From f25e72609623d36f5c3c564daf69e1bdb4dabc04 Mon Sep 17 00:00:00 2001
From: Frederic van der Essen <fva@openerp.com / fvdessen+o@gmail.com>
Date: Mon, 10 Nov 2014 19:28:59 +0100
Subject: [PATCH] [IMP] point_of_sale: add helper function to compute
 tax-specific subtotals, useful for receipt customization

---
 addons/point_of_sale/static/src/js/models.js | 43 +++++++++++++++++++-
 1 file changed, 42 insertions(+), 1 deletion(-)

diff --git a/addons/point_of_sale/static/src/js/models.js b/addons/point_of_sale/static/src/js/models.js
index 034d13edb35..23817342084 100644
--- a/addons/point_of_sale/static/src/js/models.js
+++ b/addons/point_of_sale/static/src/js/models.js
@@ -194,7 +194,14 @@ function openerp_pos_models(instance, module){ //module is instance.point_of_sal
             model:  'account.tax',
             fields: ['name','amount', 'price_include', 'type'],
             domain: null,
-            loaded: function(self,taxes){ self.taxes = taxes; },
+            loaded: function(self,taxes){ 
+                self.taxes = taxes; 
+                self.taxes_by_id = {};
+                
+                for (var i = 0; i < taxes.length; i++) {
+                    self.taxes_by_id[taxes[i].id] = taxes[i];
+                }
+            },
         },{
             model:  'pos.session',
             fields: ['id', 'journal_ids','name','user_id','config_id','start_at','stop_at','sequence_number','login_number'],
@@ -948,6 +955,14 @@ function openerp_pos_models(instance, module){ //module is instance.point_of_sal
         get_tax_details: function(){
             return this.get_all_prices().taxDetails;
         },
+        get_taxes: function(){
+            var taxes_ids = this.get_product().taxes_id;
+            var taxes = [];
+            for (var i = 0; i < taxes_ids.length; i++) {
+                taxes.push(this.pos.taxes_by_id[taxes_ids[i]]);
+            }
+            return taxes;
+        },
         get_all_prices: function(){
             var self = this;
             var currency_rounding = this.pos.currency.rounding;
@@ -1490,6 +1505,32 @@ function openerp_pos_models(instance, module){ //module is instance.point_of_sal
 
             return total;
         },
+        get_total_for_taxes: function(tax_id){
+            var total = 0;
+            var self = this;
+
+            if (!(tax_id instanceof Array)) {
+                tax_id = [tax_id];
+            }
+
+            var tax_set = {};
+
+            for (var i = 0; i < tax_id.length; i++) {
+                tax_set[tax_id[i]] = true;
+            }
+
+            this.orderlines.each(function(line){
+                var taxes_ids = line.get_product().taxes_id;
+                for (var i = 0; i < taxes_ids.length; i++) {
+                    if (tax_set[taxes_ids[i]]) {
+                        total += line.get_price_with_tax();
+                        return;
+                    }
+                }
+            });
+
+            return total;
+        },
         get_change: function(paymentline) {
             if (!paymentline) {
                 var change = this.get_total_paid() - this.get_total_with_tax();