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Use multiline preparser (treat line breaks as line start)
Use multiline preparser (treat line breaks as line start)

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post.py
444 lines | 13.0 KiB | text/x-python | PythonLexer
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 import RequestContext
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_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'
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"
}
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:
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 #{} with title "{}" by {}'.format(
post.id, post.title, post.poster_ip))
if image:
post_image = PostImage.objects.create(image=image)
post.images.add(post_image)
logger.info('Created image #{} for post #{}'.format(
post_image.id, post.id))
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):
"""
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):
"""
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 += '<a href="%s">&gt;&gt;%s</a>' % (refpost.get_url(),
refpost.id)
first = False
self.refmap = map_string
def get_sorted_referenced_posts(self):
return self.refmap
def is_referenced(self):
if not self.refmap:
return False
else:
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_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. If the post is opening,
thread with all posts is deleted.
"""
self.images.all().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 P#{}/{}'.format(self.id, self.get_title()))
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
# TODO Use dict here
return render_to_string('boards/api_post.html',
context_instance=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 = logging.getLogger('boards.post.websocket')
logger.info('Sent 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]
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):
return self._text_rendered
def get_raw_text(self):
return self.text