[IMP] lunch: account balance on new order view

addons/lunch/models/lunch.py

@@ -4,7 +4,7 @@ import datetime
 
 from openerp import models, fields, api, _
 import openerp.addons.decimal_precision as dp
-from openerp.exceptions import UserError
+from openerp.exceptions import AccessError, UserError
 
 
 class LunchOrder(models.Model):
@@ -36,6 +36,8 @@ class LunchOrder(models.Model):
                                          compute='_compute_get_previous_order_ids')
     company_id = fields.Many2one('res.company', related='user_id.company_id', store=True)
     currency_id = fields.Many2one('res.currency', related='company_id.currency_id', readonly=True, store=True)
+    cash_move_balance = fields.Monetary(compute='_compute_cash_move_balance', multi='cash_move_balance')
+    balance_visible = fields.Boolean(compute='_compute_cash_move_balance', multi='cash_move_balance')
 
     @api.one
     @api.depends('order_line_ids')
@@ -80,7 +82,7 @@ class LunchOrder(models.Model):
         prev_cashmove = self.env['lunch.cashmove'].search([('user_id', '=', self.user_id.id)])
         balance = sum(cashmove.amount for cashmove in prev_cashmove)
 
-        if self.total > balance:
+        if self.total > 0 and self.total > balance:
             return {
                 'warning': {
                     'title': _('Insufficient balance'),
@@ -88,6 +90,24 @@ class LunchOrder(models.Model):
                 },
             }
 
+    @api.one
+    @api.depends('user_id')
+    def _compute_cash_move_balance(self):
+        # To avoid hardcoding who can(not) see a given user's cash moves, searching
+        # in superuser then trying to access it in current user is the only way to
+        # know whether we have the right to see this or not. Trying to search with
+        # the current user directly would simply hide the records we are not supposed
+        # to see, preventing us from knowing whether we can't see those cash moves due
+        # to security reasons or we can see them but there aren't any for this user.
+        try:
+            domain = [('user_id', '=', self.user_id.id)]
+            lunch_move_ids = self.env['lunch.cashmove'].sudo().search(domain).sudo(self.env.uid)
+            self.cash_move_balance = sum(lunch_move_ids.mapped('amount'))
+            self.balance_visible = True
+        except AccessError:
+            self.cash_move_balance = 0
+            self.balance_visible = False
+
     @api.one
     @api.constrains('date')
     def _check_date(self):

addons/lunch/views/lunch_views.xml

@@ -172,6 +172,7 @@
               </p>
             </field>
         </record>
+
         <menuitem name="Your Lunch Account" parent="menu_lunch_title" id="lunch_cashmove_menu_form" action="lunch_cashmove_action_account" sequence="3"/>
 
         <!--Action for Administrate Orders group by supplier-->
@@ -367,13 +368,29 @@
                         <field name='state' widget='statusbar' statusbar_visible='new,confirmed'/>
                     </header>
                     <sheet>
+                        <field name="balance_visible" invisible="1"/>
+                        <div class="alert alert-warning" role="alert" attrs="{'invisible': ['|',('cash_move_balance', '&gt;', 0),('balance_visible', '=', False)]}">
+                            Warning : Your balance is insufficient.
+                        </div>
                         <group>
                             <group>
                                 <field name='user_id'
                                 context="{'default_groups_ref': ['base.group_user', 'base.group_partner_manager', 'lunch.group_lunch_user']}"/>
+                                <field name='date'/>
                             </group>
                             <group>
-                                <field name='date'/>
+                                <div class="oe_button_box" name="button_box">
+                                    <button class="oe_stat_button"
+                                        attrs="{'invisible': [('balance_visible', '=', False)]}"
+                                        name="%(lunch_cashmove_action_account)d"
+                                        icon="fa-money"
+                                        type="action">
+                                        <div class="o_form_field o_stat_info">
+                                            <span class="o_stat_value"><field name="cash_move_balance" widget="monetary"/></span>
+                                            <span class="o_stat_text">Balance</span>
+                                        </div>
+                                    </button>
+                                </div>
                             </group>
                         </group>
                         <field name='alerts' attrs="{'invisible': ['|',('state','!=','new'),('alerts','=',False)]}" class="oe_inline alert alert-danger"/>