[IMP] im_livechat: unpin old sessions in the autovacuum cron

addons/im_livechat/models/ir_autovacuum.py

@@ -10,4 +10,5 @@ class AutoVacuum(models.AbstractModel):
     @api.model
     def power_on(self, *args, **kwargs):
         self.pool['mail.channel'].remove_empty_livechat_sessions()
+        self.pool['mail.channel.partner'].unpin_old_livechat_sessions()
         return super(AutoVacuum, self).power_on(*args, **kwargs)

addons/im_livechat/models/mail_channel.py

@@ -1,6 +1,24 @@
 # -*- coding: utf-8 -*-
 from openerp import api, fields, models
-from openerp import SUPERUSER_ID
+
+
+class ChannelPartner(models.Model):
+    _inherit = 'mail.channel.partner'
+
+    @api.model
+    def unpin_old_livechat_sessions(self):
+        """ Unpin livechat sessions with no activity for at least one day to
+            clean the operator's interface """
+        self.env.cr.execute("""
+            UPDATE mail_channel_partner
+            SET is_pinned = false
+            WHERE id in (
+                SELECT cp.id FROM mail_channel_partner cp
+                INNER JOIN mail_channel c on c.id = cp.channel_id
+                WHERE c.channel_type = 'livechat' AND cp.is_pinned is true AND
+                    cp.write_date < current_timestamp - interval '1 day'
+            )
+        """)
 
 
 class MailChannel(models.Model):