v3.6: products overhaul
New features, new documentation.
This commit is contained in:
Juerd Waalboer
parent
e748566913
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da523f8daa
7 changed files with 296 additions and 35 deletions
79
UPGRADING.md
79
UPGRADING.md
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@ -1,3 +1,82 @@
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# (2022-12-25) RevBank 3.6
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## Update your `revbank.plugins`
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The `edit` command is now in its own plugin, so that it can be disabled (this
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has been requested several times). To keep the ability to edit the products
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list from within RevBank, add `edit` to `revbank.plugins`.
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## Check your `revbank.products`
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There's new syntax for `revbank.products`: addons. Check that your lines don't
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have `+foo` at the end, where `foo` can be anything.
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Also check that you don't have any product ids that start with `+`; those can
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no longer be entered as this syntax now has special semantics.
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So these don't work as before:
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example_id 1.00 Example product +something
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+something 1.00 Product id that starts with plus
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example,+alias 1.00 Alias that starts with plus
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These will keep working as they were:
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example_id1 1.00 Example product+something
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example_id2 1.00 Example product + something
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more_stuff 1.00 Example product with +something but not at the end
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bbq 1.00 3+ pieces of meat
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## New features in `products` plugin
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There are several new features that you may wish to take advantage of. By
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combining the new features, powerful things can be done that previously
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required custom plugins.
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The syntax for `revbank.products` has become complex. Please refer to the new
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documentation in [products.pod](plugins/products.pod) for details.
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### Negative prices (add money to account)
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Support for non-positive prices was requested several times over the years and
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has now finally been implemented.
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It's now possible to have a product with a negative amount, which when "bought"
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will cause the user to receive money instead of spending it.
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### Product addons
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It is now possible to add products to products, which is done by specifying
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`+foo` at the end of a product description, where `foo` is the id of another
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product. This can be used for surcharges and discounts, or for bundles of
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products that can also be bought individually.
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### Eplicit contra accounts
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By default, products sold via the `products` plugin, are accounted on the
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`+sales/products` contra account. This can now be overridden by specifying
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`@accountname` after the price in `revbank.products`. For example,
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`1.00@+sales/products/specificcategory`. While this will mess up your tidy
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columns, you may be able to get rid of a bunch of custom plugins now.
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When the specified contra account is a regular account (does not start with `+`
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or `-`), this works similar to the `market` plugin, but without any commission
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for the organization.
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## Pfand plugin: gone
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The `pfand` plugin, that was originally written as a proof-of-concept demo, has
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been removed without deprecation cycle. To my knowledge, nobody uses this
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plugin. If you did use it, just grab the old version from git. Please let me
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know about your usecase!
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The introduction of beverage container deposits in The Netherlands has
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triggered reevaluation, and several things about that plugin were wrong,
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including the condescending comments that bottle deposits for small bottles
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would be crazy or wouldn't make sense in a self-service environment. RevBank
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was too limited to support it properly, but I think current RevBank fulfills
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all requirements for making a better, proper pfand plugin.
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# (2022-08-30) RevBank 3.5
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RevBank now has a simple built-in text editor for products and market;
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@ -18,7 +18,7 @@ sub new($class, $amount, $description, $attributes = {}) {
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description => $description,
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attributes => { %$attributes },
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user => undef,
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contras => [],
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contras => [], # infos + contras
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caller => List::Util::first(sub { !/^RevBank::Cart/ }, map { (caller $_)[3] } 1..10)
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|| (caller 1)[3],
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};
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@ -43,6 +43,22 @@ sub add_contra($self, $user, $amount, $description) {
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return $self; # for method chaining
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}
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sub add_info($self, $amount, $description) {
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$amount = RevBank::Amount->parse_string($amount) if not ref $amount;
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$description =~ s/\$you/$self->{user}/g if defined $self->{user};
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push @{ $self->{contras} }, {
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user => undef,
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amount => $amount, # should usually have SAME sign (+/-)
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description => $description,
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};
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$self->attribute('changed', 1);
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return $self; # for method chaining
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}
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sub has_attribute($self, $key) {
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return (
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exists $self->{attributes}->{$key}
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@ -73,7 +89,7 @@ sub multiplied($self) {
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sub contras($self) {
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# Shallow copy suffices for now, because there is no depth.
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return map +{ %$_ }, @{ $self->{contras} };
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return map +{ %$_ }, grep defined $_->{user}, @{ $self->{contras} };
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}
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sub as_printable($self) {
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@ -85,16 +101,19 @@ sub as_printable($self) {
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# positive numbers.
