models.py 29.8 KB
Newer Older
Skia's avatar
Skia committed
1
from django.db import models
Skia's avatar
Skia committed
2
from django.contrib.auth.models import AbstractBaseUser, PermissionsMixin, UserManager, Group as AuthGroup, GroupManager as AuthGroupManager, AnonymousUser as AuthAnonymousUser
Skia's avatar
Skia committed
3 4
from django.utils.translation import ugettext_lazy as _
from django.utils import timezone
5 6
from django.core import validators
from django.core.exceptions import ValidationError
7
from django.core.urlresolvers import reverse
8
from django.conf import settings
Skia's avatar
Skia committed
9
from django.db import transaction
10 11
from django.contrib.staticfiles.storage import staticfiles_storage
from django.utils.html import escape
Skia's avatar
Skia committed
12 13
from phonenumber_field.modelfields import PhoneNumberField

14
from datetime import datetime, timedelta, date
Skia's avatar
Skia committed
15

Skia's avatar
Skia committed
16 17
import unicodedata

Skia's avatar
Skia committed
18 19 20 21 22 23 24 25
class RealGroupManager(AuthGroupManager):
    def get_queryset(self):
        return super(RealGroupManager, self).get_queryset().filter(is_meta=False)

class MetaGroupManager(AuthGroupManager):
    def get_queryset(self):
        return super(MetaGroupManager, self).get_queryset().filter(is_meta=True)

Skia's avatar
Skia committed
26
class Group(AuthGroup):
Skia's avatar
Skia committed
27 28 29 30 31
    is_meta = models.BooleanField(
        _('meta group status'),
        default=False,
        help_text=_('Whether a group is a meta group or not'),
    )
Skia's avatar
Skia committed
32
    description = models.CharField(_('description'), max_length=60)
Skia's avatar
Skia committed
33 34 35 36
    def get_absolute_url(self):
        """
        This is needed for black magic powered UpdateView's children
        """
Skia's avatar
Skia committed
37
        return reverse('core:group_list')
Skia's avatar
Skia committed
38

Skia's avatar
Skia committed
39 40 41 42 43 44 45 46 47 48 49 50 51 52
class MetaGroup(Group):
    objects = MetaGroupManager()
    class Meta:
        proxy = True

    def __init__(self, *args, **kwargs):
        super(MetaGroup, self).__init__(*args, **kwargs)
        self.is_meta = True

class RealGroup(Group):
    objects = RealGroupManager()
    class Meta:
        proxy = True

53 54 55 56 57 58 59 60 61
def validate_promo(value):
    start_year = settings.SITH_SCHOOL_START_YEAR
    delta = (date.today()+timedelta(days=180)).year - start_year
    if value < 0 or delta < value:
        raise ValidationError(
            _('%(value)s is not a valid promo (between 0 and %(end)s)'),
            params={'value': value, 'end': delta},
        )

62
class User(AbstractBaseUser):
Skia's avatar
Skia committed
63 64
    """
    Defines the base user class, useable in every app
Skia's avatar
Skia committed
65

Skia's avatar
Skia committed
66 67 68
    This is almost the same as the auth module AbstractUser since it inherits from it,
    but some fields are required, and the username is generated automatically with the
    name of the user (see generate_username()).
Skia's avatar
Skia committed
69

