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import logging
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import re
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import uuid
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from boards.utils import datetime_to_epoch
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from django.core.exceptions import ObjectDoesNotExist
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from django.core.urlresolvers import reverse
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from django.db import models
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from django.db.models import TextField, QuerySet
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from django.template.defaultfilters import striptags, truncatewords
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from django.template.loader import render_to_string
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from django.utils import timezone
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from django.db.models.signals import post_save, pre_save
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from django.dispatch import receiver
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from boards import settings
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from boards.abstracts.tripcode import Tripcode
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from boards.mdx_neboard import get_parser
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from boards.models import PostImage, Attachment
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from boards.models.base import Viewable
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from boards.models.post.export import get_exporter, DIFF_TYPE_JSON
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from boards.models.post.manager import PostManager
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from boards.models.user import Notification
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CSS_CLS_HIDDEN_POST = 'hidden_post'
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CSS_CLS_DEAD_POST = 'dead_post'
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CSS_CLS_ARCHIVE_POST = 'archive_post'
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CSS_CLS_POST = 'post'
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CSS_CLS_MONOCHROME = 'monochrome'
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TITLE_MAX_WORDS = 10
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APP_LABEL_BOARDS = 'boards'
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BAN_REASON_AUTO = 'Auto'
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IMAGE_THUMB_SIZE = (200, 150)
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TITLE_MAX_LENGTH = 200
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REGEX_REPLY = re.compile(r'\[post\](\d+)\[/post\]')
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REGEX_NOTIFICATION = re.compile(r'\[user\](\w+)\[/user\]')
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PARAMETER_TRUNCATED = 'truncated'
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PARAMETER_TAG = 'tag'
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PARAMETER_OFFSET = 'offset'
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PARAMETER_DIFF_TYPE = 'type'
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PARAMETER_CSS_CLASS = 'css_class'
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PARAMETER_THREAD = 'thread'
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PARAMETER_IS_OPENING = 'is_opening'
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PARAMETER_POST = 'post'
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PARAMETER_OP_ID = 'opening_post_id'
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PARAMETER_NEED_OPEN_LINK = 'need_open_link'
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PARAMETER_REPLY_LINK = 'reply_link'
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PARAMETER_NEED_OP_DATA = 'need_op_data'
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POST_VIEW_PARAMS = (
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'need_op_data',
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'reply_link',
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'need_open_link',
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'truncated',
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'mode_tree',
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'perms',
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'tree_depth',
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)
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class Post(models.Model, Viewable):
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"""A post is a message."""
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objects = PostManager()
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class Meta:
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app_label = APP_LABEL_BOARDS
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ordering = ('id',)
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title = models.CharField(max_length=TITLE_MAX_LENGTH, null=True, blank=True)
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pub_time = models.DateTimeField()
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text = TextField(blank=True, null=True)
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_text_rendered = TextField(blank=True, null=True, editable=False)
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images = models.ManyToManyField(PostImage, null=True, blank=True,
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related_name='post_images', db_index=True)
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attachments = models.ManyToManyField(Attachment, null=True, blank=True,
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related_name='attachment_posts')
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poster_ip = models.GenericIPAddressField()
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# TODO This field can be removed cause UID is used for update now
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last_edit_time = models.DateTimeField()
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referenced_posts = models.ManyToManyField('Post', symmetrical=False,
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null=True,
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blank=True, related_name='refposts',
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db_index=True)
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refmap = models.TextField(null=True, blank=True)
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threads = models.ManyToManyField('Thread', db_index=True,
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related_name='multi_replies')
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thread = models.ForeignKey('Thread', db_index=True, related_name='pt+')
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url = models.TextField()
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uid = models.TextField(db_index=True)
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tripcode = models.CharField(max_length=50, blank=True, default='')
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opening = models.BooleanField(db_index=True)
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hidden = models.BooleanField(default=False)
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def __str__(self):
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return 'P#{}/{}'.format(self.id, self.get_title())
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def get_title(self) -> str:
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return self.title
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def get_title_or_text(self):
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title = self.get_title()
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if not title:
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title = truncatewords(striptags(self.get_text()), TITLE_MAX_WORDS)
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return title
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def build_refmap(self) -> None:
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"""
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Builds a replies map string from replies list. This is a cache to stop
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the server from recalculating the map on every post show.
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"""
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post_urls = [refpost.get_link_view()
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for refpost in self.referenced_posts.all()]
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self.refmap = ', '.join(post_urls)
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def is_referenced(self) -> bool:
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return self.refmap and len(self.refmap) > 0
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def is_opening(self) -> bool:
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"""
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Checks if this is an opening post or just a reply.
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"""
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return self.opening
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def get_absolute_url(self, thread=None):
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url = None
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if thread is None:
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thread = self.get_thread()
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# Url is cached only for the "main" thread. When getting url
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# for other threads, do it manually.
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if self.url:
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url = self.url
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if url is None:
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opening = self.is_opening()
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opening_id = self.id if opening else thread.get_opening_post_id()
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url = reverse('thread', kwargs={'post_id': opening_id})
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if not opening:
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url += '#' + str(self.id)
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return url
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def get_thread(self):
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return self.thread
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def get_thread_id(self):
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return self.thread_id
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def get_threads(self) -> QuerySet:
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"""
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Gets post's thread.
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"""
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return self.threads
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def _get_cache_key(self):
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return [datetime_to_epoch(self.last_edit_time)]
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def get_view(self, *args, **kwargs) -> str:
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"""
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Renders post's HTML view. Some of the post params can be passed over
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kwargs for the means of caching (if we view the thread, some params
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are same for every post and don't need to be computed over and over.
