Add problem vote

dmoj/settings.py

@@ -162,6 +162,7 @@ else:
                     'children': [
                         'judge.ProblemGroup',
                         'judge.ProblemType',
+                        'judge.ProblemPointsVote',
                     ],
                 },
                 {

dmoj/urls.py

@@ -139,6 +139,8 @@ urlpatterns = [
         url(r'^/tickets$', ticket.ProblemTicketListView.as_view(), name='problem_ticket_list'),
         url(r'^/tickets/new$', ticket.NewProblemTicketView.as_view(), name='new_problem_ticket'),
 
+        url(r'^/vote$', problem.Vote.as_view(), name='vote'),
+        
         url(r'^/manage/submission', include([
             url('^$', problem_manage.ManageProblemSubmissionView.as_view(), name='problem_manage_submissions'),
             url('^/action$', problem_manage.ActionSubmissionsView.as_view(), name='problem_submissions_action'),

judge/admin/__init__.py

@@ -5,7 +5,7 @@ from judge.admin.comments import CommentAdmin
 from judge.admin.contest import ContestAdmin, ContestParticipationAdmin, ContestTagAdmin
 from judge.admin.interface import BlogPostAdmin, LicenseAdmin, LogEntryAdmin, NavigationBarAdmin
 from judge.admin.organization import OrganizationAdmin, OrganizationRequestAdmin
-from judge.admin.problem import ProblemAdmin
+from judge.admin.problem import ProblemAdmin, ProblemPointsVoteAdmin
 from judge.admin.profile import ProfileAdmin
 from judge.admin.runtime import JudgeAdmin, LanguageAdmin
 from judge.admin.submission import SubmissionAdmin
@@ -13,7 +13,7 @@ from judge.admin.taxon import ProblemGroupAdmin, ProblemTypeAdmin
 from judge.admin.ticket import TicketAdmin
 from judge.models import BlogPost, Comment, CommentLock, Contest, ContestParticipation, \
     ContestTag, Judge, Language, License, MiscConfig, NavigationBar, Organization, \
-    OrganizationRequest, Problem, ProblemGroup, ProblemType, Profile, Submission, Ticket
+    OrganizationRequest, Problem, ProblemGroup, ProblemPointsVote, ProblemType, Profile, Submission, Ticket
 
 admin.site.register(BlogPost, BlogPostAdmin)
 admin.site.register(Comment, CommentAdmin)
@@ -31,6 +31,7 @@ admin.site.register(Organization, OrganizationAdmin)
 admin.site.register(OrganizationRequest, OrganizationRequestAdmin)
 admin.site.register(Problem, ProblemAdmin)
 admin.site.register(ProblemGroup, ProblemGroupAdmin)
+admin.site.register(ProblemPointsVote, ProblemPointsVoteAdmin)
 admin.site.register(ProblemType, ProblemTypeAdmin)
 admin.site.register(Profile, ProfileAdmin)
 admin.site.register(Submission, SubmissionAdmin)

judge/admin/problem.py

@@ -236,3 +236,17 @@ class ProblemAdmin(VersionAdmin):
         if form.cleaned_data.get('change_message'):
             return form.cleaned_data['change_message']
         return super(ProblemAdmin, self).construct_change_message(request, form, *args, **kwargs)
+
+
+class ProblemPointsVoteAdmin(admin.ModelAdmin):
+    list_display = ('points', 'voter', 'problem', 'vote_time')
+    search_fields = ('voter', 'problem')
+    readonly_fields = ('voter', 'problem', 'vote_time')
+
+    def has_change_permission(self, request, obj=None):
+        if obj is None:
+            return request.user.has_perm('judge.edit_own_problem')
+        return obj.problem.is_editable_by(request.user)
+
+    def lookup_allowed(self, key, value):
+        return super().lookup_allowed(key, value) or key in ('problem__code',)

judge/admin/profile.py

@@ -45,7 +45,7 @@ class TimezoneFilter(admin.SimpleListFilter):
 
 class ProfileAdmin(VersionAdmin):
     fields = ('user', 'display_rank', 'about', 'organizations', 'timezone', 'language', 'ace_theme',
-              'math_engine', 'last_access', 'ip', 'mute', 'is_unlisted', 'notes', 'is_totp_enabled', 'user_script',
+              'math_engine', 'last_access', 'ip', 'mute', 'is_unlisted', 'is_banned_problem_voting', 'notes', 'is_totp_enabled', 'user_script',
               'current_contest')
     readonly_fields = ('user',)
     list_display = ('admin_user_admin', 'email', 'is_totp_enabled', 'timezone_full',

judge/forms.py

@@ -12,7 +12,7 @@ from django.urls import reverse_lazy
 from django.utils.translation import gettext_lazy as _
 
 from django_ace import AceWidget
-from judge.models import Contest, Language, Organization, PrivateMessage, Problem, Profile, Submission
+from judge.models import Contest, Language, Organization, PrivateMessage, Problem, ProblemPointsVote, Profile, Submission
 from judge.utils.subscription import newsletter_id
 from judge.widgets import HeavyPreviewPageDownWidget, MathJaxPagedownWidget, PagedownWidget, Select2MultipleWidget, \
     Select2Widget
@@ -161,4 +161,10 @@ class ContestCloneForm(Form):
         key = self.cleaned_data['key']
         if Contest.objects.filter(key=key).exists():
             raise ValidationError(_('Contest with key already exists.'))
-        return key
+        return key
+
+
+class ProblemPointsVoteForm(ModelForm):
+    class Meta:
+        model = ProblemPointsVote
+        fields = ['points']

judge/migrations/0120_auto_20220306_1124.py

@@ -0,0 +1,34 @@
+# Generated by Django 2.2.25 on 2022-03-06 04:24
+
+import django.core.validators
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('judge', '0119_auto_20220306_0512'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='profile',
+            name='is_banned_problem_voting',
+            field=models.BooleanField(default=False, help_text="User will not be able to vote on problems' point values.", verbose_name='banned from voting'),
+        ),
+        migrations.CreateModel(
+            name='ProblemPointsVote',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('points', models.IntegerField(help_text='The amount of points you think this problem deserves.', validators=[django.core.validators.MinValueValidator(100), django.core.validators.MaxValueValidator(600)], verbose_name='proposed point value')),
+                ('vote_time', models.DateTimeField(auto_now_add=True, verbose_name='The time this vote was cast')),
+                ('problem', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='problem_points_votes', to='judge.Problem')),
+                ('voter', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='problem_points_votes', to='judge.Profile')),
+            ],
+            options={
+                'verbose_name': 'vote',
+                'verbose_name_plural': 'votes',
+            },
+        ),
+    ]

