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from datetime import datetime, timedelta, date
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from datetime import time as dtime
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import logging
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import re
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from adjacent import Client
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from django.core.cache import cache
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from django.core.urlresolvers import reverse
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from django.db import models, transaction
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from django.db.models import TextField
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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 boards import settings
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from boards.mdx_neboard import bbcode_extended
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from boards.models import PostImage
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from boards.models.base import Viewable
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from boards.models.thread import Thread
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from boards.utils import datetime_to_epoch
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WS_NOTIFICATION_TYPE_NEW_POST = 'new_post'
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WS_NOTIFICATION_TYPE = 'notification_type'
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WS_CHANNEL_THREAD = "thread:"
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APP_LABEL_BOARDS = 'boards'
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CACHE_KEY_PPD = 'ppd'
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CACHE_KEY_POST_URL = 'post_url'
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POSTS_PER_DAY_RANGE = 7
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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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# TODO This should be removed
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NO_IP = '0.0.0.0'
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# TODO Real user agent should be saved instead of this
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UNKNOWN_UA = ''
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REGEX_REPLY = re.compile(r'\[post\](\d+)\[/post\]')
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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_BUMPABLE = 'bumpable'
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PARAMETER_THREAD = 'thread'
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PARAMETER_IS_OPENING = 'is_opening'
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PARAMETER_MODERATOR = 'moderator'
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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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DIFF_TYPE_HTML = 'html'
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DIFF_TYPE_JSON = 'json'
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PREPARSE_PATTERNS = {
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r'>>(\d+)': r'[post]\1[/post]', # Reflink ">>123"
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r'^>([^>].+)': r'[quote]\1[/quote]', # Quote ">text"
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r'^//(.+)': r'[comment]\1[/comment]', # Comment "//text"
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}
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class PostManager(models.Manager):
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@transaction.atomic
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def create_post(self, title: str, text: str, image=None, thread=None,
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ip=NO_IP, tags: list=None):
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"""
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Creates new post
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"""
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if not tags:
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tags = []
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posting_time = timezone.now()
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if not thread:
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thread = Thread.objects.create(bump_time=posting_time,
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last_edit_time=posting_time)
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new_thread = True
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else:
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new_thread = False
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pre_text = self._preparse_text(text)
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post = self.create(title=title,
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text=pre_text,
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pub_time=posting_time,
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thread_new=thread,
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poster_ip=ip,
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poster_user_agent=UNKNOWN_UA, # TODO Get UA at
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# last!
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last_edit_time=posting_time)
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logger = logging.getLogger('boards.post.create')
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logger.info('Created post {} by {}'.format(
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post, post.poster_ip))
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if image:
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# Try to find existing image. If it exists, assign it to the post
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# instead of createing the new one
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image_hash = PostImage.get_hash(image)
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existing = PostImage.objects.filter(hash=image_hash)
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if len(existing) > 0:
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post_image = existing[0]
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else:
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post_image = PostImage.objects.create(image=image)
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logger.info('Created new image #{} for post #{}'.format(
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post_image.id, post.id))
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post.images.add(post_image)
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thread.replies.add(post)
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list(map(thread.add_tag, tags))
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if new_thread:
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Thread.objects.process_oldest_threads()
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else:
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thread.bump()
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thread.last_edit_time = posting_time
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thread.save()
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self.connect_replies(post)
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return post
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def delete_posts_by_ip(self, ip):
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"""
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Deletes all posts of the author with same IP
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"""
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posts = self.filter(poster_ip=ip)
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for post in posts:
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post.delete()
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def connect_replies(self, post):
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"""
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Connects replies to a post to show them as a reflink map
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"""
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for reply_number in re.finditer(REGEX_REPLY, post.get_raw_text()):
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post_id = reply_number.group(1)
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ref_post = self.filter(id=post_id)
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if ref_post.count() > 0:
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referenced_post = ref_post[0]
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referenced_post.referenced_posts.add(post)
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referenced_post.last_edit_time = post.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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referenced_thread = referenced_post.get_thread()
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referenced_thread.last_edit_time = post.pub_time
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referenced_thread.save(update_fields=['last_edit_time'])
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def get_posts_per_day(self):
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"""
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Gets average count of posts per day for the last 7 days
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"""
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day_end = date.today()
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day_start = day_end - timedelta(POSTS_PER_DAY_RANGE)
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cache_key = CACHE_KEY_PPD + str(day_end)
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ppd = cache.get(cache_key)
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if ppd:
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return ppd
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day_time_start = timezone.make_aware(datetime.combine(
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day_start, dtime()), timezone.get_current_timezone())
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day_time_end = timezone.make_aware(datetime.combine(
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day_end, dtime()), timezone.get_current_timezone())
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posts_per_period = float(self.filter(
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pub_time__lte=day_time_end,
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pub_time__gte=day_time_start).count())
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ppd = posts_per_period / POSTS_PER_DAY_RANGE
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cache.set(cache_key, ppd)
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return ppd
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def _preparse_text(self, text):
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"""
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Preparses text to change patterns like '>>' to a proper bbcode
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tags.
