From 2edb7f2b5580e97203fd1b5d480eb064d7c1465a Mon Sep 17 00:00:00 2001
From: Oliver <oliver.henry.walters@gmail.com>
Date: Thu, 9 Mar 2023 00:18:39 +1100
Subject: [PATCH] Adds "stock value" calculation to stock table (#4471)

* Add part pricing data to stockitem list serializer

* Add "stock value" column to stock list table
---
 InvenTree/part/serializers.py                |  6 ++
 InvenTree/stock/serializers.py               |  2 +
 InvenTree/templates/js/translated/pricing.js |  2 +-
 InvenTree/templates/js/translated/stock.js   | 81 ++++++++++++++++++++
 4 files changed, 90 insertions(+), 1 deletion(-)

diff --git a/InvenTree/part/serializers.py b/InvenTree/part/serializers.py
index 55b0d0622c..c5600fb36c 100644
--- a/InvenTree/part/serializers.py
+++ b/InvenTree/part/serializers.py
@@ -281,6 +281,8 @@ class PartBriefSerializer(InvenTreeModelSerializer):
             'trackable',
             'virtual',
             'units',
+            'pricing_min',
+            'pricing_max',
         ]
 
         read_only_fields = [
@@ -289,6 +291,10 @@ class PartBriefSerializer(InvenTreeModelSerializer):
 
     thumbnail = serializers.CharField(source='get_thumbnail_url', read_only=True)
 
+    # Pricing fields
+    pricing_min = InvenTreeMoneySerializer(source='pricing_data.overall_min', allow_null=True, read_only=True)
+    pricing_max = InvenTreeMoneySerializer(source='pricing_data.overall_max', allow_null=True, read_only=True)
+
 
 class DuplicatePartSerializer(serializers.Serializer):
     """Serializer for specifying options when duplicating a Part.
diff --git a/InvenTree/stock/serializers.py b/InvenTree/stock/serializers.py
index 7336a1d15c..1d93f900bd 100644
--- a/InvenTree/stock/serializers.py
+++ b/InvenTree/stock/serializers.py
@@ -165,6 +165,8 @@ class StockItemSerializer(InvenTree.serializers.InvenTreeModelSerializer):
         queryset = queryset.prefetch_related(
             'sales_order',
             'purchase_order',
+            'part',
+            'part__pricing_data',
         )
 
         # Annotate the queryset with the total allocated to sales orders
diff --git a/InvenTree/templates/js/translated/pricing.js b/InvenTree/templates/js/translated/pricing.js
index 590d5124c7..0e27aad229 100644
--- a/InvenTree/templates/js/translated/pricing.js
+++ b/InvenTree/templates/js/translated/pricing.js
@@ -136,7 +136,7 @@ function calculateTotalPrice(dataset, value_func, currency_func, options={}) {
 
     var currency = options.currency;
 
-    var rates = getCurrencyConversionRates();
+    var rates = options.rates || getCurrencyConversionRates();
 
     if (!rates) {
         console.error('Could not retrieve currency conversion information from the server');
diff --git a/InvenTree/templates/js/translated/stock.js b/InvenTree/templates/js/translated/stock.js
index 36ca11a64a..f25efdee43 100644
--- a/InvenTree/templates/js/translated/stock.js
+++ b/InvenTree/templates/js/translated/stock.js
@@ -2065,6 +2065,86 @@ function loadStockTable(table, options) {
         }
     });
 
+    // Total value of stock
+    // This is not sortable, and may default to the 'price range' for the parent part
+    columns.push({
+        field: 'stock_value',
+        title: '{% trans "Stock Value" %}',
+        sortable: false,
+        switchable: true,
+        formatter: function(value, row) {
+            let min_price = row.purchase_price;
+            let max_price = row.purchase_price;
+            let currency = row.purchase_price_currency;
+
+            if (min_price == null && max_price == null && row.part_detail) {
+                min_price = row.part_detail.pricing_min;
+                max_price = row.part_detail.pricing_max;
+                currency = baseCurrency();
+            }
+
+            return formatPriceRange(
+                min_price,
+                max_price,
+                {
+                    quantity: row.quantity,
+                    currency: currency
+                }
+            );
+        },
+        footerFormatter: function(data) {
+            // Display overall range of value for the selected items
+            let rates = getCurrencyConversionRates();
+            let base = baseCurrency();
+
+            let min_price = calculateTotalPrice(
+                data,
+                function(row) {
+                    return row.quantity * (row.purchase_price || row.part_detail.pricing_min);
+                },
+                function(row) {
+                    if (row.purchase_price) {
+                        return row.purchase_price_currency;
+                    } else {
+                        return base;
+                    }
+                },
+                {
+                    currency: base,
+                    rates: rates,
+                    raw: true,
+                }
+            );
+
+            let max_price = calculateTotalPrice(
+                data,
+                function(row) {
+                    return row.quantity * (row.purchase_price || row.part_detail.pricing_max);
+                },
+                function(row) {
+                    if (row.purchase_price) {
+                        return row.purchase_price_currency;
+                    } else {
+                        return base;
+                    }
+                },
+                {
+                    currency: base,
+                    rates: rates,
+                    raw: true,
+                }
+            );
+
+            return formatPriceRange(
+                min_price,
+                max_price,
+                {
+                    currency: base,
+                }
+            );
+        }
+    });
+
     columns.push({
         field: 'packaging',
         title: '{% trans "Packaging" %}',
@@ -2085,6 +2165,7 @@ function loadStockTable(table, options) {
         name: 'stock',
         original: original,
         showColumns: true,
+        showFooter: true,
         columns: columns,
     });