judge/models/__init__.py

@@ -7,7 +7,7 @@ from judge.models.contest import Contest, ContestMoss, ContestParticipation, Con
 from judge.models.interface import BlogPost, MiscConfig, NavigationBar, validate_regex
 from judge.models.message import PrivateMessage, PrivateMessageThread
 from judge.models.problem import LanguageLimit, License, Problem, ProblemClarification, ProblemGroup, \
-    ProblemTranslation, ProblemType, Solution, TranslatedProblemForeignKeyQuerySet, TranslatedProblemQuerySet
+    ProblemTranslation, ProblemType, Solution, TranslatedProblemForeignKeyQuerySet, TranslatedProblemQuerySet, ProblemPointsVote
 from judge.models.problem_data import CHECKERS, ProblemData, ProblemTestCase, problem_data_storage, \
     problem_directory_file
 from judge.models.profile import Organization, OrganizationRequest, Profile, Friend

judge/models/problem.py

@@ -375,6 +375,25 @@ class Problem(models.Model):
 
     save.alters_data = True
 
+    def can_vote(self, user):
+        if not user.is_authenticated:
+            return False
+
+        # If the user is in contest, nothing should be shown.
+        if user.profile.current_contest:
+            return False
+
+        # If the user is not allowed to vote
+        if user.profile.is_unlisted or user.profile.is_banned_problem_voting:
+            return False
+
+        # If the user is banned from submitting to the problem.
+        if self.banned_users.filter(pk=user.pk).exists():
+            return False
+
+        # If the user has a full AC submission to the problem (solved the problem).
+        return self.submission_set.filter(user=user.profile, result='AC', points=F('problem__points')).exists()
+
     class Meta:
         permissions = (
             ('see_private_problem', 'See hidden problems'),
@@ -448,3 +467,29 @@ class Solution(models.Model):
         )
         verbose_name = _('solution')
         verbose_name_plural = _('solutions')
+
+
+class ProblemPointsVote(models.Model):
+    points = models.IntegerField(
+        verbose_name=_('proposed point value'),
+        help_text=_('The amount of points you think this problem deserves.'),
+        validators=[
+            MinValueValidator(100),
+            MaxValueValidator(600),
+        ],
+    )
+
+    voter = models.ForeignKey(Profile, related_name='problem_points_votes', on_delete=CASCADE, db_index=True)
+    problem = models.ForeignKey(Problem, related_name='problem_points_votes', on_delete=CASCADE, db_index=True)
+    vote_time = models.DateTimeField(
+        verbose_name=_('The time this vote was cast'),
+        auto_now_add=True,
+        blank=True,
+    )
+
+    class Meta:
+        verbose_name = _('vote')
+        verbose_name_plural = _('votes')
+
+    def __str__(self):
+        return f'{self.voter}: {self.points} for {self.problem.code}'

judge/models/profile.py

@@ -98,6 +98,11 @@ class Profile(models.Model):
                                default=False)
     is_unlisted = models.BooleanField(verbose_name=_('unlisted user'), help_text=_('User will not be ranked.'),
                                       default=False)
+    is_banned_problem_voting = models.BooleanField(
+        verbose_name=_('banned from voting'),
+        help_text=_("User will not be able to vote on problems' point values."),
+        default=False,
+    )
     rating = models.IntegerField(null=True, default=None)
     user_script = models.TextField(verbose_name=_('user script'), default='', blank=True, max_length=65536,
                                    help_text=_('User-defined JavaScript for site customization.'))

judge/views/problem.py

@@ -12,7 +12,7 @@ from django.core.exceptions import ObjectDoesNotExist, PermissionDenied
 from django.db import transaction
 from django.db.models import Count, F, Prefetch, Q, Sum, Case, When, IntegerField
 from django.db.utils import ProgrammingError
-from django.http import Http404, HttpResponse, HttpResponseForbidden, HttpResponseRedirect
+from django.http import Http404, HttpResponse, HttpResponseForbidden, HttpResponseRedirect, JsonResponse
 from django.shortcuts import get_object_or_404, render
 from django.template.loader import get_template
 from django.urls import reverse
@@ -26,10 +26,10 @@ from django.views.generic.base import TemplateResponseMixin
 from django.views.generic.detail import SingleObjectMixin
 
 from judge.comments import CommentedDetailView
-from judge.forms import ProblemCloneForm, ProblemSubmitForm
+from judge.forms import ProblemCloneForm, ProblemSubmitForm, ProblemPointsVoteForm
 from judge.models import ContestProblem, ContestSubmission, Judge, Language, Problem, ProblemClarification, \
-    ProblemGroup, ProblemTranslation, ProblemType, RuntimeVersion, Solution, Submission, SubmissionSource, \
+    ProblemGroup, ProblemTranslation, ProblemType, ProblemPointsVote, RuntimeVersion, Solution, Submission, SubmissionSource, \
-    TranslatedProblemForeignKeyQuerySet, Organization
+    TranslatedProblemForeignKeyQuerySet, Organization 
 from judge.pdf_problems import DefaultPdfMaker, HAS_PDF
 from judge.utils.diggpaginator import DiggPaginator
 from judge.utils.opengraph import generate_opengraph
@@ -216,8 +216,65 @@ class ProblemDetail(ProblemMixin, SolvedProblemMixin, DetailView):
                                           context['description'], 'problem')
         context['meta_description'] = self.object.summary or metadata[0]
         context['og_image'] = self.object.og_image or metadata[1]
+
+        context['can_vote'] = self.object.can_vote(user)
+        if context['can_vote']:
+            try:
+                context['vote'] = ProblemPointsVote.objects.get(voter=user.profile, problem=self.object)
+            except ObjectDoesNotExist:
+                context['vote'] = None
+        else:
+            context['vote'] = None
+
+        all_votes = list(self.object.problem_points_votes.order_by('points').values_list('points', flat=True))
+
+        context['has_votes'] = len(all_votes) > 0
+
+        # If the user is not currently in contest.
+        if not user.is_authenticated or user.profile.current_contest is None:
+            context['all_votes'] = all_votes
+
+        context['max_possible_vote'] = 600
+        context['min_possible_vote'] = 100
         return context
 
