from datetime import datetime, timedelta, date from datetime import time as dtime import logging import re from adjacent import Client from django.core.cache import cache from django.core.urlresolvers import reverse from django.db import models, transaction from django.db.models import TextField from django.template.loader import render_to_string from django.utils import timezone from boards import settings from boards.mdx_neboard import bbcode_extended 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_NOTIFICATION_TYPE_NEW_POST = 'new_post' WS_NOTIFICATION_TYPE = 'notification_type' 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 # 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' PARAMETER_BUMPABLE = 'bumpable' PARAMETER_THREAD = 'thread' PARAMETER_IS_OPENING = 'is_opening' PARAMETER_MODERATOR = 'moderator' PARAMETER_POST = 'post' PARAMETER_OP_ID = 'opening_post_id' PARAMETER_NEED_OPEN_LINK = 'need_open_link' DIFF_TYPE_HTML = 'html' DIFF_TYPE_JSON = 'json' PREPARSE_PATTERNS = { r'>>(\d+)': r'[post]\1[/post]', # Reflink ">>123" r'^>([^>].+)': r'[quote]\1[/quote]', # Quote ">text" r'^//(.+)': r'[comment]\1[/comment]', # Comment "//text" } class PostManager(models.Manager): @transaction.atomic def create_post(self, title: str, text: str, image=None, thread=None, ip=NO_IP, tags: list=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: new_thread = False pre_text = self._preparse_text(text) post = self.create(title=title, text=pre_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 = logging.getLogger('boards.post.create') logger.info('Created post {} by {}'.format( post, post.poster_ip)) if image: # Try to find existing image. If it exists, assign it to the post # instead of createing the new one image_hash = PostImage.get_hash(image) existing = PostImage.objects.filter(hash=image_hash) if len(existing) > 0: post_image = existing[0] else: post_image = PostImage.objects.create(image=image) logger.info('Created new image #{} for post #{}'.format( post_image.id, post.id)) post.images.add(post_image) thread.replies.add(post) list(map(thread.add_tag, tags)) if new_thread: Thread.objects.process_oldest_threads() else: thread.bump() thread.last_edit_time = posting_time thread.save() self.connect_replies(post) return post 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: post.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.get_raw_text()): 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 def _preparse_text(self, text): """ Preparses text to change patterns like '>>' to a proper bbcode tags. """ for key, value in PREPARSE_PATTERNS.items(): text = re.sub(key, value, text, flags=re.MULTILINE) return text 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 = TextField(blank=True, null=True) _text_rendered = TextField(blank=True, null=True, editable=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 __str__(self): return 'P#{}/{}'.format(self.id, self.title) def get_title(self) -> str: """ Gets original post title or part of its text. """ title = self.title if not title: title = self.get_text() return title def build_refmap(self) -> None: """ 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) -> bool: if not self.refmap: return False else: return len(self.refmap) > 0 def is_opening(self) -> bool: """ 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']) 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) -> Thread: """ Gets post's thread. """ return self.thread_new def get_referenced_posts(self): return self.referenced_posts.only('id', 'thread_new') def get_view(self, moderator=False, need_open_link=False, truncated=False, *args, **kwargs): """ Renders post's HTML view. Some of the post params can be passed over kwargs for the means of caching (if we view the thread, some params are same for every post and don't need to be computed over and over. """ is_opening = kwargs.get(PARAMETER_IS_OPENING, self.is_opening()) thread = kwargs.get(PARAMETER_THREAD, self.get_thread()) can_bump = kwargs.get(PARAMETER_BUMPABLE, 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', { PARAMETER_POST: self, PARAMETER_MODERATOR: moderator, PARAMETER_IS_OPENING: is_opening, PARAMETER_THREAD: thread, PARAMETER_BUMPABLE: can_bump, PARAMETER_NEED_OPEN_LINK: need_open_link, PARAMETER_TRUNCATED: truncated, PARAMETER_OP_ID: opening_post_id, }) def get_search_view(self, *args, **kwargs): return self.get_view(args, kwargs) def get_first_image(self) -> PostImage: return self.images.earliest('id') def delete(self, using=None): """ Deletes all post images and the post itself. If the post is opening, thread with all posts is deleted. """ for image in self.images.all(): image_refs_count = Post.objects.filter(images__in=[image]).count() if image_refs_count == 1: image.delete() if self.is_opening(): self.get_thread().delete() else: thread = self.get_thread() thread.last_edit_time = timezone.now() thread.save() super(Post, self).delete(using) logging.getLogger('boards.post.delete').info( 'Deleted post {}'.format(self)) 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: params = dict() params['post'] = self if PARAMETER_TRUNCATED in request.GET: params[PARAMETER_TRUNCATED] = True return render_to_string('boards/api_post.html', params) 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() thread = self.get_thread() thread_id = thread.id channel_name = WS_CHANNEL_THREAD + str(thread.get_opening_post_id()) client.publish(channel_name, { WS_NOTIFICATION_TYPE: WS_NOTIFICATION_TYPE_NEW_POST, }) client.send() logger = logging.getLogger('boards.post.websocket') logger.info('Sent notification from post #{} to channel {}'.format( self.id, channel_name)) if recursive: for reply_number in re.finditer(REGEX_REPLY, self.get_raw_text()): post_id = reply_number.group(1) ref_post = Post.objects.filter(id=post_id)[0] # If post is in this thread, its thread was already notified. # Otherwise, notify its thread separately. if ref_post.thread_new_id != thread_id: ref_post.send_to_websocket(request, recursive=False) def save(self, force_insert=False, force_update=False, using=None, update_fields=None): self._text_rendered = bbcode_extended(self.get_raw_text()) super().save(force_insert, force_update, using, update_fields) def get_text(self) -> str: return self._text_rendered def get_raw_text(self) -> str: return self.text