236 lines
5.2 KiB
Perl
236 lines
5.2 KiB
Perl
package WebGUI::Session::Scratch;
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=head1 LEGAL
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-------------------------------------------------------------------
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WebGUI is Copyright 2001-2009 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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=head1 NAME
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Package WebGUI::Session::Scratch
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=head1 DESCRIPTION
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This package allows you to attach arbitrary data to the session that lasts until the session dies.
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=head1 SYNOPSIS
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$scratch = WebGUI::Session::Scratch->new($session);
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$scratch->delete('temp');
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$scratch->set('temp',$value);
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$value = $scratch->get('temp');
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$scratch->deleteAll;
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$scratch->deleteName('temp');
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=head1 METHODS
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These methods are available from this package:
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=cut
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#-------------------------------------------------------------------
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=head2 delete ( name )
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Deletes a scratch variable. Returns the value of the deleted variable for
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convenience, or undef if the variable was not defined.
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=head3 name
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The name of the scratch variable.
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=cut
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sub delete {
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my $self = shift;
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my $name = shift;
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return undef unless ($name);
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my $value = delete $self->{_data}{$name};
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my $session = $self->session;
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my $id = $session->getId;
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eval{$session->cache->set(["sessionscratch",$id], $self->{_data}, $session->setting->get('sessionTimeout'))};
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$session->db->write("delete from userSessionScratch where name=? and sessionId=?", [$name, $id]);
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return $value;
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}
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#-------------------------------------------------------------------
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=head2 deleteAll ( )
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Deletes all scratch variables for this session.
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=cut
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sub deleteAll {
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my $self = shift;
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delete $self->{_data};
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my $session = $self->session;
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my $id = $session->getId;
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eval{$session->cache->delete(["sessionscratch",$id])};
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$session->db->write("delete from userSessionScratch where sessionId=?", [$id]);
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}
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#-------------------------------------------------------------------
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=head2 deleteName ( name )
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Deletes a scratch variable for all users. This function must be used with care.
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=head3 name
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The name of the scratch variable.
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=cut
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sub deleteName {
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my $self = shift;
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my $name = shift;
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return undef unless ($name);
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delete $self->{_data}{$name};
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my $session = $self->session;
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eval{$session->cache->flush};
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$session->db->write("delete from userSessionScratch where name=?", [$name]);
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}
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#-------------------------------------------------------------------
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=head2 deleteNameByValue ( name, value )
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Deletes a scratch variable for all users where a particular name equals a particular value. This function must be used with care.
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=head3 name
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The name of the scratch variable.
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=head3 value
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The value to match. This can be anything except for undef.
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=cut
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sub deleteNameByValue {
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my $self = shift;
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my $name = shift;
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my $value = shift;
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return undef unless ($name and defined $value);
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delete $self->{_data}{$name} if ($self->{_data}{$name} eq $value);
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my $session = $self->session;
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eval{$session->cache->flush};
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$session->db->write("delete from userSessionScratch where name=? and value=?", [$name,$value]);
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}
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#-------------------------------------------------------------------
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=head2 DESTROY ( )
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Deconstructor.
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=cut
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sub DESTROY {
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my $self = shift;
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undef $self;
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}
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#-------------------------------------------------------------------
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=head2 get( varName )
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Retrieves the current value of a scratch variable.
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=head3 varName
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The name of the variable.
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=cut
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sub get {
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my ($self, $var) = @_;
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return $self->{_data}{$var};
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}
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#-------------------------------------------------------------------
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=head2 new ( session )
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Constructor. Returns a scratch object.
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=head3 session
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The current session.
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=cut
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sub new {
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my ($class, $session) = @_;
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my $scratch = eval{$session->cache->get(["sessionscratch",$session->getId])};
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unless (ref $scratch eq "HASH") {
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$scratch = $session->db->buildHashRef("select name,value from userSessionScratch where sessionId=?",[$session->getId], {noOrder => 1});
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}
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bless {_session=>$session, _data=>$scratch}, $class;
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}
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#-------------------------------------------------------------------
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=head2 session ( )
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Returns a reference to the WebGUI::Session object.
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=cut
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sub session {
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my $self = shift;
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return $self->{_session};
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}
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#-------------------------------------------------------------------
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=head2 set ( name, value )
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Sets a scratch variable for this user session.
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=head3 name
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The name of the scratch variable.
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=head3 value
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The value of the scratch variable. Must be a string no longer than 16000 characters.
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=cut
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sub set {
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my ($self, $name, $value) = @_;
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return undef unless ($name);
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$self->{_data}{$name} = $value;
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my $session = $self->session;
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my $id = $session->getId;
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eval{$session->cache->set(["sessionscratch",$id], $self->{_data}, $session->setting->get('sessionTimeout'))};
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$session->db->write("replace into userSessionScratch (sessionId, name, value) values (?,?,?)", [$id, $name, $value]);
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}
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1;
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