+class DeleteVote(ProblemMixin, SingleObjectMixin, View):
+    def get(self, request, *args, **kwargs):
+        return HttpResponseForbidden(status=405, content_type='text/plain')
+
+    def post(self, request, *args, **kwargs):
+        self.object = self.get_object()
+        if not request.user.is_authenticated:
+            return HttpResponseForbidden('Not signed in.', content_type='text/plain')
+        elif self.object.can_vote(request.user):
+            ProblemPointsVote.objects.filter(voter=request.profile, problem=self.object).delete()
+            return HttpResponse('success', content_type='text/plain')
+        else:
+            return HttpResponseForbidden('Not allowed to delete votes on this problem.', content_type='text/plain')
+
+
+class Vote(ProblemMixin, SingleObjectMixin, View):
+    def get(self, request, *args, **kwargs):
+        return HttpResponseForbidden(status=405, content_type='text/plain')
+
+    def post(self, request, *args, **kwargs):
+        self.object = self.get_object()
+        if not self.object.can_vote(request.user):  # Not allowed to vote for some reason.
+            return HttpResponseForbidden('Not allowed to vote on this problem.', content_type='text/plain')
+
+        form = ProblemPointsVoteForm(request.POST)
+        if form.is_valid():
+            with transaction.atomic():
+                # Delete any pre existing votes.
+                ProblemPointsVote.objects.filter(voter=request.profile, problem=self.object).delete()
+                vote = form.save(commit=False)
+                vote.voter = request.profile
+                vote.problem = self.object
+                vote.save()
+            return JsonResponse({'points': vote.points})
+        else:
+            return JsonResponse(form.errors, status=400)
+
 
 class ProblemComments(ProblemMixin, TitleMixin, CommentedDetailView):
     context_object_name = 'problem'

locale/vi/LC_MESSAGES/django.po

@@ -2,7 +2,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: lqdoj2\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-01-10 18:14+0700\n"
+"POT-Creation-Date: 2022-03-10 12:30+0700\n"
 "PO-Revision-Date: 2021-07-20 03:44\n"
 "Last-Translator: Icyene\n"
 "Language-Team: Vietnamese\n"
@@ -20,7 +20,7 @@ msgstr ""
 
 #: chat_box/models.py:23 chat_box/models.py:41 chat_box/models.py:47
 #: judge/admin/interface.py:110 judge/models/contest.py:403
-#: judge/models/contest.py:528 judge/models/profile.py:215
+#: judge/models/contest.py:528 judge/models/profile.py:220
 msgid "user"
 msgstr "người dùng"
 
@@ -36,71 +36,71 @@ msgstr "nội dung bình luận"
 msgid "last seen"
 msgstr "xem lần cuối"
 
-#: chat_box/views.py:29 templates/chat/chat.html:4 templates/chat/chat.html:541
+#: chat_box/views.py:29 templates/chat/chat.html:4 templates/chat/chat.html:548
 msgid "Chat Box"
 msgstr "Chat Box"
 
-#: dmoj/settings.py:358
+#: dmoj/settings.py:359
 msgid "German"
 msgstr ""
 
-#: dmoj/settings.py:359
+#: dmoj/settings.py:360
 msgid "English"
 msgstr ""
 
-#: dmoj/settings.py:360
+#: dmoj/settings.py:361
 msgid "Spanish"
 msgstr ""
 
-#: dmoj/settings.py:361
+#: dmoj/settings.py:362
 msgid "French"
 msgstr ""
 
-#: dmoj/settings.py:362
+#: dmoj/settings.py:363
 msgid "Croatian"
 msgstr ""
 
-#: dmoj/settings.py:363
+#: dmoj/settings.py:364
 msgid "Hungarian"
 msgstr ""
 
-#: dmoj/settings.py:364
+#: dmoj/settings.py:365
 msgid "Japanese"
 msgstr ""
 
-#: dmoj/settings.py:365
+#: dmoj/settings.py:366
 msgid "Korean"
 msgstr ""
 
-#: dmoj/settings.py:366
+#: dmoj/settings.py:367
 msgid "Brazilian Portuguese"
 msgstr ""
 
-#: dmoj/settings.py:367
+#: dmoj/settings.py:368
 msgid "Romanian"
 msgstr ""
 
-#: dmoj/settings.py:368
+#: dmoj/settings.py:369
 msgid "Russian"
 msgstr ""
 
-#: dmoj/settings.py:369
+#: dmoj/settings.py:370
 msgid "Serbian (Latin)"
 msgstr ""
 
-#: dmoj/settings.py:370
+#: dmoj/settings.py:371
 msgid "Turkish"
 msgstr ""
 
-#: dmoj/settings.py:371
+#: dmoj/settings.py:372
 msgid "Vietnamese"
 msgstr "Tiếng Việt"
 
-#: dmoj/settings.py:372
+#: dmoj/settings.py:373
 msgid "Simplified Chinese"
 msgstr ""
 
-#: dmoj/settings.py:373
+#: dmoj/settings.py:374
 msgid "Traditional Chinese"
 msgstr ""
 
@@ -108,7 +108,7 @@ msgstr ""
 msgid "Login"
 msgstr "Đăng nhập"
 
-#: dmoj/urls.py:106 templates/base.html:249
+#: dmoj/urls.py:106 templates/base.html:251
 msgid "Home"
 msgstr "Trang chủ"
 
@@ -217,7 +217,7 @@ msgstr "Tính toán lại kết quả"
 msgid "username"
 msgstr "tên đăng nhập"
 
-#: judge/admin/contest.py:320 templates/base.html:337
+#: judge/admin/contest.py:320 templates/base.html:339
 msgid "virtual"
 msgstr "ảo"
 
@@ -587,9 +587,9 @@ msgstr "người bình luận"
 msgid "associated page"
 msgstr "trang tương ứng"
 
-#: judge/models/comment.py:46
+#: judge/models/comment.py:46 judge/models/problem.py:492
 msgid "votes"
-msgstr ""
+msgstr "bình chọn"
 
 #: judge/models/comment.py:48
 msgid "hide the comment"
@@ -607,7 +607,7 @@ msgstr "bình luận"
 msgid "comments"
 msgstr ""
 
-#: judge/models/comment.py:137 judge/models/problem.py:443
+#: judge/models/comment.py:137 judge/models/problem.py:462
 #, python-format
 msgid "Editorial for %s"
 msgstr ""
@@ -725,7 +725,7 @@ msgstr ""
 msgid "description"
 msgstr "mô tả"
 
-#: judge/models/contest.py:72 judge/models/problem.py:390
+#: judge/models/contest.py:72 judge/models/problem.py:409
 #: judge/models/runtime.py:138
 msgid "problems"
 msgstr "bài tập"
@@ -739,7 +739,7 @@ msgid "end time"
 msgstr "thời gian kết thúc"
 
