTION
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Creates a captcha form element that helps verify a human is submitting the form rather than a bot.
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=head1 SEE ALSO
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This is a subclass of WebGUI::Form::Text.
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=head1 METHODS
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The following methods are specifically available from this class. Check the superclass for additional methods.
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=cut
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#-------------------------------------------------------------------
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=head2 definition ( [ additionalTerms ] )
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See the super class for additional details.
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=head3 additionalTerms
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The following additional parameters have been added via this sub class.
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=head3 label
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Defaults to "Verify Your Humanity"
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=head4 profileEnabled
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Flag that tells the User Profile system that this is a valid form element in a User Profile
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=cut
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sub definition {
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my $class = shift;
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my $session = shift;
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my $definition = shift || [];
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my $i18n = WebGUI::International->new($session,"Form_Captcha");
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push(@{$definition}, {
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formName=>{
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defaultValue=>$i18n->get("topicName")
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},
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label => {
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defaultValue=>$i18n->get("verify your humanity")
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},
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profileEnabled=>{
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defaultValue=>0
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},
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dbDataType => {
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defaultValue => "VARCHAR(6)",
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},
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});
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return $class->SUPER::definition($session, $definition);
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}
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#-------------------------------------------------------------------
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=head2 getValueFromPost ( )
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Returns a boolean indicating whether the string typed matched the image.
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=cut
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sub getValueFromPost {
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my $self = shift;
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my $value = $self->session->form->param($self->get("name"));
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my $challenge = $self->session->scratch->get("captcha_".$self->get("name"));
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$self->session->scratch->delete("captcha_".$self->get("name"));
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return (lc($value) eq lc($challenge));
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}
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#-------------------------------------------------------------------
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=head2 toHtml ( )
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Renders a captcha field.
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=cut
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sub toHtml {
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my $self = shift;
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my $storage = WebGUI::Storage::Image->createTemp($self->session);
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my ($filename, $challenge) = $storage->addFileFromCaptcha;
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$self->set("size", 6);
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$self->set("maxlength", 6);
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$self->session->scratch->set("captcha_".$self->get("name"), $challenge);
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return $self->SUPER::toHtml.'<p style="display:inline;vertical-align:middle;"><img src="'.$storage->getUrl($filename).'" style="border-style:none;vertical-align:middle;" alt="captcha" /></p>';
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}
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1;
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