Merge branch 'b-3.6.1' of ../kivitendo-erp_20220811

[kivitendo-erp.git] / SL / DefaultManager.pm

diff --git a/SL/DefaultManager.pm b/SL/DefaultManager.pm
new file mode 100644 (file)
index 0000000..b9940c0
--- /dev/null
+++ b/SL/DefaultManager.pm
@@ -0,0 +1,94 @@
+package SL::DefaultManager;
+
+use strict;
+
+use SL::Util qw(camelify);
+use List::Util qw(first);
+
+my %manager_cache;
+
+sub new {
+  my ($class, @defaults) = @_;
+  bless [ @defaults ], $class;
+}
+
+sub _managers {
+  my ($self) = @_;
+
+  map { $self->_get($_) } @$self;
+}
+
+sub _get {
+  my ($class, $name) = @_;
+
+  return if !$name;
+
+  $manager_cache{$name} ||= do {
+    die "'$name' doesn't look like a default manager." unless $name =~ /^\w+$/;
+
+    my $package = 'SL::DefaultManager::' . camelify($name);
+
+    eval "require $package; 1" or die "could not load default manager '$package': $@";
+
+    $package->new;
+  }
+}
+
+sub AUTOLOAD {
+  our $AUTOLOAD;
+
+  my ($self, @args) = @_;
+
+  my $method        =  $AUTOLOAD;
+  $method           =~ s/.*:://;
+  return if $method eq 'DESTROY';
+
+  my $manager = first { $_->can($method) } $self->_managers;
+
+  return $manager ? $manager->$method : @args;
+}
+
+1;
+
+__END__
+
+=encoding utf-8
+
+=head1 NAME
+
+SL::DefaultManager - sets of defaults for use outside of clients
+
+=head1 SYNOPSIS
+
+  # during startup
+  my $defaults = SL::DefaultManager->new($::lx_office_conf{default_manager});
+
+  # during tests
+  my $defaults = SL::DefaultManager->new('swiss');
+
+  # in consuming code
+  # will return what the manager provides, or the given value if $defaults does
+  # not handle dateformat
+  my $dateformat = $defaults->dateformat('dd.mm.yyyy');
+
+  # have several default managers for different tasks
+  # if polled the first defined response will win
+  my $defaults = SL::DefaultManager->new('swiss', 'mobile', 'point_of_sale');
+
+=head1 DESCRIPTION
+
+TODO
+
+=head1 FUNCTIONS
+
+TODO
+
+=head1 BUGS
+
+None yet :)
+
+=head1 AUTHOR
+
+Sven Schöling E<lt>s.schoeling@linet-services.deE<gt>
+
+=cut