from datetime import datetime, timedelta, date from datetime import time as dtime import logging import os from random import random import time import re import hashlib from django.core.cache import cache from django.core.urlresolvers import reverse from django.db import models, transaction from django.template.loader import render_to_string from django.utils import timezone from markupfield.fields import MarkupField from boards.models import PostImage from boards.models.base import Viewable from boards.models.thread import Thread from neboard import settings from boards import thumbs APP_LABEL_BOARDS = 'boards' CACHE_KEY_PPD = 'ppd' CACHE_KEY_POST_URL = 'post_url' POSTS_PER_DAY_RANGE = range(7) BAN_REASON_AUTO = 'Auto' IMAGE_THUMB_SIZE = (200, 150) TITLE_MAX_LENGTH = 200 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+)') logger = logging.getLogger(__name__) class PostManager(models.Manager): def create_post(self, title, text, image=None, thread=None, ip=NO_IP, tags=None, user=None): """ Creates new post """ posting_time = timezone.now() if not thread: thread = Thread.objects.create(bump_time=posting_time, last_edit_time=posting_time) new_thread = True else: thread.bump() thread.last_edit_time = posting_time thread.save() new_thread = False post = self.create(title=title, text=text, pub_time=posting_time, thread_new=thread, poster_ip=ip, poster_user_agent=UNKNOWN_UA, # TODO Get UA at # last! last_edit_time=posting_time, user=user) if image: post_image = PostImage.objects.create(image=image) post.images.add(post_image) logger.info('Created image #%d for post #%d' % (post_image.id, post.id)) thread.replies.add(post) 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(thread.add_tag, tags) if new_thread: self._delete_old_threads() self.connect_replies(post) logger.info('Created post #%d' % post.id) return post def delete_post(self, post): """ Deletes post and update or delete its thread """ post_id = post.id thread = post.get_thread() if post.is_opening(): thread.delete_with_posts() else: thread.last_edit_time = timezone.now() thread.save() post.delete() logger.info('Deleted post #%d' % post_id) def delete_posts_by_ip(self, ip): """ Deletes all posts of the author with same IP """ posts = self.filter(poster_ip=ip) map(self.delete_post, posts) # TODO Move this method to thread manager def _delete_old_threads(self): """ Preserves maximum thread count. If there are too many threads, archive the old ones. """ threads = Thread.objects.filter(archived=False).order_by('-bump_time') 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:] for thread in old_threads: thread.archived = True thread.last_edit_time = timezone.now() thread.save() logger.info('Archived %d old threads' % num_threads_to_delete) def connect_replies(self, post): """ Connects replies to a post to show them as a reflink map """ 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.build_refmap() referenced_post.save() referenced_thread = referenced_post.get_thread() referenced_thread.last_edit_time = post.pub_time referenced_thread.save() def get_posts_per_day(self): """ Gets average count of posts per day for the last 7 days """ today = date.today() ppd = cache.get(CACHE_KEY_PPD + str(today)) if ppd: return ppd posts_per_days = [] for i in POSTS_PER_DAY_RANGE: day_end = today - timedelta(i + 1) day_start = today - timedelta(i + 2) day_time_start = timezone.make_aware(datetime.combine( day_start, dtime()), timezone.get_current_timezone()) day_time_end = timezone.make_aware(datetime.combine( day_end, dtime()), timezone.get_current_timezone()) posts_per_days.append(float(self.filter( pub_time__lte=day_time_end, pub_time__gte=day_time_start).count())) ppd = (sum(posts_per_day for posts_per_day in posts_per_days) / len(posts_per_days)) cache.set(CACHE_KEY_PPD + str(today), ppd) return ppd class Post(models.Model, Viewable): """A post is a message.""" objects = PostManager() class Meta: app_label = APP_LABEL_BOARDS ordering = ('id',) title = models.CharField(max_length=TITLE_MAX_LENGTH) pub_time = models.DateTimeField() text = MarkupField(default_markup_type=DEFAULT_MARKUP_TYPE, escape_html=False) images = models.ManyToManyField(PostImage, null=True, blank=True, related_name='ip+', db_index=True) poster_ip = models.GenericIPAddressField() poster_user_agent = models.TextField() thread_new = models.ForeignKey('Thread', null=True, default=None, db_index=True) last_edit_time = models.DateTimeField() user = models.ForeignKey('User', null=True, default=None, db_index=True) referenced_posts = models.ManyToManyField('Post', symmetrical=False, null=True, blank=True, related_name='rfp+', db_index=True) refmap = models.TextField(null=True, blank=True) def __unicode__(self): return '#' + str(self.id) + ' ' + self.title + ' (' + \ self.text.raw[:50] + ')' def get_title(self): """ Gets original post title or part of its text. """ title = self.title if not title: title = self.text.rendered return title def build_refmap(self): map_string = '' first = True for refpost in self.referenced_posts.all(): if not first: map_string += ', ' map_string += '>>%s' % (refpost.get_url(), refpost.id) first = False self.refmap = map_string def get_sorted_referenced_posts(self): return self.refmap def is_referenced(self): return len(self.refmap) > 0 def is_opening(self): """ Checks if this is an opening post or just a reply. """ return self.get_thread().get_opening_post_id() == self.id @transaction.atomic def add_tag(self, tag): edit_time = timezone.now() thread = self.get_thread() thread.add_tag(tag) self.last_edit_time = edit_time self.save() thread.last_edit_time = edit_time thread.save() @transaction.atomic def remove_tag(self, tag): edit_time = timezone.now() thread = self.get_thread() thread.remove_tag(tag) self.last_edit_time = edit_time self.save() thread.last_edit_time = edit_time thread.save() def get_url(self, thread=None): """ Gets full url to the post. """ cache_key = CACHE_KEY_POST_URL + str(self.id) link = cache.get(cache_key) if not link: if not thread: thread = self.get_thread() opening_id = thread.get_opening_post_id() if self.id != opening_id: link = reverse('thread', kwargs={ 'post_id': opening_id}) + '#' + str(self.id) else: link = reverse('thread', kwargs={'post_id': self.id}) cache.set(cache_key, link) return link def get_thread(self): """ Gets post's thread. """ return self.thread_new def get_referenced_posts(self): return self.referenced_posts.only('id', 'thread_new') def get_text(self): return self.text def get_view(self, moderator=False, need_open_link=False, truncated=False, *args, **kwargs): if 'is_opening' in kwargs: is_opening = kwargs['is_opening'] else: is_opening = self.is_opening() if 'thread' in kwargs: thread = kwargs['thread'] else: thread = self.get_thread() if 'can_bump' in kwargs: can_bump = kwargs['can_bump'] else: can_bump = thread.can_bump() opening_post_id = thread.get_opening_post_id() return render_to_string('boards/post.html', { 'post': self, 'moderator': moderator, 'is_opening': is_opening, 'thread': thread, 'bumpable': can_bump, 'need_open_link': need_open_link, 'truncated': truncated, 'opening_post_id': opening_post_id, }) def get_first_image(self): return self.images.earliest('id')