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push @s, sprintf "%8s %s", $self->{amount}->string_flipped, $self->{description};
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for my $c ($self->contras) {
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next if RevBank::Users::is_hidden($c->{user}) and not $ENV{REVBANK_DEBUG};
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for my $c (@{ $self->{contras} }) {
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my $description;
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if (defined $c->{user}) {
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next if RevBank::Users::is_hidden($c->{user}) and not $ENV{REVBANK_DEBUG};
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$description = join " ", ($c->{amount}->cents > 0 ? "->" : "<-"), $c->{user};
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} else {
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$description = $c->{description};
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}
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push @s, sprintf(
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"%11s %s %s",
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$c->{amount}->abs->string,
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($c->{amount}->cents > 0 ? "->" : "<-"),
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$c->{user}
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"%11s %s",
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($self->{amount} > 0 ? $c->{amount}->string_flipped("") : $c->{amount}->string),
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$description
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);
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}
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push @s, "}" if $self->multiplied;
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@ -109,6 +128,7 @@ sub as_loggable($self) {
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my @s;
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for ($self, @{ $self->{contras} }) {
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next if not defined $_->{user};
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my $total = $quantity * $_->{amount};
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my $description =
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13
plugins/edit
Normal file
13
plugins/edit
Normal file
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@ -0,0 +1,13 @@
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#!perl
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HELP "edit" => "Edit product list";
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my $filename = 'revbank.products';
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sub command :Tab(edit) ($self, $cart, $command, @) {
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$command eq 'edit' or return NEXT;
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require RevBank::TextEditor;
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RevBank::TextEditor::edit($filename);
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return ACCEPT;
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}
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109
plugins/products
109
plugins/products
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@ -1,36 +1,58 @@
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#!perl
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HELP1 "<productID>" => "Add a product to pending transaction";
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HELP "edit" => "Edit product list";
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my $filename = 'revbank.products';
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sub _read_products() {
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my %products;
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my $line = 0;
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for (slurp $filename) {
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$line++;
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/^\s*#/ and next;
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/\S/ or next;
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chomp;
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my ($ids, $p, $d) = split " ", $_, 3;
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my ($ids, $p, $desc) = split " ", $_, 3;
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my @ids = split /,/, $ids;
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$products{ $_ } = { id => $ids[0], price => $p, description => $d}
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for @ids;
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$p ||= "invalid";
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$desc ||= "(no description)";
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my ($price, $contra) = split /\@/, $p, 2;
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my $sign = $price =~ s/^-// ? -1 : 1;
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$price = eval { parse_amount($price) };
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if (not defined $price) {
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warn "Invalid price for '$ids[0]' at $filename line $line.\n";
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next;
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}
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my @addons;
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unshift @addons, $1 while $desc =~ s/\s+ \+ (\S+) \s*$//x;
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$products{$_} = {
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id => $ids[0],
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price => $sign * $price,
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description => $desc,
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contra => $contra || '+sales/products',
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addons => \@addons,
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line => $line,
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} for @ids;
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}
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return \%products;
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}
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sub command :Tab(edit,&tab) ($self, $cart, $command, @) {
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if ($command eq 'edit') {
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require RevBank::TextEditor;
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RevBank::TextEditor::edit($filename);
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return ACCEPT;
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}
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sub command :Tab(&tab) ($self, $cart, $command, @) {
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$command =~ /\S/ or return NEXT;
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$command =~ /^\+/ and return NEXT;
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my $product = _read_products->{ $command } or return NEXT;
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my $price = parse_amount( $product->{price} ) or return NEXT;
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my $products = _read_products;
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my $product = $products->{ $command } or return NEXT;
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my $price = $product->{price};
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my @existing = grep {
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$_->attribute('plugin') eq $self->id and
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@ -42,17 +64,56 @@ sub command :Tab(edit,&tab) ($self, $cart, $command, @) {
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return ACCEPT;
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}
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$cart
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->add(
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-$price,
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$product->{description},
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{ product_id => $product->{id}, plugin => $self->id }
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)
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->add_contra(
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"+sales/products",
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+$price,
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"\$you bought $product->{description}"
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);
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my $total = $price;
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my $contra_desc = "\$you bought $product->{description}";
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my @addons = @{ $product->{addons} };
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my @infos = @addons ? (
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$price->cents > 0 ? ([ $price, "Product" ])
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: $price->cents < 0 ? ([ $price, "Reimbursement" ])
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: () # price == 0: only addons
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) : ();
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my @contras;
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my %ids_seen = ($product->{id} => 1);
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while (my $addon_id = shift @addons) {
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$addon_id = "+$addon_id" if exists $products->{"+$addon_id"};
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if ($ids_seen{$addon_id}++) {
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return REJECT, "Infinite addons are not supported.";
