import uuid
import re
from boards import settings
from boards.abstracts.tripcode import Tripcode
from boards.models import PostImage, Attachment, KeyPair, GlobalId
from boards.models.base import Viewable
from boards.models.post.export import get_exporter, DIFF_TYPE_JSON
from boards.models.post.manager import PostManager
from boards.utils import datetime_to_epoch
from django.core.exceptions import ObjectDoesNotExist
from django.core.urlresolvers import reverse
from django.db import models
from django.db.models import TextField, QuerySet, F
from django.template.defaultfilters import truncatewords, striptags
from django.template.loader import render_to_string
CSS_CLS_HIDDEN_POST = 'hidden_post'
CSS_CLS_DEAD_POST = 'dead_post'
CSS_CLS_ARCHIVE_POST = 'archive_post'
CSS_CLS_POST = 'post'
CSS_CLS_MONOCHROME = 'monochrome'
TITLE_MAX_WORDS = 10
APP_LABEL_BOARDS = 'boards'
BAN_REASON_AUTO = 'Auto'
IMAGE_THUMB_SIZE = (200, 150)
TITLE_MAX_LENGTH = 200
REGEX_REPLY = re.compile(r'\[post\](\d+)\[/post\]')
REGEX_GLOBAL_REPLY = re.compile(r'\[post\](\w+)::([^:]+)::(\d+)\[/post\]')
REGEX_URL = re.compile(r'https?\://[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(/\S*)?')
REGEX_NOTIFICATION = re.compile(r'\[user\](\w+)\[/user\]')
PARAMETER_TRUNCATED = 'truncated'
PARAMETER_TAG = 'tag'
PARAMETER_OFFSET = 'offset'
PARAMETER_DIFF_TYPE = 'type'
PARAMETER_CSS_CLASS = 'css_class'
PARAMETER_THREAD = 'thread'
PARAMETER_IS_OPENING = 'is_opening'
PARAMETER_POST = 'post'
PARAMETER_OP_ID = 'opening_post_id'
PARAMETER_NEED_OPEN_LINK = 'need_open_link'
PARAMETER_REPLY_LINK = 'reply_link'
PARAMETER_NEED_OP_DATA = 'need_op_data'
POST_VIEW_PARAMS = (
'need_op_data',
'reply_link',
'need_open_link',
'truncated',
'mode_tree',
'perms',
'tree_depth',
)
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, null=True, blank=True)
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='post_images', db_index=True)
attachments = models.ManyToManyField(Attachment, null=True, blank=True,
related_name='attachment_posts')
poster_ip = models.GenericIPAddressField()
# TODO This field can be removed cause UID is used for update now
last_edit_time = models.DateTimeField()
referenced_posts = models.ManyToManyField('Post', symmetrical=False,
null=True,
blank=True, related_name='refposts',
db_index=True)
refmap = models.TextField(null=True, blank=True)
threads = models.ManyToManyField('Thread', db_index=True,
related_name='multi_replies')
thread = models.ForeignKey('Thread', db_index=True, related_name='pt+')
url = models.TextField()
uid = models.TextField(db_index=True)
# Global ID with author key. If the message was downloaded from another
# server, this indicates the server.
global_id = models.OneToOneField(GlobalId, null=True, blank=True,
on_delete=models.CASCADE)
tripcode = models.CharField(max_length=50, blank=True, default='')
opening = models.BooleanField(db_index=True)
hidden = models.BooleanField(default=False)
version = models.IntegerField(default=1)
def __str__(self):
return 'P#{}/{}'.format(self.id, self.get_title())
def get_title(self) -> str:
return self.title
def get_title_or_text(self):
title = self.get_title()
if not title:
title = truncatewords(striptags(self.get_text()), TITLE_MAX_WORDS)
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.
"""
post_urls = [refpost.get_link_view()
for refpost in self.referenced_posts.all()]
self.refmap = ', '.join(post_urls)
def is_referenced(self) -> bool:
return self.refmap and len(self.refmap) > 0
def is_opening(self) -> bool:
"""
Checks if this is an opening post or just a reply.
"""
return self.opening
def get_absolute_url(self, thread=None):
url = None
if thread is None:
thread = self.get_thread()
# Url is cached only for the "main" thread. When getting url
# for other threads, do it manually.
if self.url:
url = self.url
if url is None:
opening = self.is_opening()
opening_id = self.id if opening else thread.get_opening_post_id()
url = reverse('thread', kwargs={'post_id': opening_id})
if not opening:
url += '#' + str(self.id)
return url
def get_thread(self):
return self.thread
def get_thread_id(self):
return self.thread_id
def get_threads(self) -> QuerySet:
"""
Gets post's thread.
"""
return self.threads
def _get_cache_key(self):
return [datetime_to_epoch(self.last_edit_time)]
def get_view(self, *args, **kwargs) -> str:
"""
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.
