auf_savoirs_en_partage/savoirs/models.py

   1 # -*- encoding: utf-8 -*-
   2 import simplejson, uuid, datetime, caldav, vobject, uuid
   3 from django.contrib.auth.models import User
   4 from django.db import models
   5 from django.db.models.signals import pre_delete
   6 from timezones.fields import TimeZoneField
   7 from auf_savoirs_en_partage.backend_config import RESOURCES
   8 from savoirs.globals import META
   9 from settings import CALENDRIER_URL
  10 from datamaster_modeles.models import Thematique, Pays, Region
  11 from lib.calendrier import combine
  12 from caldav.lib import error
  13
  14 class Discipline(models.Model):
  15     id = models.IntegerField(primary_key=True, db_column='id_discipline')
  16     nom = models.CharField(max_length=765, db_column='nom_discipline')
  17
  18     def __unicode__ (self):
  19         return self.nom
  20
  21     class Meta:
  22         db_table = u'discipline'
  23         ordering = ["nom",]
  24
  25 class SourceActualite(models.Model):
  26     nom = models.CharField(max_length=255)
  27     url = models.CharField(max_length=255)
  28
  29     def __unicode__(self,):
  30         return u"%s" % self.nom
  31
  32 class ActualiteManager(models.Manager):
  33
  34     def get_query_set(self):
  35         return ActualiteQuerySet(self.model)
  36
  37 class ActualiteQuerySet(models.query.QuerySet):
  38
  39     def search(self, text):
  40         return self.filter(titre__icontains=text)
  41
  42 class Actualite(models.Model):
  43     id = models.AutoField(primary_key=True, db_column='id_actualite')
  44     titre = models.CharField(max_length=765, db_column='titre_actualite')
  45     texte = models.TextField(db_column='texte_actualite')
  46     url = models.CharField(max_length=765, db_column='url_actualite')
  47     date = models.DateField(db_column='date_actualite')
  48     visible = models.BooleanField(db_column='visible_actualite', default = False)
  49     ancienid = models.IntegerField(db_column='ancienId_actualite', blank = True, null = True)
  50     source = models.ForeignKey(SourceActualite, blank = True, null = True)
  51
  52     objects = ActualiteManager()
  53
  54     def __unicode__ (self):
  55         return "%s" % (self.titre)
  56
  57     class Meta:
  58         db_table = u'actualite'
  59         ordering = ["-date",]
  60
  61 class Evenement(models.Model):
  62     uid = models.CharField(max_length = 255, default = str(uuid.uuid1()))
  63     approuve = models.BooleanField(default = False)
  64     titre = models.CharField(max_length=255)
  65     discipline = models.ForeignKey('Discipline', related_name = "discipline",
  66                                    blank = True, null = True)
  67     discipline_secondaire = models.ForeignKey('Discipline', related_name = \
  68                                               "discipline_secondaire",
  69                                               verbose_name = \
  70                                               "Discipline secondaire",
  71                                               blank = True, null = True)
  72     mots_cles = models.TextField('Mots-Clés', blank = True, null = True)
  73     type = models.CharField(max_length = 255, choices = \
  74                             (('Colloque', 'Colloque'),
  75                              ('Conférence', 'Conférence'),
  76                              ('Appel à contribution', 'Appel à contribution'),
  77                              ('Journée d\'étude', 'Journée d\'étude'),
  78                              (None, 'Autre')
  79                             )) #TODO: choices
  80     fuseau = TimeZoneField(verbose_name = 'Fuseau horaire')
  81     debut = models.DateTimeField(default = datetime.datetime.now)
  82     fin = models.DateTimeField(default = datetime.datetime.now)
  83     lieu = models.TextField()
  84     description = models.TextField(blank = True, null = True)
  85     #fichiers = TODO?