70
    Added field: nick_name, date_of_birth
Skia's avatar
Skia committed
71 72 73 74 75 76
    Required fields: email, first_name, last_name, date_of_birth
    """
    username = models.CharField(
        _('username'),
        max_length=254,
        unique=True,
Skia's avatar
Skia committed
77
        help_text=_('Required. 254 characters or fewer. Letters, digits and ./+/-/_ only.'),
Skia's avatar
Skia committed
78 79
        validators=[
            validators.RegexValidator(
Skia's avatar
Skia committed
80
                r'^[\w.+-]+$',
Skia's avatar
Skia committed
81
                _('Enter a valid username. This value may contain only '
Skia's avatar
Skia committed
82
                  'letters, numbers ' 'and ./+/-/_ characters.')
Skia's avatar
Skia committed
83 84 85 86 87 88
            ),
        ],
        error_messages={
            'unique': _("A user with that username already exists."),
        },
    )
Skia's avatar
Skia committed
89 90
    first_name = models.CharField(_('first name'), max_length=64)
    last_name = models.CharField(_('last name'), max_length=64)
Skia's avatar
Skia committed
91
    email = models.EmailField(_('email address'), unique=True)
Skia's avatar
Skia committed
92
    date_of_birth = models.DateField(_('date of birth'), blank=True, null=True)
Skia's avatar
Skia committed
93
    nick_name = models.CharField(_('nick name'), max_length=64, null=True, blank=True)
Skia's avatar
Skia committed
94 95 96 97 98 99 100 101 102 103 104 105 106
    is_staff = models.BooleanField(
        _('staff status'),
        default=False,
        help_text=_('Designates whether the user can log into this admin site.'),
    )
    is_active = models.BooleanField(
        _('active'),
        default=True,
        help_text=_(
            'Designates whether this user should be treated as active. '
            'Unselect this instead of deleting accounts.'
        ),
    )
Skia's avatar
Skia committed
107
    date_joined = models.DateField(_('date joined'), auto_now_add=True)
Skia's avatar
Skia committed
108
    last_update = models.DateField(_('last update'), auto_now=True)
109 110 111 112 113 114 115 116
    is_superuser = models.BooleanField(
        _('superuser'),
        default=False,
        help_text=_(
            'Designates whether this user is a superuser. '
        ),
    )
    groups = models.ManyToManyField(RealGroup, related_name='users', blank=True)
Skia's avatar
Skia committed
117
    home = models.OneToOneField('SithFile', related_name='home_of', verbose_name=_("home"), null=True, blank=True)
Skia's avatar
Skia committed
118 119 120 121 122 123
    profile_pict = models.OneToOneField('SithFile', related_name='profile_of', verbose_name=_("profile"), null=True,
            blank=True, on_delete=models.SET_NULL)
    avatar_pict = models.OneToOneField('SithFile', related_name='avatar_of', verbose_name=_("avatar"), null=True,
            blank=True, on_delete=models.SET_NULL)
    scrub_pict = models.OneToOneField('SithFile', related_name='scrub_of', verbose_name=_("scrub"), null=True,
            blank=True, on_delete=models.SET_NULL)
124 125 126 127 128 129 130 131 132 133
    sex = models.CharField(_("sex"), max_length=10, choices=[("MAN", _("Man")), ("WOMAN", _("Woman"))], default="MAN")
    tshirt_size = models.CharField(_("tshirt size"), max_length=5, choices=[
        ("-", _("-")),
        ("XS", _("XS")),
        ("S", _("S")),
        ("M", _("M")),
        ("L", _("L")),
        ("XL", _("XL")),
        ("XXL", _("XXL")),
        ("XXXL", _("XXXL")),
Skia's avatar
Skia committed
134
        ], default="-")
135 136 137 138 139 140 141 142
    role = models.CharField(_("role"), max_length=15, choices=[
        ("STUDENT", _("Student")),
        ("ADMINISTRATIVE", _("Administrative agent")),
        ("TEACHER", _("Teacher")),
        ("AGENT", _("Agent")),
        ("DOCTOR", _("Doctor")),
        ("FORMER STUDENT", _("Former student")),
        ("SERVICE", _("Service")),
Skia's avatar
Skia committed
143
        ], blank=True, default="")
144 145 146 147 148 149 150 151 152 153 154 155
    department = models.CharField(_("department"), max_length=15, choices=[
        ("TC", _("TC")),
        ("IMSI", _("IMSI")),
        ("IMAP", _("IMAP")),
        ("INFO", _("INFO")),
        ("GI", _("GI")),
        ("E", _("E")),
        ("EE", _("EE")),
        ("GESC", _("GESC")),
        ("GMC", _("GMC")),
        ("MC", _("MC")),
        ("EDIM", _("EDIM")),
Skia's avatar
Skia committed
156
        ("HUMA", _("Humanities")),
157
        ("NA", _("N/A")),
Skia's avatar
Skia committed
158 159 160 161 162
        ], default="NA", blank=True)
    dpt_option = models.CharField(_("dpt option"), max_length=32, blank=True, default="")
    semester = models.CharField(_("semester"), max_length=5, blank=True, default="")
    quote = models.CharField(_("quote"), max_length=256, blank=True, default="")
    school = models.CharField(_("school"), max_length=80, blank=True, default="")
163
    promo = models.IntegerField(_("promo"), validators=[validate_promo], null=True, blank=True)
Skia's avatar
Skia committed
164 165 166 167 168 169
    forum_signature = models.TextField(_("forum signature"), max_length=256, blank=True, default="")
    second_email = models.EmailField(_('second email address'), null=True, blank=True)
    phone = PhoneNumberField(_("phone"), null=True, blank=True)
    parent_phone = PhoneNumberField(_("parent phone"), null=True, blank=True)
    address = models.CharField(_("address"), max_length=128, blank=True, default="")
    parent_address = models.CharField(_("parent address"), max_length=128, blank=True, default="")
Skia's avatar
Skia committed
170
    is_subscriber_viewable = models.BooleanField(_("is subscriber viewable"), default=True)
Skia's avatar
Skia committed
171
    godfathers = models.ManyToManyField('User', related_name='godchildren', blank=True)
Skia's avatar
Skia committed
172 173 174 175

    objects = UserManager()

