From a3d1591929797376c390a924e16a6f5e2ca3b5f2 Mon Sep 17 00:00:00 2001
From: Oliver Walters <oliver.henry.walters@gmail.com>
Date: Sat, 18 May 2019 20:09:41 +1000
Subject: [PATCH] Display part pricing in Part view

- Calculate min_price and max_price based on provided supplier information
---
 InvenTree/company/models.py                  |  4 +-
 InvenTree/part/models.py                     | 55 ++++++++++++++++++++
 InvenTree/part/templates/part/part_base.html | 19 +++++++
 3 files changed, 77 insertions(+), 1 deletion(-)

diff --git a/InvenTree/company/models.py b/InvenTree/company/models.py
index 06aa100f26..b45bd04c3d 100644
--- a/InvenTree/company/models.py
+++ b/InvenTree/company/models.py
@@ -7,6 +7,8 @@ from __future__ import unicode_literals
 
 import os
 
+import math
+
 from django.core.validators import MinValueValidator
 
 from django.apps import apps
@@ -260,7 +262,7 @@ class SupplierPart(models.Model):
 
         # Order multiples
         if multiples:
-            quantity = int(math.ceil(quantity / self.multipe) * self.multiple)
+            quantity = int(math.ceil(quantity / self.multiple) * self.multiple)
 
         pb_found = False
         pb_quantity = -1
diff --git a/InvenTree/part/models.py b/InvenTree/part/models.py
index 62fb6e7553..00fb07290e 100644
--- a/InvenTree/part/models.py
+++ b/InvenTree/part/models.py
@@ -563,6 +563,61 @@ class Part(models.Model):
         """ Return the number of supplier parts available for this part """
         return self.supplier_parts.count()
 
+    @property
+    def min_single_price(self):
+        return self.get_min_supplier_price(1)
+
+    @property
+    def max_single_price(self):
+        return self.get_max_supplier_price(1)
+
+    def get_min_supplier_price(self, quantity=1):
+        """ Return the minimum price of this part from all available suppliers.
+        
+        Args:
+            quantity: Number of units we wish to purchase (default = 1)
+
+        Returns:
+            Numerical price if pricing is available, else None
+         """
+
+        min_price = None
+
+        for supplier_part in self.supplier_parts.all():
+            supplier_price = supplier_part.get_price(quantity)
+
+            if supplier_price is None:
+                continue
+
+            if min_price is None or supplier_price < min_price:
+                min_price = supplier_price
+
+        return min_price
+
+    def get_max_supplier_price(self, quantity=1):
+        """ Return the maximum price of this part from all available suppliers.
+        
+        Args:
+            quantity: Number of units we wish to purchase (default = 1)
+
+        Returns:
+            Numerical price if pricing is available, else None
+         """
+
+        max_price = None
+
+        for supplier_part in self.supplier_parts.all():
+            supplier_price = supplier_part.get_price(quantity)
+
+            if supplier_price is None:
+                continue
+
+            if max_price is None or supplier_price > max_price:
+                max_price = supplier_price
+
+        return max_price
+
+
     def deepCopy(self, other, **kwargs):
         """ Duplicates non-field data from another part.
         Does not alter the normal fields of this part,
diff --git a/InvenTree/part/templates/part/part_base.html b/InvenTree/part/templates/part/part_base.html
index ea3bbc7617..405556bdfa 100644
--- a/InvenTree/part/templates/part/part_base.html
+++ b/InvenTree/part/templates/part/part_base.html
@@ -82,6 +82,25 @@
             <td>{{ part.allocation_count }}</td>
         </tr>
         {% endif %}
+        {% if part.supplier_count > 0 %}
+        <tr>
+            <td>
+                Price
+            </td>
+            <td>
+                {% if part.min_single_price %}
+                {% if part.min_single_price == part.max_single_price %}
+                {{ part.min_single_price }}
+                {% else %}
+                {{ part.min_single_price }} to {{ part.max_single_price }}
+                {% endif %}
+                from {{ part.supplier_count }} suppliers.
+                {% else %}
+                <span class='warning-msg'><i>No pricing data avilable</i></span>
+                {% endif %}
+            </td>
+        </tr>
+        {% endif %}
     </table>
 </div>
 </div>