 #: judge/models/contest.py:75 judge/models/problem.py:118
-#: judge/models/problem.py:414
+#: judge/models/problem.py:433
 msgid "time limit"
 msgstr "giới hạn thời gian"
 
@@ -1037,8 +1037,8 @@ msgid "contest participations"
 msgstr "lần tham gia kỳ thi"
 
 #: judge/models/contest.py:491 judge/models/contest.py:513
-#: judge/models/contest.py:554 judge/models/problem.py:389
+#: judge/models/contest.py:554 judge/models/problem.py:408
-#: judge/models/problem.py:394 judge/models/problem.py:412
+#: judge/models/problem.py:413 judge/models/problem.py:431
 #: judge/models/problem_data.py:40
 msgid "problem"
 msgstr "bài tập"
@@ -1176,7 +1176,7 @@ msgstr "mục cha"
 msgid "post title"
 msgstr "tiêu đề bài đăng"
 
-#: judge/models/interface.py:67 judge/models/problem.py:432
+#: judge/models/interface.py:67 judge/models/problem.py:451
 msgid "authors"
 msgstr "tác giả"
 
@@ -1184,7 +1184,7 @@ msgstr "tác giả"
 msgid "slug"
 msgstr "slug"
 
-#: judge/models/interface.py:69 judge/models/problem.py:430
+#: judge/models/interface.py:69 judge/models/problem.py:449
 msgid "public visibility"
 msgstr "khả năng hiển thị công khai"
 
@@ -1380,7 +1380,7 @@ msgid ""
 "are supported."
 msgstr ""
 
-#: judge/models/problem.py:123 judge/models/problem.py:417
+#: judge/models/problem.py:123 judge/models/problem.py:436
 msgid "memory limit"
 msgstr ""
 
@@ -1453,67 +1453,85 @@ msgstr ""
 msgid "If private, only these organizations may see the problem."
 msgstr ""
 
-#: judge/models/problem.py:395 judge/models/problem.py:413
+#: judge/models/problem.py:414 judge/models/problem.py:432
 #: judge/models/runtime.py:111
 msgid "language"
 msgstr ""
 
-#: judge/models/problem.py:396
+#: judge/models/problem.py:415
 msgid "translated name"
 msgstr ""
 
-#: judge/models/problem.py:397
+#: judge/models/problem.py:416
 msgid "translated description"
 msgstr ""
 
-#: judge/models/problem.py:401
+#: judge/models/problem.py:420
 msgid "problem translation"
 msgstr ""
 
-#: judge/models/problem.py:402
+#: judge/models/problem.py:421
 msgid "problem translations"
 msgstr ""
 
-#: judge/models/problem.py:406
+#: judge/models/problem.py:425
 msgid "clarified problem"
 msgstr ""
 
-#: judge/models/problem.py:407
+#: judge/models/problem.py:426
 msgid "clarification body"
 msgstr ""
 
-#: judge/models/problem.py:408
+#: judge/models/problem.py:427
 msgid "clarification timestamp"
 msgstr ""
 
-#: judge/models/problem.py:423
+#: judge/models/problem.py:442
 msgid "language-specific resource limit"
 msgstr ""
 
-#: judge/models/problem.py:424
+#: judge/models/problem.py:443
 msgid "language-specific resource limits"
 msgstr ""
 
-#: judge/models/problem.py:428
+#: judge/models/problem.py:447
 msgid "associated problem"
 msgstr ""
 
-#: judge/models/problem.py:431
+#: judge/models/problem.py:450
 msgid "publish date"
 msgstr ""
 
-#: judge/models/problem.py:433
+#: judge/models/problem.py:452
 msgid "editorial content"
 msgstr "nội dung lời giải"
 
-#: judge/models/problem.py:449
+#: judge/models/problem.py:468
 msgid "solution"
 msgstr "lời giải"
 
-#: judge/models/problem.py:450
+#: judge/models/problem.py:469
 msgid "solutions"
 msgstr "lời giải"
 
+#: judge/models/problem.py:474
+#, fuzzy
+#| msgid "point value"
+msgid "proposed point value"
+msgstr "điểm"
+
+#: judge/models/problem.py:475
+msgid "The amount of points you think this problem deserves."
+msgstr ""
+
+#: judge/models/problem.py:485
+msgid "The time this vote was cast"
+msgstr ""
+
+#: judge/models/problem.py:491
+msgid "vote"
+msgstr ""
+
 #: judge/models/problem_data.py:26
 msgid "Standard"
 msgstr "Tiêu chuẩn"
@@ -1707,7 +1725,7 @@ msgid ""
 msgstr "Ảnh này sẽ thay thế logo mặc định khi ở trong tổ chức."
 
 #: judge/models/profile.py:76 judge/models/profile.py:93
-#: judge/models/profile.py:216
+#: judge/models/profile.py:221
 msgid "organization"
 msgstr ""
 
@@ -1756,78 +1774,88 @@ msgid "User will not be ranked."
 msgstr ""
 
 #: judge/models/profile.py:102
+#, fuzzy
+#| msgid "Banned from joining"
+msgid "banned from voting"
+msgstr "Bị cấm tham gia"
+
+#: judge/models/profile.py:103
+msgid "User will not be able to vote on problems' point values."
+msgstr ""
+
+#: judge/models/profile.py:107
 msgid "user script"
 msgstr ""
 
-#: judge/models/profile.py:103
+#: judge/models/profile.py:108
 msgid "User-defined JavaScript for site customization."
 msgstr ""
 
-#: judge/models/profile.py:104
+#: judge/models/profile.py:109
 msgid "current contest"
 msgstr "kỳ thi hiện tại"
 
-#: judge/models/profile.py:106
+#: judge/models/profile.py:111
 msgid "math engine"
 msgstr ""
 
-#: judge/models/profile.py:108
+#: judge/models/profile.py:113
 msgid "the rendering engine used to render math"
 msgstr ""
 
-#: judge/models/profile.py:109
+#: judge/models/profile.py:114
 msgid "2FA enabled"
 msgstr ""
 
-#: judge/models/profile.py:110
+#: judge/models/profile.py:115
 msgid "check to enable TOTP-based two factor authentication"
 msgstr "đánh dấu để sử dụng TOTP-based two factor authentication"
 
-#: judge/models/profile.py:111
+#: judge/models/profile.py:116
 msgid "TOTP key"
 msgstr "mã TOTP"
 
-#: judge/models/profile.py:112
+#: judge/models/profile.py:117
 msgid "32 character base32-encoded key for TOTP"
 msgstr ""
 
-#: judge/models/profile.py:114
+#: judge/models/profile.py:119
 msgid "TOTP key must be empty or base32"
 msgstr ""
 
-#: judge/models/profile.py:115
+#: judge/models/profile.py:120
 msgid "internal notes"
 msgstr "ghi chú nội bộ"
 
-#: judge/models/profile.py:116
+#: judge/models/profile.py:121
 msgid "Notes for administrators regarding this user."
 msgstr "Ghi chú riêng cho quản trị viên."
 
