change tracker for multiple business unit.

for now , the business unit is noy yet calculated.
this version is for test bounce
id_bu should be calculate 'host@port/databasename'
the sample here in code is :
id_bu='vmd:8069/camp'

marketing_campaign_tracker.py

@@ -22,6 +22,7 @@
 
 from osv import osv, fields
 from replace import insert_tracker_in_html, insert_tracker_in_text
+import md5
 
 class hooked_email_template(osv.osv):
     """overrides the base email template to hook the URL tracker
@@ -36,6 +37,8 @@
         ir_attachment = self.pool.get('ir.attachment')
         template = self.browse(cr, uid, template_id, context)
         values = self.generate_email(cr, uid, template_id, res_id, context=context)
+
+        ## Change from original send_mail
         if context.get('use_tracker', False):
             # here we need to use tracker so let's do it
             tracker_base = context.get('tracker_base')
@@ -39,6 +42,10 @@
         if context.get('use_tracker', False):
             # here we need to use tracker so let's do it
             tracker_base = context.get('tracker_base')
+            #### TO DO RULES FOR GENERE id_bu !!!
+            id_bu='vmd:8069/camp'
+            tracker_base+='/'+md5.md5(id_bu).hexdigest()
+
             if values['body_text']:
                 values['body_text'], tracks = insert_tracker_in_text(
                     values['body_text'], 
@@ -55,6 +62,8 @@
                 # create a trackitem for each URL that is replaced
                 trackitem.create(cr, uid, trackvalues, context=None)
 
+        ## End Change from original send_mail
+
         #values = self.add_tracker(cr, uid, template_id, res_id, context=context)
         attachments = values.pop('attachments') or {}
         message_id = mail_message.create(cr, uid, values, context=context)