import os from random import random import time import math import re from django.core.cache import cache from django.db import models from django.http import Http404 from django.utils import timezone from markupfield.fields import MarkupField from neboard import settings from boards import settings as boards_settings from boards import thumbs BAN_REASON_AUTO = 'Auto' 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 IMAGES_DIRECTORY = 'images/' FILE_EXTENSION_DELIMITER = '.' SETTING_MODERATE = "moderate" REGEX_REPLY = re.compile('>>(\d+)') class PostManager(models.Manager): def create_post(self, title, text, image=None, thread=None, ip=NO_IP, tags=None, user=None): posting_time = timezone.now() post = self.create(title=title, text=text, pub_time=posting_time, thread=thread, image=image, poster_ip=ip, poster_user_agent=UNKNOWN_UA, last_edit_time=posting_time, bump_time=posting_time, user=user) if tags: linked_tags = [] for tag in tags: tag_linked_tags = tag.get_linked_tags() if len(tag_linked_tags) > 0: linked_tags.extend(tag_linked_tags) tags.extend(linked_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 = posting_time thread.save() else: self._delete_old_threads() self.connect_replies(post) 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.clear_cache() thread.last_edit_time = timezone.now() thread.save() post.clear_cache() 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_page_count(thread_count): 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 cache_key = opening_post.get_cache_key() thread = cache.get(cache_key) if thread: return thread if opening_post.replies: thread = [opening_post] thread.extend(opening_post.replies.all().order_by('pub_time')) cache.set(cache_key, thread, boards_settings.CACHE_TIMEOUT) 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 self._get_page_count(threads.count()) 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 = threads.count() 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) def connect_replies(self, post): """Connect replies to a post to show them as a refmap""" for reply_number in re.finditer(REGEX_REPLY, post.text.raw): post_id = reply_number.group(1) ref_post = self.filter(id=post_id) if ref_post.count() > 0: referenced_post = ref_post[0] referenced_post.referenced_posts.add(post) referenced_post.last_edit_time = post.pub_time referenced_post.save() def _get_page_count(self, thread_count): return int(math.ceil(thread_count / float(settings.THREADS_PER_PAGE))) class Post(models.Model): """A post is a message.""" objects = PostManager() class Meta: app_label = 'boards' 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+') referenced_posts = models.ManyToManyField('Post', symmetrical=False, null=True, blank=True, related_name='rfp+') 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() return post_count <= settings.MAX_POSTS_PER_THREAD def clear_cache(self): """Remove the post from cache""" cache_key = self.get_cache_key() cache.delete(cache_key) def bump(self): """Bump (move to up) thread""" if self.can_bump(): self.bump_time = timezone.now() self.clear_cache() 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().order_by('pub_time')[ reply_count - reply_count_to_show:] return last_replies def get_tags(self): """Get a sorted tag list""" return self.tags.order_by('name') def get_cache_key(self): return 'thread_cache' + str(self.id) def get_sorted_referenced_posts(self): return self.referenced_posts.order_by('id') def is_referenced(self): return self.referenced_posts.count() > 0