-#: judge/models/profile.py:210
+#: judge/models/profile.py:215
 msgid "user profile"
 msgstr "thông tin người dùng"
 
-#: judge/models/profile.py:211
+#: judge/models/profile.py:216
 msgid "user profiles"
 msgstr "thông tin người dùng"
 
-#: judge/models/profile.py:218
+#: judge/models/profile.py:223
 msgid "request time"
 msgstr "thời gian đăng ký"
 
-#: judge/models/profile.py:219
+#: judge/models/profile.py:224
 msgid "state"
 msgstr "trạng thái"
 
-#: judge/models/profile.py:224
+#: judge/models/profile.py:229
 msgid "reason"
 msgstr "lý do"
 
-#: judge/models/profile.py:227
+#: judge/models/profile.py:232
 msgid "organization join request"
 msgstr "đơn đăng ký tham gia"
 
-#: judge/models/profile.py:228
+#: judge/models/profile.py:233
 msgid "organization join requests"
 msgstr "đơn đăng ký tham gia"
 
@@ -2666,46 +2694,46 @@ msgstr "Hướng dẫn cho {0}"
 msgid "Editorial for <a href=\"{1}\">{0}</a>"
 msgstr "Hướng dẫn cho <a href=\"{1}\">{0}</a>"
 
-#: judge/views/problem.py:227
+#: judge/views/problem.py:284
 #, python-brace-format
 msgid "Disscuss {0}"
 msgstr ""
 
-#: judge/views/problem.py:230
+#: judge/views/problem.py:287
 #, python-brace-format
 msgid "Discuss <a href=\"{1}\">{0}</a>"
 msgstr "Thảo luận <a href=\"{1}\">{0}</a>"
 
-#: judge/views/problem.py:298 templates/contest/contest.html:79
+#: judge/views/problem.py:355 templates/contest/contest.html:79
 #: templates/user/user-about.html:28 templates/user/user-tabs.html:5
 #: templates/user/users-table.html:29
 msgid "Problems"
 msgstr "Bài tập"
 
-#: judge/views/problem.py:598
+#: judge/views/problem.py:655
 msgid "Banned from submitting"
 msgstr "Bị cấm nộp bài"
 
-#: judge/views/problem.py:599
+#: judge/views/problem.py:656
 msgid ""
 "You have been declared persona non grata for this problem. You are "
 "permanently barred from submitting this problem."
 msgstr "Bạn đã bị cấm nộp bài này."
 
-#: judge/views/problem.py:613
+#: judge/views/problem.py:670
 msgid "Too many submissions"
 msgstr "Quá nhiều lần nộp"
 
-#: judge/views/problem.py:614
+#: judge/views/problem.py:671
 msgid "You have exceeded the submission limit for this problem."
 msgstr "Bạn đã vượt quá số lần nộp cho bài này."
 
-#: judge/views/problem.py:674 judge/views/problem.py:677
+#: judge/views/problem.py:731 judge/views/problem.py:734
 #, python-format
 msgid "Submit to %(problem)s"
 msgstr "Nộp bài cho %(problem)s"
 
-#: judge/views/problem.py:692
+#: judge/views/problem.py:749
 msgid "Clone Problem"
 msgstr "Nhân bản bài tập"
 
@@ -2992,7 +3020,7 @@ msgid "Updated on site"
 msgstr "Được cập nhật trên web"
 
 #: judge/views/user.py:326 templates/admin/auth/user/change_form.html:14
-#: templates/admin/auth/user/change_form.html:17 templates/base.html:297
+#: templates/admin/auth/user/change_form.html:17 templates/base.html:299
 #: templates/user/user-tabs.html:10
 msgid "Edit profile"
 msgstr "Chỉnh sửa thông tin"
@@ -3177,15 +3205,22 @@ msgstr "Ngắt kết nối"
 msgid "Terminate"
 msgstr "Dừng"
 
-#: templates/admin/judge/problem/change_form.html:14
+#: templates/admin/judge/problem/change_form.html:15
 msgid "View Submissions"
 msgstr "Xem Bài Nộp"
 
-#: templates/admin/judge/problem/change_form.html:17
+#: templates/admin/judge/problem/change_form.html:18
 #: templates/user/user-base.html:112
 msgid "View submissions"
 msgstr "Xem bài nộp"
 
+#: templates/admin/judge/problem/change_form.html:19
+#: templates/admin/judge/problem/change_form.html:22
+#, fuzzy
+#| msgid "View on site"
+msgid "View votes"
+msgstr "Xem trên trang"
+
 #: templates/admin/judge/profile/change_form.html:14
 #: templates/admin/judge/profile/change_form.html:17
 msgid "Edit user"
@@ -3197,20 +3232,20 @@ msgstr "Chỉnh sửa thông tin"
 msgid "Rejudge"
 msgstr "Chấm lại"
 
-#: templates/base.html:266 templates/chat/chat.html:566
+#: templates/base.html:268 templates/chat/chat.html:573
 msgid "Chat"
 msgstr "Chat"
 
-#: templates/base.html:272
+#: templates/base.html:274
 msgid "Notification"
 msgstr "Thông báo"
 
-#: templates/base.html:289
+#: templates/base.html:291
 #, python-format
 msgid "Hello, <b>%(username)s</b>."
 msgstr "Xin chào, <b>%(username)s</b>."
 
