src/catalogue/templatetags/book_list.py

   1 # This file is part of FNP-Redakcja, licensed under GNU Affero GPLv3 or later.
   2 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
   3 #
   4 from re import split
   5 from django.db.models import Q, Count
   6 from django import template
   7 from django.utils.translation import ugettext_lazy as _
   8 from django.contrib.auth.models import User
   9 from catalogue.models import Chunk, Image, Project
  10
  11 register = template.Library()
  12
  13
  14 class ChunksList(object):
  15     def __init__(self, chunk_qs):
  16         self.chunk_qs = chunk_qs.select_related('book', 'book__project', 'stage', 'user')
  17         self.book_qs = chunk_qs.values('book_id')
  18
  19     def __getitem__(self, key):
  20         if isinstance(key, slice):
  21             return self.get_slice(key)
  22         elif isinstance(key, int):
  23             return self.get_slice(slice(key, key+1))[0]
  24         else:
  25             raise TypeError('Unsupported list index. Must be a slice or an int.')
  26
  27     def __len__(self):
  28         return self.book_qs.count()
  29
  30     def get_slice(self, slice_):
  31         book_ids = [x['book_id'] for x in self.book_qs[slice_]]
  32         chunk_qs = self.chunk_qs.filter(book__in=book_ids)
  33
  34         chunks_list = []
  35         book = None
  36         for chunk in chunk_qs:
  37             if chunk.book != book:
  38                 book = chunk.book
  39                 chunks_list.append(ChoiceChunks(book, [chunk]))
  40             else:
  41                 chunks_list[-1].chunks.append(chunk)
  42         return chunks_list
  43
  44
  45 class ChoiceChunks(object):
  46     """
  47         Associates the given chunks iterable for a book.
  48     """
  49
  50     chunks = None
  51
  52     def __init__(self, book, chunks):
  53         self.book = book
  54         self.chunks = chunks
  55
  56
  57 def foreign_filter(qs, value, filter_field, model, model_field='slug', unset='-'):
  58     if value == unset:
  59         return qs.filter(**{filter_field: None})
  60     if not value:
  61         return qs
  62     try:
  63         obj = model._default_manager.get(**{model_field: value})
  64     except model.DoesNotExist:
  65         return qs.none()
  66     else:
  67         return qs.filter(**{filter_field: obj})
  68
  69
  70 def search_filter(qs, value, filter_fields):
  71     if not value:
  72         return qs
  73     q = Q(**{"%s__icontains" % filter_fields[0]: value})
  74     for field in filter_fields[1:]:
  75         q |= Q(**{"%s__icontains" % field: value})
  76     return qs.filter(q)
  77
  78
  79 _states = [
  80         ('publishable', _('publishable'), Q(book___new_publishable=True)),
  81         ('changed', _('changed'), Q(_changed=True)),
  82         ('published', _('published'), Q(book___published=True)),
  83         ('unpublished', _('unpublished'), Q(book___published=False)),
  84         ('empty', _('empty'), Q(head=None)),
  85     ]
  86 _states_options = [s[:2] for s in _states]
  87 _states_dict = dict([(s[0], s[2]) for s in _states])
  88
  89
  90 def document_list_filter(request, **kwargs):
  91
  92     def arg_or_GET(field):
  93         return kwargs.get(field, request.GET.get(field))
  94
  95     if arg_or_GET('all'):
  96         chunks = Chunk.objects.all()
  97     else:
  98         chunks = Chunk.visible_objects.all()
  99
 100     chunks = chunks.order_by('book__title', 'book', 'number')
 101
 102     if not request.user.is_authenticated:
 103         chunks = chunks.filter(book__public=True)
 104
 105     state = arg_or_GET('status')
 106     if state in _states_dict:
 107         chunks = chunks.filter(_states_dict[state])
 108
 109     chunks = foreign_filter(chunks, arg_or_GET('user'), 'user', User, 'username')
 110     chunks = foreign_filter(chunks, arg_or_GET('stage'), 'stage', Chunk.tag_model, 'slug')
 111     chunks = search_filter(chunks, arg_or_GET('title'), ['book__title', 'title'])
 112     chunks = foreign_filter(chunks, arg_or_GET('project'), 'book__project', Project, 'pk')
 113     return chunks
 114
 115
 116 @register.inclusion_tag('catalogue/book_list/book_list.html', takes_context=True)
 117 def book_list(context, user=None):
 118     request = context['request']
 119
 120     if user:
 121         filters = {"user": user}
 122         new_context = {"viewed_user": user}
 123     else:
 124         filters = {}
 125         new_context = {
 126             "users": User.objects.annotate(
 127                 count=Count('chunk')).filter(count__gt=0).order_by(
 128                 '-count', 'last_name', 'first_name'),
 129             "other_users": User.objects.annotate(
 130                 count=Count('chunk')).filter(count=0).order_by(
 131                 'last_name', 'first_name'),
 132                 }
 133
 134     new_context.update({
 135         "filters": True,
 136         "request": request,
 137         "books": ChunksList(document_list_filter(request, **filters)),
 138         "stages": Chunk.tag_model.objects.all(),
 139         "states": _states_options,
 140         "projects": Project.objects.all(),
 141     })
 142
 143     return new_context
 144
 145
 146
 147 _image_states = [
 148         ('publishable', _('publishable'), Q(_new_publishable=True)),
 149         ('changed', _('changed'), Q(_changed=True)),
 150         ('published', _('published'), Q(_published=True)),
 151         ('unpublished', _('unpublished'), Q(_published=False)),
 152         ('empty', _('empty'), Q(head=None)),
 153     ]
 154 _image_states_options = [s[:2] for s in _image_states]
 155 _image_states_dict = dict([(s[0], s[2]) for s in _image_states])
 156
 157 def image_list_filter(request, **kwargs):
 158
 159     def arg_or_GET(field):
 160         return kwargs.get(field, request.GET.get(field))
 161
 162     images = Image.objects.all().select_related('user', 'stage', 'project')
 163
 164     if not request.user.is_authenticated:
 165         images = images.filter(public=True)
 166
 167     state = arg_or_GET('status')
 168     if state in _image_states_dict:
 169         images = images.filter(_image_states_dict[state])
 170
 171     images = foreign_filter(images, arg_or_GET('user'), 'user', User, 'username')
 172     images = foreign_filter(images, arg_or_GET('stage'), 'stage', Image.tag_model, 'slug')
 173     images = search_filter(images, arg_or_GET('title'), ['title', 'title'])
 174     images = foreign_filter(images, arg_or_GET('project'), 'project', Project, 'pk')
 175     return images
 176
 177
 178 @register.inclusion_tag('catalogue/image_table.html', takes_context=True)
 179 def image_list(context, user=None):
 180     request = context['request']
 181
 182     if user:
 183         filters = {"user": user}
 184         new_context = {"viewed_user": user}
 185     else:
 186         filters = {}
 187         new_context = {
 188             "users": User.objects.annotate(
 189                 count=Count('image')).filter(count__gt=0).order_by(
 190                 '-count', 'last_name', 'first_name'),
 191             "other_users": User.objects.annotate(
 192                 count=Count('image')).filter(count=0).order_by(
 193                 'last_name', 'first_name'),
 194                 }
 195
 196     new_context.update({
 197         "filters": True,
 198         "request": request,
 199         "objects": image_list_filter(request, **filters),
 200         "stages": Image.tag_model.objects.all(),
 201         "states": _image_states_options,
 202         "projects": Project.objects.all(),
 203     })
 204
 205     return new_context