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"""
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for key, value in PREPARSE_PATTERNS.items():
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text = re.sub(key, value, text, flags=re.MULTILINE)
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return text
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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)
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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='ip+', db_index=True)
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poster_ip = models.GenericIPAddressField()
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poster_user_agent = models.TextField()
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thread_new = models.ForeignKey('Thread', null=True, default=None,
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db_index=True)
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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='rfp+',
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db_index=True)
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refmap = models.TextField(null=True, blank=True)
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def __str__(self):
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return 'P#{}/{}'.format(self.id, self.title)
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def get_title(self) -> str:
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"""
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Gets original post title or part of its text.
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"""
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title = self.title
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if not title:
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title = self.get_text()
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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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map_string = ''
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first = True
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for refpost in self.referenced_posts.all():
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if not first:
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map_string += ', '
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map_string += '<a href="%s">>>%s</a>' % (refpost.get_url(),
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refpost.id)
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first = False
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self.refmap = map_string
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def get_sorted_referenced_posts(self):
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return self.refmap
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def is_referenced(self) -> bool:
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if not self.refmap:
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return False
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else:
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return 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.get_thread().get_opening_post_id() == self.id
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@transaction.atomic
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def add_tag(self, tag):
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edit_time = timezone.now()
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thread = self.get_thread()
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thread.add_tag(tag)
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self.last_edit_time = edit_time
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self.save(update_fields=['last_edit_time'])
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thread.last_edit_time = edit_time
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thread.save(update_fields=['last_edit_time'])
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def get_url(self, thread=None):
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"""
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Gets full url to the post.
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"""
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cache_key = CACHE_KEY_POST_URL + str(self.id)
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link = cache.get(cache_key)
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if not link:
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if not thread:
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thread = self.get_thread()
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opening_id = thread.get_opening_post_id()
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if self.id != opening_id:
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link = reverse('thread', kwargs={
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'post_id': opening_id}) + '#' + str(self.id)
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else:
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link = reverse('thread', kwargs={'post_id': self.id})
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cache.set(cache_key, link)
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return link
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def get_thread(self) -> Thread:
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"""
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Gets post's thread.
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"""
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return self.thread_new
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def get_referenced_posts(self):
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return self.referenced_posts.only('id', 'thread_new')
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def get_view(self, moderator=False, need_open_link=False,
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truncated=False, *args, **kwargs):
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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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is_opening = kwargs.get(PARAMETER_IS_OPENING, self.is_opening())
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thread = kwargs.get(PARAMETER_THREAD, self.get_thread())
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can_bump = kwargs.get(PARAMETER_BUMPABLE, thread.can_bump())
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if is_opening:
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opening_post_id = self.id
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else:
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opening_post_id = thread.get_opening_post_id()
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return render_to_string('boards/post.html', {
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PARAMETER_POST: self,
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PARAMETER_MODERATOR: moderator,
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PARAMETER_IS_OPENING: is_opening,
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PARAMETER_THREAD: thread,
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PARAMETER_BUMPABLE: can_bump,
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PARAMETER_NEED_OPEN_LINK: need_open_link,
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PARAMETER_TRUNCATED: truncated,
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PARAMETER_OP_ID: opening_post_id,
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})
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def get_search_view(self, *args, **kwargs):
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return self.get_view(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 = Post.objects.filter(images__in=[image]).count()
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if image_refs_count == 1:
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image.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):
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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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if format_type == DIFF_TYPE_HTML:
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params = dict()
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params['post'] = self
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if PARAMETER_TRUNCATED in request.GET:
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params[PARAMETER_TRUNCATED] = True
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return render_to_string('boards/api_post.html', params)
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elif format_type == DIFF_TYPE_JSON:
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post_json = {
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'id': self.id,
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'title': self.title,
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'text': self._text_rendered,
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}
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if self.images.exists():
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post_image = self.get_first_image()
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post_json['image'] = post_image.image.url
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post_json['image_preview'] = post_image.image.url_200x150
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if include_last_update:
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post_json['bump_time'] = datetime_to_epoch(
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self.thread_new.bump_time)
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return post_json
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def send_to_websocket(self, request, 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.WEBSOCKETS_ENABLED:
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return
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client = Client()
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thread = self.get_thread()
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thread_id = thread.id
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channel_name = WS_CHANNEL_THREAD + str(thread.get_opening_post_id())
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client.publish(channel_name, {
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WS_NOTIFICATION_TYPE: WS_NOTIFICATION_TYPE_NEW_POST,
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})
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client.send()
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logger = logging.getLogger('boards.post.websocket')
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logger.info('Sent notification from post #{} to channel {}'.format(
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self.id, channel_name))
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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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ref_post = Post.objects.filter(id=post_id)[0]
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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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if ref_post.thread_new_id != thread_id:
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ref_post.send_to_websocket(request, recursive=False)
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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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self._text_rendered = bbcode_extended(self.get_raw_text())
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super().save(force_insert, force_update, using, update_fields)
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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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