Calculate prize of rental

billard/models.py

@@ -1,6 +1,8 @@
 import uuid
 from django.db import models
 from django.contrib.auth.models import User
+from datetime import datetime
+from . import utils
 
 
 class LocationData(models.Model):
@@ -48,14 +50,20 @@ class Client(models.Model):
     desk2_prize_nt = models.DecimalField(max_digits=4, decimal_places=2, blank=True, null=True)
     desk2_prize_ht = models.DecimalField(max_digits=4, decimal_places=2, blank=True, null=True)
 
-    def accounting_for(self, desk_no):
+    def accounting_for(self, desk_no, pht, pnt):
-        return Accounting.objects.filter(client_id=self.id, desk_no=desk_no)[:2][::-1]
+        t = Accounting.objects.filter(client_id=self.id, desk_no=desk_no)[:3][::-1]
+        a = t[t.__len__() - 1]
+        if a.time_to is None:
+            prize = utils.get_prize_for(start=a.time_from, end=datetime.now(), pph=pht)
+            if prize != a.prize:
+                a.prize = prize
+        return t
 
     def accounting_1(self):
-        return self.accounting_for(1)
+        return self.accounting_for(1, self.desk1_prize_ht, self.desk1_prize_nt)
 
     def accounting_2(self):
-        return self.accounting_for(2)
+        return self.accounting_for(2, self.desk2_prize_ht, self.desk2_prize_nt)
 
     def __str__(self):
         return '{}, {}'.format(self.location.name, self.uuid)

billard/templates/billard/index.html

@@ -29,7 +29,7 @@
             <tr>
                 <td>{{ acc.time_from|date:"d.m.Y H:i:s" }}</td>
                 <td>{% if acc.time_to is not None %}{{ acc.time_to|date:"d.m.Y H:i:s" }}{% endif %}</td>
-                <td>{% if acc.prize is not None %}{{ acc.prize }}{% endif %}</td>
+                <td>{% if acc.prize is not None %}{{ acc.prize|floatformat:2 }}{% endif %}</td>
             </tr>
 {% endfor %}
         </table>
@@ -47,7 +47,7 @@
             <tr>
                 <td>{{ acc.time_from|date:"d.m.Y H:i:s" }}</td>
                 <td>{% if acc.time_to is not None %}{{ acc.time_to|date:"d.m.Y H:i:s" }}{% endif %}</td>
-                <td>{% if acc.prize is not None %}{{ acc.prize }}{% endif %}</td>
+                <td>{% if acc.prize is not None %}{{ acc.prize|floatformat:2 }}{% endif %}</td>
             </tr>
 {% endfor %}
         </table>

billard/utils.py

@@ -0,0 +1,24 @@
+from datetime import datetime, date, time
+
+
+def get_prize_for(start, end=datetime.now(), pph=0):
+    '''
+    calculate prize of billard table rental
+
+    :param start: start datetime of rental
+    :param end: end datetime of rental
+    :param pph: prize per hour of rental
+    :return: the calculated prize of rental
+    '''
+    pps = pph / 3600
+    time = (end - start).seconds
+    prize = round((pps * time), 1)
+    print(prize)
+    return prize
+
+
+if __name__ == '__main__':
+    d = date(2017, 2, 5)
+    t = time(16, 00)
+    start = datetime.combine(d, t)
+    get_prize_for(start=start, pph=8.5)