Optimized threads list.

boards/models.py

@@ -1,326 +1,326 b''
 import os
 from random import random
 import re
 import time
 import math
 
 from django.db import models
 from django.http import Http404
 from django.utils import timezone
 from markupfield.fields import MarkupField
 from threading import Thread
 
 from neboard import settings
 import thumbs
 
 IMAGE_THUMB_SIZE = (200, 150)
 
 TITLE_MAX_LENGTH = 50
 
 DEFAULT_MARKUP_TYPE = 'markdown'
 
 NO_PARENT = -1
 NO_IP = '0.0.0.0'
 UNKNOWN_UA = ''
 ALL_PAGES = -1
 OPENING_POST_POPULARITY_WEIGHT = 2
 IMAGES_DIRECTORY = 'images/'
 FILE_EXTENSION_DELIMITER = '.'
 
 RANK_ADMIN = 0
 RANK_MODERATOR = 10
 RANK_USER = 100
 
 
 class PostManager(models.Manager):
     def create_post(self, title, text, image=None, parent_id=NO_PARENT,
                     ip=NO_IP, tags=None, user=None):
         post = self.create(title=title,
                            text=text,
                            pub_time=timezone.now(),
                            parent=parent_id,
                            image=image,
                            poster_ip=ip,
                            poster_user_agent=UNKNOWN_UA,
                            last_edit_time=timezone.now(),
                            user=user)
 
         if tags:
             map(post.tags.add, tags)
 
         if parent_id != NO_PARENT:
             self._bump_thread(parent_id)
         else:
             self._delete_old_threads()
 
         return post
 
     def delete_post(self, post):
         children = self.filter(parent=post.id)
 
         map(self.delete_post, children)
         post.delete()
 
     def delete_posts_by_ip(self, ip):
         posts = self.filter(poster_ip=ip)
         map(self.delete_post, posts)
 
     def get_threads(self, tag=None, page=ALL_PAGES,
                     order_by='-last_edit_time'):
         if tag:
             threads = self.filter(parent=NO_PARENT, tags=tag)
 
             # TODO Throw error 404 if no threads for tag found?
         else:
             threads = self.filter(parent=NO_PARENT)
 
         threads = threads.order_by(order_by)
 
         if page != ALL_PAGES:
-            thread_count = len(threads)
+            thread_count = threads.count()
 
             if page < self.get_thread_page_count(tag=tag):
                 start_thread = page * settings.THREADS_PER_PAGE
                 end_thread = min(start_thread + settings.THREADS_PER_PAGE,
                                  thread_count)
                 threads = threads[start_thread:end_thread]
 
         return threads
 
     def get_thread(self, opening_post_id):
         try:
             opening_post = self.get(id=opening_post_id, parent=NO_PARENT)
         except Post.DoesNotExist:
             raise Http404
 
         if opening_post.parent == NO_PARENT:
             replies = self.filter(parent=opening_post_id)
 
             thread = [opening_post]
             thread.extend(replies)
 
             return thread
 
     def exists(self, post_id):
         posts = self.filter(id=post_id)
 
         return posts.count() > 0
 
     def get_thread_page_count(self, tag=None):
         if tag:
             threads = self.filter(parent=NO_PARENT, tags=tag)
         else:
             threads = self.filter(parent=NO_PARENT)
 
         return int(math.ceil(threads.count() / float(
             settings.THREADS_PER_PAGE)))
 
     def _delete_old_threads(self):
         """
         Preserves maximum thread count. If there are too many threads,
         delete the old ones.
         """
 
         # TODO Move old threads to the archive instead of deleting them.
         # Maybe make some 'old' field in the model to indicate the thread
         # must not be shown and be able for replying.
 