    USERNAME_FIELD = 'username'
Skia's avatar
Skia committed
176
    # REQUIRED_FIELDS = ['email']
Skia's avatar
Skia committed
177

178 179 180 181 182 183
    def has_module_perms(self, package_name):
        return self.is_active

    def has_perm(self, perm, obj=None):
        return self.is_active and self.is_superuser

Skia's avatar
Skia committed
184 185 186 187 188 189
    def get_absolute_url(self):
        """
        This is needed for black magic powered UpdateView's children
        """
        return reverse('core:user_profile', kwargs={'user_id': self.pk})

Skia's avatar
Skia committed
190
    def __str__(self):
Skia's avatar
Skia committed
191
        return self.username
Skia's avatar
Skia committed
192

Skia's avatar
Skia committed
193 194 195
    def to_dict(self):
        return self.__dict__

Skia's avatar
Skia committed
196 197
    def is_in_group(self, group_name):
        """If the user is in the group passed in argument (as string)"""
Skia's avatar
Skia committed
198
        if group_name == settings.SITH_GROUPS['public']['name']:
Skia's avatar
Skia committed
199
            return True
Skia's avatar
Skia committed
200
        if group_name == settings.SITH_MAIN_MEMBERS_GROUP: # We check the subscription if asked
Skia's avatar
Skia committed
201
            if 'subscription' in settings.INSTALLED_APPS:
202
                from subscription.models import Subscriber
Skia's avatar
Skia committed
203 204 205 206 207
                s = Subscriber.objects.filter(pk=self.pk).first()
                if s is not None and s.is_subscribed():
                    return True
                else:
                    return False
Skia's avatar
Skia committed
208
            else:
Skia's avatar
Skia committed
209
                return False
Skia's avatar
Skia committed
210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225
        if group_name[-len(settings.SITH_BOARD_SUFFIX):] == settings.SITH_BOARD_SUFFIX:
            from club.models import Club
            name = group_name[:-len(settings.SITH_BOARD_SUFFIX)]
            c = Club.objects.filter(unix_name=name).first()
            mem = c.get_membership_for(self)
            if mem:
                return mem.role > settings.SITH_MAXIMUM_FREE_ROLE
            return False
        if group_name[-len(settings.SITH_MEMBER_SUFFIX):] == settings.SITH_MEMBER_SUFFIX:
            from club.models import Club
            name = group_name[:-len(settings.SITH_MEMBER_SUFFIX)]
            c = Club.objects.filter(unix_name=name).first()
            mem = c.get_membership_for(self)
            if mem:
                return True
            return False
Skia's avatar
Skia committed
226 227
        if group_name == settings.SITH_GROUPS['root']['name'] and self.is_superuser:
            return True
Skia's avatar
Skia committed
228 229
        return self.groups.filter(name=group_name).exists()

Skia's avatar
Skia committed
230
    @property
Skia's avatar
Skia committed
231 232 233
    def is_root(self):
        return self.is_superuser or self.groups.filter(name=settings.SITH_GROUPS['root']['name']).exists()

234
    @property
Sli's avatar
Sli committed
235
    def is_board_member(self):
236
        from club.models import Club
237 238 239
        return Club.objects.filter(unix_name=settings.SITH_MAIN_CLUB['unix_name']).first().get_membership_for(self)

    @property
Sli's avatar
Sli committed
240
    def is_launderette_manager(self):
241 242
        from club.models import Club
        return Club.objects.filter(unix_name=settings.SITH_LAUNDERETTE_MANAGER['unix_name']).first().get_membership_for(self)
243

244 245
    @property
    def is_banned_alcohol(self):
246
        return self.is_in_group(settings.SITH_GROUPS['banned-alcohol']['name'])
247 248 249

    @property
    def is_banned_counter(self):
250
        return self.is_in_group(settings.SITH_GROUPS['banned-from-counters']['name'])
251

