[membership_date2date] initial implementation

XXX: there are bugs in the dates of associate members
     when mixing several membership products

XML product can be made date to date with:
	<field name="membership_date2date">True</field>

XML invoice can be done like that:
	<function model="res.partner"
	 name="create_membership_invoice"
	 eval="(ref('res_partner_velorution_idf_42')
	 , ref('product_standard_member')
	 , {'amount':15, 'date_from':'2012-04-02'})" />
where date_from is %Y-%m-%d or None for today()

NOTE: membership currently needs this fix:
	diff -Nru0 old/membership.py new/membership.py
	--- old/membership.py   2012-12-21 05:59:41.930076247 +0100
	+++ new/membership.py   2012-12-21 05:59:06.338076588 +0100
	@@ -340 +340 @@
	-                    _membership_date, multi = 'membeship_start',
	+                    _membership_date, multi = 'membership_start',

diff --git a/remembership.py b/remembership.py
index c2e6c85..ee17cb1 100644 (file)
--- a/remembership.py
+++ b/remembership.py
@@ -24,6 +24,8 @@
 from osv import osv
 from osv import fields
 import time
+from datetime import datetime, date
+from dateutil.relativedelta import relativedelta
 
 
 class Partner(osv.osv):
@@ -38,6 +40,12 @@ class Partner(osv.osv):
         ('member_ident_uniq', 'unique(member_ident, company_id)', 'The member identifier must be unique !'),
     ]
 
+    def create_membership_invoice(self, cr, uid, ids, product_id=None, datas=None, context=None):
+        # NOTE: use context to supply date_from to account_invoice_line.create
+        ctx = context and context.copy() or {}
+        ctx['date_from'] = datas.get('date_from', None)
+        return super(Partner, self).create_membership_invoice(cr, uid, ids, product_id=product_id, datas=datas, context=ctx)
+
 Partner()
 
 
@@ -55,7 +63,6 @@ Product()
 class account_invoice_line(osv.osv):
     _inherit = 'account.invoice.line'
 
-
     def write(self, cr, uid, ids, vals, context=None):
         member_line_obj = self.pool.get('membership.membership_line')
         res = super(account_invoice_line, self).write(cr, uid, ids, vals, context=context)
@@ -63,10 +70,25 @@ class account_invoice_line(osv.osv):
             if line.invoice_id.type == 'out_invoice':
                 ml_ids = member_line_obj.search(cr, uid, [('account_invoice_line', '=', line.id)], context=context)
                 if line.product_id and line.product_id.membership:
-                    date_from = line.product_id.membership_date_from
-                    date_to = line.product_id.membership_date_to
-                    if line.invoice_id.date_invoice > date_from and line.invoice_id.date_invoice < date_to:
-                        date_from = line.invoice_id.date_invoice
+                    member_line_id = member_line_obj.search(cr, uid
+                      , [('partner'             , '=', line.invoice_id.partner_id.id)
+                        ,('account_invoice_line', '=', line.id)]
+                      , limit=1
+                      , context=context)
+                    for member_line in member_line_obj.browse(cr, uid, member_line_id, context=context):
+                      # NOTE: get member_line created in membership.account_invoice_line.create
+                        date_from = member_line.date_from
+                        date_to   = member_line.date_to
+                        if line.product_id.membership_date2date:
+                            date_from = context['date_from'] and datetime.strptime(context['date_from'], "%Y-%m-%d") or date.today()
+                            date_to   = date_from + relativedelta(months = +12) # TODO: parameterize this delta?
+                            date_from = date_from.strftime("%Y-%m-%d")
+                            date_to   = date_to  .strftime("%Y-%m-%d")
+                        member_line_obj.write(cr, uid, member_line.id
+                          , {'date_from': date_from
+                            ,'date_to'  : date_to
+                            }
+                          , context=context)
                     if line.product_id.membership_grouped:
                         if line.invoice_id.partner_id.associate_members:
                             for associate_member in line.invoice_id.partner_id.associate_members:
@@ -107,15 +129,35 @@ class account_invoice_line(osv.osv):
         line = self.browse(cr, uid, res, context=context)
 
         if line.invoice_id.type == 'out_invoice' and line.product_id and line.product_id.membership:
-            date_from = line.product_id.membership_date_from
-            date_to = line.product_id.membership_date_to
-            if line.invoice_id.date_invoice > date_from and line.invoice_id.date_invoice < date_to:
-                date_from = line.invoice_id.date_invoice
+            member_line_id = member_line_obj.search(cr, uid
+              , [('partner'             , '=', line.invoice_id.partner_id.id)
+                ,('account_invoice_line', '=', line.id)]
+              , limit=1
+              , context=context)
+            for member_line in member_line_obj.browse(cr, uid, member_line_id, context=context):
+              # NOTE: get member_line created in membership.account_invoice_line.create
+                date_from = member_line.date_from
+                date_to   = member_line.date_to
+                if line.product_id.membership_date2date:
+                    print "DEV: line.product_id.membership_date2date"
+                    date_from = context['date_from'] and datetime.strptime(context['date_from'], "%Y-%m-%d") or date.today()
+                    date_to   = date_from + relativedelta(months = +12) # TODO: parameterize this delta?
+                    date_from = date_from.strftime("%Y-%m-%d")
+                    date_to   = date_to  .strftime("%Y-%m-%d")
+                print ("DEV: date_from: %s" % str(date_from))
+                print ("DEV: date_to  : %s" % str(date_to))
+                member_line_obj.write(cr, uid, member_line.id
+                  , {'date_from': date_from
+                    ,'date_to'  : date_to
+                    }
+                  , context=context)
             partners = [line.invoice_id.partner_id]
             if line.product_id.membership_grouped and line.invoice_id.partner_id.associate_members:
                 partners.extend(line.invoice_id.partner_id.associate_members)
                 #Adding membership lines just for associate partners
                 for associate_member in line.invoice_id.partner_id.associate_members:
+                    print ("DEV: [associate] date_from: %s" % str(date_from))
+                    print ("DEV: [associate] date_to  : %s" % str(date_to))
                     member_line_obj.create(cr, uid, {
                         'partner': associate_member.id,
                         'membership_id': line.product_id.id,