+package Packages::Page;
+
+use Deb::Versions;
+
+our $ARCHIVE_DEFAULT = '';
+our $SECTION_DEFAULT = 'main';
+our $SUBSECTION_DEFAULT = 'unknown';
+our $PRIORITY_DEFAULT = 'unknown';
+our $ESSENTIAL_DEFAULT = 'no';
+our $MAINTAINER_DEFAULT = 'unknown <unknown@email.invalid>';
+
+sub new {
+ my $classname = shift;
+ my $name = shift || '';
+ my $config = shift || {};
+
+ my $self = {};
+ bless( $self, $classname );
+
+ $self->{package} = $name;
+ $self->{config} = $config;
+
+ return $self;
+}
+
+sub merge_data {
+ my ($self, $data) = @_;
+
+ local $/ = "";
+ open DATA, '<', \$data
+ or return;
+ my $merged = 0;
+ while (<DATA>) {
+ next if /^\s*$/;
+ my %data = ();
+ chomp;
+ s/\n /\377/g;
+ while (/^(\S+):\s*(.*)\s*$/mg) {
+ my ($key, $value) = ($1, $2);
+ $value =~ s/\377/\n /g;
+ $key =~ tr [A-Z] [a-z];
+ $data{$key} = $value;
+ }
+ $merged += $self->merge_package( \%data );
+ }
+ close DATA;
+ return $merged;
+}
+
+our @TAKE_NEWEST = qw( description essential priority section subsection tags );
+our @STORE_ALL = qw( version source installed-size size filename md5sum
+ origin bugs suite archive section );
+our @DEP_FIELDS = qw( depends pre-depends recommends suggests enhances
+ provides conflicts );
+sub merge_package {
+ my ($self, $data) = @_;
+
+ ($data{package} && $data{version} && $data{architecture}) || return;
+ $self->{package} ||= $data{package};
+ ($self->{package} eq $data{package}) || return;
+
+ unless ($self->{newest}) {
+ foreach my $key (@TAKE_NEWEST) {
+ $self->{data}{$key} = $data->{$key};
+ }
+ foreach my $key (@STORE_ALL) {
+ $self->{versions}{$data->{architecture}}{$key}
+ = $data->{$key};
+ }
+ foreach my $key (@DEP_FIELDS) {
+ $self->normalize_dependencies($key, $data);
+ }
+ $self->{newest} = $data->{version};
+
+ return 1;
+ }
+
+ if (my $is_newest =
+ (version_cmp( $data->{version}, $self->{newest} ) > 0)) {
+ $self->{newest} = $data->{version};
+ foreach my $key (@TAKE_NEWEST) {
+ $self->{data}{$key} = $data->{$key};
+ }
+ }
+ if (!$self->{versions}{$data->{architecture}}
+ || $is_newest
+ || (version_cmp( $data->{version},
+ $self->{versions}{$data->{architecture}} ) > 0)) {
+ foreach my $key (@STORE_ALL) {
+ $self->{versions}{$data->{architecture}}{$key}
+ = $data->{$key};
+ }
+ foreach my $key (@DEP_FIELDS) {
+ $self->normalize_dependencies($key, $data);
+ }
+ }
+
+}
+
+sub normalize_dependencies {
+ my ($self, $dep_field, $data) = @_;
+
+ my ($deps_norm, $deps) = parse_deps( $data->{$dep_field}||'' );
+ $self->{dep_fields}{$data->{architecture}}{$dep_field} =
+ [ $deps_norm, $deps ];
+}
+
+sub parse_deps {
+ my ($dep_str) = @_;
+
+ my (@dep_and_norm, @dep_and);
+ foreach my $dep_and (split( /\s*,\s*/m, $dep_str )) {
+ next if $dep_and =~ /^\s*$/;
+ my (@dep_or_norm, @dep_or);
+ foreach my $dep_or (split( /\s*\|\s*/m, $dep_and )) {
+ my ($pkg, $relation, $version, @arches) = ('','','');
+ $pkg = $1 if $dep_or =~ s/^([a-zA-Z0-9][a-zA-Z0-9+._-]*)\s*//m;
+ ($relation, $version) = ($1, $2)
+ if $dep_or =~ s/^\(\s*(=|<=|>=|<<?|>>?)\s*([^\)]+).*\)\s*//m;
+ @arches = split(/\s+/m, $1) if $dep_or =~ s/^\[([^\]]+)\]\s*//m;
+ push @dep_or_norm, "$pkg($relation$version)[".
