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package SL::DB::Part;

use strict;

use Carp;
use List::MoreUtils qw(any uniq);
use List::Util qw(sum);
use Rose::DB::Object::Helpers qw(as_tree);

use SL::Locale::String qw(t8);
use SL::Helper::Inventory;
use SL::DBUtils;
use SL::DB::MetaSetup::Part;
use SL::DB::Manager::Part;
use SL::DB::Helper::AttrHTML;
use SL::DB::Helper::AttrSorted;
use SL::DB::Helper::TransNumberGenerator;
use SL::DB::Helper::CustomVariables (
module => 'IC',
cvars_alias => 1,
);
use SL::DB::Helper::DisplayableNamePreferences (
title => t8('Article'),
options => [ {name => 'partnumber', title => t8('Part Number') },
{name => 'description', title => t8('Description') },
{name => 'notes', title => t8('Notes')},
{name => 'ean', title => t8('EAN') }, ],
);


__PACKAGE__->meta->add_relationships(
assemblies => {
type => 'one to many',
class => 'SL::DB::Assembly',
manager_args => { sort_by => 'position' },
column_map => { id => 'id' },
},
prices => {
type => 'one to many',
class => 'SL::DB::Price',
column_map => { id => 'parts_id' },
manager_args => { with_objects => [ 'pricegroup' ] }
},
makemodels => {
type => 'one to many',
class => 'SL::DB::MakeModel',
manager_args => { sort_by => 'sortorder' },
column_map => { id => 'parts_id' },
},
businessmodels => {
type => 'one to many',
class => 'SL::DB::BusinessModel',
column_map => { id => 'parts_id' },
},
customerprices => {
type => 'one to many',
class => 'SL::DB::PartCustomerPrice',
column_map => { id => 'parts_id' },
},
translations => {
type => 'one to many',
class => 'SL::DB::Translation',
column_map => { id => 'parts_id' },
},
assortment_items => {
type => 'one to many',
class => 'SL::DB::AssortmentItem',
column_map => { id => 'assortment_id' },
manager_args => { sort_by => 'position' },
},
history_entries => {
type => 'one to many',
class => 'SL::DB::History',
column_map => { id => 'trans_id' },
query_args => [ what_done => 'part' ],
manager_args => { sort_by => 'itime' },
},
shop_parts => {
type => 'one to many',
class => 'SL::DB::ShopPart',
column_map => { id => 'part_id' },
manager_args => { with_objects => [ 'shop' ] },
},
last_price_update => {
type => 'one to one',
class => 'SL::DB::PartsPriceHistory',
column_map => { id => 'part_id' },
manager_args => { sort_by => 'valid_from DESC, id DESC', limit => 1 },
},
purchase_basket_item => {
type => 'one to one',
class => 'SL::DB::PurchaseBasketItem',
column_map => { id => 'part_id' },
},
);

__PACKAGE__->meta->initialize;

use Rose::Object::MakeMethods::Generic (
'scalar --get_set_init' => [ qw(onhandqty stockqty get_open_ordered_qty) ],
);
__PACKAGE__->attr_html('notes');
__PACKAGE__->attr_sorted({ unsorted => 'makemodels', position => 'sortorder' });
__PACKAGE__->attr_sorted({ unsorted => 'customerprices', position => 'sortorder' });
__PACKAGE__->attr_sorted('businessmodels');

__PACKAGE__->before_save('_before_save_set_partnumber');
__PACKAGE__->before_save('_before_save_set_assembly_weight');

sub _before_save_set_partnumber {
my ($self) = @_;

$self->create_trans_number if !$self->partnumber;
return 1;
}

sub _before_save_set_assembly_weight {
my ($self) = @_;

if ( $self->part_type eq 'assembly' ) {
my $weight_sum = $self->items_weight_sum;
$self->weight($self->items_weight_sum) if $weight_sum;
}
return 1;
}

sub items {
my ($self) = @_;

if ( $self->part_type eq 'assembly' ) {
return $self->assemblies;
} elsif ( $self->part_type eq 'assortment' ) {
return $self->assortment_items;
} else {
return undef;
}
}

sub items_checksum {
my ($self) = @_;

# for detecting if the items of an (orphaned) assembly or assortment have
# changed when saving

return join(' ', sort map { $_->part->id } @{$self->items});
}

sub validate {
my ($self) = @_;

my @errors;
push @errors, $::locale->text('The partnumber is missing.') if $self->id and !$self->partnumber;
push @errors, $::locale->text('The unit is missing.') unless $self->unit;
push @errors, $::locale->text('The buchungsgruppe is missing.') unless $self->buchungsgruppen_id or $self->buchungsgruppe;

if ( $::instance_conf->get_partsgroup_required
&& ( !$self->partsgroup_id or ( $self->id && !$self->partsgroup_id && $self->partsgroup ) ) ) {
# when unsetting an existing partsgroup in the interface, $self->partsgroup_id will be undef but $self->partsgroup will still have a value
# this needs to be checked, as partsgroup dropdown has an empty value
push @errors, $::locale->text('The partsgroup is missing.');
}

