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