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# $Id: Source.pm 1179 2006-08-05 08:30:57Z warly $
package Youri::Check::Input::Updates::Source;
=head1 NAME
Youri::Check::Input::Updates::Source - Abstract updates source
=head1 DESCRIPTION
This abstract class defines the updates source interface for
L<Youri::Check::Input::Updates>.
=cut
use warnings;
use strict;
use Carp;
=head1 CLASS METHODS
=head2 new(%args)
Creates and returns a new Youri::Check::Input::Updates object.
Generic parameters (subclasses may define additional ones):
=over
=item aliases $aliases
Hash of package aliases.
=back
Warning: do not call directly, call subclass constructor instead.
=cut
sub new {
my $class = shift;
croak "Abstract class" if $class eq __PACKAGE__;
my %options = (
id => '', # object id
test => 0, # test mode
verbose => 0, # verbose mode
aliases => undef, # aliases
resolver => undef, # maintainer resolver
preferences => undef, # maintainer preferences
check_id => '', # parent check id
@_
);
if ($options{aliases}) {
croak "aliases should be an hashref" unless ref $options{aliases} eq 'HASH';
}
if ($options{resolver}) {
croak "resolver should be a Youri::Check::Maintainer::Resolver object" unless $options{resolver}->isa("Youri::Check::Maintainer::Resolver");
}
if ($options{preferences}) {
croak "preferences should be a Youri::Check::Maintainer::Preferences object" unless $options{preferences}->isa("Youri::Check::Maintainer::Preferences");
}
my $self = bless {
_id => $options{id},
_test => $options{test},
_verbose => $options{verbose},
_aliases => $options{aliases},
_resolver => $options{resolver},
_preferences => $options{preferences},
_check_id => $options{check_id},
}, $class;
$self->_init(%options);
return $self;
}
sub _init {
# do nothing
}
=head1 INSTANCE METHODS
Excepted explicit statement, package name is expressed with Mandriva naming
conventions.
=head2 get_id()
Returns source identity.
=cut
sub get_id {
my ($self) = @_;
croak "Not a class method" unless ref $self;
return $self->{_id};
}
=head2 get_version($package)
Returns available version for given package, which can be either a full
L<Youri::Package> object or just a package name.
=cut
sub get_version {
my ($self, $package) = @_;
croak "Not a class method" unless ref $self;
my $name = ref $package && $package->isa('Youri::Package') ?
$package->get_canonical_name() :
$package;
# translate in grabber namespace
$name = $self->get_name($name);
# return if aliased to null
return unless $name;
# return subclass computation
return $self->_version($name);
}
=head2 get_url($name)
Returns the URL of information source for package with given name.
=cut
sub get_url {
my ($self, $name) = @_;
# retun subclass computation
return $self->_url($self->get_name($name));
}
=head2 name($name)
Returns name converted to specific source naming conventions for package with given name.
=cut
sub get_name {
my ($self, $name) = @_;
croak "Not a class method" unless ref $self;
# return config aliases if it exists
if ($self->{_aliases} ) {
return $self->{_aliases}->{$name} if exists $self->{_aliases}->{$name};
}
# return maintainer aliases if it exists
if ($self->{_resolver} && $self->{_preferences}) {
my $maintainer = $self->{_resolver}->get_maintainer($name);
if ($maintainer) {
my $aliases = $self->{_preferences}->get_preference(
$maintainer,
$self->{_check_id},
'aliases'
);
if ($aliases) {
if ($aliases->{all}) {
return $aliases->{all}->{$name} if exists $aliases->{all}->{$name};
}
if ($aliases->{$self->{_id}}) {
return $aliases->{$self->{_id}}->{$name} if exists $aliases->{$self->{_id}}->{$name};
}
}
}
}
# return return subclass computation
return $self->_name($name);
}
=head2 _version($name)
Hook called by default B<version()> implementation after name translation.
=cut
sub _version {
my ($self, $name) = @_;
return $self->{_versions}->{$name};
}
=head2 _url($name)
Hook called by default B<url()> implementation after name translation.
=cut
sub _url {
my ($self, $name) = @_;
return undef;
}
=head2 _name($name)
Hook called by default B<name()> implementation if given name was not found in
the aliases.
=cut
sub _name {
my ($self, $name) = @_;
return $name;
}
=head1 SUBCLASSING
The following methods have to be implemented:
=over
=item version
As an alternative, the B<_version()> hook can be implemented.
=item url
As an alternative, the <_url()> hook can be implemented.
=item name
As an alternative, the B<_name()> hook can be implemented.
=back
=head1 COPYRIGHT AND LICENSE
Copyright (C) 2002-2006, YOURI project
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
=cut
1;
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