apps/catalogue/templatetags/book_list.py

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