         threads = self.get_threads()
         thread_count = len(threads)
 
         if thread_count > settings.MAX_THREAD_COUNT:
             num_threads_to_delete = thread_count - settings.MAX_THREAD_COUNT
             old_threads = threads[thread_count - num_threads_to_delete:]
 
             map(self.delete_post, old_threads)
 
     def _bump_thread(self, thread_id):
         thread = self.get(id=thread_id)
 
         if thread.can_bump():
             thread.last_edit_time = timezone.now()
             thread.save()
 
 
 class TagManager(models.Manager):
     def get_not_empty_tags(self):
         all_tags = self.all().order_by('name')
         tags = []
         for tag in all_tags:
             if not tag.is_empty():
                 tags.append(tag)
 
         return tags
 
     def get_popular_tags(self):
         all_tags = self.get_not_empty_tags()
 
         sorted_tags = sorted(all_tags, key=lambda tag: tag.get_popularity(),
                              reverse=True)
 
         return sorted_tags[:settings.POPULAR_TAGS]
 
 
 class Tag(models.Model):
     """
     A tag is a text node assigned to the post. The tag serves as a board
     section. There can be multiple tags for each message
     """
 
     objects = TagManager()
 
     name = models.CharField(max_length=100)
 
     def __unicode__(self):
         return self.name
 
     def is_empty(self):
         return self.get_post_count() == 0
 
     def get_post_count(self):
         posts_with_tag = Post.objects.get_threads(tag=self)
         return posts_with_tag.count()
 
     def get_popularity(self):
         posts_with_tag = Post.objects.get_threads(tag=self)
         reply_count = 0
         for post in posts_with_tag:
             reply_count += post.get_reply_count()
             reply_count += OPENING_POST_POPULARITY_WEIGHT
 
         return reply_count
 
 
 class Post(models.Model):
     """A post is a message."""
 
     objects = PostManager()
 
     def _update_image_filename(self, filename):
         """Get unique image filename"""
 
         path = IMAGES_DIRECTORY
         new_name = str(int(time.mktime(time.gmtime())))
         new_name += str(int(random() * 1000))
         new_name += FILE_EXTENSION_DELIMITER
         new_name += filename.split(FILE_EXTENSION_DELIMITER)[-1:][0]
 
         return os.path.join(path, new_name)
 
     title = models.CharField(max_length=TITLE_MAX_LENGTH)
     pub_time = models.DateTimeField()
     text = MarkupField(default_markup_type=DEFAULT_MARKUP_TYPE,
                        escape_html=False)
 
     image_width = models.IntegerField(default=0)
     image_height = models.IntegerField(default=0)
 
     image = thumbs.ImageWithThumbsField(upload_to=_update_image_filename,
                                         blank=True, sizes=(IMAGE_THUMB_SIZE,),
                                         width_field='image_width',
                                         height_field='image_height')
 
     poster_ip = models.GenericIPAddressField()
     poster_user_agent = models.TextField()
     parent = models.BigIntegerField()
     tags = models.ManyToManyField(Tag)
     last_edit_time = models.DateTimeField()
     user = models.ForeignKey('User', null=True, default=None)
 
     def __unicode__(self):
         return '#' + str(self.id) + ' ' + self.title + ' (' + \
                self.text.raw[:50] + ')'
 
     def get_title(self):
         title = self.title
         if len(title) == 0:
             title = self.text.raw[:20]
 
         return title
 
     def _get_replies(self):
         return Post.objects.filter(parent=self.id)
 
     def get_reply_count(self):
         return self._get_replies().count()
 
     def get_images_count(self):
         images_count = 1 if self.image else 0
 
         replies = self._get_replies()
         for reply in replies:
             if reply.image:
                 images_count += 1
 
         return images_count
 
     def can_bump(self):
         """Check if the thread can be bumped by replying"""
 
         replies_count = self.get_reply_count() + 1
 
         return replies_count <= settings.MAX_POSTS_PER_THREAD
 
     def get_last_replies(self):
         if settings.LAST_REPLIES_COUNT > 0:
             reply_count = self.get_reply_count()
 
