# -*- coding: utf-8 -*- from datetime import datetime from decimal import Decimal from django.db import models from django.db.models import Q from django.db.models.signals import post_save from django.contrib.auth.models import User from markitup.fields import MarkupField from symposion.proposals.models import ProposalBase from symposion.schedule.models import Presentation class ProposalScoreExpression(object): def as_sql(self, qn, connection=None): sql = "((3 * plus_one + plus_zero) - (minus_zero + 3 * minus_one))" return sql, [] def prepare_database_save(self, unused): return self class Votes(object): PLUS_ONE = "+1" PLUS_ZERO = "+0" MINUS_ZERO = u"−0" MINUS_ONE = u"−1" CHOICES = [ (PLUS_ONE, u"+1 — Good proposal and I will argue for it to be accepted."), (PLUS_ZERO, u"+0 — OK proposal, but I will not argue for it to be accepted."), (MINUS_ZERO, u"−0 — Weak proposal, but I will not argue strongly against acceptance."), (MINUS_ONE, u"−1 — Serious issues and I will argue to reject this proposal."), ] VOTES = Votes() class ReviewAssignment(models.Model): AUTO_ASSIGNED_INITIAL = 0 OPT_IN = 1 AUTO_ASSIGNED_LATER = 2 NUM_REVIEWERS = 3 ORIGIN_CHOICES = [ (AUTO_ASSIGNED_INITIAL, "auto-assigned, initial"), (OPT_IN, "opted-in"), (AUTO_ASSIGNED_LATER, "auto-assigned, later"), ] proposal = models.ForeignKey(ProposalBase) user = models.ForeignKey(User) origin = models.IntegerField(choices=ORIGIN_CHOICES) assigned_at = models.DateTimeField(default=datetime.now) opted_out = models.BooleanField(default=False) @classmethod def create_assignments(cls, proposal, origin=AUTO_ASSIGNED_INITIAL): speakers = [proposal.speaker] + list(proposal.additional_speakers.all()) reviewers = User.objects.exclude( pk__in=[ speaker.user_id for speaker in speakers if speaker.user_id is not None ] + [ assignment.user_id for assignment in ReviewAssignment.objects.filter( proposal_id=proposal.id)] ).filter( groups__name="reviewers", ).filter( Q(reviewassignment__opted_out=False) | Q(reviewassignment=None) ).annotate( num_assignments=models.Count("reviewassignment") ).order_by( "num_assignments", "?", ) num_assigned_reviewers = ReviewAssignment.objects.filter( proposal_id=proposal.id, opted_out=0).count() for reviewer in reviewers[:max(0, cls.NUM_REVIEWERS - num_assigned_reviewers)]: cls._default_manager.create( proposal=proposal, user=reviewer, origin=origin, ) class ProposalMessage(models.Model): proposal = models.ForeignKey(ProposalBase, related_name="messages") user = models.ForeignKey(User) message = MarkupField() submitted_at = models.DateTimeField(default=datetime.now, editable=False) class Meta: ordering = ["submitted_at"] class Review(models.Model): VOTES = VOTES proposal = models.ForeignKey(ProposalBase, related_name="reviews") user = models.ForeignKey(User) # No way to encode "-0" vs. "+0" into an IntegerField, and I don't feel # like some complicated encoding system. vote = models.CharField(max_length=2, blank=True, choices=VOTES.CHOICES) comment = MarkupField() submitted_at = models.DateTimeField(default=datetime.now, editable=False) def save(self, **kwargs): if self.vote: vote, created = LatestVote.objects.get_or_create( proposal=self.proposal, user=self.user, defaults=dict( vote=self.vote, submitted_at=self.submitted_at, ) ) if not created: LatestVote.objects.filter(pk=vote.pk).update(vote=self.vote) self.proposal.result.update_vote(self.vote, previous=vote.vote) else: self.proposal.result.update_vote(self.vote) super(Review, self).save(**kwargs) def delete(self): model = self.__class__ user_reviews = model._default_manager.filter( proposal=self.proposal, user=self.user, ) try: # find the latest review latest = user_reviews.exclude(pk=self.pk).order_by("-submitted_at")[0] except IndexError: # did not find a latest which means this must be the only one. # treat it as a last, but delete the latest vote. self.proposal.result.update_vote(self.vote, removal=True) lv = LatestVote.objects.filter(proposal=self.proposal, user=self.user) lv.delete() else: # handle that we've found a latest vote # check if self is the lastest vote if self == latest: # self is the latest review; revert the latest vote to the # previous vote previous = user_reviews.filter(submitted_at__lt=self.submitted_at)\ .order_by("-submitted_at")[0] self.proposal.result.update_vote(self.vote, previous=previous.vote, removal=True) lv = LatestVote.objects.filter(proposal=self.proposal, user=self.user) lv.update( vote=previous.vote, submitted_at=previous.submitted_at, ) else: # self is not the latest review so we just need to decrement # the comment count self.proposal.result.comment_count = models.F("comment_count") - 1 self.proposal.result.save() # in all cases we need to delete the review; let's do it! super(Review, self).delete() def css_class(self): return { self.VOTES.PLUS_ONE: "plus-one", self.VOTES.PLUS_ZERO: "plus-zero", self.VOTES.MINUS_ZERO: "minus-zero", self.VOTES.MINUS_ONE: "minus-one", }[self.vote] @property def section(self): return self.proposal.kind.section.slug class