Skia's avatar
Skia committed
252
    def save(self, *args, **kwargs):
253
        create = False
Skia's avatar
Skia committed
254 255 256
        with transaction.atomic():
            if self.id:
                old = User.objects.filter(id=self.id).first()
Skia's avatar
Skia committed
257
                if old and old.username != self.username:
Skia's avatar
Skia committed
258
                    self._change_username(self.username)
259 260
            else:
                create = True
Skia's avatar
Skia committed
261
            super(User, self).save(*args, **kwargs)
Sli's avatar
Sli committed
262
            if create and settings.IS_OLD_MYSQL_PRESENT: # Create user on the old site: TODO remove me!
263 264 265 266 267 268 269 270 271 272 273 274 275
                import MySQLdb
                try:
                    db = MySQLdb.connect(**settings.OLD_MYSQL_INFOS)
                    c = db.cursor()
                    c.execute("""INSERT INTO utilisateurs (id_utilisateur, nom_utl, prenom_utl, email_utl, hash_utl, ae_utl) VALUES
                    (%s, %s, %s, %s, %s, %s)""", (self.id, self.last_name, self.first_name, self.email, "valid", "0"))
                    db.commit()
                except Exception as e:
                    with open(settings.BASE_DIR+"/user_fail.log", "a") as f:
                        print("FAIL to add user %s (%s %s - %s) to old site" % (self.id, self.first_name, self.last_name,
                            self.email), file=f)
                        print("Reason: %s" % (repr(e)), file=f)
                    db.rollback()
Skia's avatar
Skia committed
276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294

    def make_home(self):
        if self.home is None:
            home_root = SithFile.objects.filter(parent=None, name="users").first()
            if home_root is not None:
                home = SithFile(parent=home_root, name=self.username, owner=self)
                home.save()
                self.home = home
                self.save()

    def _change_username(self, new_name):
        u = User.objects.filter(username=new_name).first()
        if u is None:
            if self.home:
                self.home.name = new_name
                self.home.save()
        else:
            raise ValidationError(_("A user with that username already exists"))

Skia's avatar
Skia committed
295 296 297 298 299 300 301 302
    def get_profile(self):
        return {
            "last_name": self.last_name,
            "first_name": self.first_name,
            "nick_name": self.nick_name,
            "date_of_birth": self.date_of_birth,
        }

Skia's avatar
Skia committed
303 304 305 306 307 308 309 310 311 312 313
    def get_full_name(self):
        """
        Returns the first_name plus the last_name, with a space in between.
        """
        full_name = '%s %s' % (self.first_name, self.last_name)
        return full_name.strip()

    def get_short_name(self):
        "Returns the short name for the user."
        return self.first_name

Skia's avatar
Skia committed
314 315 316 317 318
    def get_display_name(self):
        """
        Returns the display name of the user.
        A nickname if possible, otherwise, the full name
        """
Skia's avatar
Skia committed
319 320
        if self.nick_name:
            return "%s (%s)" % (self.get_full_name(), self.nick_name)
Skia's avatar
Skia committed
321 322
        return self.get_full_name()

323 324 325 326
    def get_age(self):
        """
        Returns the age
        """
Sli's avatar
Sli committed
327 328 329
        today = timezone.now()
        born = self.date_of_birth
        return today.year - born.year - ((today.month, today.day) < (born.month, born.day))
330

Skia's avatar
Skia committed
331 332 333 334 335 336 337 338 339 340 341 342
    def email_user(self, subject, message, from_email=None, **kwargs):
        """
        Sends an email to this User.
        """
        send_mail(subject, message, from_email, [self.email], **kwargs)

    def generate_username(self):
        """
        Generates a unique username based on the first and last names.
        For example: Guy Carlier gives gcarlier, and gcarlier1 if the first one exists
        Returns the generated username
        """
Skia's avatar
Skia committed
343 344 345 346
        def remove_accents(data):
            return ''.join(x for x in unicodedata.normalize('NFKD', data) if \
            unicodedata.category(x)[0] == 'L').lower()
        user_name = remove_accents(self.first_name[0]+self.last_name).encode('ascii', 'ignore').decode('utf-8')
Skia's avatar
Skia committed
347 348 349 350 351 352 353 354
        un_set = [u.username for u in User.objects.all()]
        if user_name in un_set:
            i = 1
            while user_name+str(i) in un_set:
                i += 1
            user_name += str(i)
        self.username = user_name
        return user_name
Skia's avatar
Skia committed
355