             if reply_count > 0:
                 reply_count_to_show = min(settings.LAST_REPLIES_COUNT,
                                           reply_count)
                 last_replies = self._get_replies()[reply_count
                                                    - reply_count_to_show:]
 
                 return last_replies
 
 
 class User(models.Model):
 
     user_id = models.CharField(max_length=50)
     rank = models.IntegerField()
 
     registration_time = models.DateTimeField()
     last_access_time = models.DateTimeField()
 
     fav_tags = models.ManyToManyField(Tag, null=True, blank=True)
     fav_threads = models.ManyToManyField(Post, related_name='+', null=True,
                                          blank=True)
 
     def save_setting(self, name, value):
         setting, created = Setting.objects.get_or_create(name=name, user=self)
         setting.value = value
         setting.save()
 
         return setting
 
     def get_setting(self, name):
         if Setting.objects.filter(name=name, user=self).exists():
             setting = Setting.objects.get(name=name, user=self)
             setting_value = setting.value
         else:
             setting_value = None
 
         return setting_value
 
     def is_moderator(self):
         return RANK_MODERATOR >= self.rank
 
     def get_sorted_fav_tags(self):
         return self.fav_tags.order_by('name')
 
     def __unicode__(self):
         return self.user_id + '(' + str(self.rank) + ')'
 
 
 class Setting(models.Model):
 
     name = models.CharField(max_length=50)
     value = models.CharField(max_length=50)
     user = models.ForeignKey(User)
 
 
 class Ban(models.Model):
     ip = models.GenericIPAddressField()
 
     def __unicode__(self):
         return self.ip

boards/templates/boards/posting_general.html

@@ -1,182 +1,182 b''
 {% extends "boards/base.html" %}
 
 {% load i18n %}
 {% load markup %}
 
 {% block head %}
     {% if tag %}
         <title>Neboard - {{ tag }}</title>
     {% else %}
         <title>Neboard</title>
     {% endif %}
 {% endblock %}
 
 {% block content %}
 
 {% if tag %}
     <div class="tag_info">
         <h2>{% trans 'Tag: ' %}{{ tag }}</h2>
     </div>
 {% endif %}
 
     {% if threads %}
         {% for thread in threads %}
             <div class="thread">
-            {% if thread.can_bump %}
-		        <div class="post" id="{{thread.id}}">
+            {% if thread.bumpable %}
+		        <div class="post" id="{{ thread.thread.id }}">
             {% else %}
-		        <div class="post dead_post" id="{{ thread.id }}">
+		        <div class="post dead_post" id="{{ thread.thread.id }}">
             {% endif %}
-            {% if thread.image %}
+            {% if thread.thread.image %}
                 <div class="image">
                     <a class="fancy"
-                       href="{{ thread.image.url }}"><img
-                            src="{{ thread.image.url_200x150 }}"
+                       href="{{ thread.thread.image.url }}"><img
+                            src="{{ thread.thread.image.url_200x150 }}"
                             alt="{% trans 'Post image' %}"
-                            data-width="{{ thread.image_width }}"
-                            data-height="{{ thread.image_height }}" />
+                            data-width="{{ thread.thread.image_width }}"
+                            data-height="{{ thread.thread.image_height }}" />
                     </a>
                 </div>
             {% endif %}
             <div class="message">
                 <div class="post-info">
-                    <span class="title">{{ thread.title }}</span>
-		    <a class="post_id" href="{% url 'thread' thread.id %}"
-			>(#{{ thread.id }})</a>
-                    [{{ thread.pub_time }}]
-                    [<a class="link" href="{% url 'thread' thread.id %}#form"
+                    <span class="title">{{ thread.thread.title }}</span>
+		    <a class="post_id" href="{% url 'thread' thread.thread.id %}"
+			>(#{{ thread.thread.id }})</a>
+                    [{{ thread.thread.pub_time }}]
+                    [<a class="link" href="{% url 'thread' thread.thread.id %}#form"
                         >{% trans "Reply" %}</a>]
 
