src/wolnelektury/views.py

   1 # -*- coding: utf-8 -*-
   2 # This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
   3 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
   4 #
   5 from datetime import date, datetime
   6 import feedparser
   7
   8 from django.conf import settings
   9 from django.contrib import auth
  10 from django.contrib.auth.decorators import login_required
  11 from django.contrib.auth.forms import UserCreationForm, AuthenticationForm
  12 from django.core.cache import cache
  13 from django.http import HttpResponse, HttpResponseRedirect
  14 from django.shortcuts import render
  15 from django.utils.http import urlquote_plus
  16 from django.utils.translation import ugettext_lazy as _
  17 from django.views.decorators.cache import never_cache
  18
  19 from ajaxable.utils import AjaxableFormView
  20 from ajaxable.utils import placeholdized
  21 from catalogue.models import Book, Collection, Tag, Fragment
  22 from ssify import ssi_included
  23
  24
  25 def main_page(request):
  26     ctx = {
  27         'last_published': Book.objects.exclude(cover_thumb='').filter(parent=None).order_by('-created_at')[:6],
  28     }
  29
  30     for category in ('author', 'epoch', 'genre', 'kind'):
  31         try:
  32             ctx[category] = Tag.objects.filter(category=category).order_by('?')[:1][0]
  33         except IndexError:
  34             pass
  35
  36     # FIXME: find this theme and books properly.
  37     ctx['theme_books'] = []
  38     if Fragment.objects.count():
  39         while True:
  40             ctx['theme'] = Tag.objects.filter(category='theme').order_by('?')[:1][0]
  41             tf = Fragment.tagged.with_any([ctx['theme']]).order_by('?')[:100]
  42             if not tf:
  43                 continue
  44             ctx['theme_fragment'] = tf[0]
  45             for f in tf:
  46                 if not f.book in ctx['theme_books']:
  47                     ctx['theme_books'].append(f.book)
  48                 if len(ctx['theme_books']) == 3:
  49                     break
  50             break
  51
  52     # Choose a collection for main.
  53     try:
  54         ctx['collection'] = Collection.objects.order_by('?')[:1][0]
  55     except IndexError:
  56         pass
  57
  58     ctx['best'] = Book.objects.order_by('?')[:5]
  59
  60     return render(request, "main_page.html", ctx)
  61
  62
  63 class LoginFormView(AjaxableFormView):
  64     form_class = AuthenticationForm
  65     template = "auth/login.html"
  66     placeholdize = True
  67     title = _('Sign in')
  68     submit = _('Sign in')
  69     ajax_redirect = True
  70
  71     def __call__(self, request):
  72         if request.user.is_authenticated():
  73             return self.redirect_or_refresh(request, '/',
  74                 message=_('Already logged in as user %(user)s', ) %
  75                             {'user': request.user.username})
  76         return super(LoginFormView, self).__call__(request)
  77
  78     def success(self, form, request):
  79         auth.login(request, form.get_user())
  80
  81
  82 class RegisterFormView(AjaxableFormView):
  83     form_class = UserCreationForm
  84     template = "auth/register.html"
  85     placeholdize = True
  86     title = _('Register')
  87     submit = _('Register')
  88     ajax_redirect = True
  89     form_prefix = 'register'
  90     honeypot = True
  91
  92     def __call__(self, request):
  93         if request.user.is_authenticated():
  94             return self.redirect_or_refresh(request, '/',
  95                 message=_('Already logged in as user %(user)s', ) %
  96                             {'user': request.user.username})
  97         return super(RegisterFormView, self).__call__(request)
  98
  99     def success(self, form, request):
 100         form.save()
 101         user = auth.authenticate(
 102             username=form.cleaned_data['username'],
 103             password=form.cleaned_data['password1']
 104         )
 105         auth.login(request, user)
 106
 107
 108 class LoginRegisterFormView(LoginFormView):
 109     template = 'auth/login_register.html'
 110     title = _('You have to be logged in to continue')
 111
 112     def extra_context(self, request, obj):
 113         return {
 114             "register_form": placeholdized(UserCreationForm(prefix='register')),
 115             "register_submit": _('Register'),
 116         }
 117
 118
 119 @never_cache
 120 def logout_then_redirect(request):
 121     auth.logout(request)
 122     return HttpResponseRedirect(urlquote_plus(request.GET.get('next', '/'), safe='/?='))
 123
 124
 125 @never_cache
 126 def clock(request):
 127     """ Provides server UTC time for jquery.countdown,
 128     in a format suitable for Date.parse()
 129     """
 130     return HttpResponse(datetime.utcnow().strftime('%Y/%m/%d %H:%M:%S UTC'))
 131
 132
 133 def publish_plan(request):
 134     cache_key = "publish_plan"
 135     plan = cache.get(cache_key)
 136
 137     if plan is None:
 138         plan = []
 139         try:
 140             feed = feedparser.parse(settings.PUBLISH_PLAN_FEED)
 141         except:
 142             pass
 143         else:
 144             for i in range(len(feed['entries'])):
 145                 plan.append({
 146                     'title': feed['entries'][i].title,
 147                     'link': feed['entries'][i].link,
 148                     })
 149         cache.set(cache_key, plan, 1800)
 150
 151     return render(request, "publish_plan.html", {'plan': plan})
 152
 153
 154 @login_required
 155 def user_settings(request):
 156     return render(request, "user.html")
 157
 158
 159 @ssi_included(use_lang=False, timeout=1800)
 160 def latest_blog_posts(request, feed_url=None, posts_to_show=5):
 161     if feed_url is None:
 162         feed_url = settings.LATEST_BLOG_POSTS
 163     try:
 164         feed = feedparser.parse(str(feed_url))
 165         posts = []
 166         for i in range(posts_to_show):
 167             pub_date = feed['entries'][i].published_parsed
 168             published = date(pub_date[0], pub_date[1], pub_date[2])
 169             posts.append({
 170                 'title': feed['entries'][i].title,
 171                 'summary': feed['entries'][i].summary,
 172                 'link': feed['entries'][i].link,
 173                 'date': published,
 174                 })
 175     except:
 176         posts = []
 177     return render(request, 'latest_blog_posts.html', {'posts': posts})
 178
 179
 180 @ssi_included(use_lang=False)
 181 def widget(request):
 182     return render(request, 'widget.html')