from datetime import datetime, timedelta, date from datetime import time as dtime from adjacent import Client import logging import re from django.core.cache import cache from django.core.urlresolvers import reverse from django.db import models, transaction from django.shortcuts import get_object_or_404 from django.template import RequestContext from django.template.loader import render_to_string from django.utils import timezone from markupfield.fields import MarkupField from boards import settings from boards.models import PostImage from boards.models.base import Viewable from boards.models.thread import Thread from boards.utils import datetime_to_epoch WS_CHANNEL_THREAD = "thread:" APP_LABEL_BOARDS = 'boards' CACHE_KEY_PPD = 'ppd' CACHE_KEY_POST_URL = 'post_url' POSTS_PER_DAY_RANGE = 7 BAN_REASON_AUTO = 'Auto' IMAGE_THUMB_SIZE = (200, 150) TITLE_MAX_LENGTH = 200 DEFAULT_MARKUP_TYPE = 'bbcode' # TODO This should be removed NO_IP = '0.0.0.0' # TODO Real user agent should be saved instead of this UNKNOWN_UA = '' REGEX_REPLY = re.compile(r'\[post\](\d+)\[/post\]') PARAMETER_TRUNCATED = 'truncated' PARAMETER_TAG = 'tag' PARAMETER_OFFSET = 'offset' PARAMETER_DIFF_TYPE = 'type' DIFF_TYPE_HTML = 'html' DIFF_TYPE_JSON = 'json' logger = logging.getLogger(__name__) class PostManager(models.Manager): def create_post(self, title, text, image=None, thread=None, ip=NO_IP, tags=None): """ Creates new post """ if not tags: tags = [] 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) logger.info('Created post #%d with title "%s"' % (post.id, post.title)) 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) list(map(thread.add_tag, tags)) if new_thread: Thread.objects.process_oldest_threads() self.connect_replies(post) 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() else: thread.last_edit_time = timezone.now() thread.save() post.delete() logger.info('Deleted post #%d (%s)' % (post_id, post.get_title())) def delete_posts_by_ip(self, ip): """ Deletes all posts of the author with same IP """ posts = self.filter(poster_ip=ip) for post in posts: self.delete_post(post) 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(update_fields=['refmap', 'last_edit_time']) referenced_thread = referenced_post.get_thread() referenced_thread.last_edit_time = post.pub_time referenced_thread.save(update_fields=['last_edit_time']) def get_posts_per_day(self): """ Gets average count of posts per day for the last 7 days """ day_end = date.today() day_start = day_end - timedelta(POSTS_PER_DAY_RANGE) cache_key = CACHE_KEY_PPD + str(day_end) ppd = cache.get(cache_key) if ppd: return ppd 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_period = float(self.filter( pub_time__lte=day_time_end, pub_time__gte=day_time_start).count()) ppd = posts_per_period / POSTS_PER_DAY_RANGE cache.set(cache_key, 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() 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): """ Builds a replies map string from replies list. This is a cache to stop the server from recalculating the map on every post show. """ 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(update_fields=['last_edit_time']) thread.last_edit_time = edit_time thread.save(update_fields=['last_edit_time']) @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(update_fields=['last_edit_time']) thread.last_edit_time = edit_time thread.save(update_fields=['last_edit_time']) 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() if is_opening: opening_post_id = self.id else: 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') def delete(self, using=None): """ Deletes all post images and the post itself. """ self.images.all().delete() super(Post, self).delete(using) def get_post_data(self, format_type=DIFF_TYPE_JSON, request=None, include_last_update=False): """ Gets post HTML or JSON data that can be rendered on a page or used by API. """ if format_type == DIFF_TYPE_HTML: context = RequestContext(request) context['post'] = self if PARAMETER_TRUNCATED in request.GET: context[PARAMETER_TRUNCATED] = True return render_to_string('boards/api_post.html', context) elif format_type == DIFF_TYPE_JSON: post_json = { 'id': self.id, 'title': self.title, 'text': self.text.rendered, } if self.images.exists(): post_image = self.get_first_image() post_json['image'] = post_image.image.url post_json['image_preview'] = post_image.image.url_200x150 if include_last_update: post_json['bump_time'] = datetime_to_epoch( self.thread_new.bump_time) return post_json def send_to_websocket(self, request, recursive=True): """ Sends post HTML data to the thread web socket. """ if not settings.WEBSOCKETS_ENABLED: return client = Client() channel_name = WS_CHANNEL_THREAD + str(self.get_thread().get_opening_post_id()) client.publish(channel_name, { 'html': self.get_post_data( format_type=DIFF_TYPE_HTML, request=request), 'diff_type': 'added' if recursive else 'updated', }) client.send() logger.info('Sent post #{} to channel {}'.format(self.id, channel_name)) if recursive: for reply_number in re.finditer(REGEX_REPLY, self.text.raw): post_id = reply_number.group(1) ref_post = Post.objects.filter(id=post_id)[0] ref_post.send_to_websocket(request, recursive=False)