[IMP] point_of_sale: Add the EAN13 field on the user with validation

bzr revid: stw@openerp.com-20120509093517-24lw0pbiqum0wpw1

addons/point_of_sale/__init__.py

@@ -22,6 +22,7 @@
 import point_of_sale
 import account_bank_statement
 import product
+import res_users
 import wizard
 import report
 

addons/point_of_sale/__openerp__.py

@@ -67,6 +67,7 @@ Main features :
         'account_statement_view.xml',
         'account_statement_report.xml',
         'product_view.xml',
+        'res_users_view.xml',
     ],
     'demo_xml': [
         'point_of_sale_demo.xml',

addons/point_of_sale/res_users.py

@@ -0,0 +1,54 @@
+#!/usr/bin/env python
+from osv import osv, fields
+import math
+
+def is_pair(x):
+    return not x%2
+# This code is a duplicate of product#check_ean function
+def check_ean(eancode):
+    if not eancode:
+        return True
+    if len(eancode) <> 13:
+        return False
+    try:
+        int(eancode)
+    except:
+        return False
+    oddsum=0
+    evensum=0
+    total=0
+    eanvalue=eancode
+    reversevalue = eanvalue[::-1]
+    finalean=reversevalue[1:]
+
+    for i in range(len(finalean)):
+        if is_pair(i):
+            oddsum += int(finalean[i])
+        else:
+            evensum += int(finalean[i])
+    total=(oddsum * 3) + evensum
+
+    check = int(10 - math.ceil(total % 10.0)) %10
+
+    if check != int(eancode[-1]):
+        return False
+    return True
+
+class res_users(osv.osv):
+    _inherit = 'res.users'
+
+    _columns = {
+        'ean13' : fields.char('EAN13', size=13, help="BarCode"),
+    }
+
+    def _check_ean(self, cr, uid, ids, context=None):
+        return all(
+            check_ean(user.ean13) == True
+            for user in self.browse(cr, uid, ids, context=context)
+        )   
+
+    _constraints = [
+        (_check_ean, "Error: Invalid ean code", ['ean13'],),
+    ]
+
+    

addons/point_of_sale/res_users_view.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<openerp>
+	<data>
+    <record id="res_users_form_view" model="ir.ui.view">
+        <field name="name">res.users.form.view</field>
+        <field name="model">res.users</field>
+        <field name="type">form</field>
+        <field name="inherit_id" ref="base.view_users_form" />
+        <field name="arch" type="xml">
+        	<notebook position="inside">
+        		<page string="Point Of Sale">
+        			<field name="ean13" />
+        		</page>
+        	</notebook>
+        </field>
+    </record>
+	</data>
+</openerp>