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import logging
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import re
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import uuid
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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.loader import render_to_string
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from django.utils import timezone
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from boards.mdx_neboard import Parser
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from boards.models import KeyPair, GlobalId
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from boards import settings
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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.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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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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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_GLOBAL_REPLY = re.compile(r'\[post\](\w+)::([^:]+)::(\d+)\[/post\]')
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REGEX_URL = re.compile(r'https?\://[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(/\S*)?')
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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_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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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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'moderator',
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'need_open_link',
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'truncated',
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'mode_tree',
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)
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REFMAP_STR = '<a href="{}">>>{}</a>'
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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='ip+', db_index=True)
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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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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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# Global ID with author key. If the message was downloaded from another
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# server, this indicates the server.
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global_id = models.OneToOneField('GlobalId', null=True, blank=True)
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# One post can be signed by many nodes that give their trust to it
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signature = models.ManyToManyField('Signature', 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_referenced_posts(self):
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threads = self.get_threads().all()
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return self.referenced_posts.filter(threads__in=threads) \
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.order_by('pub_time').distinct().all()
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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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post_urls = [REFMAP_STR.format(refpost.get_absolute_url(), refpost.id)
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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.get_thread().get_opening_post_id() == self.id
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def get_absolute_url(self):
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if self.url:
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return self.url
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else:
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opening_id = self.get_thread().get_opening_post_id()
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post_url = reverse('thread', kwargs={'post_id': opening_id})
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if self.id != opening_id:
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post_url += '#' + str(self.id)
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return post_url
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def get_thread(self):
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return self.thread
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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_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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is_opening = kwargs.get(PARAMETER_IS_OPENING, self.is_opening())
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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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css_class = 'post'
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if thread.archived:
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css_class += ' archive_post'
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elif not thread.can_bump():
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css_class += ' dead_post'
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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: is_opening,
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PARAMETER_THREAD: thread,
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PARAMETER_CSS_CLASS: css_class,
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PARAMETER_OP_ID: opening_post_id,
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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 = 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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self.signature.all().delete()
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if self.global_id:
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self.global_id.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 set_global_id(self, key_pair=None):
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"""
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Sets global id based on the given key pair. If no key pair is given,
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default one is used.
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"""
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if key_pair:
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key = key_pair
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else:
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try:
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key = KeyPair.objects.get(primary=True)
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except KeyPair.DoesNotExist:
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# Do not update the global id because there is no key defined
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return
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global_id = GlobalId(key_type=key.key_type,
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key=key.public_key,
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local_id=self.id)
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global_id.save()
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self.global_id = global_id
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self.save(update_fields=['global_id'])
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def get_pub_time_str(self):
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return str(self.pub_time)
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def get_replied_ids(self):
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"""
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Gets ID list of the posts that this post replies.
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"""
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raw_text = self.get_raw_text()
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local_replied = REGEX_REPLY.findall(raw_text)
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global_replied = []
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for match in REGEX_GLOBAL_REPLY.findall(raw_text):
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key_type = match[0]
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key = match[1]
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local_id = match[2]
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try:
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global_id = GlobalId.objects.get(key_type=key_type,
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key=key, local_id=local_id)
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for post in Post.objects.filter(global_id=global_id).only('id'):
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global_replied.append(post.id)
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except GlobalId.DoesNotExist:
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pass
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return local_replied + global_replied
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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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self._text_rendered = Parser().parse(self.get_raw_text())
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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 self.id:
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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'])
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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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def get_sync_text(self) -> str:
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"""
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Returns text applicable for sync. It has absolute post reflinks.
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"""
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replacements = dict()
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for post_id in REGEX_REPLY.findall(self.get_raw_text()):
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absolute_post_id = str(Post.objects.get(id=post_id).global_id)
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replacements[post_id] = absolute_post_id
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text = self.get_raw_text()
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for key in replacements:
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text = text.replace('[post]{}[/post]'.format(key),
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'[post]{}[/post]'.format(replacements[key]))
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return text
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def get_absolute_id(self) -> str:
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"""
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If the post has many threads, shows its main thread OP id in the post
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ID.
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"""
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if self.get_threads().count() > 1:
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return '{}/{}'.format(self.get_thread().get_opening_post_id(), self.id)
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else:
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return str(self.id)
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def connect_notifications(self):
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for reply_number in re.finditer(REGEX_NOTIFICATION, self.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=self)
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def connect_replies(self):
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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, self.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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referenced_post.referenced_posts.add(self)
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referenced_post.last_edit_time = self.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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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', 'bumpable'])
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self.threads.add(opening_post.get_thread())
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