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 import Q
   6 from django.db.models.signals import pre_delete
   7 from timezones.fields import TimeZoneField
   8 from auf_savoirs_en_partage.backend_config import RESOURCES
   9 from savoirs.globals import META
  10 from settings import CALENDRIER_URL
  11 from datamaster_modeles.models import Thematique, Pays, Region
  12 from lib.calendrier import combine
  13 from caldav.lib import error
  14
  15 class Discipline(models.Model):
  16     id = models.IntegerField(primary_key=True, db_column='id_discipline')
  17     nom = models.CharField(max_length=765, db_column='nom_discipline')
  18
  19     def __unicode__ (self):
  20         return self.nom
  21
  22     class Meta:
  23         db_table = u'discipline'
  24         ordering = ["nom",]
  25
  26 class SourceActualite(models.Model):
  27     nom = models.CharField(max_length=255)
  28     url = models.CharField(max_length=255)
  29
  30     def __unicode__(self,):
  31         return u"%s" % self.nom
  32
  33 class ActualiteManager(models.Manager):
  34
  35     def get_query_set(self):
  36         return ActualiteQuerySet(self.model)
  37
  38     def search(self, text):
  39         return self.get_query_set().search(text)
  40
  41 class ActualiteQuerySet(models.query.QuerySet):
  42
  43     def search(self, text):
  44         return self.filter(Q(titre__icontains=text) | Q(texte__icontains=text))
  45
  46 class Actualite(models.Model):
  47     id = models.AutoField(primary_key=True, db_column='id_actualite')
  48     titre = models.CharField(max_length=765, db_column='titre_actualite')
  49     texte = models.TextField(db_column='texte_actualite')
  50     url = models.CharField(max_length=765, db_column='url_actualite')
  51     date = models.DateField(db_column='date_actualite')
  52     visible = models.BooleanField(db_column='visible_actualite', default = False)
  53     ancienid = models.IntegerField(db_column='ancienId_actualite', blank = True, null = True)
  54     source = models.ForeignKey(SourceActualite, blank = True, null = True)
  55     disciplines = models.ManyToManyField(Discipline, blank=True, related_name="actualites")
  56     regions = models.ManyToManyField(Region, blank=True, related_name="actualites", verbose_name='Régions')
  57
  58     objects = ActualiteManager()
  59
  60     class Meta:
  61         db_table = u'actualite'
  62         ordering = ["-date",]
  63
  64     def __unicode__ (self):
  65         return "%s" % (self.titre)
  66
  67     def assigner_disciplines(self, disciplines):
  68         self.disciplines.add(*disciplines)
  69
  70     def assigner_regions(self, regions):
  71         self.regions.add(*regions)
  72
  73 class EvenementManager(models.Manager):
  74
  75     def get_query_set(self):
  76         return EvenementQuerySet(self.model)
  77
  78     def search(self, text):
  79         return self.get_query_set().search(text)
  80
  81 class EvenementQuerySet(models.query.QuerySet):
  82
  83     def search(self, text):
  84         qs = self
  85         q = None
  86         for word in text.split():
  87             part = (Q(titre__icontains=word) |
  88                     Q(mots_cles__icontains=word) |
  89                     Q(discipline__nom__icontains=word) |
  90                     Q(discipline_secondaire__nom__icontains=word) |
  91                     Q(type__icontains=word) |
  92                     Q(lieu__icontains=word) |
  93                     Q(description__icontains=word) |
  94                     Q(contact__icontains=word))
  95             if q is None:
  96                 q = part
  97             else:
  98                 q = q & part
  99         return qs.filter(q) if q is not None else qs
 100
 101     def search_titre(self, text):
 102         qs = self
 103         for word in text.split():
 104             qs = qs.filter(titre__icontains=word)
 105         return qs
 106
 107 class Evenement(models.Model):
 108     TYPE_CHOICES = ((u'Colloque', u'Colloque'),
 109                     (u'Conférence', u'Conférence'),
 110                     (u'Appel à contribution', u'Appel à contribution'),
 111                     (u'Journée d\'étude', u'Journée d\'étude'),
 112                     (None, u'Autre'))
 113
 114     uid = models.CharField(max_length = 255, default = str(uuid.uuid1()))
 115     approuve = models.BooleanField(default = False)
 116     titre = models.CharField(max_length=255)
 117     discipline = models.ForeignKey('Discipline', related_name = "discipline",
 118                                    blank = True, null = True)
 119     discipline_secondaire = models.ForeignKey('Discipline', related_name = \
 120                                               "discipline_secondaire",
 121                                               verbose_name = \
 122                                               "Discipline secondaire",
 123                                               blank = True, null = True)
 124     mots_cles = models.TextField('Mots-Clés', blank = True, null = True)
 125     type = models.CharField(max_length=255, choices=TYPE_CHOICES)
 126     fuseau = TimeZoneField(verbose_name = 'Fuseau horaire')
 127     debut = models.DateTimeField(default = datetime.datetime.now)
 128     fin = models.DateTimeField(default = datetime.datetime.now)
 129     lieu = models.TextField()
 130     description = models.TextField(blank = True, null = True)
 131     #fichiers = TODO?
