Initial Commit

database/perl/vendor/lib/CPANPLUS/Internals/Source/SQLite/Tie.pm

@@ -0,0 +1,142 @@
+package CPANPLUS::Internals::Source::SQLite::Tie;
+
+use strict;
+use warnings;
+
+use CPANPLUS::Error;
+use CPANPLUS::Module;
+use CPANPLUS::Module::Fake;
+use CPANPLUS::Module::Author::Fake;
+use CPANPLUS::Internals::Constants;
+
+use Params::Check               qw[check];
+use Module::Load::Conditional   qw[can_load];
+use Locale::Maketext::Simple    Class => 'CPANPLUS', Style => 'gettext';
+
+use vars qw[@ISA $VERSION];
+$VERSION = "0.9910";
+
+require Tie::Hash;
+push @ISA, 'Tie::StdHash';
+
+
+sub TIEHASH {
+    my $class = shift;
+    my %hash  = @_;
+
+    my $tmpl = {
+        dbh     => { required => 1 },
+        table   => { required => 1 },
+        key     => { required => 1 },
+        cb      => { required => 1 },
+        offset  => { default  => 0 },
+    };
+
+    my $args = check( $tmpl, \%hash ) or return;
+    my $obj  = bless { %$args, store => {} } , $class;
+
+    return $obj;
+}
+
+sub FETCH {
+    my $self    = shift;
+    my $key     = shift or return;
+    my $dbh     = $self->{dbh};
+    my $cb      = $self->{cb};
+    my $table   = $self->{table};
+
+
+    ### did we look this one up before?
+    if( my $obj = $self->{store}->{$key} ) {
+        return $obj;
+    }
+
+    my $res  = $dbh->query(
+                    "SELECT * from $table where $self->{key} = ?", $key
+                ) or do {
+                    error( $dbh->error );
+                    return;
+                };
+
+    my $href = $res->hash;
+
+    ### get rid of the primary key
+    delete $href->{'id'};
+
+    ### no results?
+    return unless keys %$href;
+
+    ### expand author if needed
+    ### XXX no longer generic :(
+    if( $table eq 'module' ) {
+        $href->{author} = $cb->author_tree( $href->{author } ) or return;
+    }
+
+    my $class = {
+        module  => 'CPANPLUS::Module',
+        author  => 'CPANPLUS::Module::Author',
+    }->{ $table };
+
+    my $obj = $self->{store}->{$key} = $class->new( %$href, _id => $cb->_id );
+
+    return $obj;
+}
+
+sub STORE {
+    my $self = shift;
+    my $key  = shift;
+    my $val  = shift;
+
+    $self->{store}->{$key} = $val;
+}
+
+1;
+
+sub FIRSTKEY {
+    my $self = shift;
+    my $dbh  = $self->{'dbh'};
+
+    my $res  = $dbh->query(
+                    "select $self->{key} from $self->{table} order by $self->{key} limit 1"
+               );
+
+    $self->{offset} = 0;
+
+    my $key = $res->flat->[0];
+
+    return $key;
+}
+
+sub NEXTKEY {
+    my $self = shift;
+    my $dbh  = $self->{'dbh'};
+
+    my $res  = $dbh->query(
+                    "select $self->{key} from $self->{table} ".
+                    "order by $self->{key} limit 1 offset $self->{offset}"
+               );
+
+    $self->{offset} +=1;
+
+    my $key = $res->flat->[0];
+    my $val = $self->FETCH( $key );
+
+    ### use each() semantics
+    return wantarray ? ( $key, $val ) : $key;
+}
+
+sub EXISTS   { !!$_[0]->FETCH( $_[1] ) }
+
+sub SCALAR   {
+    my $self = shift;
+    my $dbh  = $self->{'dbh'};
+
+    my $res  = $dbh->query( "select count(*) from $self->{table}" );
+
+    return $res->flat;
+}
+
+### intentionally left blank
+sub DELETE   {  }
+sub CLEAR    {  }
+