# -*- coding: utf-8 -*- from __future__ import unicode_literals 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 django.utils.translation import ugettext_lazy as _ 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 = "−0" MINUS_ONE = "−1" CHOICES = [ (PLUS_ONE, _("+1 — Good proposal and I will argue for it to be accepted.")), (PLUS_ZERO, _("+0 — OK proposal, but I will not argue for it to be accepted.")), (MINUS_ZERO, _("−0 — Weak proposal, but I will not argue strongly against acceptance.")), (MINUS_ONE, _("−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, verbose_name=_("Proposal")) user = models.ForeignKey(User, verbose_name=_("User")) origin = models.IntegerField(choices=ORIGIN_CHOICES, verbose_name=_("Origin")) assigned_at = models.DateTimeField(default=datetime.now, verbose_name=_("Assigned at")) opted_out = models.BooleanField(default=False, verbose_name=_("Opted out")) @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", verbose_name=_("Proposal")) user = models.ForeignKey(User, verbose_name=_("User")) message = MarkupField(verbose_name=_("Message")) submitted_at = models.DateTimeField(default=datetime.now, editable=False, verbose_name=_("Submitted at")) class Meta: ordering = ["submitted_at"] verbose_name = _("proposal message") verbose_name_plural = _("proposal messages") class Review(models.Model): VOTES = VOTES proposal = models.ForeignKey(ProposalBase, related_name="reviews", verbose_name=_("Proposal")) user = models.ForeignKey(User, verbose_name=_("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, verbose_name=_("Vote")) comment = MarkupField(verbose_name=_("Comment")) submitted_at = models.DateTimeField(default=datetime.now, editable=False, verbose_name=_("Submitted at")) 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 Meta: verbose_name = _("review") verbose_name_plural = _("reviews") class LatestVote(models.Model): VOTES = VOTES proposal = models.ForeignKey(ProposalBase, related_name="votes", verbose_name=_("Proposal")) user = models.ForeignKey(User, verbose_name=_("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, verbose_name=_("Vote")) submitted_at = models.DateTimeField(default=datetime.now, editable=False, verbose_name=_("Submitted at")) class Meta: unique_together = [("proposal", "user")] verbose_name = _("latest vote") verbose_name_plural = _("latest votes") 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", verbose_name=_("Proposal")) score = models.DecimalField(max_digits=5, decimal_places=2, default=Decimal("0.00"), verbose_name=_("Score")) comment_count = models.PositiveIntegerField(default=0, verbose_name=_("Comment count")) vote_count = models.PositiveIntegerField(default=0, verbose_name=_("Vote count")) plus_one = models.PositiveIntegerField(default=0, verbose_name=_("Plus one")) plus_zero = models.PositiveIntegerField(default=0, verbose_name=_("Plus zero")) minus_zero = models.PositiveIntegerField(default=0, verbose_name=_("Minus zero")) minus_one = models.PositiveIntegerField(default=0, verbose_name=_("Minus one")) accepted = models.NullBooleanField(choices=[ (True, "accepted"), (False, "rejected"), (None, "undecided"), ], default=None, verbose_name=_("Accepted")) status = models.CharField(max_length=20, choices=[ ("accepted", _("accepted")), ("rejected", _("rejected")), ("undecided", _("undecided")), ("standby", _("standby")), ], default="undecided", verbose_name=_("Status")) @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 Meta: verbose_name = _("proposal_result") verbose_name_plural = _("proposal_results") class Comment(models.Model): proposal = models.ForeignKey(ProposalBase, related_name="comments", verbose_name=_("Proposal")) commenter = models.ForeignKey(User, verbose_name=_("Commenter")) text = MarkupField(verbose_name=_("Text")) # Or perhaps more accurately, can the user see this comment. public = models.BooleanField(choices=[(True, _("public")), (False, _("private"))], default=False, verbose_name=_("Public")) commented_at = models.DateTimeField(default=datetime.now, verbose_name=_("Commented at")) class Meta: verbose_name = _("comment") verbose_name_plural = _("comments") class NotificationTemplate(models.Model): label = models.CharField(max_length=100, verbose_name=_("Label")) from_address = models.EmailField(verbose_name=_("From address")) subject = models.CharField(max_length=100, verbose_name=_("Subject")) body = models.TextField(verbose_name=_("Body")) class Meta: verbose_name = _("notification template") verbose_name_plural = _("notification templates") class ResultNotification(models.Model): proposal = models.ForeignKey(ProposalBase, related_name="notifications", verbose_name=_("Proposal")) template = models.ForeignKey(NotificationTemplate, null=True, blank=True, on_delete=models.SET_NULL, verbose_name=_("Template")) timestamp = models.DateTimeField(default=datetime.now, verbose_name=_("Timestamp")) to_address = models.EmailField(verbose_name=_("To address")) from_address = models.EmailField(verbose_name=_("From address")) subject = models.CharField(max_length=100, verbose_name=_("Subject")) body = models.TextField(verbose_name=_("Body")) def recipients(self): for speaker in self.proposal.speakers(): yield speaker.email @property def email_args(self): return (self.subject, self.body, self.from_address, self.recipients()) 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)