push @errors, $::locale->text('The partnumber already exists.') if SL::DB::Manager::Part->get_all_count(where => [ partnumber => $self->partnumber, '!id' => $self->id ]);

if ($self->is_assortment && $self->orphaned && scalar @{$self->assortment_items} == 0) {
# when assortment isn't orphaned form doesn't contain any items
push @errors, $::locale->text('The assortment doesn\'t have any items.');
}

if ($self->is_assembly && scalar @{$self->assemblies} == 0) {
push @errors, $::locale->text('The assembly doesn\'t have any items.');
}

return @errors;
}

sub is_type {
my $self = shift;
my $type = lc(shift || '');
die 'invalid type' unless $type =~ /^(?:part|service|assembly|assortment)$/;

return $self->type eq $type ? 1 : 0;
}

sub is_part { $_[0]->part_type eq 'part' }
sub is_assembly { $_[0]->part_type eq 'assembly' }
sub is_service { $_[0]->part_type eq 'service' }
sub is_assortment { $_[0]->part_type eq 'assortment' }

sub type {
return $_[0]->part_type;
# my ($self, $type) = @_;
# if (@_ > 1) {
# die 'invalid type' unless $type =~ /^(?:part|service|assembly)$/;
# $self->assembly( $type eq 'assembly' ? 1 : 0);
# $self->inventory_accno_id($type ne 'service' ? 1 : undef);
# }

# return 'assembly' if $self->assembly;
# return 'part' if $self->inventory_accno_id;
# return 'service';
}

sub new_part {
my ($class, %params) = @_;
$class->new(%params, part_type => 'part');
}

sub new_assembly {
my ($class, %params) = @_;
$class->new(%params, part_type => 'assembly');
}

sub new_service {
my ($class, %params) = @_;
$class->new(%params, part_type => 'service');
}

sub new_assortment {
my ($class, %params) = @_;
$class->new(%params, part_type => 'assortment');
}

sub last_modification {
my ($self) = @_;
return $self->mtime // $self->itime;
}

sub used_in_record {
my ($self) = @_;
die 'not an accessor' if @_ > 1;

return 1 unless $self->id;

my @relations = qw(
SL::DB::InvoiceItem
SL::DB::OrderItem
SL::DB::DeliveryOrderItem
);

for my $class (@relations) {
eval "require $class";
return 1 if $class->_get_manager_class->get_all_count(query => [ parts_id => $self->id ]);
}
return 0;
}

sub orphaned {
my ($self) = @_;
die 'not an accessor' if @_ > 1;

return 1 unless $self->id;

my @relations = qw(
SL::DB::InvoiceItem
SL::DB::OrderItem
SL::DB::DeliveryOrderItem
SL::DB::Inventory
SL::DB::AssortmentItem
);

for my $class (@relations) {
eval "require $class";
return 0 if $class->_get_manager_class->get_all_count(query => [ parts_id => $self->id ]);
}
return 1;
}

sub get_sellprice_info {
my $self = shift;
my %params = @_;

confess "Missing part id" unless $self->id;

my $object = $self->load;

return { sellprice => $object->sellprice,
price_factor_id => $object->price_factor_id };
}

sub get_ordered_qty {
my $self = shift;
my %result = SL::DB::Manager::Part->get_ordered_qty($self->id);

return $result{ $self->id };
}

sub available_units {
shift->unit_obj->convertible_units;
}

# autogenerated accessor is slightly off...
sub buchungsgruppe {
shift->buchungsgruppen(@_);
}

sub get_taxkey {
my ($self, %params) = @_;

my $date = $params{date} || DateTime->today_local;
my $is_sales = !!$params{is_sales};
my $taxzone = $params{ defined($params{taxzone}) ? 'taxzone' : 'taxzone_id' } * 1;
my $tk_info = $::request->cache('get_taxkey');

$tk_info->{$self->id} //= {};
$tk_info->{$self->id}->{$taxzone} //= { };
my $cache = $tk_info->{$self->id}->{$taxzone}->{$is_sales} //= { };

if (!exists $cache->{$date}) {
$cache->{$date} =
$self->get_chart(type => $is_sales ? 'income' : 'expense', taxzone => $taxzone)
->get_active_taxkey($date);
}

return $cache->{$date};
}

sub get_chart {
my ($self, %params) = @_;
require SL::DB::Chart;

my $type = (any { $_ eq $params{type} } qw(income expense inventory)) ? $params{type} : croak("Invalid 'type' parameter '$params{type}'");
my $taxzone = $params{ defined($params{taxzone}) ? 'taxzone' : 'taxzone_id' } * 1;

my $charts = $::request->cache('get_chart_id/by_part_id_and_taxzone')->{$self->id} //= {};
my $all_charts = $::request->cache('get_chart_id/by_id');

