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path: root/src/authentic2_cut/models.py
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# -*- coding: utf-8 -*-

from datetime import timedelta

from django.contrib.contenttypes.models import ContentType
from django.db import models
from django.conf import settings
from django.db.models.query import Q
from django.utils.timezone import now

from django.contrib.contenttypes.fields import GenericForeignKey


class Journal(models.Model):
    timestamp = models.DateTimeField(
        verbose_name=u'Horodatage',
        db_index=True,
        auto_now_add=True)
    actor = models.ForeignKey(
        settings.AUTH_USER_MODEL,
        verbose_name=u'Auteur',
        related_name='actor_journal')
    subject = models.ForeignKey(
        settings.AUTH_USER_MODEL,
        verbose_name='Sujet',
        null=True,
        related_name='subject_journal')
    message = models.TextField(
        verbose_name='Message')

    class Meta:
        verbose_name = 'historique'
        verbose_name_plural = 'historiques'
        ordering = ('-timestamp', '-id')


class ValidationRequestManager(models.Manager):
    def for_origin(self, origin):
        ct = ContentType.objects.get_for_model(origin)
        pk = origin.pk
        return self.filter(origin_ct=ct, origin_id=pk)

    def next_request(self, user, after=None):
        qs = self.select_for_update()
        qs = qs.order_by('pk')
        # la demande est nouvelle
        # la demande est en cours de traitement mais
        # aucune date de prise en main n'est posée
        # la demande est prise depuis plus d'une heure
        # la demande est prise par <user>
        qs = qs.filter(
            Q(status=ValidationRequest.STATUS_RECEIVED) &
            (Q(taken__isnull=True) |
             Q(taken__lt=now() - timedelta(seconds=self.model.TAKEN_DELAY)) |
             Q(taken_by=user)))
        # on veut la prochaine demande à traiter
        if after:
            qs = qs.filter(pk__gt=after.pk)
        validation_request = qs[:1].first()
        if validation_request:
            # la demande est associée à l'utilisateur en cours
            validation_request.taken_by = user
            validation_request.taken = now()
            validation_request.save()
        return validation_request

    def received(self):
        return self.filter(status=ValidationRequest.STATUS_RECEIVED)


class ValidationRequest(models.Model):
    TAKEN_DELAY = 3600

    STATUS_RECEIVED = 'received'
    STATUS_ACCEPTED = 'accepted'
    STATUS_REFUSED = 'refused'

    STATUS_CHOICES = (
        (STATUS_RECEIVED, u'reçue'),
        (STATUS_ACCEPTED, u'acceptée'),
        (STATUS_REFUSED, u'refusée'),
    )

    REASON_UNREADABLE = 'unreadable'
    REASON_INVALID = 'invalid'
    REASON_UNDERAGED = 'underaged'
    REASON_CHOICES = (
        (REASON_UNREADABLE, u'Pièce(s) illisible(s)'),
        (REASON_INVALID, u'Pièce(s) invalides(s)'),
        (REASON_UNDERAGED, u'Invividu mineur'),
    )

    created = models.DateTimeField(
        verbose_name=u'Date de création',
        db_index=True,
        auto_now_add=True)
    origin_ct = models.ForeignKey(
        'contenttypes.ContentType',
        verbose_name='origin ct')
    origin_id = models.PositiveIntegerField(
        verbose_name='origin id')
    origin = GenericForeignKey('origin_ct', 'origin_id')
    user = models.ForeignKey(
        settings.AUTH_USER_MODEL,
        verbose_name=u'Utilisateur',
        related_name='validation_requests')
    status = models.CharField(
        max_length=16,
        choices=STATUS_CHOICES,
        verbose_name=u'Statut',
        default=STATUS_RECEIVED)
    reason = models.TextField(
        choices=REASON_CHOICES,
        blank=True,
        verbose_name=u'Raison du refus')
    validated = models.DateTimeField(
        null=True,
        blank=True,
        verbose_name=u'Date de validation')
    validated_by = models.ForeignKey(
        settings.AUTH_USER_MODEL,
        verbose_name=u'Validé/refusé par',
        null=True,
        blank=True,
        related_name='validation_requests_validated')
    external_id = models.TextField(
        blank=True,
        null=True,
        verbose_name=u'Identifiant externe')
    taken = models.DateTimeField(
        verbose_name=u'En cours',
        null=True)
    taken_by = models.ForeignKey(
        settings.AUTH_USER_MODEL,
        verbose_name=u'Traité par',
        null=True,
        related_name='validation_requests_taken')

    objects = ValidationRequestManager()

    @property
    def is_taken(self):
        return self.taken and now() - self.taken < timedelta(seconds=self.TAKEN_DELAY)

    def get_taken(self):
        return self.taken if self.is_taken else None

    def get_taken_by(self):
        return self.taken_by if self.is_taken else None

    @property
    def human_status(self):
        if self.status == self.STATUS_REFUSED:
            return u'refusé'
        elif self.status == self.STATUS_ACCEPTED:
            return u'accepté'
        elif self.status == self.STATUS_RECEIVED:
            if self.is_taken:
                return u'en traitement'
            else:
                return u'reçu'
        else:
            raise NotImplementedError

    @property
    def human_status_who(self):
        if self.status == self.STATUS_REFUSED:
            return self.validated_by
        elif self.status == self.STATUS_ACCEPTED:
            return self.validated_by
        elif self.status == self.STATUS_RECEIVED:
            if self.is_taken:
                return self.taken_by

    class Meta:
        verbose_name = u'Requête de validation'
        verbose_name_plural = u'Requêtes de validation'
        ordering = ('-created',)
        unique_together = (
            ('origin_ct', 'origin_id', 'user', 'external_id'),
        )


class ValidationRequestAttachment(models.Model):
    validation_request = models.ForeignKey(
        ValidationRequest,
        verbose_name=u'requête de validation',
        related_name='attachments')

    image = models.ImageField(
        verbose_name='contenu')

    class Meta:
        ordering = ('pk',)
        verbose_name = u'Pièce jointe'
        verbose_name_plural = u'Pièces jointes'