 132     contact = models.TextField(blank = True, null = True)
 133     url = models.CharField(max_length=255, blank = True, null = True)
 134     regions = models.ManyToManyField(Region, blank=True, related_name="evenements", verbose_name='Régions')
 135
 136     objects = EvenementManager()
 137
 138     class Meta:
 139         ordering = ['-debut']
 140
 141     def __unicode__(self,):
 142         return "[%s] %s" % (self.uid, self.titre)
 143
 144     def clean(self):
 145         from django.core.exceptions import ValidationError
 146         if self.debut > self.fin:
 147             raise ValidationError('La date de fin ne doit pas être antérieure à la date de début')
 148
 149     def save(self, *args, **kwargs):
 150         """Sauvegarde l'objet dans django et le synchronise avec caldav s'il a été
 151         approuvé"""
 152         self.clean()
 153         self.update_vevent()
 154         super(Evenement, self).save(*args, **kwargs)
 155
 156     # methodes de commnunications avec CALDAV
 157     def as_ical(self,):
 158         """Retourne l'evenement django sous forme d'objet icalendar"""
 159         cal = vobject.iCalendar()
 160         cal.add('vevent')
 161
 162         # fournit son propre uid
 163         if self.uid in [None, ""]:
 164             self.uid = str(uuid.uuid1())
 165
 166         cal.vevent.add('uid').value = self.uid
 167
 168         cal.vevent.add('summary').value = self.titre
 169
 170         if self.mots_cles is None:
 171             kw = []
 172         else:
 173             kw = self.mots_cles.split(",")
 174
 175         try:
 176             kw.append(self.discipline.nom)
 177             kw.append(self.discipline_secondaire.nom)
 178             kw.append(self.type)
 179         except: pass
 180
 181         kw = [x.strip() for x in kw if len(x.strip()) > 0 and x is not None]
 182         for k in kw:
 183             cal.vevent.add('x-auf-keywords').value = k
 184
 185         description = self.description
 186         if len(kw) > 0:
 187             if len(self.description) > 0:
 188                 description += "\n"
 189             description += u"Mots-clés: " + ", ".join(kw)
 190
 191         cal.vevent.add('dtstart').value = combine(self.debut, self.fuseau)
 192         cal.vevent.add('dtend').value = combine(self.fin, self.fuseau)
 193         cal.vevent.add('created').value = combine(datetime.datetime.now(), "UTC")
 194         cal.vevent.add('dtstamp').value = combine(datetime.datetime.now(), "UTC")
 195         if len(description) > 0:
 196             cal.vevent.add('description').value = description
 197         if len(self.contact) > 0:
 198             cal.vevent.add('contact').value = self.contact
 199         if len(self.url) > 0:
 200             cal.vevent.add('url').value = self.url
 201         if len(self.lieu) > 0:
 202             cal.vevent.add('location').value = self.lieu
 203         return cal
 204
 205     def update_vevent(self,):
 206         """Essaie de créer l'évènement sur le serveur ical.
