From 01629c3c934f1f6fd2ab9de5f7638f671fd59791 Mon Sep 17 00:00:00 2001
From: Mark Wells <mark@freeside.biz>
Date: Fri, 25 May 2012 13:38:07 -0700
Subject: customer bill/ship location refactoring, #940

---
 FS/FS/cust_main/Billing.pm | 56 +++++++++++++++++++++++++++++-----------------
 1 file changed, 35 insertions(+), 21 deletions(-)

(limited to 'FS/FS/cust_main/Billing.pm')

diff --git a/FS/FS/cust_main/Billing.pm b/FS/FS/cust_main/Billing.pm
index ca8d996..339fa44 100644
--- a/FS/FS/cust_main/Billing.pm
+++ b/FS/FS/cust_main/Billing.pm
@@ -721,6 +721,11 @@ jurisdictions (i.e. Texas) have tax exemptions which are date sensitive.
 sub calculate_taxes {
   my ($self, $cust_bill_pkg, $taxlisthash, $invoice_time) = @_;
 
+  # $taxlisthash is a hashref
+  # keys are identifiers, values are arrayrefs
+  # each arrayref starts with a tax object (cust_main_county or tax_rate)
+  # then any cust_bill_pkg objects the tax applies to
+
   local($DEBUG) = $FS::cust_main::DEBUG if $FS::cust_main::DEBUG > $DEBUG;
 
   warn "$me calculate_taxes\n"
@@ -746,9 +751,15 @@ sub calculate_taxes {
   my %tax_rate_location = ();
 
   foreach my $tax ( keys %$taxlisthash ) {
+    # $tax is a tax identifier
     my $tax_object = shift @{ $taxlisthash->{$tax} };
+    # $tax_object is a cust_main_county or tax_rate 
+    # (with pkgnum and locationnum set)
+    # the rest of @{ $taxlisthash->{$tax} } is cust_bill_pkg objects
     warn "found ". $tax_object->taxname. " as $tax\n" if $DEBUG > 2;
     warn " ". join('/', @{ $taxlisthash->{$tax} } ). "\n" if $DEBUG > 2;
+    # taxline calculates the tax on all cust_bill_pkgs in the 
+    # first (arrayref) argument
     my $hashref_or_error =
       $tax_object->taxline( $taxlisthash->{$tax},
                             'custnum'      => $self->custnum,
@@ -767,8 +778,10 @@ sub calculate_taxes {
 
     $tax{ $tax } += $amount;
 
+    # link records between cust_main_county/tax_rate and cust_location
     $tax_location{ $tax } ||= [];
-    if ( $tax_object->get('pkgnum') || $tax_object->get('locationnum') ) {
+    $tax_rate_location{ $tax } ||= [];
+    if ( ref($tax_object) eq 'FS::cust_main_county' ) {
       push @{ $tax_location{ $tax }  },
         {
           'taxnum'      => $tax_object->taxnum, 
@@ -778,9 +791,7 @@ sub calculate_taxes {
           'amount'      => sprintf('%.2f', $amount ),
         };
     }
-
-    $tax_rate_location{ $tax } ||= [];
-    if ( ref($tax_object) eq 'FS::tax_rate' ) {
+    elsif ( ref($tax_object) eq 'FS::tax_rate' ) {
       my $taxratelocationnum =
         $tax_object->tax_rate_location->taxratelocationnum;
       push @{ $tax_rate_location{ $tax }  },
@@ -1206,21 +1217,12 @@ sub _handle_taxes {
     } else {
 
       my @loc_keys = qw( district city county state country );
-      my %taxhash;
-      if ( $conf->exists('tax-pkg_address') && $cust_pkg->locationnum ) {
-        my $cust_location = $cust_pkg->cust_location;
-        %taxhash = map { $_ => $cust_location->$_()    } @loc_keys;
-      } else {
-        my $prefix = 
-          ( $conf->exists('tax-ship_address') && length($self->ship_last) )
-          ? 'ship_'
-          : '';
-        %taxhash = map { $_ => $self->get("$prefix$_") } @loc_keys;
-      }
+      my $location = $cust_pkg->tax_location;
+      my %taxhash = map { $_ => $location->$_ } @loc_keys;
 
       $taxhash{'taxclass'} = $part_pkg->taxclass;
 
-      my @taxes = ();
+      my @taxes = (); # entries are cust_main_county objects
       my %taxhash_elim = %taxhash;
       my @elim = qw( district city county state );
       do { 
@@ -1243,11 +1245,13 @@ sub _handle_taxes {
                     @taxes
         if $self->cust_main_exemption; #just to be safe
 
-      if ( $conf->exists('tax-pkg_address') && $cust_pkg->locationnum ) {
-        foreach (@taxes) {
-          $_->set('pkgnum',      $cust_pkg->pkgnum );
-          $_->set('locationnum', $cust_pkg->locationnum );
-        }
+      # all packages now have a locationnum and should get a 
+      # cust_bill_pkg_tax_location record.  The tax_locationnum
+      # may be the package's locationnum, or the customer's bill 
+      # or service location.
+      foreach (@taxes) {
+        $_->set('pkgnum',      $cust_pkg->pkgnum);
+        $_->set('locationnum', $cust_pkg->tax_locationnum);
       }
 
       $taxes{''} = [ @taxes ];
@@ -1274,17 +1278,27 @@ sub _handle_taxes {
 
   my %tax_cust_bill_pkg = $cust_bill_pkg->disintegrate;
   foreach my $key (keys %tax_cust_bill_pkg) {
+    # $key is "setup", "recur", or a usage class name. ('' is a usage class.)
+    # $tax_cust_bill_pkg{$key} is a cust_bill_pkg for that component of 
+    # the line item.
+    # $taxes{$key} is an arrayref of cust_main_county or tax_rate objects that
+    # apply to $key-class charges.
     my @taxes = @{ $taxes{$key} || [] };
     my $tax_cust_bill_pkg = $tax_cust_bill_pkg{$key};
 
     my %localtaxlisthash = ();
     foreach my $tax ( @taxes ) {
 
+      # this is the tax identifier, not the taxname
       my $taxname = ref( $tax ). ' '. $tax->taxnum;
 #      $taxname .= ' pkgnum'. $cust_pkg->pkgnum.
 #                  ' locationnum'. $cust_pkg->locationnum
 #        if $conf->exists('tax-pkg_address') && $cust_pkg->locationnum;
 
+      # $taxlisthash: keys are "setup", "recur", and usage classes
+      # values are arrayrefs, first the tax object (cust_main_county
+      # or tax_rate) and then any cust_bill_pkg objects that the 
+      # tax applies to
       $taxlisthash->{ $taxname } ||= [ $tax ];
       push @{ $taxlisthash->{ $taxname  } }, $tax_cust_bill_pkg;
 
-- 
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