                     {% if user.is_moderator %}
                         <span class="moderator_info">
-                            [<a href="{% url 'delete' post_id=thread.id %}?next={{ request.path }}"
+                            [<a href="{% url 'delete' post_id=thread.thread.id %}?next={{ request.path }}"
                                 >{% trans 'Delete' %}</a>]
-                            ({{ thread.poster_ip }})
-                            [<a href="{% url 'ban' post_id=thread.id %}?next={{ request.path }}"
+                            ({{ thread.thread.poster_ip }})
+                            [<a href="{% url 'ban' post_id=thread.thread.id %}?next={{ request.path }}"
                                 >{% trans 'Ban IP' %}</a>]
                         </span>
                     {% endif %}
                 </div>
                 {% autoescape off %}
-                    {{ thread.text.rendered|truncatewords_html:50 }}
+                    {{ thread.thread.text.rendered|truncatewords_html:50 }}
                 {% endautoescape %}
             </div>
             <div class="metadata">
-                {{ thread.get_reply_count }} {% trans 'replies' %},
-                {{ thread.get_images_count }} {% trans 'images' %}.
+                {{ thread.thread.get_reply_count }} {% trans 'replies' %},
+                {{ thread.thread.get_images_count }} {% trans 'images' %}.
                 {% if thread.tags.exists %}
                     <span class="tags">{% trans 'Tags' %}:
-                        {% for tag in thread.tags.all %}
+                        {% for tag in thread.thread.tags.all %}
                             <a class="tag" href="
                                     {% url 'tag' tag_name=tag.name %}">
                                 {{ tag.name }}</a>
                         {% endfor %}
                     </span>
                 {% endif %}
             </div>
             </div>
-            {% if thread.get_last_replies %}
+            {% if thread.thread.get_last_replies %}
                 <div class="last-replies">
-                    {% for post in thread.get_last_replies %}
-                        {% if thread.can_bump %}
+                    {% for post in thread.thread.get_last_replies %}
+                        {% if thread.bumpable %}
 			                <div class="post" id="{{ post.id }}">
                         {% else %}
-			                <div class="post dead_post id="{{ post.id }}">
+			                <div class="post dead_post" id="{{ post.id }}">
                         {% endif %}
                             {% if post.image %}
                                 <div class="image">
                                     <a class="fancy"
                                        href="{{ post.image.url }}"><img
                                             src=" {{ post.image.url_200x150 }}"
                                             alt="{% trans 'Post image' %}"
                                             data-width="{{ post.image_width }}"
                                             data-height="{{ post.image_height }}"/>
                                     </a>
                                 </div>
                             {% endif %}
                             <div class="message">
                                 <div class="post-info">
                                     <span class="title">{{ post.title }}</span>
                                     <a class="post_id" href="
-                                {% url 'thread' thread.id %}#{{ post.id }}">
+                                {% url 'thread' thread.thread.id %}#{{ post.id }}">
                                         (#{{ post.id }})</a>
                                     [{{ post.pub_time }}]
                                 </div>
                                 {% autoescape off %}
                                     {{ post.text.rendered|truncatewords_html:50 }}
                                 {% endautoescape %}
                         </div>
                         </div>
                     {% endfor %}
                 </div>
             {% endif %}
         </div>
         {% endfor %}
     {% else %}
         <div class="post">
             {% trans 'No threads exist. Create the first one!' %}</div>
 	{% endif %}
 
     <form enctype="multipart/form-data" method="post">{% csrf_token %}
     <div class="post-form-w">
 
