from boards.models import Thread from django.db import models from django.db.models import Count __author__ = 'neko259' TAG_FONT_MULTIPLIER = 0.1 MAX_TAG_FONT = 10 OPENING_POST_POPULARITY_WEIGHT = 2 class TagManager(models.Manager): def get_not_empty_tags(self): tags = self.annotate(Count('threads')) \ .filter(threads__count__gt=0).order_by('name') return tags class Tag(models.Model): """ A tag is a text node assigned to the thread. The tag serves as a board section. There can be multiple tags for each thread """ objects = TagManager() class Meta: app_label = 'boards' name = models.CharField(max_length=100) threads = models.ManyToManyField(Thread, null=True, blank=True, related_name='tag+') linked = models.ForeignKey('Tag', null=True, blank=True) def __unicode__(self): return self.name def is_empty(self): return self.get_post_count() == 0 def get_post_count(self): return self.threads.count() # TODO Reenable this method after migration # def get_popularity(self): # posts_with_tag = Thread.objects.get_threads(tag=self) # reply_count = 0 # for post in posts_with_tag: # reply_count += post.get_reply_count() # reply_count += OPENING_POST_POPULARITY_WEIGHT # # return reply_count def get_linked_tags(self): tag_list = [] self.get_linked_tags_list(tag_list) return tag_list def get_linked_tags_list(self, tag_list=[]): """ Returns the list of tags linked to current. The list can be got through returned value or tag_list parameter """ linked_tag = self.linked if linked_tag and not (linked_tag in tag_list): tag_list.append(linked_tag) linked_tag.get_linked_tags_list(tag_list) def get_font_value(self): """Get tag font value to differ most popular tags in the list""" post_count = self.get_post_count() if post_count > MAX_TAG_FONT: post_count = MAX_TAG_FONT font_value = str(1 + (post_count - 1) * TAG_FONT_MULTIPLIER) return font_value