import os from random import random import time import math from django.db import models from django.db.models import Count from django.http import Http404 from django.utils import timezone from markupfield.fields import MarkupField from neboard import settings import thumbs IMAGE_THUMB_SIZE = (200, 150) TITLE_MAX_LENGTH = 50 DEFAULT_MARKUP_TYPE = 'markdown' NO_PARENT = -1 NO_IP = '0.0.0.0' UNKNOWN_UA = '' ALL_PAGES = -1 OPENING_POST_POPULARITY_WEIGHT = 2 IMAGES_DIRECTORY = 'images/' FILE_EXTENSION_DELIMITER = '.' RANK_ADMIN = 0 RANK_MODERATOR = 10 RANK_USER = 100 \ SETTING_MODERATE = "moderate" class PostManager(models.Manager): def create_post(self, title, text, image=None, thread=None, ip=NO_IP, tags=None, user=None): post = self.create(title=title, text=text, pub_time=timezone.now(), thread=thread, image=image, poster_ip=ip, poster_user_agent=UNKNOWN_UA, last_edit_time=timezone.now(), bump_time=timezone.now(), user=user) if tags: map(post.tags.add, tags) for tag in tags: tag.threads.add(post) if thread: thread.replies.add(post) thread.bump() thread.last_edit_time = timezone.now() thread.save() else: self._delete_old_threads() return post def delete_post(self, post): if post.replies.count() > 0: map(self.delete_post, post.replies.all()) # Update thread's last edit time (used as cache key) thread = post.thread if thread: thread.last_edit_time = timezone.now() thread.save() post.delete() def delete_posts_by_ip(self, ip): posts = self.filter(poster_ip=ip) map(self.delete_post, posts) def get_threads(self, tag=None, page=ALL_PAGES, order_by='-bump_time'): if tag: threads = tag.threads if threads.count() == 0: raise Http404 else: threads = self.filter(thread=None) threads = threads.order_by(order_by) if page != ALL_PAGES: thread_count = threads.count() if page < self.get_thread_page_count(tag=tag): start_thread = page * settings.THREADS_PER_PAGE end_thread = min(start_thread + settings.THREADS_PER_PAGE, thread_count) threads = threads[start_thread:end_thread] return threads def get_thread(self, opening_post_id): try: opening_post = self.get(id=opening_post_id, thread=None) except Post.DoesNotExist: raise Http404 if opening_post.replies: thread = [opening_post] thread.extend(opening_post.replies.all()) return thread def exists(self, post_id): posts = self.filter(id=post_id) return posts.count() > 0 def get_thread_page_count(self, tag=None): if tag: threads = self.filter(thread=None, tags=tag) else: threads = self.filter(thread=None) return int(math.ceil(threads.count() / float( settings.THREADS_PER_PAGE))) def _delete_old_threads(self): """ Preserves maximum thread count. If there are too many threads, delete the old ones. """ # TODO Move old threads to the archive instead of deleting them. # Maybe make some 'old' field in the model to indicate the thread # must not be shown and be able for replying. threads = self.get_threads() thread_count = len(threads) if thread_count > settings.MAX_THREAD_COUNT: num_threads_to_delete = thread_count - settings.MAX_THREAD_COUNT old_threads = threads[thread_count - num_threads_to_delete:] map(self.delete_post, old_threads) 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 post. The tag serves as a board section. There can be multiple tags for each message """ objects = TagManager() name = models.CharField(max_length=100) threads = models.ManyToManyField('Post', null=True, blank=True, related_name='tag+') 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() def get_popularity(self): posts_with_tag = Post.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 class Post(models.Model): """A post is a message.""" objects = PostManager() def _update_image_filename(self, filename): """Get unique image filename""" path = IMAGES_DIRECTORY new_name = str(int(time.mktime(time.gmtime()))) new_name += str(int(random() * 1000)) new_name += FILE_EXTENSION_DELIMITER new_name += filename.split(FILE_EXTENSION_DELIMITER)[-1:][0] return os.path.join(path, new_name) title = models.CharField(max_length=TITLE_MAX_LENGTH) pub_time = models.DateTimeField() text = MarkupField(default_markup_type=DEFAULT_MARKUP_TYPE, escape_html=False) image_width = models.IntegerField(default=0) image_height = models.IntegerField(default=0) image = thumbs.ImageWithThumbsField(upload_to=_update_image_filename, blank=True, sizes=(IMAGE_THUMB_SIZE,), width_field='image_width', height_field='image_height') poster_ip = models.GenericIPAddressField() poster_user_agent = models.TextField() thread = models.ForeignKey('Post', null=True, default=None) tags = models.ManyToManyField(Tag) last_edit_time = models.DateTimeField() bump_time = models.DateTimeField() user = models.ForeignKey('User', null=True, default=None) replies = models.ManyToManyField('Post', symmetrical=False, null=True, blank=True, related_name='re+') def __unicode__(self): return '#' + str(self.id) + ' ' + self.title + ' (' + \ self.text.raw[:50] + ')' def get_title(self): title = self.title if len(title) == 0: title = self.text.raw[:20] return title def get_reply_count(self): return self.replies.count() def get_images_count(self): images_count = 1 if self.image else 0 images_count += self.replies.filter(image_width__gt=0).count() return images_count def can_bump(self): """Check if the thread can be bumped by replying""" post_count = self.get_reply_count() + 1 return post_count <= settings.MAX_POSTS_PER_THREAD def bump(self): """Bump (move to up) thread""" if self.can_bump(): self.bump_time = timezone.now() def get_last_replies(self): if settings.LAST_REPLIES_COUNT > 0: reply_count = self.get_reply_count() if reply_count > 0: reply_count_to_show = min(settings.LAST_REPLIES_COUNT, reply_count) last_replies = self.replies.all()[reply_count - reply_count_to_show:] return last_replies class User(models.Model): user_id = models.CharField(max_length=50) rank = models.IntegerField() registration_time = models.DateTimeField() fav_tags = models.ManyToManyField(Tag, null=True, blank=True) fav_threads = models.ManyToManyField(Post, related_name='+', null=True, blank=True) def save_setting(self, name, value): setting, created = Setting.objects.get_or_create(name=name, user=self) setting.value = str(value) setting.save() return setting def get_setting(self, name): if Setting.objects.filter(name=name, user=self).exists(): setting = Setting.objects.get(name=name, user=self) setting_value = setting.value else: setting_value = None return setting_value def is_moderator(self): return RANK_MODERATOR >= self.rank def get_sorted_fav_tags(self): tags = self.fav_tags.annotate(Count('threads'))\ .filter(threads__count__gt=0).order_by('name') return tags def get_post_count(self): return Post.objects.filter(user=self).count() def __unicode__(self): return self.user_id + '(' + str(self.rank) + ')' def get_last_access_time(self): posts = Post.objects.filter(user=self) if posts.count() > 0: return posts.latest('pub_time').pub_time class Setting(models.Model): name = models.CharField(max_length=50) value = models.CharField(max_length=50) user = models.ForeignKey(User) class Ban(models.Model): ip = models.GenericIPAddressField() def __unicode__(self): return self.ip