$charts->{$taxzone} ||= { };

if (!exists $charts->{$taxzone}->{$type}) {
require SL::DB::Buchungsgruppe;
my $bugru = SL::DB::Buchungsgruppe->load_cached($self->buchungsgruppen_id);
my $chart_id = ($type eq 'inventory') ? ($self->is_part ? $bugru->inventory_accno_id : undef)
: $bugru->call_sub("${type}_accno_id", $taxzone);

if ($chart_id) {
my $chart = $all_charts->{$chart_id} // SL::DB::Chart->load_cached($chart_id)->load;
$all_charts->{$chart_id} = $chart;
$charts->{$taxzone}->{$type} = $chart;
}
}

return $charts->{$taxzone}->{$type};
}

sub get_stock {
my ($self, %params) = @_;

return undef unless $self->id;

my $query = 'SELECT SUM(qty) FROM inventory WHERE parts_id = ?';
my @values = ($self->id);

if ( $params{bin_id} ) {
$query .= ' AND bin_id = ?';
push(@values, $params{bin_id});
}

if ( $params{warehouse_id} ) {
$query .= ' AND warehouse_id = ?';
push(@values, $params{warehouse_id});
}

if ( $params{shippingdate} ) {
die unless ref($params{shippingdate}) eq 'DateTime';
$query .= ' AND shippingdate <= ?';
push(@values, $params{shippingdate});
}

my ($stock) = selectrow_query($::form, $self->db->dbh, $query, @values);

return $stock || 0; # never return undef
}


# this is designed to ignore chargenumbers, expiration dates and just give a list of how much <-> where
sub get_simple_stock {
my ($self, %params) = @_;

return [] unless $self->id;

my $query = <<'';
SELECT sum(qty), warehouse_id, bin_id FROM inventory WHERE parts_id = ?
GROUP BY warehouse_id, bin_id

my $stock_info = selectall_hashref_query($::form, $::form->get_standard_dbh, $query, $self->id);
[ map { bless $_, 'SL::DB::Part::SimpleStock'} @$stock_info ];
}
# helper class to have bin/warehouse accessors in stock result
{ package SL::DB::Part::SimpleStock;
sub warehouse { require SL::DB::Warehouse; SL::DB::Manager::Warehouse->find_by_or_create(id => $_[0]->{warehouse_id}) }
sub bin { require SL::DB::Bin; SL::DB::Manager::Bin ->find_by_or_create(id => $_[0]->{bin_id}) }
}

sub get_simple_stock_sql {
my ($self, %params) = @_;

return [] unless $self->id;

my $query = <<SQL;
SELECT w.description AS warehouse_description,
b.description AS bin_description,
SUM(i.qty) AS qty,
SUM(i.qty * p.lastcost) AS stock_value,
p.unit AS unit,
LEAD(w.description) OVER pt AS wh_lead, -- to detect warehouse changes for subtotals in template
SUM( SUM(i.qty) ) OVER pt AS run_qty, -- running total of total qty
SUM( SUM(i.qty) ) OVER wh AS wh_run_qty, -- running total of warehouse qty
SUM( SUM(i.qty * p.lastcost)) OVER pt AS run_stock_value, -- running total of total stock_value
SUM( SUM(i.qty * p.lastcost)) OVER wh AS wh_run_stock_value -- running total of warehouse stock_value
FROM inventory i
LEFT JOIN parts p ON (p.id = i.parts_id)
LEFT JOIN warehouse w ON (i.warehouse_id = w.id)
LEFT JOIN bin b ON (i.bin_id = b.id)
WHERE parts_id = ?
GROUP BY w.description, w.sortkey, b.description, p.unit, i.parts_id
HAVING SUM(qty) != 0
WINDOW pt AS (PARTITION BY i.parts_id ORDER BY w.sortkey, b.description, p.unit),
wh AS (PARTITION by w.description ORDER BY w.sortkey, b.description, p.unit)
ORDER BY w.sortkey, b.description, p.unit
SQL

my $stock_info = selectall_hashref_query($::form, $self->db->dbh, $query, $self->id);
return $stock_info;
}

sub get_mini_journal {
my ($self) = @_;

# inventory ids of the most recent 10 inventory trans_ids

# duplicate code copied from SL::Controller::Inventory mini_journal, except
# for the added filter on parts_id

my $parts_id = $self->id;
my $query = <<"SQL";
with last_inventories as (
select id,
trans_id,
itime
from inventory
where parts_id = $parts_id
order by itime desc
limit 20
),
grouped_ids as (
select trans_id,
array_agg(id) as ids
from last_inventories
group by trans_id
order by max(itime)
desc limit 10
)
select unnest(ids)
from grouped_ids
limit 20 -- so the planner knows how many ids to expect, the cte is an optimisation fence
SQL

my $objs = SL::DB::Manager::Inventory->get_all(
query => [ id => [ \"$query" ] ], # make emacs happy "]]
with_objects => [ 'parts', 'trans_type', 'bin', 'bin.warehouse' ], # prevent lazy loading in template
sort_by => 'itime DESC',
);
# remember order of trans_ids from query, for ordering hash later
my @sorted_trans_ids = uniq map { $_->trans_id } @$objs;

# at most 2 of them belong to a transaction and the qty determines in or out.
my %transactions;
for (@$objs) {
$transactions{ $_->trans_id }{ $_->qty > 0 ? 'in' : 'out' } = $_;
$transactions{ $_->trans_id }{base} = $_;
}

# because the inventory transactions were built in a hash, we need to sort the
# hash by usi