time-based competition state + smart cache

[edumed.git] / wtem / models.py

diff --git a/wtem/models.py b/wtem/models.py
index 6440e70..390687f 100644 (file)
--- a/wtem/models.py
+++ b/wtem/models.py
@@ -4,6 +4,10 @@ import string
 import os
 import json
 
+from datetime import datetime
+
+import pytz as pytz
+from django.conf import settings
 from django.core.validators import validate_email
 from django.db import models
 from django.contrib.auth.models import User
@@ -23,6 +27,8 @@ f.close()
 
 DEBUG_KEY = 'smerfetka159'
 
+tz = pytz.timezone(settings.TIME_ZONE)
+
 
 def get_exercise_by_id(exercise_id):
     return [e for e in exercises if str(e['id']) == str(exercise_id)][0]
@@ -34,6 +40,10 @@ def make_key(length):
         for i in range(length))
 
 
+def tuple2dt(time_tuple):
+    return tz.localize(datetime(*time_tuple))
+
+
 class CompetitionState(models.Model):
     """singleton"""
     BEFORE = 'before'
@@ -46,9 +56,19 @@ class CompetitionState(models.Model):
     )
     state = models.CharField(choices=STATE_CHOICES, max_length=16)
 
+    start = tuple2dt(settings.OLIMPIADA_START)
+    end = tuple2dt(settings.OLIMPIADA_END)
+
     @classmethod
     def get_state(cls):
-        return cls.objects.get().state
+        now = timezone.now()
+        if now < cls.start:
+            return cls.BEFORE
+        elif now < cls.end:
+            return cls.DURING
+        else:
+            return cls.AFTER
+        # return cls.objects.get().state
 
 
 class Submission(models.Model):
@@ -96,8 +116,8 @@ class Submission(models.Model):
 
     def shuffled_exercise_ids(self):
         exercise_ids = [e['id'] for e in exercises]
-        random.seed(self.random_seed)
-        random.shuffle(exercise_ids)
+        seeded_random = random.Random(self.random_seed)
+        seeded_random.shuffle(exercise_ids)
         return exercise_ids
 
     def current_exercise(self):