122 lines
2.7 KiB
Perl
122 lines
2.7 KiB
Perl
package RevBank::Cart;
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use strict;
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use Carp ();
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use List::Util ();
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use RevBank::Global;
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# Some code is written with the assumption that the card will only grow or
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# be emptied. Changing existing stuff or removing items is probably not a
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# good idea, and may lead to inconsistency.
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sub new {
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my ($class) = @_;
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return bless { }, $class;
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}
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sub add {
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my ($self, $user, $amount, $description) = @_;
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$user ||= '$you';
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push @{ $self->{ $user } }, {
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amount => $amount,
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description => $description,
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};
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}
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sub empty {
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my ($self) = @_;
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%$self = ();
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}
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sub _dump_item {
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my ($prefix, $user, $amount, $description) = @_;
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return sprintf(
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"%s%-17s %4s EUR %5.2f %s",
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$prefix,
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$user,
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($amount > 0 ? 'GAIN' : $amount < 0 ? 'LOSE' : ''),
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abs($amount),
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$description
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);
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}
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sub as_strings {
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my ($self, $prefix) = @_;
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$prefix ||= ' ';
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my @s;
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for my $user (sort keys %$self) {
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my @items = @{ $self->{$user} };
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my $sum = List::Util::sum(map $_->{amount}, @items);
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push @s, _dump_item($prefix, $user, $_->{amount}, "# $_->{description}")
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for @items;
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push @s, _dump_item($prefix, $user, $sum, "TOTAL")
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if @items > 1;
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}
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return @s;
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}
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sub display {
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my ($self, $prefix) = @_;
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say $_ for $self->as_strings($prefix);
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}
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sub size {
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my ($self) = @_;
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return List::Util::sum(map scalar @{ $self->{$_} }, keys %$self) || 0;
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}
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sub _set_user {
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my ($self, $user) = @_;
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exists $self->{'$you'}
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or Carp::croak("Error: no cart items for shell user");
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$self->{$user} ||= [];
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push @{ $self->{$user} }, @{ delete $self->{'$you'} };
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for (values %$self) {
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$_->{description} =~ s/\$you\b/$user/g for @$_;
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}
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}
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sub checkout {
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my ($self, $user) = @_;
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$self->_set_user($user) if $user;
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exists $self->{'$you'} and die "Incomplete transaction; user not set.";
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my $transaction_id = time() - 1300000000;
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RevBank::Plugins::call_hooks("checkout", $self, $user, $transaction_id);
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for my $account (keys %$self) {
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my $sum = List::Util::sum(map $_->{amount}, @{ $self->{$account} });
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RevBank::Users::update($account, $sum, $transaction_id);
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}
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$self->empty;
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sleep 1; # Ensure new timestamp/id for new transaction
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}
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sub select_items {
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my ($self, $regex) = @_;
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$regex ||= qr/(?:)/; # Match everything if no regex is given
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my @matches;
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for my $user (keys %$self) {
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for my $item (@{ $self->{$user} }) {
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push @matches, { user => $user, %$item }
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if $item->{description} =~ /$regex/;
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}
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}
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return @matches;
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}
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1;
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