Skia's avatar
Skia committed
356 357 358 359
    def is_owner(self, obj):
        """
        Determine if the object is owned by the user
        """
360 361
        if hasattr(obj, "is_owned_by") and obj.is_owned_by(self):
            return True
Skia's avatar
Skia committed
362
        if hasattr(obj, "owner_group") and self.is_in_group(obj.owner_group.name):
Skia's avatar
Skia committed
363
            return True
Skia's avatar
Skia committed
364 365
        if self.is_superuser or self.is_in_group(settings.SITH_GROUPS['root']['name']):
            return True
Skia's avatar
Skia committed
366 367 368 369 370 371 372 373
        return False

    def can_edit(self, obj):
        """
        Determine if the object can be edited by the user
        """
        if self.is_owner(obj):
            return True
374 375
        if hasattr(obj, "edit_groups"):
            for g in obj.edit_groups.all():
Skia's avatar
Skia committed
376
                if self.is_in_group(g.name):
377
                    return True
378 379
        if isinstance(obj, User) and obj == self:
            return True
380 381
        if hasattr(obj, "can_be_edited_by") and obj.can_be_edited_by(self):
            return True
Skia's avatar
Skia committed
382 383 384 385 386 387 388 389
        return False

    def can_view(self, obj):
        """
        Determine if the object can be viewed by the user
        """
        if self.can_edit(obj):
            return True
390 391
        if hasattr(obj, "view_groups"):
            for g in obj.view_groups.all():
Skia's avatar
Skia committed
392
                if self.is_in_group(g.name):
393
                    return True
394 395
        if hasattr(obj, "can_be_viewed_by") and obj.can_be_viewed_by(self):
            return True
Skia's avatar
Skia committed
396 397
        return False

Skia's avatar
Skia committed
398
    def can_be_edited_by(self, user):
Skia's avatar
Skia committed
399
        return user.is_in_group(settings.SITH_MAIN_BOARD_GROUP) or user.is_root
Skia's avatar
Skia committed
400

Skia's avatar
Skia committed
401 402 403
    def can_be_viewed_by(self, user):
        return (user.is_in_group(settings.SITH_MAIN_MEMBERS_GROUP) and self.is_subscriber_viewable) or user.is_root

404 405 406 407 408 409 410 411 412
    def get_mini_item(self):
        return """
    <div class="mini_profile_link" >
    <span>
    <img src="%s" alt="%s" />
    </span>
    <em>%s</em>
    </a>
    """ % (
413
            self.profile_pict.get_download_url() if self.profile_pict else staticfiles_storage.url("core/img/unknown.jpg"),
414
            _("Profile"),
415
            escape(self.get_display_name()),
416 417
            )

Skia's avatar
Skia committed
418 419 420
    @property
    def subscribed(self):
        return self.is_in_group(settings.SITH_MAIN_MEMBERS_GROUP)
Skia's avatar
Skia committed
421

422 423 424 425
class AnonymousUser(AuthAnonymousUser):
    def __init__(self, request):
        super(AnonymousUser, self).__init__()

Skia's avatar
Skia committed
426 427 428 429
    @property
    def subscribed(self):
        return False

Skia's avatar
Skia committed
430 431 432 433
    @property
    def is_root(self):
        return False

434 435 436 437 438 439 440 441
    @property
    def is_board_member(self):
        return False

    @property
    def is_launderette_manager(self):
        return False

442 443 444 445 446 447 448 449
    @property
    def is_banned_alcohol(self):
        return False

    @property
    def is_banned_conuter(self):
        return False

450 451 452 453 454 455 456 457
    def is_in_group(self, group_name):
        """
        The anonymous user is only the public group
        """
        if group_name == settings.SITH_GROUPS['public']['name']:
            return True
        return False

458 459 460 461 462 463 464
    def is_owner(self, obj):
        return False

    def can_edit(self, obj):
        return False

    def can_view(self, obj):
Skia's avatar
Skia committed
465 466 467
        if hasattr(obj, 'view_groups') and obj.view_groups.filter(pk=settings.SITH_GROUPS['public']['id']).exists():
            return True
        if hasattr(obj, 'can_be_viewed_by') and obj.can_be_viewed_by(self):
468 469 470
            return True
        return False

471 472 473
    def get_display_name(self):
        return _("Visitor")

474 475 476 477 478 479 480 481
class Preferences(models.Model):
    user = models.OneToOneField(User, related_name="preferences")
    show_my_stats = models.BooleanField(
        _('define if we show a users stats'),
        default=False,
        help_text=_('Show your account statistics to others'),
    )

