120 lines
3.1 KiB
Perl
120 lines
3.1 KiB
Perl
package RevBank::Cart;
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use v5.28;
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use warnings;
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use feature qw(signatures);
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no warnings qw(experimental::signatures);
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use Carp ();
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use List::Util ();
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use RevBank::Global;
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use RevBank::Users;
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use RevBank::Cart::Entry;
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sub new($class) {
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return bless { entries => [] }, $class;
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}
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sub add_entry($self, $entry) {
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RevBank::Plugins::call_hooks("add_entry", $self, $entry);
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push @{ $self->{entries} }, $entry;
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$self->{changed}++;
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RevBank::Plugins::call_hooks("added_entry", $self, $entry);
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return $entry;
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}
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sub add($self, $amount, $description, $data = {}) {
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Carp::croak "Unitialized amount; possibly a deprecated call style (\$cart->add(undef, ...))"
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if not defined $amount;
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Carp::croak "Non-hash data argument; possibly a deprecated call style (\$cart->add(\$user, ...)"
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if @_ == 4 and not ref $data;
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Carp::croak "Missing description; possibly a deprecated call style (\$cart->add(\$entry); use add_entry instead)"
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if not defined $description;
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return $self->add_entry(RevBank::Cart::Entry->new($amount, $description, $data));
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}
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sub delete($self, $entry) {
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my $entries = $self->{entries};
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my $oldnum = @$entries;
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@$entries = grep $_ != $entry, @$entries;
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$self->{changed}++;
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return $oldnum - @$entries;
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}
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sub empty($self) {
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$self->{entries} = [];
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$self->{changed}++;
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}
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sub display($self, $prefix = "") {
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say "$prefix$_" for map $_->as_printable, @{ $self->{entries} };
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}
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sub size($self) {
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return scalar @{ $self->{entries} };
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}
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sub checkout($self, $user) {
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if ($self->entries('refuse_checkout')) {
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warn "Refusing to finalize deficient transaction.\n";
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$self->display;
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return;
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}
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$user = RevBank::Users::assert_user($user);
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my $entries = $self->{entries};
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my %deltas;
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for my $entry (@$entries) {
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$entry->user($user);
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$deltas{$entry->{user}} //= RevBank::Amount->new(0);
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$deltas{$_->{user}} += $_->{amount} * $entry->quantity
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for $entry, $entry->contras;
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}
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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 $account (reverse sort keys %deltas) {
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# The reverse sort is a lazy way to make the "-" accounts come last,
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# which looks nicer with the "cash" plugin.
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RevBank::Users::update($account, $deltas{$account}, $transaction_id)
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if $deltas{$account} != 0;
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}
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RevBank::Plugins::call_hooks("checkout_done", $self, $user, $transaction_id);
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$self->empty;
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sleep 1; # Ensure new timestamp/id for new transaction
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return 1;
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}
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sub entries($self, $attribute = undef) {
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my @entries = @{ $self->{entries} };
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return grep $_->has_attribute($attribute), @entries if defined $attribute;
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return @entries;
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}
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sub changed($self) {
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my $changed = 0;
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for my $entry ($self->entries('changed')) {
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$entry->attribute('changed', undef);
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$changed = 1;
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}
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$changed = 1 if delete $self->{changed};
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return $changed;
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}
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sub sum($self) {
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return List::Util::sum(map $_->{amount} * $_->quantity, @{ $self->{entries} });
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}
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1;
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