 207         En cas de succès, l'évènement local devient donc inactif et approuvé"""
 208         try:
 209             if self.approuve:
 210                 event = self.as_ical()
 211                 client = caldav.DAVClient(CALENDRIER_URL)
 212                 cal = caldav.Calendar(client, url = CALENDRIER_URL)
 213                 e = caldav.Event(client, parent = cal, data = event.serialize(), id=self.uid)
 214                 e.save()
 215         except:
 216             self.approuve = False
 217
 218     def delete_vevent(self,):
 219         """Supprime l'evenement sur le serveur caldav"""
 220         try:
 221             if self.approuve:
 222                 event = self.as_ical()
 223                 client = caldav.DAVClient(CALENDRIER_URL)
 224                 cal = caldav.Calendar(client, url = CALENDRIER_URL)
 225                 e = cal.event(self.uid)
 226                 e.delete()
 227         except error.NotFoundError:
 228             pass
 229
 230     def assigner_regions(self, regions):
 231         self.regions.add(*regions)
 232
 233     def assigner_disciplines(self, disciplines):
 234         if len(disciplines) == 1:
 235             if self.discipline:
 236                 self.discipline_secondaire = disciplines[0]
 237             else:
 238                 self.discipline = disciplines[0]
 239         elif len(disciplines) >= 2:
 240             self.discipline = disciplines[0]
 241             self.discipline_secondaire = disciplines[1]
 242
 243
 244 # Surcharge du comportement de suppression
 245 # La méthode de connexion par signals est préférable à surcharger la méthode delete()
 246 # car dans le cas de la suppression par lots, cell-ci n'est pas invoquée
 247 def delete_vevent(sender, instance, *args, **kwargs):
 248     instance.delete_vevent()
 249
 250 pre_delete.connect(delete_vevent, sender = Evenement)
 251
 252
 253 class ListSet(models.Model):
 254     spec = models.CharField(primary_key = True, max_length = 255)
 255     name = models.CharField(max_length = 255)
 256     server = models.CharField(max_length = 255)
 257     validated = models.BooleanField(default = True)
 258
 259     def __unicode__(self,):
 260         return self.name
 261
 262 class RecordManager(models.Manager):
 263
 264     def get_query_set(self):
 265         return RecordQuerySet(self.model)
 266
 267     def search(self, text):
 268         return self.get_query_set().search(text)
 269
 270     def validated(self):
 271         return self.get_query_set().validated()
 272
 273 class RecordQuerySet(models.query.QuerySet):
 274
 275     def search(self, text):
 276         qs = self
 277         words = text.split()
 278
 279         # Ne garder que les ressources qui contiennent tous les mots
 280         # demandés.
 281         q = None
 282         for word in words:
 283             part = (Q(title__icontains=word) | Q(description__icontains=word) |
 284                     Q(creator__icontains=word) | Q(contributor__icontains=word) |
 285                     Q(subject__icontains=word) | Q(disciplines__nom__icontains=word) |
 286                     Q(regions__nom__icontains=word) | Q(pays__nom__icontains=word))
 287             if q is None:
 288                 q = part
 289             else:
 290                 q = q & part
 291         if q is not None:
 292             qs = qs.filter(q).distinct()
 293
 294         # On donne un point pour chaque mot présent dans le titre.
 295         if words:
 296             score_expr = ' + '.join(['(title LIKE %s)'] * len(words))
 297             score_params = ['%' + word + '%' for word in words]
 298             qs = qs.extra(
 299                 select={'score': score_expr},
 300                 select_params=score_params
 301             ).order_by('-score')
 302
 303         return qs
 304
 305     def search_auteur(self, text):
 306         qs = self
 307         for word in text.split():
 308             qs = qs.filter(Q(creator__icontains=word) | Q(contributor__icontains=word))
 309         return qs
 310
 311     def search_sujet(self, text):
 312         qs = self
 313         for word in text.split():
 314             qs = qs.filter(subject__icontains=word)
 315         return qs
 316
 317     def search_titre(self, text):
 318         qs = self
 319         for word in text.split():
 320             qs = qs.filter(title__icontains=word)
 321         return qs
 322
 323     def validated(self):
 324         """Ne garder que les ressources validées et qui sont soit dans aucun
 325            listset ou au moins dans un listset validé."""