LatestVote(models.Model): VOTES = VOTES proposal = models.ForeignKey(ProposalBase, related_name="votes") user = models.ForeignKey(User) # No way to encode "-0" vs. "+0" into an IntegerField, and I don't feel # like some complicated encoding system. vote = models.CharField(max_length=2, choices=VOTES.CHOICES) submitted_at = models.DateTimeField(default=datetime.now, editable=False) class Meta: unique_together = [("proposal", "user")] def css_class(self): return { self.VOTES.PLUS_ONE: "plus-one", self.VOTES.PLUS_ZERO: "plus-zero", self.VOTES.MINUS_ZERO: "minus-zero", self.VOTES.MINUS_ONE: "minus-one", }[self.vote] class ProposalResult(models.Model): proposal = models.OneToOneField(ProposalBase, related_name="result") score = models.DecimalField(max_digits=5, decimal_places=2, default=Decimal("0.00")) comment_count = models.PositiveIntegerField(default=0) vote_count = models.PositiveIntegerField(default=0) plus_one = models.PositiveIntegerField(default=0) plus_zero = models.PositiveIntegerField(default=0) minus_zero = models.PositiveIntegerField(default=0) minus_one = models.PositiveIntegerField(default=0) accepted = models.NullBooleanField(choices=[ (True, "accepted"), (False, "rejected"), (None, "undecided"), ], default=None) status = models.CharField(max_length=20, choices=[ ("accepted", "accepted"), ("rejected", "rejected"), ("undecided", "undecided"), ("standby", "standby"), ], default="undecided") @classmethod def full_calculate(cls): for proposal in ProposalBase.objects.all(): result, created = cls._default_manager.get_or_create(proposal=proposal) result.comment_count = Review.objects.filter(proposal=proposal).count() result.vote_count = LatestVote.objects.filter(proposal=proposal).count() result.plus_one = LatestVote.objects.filter( proposal=proposal, vote=VOTES.PLUS_ONE ).count() result.plus_zero = LatestVote.objects.filter( proposal=proposal, vote=VOTES.PLUS_ZERO ).count() result.minus_zero = LatestVote.objects.filter( proposal=proposal, vote=VOTES.MINUS_ZERO ).count() result.minus_one = LatestVote.objects.filter( proposal=proposal, vote=VOTES.MINUS_ONE ).count() result.save() cls._default_manager.filter(pk=result.pk).update(score=ProposalScoreExpression()) def update_vote(self, vote, previous=None, removal=False): mapping = { VOTES.PLUS_ONE: "plus_one", VOTES.PLUS_ZERO: "plus_zero", VOTES.MINUS_ZERO: "minus_zero", VOTES.MINUS_ONE: "minus_one", } if previous: if previous == vote: return if removal: setattr(self, mapping[previous], models.F(mapping[previous]) + 1) else: setattr(self, mapping[previous], models.F(mapping[previous]) - 1) else: if removal: self.vote_count = models.F("vote_count") - 1 else: self.vote_count = models.F("vote_count") + 1 if removal: setattr(self, mapping[vote], models.F(mapping[vote]) - 1) self.comment_count = models.F("comment_count") - 1 else: setattr(self, mapping[vote], models.F(mapping[vote]) + 1) self.comment_count = models.F("comment_count") + 1 self.save() model = self.__class__ model._default_manager.filter(pk=self.pk).update(score=ProposalScoreExpression()) class Comment(models.Model): proposal = models.ForeignKey(ProposalBase, related_name="comments") commenter = models.ForeignKey(User) text = MarkupField() # Or perhaps more accurately, can the user see this comment. public = models.BooleanField(choices=[(True, "public"), (False, "private")], default=False) commented_at = models.DateTimeField(default=datetime.now) class NotificationTemplate(models.Model): label = models.CharField(max_length=100) from_address = models.EmailField() subject = models.CharField(max_length=100) body = models.TextField() class ResultNotification(models.Model): proposal = models.ForeignKey(ProposalBase, related_name="notifications") template = models.ForeignKey(NotificationTemplate, null=True, blank=True, on_delete=models.SET_NULL) timestamp = models.DateTimeField(default=datetime.now) to_address = models.EmailField() from_address = models.EmailField() subject = models.CharField(max_length=100) body = models.TextField() @property def email_args(self): return (self.subject, self.body, self.from_address, [self.to_address]) def promote_proposal(proposal): if hasattr(proposal, "presentation") and proposal.presentation: # already promoted presentation = proposal.presentation else: presentation = Presentation( title=proposal.title, description=proposal.description, abstract=proposal.abstract, speaker=proposal.speaker, section=proposal.section, proposal_base=proposal, ) presentation.save() for speaker in proposal.additional_speakers.all(): presentation.additional_speakers.add(speaker) presentation.save() return presentation def unpromote_proposal(proposal): if hasattr(proposal, "presentation") and proposal.presentation: proposal.presentation.delete() def accepted_proposal(sender, instance=None, **kwargs): if instance is None: return if instance.status == "accepted": promote_proposal(instance.proposal) else: unpromote_proposal(instance.proposal) post_save.connect(accepted_proposal, sender=ProposalResult)