-#: templates/base.html:295 templates/chat/chat.html:20
+#: templates/base.html:297 templates/chat/chat.html:20
 #: templates/comments/list.html:89 templates/contest/contest-list-tabs.html:24
 #: templates/contest/ranking-table.html:53
 #: templates/problem/problem-list-tabs.html:6
@@ -3219,36 +3254,36 @@ msgstr "Xin chào, <b>%(username)s</b>."
 msgid "Admin"
 msgstr ""
 
-#: templates/base.html:304
+#: templates/base.html:306
 msgid "Log out"
 msgstr "Đăng xuất"
 
-#: templates/base.html:313
+#: templates/base.html:315
 #: templates/registration/password_reset_complete.html:4
 msgid "Log in"
 msgstr "Đăng nhập"
 
-#: templates/base.html:314 templates/registration/registration_form.html:177
+#: templates/base.html:316 templates/registration/registration_form.html:177
 msgid "or"
 msgstr "hoặc"
 
-#: templates/base.html:315
+#: templates/base.html:317
 msgid "Sign up"
 msgstr "Đăng ký"
 
-#: templates/base.html:331
+#: templates/base.html:333
 msgid "spectating"
 msgstr "đang theo dõi"
 
-#: templates/base.html:343
+#: templates/base.html:345
 msgid "Compete"
 msgstr "Thi"
 
-#: templates/base.html:345
+#: templates/base.html:347
 msgid "General"
 msgstr "Chung"
 
-#: templates/base.html:352
+#: templates/base.html:354
 msgid "This site works best with JavaScript enabled."
 msgstr ""
 
@@ -3292,7 +3327,7 @@ msgid "News"
 msgstr "Tin tức"
 
 #: templates/blog/list.html:115 templates/problem/list.html:347
-#: templates/problem/problem.html:364
+#: templates/problem/problem.html:370
 msgid "Clarifications"
 msgstr "Thông báo"
 
@@ -3301,7 +3336,7 @@ msgid "Add"
 msgstr "Thêm mới"
 
 #: templates/blog/list.html:140 templates/problem/list.html:369
-#: templates/problem/problem.html:375
+#: templates/problem/problem.html:381
 msgid "No clarifications have been made at this time."
 msgstr "Không có thông báo nào."
 
@@ -3349,24 +3384,24 @@ msgstr "Thành viên khác"
 msgid "New message(s)"
 msgstr "Tin nhắn mới"
 
-#: templates/chat/chat.html:507 templates/chat/chat.html:588
+#: templates/chat/chat.html:514 templates/chat/chat.html:595
 #: templates/user/base-users.html:14 templates/user/base-users.html:80
 msgid "Search by handle..."
 msgstr "Tìm kiếm theo tên..."
 
-#: templates/chat/chat.html:568 templates/chat/chat.html:575
+#: templates/chat/chat.html:575 templates/chat/chat.html:582
 msgid "Online Users"
 msgstr "Trực tuyến"
 
-#: templates/chat/chat.html:576
+#: templates/chat/chat.html:583
 msgid "Refresh"
 msgstr "Làm mới"
 
-#: templates/chat/chat.html:609
+#: templates/chat/chat.html:616
 msgid "Emoji"
 msgstr ""
 
-#: templates/chat/chat.html:610
+#: templates/chat/chat.html:617
 msgid "Enter your message"
 msgstr "Nhập tin nhắn"
 
@@ -3563,8 +3598,8 @@ msgstr "Lịch"
 msgid "Info"
 msgstr "Thông tin"
 
-#: templates/contest/contest-tabs.html:6 templates/stats/base.html:9
+#: templates/contest/contest-tabs.html:6 templates/problem/voting-stats.html:26
-#: templates/submission/list.html:339
+#: templates/stats/base.html:9 templates/submission/list.html:339
 msgid "Statistics"
 msgstr "Thống kê"
 
@@ -3845,27 +3880,27 @@ msgstr "Bạn có chắc muốn hủy kết quả này?"
 msgid "Are you sure you want to un-disqualify this participation?"
 msgstr "Bạn có chắc muốn khôi phục kết quả này?"
 
-#: templates/contest/ranking.html:415
+#: templates/contest/ranking.html:446
 msgid "View user participation"
 msgstr "Xem các lần tham gia"
 
-#: templates/contest/ranking.html:419
+#: templates/contest/ranking.html:450
 msgid "Show organizations"
 msgstr "Hiển thị tổ chức"
 
-#: templates/contest/ranking.html:423
+#: templates/contest/ranking.html:454
 msgid "Show full name"
 msgstr "Hiển thị họ tên"
 
-#: templates/contest/ranking.html:426
+#: templates/contest/ranking.html:457
 msgid "Show friends only"
 msgstr "Chỉ hiển thị bạn bè"
 
-#: templates/contest/ranking.html:429
+#: templates/contest/ranking.html:460
 msgid "Total score only"
 msgstr "Chỉ hiển thị tổng điểm"
 
-#: templates/contest/ranking.html:431
+#: templates/contest/ranking.html:462
 msgid "Show virtual participation"
 msgstr "Hiển thị tham gia ảo"
 
@@ -4415,16 +4450,16 @@ msgstr[0] "Máy chấm:"
 msgid "none available"
 msgstr "không có sẵn"
 
-#: templates/problem/problem.html:328
+#: templates/problem/problem.html:331
 #, python-format
 msgid "This problem has %(length)s clarification(s)"
 msgstr "Bài này có %(length)s thông báo"
 
-#: templates/problem/problem.html:353
+#: templates/problem/problem.html:359
 msgid "Request clarification"
 msgstr "Yêu cầu làm rõ đề"
 
-#: templates/problem/problem.html:355
+#: templates/problem/problem.html:361
 msgid "Report an issue"
 msgstr "Báo cáo một vấn đề"
 
@@ -4522,6 +4557,50 @@ msgstr "Không có máy chấm có thể chấm bài này."
 msgid "Submit!"
 msgstr "Nộp bài!"
 
+#: templates/problem/voting-controls.html:53
+msgid "Edit difficulty"
+msgstr "Thay đổi độ khó"
+
+#: templates/problem/voting-controls.html:61
+msgid "Vote difficulty"
+msgstr "Bình chọn độ khó"
+
+#: templates/problem/voting-form.html:21
+msgid "How difficult is this problem?"
+msgstr "Bạn thấy độ khó bài này thế nào?"
+
+#: templates/problem/voting-form.html:35
+msgid "This helps us improve the site"
+msgstr "Bình chọn giúp admin cải thiện bài tập."
+
+#: templates/problem/voting-form.html:38
+msgid "Easy"
+msgstr "Dễ"
+
+#: templates/problem/voting-form.html:39
+msgid "Hard"
+msgstr "Khó"
+
+#: templates/problem/voting-stats.html:29
+msgid "Voting Statistics"
+msgstr "Thống kê"
+
+#: templates/problem/voting-stats.html:32
+msgid "No Votes Available!"
+msgstr "Không có bình chọn nào!"
+
+#: templates/problem/voting-stats.html:35
+msgid "Median:"
+msgstr "Trung vị:"
+
+#: templates/problem/voting-stats.html:37
+msgid "Mean:"
+msgstr "Trung bình:"
+
+#: templates/problem/voting-stats.html:39 templates/submission/list.html:345
+msgid "Total:"
+msgstr "Tổng:"
+
 #: templates/registration/activate.html:3
 #, python-format
 msgid "%(key)s is an invalid activation key."
@@ -4779,10 +4858,6 @@ msgstr "Lọc theo kết quả..."
 msgid "Filter by language..."
 msgstr "Lọc theo ngôn ngữ..."
 