  86     contact = models.TextField(blank = True, null = True)
  87     url = models.CharField(max_length=255, blank = True, null = True)
  88
  89     def __unicode__(self,):
  90         return "[%s] %s" % (self.uid, self.titre)
  91
  92     def save(self, *args, **kwargs):
  93         """Sauvegarde l'objet dans django et le synchronise avec caldav s'il a été
  94         approuvé"""
  95         self.update_vevent()
  96         super(Evenement, self).save(*args, **kwargs)
  97
  98     # methodes de commnunications avec CALDAV
  99     def as_ical(self,):
 100         """Retourne l'evenement django sous forme d'objet icalendar"""
 101         cal = vobject.iCalendar()
 102         cal.add('vevent')
 103
 104         # fournit son propre uid
 105         if self.uid in [None, ""]:
 106             self.uid = str(uuid.uuid1())
 107
 108         cal.vevent.add('uid').value = self.uid
 109
 110         cal.vevent.add('summary').value = self.titre
 111
 112         if self.mots_cles is None:
 113             kw = []
 114         else:
 115             kw = self.mots_cles.split(",")
 116
 117         try:
 118             kw.append(self.discipline.nom)
 119             kw.append(self.discipline_secondaire.nom)
 120             kw.append(self.type)
 121         except: pass
 122
 123         kw = [x.strip() for x in kw if len(x.strip()) > 0 and x is not None]
 124         for k in kw:
 125             cal.vevent.add('x-auf-keywords').value = k
 126
 127         description = self.description
 128         if len(kw) > 0:
 129             if len(self.description) > 0:
 130                 description += "\n"
 131             description += u"Mots-clés: " + ", ".join(kw)
 132
 133         cal.vevent.add('dtstart').value = combine(self.debut, self.fuseau)
 134         cal.vevent.add('dtend').value = combine(self.fin, self.fuseau)
 135         cal.vevent.add('created').value = combine(datetime.datetime.now(), "UTC")
 136         cal.vevent.add('dtstamp').value = combine(datetime.datetime.now(), "UTC")
 137         if len(description) > 0:
 138             cal.vevent.add('description').value = description
 139         if len(self.contact) > 0:
 140             cal.vevent.add('contact').value = self.contact
 141         if len(self.url) > 0:
 142             cal.vevent.add('url').value = self.url
 143         if len(self.lieu) > 0:
 144             cal.vevent.add('location').value = self.lieu
 145         return cal
 146
 147     def update_vevent(self,):
 148         """Essaie de créer l'évènement sur le serveur ical.
 149         En cas de succès, l'évènement local devient donc inactif et approuvé"""
 150         try:
 151             if self.approuve:
 152                 event = self.as_ical()
 153                 client = caldav.DAVClient(CALENDRIER_URL)
 154                 cal = caldav.Calendar(client, url = CALENDRIER_URL)
 155                 e = caldav.Event(client, parent = cal, data = event.serialize(), id=self.uid)
 156                 e.save()
 157         except:
 158             self.approuve = False
 159
 160     def delete_vevent(self,):
 161         """Supprime l'evenement sur le serveur caldav"""
 162         try:
 163             if self.approuve:
 164                 event = self.as_ical()
 165                 client = caldav.DAVClient(CALENDRIER_URL)
 166                 cal = caldav.Calendar(client, url = CALENDRIER_URL)
 167                 e = cal.event(self.uid)
 168                 e.delete()
 169         except error.NotFoundError:
 170             pass
 171
 172
 173 # Surcharge du comportement de suppression
 174 # La méthode de connexion par signals est préférable à surcharger la méthode delete()
 175 # car dans le cas de la suppression par lots, cell-ci n'est pas invoquée
 176 def delete_vevent(sender, instance, *args, **kwargs):
 177     instance.delete_vevent()
 178
 179 pre_delete.connect(delete_vevent, sender = Evenement)
 180
 181
 182 class ListSet(models.Model):
 183     spec = models.CharField(primary_key = True, max_length = 255)
 184     name = models.CharField(max_length = 255)