"""
thread = self.get_thread()
css_classes = [CSS_CLS_POST]
if thread.is_archived():
css_classes.append(CSS_CLS_ARCHIVE_POST)
elif not thread.can_bump():
css_classes.append(CSS_CLS_DEAD_POST)
if self.is_hidden():
css_classes.append(CSS_CLS_HIDDEN_POST)
if thread.is_monochrome():
css_classes.append(CSS_CLS_MONOCHROME)
params = dict()
for param in POST_VIEW_PARAMS:
if param in kwargs:
params[param] = kwargs[param]
params.update({
PARAMETER_POST: self,
PARAMETER_IS_OPENING: self.is_opening(),
PARAMETER_THREAD: thread,
PARAMETER_CSS_CLASS: ' '.join(css_classes),
})
return render_to_string('boards/post.html', params)
def get_search_view(self, *args, **kwargs):
return self.get_view(need_op_data=True, *args, **kwargs)
def get_first_image(self) -> PostImage:
return self.images.earliest('id')
def set_global_id(self, key_pair=None):
"""
Sets global id based on the given key pair. If no key pair is given,
default one is used.
"""
if key_pair:
key = key_pair
else:
try:
key = KeyPair.objects.get(primary=True)
except KeyPair.DoesNotExist:
# Do not update the global id because there is no key defined
return
global_id = GlobalId(key_type=key.key_type,
key=key.public_key,
local_id=self.id)
global_id.save()
self.global_id = global_id
self.save(update_fields=['global_id'])
def get_pub_time_str(self):
return str(self.pub_time)
def get_replied_ids(self):
"""
Gets ID list of the posts that this post replies.
"""
raw_text = self.get_raw_text()
local_replied = REGEX_REPLY.findall(raw_text)
global_replied = []
for match in REGEX_GLOBAL_REPLY.findall(raw_text):
key_type = match[0]
key = match[1]
local_id = match[2]
try:
global_id = GlobalId.objects.get(key_type=key_type,
key=key, local_id=local_id)
for post in Post.objects.filter(global_id=global_id).only('id'):
global_replied.append(post.id)
except GlobalId.DoesNotExist:
pass
return local_replied + global_replied
def get_post_data(self, format_type=DIFF_TYPE_JSON, request=None,
include_last_update=False) -> str:
"""
Gets post HTML or JSON data that can be rendered on a page or used by
API.
"""
return get_exporter(format_type).export(self, request,
include_last_update)
def notify_clients(self, recursive=True):
"""
Sends post HTML data to the thread web socket.
"""
if not settings.get_bool('External', 'WebsocketsEnabled'):
return
thread_ids = list()
for thread in self.get_threads().all():
thread_ids.append(thread.id)
thread.notify_clients()
if recursive:
for reply_number in re.finditer(REGEX_REPLY, self.get_raw_text()):
post_id = reply_number.group(1)
try:
ref_post = Post.objects.get(id=post_id)
if ref_post.get_threads().exclude(id__in=thread_ids).exists():
# If post is in this thread, its thread was already notified.
# Otherwise, notify its thread separately.
ref_post.notify_clients(recursive=False)
except ObjectDoesNotExist:
pass
def build_url(self):
self.url = self.get_absolute_url()
self.save(update_fields=['url'])
def save(self, force_insert=False, force_update=False, using=None,
update_fields=None):
new_post = self.id is None
self.uid = str(uuid.uuid4())
if update_fields is not None and 'uid' not in update_fields:
update_fields += ['uid']
if not new_post:
for thread in self.get_threads().all():
thread.last_edit_time = self.last_edit_time
thread.save(update_fields=['last_edit_time', 'status'])
super().save(force_insert, force_update, using, update_fields)
if self.url is None:
self.build_url()
def get_text(self) -> str:
return self._text_rendered
def get_raw_text(self) -> str:
return self.text
def get_sync_text(self) -> str:
"""
Returns text applicable for sync. It has absolute post reflinks.
"""
replacements = dict()
for post_id in REGEX_REPLY.findall(self.get_raw_text()):
absolute_post_id = str(Post.objects.get(id=post_id).global_id)
replacements[post_id] = absolute_post_id
text = self.get_raw_text() or ''
for key in replacements:
text = text.replace('[post]{}[/post]'.format(key),
'[post]{}[/post]'.format(replacements[key]))
text = text.replace('\r\n', '\n').replace('\r', '\n')
return text
def connect_threads(self, opening_posts):
for opening_post in opening_posts:
threads = opening_post.get_threads().all()
for thread in threads:
if thread.can_bump():
thread.update_bump_status()
thread.last_edit_time = self.last_edit_time
thread.save(update_fields=['last_edit_time', 'status'])
self.threads.add(opening_post.get_thread())
def get_tripcode(self):
if self.tripcode:
return Tripcode(self.tripcode)
def get_link_view(self):
"""
Gets view of a reflink to the post.
"""
result = '>>{}'.format(self.get_absolute_url(),
self.id)
if self.is_opening():
result = '{}'.format(result)
return result
def is_hidden(self) -> bool:
return self.hidden
def set_hidden(self, hidden):
self.hidden = hidden
def increment_version(self):
self.version = F('version') + 1
def clear_cache(self):
global_id = self.global_id
if global_id is not None and global_id.is_local()\
and global_id.content is not None:
global_id.content = None
global_id.save()
global_id.signature_set.all().delete()