-#: templates/submission/list.html:345
-msgid "Total:"
-msgstr "Tổng:"
-
 #: templates/submission/list.html:355
 msgid "You were disconnected. Refresh to show latest updates."
 msgstr "Bạn bị ngắt kết nối. Hãy làm mới để xem cập nhật mới nhất."

templates/admin/judge/problem/change_form.html

@@ -5,6 +5,7 @@
     <script>
         django.jQuery(function ($) {
             $('.submissions-link').appendTo('div#bottombar').show();
+            $('.votes-link').appendTo('div#bottombar').show();
         });
     </script>
 {% endblock extrahead %}
@@ -15,6 +16,10 @@
            href="{% url 'admin:judge_submission_changelist' %}?problem__code={{ original.code }}">
             <i class="fa fa-lg fa-search-plus"></i>
             <span class="text">{% trans "View submissions" %}</span>
+        <a style="display: none" title="{{ _('View votes') }}" class="button votes-link"
+           href="{% url 'admin:judge_problempointsvote_changelist' %}?problem__code={{ original.code }}">
+           <i class="fa fa-lg fa-envelope"></i>
+           <span class="text">{{ _('View votes') }}</span>
         </a>
     {% endif %}
 {% endblock %}

templates/problem/problem.html

@@ -164,7 +164,7 @@
     {% endif %}
     <div><a href="{{ url('chronological_submissions', problem.code) }}">{{ _('All submissions') }}</a></div>
     <div><a href="{{ url('ranked_submissions', problem.code) }}">{{ _('Best submissions') }}</a></div>
-    
+
     {% if not contest_problem or not contest_problem.contest.use_clarifications %}
         <hr>
         <div><a href="{{ url('problem_comments', problem.code) }}">{{ _('Discuss') }}</a></div>
@@ -321,6 +321,9 @@
 {% endblock %}
 
 {% block description %}
+    {% if can_vote and not vote %}
+        {% include 'problem/voting-form.html' %}
+    {% endif %}
     {% if contest_problem and contest_problem.contest.use_clarifications and has_clarifications %}
         <div id="clarification_header_container">
             <i class="fa fa-question-circle"></i>
@@ -346,6 +349,9 @@
 {% endblock %}
 
 {% block post_description_end %}
+    {% if can_vote %}
+        {% include 'problem/voting-controls.html' %}
+    {% endif %}
     {% if request.user.is_authenticated and not request.profile.mute %}
         <a href="{{ url('new_problem_ticket', problem.code) }}" class="clarify">
             <i class="fa fa-flag" style="margin-right:0.5em"></i>

templates/problem/voting-controls.html

@@ -0,0 +1,73 @@
+<style>
+    .featherlight .featherlight-inner{
+      display: block !important;
+    }
+    .featherlight-content {
+      overflow: inherit !important;  
+    }
+
+    .stars-container {
+        display: inline-block;
+        vertical-align: top;
+    }
+    .stars-container .star {
+        display: inline-block;
+        padding: 2px;
+        color: orange;
+        cursor: pointer;
+        font-size: 30px;
+    }
+    .stars-container .star:before {
+        content:"\f006";
+    }
+    .filled-star:before, .star:hover:before {
+        content:"\f005" !important;
+    }
+</style>
+
+{% if can_vote %}
+    <div class="vote-form" id="id_vote_form_box" style="display: none">
+        {% include 'problem/voting-form.html' %}        
+    </div>
+    <span>
+        <a href="#" class="form-button" id="id_vote_button" data-featherlight="#id_vote_form_box"></a>
+        {% if request.user.is_superuser %}
+            - {% include 'problem/voting-stats.html' %}
+        {% endif %}
+    </span>
+
+    <script src="{{ static('libs/featherlight/featherlight.min.js') }}" type="text/javascript"></script>
+    <script>
+        let voted_points = null;
+        {% if vote is not none %}
+            let has_voted = true;
+            voted_points = {{ vote.points }};
+        {% else %}
+            let has_voted = false;
+        {% endif %}
+
+        function voteUpdate(){
+            $('#id_has_voted_prompt').show();
+            $('#id_current_vote_value').prop('innerText', voted_points);
+            $('#id_has_not_voted_prompt').hide();
+            $('#id_vote_button').prop('innerText', `{{ _('Edit difficulty') }} (` + voted_points + ')');
+            $('#id_points_error_box').hide();
+            has_voted = true;
+        }
+
+        function deleteVoteUpdate(){
+            $('#id_has_voted_prompt').hide();
+            $('#id_has_not_voted_prompt').show();
+            $('#id_vote_button').prop('innerText', `{{ _('Vote difficulty') }}`);
+            $('#id_points_error_box').hide();
+            has_voted = false;
+        }
+
+        if (has_voted) voteUpdate();
+        else deleteVoteUpdate();
+
+        $('#id_vote_form').on('submit', function (e) {
+            e.preventDefault();
+        });
+    </script>
+{% endif %}

