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import os
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from random import random
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import re
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import time
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import math
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from django.db import models
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from django.http import Http404
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from django.utils import timezone
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from markupfield.fields import MarkupField
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from neboard import settings
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import thumbs
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IMAGE_THUMB_SIZE = (200, 150)
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TITLE_MAX_LENGTH = 50
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DEFAULT_MARKUP_TYPE = 'markdown'
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NO_PARENT = -1
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NO_IP = '0.0.0.0'
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UNKNOWN_UA = ''
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ALL_PAGES = -1
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OPENING_POST_POPULARITY_WEIGHT = 2
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IMAGES_DIRECTORY = 'images/'
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FILE_EXTENSION_DELIMITER = '.'
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REGEX_PRETTY = re.compile(r'^\d(0)+$')
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REGEX_SAME = re.compile(r'^(.)\1+$')
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class PostManager(models.Manager):
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def create_post(self, title, text, image=None, parent_id=NO_PARENT,
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ip=NO_IP, tags=None):
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post = self.create(title=title,
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text=text,
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pub_time=timezone.now(),
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parent=parent_id,
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image=image,
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poster_ip=ip,
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poster_user_agent=UNKNOWN_UA,
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last_edit_time=timezone.now())
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if tags:
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map(post.tags.add, tags)
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if parent_id != NO_PARENT:
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self._bump_thread(parent_id)
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else:
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self._delete_old_threads()
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return post
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def delete_post(self, post):
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children = self.filter(parent=post.id)
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for child in children:
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self.delete_post(child)
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post.delete()
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def delete_posts_by_ip(self, ip):
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posts = self.filter(poster_ip=ip)
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for post in posts:
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self.delete_post(post)
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def get_threads(self, tag=None, page=ALL_PAGES,
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order_by='-last_edit_time'):
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if tag:
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threads = self.filter(parent=NO_PARENT, tags=tag)
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# TODO Throw error 404 if no threads for tag found?
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else:
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threads = self.filter(parent=NO_PARENT)
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threads = threads.order_by(order_by)
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if page != ALL_PAGES:
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thread_count = len(threads)
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if page < self.get_thread_page_count(tag=tag):
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start_thread = page * settings.THREADS_PER_PAGE
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end_thread = min(start_thread + settings.THREADS_PER_PAGE,
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thread_count)
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threads = threads[start_thread:end_thread]
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return threads
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def get_thread(self, opening_post_id):
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try:
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opening_post = self.get(id=opening_post_id, parent=NO_PARENT)
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except Post.DoesNotExist:
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raise Http404
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if opening_post.parent == NO_PARENT:
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replies = self.filter(parent=opening_post_id)
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thread = [opening_post]
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thread.extend(replies)
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return thread
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def exists(self, post_id):
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posts = self.filter(id=post_id)
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return posts.count() > 0
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def get_thread_page_count(self, tag=None):
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if tag:
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threads = self.filter(parent=NO_PARENT, tags=tag)
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else:
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threads = self.filter(parent=NO_PARENT)
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return int(math.ceil(threads.count() / float(
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settings.THREADS_PER_PAGE)))
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def _delete_old_threads(self):
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"""
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Preserves maximum thread count. If there are too many threads,
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delete the old ones.
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"""
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# TODO Move old threads to the archive instead of deleting them.
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# Maybe make some 'old' field in the model to indicate the thread
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# must not be shown and be able for replying.