Skia's avatar
Skia committed
482 483 484 485
def get_directory(instance, filename):
    return './{0}/{1}'.format(instance.get_parent_path(), filename)

class SithFile(models.Model):
Skia's avatar
Skia committed
486
    name = models.CharField(_('file name'), max_length=256, blank=False)
Skia's avatar
Skia committed
487 488 489 490 491 492 493 494 495 496 497 498 499 500
    parent = models.ForeignKey('self', related_name="children", verbose_name=_("parent"), null=True, blank=True)
    file = models.FileField(upload_to=get_directory, verbose_name=_("file"), null=True, blank=True)
    owner = models.ForeignKey(User, related_name="owned_files", verbose_name=_("owner"))
    edit_groups = models.ManyToManyField(Group, related_name="editable_files", verbose_name=_("edit group"), blank=True)
    view_groups = models.ManyToManyField(Group, related_name="viewable_files", verbose_name=_("view group"), blank=True)
    is_folder = models.BooleanField(_("is folder"), default=True)
    mime_type = models.CharField(_('mime type'), max_length=30)
    size = models.IntegerField(_("size"), default=0)
    date = models.DateTimeField(_('date'), auto_now=True)

    class Meta:
        verbose_name = _("file")

    def is_owned_by(self, user):
Skia's avatar
Skia committed
501 502
        if hasattr(self, 'profile_of') and user.is_in_group(settings.SITH_MAIN_BOARD_GROUP):
            return True
Skia's avatar
Skia committed
503 504
        return user.id == self.owner.id

505 506 507 508 509 510 511 512 513
    def can_be_viewed_by(self, user):
        if hasattr(self, 'profile_of'):
            return user.can_view(self.profile_of)
        if hasattr(self, 'avatar_of'):
            return user.can_view(self.avatar_of)
        if hasattr(self, 'scrub_of'):
            return user.can_view(self.scrub_of)
        return False

Skia's avatar
Skia committed
514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572
    def delete(self):
        for c in self.children.all():
            c.delete()
        self.file.delete()
        return super(SithFile, self).delete()

    def clean(self):
        """
        Cleans up the file
        """
        super(SithFile, self).clean()
        if '/' in self.name:
            raise ValidationError(_("Character '/' not authorized in name"))
        if self == self.parent:
            raise ValidationError(
                _('Loop in folder tree'),
                code='loop',
            )
        if (self == self.parent or (self.parent is not None and self in self.get_parent_list())):
            raise ValidationError(
                _('Loop in folder tree'),
                code='loop',
            )
        if self.parent and self.parent.is_file:
            raise ValidationError(_('You can not make a file be a children of a non folder file'))
        if ((self.parent is None and SithFile.objects.exclude(id=self.id).filter(parent=None, name=self.name).exists()) or
                (self.parent and self.parent.children.exclude(id=self.id).filter(name=self.name).exists())):
            raise ValidationError(
                _('Duplicate file'),
                code='duplicate',
            )
        if self.is_folder:
            try:
                self.file.delete()
            except: pass
            self.file = None
            self.mime_type = "inode/directory"
        if self.is_file and (self.file is None or self.file == ""):
            raise ValidationError(_("You must provide a file"))

    def save(self, *args, **kwargs):
        copy_rights = False
        if self.id is None:
            copy_rights = True
        super(SithFile, self).save(*args, **kwargs)
        if copy_rights:
            self.copy_rights()

    def copy_rights(self):
        """Copy, if possible, the rights of the parent folder"""
        if self.parent is not None:
            self.edit_groups = self.parent.edit_groups.all()
            self.view_groups = self.parent.view_groups.all()
            self.save()

    def __getattribute__(self, attr):
        if attr == "is_file":
            return not self.is_folder
        else:
Skia's avatar
Skia committed
573
            return super(SithFile, self).__getattribute__(attr)
Skia's avatar
Skia committed
574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594

    def __str__(self):
        if self.is_folder:
            return _("Folder: ") + self.name
        else:
            return _("File: ") + self.name

    def get_parent_list(self):
        l = []
        p = self.parent
        while p is not None:
            l.append(p)
            p = p.parent
        return l

    def get_parent_path(self):
        return '/'.join([p.name for p in self.get_parent_list()])

    def get_display_name(self):
        return self.name

595 596 597
    def get_download_url(self):
        return reverse('core:download', kwargs={'file_id': self.id})