templates/problem/voting-form.html

@@ -0,0 +1,93 @@
+<style>
+    .vote_form {
+        border: 3px solid blue;
+        border-radius: 5px;
+        width: fit-content;
+        margin-left: auto;
+        margin-right: auto;
+        padding: 0.2em 1em;
+        background: #ebf0ff;
+        color: #2e69ff;
+    }
+</style>
+<form id="id_vote_form" class="vote_form">
+    {% csrf_token %}
+    <input id="id_points" class="vote-form-value" type="hidden" step="1"
+           min="{{ min_possible_vote }}" max="{{ max_possible_vote }}" name="points">
+    <table>
+        <tbody>
+            <tr>
+                <td style="padding-top: 1em; padding-right: 3em">
+                    <span><b>{{_('How difficult is this problem?')}}</b></span>
+                </td>
+                <td>
+                    <div class="vote-rating">
+                        <span class="stars-container">
+                            {% for i in range(1, (max_possible_vote - min_possible_vote) // 100 + 2) %}
+                                <span id="star{{i}}" star-score="{{i * 100}}" class="fa star"></span>
+                            {% endfor %}
+                        </span>
+                    </div>
+                </td>
+            </tr>
+            <tr>
+                <td>
+                    <span>{{_('This helps us improve the site')}}</span>
+                </td>
+                <td>
+                    <span style="padding-left: 0.2em"><b>{{_('Easy')}}</b></span>
+                    <span style="float: right; padding-right: 0.2em"><b>{{_('Hard')}}</b></span>
+                </td>
+            </tr>
+        </tbody>
+    </table>
+    <div id="id_points_error_box">
+        <span id="id_points_error" class="voting-form-error"></span>
+    </div>
+    <div>
+        <input type="hidden" id="id_vote_form_submit_button">
+    </div>
+</form>
+<script>
+    $('.star').hover(
+        (e) => $(e.target).prevAll().addClass('filled-star'),
+        (e) => $(e.target).prevAll().removeClass('filled-star')
+    );
+    $('.star').on('click', function() {
+        $("#id_points").val($(this).attr('star-score'));
+        $('#id_vote_form_submit_button').click();
+        $('#id_vote_form').fadeOut(500);
+    })
+    $('#id_vote_form_submit_button').on('click', function (e) {
+        e.preventDefault();
+        $.ajax({
+            url: '{{ url('vote', object.code) }}',
+            type: 'POST',
+            data: $('#id_vote_form').serialize(),
+            success: function (data) {
+                {% if request.user.is_superuser %}
+                    updateUserVote(voted_points, data.points);
+                {% endif %}
+                voted_points = data.points;
+                voteUpdate();
+                // Forms are auto disabled to prevent resubmission, but we need to allow resubmission here.
+                $('#id_vote_form_submit_button').removeAttr('disabled');
+                var current = $.featherlight.current();
+                current.close();
+            },
+            error: function (data) {
+                let errors = data.responseJSON;
+                if(errors === undefined) {
+                    alert('Unable to delete vote: ' + data.responsetext);
+                }
+
+                if('points' in errors){
+                    $('#id_points_error_box').show();
+                    $('#id_points_error').prop('textContent', errors.points[0]);
+                } else {
+                    $('#id_points_error_box').hide();
+                }
+            }
+        });
+    });
+</script>

templates/problem/voting-stats.html

@@ -0,0 +1,146 @@
+<style>
+    .vote-stats-background {
+        background-color: rgb(255,255,255);
+        padding: 20px;
+        border-radius: 25px;
+        justify-content: center;
+        align-items: center;
+        margin: auto;
+        text-align: center;
+    }
+
+    .canvas {
+        border: 1px;
+        border: solid;
+        border: #000000;
+    }
+
+    .vote-stats-value {
+        margin-right: 1em;
+    }
+
+    .vote-stats-info {
+        font-weight: 500;
+    }
+</style>
+<a href="#" class="form-button" id="id_vote_stats_button">{{ _('Statistics') }}</a>
+<div class="vote-stats-background" id="id_vote_stats" style="display: none;">
+    <script src={{ static('libs/chart.js/Chart.js') }}></script>
+    <span class="vote-stats-info">{{ _('Voting Statistics') }}</span>
+    <br/>
+    <canvas class="canvas" id="id_vote_chart"></canvas>
+    <span id="id_no_votes_error" class="vote-stats-info no_votes_error">{{ _('No Votes Available!') }}</span>
+    <br/>
+    <div id="id_has_votes_footer" class="has_votes_footer">
+        <span class="vote-stats-info">{{ _('Median:') }}</span>
+        <span class="vote-stats-value median_vote" id="id_median_vote"></span>
+        <span class="vote-stats-info">{{ _('Mean:') }}</span>
+        <span class="vote-stats-value mean_vote" id="id_mean_vote"></span>
+        <span class="vote-stats-info">{{ _('Total:') }}</span>
+        <span class="vote-stats-value total_vote" id="id_num_of_votes"></span>
+    </div>
+</div>
+
+<script>
+    let voteChart = null;
+    let data = {{ all_votes }};
+
+    function reload_vote_graph() {
+        if (voteChart !== null) voteChart.destroy();
+
+        if (data.length === 0) {
+            $('.canvas').hide();
+            $('.has_votes_footer').hide();
+            $('.no_votes_error').show();
+        } else {
+            $('.canvas').show();
+            $('.has_votes_footer').show();
+            $('.no_votes_error').hide();
+
+            data.sort(function(a, b){return a - b});
+            // Give the graph some padding on both sides.
+            let min_points = {{ min_possible_vote }};
+            let max_points = {{ max_possible_vote }};
+
+            let xlabels = [];
+            let voteFreq = [];
+            for (let i = min_points; i <= max_points; i += 100) {
+                xlabels.push(i);
+                voteFreq.push(0);
+            }
+
+            let max_number_of_votes = 0;
+            let total_votes = 0;
+            let mean = 0;
+
+            for (let i = 0; i < data.length; i++) {
+                // Assume the data is valid.
+                voteFreq[(data[i] - min_points) / 100]++;
+                max_number_of_votes = Math.max(max_number_of_votes, voteFreq[(data[i] - min_points) / 100]);
+                mean += data[i];
+                total_votes++;
+            }
+            mean = mean / total_votes;
+            let half = Math.floor(total_votes / 2);
+            let median = data[half];
+            if (total_votes % 2 === 0) {
+                median = (median + data[half - 1]) / 2;
+            }
+
+            $('.mean_vote').prop('innerText', mean.toFixed(2));
+            $('.median_vote').prop('innerText', median.toFixed(2));
+            $('.total_vote').prop('innerText', total_votes);
+
+            const voteData = {
+                labels: xlabels,
+                datasets: [{
+                    data: voteFreq,
+                    backgroundColor: 'pink',
+                }]
+            };
+
+            const voteDataConfig = {
+                type: 'bar',
+                data: voteData,
+                options: {
+                    legend: {
+                        display: false
+                    },
+                    responsive: true,
+                    scales: {
+                        yAxes: [{
+                            ticks: {
+                                precision: 0,
+                                suggestedMax: Math.ceil(max_number_of_votes * 1.2),
+                                beginAtZero: true,
+                            }
+                        }],
+                        xAxes: [{
+                            ticks: {
+                                beginAtZero: false,
+                            }
+                        }]
+                    }
+                }
+            };
+            voteChart = new Chart($('.featherlight-inner .canvas'), voteDataConfig);
+        }
+    }
+
+    function updateUserVote(prev_voted_points, voted_points) {
+        let index = data.indexOf(prev_voted_points);
+        if (index > -1) {
+            data.splice(index, 1);
+        }
+        data.push(voted_points);
+    }
+
+    function deleteUserVote(prev_voted_points) {
+        data.splice(data.indexOf(prev_voted_points), 1);
+    }
+    $(function() {
+        $('#id_vote_stats_button').featherlight('#id_vote_stats', {
+            afterOpen: reload_vote_graph,
+        })
+    });
+</script>