+ join(" ",sort(@arches))."]";
+ push @dep_or, [ $pkg, $relation, $version, \@arches ];
+ }
+ push @dep_and_norm, join('|',@dep_or_norm);
+ push @dep_and, \@dep_or;
+ }
+ return (\@dep_and_norm, \@dep_and);
+}
+
+sub get_arch_field {
+ my ($self, $field) = @_;
+
+ my @result;
+ foreach (sort keys %{$self->{versions}}) {
+ push(@result, $self->{versions}{$_}{$field})
+ if $self->{versions}{$_}{$field};
+ }
+
+ return \@result;
+}
+
+sub get_version_string {
+ my ($self) = @_;
+
+ my %versions;
+ foreach (keys %{$self->{versions}}) {
+ my $version = $self->{versions}{$_}{version};
+ $versions{$version} ||= [];
+ push @{$versions{$version}}, $_;
+ }
+
+ my @versions = version_sort keys %versions;
+ if ( scalar @versions == 1 ) {
+ @v_str = ( [ $versions[0], undef ] );
+ $v_str = $versions[0];
+ $v_str_arch = $versions[0];
+ } else {
+ my @v_str_arch;
+ foreach ( @versions ) {
+ push @v_str, [ $_, $versions{$_} ];
+ push @v_str_arch, "$_ [".join(', ', @{$versions{$_}})."]";
+ }
+ $v_str_arch = join( ", ", @v_str_arch );
+ $v_str = join( ", ", @versions );
+ }
+
+ return ($v_str, $v_str_arch, \@v_str);
+}
+
+sub get_dep_field {
+ my ($self, $dep_field) = @_;
+
+ my @architectures = ( keys %{$self->{versions}} );
+
+ my ( %dep_pkgs, %arch_deps );
+ foreach my $a ( @architectures ) {
+ next unless exists $self->{dep_fields}{$a}{$dep_field};
+ my (@a_deps_norm, @a_deps) = @{$self->{dep_fields}{$a}{$type}};
+ for ( my $i=0; $i < $#a_deps; $i++ ) { # splitted by ,
+ $dep_pkgs{$a_deps_norm[$i]} = $a_deps[$i];
+ $arch_deps{$a}{$a_deps_norm[$i]}++;
+ }
+ }
+ @architectures = sort keys %arch_deps;
+# print Dumper( \%dep_pkgs, \%arch_deps );
+
+ my @deps;
+ if ( %dep_pkgs ) {
+ my $old_pkgs = '';
+ my $is_old_pkgs = 0;
+ foreach my $dp ( sort keys %dep_pkgs ) {
+ my @dp_alts = @{$dep_pkgs{$dp}};
+ my ( @pkgs, $pkgs );
+ foreach (@dp_alts) { push @pkgs, $_->[0]; }
+ $pkgs = "@pkgs";
+
+ unless ( $is_old_pkgs = ($pkgs eq $old_pkgs) ) {
+ $old_pkgs = $pkgs;
+ }
+
+ my ($arch_neg, $arch_str) = _compute_arch_str ( $dp, \%arch_deps,
+ \@architectures );
+
+ my @res_pkgs; my $pkg_ix = 0;
+ foreach my $p_name ( @pkgs ) {
+ if ( $pkg_ix > 0 ) { $arch_str = ""; }
+
+ my $pkg_version = "";
+ $pkg_version = "$dep_pkgs{$dp}[$pkg_ix][1] $dep_pkgs{$dp}[$pkg_ix][2]"
+ if $dep_pkgs{$dp}[$pkg_ix][1];
+
+
+ push @res_pkgs, [ $p_name, $pkg_version, $arch_neg,
+ $arch_str ];
+ $pkg_ix++;
+ }
+ push @deps, [ $is_old_pkgs, @res_pkgs ];
+ }
+ }
+ return @deps;
+}
+
+sub _compute_arch_str {
+ my ( $dp, $arch_deps, $all_archs, $is_src_dep ) = @_;
+
+ my ( @dependend_archs, @not_dependend_archs );
+ my $arch_str;
+ foreach my $a ( @$all_archs ) {
+ if ( exists $arch_deps->{$a}{$dp} ) {
+ push @dependend_archs, $a;
+ } else {
+ push @not_dependend_archs, $a;
+ }
+ }
+ my $arch_neg = 0;
+ if ( @dependend_archs == @$all_archs ) {
+ $arch_str = "";
+ } else {
+ if ( @dependend_archs > (@$all_archs/2) ) {
+ $arch_neg = 1;
+ $arch_str = join( ", ", @not_dependend_archs);
+ } else {
+ $arch_str = join( ", ", @dependend_archs);
+ }
+ }
+ return my @ret = ( $arch_neg, $arch_str );
+}
+
+1;