         <div class="form-title">{% trans "Create new thread" %}</div>
         <div class="post-form">
             <div class="form-row">
                 <div class="form-label">{% trans 'Title' %}</div>
                 <div class="form-input">{{ form.title }}</div>
                 <div class="form-errors">{{ form.title.errors }}</div>
             </div>
             <div class="form-row">
                 <div class="form-label">{% trans 'Text' %}</div>
                 <div class="form-input">{{ form.text }}</div>
                 <div class="form-errors">{{ form.text.errors }}</div>
             </div>
             <div class="form-row">
                 <div class="form-label">{% trans 'Image' %}</div>
                 <div class="form-input">{{ form.image }}</div>
                 <div class="form-errors">{{ form.image.errors }}</div>
             </div>
             <div class="form-row">
                 <div class="form-label">{% trans 'Tags' %}</div>
                 <div class="form-input">{{ form.tags }}</div>
                 <div class="form-errors">{{ form.tags.errors }}</div>
             </div>
             <div class="form-row">
                 {{ form.captcha }}
                 <div class="form-errors">{{ form.captcha.errors }}</div>
             </div>
             <div class="form-row">
                 <div class="form-errors">{{ form.other.errors }}</div>
             </div>
         </div>
         <div class="form-submit">
             <input type="submit" value="{% trans "Post" %}"/></div>
         <div>
             {% trans 'Tags must be delimited by spaces. Text or image is required.' %}
         </div>
         <div><a href="{% url "staticpage" name="help" %}">
             {% trans 'Text syntax' %}</a></div>
     </div>
     </form>
 
 {% endblock %}
 
 {% block metapanel %}
 
     <span class="metapanel">
         <b><a href="{% url "authors" %}">Neboard</a> 1.1</b>
         {% trans "Pages:" %}
         {% for page in pages %}
             [<a href="
             {% if tag %}
                 {% url "tag" tag_name=tag page=page %}
             {% else %}
                 {% url "index" page=page %}
             {% endif %}
             ">{{ page }}</a>]
         {% endfor %}
         [<a href="rss/">RSS</a>]
     </span>
 
 {% endblock %}

boards/views.py

@@ -1,352 +1,355 b''
 import hashlib
 from django.core.urlresolvers import reverse
 from django.http import HttpResponseRedirect
 from django.template import RequestContext
 from django.shortcuts import render, redirect, get_object_or_404
 from django.utils import timezone
 
 from boards import forms
 import boards
 from boards import utils
 from boards.forms import ThreadForm, PostForm, SettingsForm, PlainErrorList, \
     ThreadCaptchaForm, PostCaptchaForm, LoginForm
 
 from boards.models import Post, Tag, Ban, User, RANK_USER, NO_PARENT
 from boards import authors
 import neboard
 
 
 def index(request, page=0):
     context = _init_default_context(request)
 
     if utils.need_include_captcha(request):
         threadFormClass = ThreadCaptchaForm
         kwargs = {'request': request}
     else:
         threadFormClass = ThreadForm
         kwargs = {}
 
     if request.method == 'POST':
         form = threadFormClass(request.POST, request.FILES,
                                error_class=PlainErrorList, **kwargs)
         form.session = request.session
 
         if form.is_valid():
             return _new_post(request, form)
     else:
         form = threadFormClass(error_class=PlainErrorList, **kwargs)
 
-    threads = Post.objects.get_threads(page=int(page))
+    threads = []
+    for thread in Post.objects.get_threads(page=int(page)):
+        threads.append({'thread': thread,
+                        'bumpable': thread.can_bump()})
 
     context['threads'] = None if len(threads) == 0 else threads
     context['form'] = form
     context['pages'] = range(Post.objects.get_thread_page_count())
 
     return render(request, 'boards/posting_general.html',
                   context)
 
 
 def _new_post(request, form, thread_id=boards.models.NO_PARENT):
     """Add a new post (in thread or as a reply)."""
 