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"""
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thread = self.get_thread()
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css_classes = [CSS_CLS_POST]
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if thread.is_archived():
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css_classes.append(CSS_CLS_ARCHIVE_POST)
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elif not thread.can_bump():
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css_classes.append(CSS_CLS_DEAD_POST)
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if self.is_hidden():
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css_classes.append(CSS_CLS_HIDDEN_POST)
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if thread.is_monochrome():
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css_classes.append(CSS_CLS_MONOCHROME)
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params = dict()
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for param in POST_VIEW_PARAMS:
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if param in kwargs:
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params[param] = kwargs[param]
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params.update({
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PARAMETER_POST: self,
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PARAMETER_IS_OPENING: self.is_opening(),
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PARAMETER_THREAD: thread,
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PARAMETER_CSS_CLASS: ' '.join(css_classes),
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})
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return render_to_string('boards/post.html', params)
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def get_search_view(self, *args, **kwargs):
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return self.get_view(need_op_data=True, *args, **kwargs)
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def get_first_image(self) -> PostImage:
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return self.images.earliest('id')
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def delete(self, using=None):
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"""
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Deletes all post images and the post itself.
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"""
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for image in self.images.all():
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image_refs_count = image.post_images.count()
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if image_refs_count == 1:
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image.delete()
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for attachment in self.attachments.all():
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attachment_refs_count = attachment.attachment_posts.count()
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if attachment_refs_count == 1:
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attachment.delete()
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thread = self.get_thread()
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thread.last_edit_time = timezone.now()
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thread.save()
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super(Post, self).delete(using)
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logging.getLogger('boards.post.delete').info(
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'Deleted post {}'.format(self))
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def get_post_data(self, format_type=DIFF_TYPE_JSON, request=None,
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include_last_update=False) -> str:
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"""
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Gets post HTML or JSON data that can be rendered on a page or used by
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API.
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"""
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return get_exporter(format_type).export(self, request,
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include_last_update)
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def notify_clients(self, recursive=True):
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"""
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Sends post HTML data to the thread web socket.
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"""
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if not settings.get_bool('External', 'WebsocketsEnabled'):
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return
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thread_ids = list()
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for thread in self.get_threads().all():
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thread_ids.append(thread.id)
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thread.notify_clients()
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if recursive:
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for reply_number in re.finditer(REGEX_REPLY, self.get_raw_text()):
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post_id = reply_number.group(1)
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try:
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ref_post = Post.objects.get(id=post_id)
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if ref_post.get_threads().exclude(id__in=thread_ids).exists():
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# If post is in this thread, its thread was already notified.
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# Otherwise, notify its thread separately.
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ref_post.notify_clients(recursive=False)
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except ObjectDoesNotExist:
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pass
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def build_url(self):
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self.url = self.get_absolute_url()
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self.save(update_fields=['url'])
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def save(self, force_insert=False, force_update=False, using=None,
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update_fields=None):
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new_post = self.id is None
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self.uid = str(uuid.uuid4())
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if update_fields is not None and 'uid' not in update_fields:
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update_fields += ['uid']
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if not new_post:
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for thread in self.get_threads().all():
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thread.last_edit_time = self.last_edit_time
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thread.save(update_fields=['last_edit_time', 'status'])
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super().save(force_insert, force_update, using, update_fields)
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if self.url is None:
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self.build_url()
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def get_text(self) -> str:
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return self._text_rendered
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def get_raw_text(self) -> str:
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return self.text
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def connect_threads(self, opening_posts):
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for opening_post in opening_posts:
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threads = opening_post.get_threads().all()
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for thread in threads:
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if thread.can_bump():
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thread.update_bump_status()
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thread.last_edit_time = self.last_edit_time
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thread.save(update_fields=['last_edit_time', 'status'])
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self.threads.add(opening_post.get_thread())
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def get_tripcode(self):
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if self.tripcode:
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return Tripcode(self.tripcode)
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def get_link_view(self):
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"""
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Gets view of a reflink to the post.
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"""
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result = '<a href="{}">>>{}</a>'.format(self.get_absolute_url(),
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self.id)
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if self.is_opening():
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result = '<b>{}</b>'.format(result)
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return result
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def is_hidden(self) -> bool:
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return self.hidden
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def set_hidden(self, hidden):
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self.hidden = hidden
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# SIGNALS (Maybe move to other module?)
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@receiver(post_save, sender=Post)
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def connect_replies(instance, **kwargs):
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for reply_number in re.finditer(REGEX_REPLY, instance.get_raw_text()):
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post_id = reply_number.group(1)
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try:
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referenced_post = Post.objects.get(id=post_id)
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# Connect only to posts that are not connected to already
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if not referenced_post.referenced_posts.filter(id=instance.id).exists():
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referenced_post.referenced_posts.add(instance)
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referenced_post.last_edit_time = instance.pub_time
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referenced_post.build_refmap()
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referenced_post.save(update_fields=['refmap', 'last_edit_time'])
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except ObjectDoesNotExist:
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pass
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@receiver(post_save, sender=Post)
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def connect_notifications(instance, **kwargs):
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for reply_number in re.finditer(REGEX_NOTIFICATION, instance.get_raw_text()):
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user_name = reply_number.group(1).lower()
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Notification.objects.get_or_create(name=user_name, post=instance)
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@receiver(pre_save, sender=Post)
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def preparse_text(instance, **kwargs):
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instance._text_rendered = get_parser().parse(instance.get_raw_text())
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