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