     ip = _get_client_ip(request)
     is_banned = Ban.objects.filter(ip=ip).count() > 0
 
     if is_banned:
         return redirect(you_are_banned)
 
     data = form.cleaned_data
 
     title = data['title']
     text = data['text']
 
     if 'image' in data.keys():
         image = data['image']
     else:
         image = None
 
     tags = []
 
     new_thread = thread_id == boards.models.NO_PARENT
     if new_thread:
         tag_strings = data['tags']
 
         if tag_strings:
             tag_strings = tag_strings.split(' ')
             for tag_name in tag_strings:
                 tag_name = tag_name.strip()
                 if len(tag_name) > 0:
                     tag, created = Tag.objects.get_or_create(name=tag_name)
                     tags.append(tag)
 
     # TODO Add a possibility to define a link image instead of an image file.
     # If a link is given, download the image automatically.
 
     post = Post.objects.create_post(title=title, text=text, ip=ip,
                                     parent_id=thread_id, image=image,
                                     tags=tags)
 
     thread_to_show = (post.id if new_thread else thread_id)
 
     if new_thread:
         return redirect(thread, post_id=thread_to_show)
     else:
         return redirect(reverse(thread,
                                 kwargs={'post_id': thread_to_show}) + '#'
                         + str(post.id))
 
 
 def tag(request, tag_name, page=0):
     """Get all tag threads (posts without a parent)."""
 
     tag = get_object_or_404(Tag, name=tag_name)
     threads = Post.objects.get_threads(tag=tag, page=int(page))
 
     if request.method == 'POST':
         form = ThreadForm(request.POST, request.FILES,
                           error_class=PlainErrorList)
         if form.is_valid():
             return _new_post(request, form)
     else:
         form = forms.ThreadForm(initial={'tags': tag_name},
                                 error_class=PlainErrorList)
 
     context = _init_default_context(request)
     context['threads'] = None if len(threads) == 0 else threads
     context['tag'] = tag_name
     context['pages'] = range(Post.objects.get_thread_page_count(tag=tag))
 
     context['form'] = form
 
     return render(request, 'boards/posting_general.html',
                   context)
 
 
 def thread(request, post_id):
     """Get all thread posts"""
 
     if utils.need_include_captcha(request):
         postFormClass = PostCaptchaForm
         kwargs = {'request': request}
     else:
         postFormClass = PostForm
         kwargs = {}
 
     if request.method == 'POST':
         form = postFormClass(request.POST, request.FILES,
                              error_class=PlainErrorList, **kwargs)
         form.session = request.session
 
         if form.is_valid():
             return _new_post(request, form, post_id)
     else:
         form = postFormClass(error_class=PlainErrorList, **kwargs)
 
     posts = Post.objects.get_thread(post_id)
 
     context = _init_default_context(request)
 
     context['posts'] = posts
     context['form'] = form
     context['bumpable'] = posts[0].can_bump()
 
     return render(request, 'boards/thread.html', context)
 
 
 def login(request):
     """Log in with user id"""
 
     context = _init_default_context(request)
 
     if request.method == 'POST':
         form = LoginForm(request.POST, request.FILES,
                          error_class=PlainErrorList)
         if form.is_valid():
             user = User.objects.get(user_id=form.cleaned_data['user_id'])
             request.session['user_id'] = user.id
             return redirect(index)
 
     else:
         form = LoginForm()
 
     context['form'] = form
 
     return render(request, 'boards/login.html', context)
 
 
 def settings(request):
     """User's settings"""
 
     context = _init_default_context(request)
 
     if request.method == 'POST':
         form = SettingsForm(request.POST)
         if form.is_valid():
             selected_theme = form.cleaned_data['theme']
 
             user = _get_user(request)
             user.save_setting('theme', selected_theme)
 
         return redirect(settings)
     else:
         selected_theme = _get_theme(request)
         form = SettingsForm(initial={'theme': selected_theme})
         context['form'] = form
 
         return render(request, 'boards/settings.html', context)
 
 
 def all_tags(request):
     """All tags list"""
 
     context = _init_default_context(request)
     context['all_tags'] = Tag.objects.get_not_empty_tags()
 
