django1/django/contrib/comments/models/comments.py

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from django.core import meta
from django.models import auth, core
class Comment(meta.Model):
db_table = 'comments'
fields = (
meta.ForeignKey(auth.User, raw_id_admin=True),
meta.ForeignKey(core.ContentType, name='content_type_id', rel_name='content_type'),
meta.IntegerField('object_id', 'object ID'),
meta.CharField('headline', 'headline', maxlength=255, blank=True),
meta.TextField('comment', 'comment', maxlength=3000),
meta.PositiveSmallIntegerField('rating1', 'rating #1', blank=True, null=True),
meta.PositiveSmallIntegerField('rating2', 'rating #2', blank=True, null=True),
meta.PositiveSmallIntegerField('rating3', 'rating #3', blank=True, null=True),
meta.PositiveSmallIntegerField('rating4', 'rating #4', blank=True, null=True),
meta.PositiveSmallIntegerField('rating5', 'rating #5', blank=True, null=True),
meta.PositiveSmallIntegerField('rating6', 'rating #6', blank=True, null=True),
meta.PositiveSmallIntegerField('rating7', 'rating #7', blank=True, null=True),
meta.PositiveSmallIntegerField('rating8', 'rating #8', blank=True, null=True),
# This field designates whether to use this row's ratings in
# aggregate functions (summaries). We need this because people are
# allowed to post multiple review on the same thing, but the system
# will only use the latest one (with valid_rating=True) in tallying
# the reviews.
meta.BooleanField('valid_rating', 'is valid rating'),
meta.DateTimeField('submit_date', 'date/time submitted', auto_now_add=True),
meta.BooleanField('is_public', 'is public'),
meta.IPAddressField('ip_address', 'IP address', blank=True, null=True),
meta.BooleanField('is_removed', 'is removed',
help_text='Check this box if the comment is inappropriate. A "This comment has been removed" message will be displayed instead.'),
meta.ForeignKey(core.Site),
)
module_constants = {
# used as shared secret between comment form and comment-posting script
'COMMENT_SALT': 'ijw2f3_MRS_PIGGY_LOVES_KERMIT_avo#*5vv0(23j)(*',
# min. and max. allowed dimensions for photo resizing (in pixels)
'MIN_PHOTO_DIMENSION': 5,
'MAX_PHOTO_DIMENSION': 1000,
# option codes for comment-form hidden fields
'PHOTOS_REQUIRED': 'pr',
'PHOTOS_OPTIONAL': 'pa',
'RATINGS_REQUIRED': 'rr',
'RATINGS_OPTIONAL': 'ra',
'IS_PUBLIC': 'ip',
}
ordering = (('submit_date', 'DESC'),)
admin = meta.Admin(
fields = (
(None, {'fields': ('content_type_id', 'object_id', 'site_id')}),
('Content', {'fields': ('user_id', 'headline', 'comment')}),
('Ratings', {'fields': ('rating1', 'rating2', 'rating3', 'rating4', 'rating5', 'rating6', 'rating7', 'rating8', 'valid_rating')}),
('Meta', {'fields': ('is_public', 'is_removed', 'ip_address')}),
),
list_display = ('user_id', 'submit_date', 'content_type_id', 'get_content_object'),
list_filter = ('submit_date',),
date_hierarchy = 'submit_date',
search_fields = ('comment', 'user__username'),
)
def __repr__(self):
return "%s: %s..." % (self.get_user().username, self.comment[:100])
def get_absolute_url(self):
return self.get_content_object().get_absolute_url() + "#c" + str(self.id)
def get_crossdomain_url(self):
return "/r/%d/%d/" % (self.content_type_id, self.object_id)
def get_flag_url(self):
return "/comments/flag/%s/" % self.id
def get_deletion_url(self):
return "/comments/delete/%s/" % self.id
def get_content_object(self):
"""
Returns the object that this comment is a comment on. Returns None if
the object no longer exists.
"""
from django.core.exceptions import ObjectDoesNotExist
try:
return self.get_content_type().get_object_for_this_type(id__exact=self.object_id)
except ObjectDoesNotExist:
return None
get_content_object.short_description = 'Content object'
def _fill_karma_cache(self):
"Helper function that populates good/bad karma caches"
good, bad = 0, 0
for k in self.get_karmascore_list():
if k.score == -1:
bad +=1
elif k.score == 1:
good +=1
self._karma_total_good, self._karma_total_bad = good, bad
def get_good_karma_total(self):
if not hasattr(self, "_karma_total_good"):
self._fill_karma_cache()
return self._karma_total_good
def get_bad_karma_total(self):
if not hasattr(self, "_karma_total_bad"):
self._fill_karma_cache()
return self._karma_total_bad
def get_karma_total(self):
if not hasattr(self, "_karma_total_good") or not hasattr(self, "_karma_total_bad"):
self._fill_karma_cache()
return self._karma_total_good + self._karma_total_bad
def get_as_text(self):
return 'Posted by %s at %s\n\n%s\n\nhttp://%s%s' % \
(self.get_user().username, self.submit_date,
self.comment, self.get_site().domain, self.get_absolute_url())
def _module_get_security_hash(options, photo_options, rating_options, target):
"""
Returns the MD5 hash of the given options (a comma-separated string such as
'pa,ra') and target (something like 'lcom.eventtimes:5157'). Used to
validate that submitted form options have not been tampered-with.
"""
import md5
return md5.new(options + photo_options + rating_options + target + COMMENT_SALT).hexdigest()
def _module_get_rating_options(rating_string):
"""
Given a rating_string, this returns a tuple of (rating_range, options).
