X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FDeploymentHandler%2FVersionHandler%2FExplicitVersions.pm;fp=lib%2FDBIx%2FClass%2FDeploymentHandler%2FVersionHandler%2FExplicitVersions.pm;h=6566de70cc8c08a3ea43f519d3ca70b12343c84b;hb=c703d15de5286961942f33cdeff6ad978c90d3de;hp=0000000000000000000000000000000000000000;hpb=8a7847f1b8a8ca910d43db22eea85d321b1602c3;p=dbsrgits%2FDBIx-Class-DeploymentHandler.git

diff --git a/lib/DBIx/Class/DeploymentHandler/VersionHandler/ExplicitVersions.pm b/lib/DBIx/Class/DeploymentHandler/VersionHandler/ExplicitVersions.pm
new file mode 100644
index 0000000..6566de7
--- /dev/null
+++ b/lib/DBIx/Class/DeploymentHandler/VersionHandler/ExplicitVersions.pm
@@ -0,0 +1,67 @@
+package DBIx::Class::DeploymentHandler::VersionHandler::ExplicitVersions;
+use Moose;
+use Method::Signatures::Simple;
+use Carp 'croak';
+
+with 'DBIx::Class::DeploymentHandler::HandlesVersioning';
+
+has ordered_versions => (
+  is       => 'ro',
+  isa      => 'ArrayRef',
+  required => 1,
+  trigger  => sub {
+    my $to_version = $_[0]->to_version;
+    my $db_version = $_[0]->db_version;
+
+    croak 'to_version not in ordered_versions'
+      unless grep { $to_version eq $_ } @{ $_[1] };
+
+    for (@{ $_[1] }) {
+      return if $_ eq $db_version;
+      croak 'to_version is before database version in ordered_versions'
+        if $_ eq $to_version;
+    }
+  },
+);
+
+has _version_idx => (
+  is         => 'rw',
+  isa        => 'Int',
+  lazy_build => 1,
+);
+
+method _inc_version_idx { $self->_version_idx($self->_version_idx + 1 ) }
+
+method _build__version_idx {
+  my $start = $self->version_rs->db_version;
+  my $idx = 0;
+  for (@{$self->ordered_versions}) {
+    return $idx
+      if $_ eq $self->db_version;
+    $idx++;
+  }
+  croak 'database version not found in ordered_versions!';
+}
+
+sub next_version_set { # sub instead of method because of when roles get composed
+  my $self = shift;
+  return undef
+    if $self->ordered_versions->[$self->_version_idx] eq $self->to_version;
+  my $next_idx = $self->_inc_version_idx;
+  if ( $next_idx <= $#{ $self->ordered_versions }) {
+    return [
+      $self->ordered_versions->[$next_idx - 1],
+      $self->ordered_versions->[$next_idx    ],
+    ]
+  } else {
+    return undef
+  }
+}
+
+__PACKAGE__->meta->make_immutable;
+
+1;
+
+__END__
+
+vim: ts=2 sw=2 expandtab