import os from random import random import re import time import math from django.db import models 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 = '.' REGEX_PRETTY = re.compile(r'^\d(0)+$') REGEX_SAME = re.compile(r'^(.)\1+$') class PostManager(models.Manager): def create_post(self, title, text, image=None, parent_id=NO_PARENT, ip=NO_IP, tags=None): post = self.create(title=title, text=text, pub_time=timezone.now(), parent=parent_id, image=image, poster_ip=ip, poster_user_agent=UNKNOWN_UA, last_edit_time=timezone.now()) if tags: map(post.tags.add, tags) if parent_id != NO_PARENT: self._bump_thread(parent_id) else: self._delete_old_threads() return post def delete_post(self, post): children = self.filter(parent=post.id) for child in children: self.delete_post(child) post.delete() def delete_posts_by_ip(self, ip): posts = self.filter(poster_ip=ip) for post in posts: self.delete_post(post) def get_threads(self, tag=None, page=ALL_PAGES, order_by='-last_edit_time'): if tag: threads = self.filter(parent=NO_PARENT, tags=tag) # TODO Throw error 404 if no threads for tag found? else: threads = self.filter(parent=NO_PARENT) threads = threads.order_by(order_by) if page != ALL_PAGES: thread_count = len(threads) 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, parent=NO_PARENT) except Post.DoesNotExist: raise Http404 if opening_post.parent == NO_PARENT: replies = self.filter(parent=opening_post_id) thread = [opening_post] thread.extend(replies) 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(parent=NO_PARENT, tags=tag) else: threads = self.filter(parent=NO_PARENT) 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:] for thread in old_threads: self.delete_post(thread) def _bump_thread(self, thread_id): thread = self.get(id=thread_id) if thread.can_bump(): thread.last_edit_time = timezone.now() thread.save() class TagManager(models.Manager): def get_not_empty_tags(self): all_tags = self.all().order_by('name') tags = [] for tag in all_tags: if not tag.is_empty(): tags.append(tag) return tags def get_popular_tags(self): all_tags = self.get_not_empty_tags() sorted_tags = sorted(all_tags, key=lambda tag: tag.get_popularity(), reverse=True) return sorted_tags[:settings.POPULAR_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) # TODO Connect the tag to its posts to check the number of threads for # the tag. def __unicode__(self): return self.name def is_empty(self): return self.get_post_count() == 0 def get_post_count(self): posts_with_tag = Post.objects.get_threads(tag=self) return posts_with_tag.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=True) image = thumbs.ImageWithThumbsField(upload_to=_update_image_filename, blank=True, sizes=(IMAGE_THUMB_SIZE,)) poster_ip = models.IPAddressField() poster_user_agent = models.TextField() parent = models.BigIntegerField() tags = models.ManyToManyField(Tag) last_edit_time = models.DateTimeField() def __unicode__(self): return '#' + str(self.id) + ' ' + self.title + ' (' + self.text.raw + \ ')' def _get_replies(self): return Post.objects.filter(parent=self.id) def get_reply_count(self): return self._get_replies().count() def get_images_count(self): images_count = 1 if self.image else 0 for reply in self._get_replies(): if reply.image: images_count += 1 return images_count def get_gets_count(self): gets_count = 1 if self.is_get() else 0 for reply in self._get_replies(): if reply.is_get(): gets_count += 1 return gets_count def is_get(self): """If the post has pretty id (1, 1000, 77777), than it is called GET""" first = self.id == 1 id_str = str(self.id) pretty = REGEX_PRETTY.match(id_str) same_digits = REGEX_SAME.match(id_str) return first or pretty or same_digits def can_bump(self): """Check if the thread can be bumped by replying""" replies_count = len(Post.objects.get_thread(self.id)) return replies_count <= settings.MAX_POSTS_PER_THREAD 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._get_replies()[reply_count - reply_count_to_show:] return last_replies class Admin(models.Model): """ Model for admin users """ name = models.CharField(max_length=100) password = models.CharField(max_length=100) def __unicode__(self): return self.name + '/' + '*' * len(self.password)