>>> s = "scale:1-10|First_category|Second_category"
>>> get_rating_options(s)
([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], ['First category', 'Second category'])
"""
rating_range, options = rating_string.split('|', 1)
rating_range = range(int(rating_range[6:].split('-')[0]), int(rating_range[6:].split('-')[1])+1)
choices = [c.replace('_', ' ') for c in options.split('|')]
return rating_range, choices
def _module_get_list_with_karma(**kwargs):
"""
Returns a list of Comment objects matching the given lookup terms, with
_karma_total_good and _karma_total_bad filled.
"""
kwargs.setdefault('select', {})
kwargs['select']['_karma_total_good'] = 'SELECT COUNT(*) FROM comments_karma WHERE comments_karma.comment_id=comments.id AND score=1'
kwargs['select']['_karma_total_bad'] = 'SELECT COUNT(*) FROM comments_karma WHERE comments_karma.comment_id=comments.id AND score=-1'
return get_list(**kwargs)
def _module_user_is_moderator(user):
from django.conf.settings import COMMENTS_MODERATORS_GROUP
if user.is_superuser:
return True
for g in user.get_group_list():
if g.id == COMMENTS_MODERATORS_GROUP:
return True
return False
class FreeComment(meta.Model):
"A FreeComment is a comment by a non-registered user"
db_table = 'comments_free'
fields = (
meta.ForeignKey(core.ContentType, name='content_type_id', rel_name='content_type'),
meta.IntegerField('object_id', 'object ID'),
meta.TextField('comment', 'comment', maxlength=3000),
meta.CharField('person_name', "person's name", maxlength=50),
meta.DateTimeField('submit_date', 'date/time submitted', auto_now_add=True),
meta.BooleanField('is_public', 'is public'),
meta.IPAddressField('ip_address', 'IP address'),
# TODO: Change this to is_removed, like Comment
meta.BooleanField('approved', 'approved by staff'),
meta.ForeignKey(core.Site),
)
ordering = (('submit_date', 'DESC'),)
admin = meta.Admin(
fields = (
(None, {'fields': ('content_type_id', 'object_id', 'site_id')}),
('Content', {'fields': ('person_name', 'comment')}),
('Meta', {'fields': ('submit_date', 'is_public', 'ip_address', 'approved')}),
),
list_display = ('person_name', 'submit_date', 'content_type_id', 'get_content_object'),
list_filter = ('submit_date',),
date_hierarchy = 'submit_date',
search_fields = ('comment', 'person_name'),
)
def __repr__(self):
return "%s: %s..." % (self.person_name, self.comment[:100])
def get_content_object(self):
"""
Returns the object that this comment is a comment on. Returns None if
the object no longer exists.
"""
from django.core.exceptions import ObjectDoesNotExist
try:
return self.get_content_type().get_object_for_this_type(id__exact=self.object_id)
except ObjectDoesNotExist:
return None
get_content_object.short_description = 'Content object'
class KarmaScore(meta.Model):
module_name = 'karma'
fields = (
meta.ForeignKey(auth.User),
meta.ForeignKey(Comment),
meta.SmallIntegerField('score', 'score', db_index=True),
meta.DateTimeField('scored_date', 'date scored', auto_now=True),
)
unique_together = (('user_id', 'comment_id'),)
module_constants = {
# what users get if they don't have any karma
'DEFAULT_KARMA': 5,
'KARMA_NEEDED_BEFORE_DISPLAYED': 3,
}
def __repr__(self):
return "%d rating by %s" % (self.score, self.get_user())
def _module_vote(user_id, comment_id, score):
try:
karma = get_object(comment_id__exact=comment_id, user_id__exact=user_id)
except KarmaScoreDoesNotExist:
karma = KarmaScore(None, user_id, comment_id, score, datetime.datetime.now())
karma.save()
else:
karma.score = score
karma.scored_date = datetime.datetime.now()
karma.save()
def _module_get_pretty_score(score):
"""
Given a score between -1 and 1 (inclusive), returns the same score on a
scale between 1 and 10 (inclusive), as an integer.
"""
if score is None:
return DEFAULT_KARMA
return int(round((4.5 * score) + 5.5))
class UserFlag(meta.Model):
db_table = 'comments_user_flags'
fields = (
meta.ForeignKey(auth.User),
meta.ForeignKey(Comment),
meta.DateTimeField('flag_date', 'date flagged', auto_now_add=True),
)
unique_together = (('user_id', 'comment_id'),)
def __repr__(self):
return "Flag by %r" % self.get_user()
def _module_flag(comment, user):
"""
Flags the given comment by the given user. If the comment has already
been flagged by the user, or it was a comment posted by the user,
nothing happens.
"""
if int(comment.user_id) == int(user.id):
return # A user can't flag his own comment. Fail silently.
try:
f = get_object(user_id__exact=user.id, comment_id__exact=comment.id)
except UserFlagDoesNotExist:
from django.core.mail import mail_managers
f = UserFlag(None, user.id, comment.id, None)
message = 'This comment was flagged by %s:\n\n%s' % (user.username, comment.get_as_text())
mail_managers('Comment flagged', message, fail_silently=True)
f.save()
class ModeratorDeletion(meta.Model):
db_table = 'comments_moderator_deletions'
fields = (
meta.ForeignKey(auth.User, verbose_name='moderator'),
meta.ForeignKey(Comment),
meta.DateTimeField('deletion_date', 'date deleted', auto_now_add=True),
)
unique_together = (('user_id', 'comment_id'),)
def __repr__(self):
return "Moderator deletion by %r" % self.get_user()