 326         qs = self.filter(validated=True)
 327         qs = qs.extra(where=['''((savoirs_record.id NOT IN (SELECT record_id FROM savoirs_record_listsets)) OR
 328                                  ((SELECT MAX(l.validated) FROM savoirs_listset l
 329                                    INNER JOIN savoirs_record_listsets rl ON rl.listset_id = l.spec
 330                                    WHERE rl.record_id = savoirs_record.id) = TRUE))'''])
 331         return qs
 332
 333 class Record(models.Model):
 334
 335     #fonctionnement interne
 336     id = models.AutoField(primary_key = True)
 337     server = models.CharField(max_length = 255)
 338     last_update = models.CharField(max_length = 255)
 339     last_checksum = models.CharField(max_length = 255)
 340     validated = models.BooleanField(default = True)
 341
 342     #OAI
 343     title = models.TextField(null = True, blank = True)
 344     creator = models.TextField(null = True, blank = True)
 345     description = models.TextField(null = True, blank = True)
 346     modified = models.CharField(max_length = 255, null = True, blank = True)
 347     identifier = models.CharField(max_length = 255, null = True, blank = True, unique = True)
 348     uri = models.CharField(max_length = 255, null = True, blank = True, unique = True)
 349     source = models.TextField(null = True, blank = True)
 350     contributor = models.TextField(null = True, blank = True)
 351     subject = models.TextField(null = True, blank = True)
 352     publisher = models.TextField(null = True, blank = True)
 353     type = models.TextField(null = True, blank = True)
 354     format = models.TextField(null = True, blank = True)
 355     language = models.TextField(null = True, blank = True)
 356
 357     listsets = models.ManyToManyField(ListSet, null = True, blank = True)
 358
 359     #SEP 2 (aucune données récoltées)
 360     alt_title = models.TextField(null = True, blank = True)
 361     abstract = models.TextField(null = True, blank = True)
 362     creation = models.CharField(max_length = 255, null = True, blank = True)
 363     issued = models.CharField(max_length = 255, null = True, blank = True)
 364     isbn = models.TextField(null = True, blank = True)
 365     orig_lang = models.TextField(null = True, blank = True)
 366
 367     # Metadata AUF multivaluées
 368     disciplines = models.ManyToManyField(Discipline)
 369     thematiques = models.ManyToManyField(Thematique)
 370     pays = models.ManyToManyField(Pays)
 371     regions = models.ManyToManyField(Region, verbose_name='Régions')
 372
 373     # Manager
 374     objects = RecordManager()
 375
 376     def __unicode__(self):
 377         return "[%s] %s" % (self.server, self.title)
 378
 379     def getServeurURL(self):
 380         """Retourne l'URL du serveur de provenance"""
 381         return RESOURCES[self.server]['url']
 382
 383     def est_complet(self):
 384         """teste si le record à toutes les données obligatoires"""
 385         return self.disciplines.count() > 0 and \
 386            self.thematiques.count() > 0 and \
 387            self.pays.count() > 0 and \
 388            self.regions.count() > 0
 389
 390     def assigner_regions(self, regions):
 391         self.regions.add(*regions)
 392
 393     def assigner_disciplines(self, disciplines):
 394         self.disciplines.add(*disciplines)
 395
 396
 397 class Serveur(models.Model):
 398     """Identification d'un serveur d'ou proviennent les références"""
 399     nom = models.CharField(primary_key = True, max_length = 255)
 400
 401     def __unicode__(self,):
 402         return self.nom
 403
 404     def conf_2_db(self,):
 405         for k in RESOURCES.keys():
 406             s, created = Serveur.objects.get_or_create(nom=k)
 407             s.nom = k
 408             s.save()
 409
 410 class Profile(models.Model):
 411     user = models.ForeignKey(User, unique=True)
 412     serveurs = models.ManyToManyField(Serveur, null = True, blank = True)
 413
 414 class HarvestLog(models.Model):
 415     context = models.CharField(max_length = 255)
 416     name = models.CharField(max_length = 255)
 417     date = models.DateTimeField(auto_now = True)
 418     added = models.IntegerField(null = True, blank = True)
 419     updated = models.IntegerField(null = True, blank = True)
 420     processed = models.IntegerField(null = True, blank = True)
 421     record = models.ForeignKey(Record, null = True, blank = True)
 422
 423     @staticmethod
 424     def add(message):
 425         logger = HarvestLog()
 426         if message.has_key('record_id'):
 427             message['record'] = Record.objects.get(id=message['record_id'])
 428             del(message['record_id'])
 429
 430         for k,v in message.items():
 431             setattr(logger, k, v)
 432         logger.save()