Skia's avatar
Skia committed
598 599 600 601 602 603 604 605 606 607 608 609
class LockError(Exception):
    """There was a lock error on the object"""
    pass

class AlreadyLocked(LockError):
    """The object is already locked"""
    pass

class NotLocked(LockError):
    """The object is not locked"""
    pass

Skia's avatar
Skia committed
610
class Page(models.Model):
Skia's avatar
Skia committed
611 612 613 614 615 616 617
    """
    The page class to build a Wiki
    Each page may have a parent and it's URL is of the form my.site/page/<grd_pa>/<parent>/<mypage>
    It has an ID field, but don't use it, since it's only there for DB part, and because compound primary key is
    awkward!
    Prefere querying pages with Page.get_page_by_full_name()

618
    Be careful with the _full_name attribute: this field may not be valid until you call save(). It's made for fast
Skia's avatar
Skia committed
619 620
    query, but don't rely on it when playing with a Page object, use get_full_name() instead!
    """
621
    name = models.CharField(_('page name'), max_length=30, blank=False)
Skia's avatar
Skia committed
622
    parent = models.ForeignKey('self', related_name="children", verbose_name=_("parent"), null=True, blank=True, on_delete=models.SET_NULL)
Skia's avatar
Skia committed
623 624
    # Attention: this field may not be valid until you call save(). It's made for fast query, but don't rely on it when
    # playing with a Page object, use get_full_name() instead!
625
    _full_name = models.CharField(_('page name'), max_length=255, blank=True)
Skia's avatar
Skia committed
626
    owner_group = models.ForeignKey(Group, related_name="owned_page", verbose_name=_("owner group"),
Skia's avatar
Skia committed
627
                                    default=settings.SITH_GROUPS['root']['id'])
Skia's avatar
Skia committed
628 629
    edit_groups = models.ManyToManyField(Group, related_name="editable_page", verbose_name=_("edit group"), blank=True)
    view_groups = models.ManyToManyField(Group, related_name="viewable_page", verbose_name=_("view group"), blank=True)
Skia's avatar
Skia committed
630
    lock_mutex = {}
Skia's avatar
Skia committed
631

632
    class Meta:
633
        unique_together = ('name', 'parent')
634
        permissions = (
635 636
            ("change_prop_page", "Can change the page's properties (groups, ...)"),
            ("view_page", "Can view the page"),
637 638
        )

639 640
    @staticmethod
    def get_page_by_full_name(name):
Skia's avatar
Skia committed
641 642 643
        """
        Quicker to get a page with that method rather than building the request every time
        """
644
        return Page.objects.filter(_full_name=name).first()
645 646 647 648 649 650

    def __init__(self, *args, **kwargs):
        super(Page, self).__init__(*args, **kwargs)

    def clean(self):
        """
Skia's avatar
Skia committed
651
        Cleans up only the name for the moment, but this can be used to make any treatment before saving the object
652 653 654
        """
        if '/' in self.name:
            self.name = self.name.split('/')[-1]
655
        if Page.objects.exclude(pk=self.pk).filter(_full_name=self.get_full_name()).exists():
Skia's avatar
Skia committed
656 657 658 659
            raise ValidationError(
                _('Duplicate page'),
                code='duplicate',
            )
660
        super(Page, self).clean()
Skia's avatar
Skia committed
661 662 663 664 665 666 667 668 669 670 671 672 673 674
        if self.parent is not None and self in self.get_parent_list():
            raise ValidationError(
                _('Loop in page tree'),
                code='loop',
            )

    def get_parent_list(self):
        l = []
        p = self.parent
        while p is not None:
            l.append(p)
            p = p.parent
        return l

675
    def save(self, *args, **kwargs):
Skia's avatar
Skia committed
676 677 678 679 680
        """
        Performs some needed actions before and after saving a page in database
        """
        if not self.is_locked():
            raise NotLocked("The page is not locked and thus can not be saved")
681
        self.full_clean()
682
        # This reset the _full_name just before saving to maintain a coherent field quicker for queries than the
Skia's avatar
Skia committed
683
        # recursive method
Skia's avatar
Skia committed
684
        # It also update all the children to maintain correct names
685
        self._full_name = self.get_full_name()
Skia's avatar
Skia committed
686 687
        for c in self.children.all():
            c.save()
688
        super(Page, self).save(*args, **kwargs)
Skia's avatar
Skia committed
689 690 691 692 693 694 695 696 697 698 699
        self.unset_lock()