 185     server = models.CharField(max_length = 255)
 186     validated = models.BooleanField(default = True)
 187
 188     def __unicode__(self,):
 189         return self.name
 190
 191 class Record(models.Model):
 192
 193     #fonctionnement interne
 194     id = models.AutoField(primary_key = True)
 195     server = models.CharField(max_length = 255)
 196     last_update = models.CharField(max_length = 255)
 197     last_checksum = models.CharField(max_length = 255)
 198     validated = models.BooleanField(default = True)
 199
 200     #OAI
 201     title = models.TextField(null = True, blank = True)
 202     creator = models.TextField(null = True, blank = True)
 203     description = models.TextField(null = True, blank = True)
 204     modified = models.CharField(max_length = 255, null = True, blank = True)
 205     identifier = models.CharField(max_length = 255, null = True, blank = True, unique = True)
 206     uri = models.CharField(max_length = 255, null = True, blank = True, unique = True)
 207     source = models.TextField(null = True, blank = True)
 208     contributor = models.TextField(null = True, blank = True)
 209     subject = models.TextField(null = True, blank = True)
 210     publisher = models.TextField(null = True, blank = True)
 211     type = models.TextField(null = True, blank = True)
 212     format = models.TextField(null = True, blank = True)
 213     language = models.TextField(null = True, blank = True)
 214
 215     listsets = models.ManyToManyField(ListSet, null = True, blank = True)
 216
 217     #SEP 2 (aucune données récoltées)
 218     alt_title = models.TextField(null = True, blank = True)
 219     abstract = models.TextField(null = True, blank = True)
 220     creation = models.CharField(max_length = 255, null = True, blank = True)
 221     issued = models.CharField(max_length = 255, null = True, blank = True)
 222     isbn = models.TextField(null = True, blank = True)
 223     orig_lang = models.TextField(null = True, blank = True)
 224
 225     # Metadata AUF multivaluées
 226     disciplines = models.ManyToManyField(Discipline)
 227     thematiques = models.ManyToManyField(Thematique)
 228     pays = models.ManyToManyField(Pays)
 229     regions = models.ManyToManyField(Region)
 230
 231     def est_complet(self,):
 232         """teste si le record à toutes les données obligatoires"""
 233         return self.disciplines.count() > 0 and \
 234            self.thematiques.count() > 0 and \
 235            self.pays.count() > 0 and \
 236            self.regions.count() > 0
 237
 238     def __unicode__(self):
 239         return "[%s] %s" % (self.server, self.title)
 240
 241 class Serveur(models.Model):
 242     """Identification d'un serveur d'ou proviennent les références"""
 243     nom = models.CharField(primary_key = True, max_length = 255)
 244
 245     def __unicode__(self,):
 246         return self.nom
 247
 248     def conf_2_db(self,):
 249         for k in RESOURCES.keys():
 250             s, created = Serveur.objects.get_or_create(nom=k)
 251             s.nom = k
 252             s.save()
 253
 254 class Profile(models.Model):
 255     user = models.ForeignKey(User, unique=True)
 256     serveurs = models.ManyToManyField(Serveur, null = True, blank = True)
 257
 258 class HarvestLog(models.Model):
 259     context = models.CharField(max_length = 255)
 260     name = models.CharField(max_length = 255)
 261     date = models.DateTimeField(auto_now = True)
 262     added = models.IntegerField(null = True, blank = True)
 263     updated = models.IntegerField(null = True, blank = True)
 264     processed = models.IntegerField(null = True, blank = True)
 265     record = models.ForeignKey(Record, null = True, blank = True)
 266
 267     @staticmethod
 268     def add(message):
 269         logger = HarvestLog()
 270         if message.has_key('record_id'):
 271             message['record'] = Record.objects.get(id=message['record_id'])
 272             del(message['record_id'])
 273
 274         for k,v in message.items():
 275             setattr(logger, k, v)
 276         logger.save()