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threads = self.get_threads()
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thread_count = len(threads)
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if thread_count > settings.MAX_THREAD_COUNT:
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num_threads_to_delete = thread_count - settings.MAX_THREAD_COUNT
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old_threads = threads[thread_count - num_threads_to_delete:]
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for thread in old_threads:
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self.delete_post(thread)
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def _bump_thread(self, thread_id):
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thread = self.get(id=thread_id)
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if thread.can_bump():
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thread.last_edit_time = timezone.now()
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thread.save()
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class TagManager(models.Manager):
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def get_not_empty_tags(self):
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all_tags = self.all().order_by('name')
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tags = []
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for tag in all_tags:
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if not tag.is_empty():
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tags.append(tag)
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return tags
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def get_popular_tags(self):
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all_tags = self.get_not_empty_tags()
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sorted_tags = sorted(all_tags, key=lambda tag: tag.get_popularity(),
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reverse=True)
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return sorted_tags[:settings.POPULAR_TAGS]
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class Tag(models.Model):
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"""
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A tag is a text node assigned to the post. The tag serves as a board
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section. There can be multiple tags for each message
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"""
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objects = TagManager()
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name = models.CharField(max_length=100)
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# TODO Connect the tag to its posts to check the number of threads for
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# the tag.
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def __unicode__(self):
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return self.name
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def is_empty(self):
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return self.get_post_count() == 0
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def get_post_count(self):
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posts_with_tag = Post.objects.get_threads(tag=self)
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return posts_with_tag.count()
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def get_popularity(self):
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posts_with_tag = Post.objects.get_threads(tag=self)
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reply_count = 0
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for post in posts_with_tag:
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reply_count += post.get_reply_count()
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reply_count += OPENING_POST_POPULARITY_WEIGHT
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return reply_count
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class Post(models.Model):
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"""A post is a message."""
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objects = PostManager()
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def _update_image_filename(self, filename):
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"""Get unique image filename"""
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path = IMAGES_DIRECTORY
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new_name = str(int(time.mktime(time.gmtime())))
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new_name += str(int(random() * 1000))
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new_name += FILE_EXTENSION_DELIMITER
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new_name += filename.split(FILE_EXTENSION_DELIMITER)[-1:][0]
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return os.path.join(path, new_name)
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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 = MarkupField(default_markup_type=DEFAULT_MARKUP_TYPE,
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escape_html=True)
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image = thumbs.ImageWithThumbsField(upload_to=_update_image_filename,
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blank=True, sizes=(IMAGE_THUMB_SIZE,))
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poster_ip = models.IPAddressField()
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poster_user_agent = models.TextField()
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parent = models.BigIntegerField()
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tags = models.ManyToManyField(Tag)
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last_edit_time = models.DateTimeField()
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def __unicode__(self):
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return '#' + str(self.id) + ' ' + self.title + ' (' + self.text.raw + \
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')'
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def _get_replies(self):
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return Post.objects.filter(parent=self.id)
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def get_reply_count(self):
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return self._get_replies().count()
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def get_images_count(self):
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images_count = 1 if self.image else 0
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for reply in self._get_replies():
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if reply.image:
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images_count += 1
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return images_count
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def get_gets_count(self):
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gets_count = 1 if self.is_get() else 0
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for reply in self._get_replies():
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if reply.is_get():
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gets_count += 1
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return gets_count
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def is_get(self):
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"""If the post has pretty id (1, 1000, 77777), than it is called GET"""
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first = self.id == 1
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id_str = str(self.id)
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pretty = REGEX_PRETTY.match(id_str)
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same_digits = REGEX_SAME.match(id_str)
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return first or pretty or same_digits
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def can_bump(self):
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"""Check if the thread can be bumped by replying"""
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replies_count = len(Post.objects.get_thread(self.id))
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return replies_count <= settings.MAX_POSTS_PER_THREAD
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def get_last_replies(self):
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if settings.LAST_REPLIES_COUNT > 0:
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reply_count = self.get_reply_count()
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if reply_count > 0:
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reply_count_to_show = min(settings.LAST_REPLIES_COUNT,
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reply_count)
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last_replies = self._get_replies()[reply_count
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- reply_count_to_show:]
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return last_replies
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class Admin(models.Model):
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"""
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Model for admin users
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"""
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name = models.CharField(max_length=100)
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password = models.CharField(max_length=100)
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def __unicode__(self):
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return self.name + '/' + '*' * len(self.password)
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