    def is_locked(self):
        """
        Is True if the page is locked, False otherwise
        This is where the timeout is handled, so a locked page for which the timeout is reach will be unlocked and this
        function will return False
        """
        if self.pk not in Page.lock_mutex.keys():
            # print("Page mutex does not exists")
            return False
Skia's avatar
Skia committed
700
        if (timezone.now()-Page.lock_mutex[self.pk]['time']) > timedelta(minutes=5):
Skia's avatar
Skia committed
701 702 703 704 705 706 707 708 709 710 711 712 713
            # print("Lock timed out")
            self.unset_lock()
            return False
        return True

    def set_lock(self, user):
        """
        Sets a lock on the current page or raise an AlreadyLocked exception
        """
        if self.is_locked() and self.get_lock()['user'] != user:
            raise AlreadyLocked("The page is already locked by someone else")
        Page.lock_mutex[self.pk] = {'user': user,
                                    'time': timezone.now()}
Skia's avatar
Skia committed
714
        # print("Locking page")
Skia's avatar
Skia committed
715 716 717 718 719 720 721 722 723 724 725 726

    def set_lock_recursive(self, user):
        """
        Locks recursively all the child pages for editing properties
        """
        for p in self.children.all():
            p.set_lock_recursive(user)
        self.set_lock(user)

    def unset_lock(self):
        """Always try to unlock, even if there is no lock"""
        Page.lock_mutex.pop(self.pk, None)
Skia's avatar
Skia committed
727
        # print("Unlocking page")
Skia's avatar
Skia committed
728 729 730 731 732 733 734 735

    def get_lock(self):
        """
        Returns the page's mutex containing the time and the user in a dict
        """
        if self.is_locked():
            return Page.lock_mutex[self.pk]
        raise NotLocked("The page is not locked and thus can not return its mutex")
736

737 738 739 740
    def get_absolute_url(self):
        """
        This is needed for black magic powered UpdateView's children
        """
741
        return reverse('core:page', kwargs={'page_name': self._full_name})
742

743
    def __str__(self):
744 745 746
        return self.get_full_name()

    def get_full_name(self):
Skia's avatar
Skia committed
747 748 749 750 751
        """
        Computes the real full_name of the page based on its name and its parent's name
        You can and must rely on this function when working on a page object that is not freshly fetched from the DB
        (For example when treating a Page object coming from a form)
        """
Skia's avatar
Skia committed
752 753 754
        if self.parent is None:
            return self.name
        return '/'.join([self.parent.get_full_name(), self.name])
Skia's avatar
Skia committed
755 756

    def get_display_name(self):
Skia's avatar
Skia committed
757 758 759 760
        try:
            return self.revisions.last().title
        except:
            return self.name
Skia's avatar
Skia committed
761

762
class PageRev(models.Model):
Skia's avatar
Skia committed
763 764 765 766 767 768 769
    """
    This is the true content of the page.
    Each page object has a revisions field that is a list of PageRev, ordered by date.
    my_page.revisions.last() gives the PageRev object that is the most up-to-date, and thus,
    is the real content of the page.
    The content is in PageRev.title and PageRev.content .
    """
Skia's avatar
Skia committed
770
    revision = models.IntegerField(_("revision"))
771 772 773 774 775 776 777 778 779 780 781 782 783
    title = models.CharField(_("page title"), max_length=255, blank=True)
    content = models.TextField(_("page content"), blank=True)
    date = models.DateTimeField(_('date'), auto_now=True)
    author = models.ForeignKey(User, related_name='page_rev')
    page = models.ForeignKey(Page, related_name='revisions')

    class Meta:
        ordering = ['date',]

    def get_absolute_url(self):
        """
        This is needed for black magic powered UpdateView's children
        """
784
        return reverse('core:page', kwargs={'page_name': self.page._full_name})
785 786 787 788

    def __str__(self):
        return str(self.__dict__)

789 790 791
    def __getattribute__(self, attr):
        if attr == "owner_group":
            return self.page.owner_group
792 793 794 795
        elif attr == "edit_groups":
            return self.page.edit_groups
        elif attr == "view_groups":
            return self.page.view_groups
Skia's avatar
Skia committed
796 797
        elif attr == "unset_lock":
            return self.page.unset_lock
798 799 800
        else:
            return object.__getattribute__(self, attr)

Skia's avatar
Skia committed
801
    def save(self, *args, **kwargs):
Skia's avatar
Skia committed
802 803
        if self.revision is None:
            self.revision = self.page.revisions.all().count() + 1
Skia's avatar
Skia committed
804 805 806
        super(PageRev, self).save(*args, **kwargs)
        # Don't forget to unlock, otherwise, people will have to wait for the page's timeout
        self.page.unset_lock()
807