293 lines
6.6 KiB
Perl
293 lines
6.6 KiB
Perl
package WebGUI::DatabaseLink;
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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 Tie::CPHash;
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use WebGUI::International;
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=head1 NAME
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Package WebGUI::DatabaseLink
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=head1 DESCRIPTION
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This package contains utility methods for WebGUI's database link system.
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=head1 SYNOPSIS
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use WebGUI::DatabaseLink;
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$hashRef = WebGUI::DatabaseLink->getList($session);
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$dbLink = WebGUI::DatabaseLink->new($session,$databaseLinkId);
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$dbh = $dbLink->db;
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$dbLink->disconnect;
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$session = $dbLink->session;
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=head1 METHODS
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These subroutines are available from this package:
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=cut
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#-------------------------------------------------------------------
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=head2 copy ( )
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Returns a new database link id, after copying the properties of this database link to a new entry.
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=cut
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sub copy {
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my $self = shift;
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my %params = %{$self->{_databaseLink}};
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$params{databaseLinkId} = "new";
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return $self->session->db->setRow("databaseLink","databaseLinkId",\%params);
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}
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#-------------------------------------------------------------------
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=head2 create ( session, params)
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Constructor. Creates a new database link based upon the passed in params and returns a reference to the database link.
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=head3 session
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A reference to the current session.
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=head3 params
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A hash reference containing the list of params to set. See the set() method for details.
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=cut
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sub create {
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my $class = shift;
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my $session = shift;
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my $params = shift;
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$params->{databaseLinkId} = "new";
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my $id = $session->db->setRow("databaseLink","databaseLinkId",$params);
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return $class->new($session,$id);
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}
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#-------------------------------------------------------------------
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=head3 delete ( )
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Deletes the current database link.
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=cut
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sub delete {
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my $self = shift;
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$self->session->db->deleteRow("databaseLink","databaseLinkId",$self->getId) unless ($self->getId eq "0");
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$self->disconnect;
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}
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#-------------------------------------------------------------------
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=head2 disconnect ( )
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Disconnect cleanly from the current databaseLink. You should always use this method rather than the disconnect method of the actual WebGUI::SQL database handle otherwise you may accidentally close the database handle to the WebGUI database prematurely.
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=cut
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sub disconnect {
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my ($self, $value);
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$self = shift;
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$value = shift;
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if (defined $self->{_dbh}) {
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$self->{_dbh}->disconnect() unless ($self->getId eq "0");
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}
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undef $self;
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}
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#-------------------------------------------------------------------
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=head2 db ( )
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Return a WebGUI::SQL database handle for the current databaseLink, connecting if necessary.
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=cut
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sub db {
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my $self = shift;
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my $value = shift;
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if (defined $self->{_dbh}) {
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return $self->{_dbh};
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}
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my $dsn = $self->{_databaseLink}{DSN};
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my $username = $self->{_databaseLink}{username};
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my $identifier = $self->{_databaseLink}{identifier};
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if ($self->getId eq "0") {
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$self->{_dbh} = $self->session->db;
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return $self->{_dbh};
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} elsif ($dsn =~ /\DBI\:\w+\:\w+/i) {
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eval{
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$self->{_dbh} = WebGUI::SQL->connect($self->session,$dsn,$username,$identifier);
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};
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if ($@) {
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$self->session->errorHandler->warn("DatabaseLink [".$self->getId."] ".$@);
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} else {
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return $self->{_dbh};
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}
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} else {
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$self->session->errorHandler->warn("DatabaseLink [".$self->getId."] The DSN specified is of an improper format.");
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}
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return undef;
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}
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#-------------------------------------------------------------------
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=head2 get ( )
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Returns the properties of this database link as a hash reference.
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=cut
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sub get {
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my $self = shift;
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$self->{_databaseLink};
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}
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#-------------------------------------------------------------------
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=head2 getId ( )
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Returns the ID of this database link.
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=cut
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sub getId {
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my $self = shift;
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$self->{_databaseLink}{databaseLinkId};
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}
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#-------------------------------------------------------------------
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=head2 getList ( session )
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Class method. Returns a hash reference containing all database links. The format is:
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databaseLinkId => title
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=head3 session
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A reference to the current session.
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=cut
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sub getList {
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my $class = shift;
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my $session = shift;
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my $list = $session->db->buildHashRef("select databaseLinkId, title from databaseLink order by title");
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my $i18n = WebGUI::International->new($session);
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$list->{'0'} = $i18n->get(1076);
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return $list;
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}
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#-------------------------------------------------------------------
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=head2 new ( session, databaseLinkId )
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Constructor.
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=head3 session
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A reference to the current session.
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=head3 databaseLinkId
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The databaseLinkId of the databaseLink you're creating an object reference for.
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=cut
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sub new {
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my ($class, $databaseLinkId, %databaseLink);
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tie %databaseLink, 'Tie::CPHash';
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$class = shift;
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my $session = shift;
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$databaseLinkId = shift;
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unless ($databaseLinkId eq "") {
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if ($databaseLinkId eq "0") {
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%databaseLink = (
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databaseLinkId=>"0",
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DSN=>$session->config->get("dsn"),
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username=>$session->config->get("dbuser"),
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identifier=>$session->config->get("dbpass"),
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title=>"WebGUI Database"
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);
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} else {
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%databaseLink = $session->db->quickHash("select * from databaseLink where databaseLinkId=".$session->db->quote($databaseLinkId));
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}
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}
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return undef unless $databaseLink{databaseLinkId};
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bless {_session=>$session, _databaseLink => \%databaseLink }, $class;
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}
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#-------------------------------------------------------------------
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=head2 session
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Returns a reference to the current session.
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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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=head3 set ( params )
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Updates the parameters of this database link.
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=head3 params
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A hash reference containing the parameters to set.
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=head4 DSN
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The database service name, which follows the perl DBI DSN structure. DBI:dbtype:dbname;otherparams
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=head4 username
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THe username to connect to the database with.
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=head4 identifier
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The password to connect to the database with.
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=head4 title
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A text label to identify this database to humans in the UI.
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=cut
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sub set {
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my $self = shift;
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my $params = shift;
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$params->{databaseLinkId} = $self->getId;
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$self->session->db->setRow("databaseLink","databaseLinkId",$params);
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}
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1;
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