[IMP] point_of_sale: opened sessions list

In order to avoid a rescue session opened for ages, the point of sale dashboard also shows if there are more than one opened session at the same time.

task-2492631

addons/point_of_sale/models/pos_config.py

@@ -162,6 +162,7 @@ class PosConfig(models.Model):
     session_ids = fields.One2many('pos.session', 'config_id', string='Sessions')
     current_session_id = fields.Many2one('pos.session', compute='_compute_current_session', string="Current Session")
     current_session_state = fields.Char(compute='_compute_current_session')
+    number_of_opened_session = fields.Integer(string="Number of Opened Session", compute='_compute_current_session')
     last_session_closing_cash = fields.Float(compute='_compute_last_session')
     last_session_closing_date = fields.Date(compute='_compute_last_session')
     last_session_closing_cashbox = fields.Many2one('account.bank.statement.cashbox', compute='_compute_last_session')
@@ -268,6 +269,7 @@ class PosConfig(models.Model):
             opened_sessions = pos_config.session_ids.filtered(lambda s: not s.state == 'closed')
             session = pos_config.session_ids.filtered(lambda s: not s.state == 'closed' and not s.rescue)
             # sessions ordered by id desc
+            pos_config.number_of_opened_session = len(opened_sessions)
             pos_config.has_active_session = opened_sessions and True or False
             pos_config.current_session_id = session and session[0].id or False
             pos_config.current_session_state = session and session[0].state or False
@@ -665,6 +667,15 @@ class PosConfig(models.Model):
             'type': 'ir.actions.act_window',
         }
 
+    def open_opened_session_list(self):
+        return {
+            'name': _('Opened Sessions'),
+            'res_model': 'pos.session',
+            'view_mode': 'tree,kanban,form',
+            'type': 'ir.actions.act_window',
+            'domain': [('state', '!=', 'closed'), ('config_id', '=', self.id)]
+        }
+
     # All following methods are made to create data needed in POS, when a localisation
     # is installed, or if POS is installed on database having companies that already have
     # a localisation installed

addons/point_of_sale/views/point_of_sale_dashboard.xml

@@ -60,6 +60,7 @@
                 <field name="pos_session_state"/>
                 <field name="pos_session_duration"/>
                 <field name="currency_id"/>
+                <field name="number_of_opened_session"/>
                 <templates>
                     <t t-name="kanban-box">
                         <div>
@@ -119,11 +120,16 @@
                                                 <span><field name="last_session_closing_cash" widget="monetary"/></span>
                                             </div>
                                         </div>
+
+                                        <button t-if="record.number_of_opened_session.value &gt; 1" class="btn btn-link" style="padding-left:0; text-decoration: underline" name="open_opened_session_list" type="object">
+                                            There are <t t-esc="record.number_of_opened_session.value"/> open sessions
+                                        </button>
                                     </div>
                                 </div>
                                 <div style="text-align:right;">
                                     <field name="current_user_id" widget="many2one_avatar_user"/>
                                 </div>
+
                             </div><div class="container o_kanban_card_manage_pane dropdown-menu" role="menu">
                                 <div class="row">
                                     <div class="col-6 o_kanban_card_manage_section o_kanban_manage_view">