import datetime from django.core.exceptions import ValidationError from django.core.urlresolvers import reverse from django.db import models from django.db.models.signals import post_init, post_save from django.utils.translation import ugettext_lazy as _ from django.contrib.auth.models import User from symposion.conference.models import Conference from symposion.sponsorship.managers import SponsorManager class SponsorLevel(models.Model): conference = models.ForeignKey(Conference, verbose_name=_("conference")) name = models.CharField(_("name"), max_length=100) order = models.IntegerField(_("order"), default=0) cost = models.PositiveIntegerField(_("cost")) description = models.TextField(_("description"), blank=True, help_text=_("This is private.")) class Meta: ordering = ["conference", "order"] verbose_name = _("sponsor level") verbose_name_plural = _("sponsor levels") def __unicode__(self): return self.name def sponsors(self): return self.sponsor_set.filter(active=True).order_by("added") class Sponsor(models.Model): applicant = models.ForeignKey(User, related_name="sponsorships", verbose_name=_("applicant"), null=True) name = models.CharField(_("Sponsor Name"), max_length=100) external_url = models.URLField(_("external URL")) annotation = models.TextField(_("annotation"), blank=True) contact_name = models.CharField(_("Contact Name"), max_length=100) contact_email = models.EmailField(_(u"Contact Email")) level = models.ForeignKey(SponsorLevel, verbose_name=_("level")) added = models.DateTimeField(_("added"), default=datetime.datetime.now) active = models.BooleanField(_("active"), default=False) # Denormalization (this assumes only one logo) sponsor_logo = models.ForeignKey("SponsorBenefit", related_name="+", null=True, blank=True, editable=False) objects = SponsorManager() def __unicode__(self): return self.name class Meta: verbose_name = _("sponsor") verbose_name_plural = _("sponsors") def get_absolute_url(self): if self.active: return reverse("sponsor_detail", kwargs={"pk": self.pk}) return reverse("sponsor_list") @property def website_logo(self): if self.sponsor_logo is None: benefits = self.sponsor_benefits.filter( benefit__type="weblogo", upload__isnull=False)[:1] if benefits.count(): if benefits[0].upload: self.sponsor_logo = benefits[0] self.save() return self.sponsor_logo.upload @property def listing_text(self): if not hasattr(self, "_listing_text"): self._listing_text = None # @@@ better than hard-coding a pk but still not good benefits = self.sponsor_benefits.filter(benefit__name="Sponsor Description") if benefits.count(): self._listing_text = benefits[0].text return self._listing_text def reset_benefits(self): """ Reset all benefits for this sponsor to the defaults for their sponsorship level. """ level = None try: level = self.level except SponsorLevel.DoesNotExist: pass allowed_benefits = [] if level: for benefit_level in level.benefit_levels.all(): # Create all needed benefits if they don't exist already sponsor_benefit, created = SponsorBenefit.objects.get_or_create( sponsor=self, benefit=benefit_level.benefit) # and set to default limits for this level. sponsor_benefit.max_words = benefit_level.max_words sponsor_benefit.other_limits = benefit_level.other_limits # and set to active sponsor_benefit.active = True # @@@ We don't call sponsor_benefit.clean here. This means # that if the sponsorship level for a sponsor is adjusted # downwards, an existing too-long text entry can remain, # and won't raise a validation error until it's next # edited. sponsor_benefit.save() allowed_benefits.append(sponsor_benefit.pk) # Any remaining sponsor benefits that don't normally belong to # this level are set to inactive self.sponsor_benefits.exclude(pk__in=allowed_benefits)\ .update(active=False, max_words=None, other_limits="") def send_coordinator_emails(self): pass # @@@ should this just be done centrally? def _store_initial_level(sender, instance, **kwargs): if instance: instance._initial_level_id = instance.level_id post_init.connect(_store_initial_level, sender=Sponsor) def _check_level_change(sender, instance, created, **kwargs): if instance and (created or instance.level_id != instance._initial_level_id): instance.reset_benefits() post_save.connect(_check_level_change, sender=Sponsor) BENEFIT_TYPE_CHOICES = [ ("text", "Text"), ("file", "File"), ("weblogo", "Web Logo"), ("simple", "Simple") ] class Benefit(models.Model): name = models.CharField(_("name"), max_length=100) description = models.TextField(_("description"), blank=True) type = models.CharField(_("type"), choices=BENEFIT_TYPE_CHOICES, max_length=10, default="simple") def __unicode__(self): return self.name class BenefitLevel(models.Model): benefit = models.ForeignKey(Benefit, related_name="benefit_levels", verbose_name=_("benefit")) level = models.ForeignKey(SponsorLevel, related_name="benefit_levels", verbose_name=_("level")) # default limits for this benefit at given level max_words = models.PositiveIntegerField(_("max words"), blank=True, null=True) other_limits = models.CharField(_("other limits"), max_length=200, blank=True) class Meta: ordering = ["level"] def __unicode__(self): return u"%s - %s" % (self.level, self.benefit) class SponsorBenefit(models.Model): sponsor = models.ForeignKey(Sponsor, related_name="sponsor_benefits", verbose_name=_("sponsor")) benefit = models.ForeignKey(Benefit, related_name="sponsor_benefits", verbose_name=_("benefit")) active = models.BooleanField(default=True) # Limits: will initially be set to defaults from corresponding BenefitLevel max_words = models.PositiveIntegerField(_("max words"), blank=True, null=True) other_limits = models.CharField(_("other limits"), max_length=200, blank=True) # Data: zero or one of these fields will be used, depending on the # type of the Benefit (text, file, or simple) text = models.TextField(_("text"), blank=True) upload = models.FileField(_("file"), blank=True, upload_to="sponsor_files") class Meta: ordering = ["-active"] def __unicode__(self): return u"%s - %s" % (self.sponsor, self.benefit) def clean(self): num_words = len(self.text.split()) if self.max_words and num_words > self.max_words: raise ValidationError( "Sponsorship level only allows for %s words, you provided %d." % ( self.max_words, num_words)) def data_fields(self): """ Return list of data field names which should be editable for this ``SponsorBenefit``, depending on its ``Benefit`` type. """ if self.benefit.type == "file" or self.benefit.type == "weblogo": return ["upload"] elif self.benefit.type == "text": return ["text"] return []