Handle empty buckets when checking question of type "przyporzadkuj"

[edumed.git] / wtem / models.py

diff --git a/wtem/models.py b/wtem/models.py
index bef8b7c..69affe4 100644 (file)
--- a/wtem/models.py
+++ b/wtem/models.py
@@ -1,14 +1,19 @@
 import random
 import string
+import os
 
 from django.db import models
 from django.contrib.auth.models import User
 from django.core.exceptions import ValidationError
+from django.utils import simplejson
 from django.utils.translation import ugettext as _
 from jsonfield import JSONField
 
 from contact.models import Contact
 
+f = file(os.path.dirname(__file__) + '/fixtures/exercises.json')
+exercises = simplejson.loads(f.read())
+f.close()
 
 DEBUG_KEY = '12345'
 
@@ -21,6 +26,7 @@ class Submission(models.Model):
     answers = models.CharField(max_length = 65536, null = True, blank = True)
     key_sent = models.BooleanField(default = False)
     marks = JSONField()
+    examiners = models.ManyToManyField(User, null = True, blank = True)
 
     def __unicode__(self):
         return ', '.join((self.last_name, self.first_name, self.email))
@@ -64,6 +70,75 @@ class Submission(models.Model):
             del self.marks[user_id][exercise_id]
 
 
+    def get_exercise_marks_by_examiner(self, exercise_id):
+        marks = dict()
+        for examiner_id, examiner_marks in self.marks.items():
+            mark = examiner_marks.get(exercise_id, None)
+            if mark is not None:
+                marks[examiner_id] = mark
+        return marks
+
+    def get_final_exercise_mark(self, exercise_id):
+        exercise = exercises[int(exercise_id)-1]
+        if exercise_checked_manually(exercise):
+            marks_by_examiner = self.get_exercise_marks_by_examiner(exercise_id)
+            if len(marks_by_examiner):
+                return max(map(int, marks_by_examiner.values()))
+            else:
+                return None
+        else:
+            if not self.answers:
+                return None
+            answer = simplejson.loads(self.answers)[exercise_id]['closed_part']
+            t = exercise['type']
+            if t == 'edumed_uporzadkuj':
+                return exercise['points'] if map(int, answer) == exercise['answer'] else 0
+            if t == 'edumed_przyporzadkuj':
+                toret = 0
+                for bucket_id, items in answer.items():
+                    for item_id in items:
+                        if int(item_id) == exercise['answer'].get(bucket_id, None): # @@ We assume only one item per bucker for now...
+                            toret += exercise['points_per_hit']
+                return toret
+            if t == 'edumed_wybor':
+                if len(exercise['answer']) == 1:
+                    if len(answer) and int(answer[0]) == exercise['answer'][0]:
+                        return exercise['points']
+                    else:
+                        return 0
+                else:
+                    toret = 0
+                    for id in map(int, answer):
+                        if id in exercise['answer']:
+                            toret += exercise['points_per_hit']
+                    return toret
+            if t == 'edumed_prawdafalsz':
+                toret = 0
+                for idx, statement in enumerate(exercise['statements']):
+                    if answer[idx] == 'true':
+                        given = True
+                    elif answer[idx] == 'false':
+                        given = False
+                    else:
+                        given = None
+                    if given == statement[1]:
+                        toret += exercise['points_per_hit']
+                return toret
+            raise NotImplementedError
+
+    @property
+    def final_result(self):
+        final = 0
+        for exercise_id in map(str,range(1, len(exercises) + 1)):
+            mark = self.get_final_exercise_mark(exercise_id)
+            if mark is not None:
+                final += mark
+        return final
+
+    @property
+    def final_result_as_string(self):
+        return ('%.2f' % self.final_result).rstrip('0').rstrip('.')
+
 class Attachment(models.Model):
     submission = models.ForeignKey(Submission)
     exercise_id = models.IntegerField()
@@ -82,4 +157,8 @@ class Assignment(models.Model):
                 raise ValidationError(_('Invalid exercise id: %s' % exercise))
 
     def __unicode__(self):
-        return self.user.username + ': ' + ','.join(map(str,self.exercises))
\ No newline at end of file
+        return self.user.username + ': ' + ','.join(map(str,self.exercises))
+
+
+def exercise_checked_manually(exercise):
+    return (exercise['type'] in ('open', 'file_upload')) or 'open_part' in exercise
\ No newline at end of file