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}
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my $addon = $products->{$addon_id}
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or return REJECT, "Addon '$addon_id' does not exist.";
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$total += $addon->{price};
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push @infos, [ $addon->{price}, $addon->{description} ]
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if $addon->{contra} =~ /^[-+]/;
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push @contras, [
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$addon->{contra},
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$addon->{price},
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"$addon->{description} ($contra_desc)"
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];
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push @addons, @{ $addon->{addons} };
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}
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my $entry = $cart->add(
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-$total,
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$product->{description},
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{ product_id => $product->{id}, plugin => $self->id, addons => $product->{addons} }
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);
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$entry->add_contra(
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$product->{contra},
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+$price,
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$contra_desc
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);
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$entry->add_info(@$_) for @infos;
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$entry->add_contra(@$_) for @contras;
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return ACCEPT;
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}
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87
plugins/products.pod
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87
plugins/products.pod
Normal file
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@ -0,0 +1,87 @@
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=head1 NAME
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products - RevBank plugin for selling products
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=head1 SYNOPISIS
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8710447032756 0.80 Festini Peer
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4029764001807,clubmate 1.40 Club-Mate +pf
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pf 0.15@+pfand Pfand NRW-Flasche
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=head1 DESCRIPTION
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This plugin turns products from a product list into RevBank commands.
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The configuration for this plugin lives in a text file called
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C<revbank.products>, which has whitespace-separated columns:
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=head2 Product ids
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One or more product ids, separated by commas (no whitespace before or after the
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commas). There is no way to have a comma or whitespace in a product id, but
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every other printable character is valid.
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The first product id on the line is considered canonical, the rest are aliases.
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Note: if a product id is the same as another RevBank command (e.g. a username),
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the first plugin that accepts the command will "win"; the precedence order is
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defined by the C<revbank.plugins> configuration file. However, when a product
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id appears multiple times within C<revbank.products>, the I<last> one is used.
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Product ids that begin with C<+> can only be used as addons. When entered as
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user input, it will be ignored by the C<products> plugin.
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=head2 Price
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The price of the product. This is the price to be deducted from the user's
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account when they check out with this product in the cart. When it is a
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negative number, the user will instead have money added to their account when
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"buying" this product.
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Optionally, the price can be augmented with at C<@> sign and the name of the
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contra account. When no contra account is specified, C<+sales/products> is used.
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Internal accounts (that start with C<-> or C<+>) are created automatically. A
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regular account can also be used, but has to exist before the product can be
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used.
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(Note on internal accounts because they aren't documented elsewhere: liability
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and revenue accounts begin with C<+>, asset and expense accounts begin with
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C<->. The C<+> accounts typically grow larger over time, while C<-> accounts
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typically go negative. In general, you would use a C<+> account in
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C<revbank.products>. User accounts are liability accounts.)
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=head2 Description
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The description may contain whitespace.
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=head2 Addons
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Addons are products that are added as part of the main product. They are
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specified after the description, with a C<+> sign that has whitespace before
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it, and no whitespace after it.
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When specifying an addon C<+foo>, and no product with the id C<+foo> exists,
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the product id C<foo> is used instead. The difference is that a product id
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C<+foo> can only be used as an addon for another product, while C<foo> can be
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used either as an addon or a manually entered as a standalone product.
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example_id 2.20 Example product +first +second
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+first 1.20 First thing
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second 0.80 Second thing
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In this example, the final price of the example product will be 4.20. It is not
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possible to buy the first thing separate, but it is possible to buy the second
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thing separate.
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The addon product must be specified in C<revbank.products>; market products
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cannot be used as addons.
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When a product has addons, it becomes a compound product. This can be used to
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separate a product into individual counter accounts for bookkeeping purposes,
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to add a bottle deposit, or to add other additional fees or discounts.
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When a compound product has a bare price that isn't 0.00, the bare price is
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listed as a component named "Product".
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A product can have multiple addons. Addon products themselves can also have
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further addons, but circular recursion is not supported.
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2
revbank
2
revbank
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@ -18,7 +18,7 @@ use RevBank::Global;
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use RevBank::Messages;
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use RevBank::Cart;
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our $VERSION = "3.5";
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our $VERSION = "3.6";
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our %HELP1 = (
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"abort" => "Abort the current transaction",
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);
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@ -19,6 +19,7 @@ stock
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unlisted
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#warnings
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adduser
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edit
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beep_terminal
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