Produits Entr'ouvert » Calebasse

# -*- coding: utf-8 -*-

import logging

from datetime import datetime

from django.db import models

from django.contrib.auth.models import User

from calebasse.personnes.models import People

from calebasse.ressources.models import ServiceLinkedAbstractModel

from calebasse.dossiers.states import STATES, STATE_ACCUEIL

logger = logging.getLogger('calebasse.dossiers')

class FileState(models.Model):

    class Meta:

        app_label = 'dossiers'

    patient = models.ForeignKey('dossiers.PatientRecord',

        verbose_name=u'Dossier patient', editable=False)

    state_name = models.CharField(max_length=150)

    created = models.DateTimeField(u'Création', auto_now_add=True)

    date_selected = models.DateTimeField()

    author = \

        models.ForeignKey(User,

        verbose_name=u'Auteur', editable=False)

    comment = models.TextField(max_length=3000, blank=True, null=True)

    previous_state = models.ForeignKey('FileState',

        verbose_name=u'Etat précédent',

        editable=False, blank=True, null=True)

    def get_next_state(self):

        try:

            return FileState.objects.get(previous_state=self)

        except:

            return None

    def save(self, **kwargs):

        self.date_selected = \

            datetime(self.date_selected.year,

                self.date_selected.month, self.date_selected.day)

        super(FileState, self).save(**kwargs)

    def __unicode__(self):

        return self.state_name + ' ' + str(self.date_selected)

class PatientRecord(ServiceLinkedAbstractModel, People):

    class Meta:

        verbose_name = u'Dossier'

        verbose_name_plural = u'Dossiers'

    created = models.DateTimeField(u'création', auto_now_add=True)

    creator = \

        models.ForeignKey(User,

        verbose_name=u'Créateur dossier patient',

        editable=False)

    contacts = models.ManyToManyField('personnes.People',

            related_name='contact_of')

    def __init__(self, *args, **kwargs):

        super(PatientRecord, self).__init__(*args, **kwargs)

        if not hasattr(self, 'service'):

            raise Exception('The field service is mandatory.')

    def get_state(self):

        last_state = self.filestate_set.latest('date_selected')

        multiple = self.filestate_set.\

            filter(date_selected=last_state.date_selected)

        if len(multiple) > 1:

            last_state = multiple.latest('created')

        return last_state

    def get_state_at_day(self, date):

        state = self.get_state()

        while(state):

            if datetime(state.date_selected.year,

                    state.date_selected.month, state.date_selected.day) <= \

                    datetime(date.year, date.month, date.day):

                return state

            state = state.previous_state

        return None

    def was_in_state_at_day(self, date, state_name):

        state_at_day = self.get_state_at_day(date)

        if state_at_day and state_at_day.state_name == state_name:

            return True

        return False

    def get_states_history(self):

        return self.filestate_set.order_by('date_selected')

    def set_state(self, state_name, author, date_selected=None, comment=None):

        if not author:

            raise Exception('Missing author to set state')

        if not state_name in STATES[self.service.name].keys():

            raise Exception('Etat de dossier '

                'non existant dans le service %s.' % self.service.name)

        if not date_selected:

            date_selected = datetime.now()

        current_state = self.get_state()

        if not current_state:

            raise Exception('Invalid patient record. '

                'Missing current state.')

        if date_selected < current_state.date_selected:

            raise Exception('You cannot set a state starting the %s that '

                'is before the previous state starting at day %s.' % \

                (str(date_selected), str(current_state.date_selected)))

        FileState(patient=self, state_name=state_name,

            date_selected=date_selected, author=author, comment=comment,

            previous_state=current_state).save()

    def change_day_selected_of_state(self, state, new_date):

        if state.previous_state:

            if new_date < state.previous_state.date_selected:

                raise Exception('You cannot set a state starting the %s '

                    'before the previous state starting at day %s.' % \

                    (str(new_date), str(state.previous_state.date_selected)))

        next_state = state.get_next_state()

        if next_state:

            if new_date > next_state.date_selected:

                raise Exception('You cannot set a state starting the %s '

                    'after the following state starting at day %s.' % \

                    (str(new_date), str(next_state.date_selected)))

        state.date_selected = new_date

        state.save()

    def remove_state(self, state):

        if state.patient.id != self.id:

            raise Exception('The state given is not about this patient '

                'record but about %s' % state.patient)

        next_state = state.get_next_state()

        if not next_state:

            self.remove_last_state()

        else:

            next_state.previous_state = state.previous_state

            next_state.save()

            state.delete()

    def remove_last_state(self):

        try:

            self.get_state().delete()

        except:

            pass

def create_patient(first_name, last_name, service, creator,

        date_selected=None):

    logger.debug('create_patient: creation for patient %s %s in service %s '

        'by %s' % (first_name, last_name, service, creator))

    if not (first_name and last_name and service and creator):

        raise Exception('Missing parameter to create a patient record.')

    patient = PatientRecord(first_name=first_name, last_name=last_name,

        service=service, creator=creator)

    patient.save()

    if not date_selected:

        date_selected = patient.created

    FileState(patient=patient, state_name=STATE_ACCUEIL[service.name],

        date_selected=date_selected, author=creator,

        previous_state=None).save()

    return patient