     return render(request, 'boards/tags.html', context)
 
 
 def jump_to_post(request, post_id):
     """Determine thread in which the requested post is and open it's page"""
 
     post = get_object_or_404(Post, id=post_id)
 
     if boards.models.NO_PARENT == post.parent:
         return redirect(thread, post_id=post.id)
     else:
         parent_thread = get_object_or_404(Post, id=post.parent)
         return redirect(reverse(thread, kwargs={'post_id': parent_thread.id})
                         + '#' + str(post.id))
 
 
 def authors(request):
     context = _init_default_context(request)
     context['authors'] = boards.authors.authors
 
     return render(request, 'boards/authors.html', context)
 
 
 def delete(request, post_id):
     user = _get_user(request)
     post = get_object_or_404(Post, id=post_id)
 
     if user.is_moderator():
         # TODO Show confirmation page before deletion
         Post.objects.delete_post(post)
     
     if NO_PARENT == post.parent:
         return _redirect_to_next(request)
     else:
         return redirect(thread, post_id=post.parent)
 
 
 def ban(request, post_id):
     user = _get_user(request)
     post = get_object_or_404(Post, id=post_id)
 
     if user.is_moderator():
         # TODO Show confirmation page before ban
         Ban.objects.get_or_create(ip=post.poster_ip)
 
     return _redirect_to_next(request)
 
 
 def you_are_banned(request):
     context = _init_default_context(request)
     return render(request, 'boards/staticpages/banned.html', context)
 
 
 def page_404(request):
     context = _init_default_context(request)
     return render(request, 'boards/404.html', context)
 
 
 def tag_subscribe(request, tag_name):
     user = _get_user(request)
     tag = get_object_or_404(Tag, name=tag_name)
 
     if not tag in user.fav_tags.all():
         user.fav_tags.add(tag)
 
     return redirect(all_tags)
 
 
 def tag_unsubscribe(request, tag_name):
     user = _get_user(request)
     tag = get_object_or_404(Tag, name=tag_name)
 
     if tag in user.fav_tags.all():
         user.fav_tags.remove(tag)
 
     return redirect(all_tags)
 
 
 def static_page(request, name):
     context = _init_default_context(request)
     return render(request, 'boards/staticpages/' + name + '.html', context)
 
 
 def _get_theme(request, user=None):
     """Get user's CSS theme"""
 
     if not user:
         user = _get_user(request)
     theme = user.get_setting('theme')
     if not theme:
         theme = neboard.settings.DEFAULT_THEME
 
     return theme
 
 
 def _get_client_ip(request):
     x_forwarded_for = request.META.get('HTTP_X_FORWARDED_FOR')
     if x_forwarded_for:
         ip = x_forwarded_for.split(',')[-1].strip()
     else:
         ip = request.META.get('REMOTE_ADDR')
     return ip
 
 
 def _init_default_context(request):
     """Create context with default values that are used in most views"""
 
     context = RequestContext(request)
 
     user = _get_user(request)
     context['user'] = user
     context['tags'] = user.get_sorted_fav_tags()
     context['theme'] = _get_theme(request, user)
 
     return context
 
 
 def _get_user(request):
     """Get current user from the session"""
 
     session = request.session
     if not 'user_id' in session:
         request.session.save()
 
         md5 = hashlib.md5()
         md5.update(session.session_key)
         new_id = md5.hexdigest()
 
         time_now = timezone.now()
         user = User.objects.create(user_id=new_id, rank=RANK_USER,
                                    registration_time=time_now,
                                    last_access_time=time_now)
 
         session['user_id'] = user.id
     else:
         user = User.objects.get(id=session['user_id'])
         user.last_access_time = timezone.now()
         user.save()
 
     return user
 
 
 def _redirect_to_next(request):
     if 'next' in request.GET:
         next_page = request.GET['next']
         return HttpResponseRedirect(next_page)
     else:
         return redirect(index)