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